CHLOROPRENE RUBBER (KLOROPREN KAUCUK) , POLKLOROPRENE ( POLYCHLOROPRENE )

chloroprene rubber (kloropren kaucuk) , polikloroprene ( polychloroprene )

SYNONMYS;Kloro pren, poli kloro pren, poli, kloro, pren, polikloropren,polychlorprene, polychloropren, chloroprene,chlorprene; poli chrome; poli chromic; poli chromous; poli chromic; kloropren ng. chloropréne; polychloroprene;poly chloroprene; pol chloroprene; polichloroprene; polichloropren ; poly; chloroprene; poli; chloropren;kloro; propen; kloropropen;kloro; kloropropen; kloro; propren; propiren; koucuk; kaucuk; kauçuk; neoprene; neo; prene; neo prene; poly- +‎ chloroprene; polikloropren kauçuk ; poli kloropen kauçuk;poli; kloropen; kauçuk; kaucuk; polychloropren, poly ; chloro propen; poli chloro propen; poli chloro; prop; propene; propenen; polychloropropenen;polycentric;polycentrism;polychaete; polychaetous; polychasia; polychasium; polychete; polychlorinated; polychlorinated ; biphenyl; polychotomous; polychotomy;polychrest; polychroic; polychroism; polychromatic; polychromatism; polychrome; polychromic; polychromous; polychromy; poly centric;poly centrism;poly chaete; poly chaetous; polychasia; polychasium; polychete; polychlorinated; polychlorinated ; biphenyl; polychotomous; polychotomy;poly chrest; poly chroic; poly chroism; poly chromatic; poly chromatism; poly chrome; poly chromic; poly chromous; poly chromy; policentric;policentrism;polichaete; polichaetous; polichasia; polichasium; polichete; polichlorinated; polichlorinated ; biphenil; polichotomous; polichotomi;polichrest; polichroic; polichroism; polichromatic; polichromatism; polichrome; polichromic; polichromous; polichromi; poli centric;poli centrism;poli chaete; poli chaetous;polichasia; polichasium; polichete; polichlorinated; polichlorinated ; biphenil; polichotomous; polichotomi;poli chrest; poli chroic; poli chroism; poli chromatic; poli chromatism; poli chrome; poli chromic; poli chromous; poli chromic; CHLOROPRENE RESIN;POLYCHLOROPRENE;POLY(2-CHLORO-1,3-BUTADIENE);NEOPRENE GNA;NEOPRENE GRT;NEOPRENE GW;NEOPRENE(R);NEOPRENE TRT; Polychloroprene;Polymers;Dienes;Hydrophobic Polymers;Polymer Science;Hydrophobic Polymers;Materials Science;Polymer Science; CHLOROPRENE; 2-Chloro-1,3-butadiene; 2-Chlorobuta-1,3-diene,Chlorobutadiene;1,3-Butadiene, 2-chloro-; 2-Chlorobutadiene; 126-99-8; Neoprene;Chloropreen; Cloroprene, 2-Chlor-1,3-butadien;beta-Chloroprene2-Cloro-1,3-butadiene; .beta.-Chloroprene; 2-Chloor-1,3-butadieen; Chloropreen [Dutch]; POLYCHLOROPRENE; Cloroprene [Italian]i 2-Chloroprene; UNII-42L93DWV3A; NSC 18589 Chloropren [German, Polish]; CCRIS 873; HSDB 1618; 2-Chlor-1,3-butadien [German]; 2-Chloor-1,3-butadieen [Dutch]; 2-Cloro-1,3-butadiene [Italian]; EINECS 204-818-0, UN1991; 42L93DWV3A; CHEBI:39481; YACLQRRMGMJLJV-UHFFFAOYSA-N; Chloroprene, uninhibited [Forbidden]; beta-Chloroprene 2-Chloro-1,3-butadiene; C4H5Cl; 14523-89-8; alpha-Chloroprene; beta-Chlorobutadiene; Chloroprene, inhibited; .beta.-Chlorobutadiene; ; Chloroprene, uninhibited; 2-Chlorobutadiene 1,3, AC1L1LH; EC 204-818-0; WLN: 1UYG1U1; 9010-98-4; ; CHLOROPRENE (NEOPRENE), Chloropren(GERMAN, POLISH); CHEMBL555660;CHLO ROPRENE (NEOPRENE), DTXSID5020316; Chloroprene (>96% chloroprene)CTK4C4446; 1,3-Butadiene,2-chloro-, dimer, Chloroprene (99.6% chloroprene); NSC18589; ZINC1561508, 7172AF; LS-707; NSC-18589; AKOS028108417; Chloroprene (2-chloro-1,3-butadiene); UN 1991; AN-20342; AN-22991; CJ-24525; FT-0611680; C19208,C19502; 157447-EP2275417A2 157447-EP2284162A2; 157447-EP2284163A2; 179420-EP2277945A1, 186949-EP2270113A1; 186949-EP2272935A1i2-Chloro-1,3-butadiene (Chloroprene) (50% in Xylene), Chloroprene Solution, 5000 microg/mL in P/T Methanol; Chloroprene, inhibited [UN1991] [Flammable liquid, Poison]; Chloroprene, inhibited [UN1991] [Flammable liquid, Poison]; 184963-09-5;CHLOROPRENE RU KLORO PREN, POLI KLORO PREN, POLI, KLORO, PREN, POLIKLOROPREN,POLYCHLORPRENE, POLYCHLOROPREN, CHLOROPRENE,CHLORPRENE; POLI CHROME; POLI CHROMIC; POLI CHROMOUS; POLI CHROMIC; KLOROPREN ING. CHLOROPRÉNE; POLYCHLOROPRENE;POLY CHLOROPRENE; POLI CHLOROPRENE; POLICHLOROPRENE; POLICHLOROPREN ; POLY; CHLOROPRENE; POLI; CHLOROPREN;KLORO; PROPEN; KLOROPROPEN;KILORO; KILOROPROPEN; KLORO; PROPREN; PROPIREN; KOUCUK; KAUCUK; KAUÇUK; NEOPRENE; NEO; PRENE; NEO PRENE; POLY- +‎ CHLOROPRENE; POLIKLOROPREN KAUÇUK ; POLI KLOROPEN KAUÇUK;POLI; KLOROPEN; KAUÇUK; KAUCUK; POLYCHLOROPREN, POLY ; CHLORO PROPEN; POLI CHLORO PROPEN; POLI CHLORO; PROP; PROPENE; PROPENEN; POLYCHLOROPROPENEN;POLYCENTRIC;POLYCENTRISM;POLYCHAETE; POLYCHAETOUS; POLYCHASIA; POLYCHASIUM; POLYCHETE; POLYCHLORINATED; POLYCHLORINATED ; BIPHENYL; POLYCHOTOMOUS; POLYCHOTOMY;POLYCHREST; POLYCHROIC; POLYCHROISM; POLYCHROMATIC; POLYCHROMATISM; POLYCHROME; POLYCHROMIC; POLYCHROMOUS; POLYCHROMY; POLY CENTRIC;POLY CENTRISM;POLY CHAETE; POLY CHAETOUS; POLYCHASIA; POLYCHASIUM; POLYCHETE; POLYCHLORINATED; POLYCHLORINATED ; BIPHENYL; POLYCHOTOMOUS; POLYCHOTOMY;POLY CHREST; POLY CHROIC; POLY CHROISM; POLY CHROMATIC; POLY CHROMATISM; POLY CHROME; POLY CHROMIC; POLY CHROMOUS; POLY CHROMY; POLICENTRIC;POLICENTRISM;POLICHAETE; POLICHAETOUS; POLICHASIA; POLICHASIUM; POLICHETE; POLICHLORINATED; POLICHLORINATED ; BIPHENIL; POLICHOTOMOUS; POLICHOTOMI;POLICHREST; POLICHROIC; POLICHROISM; POLICHROMATIC; POLICHROMATISM; POLICHROME; POLICHROMIC; POLICHROMOUS; POLICHROMI; POLI CENTRIC;POLI CENTRISM;POLI CHAETE; POLI CHAETOUS;POLICHASIA; POLICHASIUM; POLICHETE; POLICHLORINATED; POLICHLORINATED BBER (KLOROPREN KAUCUK) , POLIKLOROPRENE ( POLYCHLOROPRENE )

POLYCHLOROPRENE FOR CONTACT ADHESIVES

Chloroprene rubber has many superior characteristics compared to natural and even other synthetic rubber types, so it has numerous applications. In particular, its possible uses have been expanded to civil engineering/construction and precision components as well. Our company meets such needs by providing a wide range of grades such as special denatured types, and latex best suited to making aqueous adhesives, etc

Polychloroprene (chloroprene rubber) is a polymer made from the monomer 2-chloro-1,3-butadiene. It is produced by state-of-the-art processes with over 50 years` experience. Good resistance to environmental influ-ences, excellent solubility in many organic solvents and sol¬vent mixtures, as well as a high rate of crystallization make it ideal for the production of solvent based contact adhesives. The polychloroprene product line for adhesive applications is now offered.

Adhesives based on Polychloroprene are specially suitable for contact bonding. This bonding technique requires the application of the adhesive on both substrates. After brief surface drying the substrates are joined with pressure with¬in the open time (contact bonding time) of the adhesive. One of the most prominent features of adhesives based on polychloroprene is the high initial strength that is estab¬lished instantly with joining. The bonded substrates can be handled immediately, fixation of the substrates until the cure is finalized is not needed. The initial strength as well as the open time can be influenced by the pressure during bond¬ing. The higher the pressure, the higher is the initial strength and the longer is the contact bonding time.

Following momentary strength, crystallization of the polychloroprene further increases cohesion, resulting in a final bond strength, that is markedly exceeding adhesion strength achievable with contact adhesives based on natural or nitrile rubber.

Apart from their simple, economical processing, contact adhesives based on our polychloroprenes are distinguished by their excellent adhesion to a wide range of materials. Addi¬tionally they allow formation of soft bond lines for the joining of flexible substrates like rubber, foams or leather.

Main application industries

The demand for contact adhesives based on polychlorprene is particularly high in the shoe industry, in fabrication of mattresses, in furniture production, in the construction and automotive industries and in the do-it-yourself sector.

Polychloroprene adhesive raw materials are soluble in many organic solvents and solvent mixtures. The solvent or sol¬vent mixture used to produce the adhesive is chosen ac¬cording to both economic and technical considerations. It has to be taken into account, for example, that the solvent can have a considerable influence on:

the viscosity of the adhesive

the compatibility of the adhesive with an added crosslinking agent

the behavior of the adhesive during storage at low temperatures

the occurrence of phase separation during the storage of resin-containing adhesives

the wetting of the substrate surface

the drying of the adhesive film

the open time of the adhesive film

the curing rate of the bond

Apart from the influence on the technical properties of the adhesives, the physiological effect of the solvents also has to be considered. The use of certain solvents is subject to restrictions or is completely banned in some countries. Furthermore, attention must be paid to the flammability of many solvents and their ability to form explosive mixtures with air.

Choice of solvent

the viscosity of the adhesive

the compatibility of the adhesive with an added crosslinking agent

the behavior of the adhesive during storage at low temperatures

the occurrence of phase separation during the storage of resin-containing adhesives

the wetting of the substrate surface

the drying of the adhesive film

the open time of the adhesive film

the curing rate of the bond

Perfectly suited, efficient, economical – polychloroprene for adhesives, on which industries such as furniture production rely from experience

Modification of the adhesive formulation with additives

Addition of zinc oxide and magnesium oxide to the adhesive formulation is advisable as these metal oxides are acting as acid scavengers and are increasing the bond strength. In combination with an alkyl phenolic resin magnesium oxide is additionally enhancing the temperature resistance of the bond. Resins in general are added to increase contact bonding time and tack.

If formulated well, adhesives based on polychloroprene can be used in combination with isocyanates in two part adhesives, giving adhesives with higher cohesion, heat stability and ad-hesion to difficult-to-bond substrates.

Products from the 300 grade line are additional suitable for grafting with methyl methacrylate (MMA). By grafting with MMA, the adhesion to plasticized polyvinylchloride (PVC) is enhanced.

High performance adhesives based on polychloroprenes

Physical Properties:

• Polychloroprene vulcanizates possess good physical strength, and with optimum formulations, the level is comparable to that of NR, SBR, or NBR.

• Tear resistance of CR vulcanizates is better than that of SBR. Tear propagation resistance of CR vulcanizates containing active silica may be greater than that of those with natural rubber.

• The compression set of CR is low over a wide range of temperatures from -10 degree C to 145 degree C.

• For CR, testing is commonly run at -10 degree C, the temperature at which optimum crystallization occurs. It is possible to improve the low-temperature compression set to less than 50% at -30 degree C by using the most crystallization resistant CR

• The abrasion resistance of CR is comparable to that of NBR

Abrasion resistance:

To improve the Abrasion resistance N330 or 326 40 parts can be added N326 particularly useful where abrasion resistance is required.

H High Strength at Elevated Temperatures

• Precipitated silica up to 40 parts, preferably with up to 3 parts triethanolamine or other surface-active dispersing aid, is particularly effective in retaining vulcanizate physical properties at temperatures to 200°C short term.

Tear Resistance

• Sulfur modified grades are good than other grades. They possess excellent flex fatigue resistance with usually adequate compression set resistance.

• Among fillers, precipitated silica with a dispersing aid is the best but other minerals such as silicates and hard clays may also give better tear values than most carbon blacks, at the expense of poorer compression set resistance.

• N326 (HAF-LS) carbon black can give a good balance of tear and set properties provided that good dispersion is achieved,oil addition should be avoided during incorporation of the black.

• Resinous plasticizers such as coumarones or alkyl aromatic, at 5 parts also help achieve optimum tear strength. Natural rubber, 10-20 parts, may also assist but inevitably diminishes oil and ozone resistance.

Electrical Properties

• Neoprene is not normally considered a primary insulating material. To optimize its capabilities, mineral fillers should be specified for their higher insulation resistance and dielectric strength as compared with carbon blacks.

• Platy talcs such as Mistron®Vapor are recommended for dielectric strength.

• Ester plasticizers should be avoided.

• Up to 15 parts naphthenic oil may be incorporated but a hydrocarbon resin, such as Kenflex ®A-1, will optimize insulation resistance.

• Where antistatic properties are essential, incorporation of conductive furnace blacks such as N283 (CF) or N472 (XCF) will achieve this, as in other elastomers

Flame resistance

• The inherent self-extinguishing characteristics of all Neoprene grades may be enhanced or diminished by compounding.

• Chlorinated paraffins varying between 40 and 70% combined chlorine contents, solid or liquid, may be used both to plasticize and to increase the available chlorine level.Blends of solid and liquid chlorinated paraffins also reduce sticking tendencies.

• Hydrated alumina enhances self-extinguishing characteristics and raises auto-ignition temperatures. It may be used in combination with carbon blacks to achieve tensile requirements. China clays and calcium silicate are also used but do not have the specific effects of hydrated alumina.

•

• Other additives to enhance self-extinguishing include antimony trioxide, alone or preferably as a synergistic 3:1 combination with decabromo biphenyl ether

• Magnesium hydroxide finds use as a smoke suppressant.

• Hydrocarbon-based plasticizers and process aids should be avoided or severely restricted since they support combustion.

Building Tack

• Aromatic plasticizers give more tack than naphthenicor ester types.

• Other tack promoters are coumaroneindene resins, especially liquid types, wood rosin and phenolic resins such as Koresin.

• Aromatic oils are more prone to cause troublesome roll sticking than other types.

• As noted under Processing Aids, 3-5 parts high-cis 1,4-polybutadiene can alleviate problems of excessive roll sticking.

• To maintain building tack no dusting agents should be applied to sheeted stocks. Batch-off liners should be nonstick

Adhesion:

• Combination of HAF with 10 phr precipitated silica improve the bond strength Plasticizer – Aromatic oil.

• For direct bonding to non ferrous metals such as brass or zinc may be accomplished without using primer by 1.5 phr of sulphur . In these case ETU derivative should be avoided.

Compression Set resistance:

• For recovery from compression at low temperature the minimum level of water plasticizer such as 10 parts DOS should be used.

Crystallization resistance:

• Inclusion of 1 phr sulphur will retard vulcanization crystallization at he expense of heat aging and compression Set resistance.

High strength at elevated temperature:

• Precipitated silica Upto 40 parts preferably with 3 parts triethanolamine or other surface active dispersing acid is effective.

• Electrical wiring and cables

• Automotive components

• Belts, hoses

• Coated cloth, foam rubber

• General industrial articles

• Adhesives, etc.

CR Chloroprene Rubber is based on 2-chloro-1,3-butadiene (chloroprene), which are manufactured by waterbased emulsion polymerization in the presence of emulsifiers, activators etc. Available brands are Baypren, Denka etc.

– CR is suitable for moldings and extrudates of all types, reinforced hoses, roll covers, belting, including conveyor belts, air spring bellows, cable sheathing and insulation for low-voltage cables, sponge rubber, including open and closedcell sponge rubber, corrosion-resistant linings, sheeting, fabric proofings and footwear (boots).

– CR Chloroprene Near to Prime Products are provided which have more different properties than their prime grade about mooney viscosity, volatile matter, Ash content, organic acids content or they are start-up materials because the goods are near to prime materials but the goods have special technical data sheet.

– CR Chloroprene Near to Prime product`s preferability reason is cheaper than their prime grade`s because users prefer them.

Chloroprene rubber , also known as polychloroprene or chlorobutadiene rubber , is a synthetic rubber used , inter alia, in the automotive industry and for thermal

insulation sportswear. In German-speaking countries it is known under the generic brand name neoprene . Neoprene is a trademark of the company DuPont , trade names of

other manufacturers are z. B. Baypren of Lanxess . The preparation is carried out by polymerization of 2-chloro-1,3-butadiene ( chloroprene ). The abbreviation is

ISO 1043 (1975) for chloroprene rubberCR .

history

The basic idea comes from Julius Arthur Nieuwland , who worked with Wallace Hume Carothers of DuPont . In 1930, by the team of Carothers, Arnold Collins polymerized , for the first time, polychloroprene in an emulsion process under economically favorable conditions . In 1932, the US company DuPont brought the polymer initially under the name Duprene, 1938 then as Neoprene on the market. In the following decades, there have been various improvements in the manufacturing process and polymer properties:

Sulfur (Neoprene GN) copolymers for improved processability in 1939 (DuPont);

Mercaptan -regulated variants in the 1950s (DuPont) for improved heat resistance and solubility;

Xanthate -modified chloroprene rubber in the eighties (Bayer AG) for improved properties of the vulcanized and reduced tendency to crystallize .

manufacturing

Chloroprene rubber is produced industrially in the process of emulsion polymerization. The resulting dispersion is precipitated by acid addition followed by cooling , dried and usually commercialized in the form of chips for the processing industry. To prevent sticking of the chips, they are powdered with talc . But even the polymer dispersion itself is used as an adhesive, a known commercial form are, for. B. the crystallizing types under the trade name Dispercoll® C.

Due to the regular structure and high proportion of 1,4- trans linkages of the monomer during the polymerization polychloroprene tends more or less to crystallize, which leads to the hardening of the material some time after processing. This is desirable for adhesives, but less so for rubber articles. By suitable choice of the polymerization temperature of the co-monomers and by use of regulators for adjusting the molar mass , the crystallization tendency can be correspondingly influenced in the desired direction.

Properties and applications

A surf suit

Resolved in organic solvents, polychloroprene, as well as the polymer dispersion itself, due to the good resistance also suitable for various adhesives . Vulcanizates are characterized by chemical resistance, good resistance to embrittlement , weathering , ozone attack and by flame retardancy.

Good swelling resistance in mineral oils with high aniline point , fats , many refrigerants and water (with a special mixture structure).

Medium swelling resistance in mineral oils, low molecular weight aliphatic hydrocarbons ( light gasoline , isooctane).

Strong swelling in aromatics, eg. As benzene , toluene , chlorinated hydrocarbons, esters , ethers , ketones .

Thermal application range from -45 ° C to +100 ° C depending on the composition of the mixture (short-term up to 130 ° C).

Hoses, cable sheathings, extruded profiles, seals and drive belts based on chloroprene rubber are reflected in the favorable combination of properties, especially in the automotive industry.

A known application, for. B. as a material for diving suits, is the foamed vulcanizate. By using chemical blowing agents which release gases below the vulcanization temperature, a pressure-resistant foam or foam rubber or foam rubber with excellent insulating properties can be obtained.

Worldwide consumption of chloroprene rubber including adhesives is estimated at over 300,000 tons per year.

vulcanization

Chloroprene rubber does not vulcanize with sulfur unlike most other unsaturated elastomers. Usually, for the vulcanization of polychloroprene metal oxides such as zinc oxide (ZnO) and magnesium oxide (MgO) are used. For improved water resistance, lead oxide can be used to a limited extent for reasons of environmental protection . A typical vulcanization accelerator is ethylene thiourea (ETU also = E thylene T hio U rea) serving as a sulfur donor (sulfur donor)applies. The chemical structures that arise in the vulcanization of polychloroprene by ZnO and MgO in the presence of ETU, are solely due to the reaction of allylic- bonded chlorine (see above: 1,2-unit), which is present only a few percent in the polymer chain is. The vinyl- bonded chlorine atoms present in the majority (see above: 1,4 unit) practically do not react under the vulcanization conditions (about 160 ° C.). For this reason, the crosslinking density of polychloroprene can not be increased by higher additions of the vulcanizing agent.

Ethylene thiourea (ETU) accelerators are the current industry standard in accelerating the vulcanization process. However, ETU has since been categorized by various European authorities as potentially carcinogenic. It is expected that the use of this substance by the EU will be curtailed or banned in the near future. Small and medium-sized enterprises (SMEs) in the rubber industry will be particularly hard hit, especially given the increasing competition from Asian countries with less stringent health and safety regulations. A large consortium used the EU investment to find a safe substitute for ETUs. As part of the project SAFERUBBER scientists have developed an environmentally friendly and cost-effective alternative.SRM102 “has many significant benefits: SRM102 chloroprene rubbers have improved flow properties and are therefore much easier to fill in molds, allowing both the amount of rubber used and the associated rejects to be reduced zinc oxide, a vulcanization activator. [1] For the full report of the European Commission, see:

Polychloroprene can be polymer blended with a range of other polymers including : natural rubber (NR) or polybutadiene (BR) to reduce costs and improve low temperature flexibility with styrene-butadiene rubber (SBR) to reduce cost and crystallization and nitrile rubber (NBR) to improve the oil resistance.

Foamed neoprene

In the foamed neoprene many small gas bubbles are evenly distributed, which gives it excellent thermal insulating properties. The best known is this variant by cold weather suits for water sports ( diving suits , surfing suits ). But bottle coolers, sports bandages and protective covers of all kinds, soundproofing for staircases or other requirements are made of foamed neoprene.

For the use of sportswear neoprene is made in different thicknesses according to the desired thermal insulation . Thicker material insulates better but is less stretchable and has higher buoyancy .

Usually neoprene is laminated on both sides with textile fabric ( nylon or Lycra ) , which makes the surface more closed and less prone to damage. Smooth skin neoprene is only laminated on one side and has a closed, smooth rubber surface on one side. This material is suitable for sealing strips within the neoprene-Dress. In addition to the laminated suit versions, there are also unbacked. They are particularly elastic and because of their tight fit also water and thus heat-insulating. The advantage lies especially in the flexibility that allows a great freedom of movement. A disadvantage is their sensitivity to mechanical influences.

In the production of neoprene clothing, the material is glued together on impact .

Foamed neoprene

In the foamed neoprene many small gas bubbles are evenly distributed, which gives it excellent thermal insulating properties. The best known Neoprene (polychloroprene)

Neoprene is an elastomer that you know from wetsuits.

Neopren is invented by the international company DuPont and is basically a trademark of DuPont.

Neoprene or polychloroprene is an elastomer. It is a synthetic rubber material filled with air bubbles. It is flexible and, due to the air bubbles, has a good insulation ability. It is used for a variety of purposes, including: wetsuits. The material is prepared by polymerization of chloroprene.

Neoprene is more resistant than both natural and synthetic rubber. It is more inert (inactive) which makes it suitable for demanding applications such as gaskets, hoses and corrosion-resistant coatings. It can be used as a base in adhesives, sound insulation in installations and as a lining in metalemballage.is this variant by cold weather suits for water sports (diving suits, surfing suits). But bottle coolers, sports bandages and protective covers of all kinds, soundproofing for staircases or other requirements are made of foamed neoprene.

For the use of sportswear neoprene is made in different thicknesses according to the desired thermal insulation. Thicker material insulates better but is less stretchable and has higher buoyancy.

Usually neoprene is laminated on both sides with textile fabric (nylon or Lycra), which makes the surface more closed and less prone to damage. Smooth skin neoprene is only laminated on one side and has a closed, smooth rubber surface on one side. This material is suitable for sealing strips within the neoprene dress. In addition to the laminated suit versions, there are also unbacked. They are particularly elastic and because of their tight fit also water and thus heat-insulating. The advantage lies especially in flexibility that allows a great freedom of movement. A disadvantage is their sensitivity to mechanical influences.

In the production of neoprene clothing, the material is glued together on impact.

Weather conditions, sun, ozone and abrasion resistance,

High resilience property,

Gas tightness,

Heat, oil and flame resistance,

Good performance at low temperatures,

Good electrical properties

Usage areas

Use of latex dispersions;

Water based adhesives

Products such as gloves and balloons produced by dipping method

Waterproof coatings used in construction industry

Solid polychloroprene rubber applications:

Solvent based adhesives

Vibration-damping engine parts

Cables, gaskets, dust tires and sealing products

Products produced by mold and extrusion method

Foam sheets used in diving suits and laptop covers

Carrier layers used in road and bridge construction

Belts and hoses used in the general industrial and automotive industries

CR – POLYCHLOROPRENE (NEOPRENE)

PROPERTIES

Chloroprene Rubber (CR), also known as chlorobutadiene rubber, is an important diene-based elastomer. The name Neoprene is a registered trademark of DuPont Performance Elastomers.

The commercial grades are mostly trans-1,4-polychloroprene produced by free-radical emulsion polymerization of 2-chloro-1,3-butadiene. The chlorine in the polymer reduces the reactivity to many oxidizing agents.

Chloroprene rubber typically displays good resistance to ozone cracking, heat aging and to chemical attack. For example, it has good resistance to many chlorofluorocarbons, aliphatic hydrocarbons, mineral oils, greases and ozone, but only moderate or poor resistance to acids, solvents, and fuels. Its flame resistance is excellent. In fact, chloroprene is one of the few rubbers that are self-extinguishing. It also gives excellent rubber-to-metal bonds. However, chloroprene tends to harden over time and degrades in the presence of some fairly common chemicals such as hydrochloric acid, acetone, xylene, acetic acid, and hydrogen peroxide.

Its mechanical properties are generally inferior to those of natural rubber but it has superior chemical resistance.

COMMERCIAL CR ELASTOMERS

Major manufacturers of polychloroprene elastomers are Lanxess, Tosoh, and Denka.

APPLICATIONS

Chloroprene is used primarily for gaskets, cable jackets, tubing, seals, O-rings, tire-sidewalls, gasoline hoses and weather-resistant products such as wet suits and orthopedic braces. It is also used as a base resin in adhesives, electrical insulations and coatings.

It has many useful properties and a reasonable price.

Stiren-akrilonitril (SAN)

Stiren ve akrilonitril, yaklak 70 ila 30 orannda, serbest radikal balatclar kullanlarak emülsiyon, hacim veya çözelti koullar altnda kopolimerize edilir. Kopolimer, yalnzca polistirenden ziyade, sya ve çözücülere daha iyi direnç gösteren sert, effaf bir plastiktir. Üretilen SAN’n çou ABS ile harmanlanr. Balca kullanmlar otomotiv parçalar, batarya kutular, mutfak eyalar, ev aletleri, mobilya ve tbbi malzemelerdir.

Nitril kauçuk (nitril-bütadien kauçuk, NBR)

SBR gibi, nitril kauçuk da iki dünya sava srasnda ve arasnda sentetik kauçuk aratrmalarnn bir ürünüdür. Buna bal olarak, bir akrilonitril-bütadien kopolimer grubu olan N, 1934 ylnda IG Farben kimyagerleri Erich Konrad ve Eduard Tschunkur tarafndan patenti alnd. Amerika Birleik Devletleri’nde II. Dünya Sava srasnda GR-N (Devlet Kauçuk-Nitril) olarak üretilen bu ürün, petrole olan olaanüstü dayankll ile deerlendirildi.

NBR, serbest radikal balatclar kullanlarak emülsiyon ilemlerinde hazrlanr. Kopolimerde bulunan akrilonitril miktar yüzde 15 ila 50 arasnda deimektedir. Akrilonitril içeriinin artmasyla birlikte kauçuk, daha yüksek mukavemet, hidrokarbon yalar ile imeye kar daha fazla direnç ve gazlara kar daha düük geçirgenlik gösterir – bununla birlikte, cam geçi scakl da yükseltilirken, kauçuun düük scaklklarda daha az esnek olmas salanr. NBR’nin ana kullanmlar yakt hortumlar, contalar, silindirler ve ya direncinin gerekli olduu dier ürünlerdir. Ayrca dokuma ve dokuma olmayan kumalara uygulanmasnn bitirme ve su yaltm özelliklerini gelitirdii tekstillerde de kullanlr.

HNBR olarak ksaltlm olan hidrojene edilmi bir versiyon, ayrca termal ve oksidatif bozulmaya kar oldukça dirençlidir ve düük scaklklarda esnek kalr.

Ev aksesuarlar

Son zamanlarda, neopren, dizüstü bilgisayar klflar, tablet tutucular, uzaktan kumandalar, fare altlklar ve bisiklet dolab gibi dier ev aksesuarlar için favori bir malzeme haline geldi. Bu pazarda, bazen daha dayankl (daha darbeye dayankl) ancak daha az kullanlan bir malzeme olan LRPu (düük dirençli poliüretan) ile rekabet eder.

Müzik

Neopren tozluk giyen bir kadn

Rodos piyano, 1970’li yllarda keçe çekiçlerinden deitirildikten sonra, elektrikli piyanolarnda neoprenden yaplm çekiç uçlar kulland.

Neopren ayrca hoparlör konileri ve bateri çalg tablalar için de kullanlyor. “4 Büyük Davul Sesi”. Müzik yapmak. 20 ubat 2015. 7 Aralk 2018 tarihinde alnd.

Topraksz bahçecilik

Hidroponik ve havalandrmal bahçe sistemleri, kesimleri ilerletirken veya a kaplar kullanrken bitkileri yerinde tutmak için küçük neopren uçlardan yararlanr. Uçlar nispeten küçüktür ve 1,5 ila 5 inç (4 ila 13 cm) arasndadr. Neopren, esneklii ve yumuakl nedeniyle bitkileri destekleme konusunda iyi bir seçimdir ve bitkilerin gövdeye zarar verme ans olmadan güvenli bir ekilde yerinde tutulmasn salar. Neopren kök örtüleri ayrca n hidroponik sistemlerin kök odasna girmesini engelleyerek daha iyi kök büyümesi ve yosun geliiminin engellenmesine yardmc olur. [Kaynak belirtilmeli]

Otomotiv endüstrisi

Otomotiv endüstrisinde, neopren, genellikle araba koltuklar veya araba koltuu kapaklar için bir malzeme olarak kullanlr [13]. Anmaya dayankl ve koruyucu özelliklerinden dolay, birçok otomobil üreticisi ek koltuk korumas için bir seçenek olarak neopren koltuklar sunar. Bu koltuk klflar ayrca aktif sürücüler için araç paketlerine de dahil edilir. Neopren, neme kar oturma korumas için kauçuk bir tabakaya dayanmaktadr.

Dier

Neopren, Cadlar Bayram maskeleri ve yüz korumas için kullanlan, CPU soketlerini yaltmak, su geçirmez otomotiv koltuk klflar yapmak için, sv ve tabaka uygulanm elastomerik çat membranlarnda veya klandrmalarda ve tekerlekli sandalye konumlandrma kaylarnn üretimi için neopren-spandeks karmnda kullanlan maskeler için kullanlr. . Kimyasal dayankll ve genel dayankll nedeniyle, neopren, özellikle bulak ykama eldivenlerinin imalatnda, özellikle latekse alternatif olarak kullanlr. Moda olarak, neopren Gareth Pugh, Balenciaga, Rick Owens, Lanvin ve Vera Wang gibi tasarmclar tarafndan kullanlmtr. Cadde tarz blogcularn Moda Bukalemun Jim Joquico’su [14] tarafndan tevik edilen bu trend, 2014 yl ortalarnda genel modaya yöneldi ve damlad.

Önlemler

Baz insanlar neoprene alerjiler gösterirken, dierleri üretimlerinden kalan tioüre kalntlarndan dermatit alabilir. Polikloroprenin vulkanizasyonunda en yaygn hzlandrc, reprotoksik olarak snflandrlan etilen tiyoüredir (ETU). SafeRubber adl Avrupa kauçuk endüstrisi projesi, ETU kullanmna alternatifler üzerinde durdu.

Its typical working temperature range is between -35°C and +100°C.

Styrene-acrylonitrile (SAN)

Styrene and acrylonitrile, in a ratio of approximately 70 to 30, are copolymerized under emulsion, bulk, or solution conditions using free-radical initiators. The copolymer is a rigid, transparent plastic that displays better resistance to heat and solvents than does polystyrene alone. Much of the SAN produced is blended with ABS. Principal uses are in automotive parts, battery cases, kitchenware, appliances, furniture, and medical supplies.

Nitrile rubber (nitrile-butadiene rubber, NBR)

Like SBR, nitrile rubber is a product of synthetic rubber research during and between the two world wars. Buna N, a group of acrylonitrile-butadiene copolymers, was patented in the United States in 1934 by IG Farben chemists Erich Konrad and Eduard Tschunkur. Produced in the United States during World War II as GR-N (Government Rubber-Nitrile), it has become valued for its outstanding resistance to oil.

NBR is prepared in emulsion processes using free-radical initiators. The amount of acrylonitrile present in the copolymer varies from 15 to 50 percent. With increasing acrylonitrile content the rubber shows higher strength, greater resistance to swelling by hydrocarbon oils, and lower permeability to gases-although the glass transition temperature is also raised, with the result that the rubber is less flexible at lower temperatures. The main uses of NBR are in fuel hoses, gaskets, rollers, and other products in which oil resistance is required. It is also employed in textiles, where its application to woven and nonwoven fabrics improves the finish and waterproofing properties.

A hydrogenated version, abbreviated as HNBR, is also highly resistant to thermal and oxidative deterioration and remains flexible at lower temperatures.

Home accessories

Recently, neoprene has become a favorite material for lifestyle and other home accessories including laptop sleeves, tablet holders, remote controls, mouse pads, and cycling chamois. In this market, it sometimes competes with LRPu (low-resilience polyurethane), which is a sturdier (more impact-resistant) but less-used material.

Music

A woman wearing neoprene leggings

The Rhodes piano used hammer tips made of neoprene in its electric pianos, after changing from felt hammers around 1970.

Neoprene is also used for speaker cones and drum practice pads.”4 Great Drum Mutes”. Making Music. February 20, 2015. Retrieved December 7, 2018.

Hydroponic gardening

Hydroponic and aerated gardening systems make use of small neoprene inserts to hold plants in place while propagating cuttings or using net cups. Inserts are relatively small, ranging in size from 1.5 to 5 inches (4 to 13 cm). Neoprene is a good choice for supporting plants because of its flexibility and softness, allowing plants to be held securely in place without the chance of causing damage to the stem. Neoprene root covers also help block out light from entering the rooting chamber of hydroponic systems, allowing for better root growth and to help deter the growth of algae.[citation needed]

Automotive Industry

In automotive industry, neoprene is often used as a material for car seats or car seat covers[13]. Due to being wear-resistant and its protective characteristics, many car makers offer neoprene seats as an option for additional seat protection. Such seat covers are also included into vehicle packages for active drivers. Neoprene is based on a rubber layer for seat protection against moisture.

Other

Neoprene is used for Halloween masks and masks used for face protection, for insulating CPU sockets, to make waterproof automotive seat covers, in liquid and sheet-applied elastomeric roof membranes or flashings, and in a neoprene-spandex mixture for manufacture of wheelchair positioning harnesses. Because of its chemical resistance and overall durability, neoprene is sometimes used in the manufacture of dishwashing gloves, especially as an alternative to latex. In fashion, neoprene has been used by designers such as Gareth Pugh, Balenciaga, Rick Owens, Lanvin and Vera Wang. This trend, promoted by street style bloggers such as Jim Joquico of Fashion Chameleon,[14] gained traction and trickled down to mainstream fashion around 2014.

Precautions

Some people are allergic to neoprene while others can get dermatitis from thiourea residues left from its production. The most common accelerator in the vulcanization of polychloroprene is ethylene thiourea (ETU), which has been classified as reprotoxic. The European rubber industry project called SafeRubber focused on alternatives to the use of ETU.

Civil engineering

Neoprene is used as a load bearing base, usually between two prefabricated reinforced concrete elements or steel plates as well to evenly guide force from one element to another.[

Aquatics

Neoprene is a popular material in making protective clothing for aquatic activities. Foamed neoprene is commonly used to make fly fishing waders and wetsuits, as it provides excellent insulation against cold. The foam is quite buoyant, and divers compensate for this by wearing weights. Thick wet suits made at the extreme end of their cold water protection are usually made of 7 mm thick neoprene.[citation needed] Since foam neoprene contains gas pockets, the material compresses under water pressure, getting thinner at greater depths; a 7 mm neoprene wet suit offers much less exposure protection under 100 feet of water than at the surface. A recent advance in neoprene for wet suits is the “super-flex” variety, which mixes spandex into the neoprene for greater flexibility.[citation needed]

Neoprene waders are usually about 5 mm thick, and in the medium price range as compared to cheaper materials such as nylon and more expensive waterproof fabrics made with breathable membranes.

Polychloroprene Rubber (CR)/ Neoprene

Polychloroprene (CR) Polychloroprene rubber or neoprene has more than 75 years of proven performance in varied industrial applications. Neoprene, an extremely useful synthetic rubber, is the DuPont Performance Elastomer’s trade name for a family of polychloroprene rubber (CR). In other words, polychloroprene is the polymer name for the synthetic rubber known as neoprene. This rubber was developed in 1931 and supposed to be the first specialty elastomer. This is one of the most important types of synthetic rubber with an annual consumption of nearly 300000 tons worldwide. Polychloroprene rubber has a perfect balance of mechanical properties and fatigue resistance which is second only to natural rubber. Neoprene rubber also has superior oil, chemical and heat resistance. This type of rubber (Polychloroprene rubber or Neoprene) is widely used in general engineering applications.

Neoprene Rubber Properties / Properties of Polychloroprene (CR)

Neoprene rubber does not has just one outstanding property, but its balance of properties is unique among the other types of synthetic rubber. The polychloroprene properties can be listed as follows:

Polychloroprene rubber has good mechanical strength.

It is high ozone and weather resistance.

Neoprene also has good aging resistance.

It has low flammability as one of its properties.

It has good chemicals resistance.

Polychloroprene rubber is moderately oil and fuel resistant.

Neoprene rubber properties include its capability of adhesion to many substrates.

Polychloroprene or neoprene rubber can be vulcanized by using various accelerator systems over a varied temperature range.

It is less resistant than natural rubber to low temperature stiffening. This helps in giving improved low temperature resistance.

Polychloroprene rubber can also be used easily with mineral oils, greases, dilute acids and alkalis.

Performance Elastomers

2-klor butadienin polimerizasyonu ile elde edilen CR, kristalizasyona eiliminden dolay, herhangi bir bilesen katlmadan bile tatmin edici mekanik özelliklere sahiptir. Takviye edilmi karmlar, çok iyi kopma dayanmna, anma direncine rezilyans özelliklerine ve tekrarlanan esneme dayanmna sahiptir. Ayn ekilde hava artlarna ve ozona direnci de çok iyidir. Soua dayanm, kristalizasyon özelliine ve cams geçi scaklna (-45ºC) baldr.

Klor atomu sayesinde, CR alifatik karakterli yalara dayanm çok iyidir ve alevi çekince kendi kendine sönme özelliine sahiptir. CR, otomotiv, kimya, inaat ve makine sanayilerinde profil,

hortum, conta, tayc takoz, V kays imalatnda kullanlmaktadr. Kristalleme eilimi

yüksek olanlar yaptrc imalatnda kullanlmaktadr. kloropren monomerinin polimerizasyonu sonucunda üretilen sentetik bir kauçuktur. yi dengelenmi profil özellikleri ile karakterize edilmektedir:

o Hava koullar, güne, ozon ve sürtünmeye kar üstün dayanm,

o Yüksek rezilyans özellii,

o Gaz geçirmezlik,

o Is, ya ve aleve kar dayankllk,

o Düük scaklklarda iyi performans,

o yi elektriksel özellikler

Kullanm alanlar

Lateks dispersiyonlarnn kullanm alanlar;

o Su bazl yaptrclar

o Daldrma yöntemi ile üretilen eldiven ve balon gibi ürünler

o naat sektöründe kullanlan su geçirmez kaplamalar

Kat polikloropren kauçuk kullanm alanlar:

o Solvent bazl yaptrclar

o Titreim sönümleyici motor parçalar

o Kablolar, contalar, toz lastikleri ve szdrmazlk ürünleri

o Kalp ve ekstrüzyon yöntemi ile üretilen ürünler

o Dalgç kyafetleri ve dizüstü bilgisayar klflarnda kullanlan köpük levhalar

o Yol ve köprü yapmnda kullanlan tayc tabakalar

o Genel endüstri ve otomotiv sanayisinde kullanlan kay ve hortumlar

Kauçuk Ticari simleri ve Ksaltmalar

Ana Polimerler ASTM Kodlar Ticari Markalar

Poliakrilat, Akrilik Kauçuk ACM Hytemp, Nipol, Noxtite PA

Etilakrilat Kauçuk AEM Vamac

Poliürethan Kauçuk AU, EU Urepan

Bütil Kauçuk IIR Exxon Butyl,Lanxess Butyl

Cloropren-Neopren Kauçuk CR Baypren, Denka, Skyprene

Epiclorin Kauçuk ECO Hydrin

Etilen Propiten Kauçuk EPDM Keltan, Dutral, Vistalon, Nordel

Florokarbon-Viton Kauçuk FKM Solvay,Viton,Noxtite RE

Nitril Kauçuk NBR Perbunan, Krynac,Kumho,Europrene,Paracril

HNBR Kauçuk HNBR Therban, Zetpol

PVC Li Nitril Kauçuk PVC/NBR Sivic, Europrene ozo

Karboksilli Nitril Kauçuk XNBR Krynac, Nitriflex

Doal-Tabii Kauçuk NR SMR

Sitiren-SRR Kauçuk SBR Petroflex, Kumho ,Kosyn

Silikon Kauçuk VMQ,MQ,PVMQ Wacker, Dow Corning, Momentive,Rhodorsil

Teflon PTFE Flontech , Dyneon

Termoplastik Poliürethan TPU Lubrizol, BASF

Dier Malzemeler ; PA6, PA6.6 , DELRIN , PEI , PPS , ABS, HDPE , PBT , PE , PP, KESTAMID

Formülü CH2=CHCl=CH2 olan, kloropren reçinesi vermek üzere polimerleen, hidrojen atomlarndan bazlarnn klor atomlar ile yerdeitirdii renksiz bir sv.

Polikloropren veya klorobütadien kauçuu olarak da bilinen kloropren kauçuu, dierlerinin yan sra otomotiv endüstrisinde ve s yaltm sporu için kullanlan

sentetik bir kauçuktur. Almanca konuulan ülkelerde jenerik markas neopren ad altnda bilinmektedir. Neoprene, DuPont irketinin ticari markasdr, dier

üreticilerin ticari markalar z’dir. B. Lanxess’in Baypren’i. Hazrlk, 2-kloro-l, 3-bütadien (kloropren) polimerizasyonuyla gerçekletirilir. Kloropren rubberCR

için ksaltma ISO 1043 (1975) ‘dir.

Tarihçe

Temel fikir DuPont’tan Wallace Hume Carothers ile çalan Julius Arthur Nieuwland’dan geliyor. 1930’da Carothers ekibi tarafndan Arnold Collins ilk kez ekonomik olarak uygun koullar altnda bir emülsiyon sürecinde polikloropreni polimerize etti. 1932’de ABD irketi DuPont, ilk önce 1938 ylnda Duprene ad altnda, daha sonra da Neopren adyla polimeri getirdi. Takip eden yllarda, üretim sürecinde ve polimer özelliklerinde çeitli gelimeler olmutur:

1939’da (DuPont) gelimi ilenebilirlik için kükürt (Neopren GN) kopolimerler;

Daha yüksek s direnci ve çözünürlük için 1950’lerde (DuPont) Mercaptan düzenlemeli deikenler;

Seksenlerde (Bayer AG) ksanat modifiye edilmi kloropren kauçuu, vulkanize edilmi ve kristalleme eiliminin azaltlm özellikleri için gelitirilmitir.

imalat

Kloropren kauçuu, emülsiyon polimerizasyonu sürecinde endüstriyel olarak üretilir. Elde edilen dispersiyon asit ilavesiyle çökeltilir, ardndan soutulur, kurutulur ve genellikle ileme endüstrisi için yonga formunda ticariletirilir. Çiplerin yapmasn önlemek için, talk ile pudralanrlar. Ancak, polimer dispersiyonunun kendisi bile bir yapkan olarak kullanlr, bunun için bilinen bir ticari formdur. B. Dispercoll® C ticari ismi altndaki kristalizasyon türleri

Polimerizasyon srasnda monomerin düzenli yaps ve 1,4-trans balantlarnn yüksek oran nedeniyle polikloropren kristallemeye meyillidir, bu ilemden bir süre sonra malzemenin sertlemesine neden olur. Yaptrclar için bu arzu edilir, fakat kauçuk ürünler için daha az tercih edilir. E monomerlerin polimerizasyon scaklklarnn uygun ekilde seçilmesi ve molar kütlenin ayarlanmas için regülatörlerin kullanlmasyla, kristalizasyon eilimi, uygun ekilde istenen yönde etkilenebilir.

Özellikler ve uygulamalar

Bir sörf takm elbise

Çeitli çözücüler için de uygun olan iyi direnç nedeniyle organik çözücüler, polikloropren ve ayrca polimer dispersiyonunun içinde çözülmütür. Vulkanizatlar kimyasal direnç, gevreklemeye kar iyi direnç, ayrma, ozon saldrs ve alev geciktirici özelliklere sahiptir.

Yüksek anilinli, yalar, birçok soutucu akkan ve su içeren (özel karm yapl) mineral yalarda iyi bir ime direnci.

Mineral yalarda orta derecede ime direnci, düük moleküler arlkl alifatik hidrokarbonlar (hafif benzin, izoktan).

Aromatiklerde güçlü ime, örn. Benzen, toluen, klorlu hidrokarbonlar, esterler, eterler, ketonlar.

Karmn bileimine bal olarak -45 ° C ile +100 ° C aras termal uygulama aral (ksa süreli 130 ° C’ye kadar).

Hortumlar, kablo klflar, kalptan çekilmi profiller, kloropren kauçuuna dayanan contalar ve tahrik kaylar, özellikle otomotiv endüstrisinde, elverili özellik kombinasyonunda yanstlmaktadr.

çin bilinen bir uygulama. B. Dal elbisesi için bir malzeme olarak köpüklü vulkanizattr. Vulkanizasyon scaklnn altndaki gazlar serbest brakan kimyasal iirici maddeler kullanlarak, basnca dayankl bir köpük veya köpük kauçuk veya mükemmel yaltm özelliklerine sahip köpük kauçuk elde edilebilir.

Yaptrclar dahil dünya çapnda kloropren kauçuu tüketiminin ylda 300.000 tonun üzerinde olduu tahmin edilmektedir.

vulkanizasyon

Kloropren kauçuu dier birçok doymam elastomerden farkl olarak kükürt ile vulkanize olmaz. Genellikle polikloropren metal oksitlerin vulkanizasyonu için çinko oksit (ZnO) ve magnezyum oksit (MgO) kullanlr. Gelitirilmi su direnci için, çevre koruma nedenleriyle kurun oksit snrl miktarda kullanlabilir. Tipik bir vulkanizasyon hzlandrcs, bir kükürt donörü (kükürt donörü) olarak kullanlan etilen tiyoüredir (ETU ayrca = E thilen T hio U rea). Polikloroprenin ZnO ve MgO tarafndan ETU’nun varlnda vulkanizasyonunda ortaya çkan kimyasal yaplar, sadece yüzde birkaç orannda mevcut olan alilik bal klorin (yukarya bakn: 1,2 birim) reaksiyonundan kaynaklanmaktadr. polimer zinciridir. Çounlukta bulunan vinil-bal klor atomlar (yukarya bakn: 1,4 birim), vulkanizasyon koullar altnda (yaklak 160 ° C) pratik olarak reaksiyona girmezler. Bu nedenle, polikloroprenin çapraz balanma younluu, vulkanize edici maddenin daha fazla ilavesiyle arttrlamaz.

Etilen tiyoüre (ETU) hzlandrclar, vulkanizasyon sürecinin hzlandrlmasnda mevcut endüstri standarddr. Bununla birlikte, ETÜ o zamandan beri çeitli Avrupa otoriteleri tarafndan potansiyel kanserojen olarak snflandrlmtr. Bu maddenin AB tarafndan kullanmnn yakn gelecekte kstlanmas veya yasaklanmas bekleniyor. Kauçuk endüstrisindeki küçük ve orta ölçekli iletmeler (KOB’ler), özellikle daha az sk salk ve güvenlik düzenlemelerine sahip olan Asya ülkelerinden artan rekabet göz önüne alndnda, özellikle zorlanacaktr. Büyük bir konsorsiyum ETU’lar için güvenli bir alternatif bulmak için AB yatrmn kulland. SAFERUBBER bilim adamlar, projenin bir parças olarak çevre dostu ve uygun maliyetli bir alternatif gelitirdiler. SR102 “, birçok önemli faydaya sahiptir: SRM102 kloropren kauçuklar, ak özelliklerine sahiptir ve bu nedenle, kullanlan kauçuk miktarna izin vererek kalplar doldurmak için çok daha kolaydr. ilikili bir azaltma çinko oksit, bir vulkanizasyon aktivatörü olmay reddeder. Avrupa Komisyonu’nun tam raporu için, baknz:

Polikloropren, aadakileri içeren baka polimerlerle harmanlanabilmektedir: maliyetleri azaltmak ve stiren-bütadien kauçuuyla (SBR) düük scaklk esnekliini arttrmak ve maliyeti ve kristallemeyi ve nitril kauçuu (NBR) ile düük scaklk esnekliini arttrmak için doal kauçuk (NR) veya polibütadien (BR) ya direncini artrmak için.

Köpük neopren

Köpüklü neoprende birçok küçük gaz kabarc eit ekilde dalr ve bu da mükemmel s yaltm salar. En iyi bilinen bu su sporlar için souk hava kyafetleri (dalgç kyafetleri, sörf kyafetleri). Ancak ie soutucular, spor bandajlar ve her türlü koruyucu örtü, merdivenler için ses yaltm veya dier gereksinimler köpüklü neoprenden yaplmtr.

Spor giyimi için neopren istenen s yaltmna göre farkl kalnlklarda yaplr. Daha kaln malzeme daha iyi yaltr ancak daha az gerilebilir ve daha yüksek yüzdürme özelliine sahiptir.

Genellikle neopren her iki tarafa da tekstil kuma (naylon veya Lycra) ile lamine edilir, bu da yüzeyi daha kapal ve hasara daha az eilimli hale getirir. Pürüzsüz cilt neopren sadece bir tarafta lamine edilir ve bir tarafta kapal, pürüzsüz bir kauçuk yüzeye sahiptir. Bu malzeme neopren Elbise içindeki eritlerin szdrmazl için uygundur. Lamine elbise modellerine ek olarak, desteksiz de vardr. Özellikle elastiktirler ve suya sk skya uymalar nedeniyle su ve dolaysyla s yaltkandrlar. Avantaj, özellikle büyük bir hareket özgürlüü salayan esneklikte yatmaktadr. Bir dezavantaj, mekanik etkilere kar hassasiyetleridir.

Neopren giysi üretiminde, malzeme darbeye kar tutkallanr.

Köpük neopren

Köpüklü neoprende birçok küçük gaz kabarc eit ekilde dalr ve bu da mükemmel s yaltm salar. En iyi bilinen Neopren (polikloropren)

Neopren sizin için bir elastomer wetsuits’den tanyorum.

Neopren, uluslararas DuPont irketi tarafndan icat edilmitir ve temel olarak DuPont’un ticari markasdr.

Neopren veya polikloropren bir elastomerdir. Hava kabarcklar ile dolu sentetik bir kauçuk malzemedir. Esnek ve hava kabarcklar nedeniyle iyi bir yaltm özelliine sahiptir. Aadakiler dahil çeitli amaçlar için kullanlr: Wetsuits. Malzeme kloroprenin polimerizasyonu ile hazrlanr.

Neopren, hem doal hem de sentetik kauçuktan daha dayankldr. Contalar, hortumlar ve korozyona dayankl kaplamalar gibi zorlu uygulamalar için uygun klan daha etkisizdir (inaktifdir). Yaptrclarda taban, tesisatlarda ses yaltm ve metal emballage astar olarak kullanlabilir. Su sporlar için souk hava kyafetleri (dal kyafetleri, sörf kyafetleri) gibi bu deikendir. Ancak ie soutucular, spor bandajlar ve her türlü koruyucu örtü, merdivenler için ses yaltm veya dier gereksinimler köpüklü neoprenden yaplmtr.

Spor giyimi için neopren istenen s yaltmna göre farkl kalnlklarda yaplr. Daha kaln malzeme daha iyi yaltr ancak daha az gerilebilir ve daha yüksek yüzdürme özelliine sahiptir.

Genellikle neopren her iki tarafa da tekstil kuma (naylon veya Lycra) ile lamine edilir, bu da yüzeyi daha kapal ve hasara daha az eilimli hale getirir. Pürüzsüz cilt neopren sadece bir tarafta lamine edilir ve bir tarafta kapal, pürüzsüz bir kauçuk yüzeye sahiptir. Bu malzeme neopren elbise içindeki eritlerin szdrmazl için uygundur. Lamine elbise modellerine ek olarak, desteksiz de vardr. Özellikle elastiktirler ve suya sk skya uymalar nedeniyle su ve dolaysyla s yaltkandrlar. Avantaj, özellikle büyük bir hareket özgürlüü salayan esnekliktedir. Bir dezavantaj, mekanik etkilere kar hassasiyetleridir.

Neopren giysi üretiminde, malzeme darbeye kar tutkallanr.

Hava koullar, güne, ozon ve sürtünmeye kar üstün dayanm,

Yüksek rezilyans özellii,

Gaz geçirmezlik,

Is, ya ve aleve kar dayankllk,

Düük scaklklarda iyi performans,

yi elektriksel özellikler

Kullanm alanlar

Lateks dispersiyonlarnn kullanm alanlar;

Su bazl yaptrclar

Daldrma yöntemi ile üretilen eldiven ve balon gibi ürünler

naat sektöründe kullanlan su geçirmez kaplamalar

Kat polikloropren kauçuk kullanm alanlar:

Solvent bazl yaptrclar

Titreim sönümleyici motor parçalar

Kablolar, contalar, toz lastikleri ve szdrmazlk ürünleri

Kalp ve ekstrüzyon yöntemi ile üretilen ürünler

Dalgç kyafetleri ve dizüstü bilgisayar klflarnda kullanlan köpük levhalar

Yol ve köprü yapmnda kullanlan tayc tabakalar

Genel endüstri ve otomotiv sanayisinde kullanlan kay ve hortumlar

naat mühendislii

Neopren, genellikle iki prefabrik betonarme eleman veya çelik plaka arasnda bir yük tayc taban olarak kullanlr, ayrca bir elemandan dierine kuvveti eit olarak yönlendirir. [

Su sporlar

Neopren su aktiviteleri için koruyucu giysi yapmnda popüler bir malzemedir. Köpüklü neopren, sinee kar mükemmel bir yaltm saladndan, genellikle olta avlayanlar ve wetsuits’leri yapmak için kullanlr. Köpük oldukça dayankldr ve dalgçlar arlk alarak bunu telafi eder. Souk su korumalarnn en uç noktalarnda yaplan kaln slak giysiler genellikle 7 mm kalnlkta neoprenden yaplr. [Kaynak belirtilmeli] Köpük neopren gaz cepleri içerdiinden, malzeme su basnc altnda sktrlarak daha derinlerde incelir; 7 mm’lik neopren slak elbise, 100 feet su altnda yüzeye göre çok daha az maruz kalma korumas sunar. Islak elbise için neoprendeki son gelimeler, daha fazla esneklik için spandeksini neoprene kartran “süper esnek” çeittir. [Kaynak belirtilmeli]

Neopren tamponlar genellikle yaklak 5 mm kalnlnda ve naylon gibi daha ucuz malzemelerle ve nefes alabilen membranlarla yaplan daha pahal su geçirmez kumalarla karlatrldnda orta fiyat aralnda.

Polikloropren Kauçuk (CR) / Neopren

Polikloropren (CR) Polikloropren kauçuu veya neopren, çeitli endüstriyel uygulamalarda 75 yldan fazla kantlanm performansa sahiptir. Çok kullanl bir sentetik kauçuk olan neopren, DuPont Performance Elastomer’in polikloropren kauçuk (CR) ailesinin ticari addr. Baka bir deyile, polikloropren, neopren olarak bilinen sentetik kauçuun polimer addr. Bu kauçuk 1931 ylnda gelitirilen ve ilk uzmanlk elastomeri olmas gerekiyordu. Bu, dünya çapnda yllk yaklak 300000 ton tüketim tüketen en önemli sentetik kauçuk türlerinden biridir. Polikloropren kauçuu, sadece doal kauçua ikinci olan mükemmel bir mekanik özellik dengesi ve yorulma direncine sahiptir. Neopren kauçuu ayrca üstün ya, kimyasal ve s direncine sahiptir. Bu tip kauçuk (Polikloropren kauçuk veya Neopren) genel mühendislik uygulamalarnda yaygn olarak kullanlmaktadr.

Neopren Kauçuk Özellikleri / Polikloropren (CR) Özellikleri

Neopren kauçuu tek bir olaanüstü özellie sahip deildir, ancak özellik dengesi dier sentetik kauçuk türleri arasnda benzersizdir. Polikloropren özellikleri u ekilde sralanabilir:

Polikloropren kauçuk iyi bir mekanik dayanma sahiptir.

Yüksek ozon ve hava artlarna dayankldr.

Neopren de iyi yalanma direncine sahiptir.

Özelliklerinden biri olarak düük yancla sahiptir.

yi kimyasal dirence sahiptir.

Polikloropren kauçuk, orta derecede ya ve yakt dayankldr.

Neopren kauçuk özellikleri, birçok yüzeye yapma yeteneini içerir.

Polikloropren veya neopren kauçuu, çeitli scaklk aralklarnda çeitli hzlandrc sistemler kullanlarak vulkanize edilebilir.

Doal kauçuktan düük sya sertlemeye kar daha az dirençlidir. Bu, gelitirilmi düük scaklk direncinin verilmesine yardmc olur.

Polikloropren kauçuu ayrca mineral yalar, gresler, seyreltik asitler ve alkalilerle kolayca kullanlabilir.

CHLOROPRENE RUBBER (KLOROPREN KAUCUK) , POLKLOROPRENE ( POLYCHLOROPRENE )

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CHLOROPRENE RUBBER (KLOROPREN KAUCUK) , POLKLOROPRENE ( POLYCHLOROPRENE )

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