Chloroprene rubber, Neoprene

Chloroprene rubber (Neoprene—trade name of DuPont) was one of the earliest synthetic rubbers, first commercialized in 1932. It has a wide range of useful properties but has not become a true general purpose synthetic rubber, probably because of its cost. It does possess properties superior to those of a number of general purpose polymers, such as oil, ozone, and heat resistance but for these properties other specialized polymers excel. Polychloroprene thus is positioned between the general purpose elastomers and the specialty rubbers. 

Details A solid, which is an accelerator and vulcanising agent for chloroprene rubber (Neoprene) and polyacrylate rubber. 

Fig. 3. Diffusion coefficients of nitrogen in diene rubbers and in butyl rubber as a function of T - Tg (Data from Ref 104). H Chloroprene rubber (neoprene) styrene butadiene rubber B natural rubber B nitrile butadiene rubber B butyl rubber.

Chlorobutadiene or chloroprene rubbers (CRs), also called neoprene rubbers, are usually vulcanized by the action of metal oxides. The cross-linking agent is usually zinc oxide in combination with magnesium oxide [27]. CR can be vulcanized in the presence of zinc oxide alone, but magnesium... 

Uses Its largest uses are for polymeriztion to polybutadiene and copolymerization with styrene to make synthetic rubber (SBR) for tires and other rubber uses. Other uses include the preparation of chloroprene for oil-resistant rubber (neoprene) and hexamethylenediamine for the preparation of nylon. 

Neoprene or chloroprene rubber and pressed fabrics are suitable for gaskets Neoprene or chloroprene rubber and pressed fabrics are suitable for gaskets... 

Natural rubber is resistant to dilute mineral acids, alkahes, and salts, but oxidizing media, oils, and most organic solvents will attack it. Hard rubber is made by adding 25 percent or more of sulfur to natural or synthetic rubber and, as such, is both hard and strong. Chloroprene or neoprene rubber is resistant to attack by ozone, sunlight, oils, gasoline, and aromatic or halogenated solvents but is... 

This is the preferred designation for all chloroprene polymers and copolymers. Chloroprene rubber was first introduced commercially in 1931 by DuPont and their trade name, originally DuPrene, later Neoprene, has almost become a generic term for all such rubber. See Chlorobutadiene. 

Fig. 17. Polymerization of monomers by synthetic rubber mastication. 1 13.8% methyl methacrylate in neoprene. 2 13.6% chloroprene in neoprene. 3 13.8% methyl methacrylate in polybutadiene-styrene. 4 13.6% chloroprene in polybutadiene-styrene. 5 14.5% styrene in polybutadiene-arylonitrile. c indicates that the rubber became a crumb at approximately the arrowed time of mastication. 6 11% methyl methacrylate in rubber — from Table X in original...

OTHER COMMENTS an oil-resistant synthetic rubber (neoprene) may be made by the polymerization of chloroprene used as a component of adhesives intended for use in food packaging used for roof coatings used for wire and cable jackets. 

ALTERNATIVE NAMES. ACRONYMS, TRADE NAMES Poly(l-chloro-l-butenylene), poly(2-chloro-1.3-butadiene), chloroprene rubber (CR), GR-M, Baypren, Butaclor , Neoprene, Perbunan C, Skyprene... 

Synonyms 1,3-Butadiene, 2-chloro-, polymers 2-Chloro-1,3-butadiene homopolymer Chlorobutadiene polymer 2-Chloro-1,3-butadiene polymer Chloroprene polymer Chloroprene resin Chloroprene rubber CR Neoprene Neoprene rubber Poly (2-chlorobutadiene) Poly (2-chloro-1,3-butadiene) Poly (chloroprene)... 

Chloro-1,3-butadiene (chloroprene) was originally synthesized in 1930. The material can polymerize spontaneously to an elastomer that has good resistance to oil and weathering. Commercial production of chloroprene rubber started in 1932. Since then, many types of polymers and copolymers were developed with the trivial generic name of neoprene. 

Chloroprene rubber, polychloroprene (CR). A syniheXic rubber produced by polymerization of chloroprene (2-chlorobutadiene, CH2=CCl—CH = CH 2). High weather and chemical resistance, better oil resistance than that of natural rubber products. Some applications building sheets, belts, cable insulations, technical rubber goods, contact adhesives. Trade names Baypren (FRG), Neoprene (USA). 

Chloroprene or Neoprene Rubber (CR). Chloroprene rubber (poly-2-chlorob-utadiene) is produced by the emulsion polymerization of 2-chlorobutadiene, in the presence of a free-radical initiator. Its general chemieal structure can be represented as... 

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