Neoprene WRT polychloroprene rubber Dupont Dow Elastomers Rubber - Elastomer >> Chlorinated rubber / Chloroprene, CR ADHESIVE Adhesives Non-staining crystallization-resistant copolymer of chloroprene and 2,3-dichloro-1,3-butadiene. Neoprene WRT is designed for use in finished products that must remain flexible for long periods at low temperatures. The good crystallization resistance of these types helps counteract the increase in rate of crystallization-induced stiffening that is caused by ester plasticizers. Therefore, higher levels of ester plasticizers can be tolerated for increased resistance to thermal stiffening. Neoprene WRT synthetic rubbers do not decrease in molecular weight during mixing and processing and cannot be chemically peptized. However, some reduction in viscosity may occur under high shear conditions due to disentangling of polymer chains. Compounds of Neoprene WRT mix rapidly, develop few heat during mixing, have good mill release, and yield extrudates that are resistant to distortion. possible to accommodate considerable variation in filler and plasticizer loading while still maintaining workable compound viscosity. Because cure accelerators must be used with these types to achieve practical cure rates, processing safety and cure rates can be varied to suit processing requirements. Non-staining crystallization-resistant copolymer of chloroprene and 2,3-dichloro-1,3-butadiene. Used in finished products that must remain flexible for long periods at low temperatures. Cure accelerators must be used to achieve practical cure rates.