Neoprene TW polychloroprene rubber Dupont Dow Elastomers Rubber - Elastomer >> Chlorinated rubber / Chloroprene, CR ADHESIVE Adhesives Neoprene TW is nonstaining, generalpurpose polychloroprene that contains gel for good processability. Neoprene TW does 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. Compounds of Neoprene TW mix faster and cooler and have good mill release. Neoprene TW is an excellent polymer base for extruded products, providing high extrusion speed, low die swell, excellent definition, and very good collapse resistance. In calendered goods, it produces smooth sheeting with low nerve and shrinkage. The availability of two viscosity grades makes it 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 rate can be varied to suit processing requirements. Vulcanizate Properties Similar to W Types Even though Neoprene TW contains gel polymer, the mechanical properties of its vulcanizates are not greatly different from those of the W types. They also provide the good resistance to heat aging and compression set that is characteristic of the W types. Nonstaining polychloroprene that contains gel for good processability. Does not decrease in molecular weight during mixing and processing and cannot be chemically peptized. Some reduction in viscosity may occur under high shear conditions. Cure accelerators must be used to achieve practical cure rates.