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A Guide to Grades, Compounding and Processing of …
Technical Information Rev. October, 2008 A Guide to Grades, Compounding and Processing of Neoprene Rubber Inherent Properties of NeopreneNeoprene, the world's first fully commercial synthetic elastomer, was introduced by DuPont in 1931. Since then it has established an enviable reputation for reliable service in many demanding applications. Neoprene, made from chloroprene monomers, may be a homopolymer consisting of only cholorprene units or the polymer may be polymerized to contain sulphur and/or 2,3 comonomers such as dichloro 1,3-butadiene. Neoprene is a true multipurpose elastomer thanks to its balance of inherent properties, which include: Outstanding physical toughness Wider short- and long-term operating temperature range than general-purpose hydrocarbon elastomers Resistance to hydrocarbon oils and heat (ASTM D2000/SAE J200 categories BC/BE) Resistance to ozone, sun and weather Better flame retardant/self-extinguishing characteristics than exclusively hydrocarbon-based elastomers As with all elastomers, properties inherent in the base polymer can be enhanced or degraded by Compounding with additional ingredients.
2 Selection of Neoprene Type and Grade The various grades of Neoprene fall within three types, e.g., G, W and T. Within each type there is a series of grades that differ primarily in resistance to crystallization and Mooney viscosity.
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