Contact adhesives based on polychloroprene display functioning advantages above alternative adhesive systems in a extensive selection of interrelated applications where quick, high-strength, enduring bonds are needed. A important advantage of contact adhesives is auto-adhesion, which results in an immediate bond with plenty green strength so that fixturing is needless. Contact adhesives can also be formulated to present a long open time before the adhesive-coated substrates are combined. This enables assembly operations to pre-coat or phase the preparation of substrates prior to joining. Chemistry and Manufacture Polychloroprene or chloroprene rubber (CR), introduced by DuPont in 1931, was the earliest synthetic rubber developed that exhibited the elastomeric properties of natural rubber. The new rubber was given the brand name "Duprene" and then renamed Neoprene. It remains one of the most significant speciality elastomers with an annual consumption of 300,000 tons globally.In the production of solid-grade polychloroprene, the latex is coagulated, drawn into a skinny layer, and then chopped and dusted to structure chips or granules.