Production Method of Chloroprene Rubber

1) Formulation: Refined chloroprene is dried and cooled, then metered into an oil phase preparation vessel. Sulfur is added according to the formula, and after dissolution, rosin is added to prepare the oil phase. An aqueous phase is prepared using softened water, sodium hydroxide, and a dispersant. Simultaneously, initiator and terminator solutions are prepared.

2) Polymerization: The oil and aqueous phases are mixed and emulsified in an emulsifying vessel, then fed into a polymerization vessel. An initiator solution is added, and polymerization is carried out at 35-45 °C for 2-2.5 hours.

3) Termination and Chain Breaking: When the relative density of the latex reaches 1.068, the polymerization reaction is terminated by the main latex terminator. The latex is then placed in a chain-breaking tank, where chain breaking occurs in an alkaline medium. The endpoint is controlled by plasticity.

4) Coagulation and Drying: The chain-broken latex is fed into a coagulation tank, where it reacts with a coagulant composed of sodium chloride and calcium chloride, causing the rubber to precipitate as small particles. After washing, extrusion dehydration, drying, powdering, cutting, and packaging, the finished product is obtained.