Process for improving chloroprene mixed rubber scorching performances

The invention discloses a process for improving chloroprene mixed rubber scorching performances. The mixed rubber comprises, by weight, a masterbatch ingredient comprising 70-100 parts of chloroprene rubber, 1-3 parts of a promoter, 0.5-2 parts of stearic acid, 1-3 parts of protection wax, 1-3.5 parts of an antiager OCT, 20-80 parts of fast extruding furnace black N550, 20-70 parts of semi-reinforcing furnace black N774 and 10-50 parts of dioctyl sebacate, and an auxiliary material ingredient comprising 1-3 parts of an antiager 3100, 1-2.5 parts of an antiager 4010NA and 2-10 parts of a vulcanizing agent. The mixing process comprises 1, initial stage mixing and 2, tail stage auxiliary material addition and mixing. Compared with the existing mixing process, the process provided by the invention improves mixing processes, changes a material use order by prior use of a part of the promoter and later use of all vulcanizing agent and a part of antiagers in masterbatch preparation to improve mixed rubber scorching time, and guarantees a mixed rubber transport and storage period and processing safety.