black masterbatch

Black masterbatch

The black masterbatch as recited in claim 4 where said second polyester polymer is formed from a

dialcohol select ed from the group consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, diethylene glycol, 1,4-dimethylol cyclohexane, 3-methyl-pentanediol, and 2-methyl-hexanediol; and a diacid select ed from the group consisting of malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, 1,4-cyclohexane dicarboxylic acid, p-phthalic acid, and isophthalic acid

A process for the manufacture of an improved masterbatch of synthetic rubber, oil and carbon black wherein a latex of a synthetic C4 -C8 conjugated diolefin polymer containing from 0.2 to about 2.5 weight percent of copolymerized monomer containing reactive groups select ed from one of tertiary amine, hydroxyl and aldehyde, is mixed with an aqueous slurry containing from about 50 parts to about 250 parts by weight per 100 parts by weight of polymer of carbon black and with a stream containing from about 50 parts to about 150 parts by weight per 100 parts by weight of polymer of oil, the mixture is fed to a coagulation vessel and contacted therein with aqueous acidic coagulation agent, the water wet coagulated polymer-oil-black mixture is separated and dried in a drying means to yield the improved masterbatch, the improvement being the addition to and mixing with the polymer in one of the coagulation vessel or the drying means of a crosslinking agent reactive with the reactive groups of the polymer in sufficient amount to react therewith and cause an improvement in the strength and non-flow characteristics of the polymer, said crosslinking agent containing (a) reactive halogen groups when the reactive groups of the polymer are tertiary amine, or (b) aldehyde groups activated by adjacent carbonyl or methoxy groups when the reactive groups

of the polymer are hydroxyl, or (c) hydroxy or mercaptan groups when the reactive groups of the polymer are aldehyde