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AssigneeBayer Aktiengesellschaft
InventorsRudiger Musch, Rudiger Schubart, Wilhelm Gobel, Gottfried Pampus
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A process for the production of storable 2-chloro-1,3-butadiene/sulphur copolymers by peptization using sulphur containing petizing agents, wherein a compound corresponding to the following general formula: R.sub.1 --S.sub.n --R.sub.1 wherein n represents an integer having a value of from 2 to 10, preferably from 3 to 8 and, more particularly, from 4 to 6; and R.sub.1 represents a C.sub.6 -C.sub.14 aryl radical, a C.sub.6 -C.sub.14 aryl-C.sub.1 -C.sub.3 alkyl radical or a heterocycle containing from 1 to 3 hereto atoms, such as N, which may be the same or different and which may optionally be substituted; optionally in combination with a nucleophilic substance, is added to the latex and peptized at from 5.degree. to 100.degree. C. and at pH of from 14 to 3.
A process for producing storable 2-chloro-1,3-butadiene/sulfur copolymer latex by peptization of a highly viscous 2-chloro-1,3-butadiene/sulfur copolymer latex using a sulfur containing peptizing agent wherein as the peptizing agent a compound of the formula R.sub.1 --S.sub.n --R.sub.1 is added to the highly viscous latex of said copolymer after polymerization and the copolymer is peptized at from 5.degree. to 100.degree. C. at a pH of from 14 to 3, n being an integer of from 4 to 6 and R.sub.1 being selected from the group consisting of aryl having 6 to 14 carbon atoms and aralkyl wherein the aryl moiety has from 6 to 14 carbon atoms and the alkyl moiety has from 1 to 3 carbon atoms.
Dependencies are inferred from the claim text.