RUBBER COMPOSITION AND USE THEREOF IN IMPACT-RESISTANT PLASTIC Russian patent published in 2012 - IPC C08F136/06 C08L53/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a rubber composition for use in a mixture with impact-resistant plastic, a method of preparing a mixture of polymer composition and impact-resistant plastic, as well as a composition of impact-resistant plastic. The rubber composition for use in a mixture with impact-resistant plastic contains a polymer obtained by polymerising at least one conjugated diene in the presence of an anionic initiator and a viscosity-reducing additive. Said polymer contains carboxylate terminal groups formed by adding carbon dioxide to break polymerisation chains and has Mooney viscosity ML₁₊₄ greater than approximately 35 and solution viscosity X, where X is greater than approximately 75 cP. The viscosity-reducing additive has polymer solution viscosity from X to 0.4X-0.58X.

EFFECT: obtaining polymers with improved strength properties for use in impact-resistant plastic, as well as use of an additive which reduces polymer solution viscosity while maintaining high bulk viscosity.

28 cl, 5 tbl