Method of preparation of copolymers of 1,3-butadiene and styrene

Details Method of preparation of copolymers of 1,3-butadiene and styrene Method of preparation of copolymers of 1,3-butadiene and styrene

1996-07-15

1998-08-25

Lipman, Bernard

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253329, 525371, C08F 842

Patent

active

057984190

ABSTRACT:
A method of preparation of copolymers of 1,3-butadiene and styrene, useful for the production of tires or elastic materials, characterized by a reduced rolling resistance without detriment to other properties such as skid resistance. The copolymer is prepared using anionic polymerization of 1,3-butadiene and styrene and coupling of part of the chains in star shape with an appropriate compound of tin or silicon, terminating the remainder of the linear chains without coupling using an appropriately selected different compound. The presence of these linear chains terminated with tin yields a beneficial effect in the reduction of rolling resistance when said product is used in tire formulations. The invention also concerns the copolymers of 1,3-butadiene and styrene obtained by said method.

REFERENCES:
patent: 4526934 (1985-07-01), Oshima et al.

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