Process for the preparation of vinylaromatic (co)polymers...

Details Process for the preparation of vinylaromatic (co)polymers... Process for the preparation of vinylaromatic (co)polymers...

2005-03-07

2011-10-18

Jagannathan, Vasu (Department: 1764)

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

Synthetic resins

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

C525S240000, C525S241000, C525S242000, C525S243000, C525S256000, C525S313000, C525S902000, C526S204000

Reexamination Certificate

active

08039557

ABSTRACT:
A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer in a controlled way, comprising the dissolving of an elastomer, such as polibutadiene, in a mixture consisting of a monomer and of a solvent in the presence of a polymerization catalytic system, which comprises an initiator of free radicals and a stable initiator of free radicals. The mixture obtained in this way is heated to a temperature of about 100° C. to functionalize the rubber, then more monomer is added and the temperature is raised to start the polymerization reaction.

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