Process for manufacture of polymer compositions containing a polyvinylarene and EPDM rubber.

Laurent N.I.H. Nelissen (Inventor), G.J.M. de Koning (Inventor), Joop M. Zijderveld (Inventor)

    Research output: PatentPatent publication

    Abstract

    A process for the manufacture of polymer com­ positions containing a polyvinylarene and EPDM rub­ ber, which process comprises:
    (a) dissolving in at least one vinylarene monomer of from 8 to 20% by weight, and preferably from 9 to 18% by weight, relative to the final composi­ tion, of at least one EPDM rubber, optionally mixed with a linear (hydrogenated) conjugated diene-vinylarene block copolymer, said block copolymer having a number average molecular weight in the range of from 10,000 to 1,000,000;
    (b) prepolymerizing the obtained solution until a polymerization degree of from 0.01 to 25%;
    (c) suspending the prepolymerized mass into an aqueous medium which contains at least one sus­ pending agent; and
    (d) suspension polymerizing until substantially complete monomer conversion is obtained, op­ tionally in the presence of an expanding agent, and polymer compositions so obtained.
    Original languageEnglish
    Patent numberEPO0476753
    Priority date20/09/90
    Filing date10/09/91
    Publication statusPublished - 25 Mar 1992

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