Thermoplastic compositions based on grafted rubber and polyester, a process for their manufacture, and articles obtained therefrom
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United States of America Patent
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Aug 29, 1989
Issued Date -
N/A
app pub date -
Feb 23, 1988
filing date -
Feb 8, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Thermoplastic composition based on a crystalline polyester and a modified vinyl aromatic polymer. It comprises: from 50 to 97% by weight of at least one polymer phase (A) consisting of at least one terpolymer produced by grafting (a) at least one vinyl aromatic monomer and (b) at least one unsaturated nitrile onto (c) at least one rubber, the terpolymer being dispersed in a matrix of a copolymer comprising units derived from (d) at least one unsatured nitrile and (e) at least one vinyl aromatic monomer, the overall composition of the polymer phase (A) being such that it contains from 17 to 35 parts of unsaturated nitrile, from 10 to 60 parts of rubber, and from 10 to 60 parts of vinyl aromatic monomer per 100 parts by weight of the polymer phase, and from 3 to 50% by weight of at least one high molecular weight polybutylene terephthalate (B).
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