Impact- and weather-resistant thermoplastic polyblends
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United States of America Patent
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Apr 10, 1990
Issued Date -
N/A
app pub date -
Apr 13, 1987
filing date -
Oct 24, 1985
priority date (Note) -
Expired
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Abstract
Thermoplastic polyblends having weatherability and impact strength are formed by blending a first graft copolymer containing a conjugated diene rubber substrate having a weight average particle size between about 0.6 and about 10 microns with a second graft copolymer containing an EPDM-type rubber substrate having a weight average particle size between about 0.05 and about 1 micron or an alkyl acylate rubber substrate having a weight average particle size between about 0.05 and about 0.5 micron. The superstrate of the two graft copolymers comprises a monovinylidene aromatic hydrocarbon and an unsaturated nitrile.
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