Process for preparing a polymeric gloss modifier
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United States of America Patent
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Mar 18, 1997
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N/A
app pub date -
Apr 21, 1994
filing date -
Sep 8, 1992
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Abstract
Polymeric glass modifier having a partially crosslinked structure capable of effectively reducing the surface gloss of a thermoplastic resin, is prepared by (a) emulsion polymerizing an acrylic monomer, an ethylenically unsaturated cyanide compound end, optionally, an aromatic vinyl monomer to obtain a copolymer latex of a linear structure; (b) conducting a crosslinking emulsion polymerization of the resultant linear copolymer latex obtained in step (a) with an addition of the same monomers used in step (a), an acrylamide inter-particle crosslinking agent and an ethylenically unsaturated crosslinking agent to produce a partially crosslinked latex; and (c) coagulating and interparticle crosslinking the partially crosslinked latex obtained in step (b) with an addition of an acid to obtain the polymeric gloss modifier.
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