Matte thermoplastic resin composition
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United States of America Patent
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Dec 24, 1991
Grant Date -
N/A
app pub date -
Nov 3, 1988
filing date -
Nov 6, 1987
priority date (Note) -
Expired
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Abstract
A matte thermoplastic resin composition consisting essentially of: (A) 70-97% by weight of a rubber-modified alkenyl a romatic thermoplastic resin and (B) 30-3% by weight of a graft copolymer as a high polymer modifier for matting, obtained by polymerizting an ethylenically unsaturated carboxylic acid and at least one monomer selected from the group consisting of an alkenyl aromatic compound, an alkenyl cyanide compound and other copolymerizable alkenyl monomer in the presence of a rubbery polymer latex, wherein the content of the ethylenically unsaturated carboxylic acid component in the graft copolymer (B) is 1-30% by weight and the content of the rubbery polymer in the graft copolymer (B) is 10-60% by weight. Said composition has an excellent matte effect especially when the rubbery polymer latex gives a percentage coagulation of 20% by weight or less based on the total solids of the latex when 15% by weight, based on the total solids, of methacrylic acid is added to the latex.
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