Laser marking resin composition
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United States of America Patent
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Jun 2, 1998
Grant Date -
N/A
app pub date -
Oct 18, 1995
filing date -
Oct 21, 1994
priority date (Note) -
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Abstract
A laser marking resin composition excellent in appearance of molded article and impact resistance which comprises: (A) 100 parts by weight of a rubber-reinforced vinyl resin consisting of: (A-1) 1 to 100% by weight of a rubber-reinforced resin having a grafting degree of 5 to 150% by weight obtained by polymerizing, in the presence of (a) 5 to 70% by weight of a rubbery polymer, (b) 95 to 30% by weight of at least one monomer selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, a (meth)acrylic acid ester, maleic anhydride and a maleimide compound, provided that (a)+(b)=100% by weight, and (A-2) 99 to 0% by weight of a polymer obtained by polymerizing at least one monomer selected from the group consisting of an aromatic vinyl compound, a vinyl cyanide compound, a (meth)acrylic acid ester, maleic anhydride and a maleimide compound, provided that (A-1)+(A-2)=100% by weight, the matrix resin in the component (A) having an intrinsic viscosity ?.eta.! of 0.1 to 1.5 dl/g as measured in methyl ethyl ketone at 30.degree. C., and (B) 0.01 to 30 parts by weight of at least one compound selected from the group consisting of (B-1) titanium black, (B-2) black iron oxide, (B-3) yellow iron oxide and (B-4) carbon black.
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