Graft copolymer and thermoplastic resin composition
View Patent ↗A thermoplastic resin composition comprising 10 to 98 parts by weight of a graft polymer (1A) containing a rubber-like polymer (1G) having a diene unit content of 50% by weight or less, 2 to 50 parts by weight of a hydroxyl group-containing acrylic copolymer (1B) and 0 to 80 parts by weight of other thermoplastic resin (1F), wherein the rubber-like polymer (1G) is at least one selected from the group consisting of a diene-based rubber, a polyorganosiloxane-based rubber and an olefin-based rubber; and, a graft copolymer (2A) obtained by grafting a vinyl-based polymer to a (meth)acrylate-based rubber-like polymer (2G) expansion-treated with an acid group-containing copolymer latex (2K) wherein the (meth)acrylate-based rubber-like polymer contains two or more poly-functional monomer units.
1. A molded article, comprising a thermoplastic resin composition, which comprises:
(i) 5 to 95% by weight of a graft copolymer comprising
a vinyl-based monomer unit having a hydroxyl group,
said graft copolymer being obtained by
grafting a vinyl-based polymer to a (meth)acrylate-based rubber polymer treated with an acid group-containing copolymer latex to increase particle size,
wherein the (meth)acrylate-based rubber polymer comprises two or more monomer units having at least two double bonds, and said monomer units being based on an allyl compound and a di(meth)acrylate compound;
wherein the (meth)acrylate-based rubber polymer comprises
a non-expanded small particle size (meth)acrylate-based rubber polymer in a ratio of 15% by weight or less,
(ii) 95 to 5% by weight of a thermoplastic resin, and
(iii) 0 to 50% by weight of a second graft copolymer,
wherein the total amount of (i), (ii) and (iii) is 100% by weight, and
said molded article is in the form of a sheet, and the surface glossiness (incident angle: 60°) is 50% or less.
2. The molded article according to claim 1 , wherein the (meth)acrylate-based rubber polymer comprises
an alkyl (meth)acrylate unit having an alkyl group of 1 to 12 carbon atoms in an amount of 50% by weight or more.
3. The molded article according to claim 1 , wherein the treated (meth)acrylate-based rubber polymer has a weight-average particle size of from 200 to 1000 nm.
4. The molded article according to claim 1 , wherein the grafted vinyl-based polymer comprises
at least one polymer comprising at least one monomer unit selected from the group consisting of a (meth)acrylate-based compound monomer unit, a vinyl cyanide-based compound monomer unit and an aromatic alkenyl-based compound monomer unit.
5. The molded article according to claim 1 , wherein the (meth)acrylate-based rubber polymer comprises
a vinyl-based monomer unit having a hydroxyl group.
6. The molded article according to claim 1 , wherein said vinyl based polymer contains a hydroxyl group.
7. The molded article according to claim 1 , wherein the thermoplastic resin is at least one polymer selected from the group consisting of polymethyl methacrylate, acrylonitrile-styrene copolymer, acrylonitrile-styrene-N-substituted maleimide ternary copolymer, styrene-maleic anhydride-N-substituted maleimide ternary copolymer, polycarbonate resin, polybutylene terephthalate, polyethylene terephthalate, polyvinyl chloride, polystyrene, methyl methacrylate-styrene copolymer, acrylonitrile-styrene-methyl methacrylate copolymer, modified polyphenylene ether and polyamide.
8. A molded article, obtained by
laminating the molded article of claim 1 , with the thermoplastic resin,
wherein said molded article is in the form of a multi layer sheet.