Alkyl(meth)acrylate-based thermoplastic resin composition and thermoplastic resin with high scratch resistance and low yellowness
AssigneeLG Chem, Ltd.
InventorsHyun Seok Yang, Dae Woo Lee, Han Jong You, Chang Hun Han, Seong Lyong Kim
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Abstract
Disclosed are an alkyl(meth)acrylate-based thermoplastic resin composition and a thermoplastic resin with modified scratch resistance and yellowness. The alkyl(meth)acrylate-based thermoplastic resin composition provides improved scratch resistance and low yellowness index while maintaining transparency, flowability, and impact strength, even when the total content of the vinyl cyan-based monomer contained in the resin composition is reduced to a level unattainable by conventional techniques, and the content of the alkyl(meth)acrylate-based monomer is increased.
Claims17
An alkyl(meth)acrylate-based thermoplastic resin composition comprising:
- a bulk polymer comprising an alkyl(meth)acrylate-based monomer;
- a graft copolymer comprising an alkyl(meth)acrylate-based monomer;
- and
- a phenol-based antioxidant,
- wherein the composition comprises 70 to 90% by weight of the bulk polymer consisting of alkyl(meth)acrylate-based monomer and an aromatic vinyl monomer copolymer, and 10 to 30% by weight of the graft copolymer comprising the alkyl(meth)acrylate-based monomer, an aromatic vinyl monomer, and a vinyl cyan-based monomer present in a single shell grafted onto a core comprising a conjugated diene-based rubber polymer,
- wherein the graft copolymer comprises a vinyl cyan-based monomer in an amount of 0.5 to 2.97% by weight based on the total weight of the composition,
- wherein the phenol-based antioxidant is contained in the thermoplastic resin composition in an amount of 0.5 to 2 parts by weight based on 100 parts by weight of the thermoplastic resin composition, and
- wherein the bulk polymer further comprises 0.01 to 1 parts by weight of an antioxidant based on 100 parts by weight of the total weight of monomers for bulk polymerization.
An alkyl(meth)acrylate-based thermoplastic resin composition comprising:
- a bulk polymer comprising an alkyl(meth)acrylate-based monomer;
- a graft copolymer comprising an alkyl(meth)acrylate-based monomer;
- and
- a phenol-based antioxidant,
- wherein the composition comprises 70 to 90% by weight of the bulk polymer consisting of the alkyl(meth)acrylate-based monomer and an aromatic vinyl monomer copolymer, and 10 to 30% by weight of the graft copolymer comprising the alkyl(meth)acrylate-based monomer, an aromatic vinyl monomer, and a vinyl cyan-based monomer present in a single shell grafted onto a core comprising a conjugated diene-based rubber polymer,
- wherein the graft copolymer comprises a vinyl cyan-based monomer in an amount of 0.01 to 3% by weight based on the total weight of the composition,
- wherein the alkyl(meth)acrylate-based thermoplastic resin has a Yellowness Index of the resin measured in accordance with ASTM E313 is 8 or less,
- wherein the phenol-based antioxidant is contained in the thermoplastic resin composition in an amount of 0.5 to 2 parts by weight based on 100 parts by weight of the thermoplastic resin composition, and
- wherein the bulk polymer further comprises 0.01 to 1 parts by weight of an antioxidant based on 100 parts by weight of the total weight of monomers for bulk polymerization.
Dependencies are inferred from the claim text.