ASA graft copolymer composition
AssigneeLG Chem, Ltd.
InventorsMin Jung Kim, Yong Yeon Hwang, Chun Ho Park, Hye Kyung Han, Sang Mi Lee
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Abstract
Disclosed are an ASA graft copolymer having a structure including a seed which comprises at least one compound of an aromatic vinyl compound, a vinyl cyan compound and an alkyl (meth)acrylate compound, a core which surrounds the seed and comprises alkyl acrylate, and a shell which surrounds the core, comprises an aromatic vinyl compound, a vinyl cyan compound and a crosslinking agent, and having suitably controlled thicknesses and refractive indexes of the respective layers, and an ASA graft copolymer composition comprising the ASA graft copolymer.
Claims7
An ASA graft copolymer composition comprising:
- an ASA graft copolymer comprising a seed, a core and a shell;
- and
- a matrix polymer,
- wherein the ASA graft copolymer has a gel content higher than 85% and a swelling index lower than 8, a difference in refractive index (μD25) between the seed of the ASA graft copolymer and the matrix polymer is lower than 0.06, a difference in the refractive index (μD25) between the core of the ASA graft copolymer and the matrix polymer is higher than 0.05, and a difference in refractive index (μD25) between the shell and the matrix polymer is 0.05 or less,
- wherein the matrix polymer is at least one selected from the group consisting of polycarbonate resin, acrylonitrile-styrene copolymer, polyester resin and vinyl chloride resin,
- wherein a weight ratio of the ASA graft copolymer to the matrix polymer is 1:99 to 20:80,
- wherein the core has a thickness of 20 to 50 nm,
- wherein the core has a size of 230 to 350 nm, and
- wherein the shell of the ASA graft copolymer comprises an aromatic vinyl compound, a vinyl cyan compound and a crosslinking agent.
Dependencies are inferred from the claim text.