US 12,258,431 B2
Transparent thermoplastic resin composition and article molded thereof
Takuya Shibata, Ichihara (JP); Takanori Suga, Ichihara (JP); and Takayuki Hase, Ichihara (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/626,366
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed May 22, 2020, PCT No. PCT/JP2020/020263
§ 371(c)(1), (2) Date Jan. 11, 2022,
PCT Pub. No. WO2021/014735, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 2019-133845 (JP), filed on Jul. 19, 2019.
Prior Publication US 2022/0259359 A1, Aug. 18, 2022
Int. Cl. C08F 279/06 (2006.01); C08L 25/12 (2006.01); C08L 25/14 (2006.01); C08L 83/04 (2006.01)
CPC C08F 279/06 (2013.01) [C08L 25/12 (2013.01); C08L 25/14 (2013.01); C08L 83/04 (2013.01); C08L 2201/10 (2013.01); C08L 2203/30 (2013.01); C08L 2205/03 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A transparent thermoplastic resin composition comprising:
100 parts by mass of a transparent thermoplastic resin composition composed of
10 to 60 parts by mass of a graft copolymer (A) obtained by graft-copolymerizing a monomer mixture (a) containing at least an aromatic vinyl-based monomer (a1) and a (meth)acrylic acid ester-based monomer (a2) in the presence of a rubbery polymer (r), and
40 to 90 parts by mass of a vinyl-based copolymer (B) obtained by copolymerizing a monomer mixture (b) containing at least an aromatic vinyl-based monomer (b1), a (meth)acrylic acid ester-based monomer (b2), and a vinyl cyanide-based monomer (b3); and
15 ppm or more and 40 ppm or less of a polydimethyl siloxane gum (C) having a weight-average molecular weight of 300,000 or more.