US 12,269,942 B2
Transparent thermoplastic resin composition, production method therefor, molded article obtained by molding transparent thermoplastic resin composition, and production method for molded article
Kazuaki Hirota, Ichihara (JP); Takuya Shibata, Ichihara (JP); Taku Shimozawa, Ichihara (JP); Takayuki Hase, Ichihara (JP); and Takanori Suga, Ichihara (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/635,932
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Aug. 7, 2020, PCT No. PCT/JP2020/030449
§ 371(c)(1), (2) Date Feb. 16, 2022,
PCT Pub. No. WO2021/039368, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-158069 (JP), filed on Aug. 30, 2019; and application No. 2019-158070 (JP), filed on Aug. 30, 2019.
Prior Publication US 2022/0348705 A1, Nov. 3, 2022
Int. Cl. C08L 51/04 (2006.01); C08F 212/08 (2006.01); C08F 220/14 (2006.01); C08F 220/44 (2006.01); C08F 279/02 (2006.01); C08F 279/06 (2006.01); C08J 3/12 (2006.01); C08K 5/13 (2006.01); C08K 5/5373 (2006.01); C08L 33/10 (2006.01); C08L 51/00 (2006.01)
CPC C08L 51/04 (2013.01) [C08F 212/08 (2013.01); C08F 220/14 (2013.01); C08F 220/44 (2013.01); C08F 279/02 (2013.01); C08F 279/06 (2013.01); C08J 3/12 (2013.01); C08K 5/13 (2013.01); C08K 5/5373 (2013.01); C08L 33/10 (2013.01); C08L 51/003 (2013.01)] 12 Claims
 
1. A transparent thermoplastic resin composition comprising:
based on 100 parts by mass of the transparent thermoplastic resin composition,
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);
40 to 90 parts by mass of a vinyl copolymer (B) obtained by copolymerizing a monomer mixture (b) containing at least an aromatic vinyl-based monomer (b1) and a (meth)acrylic acid ester-based monomer (b2);
100 to 1,000 ppm of a phenolic compound (C); and
a dihydrooxaphosphaphenanthrene-based phosphorus compound (D),
wherein a molar ratio (P/OH) of a phosphorus atom (P) of the dihydrooxaphosphaphenanthrene-based phosphorus compound (D) to a hydroxyl group (OH) of the phenolic compound (C) is 0.2 to 5.0, and
a content of a (meth)acrylic acid ester-based monomer-derived unit is 30 mass % or more and 75 mass % or less, based on 100 mass % of a total of a diene-based monomer-derived unit, a (meth)acrylic acid ester-based monomer-derived unit, an aromatic vinyl-based monomer-derived unit, a vinyl cyanide-based monomer-derived unit, and another vinyl-based monomer-derived unit contained in the transparent thermoplastic resin composition.