US 11,702,492 B2
Methacrylic resin composition and molded article
Nobuhiro Kobayashi, Tokyo (JP); and Fumiki Murakami, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/52,905
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed May 10, 2019, PCT No. PCT/JP2019/018785
§ 371(c)(1), (2) Date Nov. 4, 2020,
PCT Pub. No. WO2019/221031, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 2018-096368 (JP), filed on May 18, 2018.
Prior Publication US 2021/0238326 A1, Aug. 5, 2021
Int. Cl. C08F 220/10 (2006.01); C08F 220/08 (2006.01); C08K 5/07 (2006.01); C08F 220/06 (2006.01); B29C 45/00 (2006.01); C08K 5/3415 (2006.01); B29K 33/00 (2006.01)
CPC C08F 220/06 (2013.01) [B29C 45/0001 (2013.01); C08K 5/07 (2013.01); C08K 5/3415 (2013.01); B29K 2033/12 (2013.01)] 12 Claims
 
1. A methacrylic resin composition comprising
100 parts by mass of a methacrylic resin comprising 50 to 97% by mass of a methacrylic acid ester monomer unit (A), 3 to 30% by mass of a structural unit (B) having a ring structure in the backbone, and 0 to 20% by mass of an additional vinyl monomer unit (C) copolymerizable with a methacrylic acid ester monomer, and
0.001 to 0.2 parts by mass of a compound (D) represented by the following general formula (1),
the methacrylic resin composition satisfying the following conditions (I) and (II):
(I): a weight-average molecular weight of the methacrylic resin composition as measured by gel permeation chromatography (GPC) is 65,000 to 300,000, and
(II): a mass ratio between the component (D) and the structural unit (B) having a ring structure in the backbone is 25≤(B)/(D)≤1000

OG Complex Work Unit Chemistry
wherein R represents a hydrogen atom, an aliphatic hydrocarbon group having 1 to 12 carbon atoms or an aromatic hydrocarbon group, wherein each carbon atom optionally has a sulfur atom, a nitrogen atom, an oxygen atom, or a phosphorus atom, and
R′ represents an aliphatic hydrocarbon group having 1 to 12 carbon atoms or an aromatic hydrocarbon group having 6 to 18 carbon atoms, wherein each carbon atom optionally has a sulfur atom, a nitrogen atom, an oxygen atom, or a phosphorus atom.