US 11,851,558 B2
Methacrylic resin composition, molded article, and method of producing methacrylic resin composition
Ryosuke Okazaki, Ehime (JP); and Makoto Manabe, Ehime (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Filed by SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Filed on Mar. 24, 2021, as Appl. No. 17/210,994.
Claims priority of application No. 2020-056291 (JP), filed on Mar. 26, 2020; and application No. 2020-195056 (JP), filed on Nov. 25, 2020.
Prior Publication US 2021/0301120 A1, Sep. 30, 2021
Int. Cl. C08L 33/10 (2006.01); C08F 220/14 (2006.01)
CPC C08L 33/10 (2013.01) [C08F 220/14 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A methacrylic resin composition comprising a methacrylic resin (A) and a methacrylic resin (B), and satisfying the following requirements (1) to (4):
(1) each of the methacrylic resin (A) and the methacrylic resin (B) has a structural unit derived from a methacrylic acid ester, and a content of the structural unit derived from the methacrylic acid ester contained in the methacrylic resin composition is 98.0% by mass or more with respect to a total content of 100% by mass of all structural units contained in the methacrylic resin composition;
(2) W1 is 10 to 25, in which W1 is a percentage of a peak area from a starting point to a molecular weight of 30,000 to a peak area from the starting point to an end point in a differential molecular weight distribution curve of the methacrylic resin composition;
(3) W2 is 3 to 9, in which W2 is a percentage of a peak area from a molecular weight of 300,000 to the end point to a peak area from the starting point to the end point in the differential molecular weight distribution curve of the methacrylic resin composition; and
(4) a ratio (Mw/Mn) of a mass average molecular weight of the methacrylic resin composition to a number average molecular weight of the methacrylic resin composition is 2.0 to 3.2.