Patent ID: 8969474
Filing Date: 2015-03-03
Classification: C08F,C08L,Y10T

Abstract:
1. A thermoplastic acrylic resin composition, comprising: a methacrylic resin (A) comprising 80 to 99.9% by mass of alkyl methacrylate units and 0.1 to 20% by mass of alkyl acrylate units and having a weight-average molecular weight (Mw) of 40,000 or more; and a polyvinyl acetal resin (B) comprising repeating units represented by formula (1) below: wherein R 3 is an alkyl group having 2 or less carbon atoms or a hydrogen atom, R 4 is an alkyl group having 3 or more carbon atoms, l is a mole fraction of vinyl alcohol units and m is a mole fraction of vinyl acetate units, k 3 is a mole fraction of vinyl alcohol units acetalized by an aldehyde having 3 or less carbon atoms, and k 4 is a mole fraction of vinyl alcohol units acetalized by an aldehyde having 4 or more carbon atoms, and a ratio of (k 3 +k 4 )/(k 3 +k 4 +l+m) is from 0.65 to 0.85, and a ratio of k 4 /k 3 is from 90/10 to 1/99.