Patent ID: 8647739
Filing Date: 2014-02-11
Classification: C08L,Y10T

Abstract:
1. An acrylic resin composition comprising a PMMA matrix having a glass transition temperature of greater than 0° C., having dispersed therein an acrylic block copolymer of general formula (A) m -(B) p -I, p being an integer greater than or equal to 2, m being an integer less than or equal to p, B being a polymer block bonded directly to the core I by a covalent bond, obtained by polymerizing a mixture of monomers (B 0 ) containing at least 60% by weight of acrylic monomers (b 1 ), A being a polymer block, bonded directly to the B block by a covalent bond, obtained by polymerizing a mixture of monomers (A 0 ) containing at least 60% by weight of methacrylic monomers (a 1 ), the core (I) being an organic group corresponding to one of the following formulae: where Ar denotes a substituted aromatic group, Z is a polyfunctional organic or inorganic radical having a molecular weight greater than or equal to 14, n being greater than or equal to 2, wherein said acrylic resin composition comprises from 60 to 80% by weight of said PMMA matrix, and from 20 to 40% by weight of said block copolymer.