Patent ID: 8969476
Filing Date: 2015-03-03
Classification: C08F

Abstract:
1. A rubber modified thermoplastic resin composition comprising a discontinuous elastomeric phase, wherein the elastomeric phase is present in an amount of 40 to 94 wt %, based on the total weight of the composition and comprises a polymer having structural units derived from at least one (C 1 -C 12 )alkyl(meth)acrylate monomer and is dispersed in a rigid thermoplastic phase, wherein 5 wt. % to 90 wt. % of the rigid thermoplastic phase is chemically grafted to the elastomeric phase, based on the total amount of rigid thermoplastic phase in the composition, and wherein said thermoplastic phase comprises structural units derived from at least one vinyl aromatic monomer, at least one monoethylenically unsaturated nitrile monomer and at least one (C 1 -C 12 )alkyl- or aryl-(meth)acrylate monomer; where the amount of the vinyl aromatic monomer in the rigid phase is 20 to 60 wt %, where the amount of the monoethylenically unsaturated nitrile monomer in the rigid phase is 10 to 25 wt %, and wherein the elastomeric phase has a bimodal particle size distribution; wherein the elastomeric phase comprises a first mean particle size of less than 160 nm and a second mean particle size in a range of between 200 nm and 750 nm.