Patent ID: 8013063
Filing Date: 2011-09-06
Classification: C08F,C08G,C08L,Y10S

Abstract:
1. An acryl-silicone hybrid impact modifier having improved impact resistance and coloring property comprising: (A) an acryl seed latex, (B) a core comprising (C) a graft shell placed on the continuous acryl rubber core of (B)(i) having the discrete silicone rubber core of (B)(ii) therein, and the discrete silicone rubber core of (B)(ii) placed onto the continuous acryl rubber core of (B)(i); wherein the continuous acryl rubber core of B(i) is prepared by emulsion polymerization reaction between 0.01 to 10 parts by weight of the acryl seed latex of (A), 57.07 to 79.40 parts by weight of an alkyl acrylate having an alkyl group of 1 to 8 carbon atoms, and 0.43 to 0.60 parts by weight of a cross-linking monomer, based on the weight of the entire impact modifier, wherein the discrete silicone rubber core of (B)(ii) is prepared by swelling a cyclic organosiloxane precursor of: in the acryl rubber core, then condensing the swells with an acid catalyst selected from the group consisting of alkylbenzene sulfonic acid and alkylsulfonic acid, wherein the glass transition temperature of the core is −120° C. to 25° C., and wherein the graft shell of (C) is prepared by emulsion graft polymerization reaction of 60 to 94 parts by weight of the core (B), 7.5 to 20 parts by weight of an alkyl methacrylate having an alkyl group of 1 to 4 carbon atoms, and 0.1 to 20 parts by weight of one or more compounds selected from the group consisting of methylacrylate, ethylacrylate, butylacrylate, acrylonitrile, and methacrylonitrile, based on the weight of the entire impact modifier.