| abstract |
An emulsion polymer having at least three phases, adaptable as an agent for modifying the impact resistance of rigid thermoplastic synthetic resins such as polymethyl methacrylate, and consisting of A) a rigid core phase of a crosslinked homo- or copolymer, B) an elastomer phase, prepared in the presence of the core material and having a glass transition temperature not above -10 DEG C., comprising a crosslinked resin which includes an arylalkyl acrylate or arylalkyl methacrylate, and C) a rigid shell phase, prepared in the presence of the elastomer phase, having a glass transition temperature of at least 50 DEG C. |