Patent ID: 7186778

Claim:
A thermoplastic molding composition comprising A) at least one grafted rubber that is a product of free-radical emulsion polymerisation wherein at least one vinyl monomer is polymerized in the presence of at least one rubber a) that is present in the form of a latex, said rubber having a glass transition temperature lower than 0° C., the polymerization being initiated by at least one compound selected from the group consisting of ammonium peroxodisulfate, potassium peroxodisulfate and sodium peroxodisulfate, B) at least one grafted rubber that is a product of free-radical emulsion polymerisation wherein at least one vinyl monomer is polymerized in the presence of at least one rubber b) that is present in the form of a latex, said rubber having a glass transition temperature lower than 0° C., the polymerization being initiated by at least one redox system, and optionally C) at least one thermoplastic, rubber-free polymer that is the product of the polymerisation of at least one resin-forming vinyl monomer, wherein the grafted rubbers A) and B) are prepared separately.