Patent ID: 7790805

Claim:
A thermoplastic molding composition comprising: (A) at least one polymeric resin selected from the group consisting of polycarbonate, polyester carbonate, polyamide, polyalkylene terephthalate and polyoxymethylene; and (B) a co-precipitated mixture of, (i) a graft polymer B.1 in latex form that is prepared by means of graft copolymerization using a redox initiation system consisting of, an oxidizing agent selecting from the group consisting of di-tert.-butyl peroxide, cumene hydroperoxide, dicyclohexyl percarbonate, tert.-butyl hydroperoxide, p-menthane hydroperoxide, H 2 O 2 and combinations thereof, and a reducing agent selected from the group consisting of salts of sulfinic acid, salts of sulfurous acid, ascorbic acid, and salts of ascorbic acid, sodium formaldehyde sulfoxylate, mono-hydroxyacetone, di-hydroxyacetone, sugars, iron(II) salts, tin(II) salts, titanium(III) salts and combinations thereof, and (ii) a graft copolymer B.2 in latex form that is prepared by means of graft copolymerization using an initiation system consisting of persulfate compounds wherein each of B.1 and B.2 is a product of polymerizations of i) from 5 to 95 wt. % of at least one vinyl monomer with ii) from 95 to 5 wt. % of one or more crosslinked graft bases having glass transition temperatures lower than 10° C.