Transparent impact-resistant molding material

Claim 1

Transparent, impact resistant molding material which can be processed above 200° C. without recognizable yellowing and odor development, consisting of a mixture of (A) 15 to 70 parts by weight of a methylmethacrylate polymer containing 90 to 100 percent by weight of a methylmethacrylate and 10 to 0 percent by weight of an alkylacrylate having 1 carbon atom to 8 carbon atoms in the alkyl radical, (B) 10 to 50 parts by weight of a styrene/acrylonitrile copolymer containing 78 to 88 parts by weight styrene and 22 to 12 parts by weight acrylonitrile, (C) 20 to 50 parts by weight of a copolymerized graft polymer mixture and (D) additives in an amount from 0 to 20 percent by weight relative to the total of components A, B and C wherein the parts by weight of A, B and C total 100 and where the difference between the refractory index of component C and the refractive index of the mixture of components A, B and D is less than 0.005, wherein the copolymerized graft polymer mixture C is produced by grafting (C 1 ) 50 to 80 percent by weight relative to the copolymerized graft polymer C of a diene elastomeric grafting base having a glass temperature below -20° C. with (C 2 ) 20 to 50 percent by weight consisting of of the following components as a mixture or in sequence: (C 21 ) 40 to 100 parts by weight of one or more methacrylates of C 1 -C 8 alkanols and (C 22 ) 0 to 60 parts by weight of styrene or an alkylstyrene having up to 12 carbon atoms.