Thermoplastic moulding compounds

Details Thermoplastic moulding compounds Thermoplastic moulding compounds

C - Chemistry, Metallurgy

08

L

400/2048

C08L 69/00 (2006.01) C08L 25/08 (2006.01) C08L 33/00 (2006.01) C08L 51/04 (2006.01) C08L 55/02 (2006.01)

Patent

CA 1146295

THERMOPLASTIC MOULDING COMPOUNDS Abstract of the Disclosure Thermoplastic moulding compounds of 1.) 70 - 30 parts by weight of a thermoplastic polycarbonate based on dihydroxy- diarylalkanes, including those which carry chlorine, bromine or methyl groups in the ortho-position to the hydroxyl group and 2.) 30 - 70 parts by weight of a mixture of 25 to 100 % by weight of graft copolymers obtained from monomers polymerised on a rubber and 0 to 75 % by weight of a copolymer of 95 to 50 % by weight styrene, .alpha.-methylstyrene, methyl methacrylate or mixtures thereof and 50 to 5 % by weight of acrylonitrile, methacrylonitrile, methyl methacrylate or mixtures thereof, wherein the graft copolymers used are a mixture of a) a graft copolymer of from 50 to 95 % by weight, preferably from 50 to 70 % by weight of a mixture of the monomers styrene and acrylonitrile (in proportions by weight of from 50 : 50 to 95 : 5) or from 5 to 50 % by weight, preferably from 30 to 50 % by weight of a rubber having an average particle size of from 0.1 to 2 µ, preferably from 0.3 to 1 µ, with a-degree of grafting of from 0.2 to 0.5, and b) a graft copolymer of from 40 to 10 % by weight, preferably from 35 to 20 % by weight of a mixture of the monomers styrene and acrylo- nitrile (in proportions by weight of from 50 : 50 to 95 : 5) and 60 to 90 % by weight, preferably 65 to 80 % by weight of a rubber having an average particle size of from 0.1 to 2 µ, preferably from 0.3 to 1 µ, with a degree of graft- ing of from 0.7 to 0.9, the moulding compound containing the graft copolymers a) and b) in proportions by weight of from 1 : 3 to 3 : 1 and having a rubber content of from 10 to 25 % by weight, preferably from 15 to 20 % by weight. Le A 18 745

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