Polycarbonate molding materials containing graft rubber
First Claim
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1. Polycarbonate compositions containing A) 5 to 95 parts by wt. of aromatic polycarbonate, B) 1 to 50 parts by wt. of at least one graft rubber, which can be obtained by emulsion polymerisation of styrene and acrylonitrile in the weight ratio 90:
- 10 to 50;
50, wherein styrene and/or acrylonitrile may be replaced wholly or partly by α
-methylstyrene, methyl methacrylate or N-phenylmaleinimide, in the presence of at least two rubber latices of type (B1) and (B2) which contain in each case 0 wt. % to 50 wt. % of a further vinyl monomer in copolymerised form, and wherein the weight ratio of monomers used to rubber latices used is 25;
75 to 70;
30, characterised in that the rubber latex (B1) has a particle diameter d50 of ≦
350 nm, a particle size distribution range (measured as d90-d10 from the integral particle size distribution) from 30 nm to 100 nm, and a gel content of ≦
70 wt. %, and the rubber latex (B2) has a particle diameter d50 of ≧
350 nm, a particle size distribution range (measured as d90-d10 from the integral particle size distribution) from 50 nm to 500 nm, and a gel content of ≧
70 wt. %, and the difference in the average particle diameter of B1 and B2 is ≧
50 nm, C) 0 to 50 parts by wt. of at least one thermoplastic homo-, co- or terpolymer containing at least one monomer selected from the group comprising styrene, α
-methylstyrene, acrylonitrile, methyl methacrylate and N-substituted maleinimide, and optionally D) 0.5 to 25 parts by wt. of at least one flame retardant as well as optionally conventional additives, the sum of the parts by weight of the components totalling 100.
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Abstract
The present invention relates to thermoplastic polycarbonate/graft polymer moulding compositions with improved mechanical properties (particularly impact strength and elongation at break) and improved processing performance (flow properties).
9 Citations
19 Claims
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1. Polycarbonate compositions containing
A) 5 to 95 parts by wt. of aromatic polycarbonate, B) 1 to 50 parts by wt. of at least one graft rubber, which can be obtained by emulsion polymerisation of styrene and acrylonitrile in the weight ratio 90: - 10 to 50;
50, wherein styrene and/or acrylonitrile may be replaced wholly or partly by α
-methylstyrene, methyl methacrylate or N-phenylmaleinimide, in the presence of at least two rubber latices of type (B1) and (B2) which contain in each case 0 wt. % to 50 wt. % of a further vinyl monomer in copolymerised form, and wherein the weight ratio of monomers used to rubber latices used is 25;
75 to 70;
30, characterised in that the rubber latex (B1) has a particle diameter d50 of ≦
350 nm, a particle size distribution range (measured as d90-d10 from the integral particle size distribution) from 30 nm to 100 nm, and a gel content of ≦
70 wt. %, and the rubber latex (B2) has a particle diameter d50 of ≧
350 nm, a particle size distribution range (measured as d90-d10 from the integral particle size distribution) from 50 nm to 500 nm, and a gel content of ≧
70 wt. %, and the difference in the average particle diameter of B1 and B2 is ≧
50 nm,C) 0 to 50 parts by wt. of at least one thermoplastic homo-, co- or terpolymer containing at least one monomer selected from the group comprising styrene, α
-methylstyrene, acrylonitrile, methyl methacrylate and N-substituted maleinimide, and optionallyD) 0.5 to 25 parts by wt. of at least one flame retardant as well as optionally conventional additives, the sum of the parts by weight of the components totalling 100. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- 10 to 50;
Specification
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Current AssigneeBayer Materialscience AG (Covestro AG)
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Original AssigneeBayer AG
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InventorsWittmann, Dieter, Eckel, Thomas, Eichenauer, Herbert, Warth, Holger
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current525/67
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CPC Class CodesC08F 279/02 on to polymers of conjugate...C08F 279/04 Vinyl aromatic monomers and...C08L 2666/02 Organic macromolecular comp...C08L 2666/14 Macromolecular compounds ac...C08L 51/04 grafted on to rubbersC08L 55/02 ABS [Acrylonitrile-Butadien...
