Flame-resistant polycarbonate molding compositions
First Claim
1. A thermoplastic molding composition comprisingA) 50 to 80 parts by weight of at least one member having weight average molecular weight of 25,000 to 35,000 g/mol, selected from the group consisting of aromatic polycarbonate and polyestercarbonate,B) 7 to 30 parts by weight of ABS graft polymer produced by the mass polymerization process from at least one of acrylonitrile and methacrylonitrile, further butadiene and at least one styrene monomer, said graft polymer(i) having a butadiene content of 11 to 14 % in relation to the weight of the graft polymer, and(ii) having a (meth)acrylonitrile content of 15 to 30 % in relation to the total weight of the (meth)acrylonitrile and styrene monomer in said graft polymer, and(iii) containing styrene monomer-(meth)acrylontrile copolymer having a weight average molecular weight of 5·
- 104 to 14·
104 g/mol.C) 2 to 18 parts by weight of a halogen-free phosphorus compound,D) 0 to 1 parts by weight fluorinated polyolefin,E) 0 to 5 parts by weight of a polymer containing acrylate monomer andF) 0 to 3 parts by weight of an inorganic material in particulate form with an average maximum particle diameter of no more than 1000 nm, said parts by weight totaling 100.
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Accused Products
Abstract
A thermoplastic molding composition having good flame resistance, melt flowability, resistance to chemicals and creep is disclosed. The composition contains A) at least one member having weight average molecular weight (Mw) of 25,000 to 35,000 g/mol, selected from the group consisting of aromatic polycarbonate and polyestercarbonate B) ABS graft polymer produced by the mass polymerization process and characterized in (i) having a butadiene content of 8 to 15% in relation to the weight of the graft polymer, (ii) having an acrylic acid derivative content of 15 to 30% in relation to the total weight of the acrylic derivative and styrene monomer, and (iii) containing styrene monomer-acrylic acid derivative copolymer having a weight average molecular weight of 5·104 to 14·104 g/mol. The composition may further contain one or more of halogen-free phosphorus compounds, fluorinated polyolefin, a polymer containing acrylate monomer and an inorganic material in particulate form.
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Citations
20 Claims
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1. A thermoplastic molding composition comprising
A) 50 to 80 parts by weight of at least one member having weight average molecular weight of 25,000 to 35,000 g/mol, selected from the group consisting of aromatic polycarbonate and polyestercarbonate, B) 7 to 30 parts by weight of ABS graft polymer produced by the mass polymerization process from at least one of acrylonitrile and methacrylonitrile, further butadiene and at least one styrene monomer, said graft polymer (i) having a butadiene content of 11 to 14 % in relation to the weight of the graft polymer, and (ii) having a (meth)acrylonitrile content of 15 to 30 % in relation to the total weight of the (meth)acrylonitrile and styrene monomer in said graft polymer, and (iii) containing styrene monomer-(meth)acrylontrile copolymer having a weight average molecular weight of 5· - 104 to 14·
104 g/mol.C) 2 to 18 parts by weight of a halogen-free phosphorus compound, D) 0 to 1 parts by weight fluorinated polyolefin, E) 0 to 5 parts by weight of a polymer containing acrylate monomer and F) 0 to 3 parts by weight of an inorganic material in particulate form with an average maximum particle diameter of no more than 1000 nm, said parts by weight totaling 100. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- 104 to 14·
Specification