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US 6,441,068 B1Granted
Flame-resistant reinforced polycarbonate ABS moulding materials
AssigneeBayer Aktiengesellschaft
InventorsThomas Eckel, Dieter Wittmann, Bernd Keller, Heinrich Alberts
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Abstract
A flame-resistant, reinforced thermoplastic molding composition characterized by its improved properties is disclosed. The composition contains A) a mixture of two aromatic polycarbonate resins that differ one from the other in terms of their relative solution viscosities, B) an optional vinyl (co)polymer containing at least one ethylenically unsaturated monomer, C) a graft polymer, D) a phosphorus compound, E) fluorinated polyolefin, and F) inorganic reinforcing material.
Claims13
A flame-proof, reinforced thermoplastic molding composition consisting essentially of:
- A. 5 to 95 parts by weight of a mixture of two aromatic polycarbonates A.1 and A.2 with different solution viscosity, wherein
- 1. the relative solution viscosity of A.1 is 1.18 to 1.24,
- 2. the relative solution viscosity of A.2 is 1.24 to 1.34 and
- 3. the difference between the relative solution viscosities of A 1 and A.2 is not less than 0.06, the relative solution viscosities of A.1 and A.2 being measured in CH2Cl2 at 25°C. and at a concentration of 0.5 g/100ml,
- wherein one or more further polycarbonates may be added to the mixture of A.1 and A.2;
- B. 0 to 50 parts by weight of vinyl (co)polymer consisting of one or at least two ethylenically unsaturated monomers selected from styrene, α-methylstyrene, ring-substituted styrenes, acrylonitrile, methacrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleinimides and (meth)acrylatic acid esters with 1 to 18 carbon atoms in the alcohol component;
- C. 0.5 to 60 parts by weight of graft polymer obtainable by graft polymerization of at least two of the monomers selected from chloroprene, butadiene, isoprene, styrene, acrylonitrile, ethylene, propylene, vinyl acetate and (meth)acrylic acid-C1-C18-alkyl ester;
- D. 0.5 to 20 parts by weight of phosphorus compound of formula (I)
- in which
- R1, R2, R3 and R4 independently of each other mean optionally halogenated C1-C4-alkyl in each case, C5-C6-cycloalkyl, C6-C20-aryl or C7-C12-aralkyl, optionally substituted by halogen and/or C1-C4-alkyl in each case,
- n independently of each other means 0 or 1,
- N means 0 to 30, and
- X means a mono- or polynuclear aromatic group with 6 to 30 C atoms;
- E. 0.05 to 5 parts by weight of at least one fluorinated polyolefin;
- and
- F. 1 to 40 parts by weight of inorganic reinforcing material selected from glass fibers, cut glass fibers, ground glass fibers and mixtures thereof
- wherein the sum of the parts by weight A, B, C, D, E and F is 100 parts by weight.
14 more elements
Dependencies are inferred from the claim text.