Stabilized blends of polycarbonate with emulsion derived polymers
OwnerJames DeRudder, Robert Gallucciinventors
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Abstract
Blends of polycarbonate with emulsion polymerization derived polymers, such as ABS, ASA and MBS, may be stabilized against loss of properties due to the action of water, by addition of calcined alumino magnesium carbonate.
Claims42
1) A composition with improved hydrolytic stability comprising a mixture of polycarbonate, an emulsion based polymer, and calcined alumino magnesium carbonate in an amount effective to provide improved hydrolytic stability to the composition.
2) The composition of claim I wherein the calcined alumino magnesium carbonate is a calcined hydrotalcite.
18) A composition with improved hydrolytic stability comprising blends of polycarbonate with emulsion derived vinyl polymers and calcined alumino magnesium carbonate which retain at least about 50% of the initial Izod impact strength of the composition, as measured by IS0180, after exposure to about 95% relative humidity for about 500 hours at about 90° C.
20) A composition with improved hydrolytic stability comprising blends of 45-90 wt % polycarbonate with 10-45 wt % emulsion derived acrylonitrile butadiene styrene polymers and 0.001-1.0 wt % calcined alumino magnesium carbonate which retain at least about 50% of the initial tensile strength of the composition, as measured by IS0527, after exposure to about 95% relative humidity for about 500 hours at about 90° C.
21) A process to improve the stability of blends of polycarbonate with emulsion derived vinyl polymers comprising the addition of sufficient calcined alumino magnesium carbonate to retain at least about 50% of the initial tensile strength of the composition, as measured by IS0527, after exposure to about 95% relative humidity for about 500 hours at about 90° C.
39) A process to improve the stability of blends of polycarbonate with emulsion derived vinyl polymers comprising the addition of sufficient calcined alumino magnesium carbonate to retain at least about 50% of the initial Izod impact strength of the composition, as measured by IS0180, after exposure to about 95% relative humidity for about 500 hours at about 90° C.
41) A process to improve the stability of blends of 45-90 wt % polycarbonate with 10-45 wt % emulsion derived acrylonitrile butadiene styrene polymers comprising the addition of 0.001-1.0 wt % calcined alumino magnesium carbonate to retain at least about 50% of the initial tensile strength of the composition, as measured by IS0527, after exposure to about 95% relative humidity for about 500 hours at about 90° C.
Dependencies are inferred from the claim text.