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US 4,904,729 AGranted
Impact resistant polycarbonate blend
AssigneeThe Dow Chemical Company
InventorMichael K. Laughner
Life of this patent
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Abstract
Impact resistant polycarbonate blends, which may be extruded without pre-drying, are prepared from an aromatic polycarbonate, an aromatic polyester, and a polyalkyleneoxide rubber, and optionally, a grafted copolymer or mixture of grafted copolymers.
Claims6
A process for preparing a thermoplastic molding composition, comprising:
- A. blending, without pre-drying, a mixture comprising:
- (i) about 5% to about 95%, based upon total weight, of an aromatic polycarbonate;
- (ii) about 5% to about 90%, based upon total weight, of an aromatic polyester;
- and
- (iii) about 0.1% to about 20%, based upon total weight, of a polyalkyleneoxide rubber;
- and
- B. extruding, without pre-drying, the blend obtained in Step A.
4 more elements
A process for preparing a thermoplastic molding composition, comprising:
- A. blending, without pre-drying, a mixture comprising:
- (i) about 40% to about 85%, based upon total weight, of an aromatic polycarbonate characterized at least in part by repeated units corresponding to the general formula:
- ##STR5## wherein X is a divalent C.sub.1 -C.sub.15 hydrocarbon radical, a single bond, --O--, --S--, --S.sub.2 --, --SO--, --SO.sub.2 -- or --CO--, and further wherein each aromatic ring may optionally contain 1 or 2 C.sub.1 -C.sub.4 hydrocarbon radical or halo radical constituents;
- (ii) about 15% to about 60%, based upon total weight, of an aromatic polyester characterized at least in part by repeated units corresponding to the general formula:
- ##STR6## wherein n is selected from the numbers 2 through 6;
- and (iii) about 1% to about 10%, based upon total weight, of a polyalkyleneoxide rubber prepared by polymerizing:
- (a) one or more alkylene oxides of the general formula:
- ##STR7## wherein each R.sub.1 is independently a C.sub.1 -C.sub.10 alkyl or alkylene, or halo substituted alkyl or alkylene hydrocarbon radical, or a hydrogen atom;
- and optionally
- (b) epoxide-containing monomers of the general formula:
- ##STR8## wherein each R.sub.2 is independently hydrogen, or a C.sub.1 -C.sub.10 alkyl, alkenyl, alkoxy alkyl or alkoxy carbonyl radical, or halo substituted alkyl, alkenyl, alkoxy alkyl or alkoxy carbonyl radical;
- and
- B. extruding, without pre-drying, the blend obtained in Step A.
10 more elements
Dependencies are inferred from the claim text.