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US 8,263,691 B2Granted
Release agent for transparent polyimide blends
AssigneeSabic Innovative Plastics IP B.V.
InventorsRobert Russell Gallucci, Mark A. Sanner, Rajendra Kashinath Singh
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Abstract
Compositions made from a polyarylate or polyester carbonate containing greater than about 50 mole % resorcinol based ester linkages give miscible blends with polyimide resins, addition of alkyl amide compounds improves mold release and melt flow while maintaining transparency. The blends also have high refractive index and low haze.
Claims22
A composition comprising a miscible polymer blend of:
- a) a resin selected from the group consisting of resorcinol based polyester carbonates, resorcinol based polyarylates and mixtures thereof,
- b) at least one alkyl amide compound with a molecular weight from 250 to 1000 and
- c) one or more polyimide resins,
- wherein said polyester carbonates and polyarylates have at least 50 mole % aryl ester linkages derived from resorcinol, and wherein the miscible polymer blend has a percent transmission, as measured at 3.2 mm, using ASTM method D1003, of greater than or equal to 50%;
- wherein the alkyl amide mold release agent is selected from the structures shown below:
- wherein Ra or Ra1 are a C1 to C30 alkyl group and Rb, Rc and Rc1 are independently H or a C1 to C30 alkyl group and Rd is a C2 to C6 alkyl group, and
- wherein the refractive index, as measured by ASTM method D542, is from about 1.580 to about 1.680.
4 more elements
A composition comprising a miscible polymer blend of:
- a) 1 to 99% by weight of one or more polyetherimide resins,
- b) 99 to 1% by weight of one or more aryl polyester resin containing at least 50 mole% resorcinol linkages,
- c) 0.01 to 5% by weight of at least one alkyl amide compound,
- d) 0 to 40% by weight of one or more aryl alkyl polyesters and
- e) 0 to 2% by weight of one or more phosphorus containing stabilizers.
2 more elements
Dependencies are inferred from the claim text.