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US 4,788,251 AGranted
Polyester-polycarbonate compositions with favorable melt viscosity properties
AssigneeGeneral Electric Company
InventorsSterling B. Brown, James L. DeRudder
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Abstract
Polyester-polycarbonate blends having increased melt viscosity, and useful in such applications as blow molding, profile extrusion and thermoforming, are prepared by incorporating at least one poly(O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate, preferably triglycidyl isocyanurate. They may also contain impact modifying polymers.
Claims20
A composition comprising the following and any reaction products thereof:
- (A) at least one linear polyester or copolyestercarbonate containing a measurable proportion of epoxide-reactive functional groups;
- (B) at least one polycarbonate or copolyestercarbonate which is substantially inert to epoxy groups;
- and
- (C) at least one poly(O- or N-epoxyalkyl-substituted) cyclic amide, imide or imidate;
- the proportion of component B being at least about 35% by weight of components A and B, and the proportion of component C employed being about 0.05-3.0 parts by weight per 100 parts of component A.
2 more elements
Dependencies are inferred from the claim text.