Filled polyphthalamide blends having improved processability and composite and filled articles therefrom
AssigneeAmoco Corporation
InventorsEdward E. Paschke, Charles L. Myers, Glenn P. Desio
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Abstract
Neat and filled polyphthalamide resins are improved in processability when blended with polypropylene and a carboxylated polyolefin resin. Filled polyphthalamides, particularly glass-filled polyphthalamide formulations, are significantly benefited, and glass fiber-filled molding resin formulations of this invention comprising high levels of fiber are more readily moldable than polyphthalamide formulations without the polyolefin components comprising the same and even lower levels of glass-fiber.
Claims9
A filled polyphthalamide comprising at least one filler selected from structural fiber and particulate fillers, and a blend of (a) 100 pbw of a copolyphthalamide comprising from about 50 to about 90 mole % hexamethylene terephthalamide units;
- (b) from about 5 to about 40 pbw crystalline polypropylene;
- and (c) from 2 to about 20 pbw, per 100 parts combined weight of polypropylene and polyphthalamide, of carboxyl-modified polypropylene.
A method for improving the processability of polyphthalamide resin comprising the step of compounding said resin with from about 5 to about 25 wt % polypropylene and from about 2 to about 10 wt % carboxylated polypropylene, based on total resinous components.
Dependencies are inferred from the claim text.