Molding compositions comprising reinforced filled wholly aromatic polyesters
AssigneeAmoco Corporation
InventorPaul D. Frayer
Life of this patent
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Abstract
This invention provides molding compositions which comprise reinforced filled wholly aromatic polyesters and which can be molded into useful articles having low warpage values and good tensile strengths.
Claims18
A molding composition having a tensile strength of at least 10,000 pounds per square inch, an as molded warpage value of less than about 5 mils, and a warpage value, after thermal treatment at 500.degree. F. for 10 minutes, of less than about 15 mils, said molding composition comprising;
- (a) from about 60 to about 80 percent, by volume, of a wholly aromatic oxybenzoyl polyester component;
- (b) from about 10 to about 20 percent, by volume, of a glass fiber component;
- and
- (c) from about 10 to about 30 percent, by volume, of a filler component,
- wherein an article molded from the composition exhibits a tensile strength of at least 10,000 pounds per square inch and wherein the sum of components (b) and (c) is from about 20 to about 40 percent, by volume.
A molded electrical connector having a tensile strength of at least 10,000 pounds per square inch, an as molded warpage value of less than about 5 mils, and a warpage value, after thermal treatment at 500.degree. F. for 10 minutes, of less than about 15 mils;
- said connector being obtained from a molding composition comprising;
- (a) from about 60 to about 80 percent, by volume, of a wholly aromatic oxybenzoyl polyester component;
- (b) from about 10 to about 20 percent, by volume, of a glass fiber component;
- and
- (c) from about 10 to about 30 percent, by volume, of a filler component,
- wherein the sum of components (b) and (c) is from about 20 to about 40 percent, by volume.
Dependencies are inferred from the claim text.