Poly(arylene sulfide) composition and method using silica to reduce drool
AssigneePhillips Petroleum Company
InventorVan C. Vives
Life of this patent
Estimating the term…
Abstract
A composition comprises poly(arylene sulfide), fiberglass, an additive containing an element selected from among the group consisting of alkaline earth metals, magnesium and beryllium; and silica present in an amount sufficient to increase the shear sensitivity of the composition so that the composition does not drool during molding. A method for providing a composition having reduced drool during molding comprises admixing with a composition containing poly(arylene sulfide) and fiberglass an amount of silica sufficient to increase shear sensitivity of the composition so that the composition has reduced drool during molding.
Claims12
A composition having improved shear sensitivity comprising:
- poly(phenylene sulfide) in an amount in the range of from about 30% to about 65% by weight based on the total of said composition;
- fiberglass in an amount in the range of from about 5% to about 50% by weight based on the total weight of said composition;
- an additive selected from the group consisting of calcium carbonate, calcium sulfate, and talc, said additive being present in said composition in an amount in the range of from about 2% to about 58% by weight based on the total weight of said composition;
- and silica in an amount in the range of from about 4% to about 7.2% by weight based on the total weight of said composition, wherein said silica is a high surface silica having a surface area in the range of from about 50 to about 400 m.sup.2 /g.
A composition having improved shear sensitivity comprising:
- about 68 parts by weight poly(phenylene sulfide);
- about 8 parts by weight silica;
- about 70 parts by weight fiberglass;
- about 51.5 parts by weight calcium sulfate;
- about 0.5 parts by weight polyethylene;
- and about 2 parts by weight lithium carbonate, wherein said silica is a high surface silica having a surface area in the range of from about 50 to about 400 m.sup.2 /g.
A method of increasing the shear sensitivity of a poly(phenylene sulfide) composition, said composition comprising from about 30 to about 65 parts by weight poly(phenylene sulfide), from about 5 to about 50 parts by weight fiberglass, and from about 2 to about 58 parts by weight of an additive selected from the group consisting of calcium carbonate, calcium sulfate, and talc, said method comprising the step of admixing with said composition an amount of silica in the range of from about 4 to about 7.2 parts by weight, said silica being a high surface silica having a surface area in the range of from about 50 to about 400 m.sup.2 /g.
A method of increasing the shear sensitivity of a poly(phenylene sulfide) composition, said composition comprising about 68 parts by weight poly(phenylene sulfide), about 70 parts by weight fiberglass, about 51.5 parts by weight calcium sulfate, about 0.5 parts by weight polyethylene, and about 2 parts by weight lithium carbonate, said method comprising the step of admixing with said composition about 4 parts by weight silica, said silica being a high surface silica having a surface area in the range of from about 50 to about 400 m.sup.2 /g.
Dependencies are inferred from the claim text.