Phillips Petroleum Company

International Flavors & Fragrances Inc.

Nathaniel Harry, Sr

Mark W Woods

Tomoe Wakida

Majid H Hindi

A composition is provided which comprises a poly(arylene sulfide) polymer, fibrous reinforcement, a polyolefin polymer, and optionally at least one other component selected from hydrotalcites, nucleating agents, organosilanes, pigments, plasticizers and fillers. The invention provides a poly(arylene sulfide) composition which exhibits improved mold release characteristics and/or a reduced tendency to flash during injection molding applications.

Poly(arylene sulfide) composition

A composition suitable for encapsulating articles such as small electronic devices and having improved tensile strength and other mechanical properties. The composition comprises a poly(phenylene sulfide) base resin, a non-reinforcing mineral filler and an ethylene/methacrylic acid copolymer. Also provided are a method of forming the composition and articles such as electronic components encapsulated with the composition.

Ethylene/methacrylic acid copolymers in poly(phenylene sulfide)

The present invention provides: a novel poly(arylene sulfide) (PAS) composition having an increased comparative tracking index (CTI) rating; a novel method wherein the inventive composition is formed and molded to produce a useful article; a novel article produced by the inventive molding method; a novel method wherein the inventive composition is formed and used to encapsulate an article; and a novel encapsulated article produced by the inventive encapsulation method. The inventive PAS composition comprises: poly(arylene sulfide) resin; talc; and an amount of hindered phenol sufficient to increase the composition's CTI rating.

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Southfield, MI, United States of America

Nathaniel Harry, Sr