Phillips Petroleum Company

Robert J Martinovich

Rodrigo A Garcia

John E Leland

Ronald D Mathis

Roger T Shiflet

Roel Moreno

Zinc titanate is used in poly(arylene sulfide) compositions to improve encapsulation properties. Electronic components are encapsulated with poly(arylene sulfide) compositions containing zinc titanate.

Zinc titanate in poly(arylene sulfide) compositions

Zinc titanate in poly (arylene sulfide) compositions

Polymer compositions and method for improving processability of compositions of normally solid polymers of arylene sulfides by the addition of at least one of cyanurate and isocyanurate compounds in an amount effective to improve the processability of the composition. In a preferred embodiment the amount of cyanurate and isocyanurate in the total composition is in the range of about 0.1 to about 10 weight percent. The invention is applicable to improving the processing characteristics and other properties of arylene sulfide polymers and filled arylene sulfide polymers.

Polymer compositions

In accordance with this invention, the formation of bubbles in a composition of (a) ethylene polymer, (b) flame retardant system, and (c) peroxide is inhibited or eliminated by employing as the peroxide a halogenated organic peroxide.

Halogenated organic peroxides in flame retardant ethylene polymer

A melt-blended composition comprising poly(arylene sulfide) and hydrogenated conjugated diene/monovinyl aromatic block copolymer with the hydrogenated conjugated diene/monovinyl aromatic block copolymer present in an amount of up to about 5 weight percent of the total composition. A method for increasing the crystallinity of poly(arylene sulfide) by melt-blending therewith hydrogenated conjugated diene/monovinyl aromatic block copolymer in an amount up to about 5 weight percent of the total composition.

Poly(arylene sulfide) compositions

Compositions comprising propylene polymer, e.g., polypropylene, and hydrated alumina as filler precursor and sole blowing agent, wherein the alumina can be 30 to 60 weight percent of the total composition, are converted into foam having a fine and uniform cellular structure by passage through an unvented extruder at specified temperature profiles and pressures.

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Bartlesville, OK, United States of America

Robert J Martinovich