Phillips Petroleum Company

Rodrigo A Garcia

Robert J Martinovich

Roel Moreno

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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Pasadena, TX, United States of America

Rodrigo A Garcia