Allied Corporation

Alliedsignal Inc.

Allied Chemical Corporation

Paul W Flood

Charles D Mason

Stephen R Schulze

Peter P Salatiello

Frank Petrucelli

Albert H Steinberg

The present invention is a method of rotationally molding an article having a layer made of polyamide composition. The method comprises the steps of melt blending a polyamide composition comprising the polyamide and a copolymer comprising units derived from an alpha-olefin of the formula RCH.dbd.CH.sub.2 where R is H or an alkyl having from 1 to 8 carbon atoms and from 0.2 to 25 mole percent based on the alpha-olefin-acid copolymer of an alpha, beta-ethylenically unsaturated carboxylic acid having from 3 to 8 carbon atoms. The copolymer has from 10% to 90% of the carboxylic groups neutralized by metal ions. The melt blended composition is formed into particles, including pellets and powder, suitable for rotational molding. The particles are rotationally molded to form an article.

Rotational molding of articles having impact resistance

A rotational moldable polyamide composition, a method of preparing the composition, and a method of rotational molding. The composition contains from about 0.001 percent to about 0.5 percent by weight of a copper compound, preferably cuprous iodide. Preferably, the composition contains from about 0.001 percent to about 0.3 percent by weight of potassium iodide.

Nylon composition for use in rotational molding

Certain metal compounds such as antimony oxide and magnesium oxide are used to enhance the notched Izod impact resistance of molded objects made from selected polyamide copolymer compositions comprised of polyepsiloncaprolactam (nylon-6) or polyhexamethyleneadipamide (nylon-66) and preferably ethylene/ethyl acrylate and ethylene/acrylic acid copolymers.

High impact molding compositions

Synergistic improvement of nylon-6 or nylon-66 impact resistance by blending, in the melt, with minor proportions of both an ethylene/acrylic acid copolymer and an ethylene/ethyl acrylate copolymer.

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Lake Hopatcong, NJ, United States of America

Paul W Flood