Method of producing heat-resistant and shape memory formed products
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United States of America Patent
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Oct 15, 1991
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N/A
app pub date -
Jul 2, 1990
filing date -
Dec 28, 1987
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Abstract
A method of forming a heat-resistant product, produced from a polymer composition comprising 40-70 weight % of a thermoplastic elastomer containing a repeating unit derived from ethylene and a repeating unit derived from propylene and 60-30 weight % of an ethylene-vinyl acetate copolymer containing 7.5 weight % or more of a vinyl acetate repeating unit, which comprises blending the polymer composition at a temperature of 160.degree. C. or less, molding it at a temperature of 180.degree. C. or less, and then cross-linking the resulting molded product by irradiating it with an electron beam or by heating to produce a foamed product which has good shape memory characteristics.
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