Foamed cellular polyester resins and process for their preparation
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United States of America Patent
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Jun 6, 1995
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N/A
app pub date -
Jul 14, 1994
filing date -
Dec 16, 1991
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Abstract
A foamed cellular material from polyester resins is obtained by extrusion foaming of polyester resins having melt strength higher than 8 centinewton, intrinsic viscosity greater than 0.8 dl/g and complex melt viscosity higher than 25,000 poises.
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