Controlled microcellular foams of crystalline amorphous polymers
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United States of America Patent
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Nov 29, 1994
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N/A
app pub date -
May 13, 1992
filing date -
May 13, 1992
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Expired
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Abstract
Controlled foams of crystalline amorphous polymers include a second phase polymeric material having a transition temperature below that of the matrix polymeric material. The second phase material provides nucleating sites for the growth of gas formed cells which are limited in size by the particle size of the second phase polymeric material.
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