Polyisocyanate compositions and their use in the preparation of flexible polyurethane foams
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United States of America Patent
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Feb 25, 1992
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N/A
app pub date -
May 17, 1990
filing date -
May 17, 1989
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Expired
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Abstract
Polyisocyanate compositions comprising: (a) from 90 to 50% by weight of the reaction product between an organic diisocyanate and a polyether-polyol of functionality of at least 2, and wherein said reaction product has a content of free NCO radicals within the range of from 26.5 to 33% by weight; and (b) from 10 to 50% by weight of polymethylene-polyphenyl-polyisocyanates.
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