Process for rigid polyurethane foams
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United States of America Patent
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Aug 13, 2002
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app pub date -
Mar 30, 1999
filing date -
Apr 2, 1998
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Abstract
Process for the preparation of open celled rigid polyurethane or urethane-modified polyisocyanurate foams by reaction of a polyfunctional isocyanate-reactive composition with a polyisocyanate composition comprising a prepolymer of NCO-value 21-30% based on a high molecular weight oxyethylene-containing polyol.
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