Process for the production of rigid foams from alkaline polyether polyols
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United States of America Patent
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Jul 13, 2004
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app pub date -
Mar 18, 2003
filing date -
Mar 18, 2003
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Abstract
The present invention relates to a process for the preparation of rigid foams comprising reacting a polyisocyanate component with an isocyanate-reactive component in the present of a blowing agent. Suitable isocyanate-reactive components for the presently claimed invention comprises polyether polyols having an OH number of from 200 to 800 and containing from 3 to 8 hydroxyl groups wherein the level of alkalinity present in the polyether polyol is equivalent to a hydroxide ion level of from about 0.006% to about 0.21% by weight.
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