AMINE CATALYSTS FOR POLYURETHANE FOAMS
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United States of America
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Apr 7, 2022
app pub date -
Oct 14, 2021
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Oct 14, 2021
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Abstract
The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to open-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a sterically hindered amine catalyst.
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