Amine catalysts for polyurethane foams
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United States of America Patent
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Oct 19, 2021
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Oct 17, 2019
app pub date -
Oct 15, 2018
filing date -
Oct 12, 2007
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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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