摘要 |
The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-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 an-amine catalyst that preferably has a Fluoride Generation Value of not greater than about 1000 ppm. |
申请人 |
HONEYWELL INTERNATIONAL INC.;WILLIAMS, DAVID, J.;BOGDAN, MARY, C.;GITTERE, CLIFFORD, P.;POSS, ANDREW, J. |
发明人 |
WILLIAMS, DAVID, J.;BOGDAN, MARY, C.;GITTERE, CLIFFORD, P.;POSS, ANDREW, J. |