C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/100, 403/14
C08G 18/32 (2006.01) C08G 18/18 (2006.01) C08G 18/65 (2006.01)
Patent
CA 1250999
ABSTRACT This invention concerns an active hydrogen- -containing composition and a process for preparing a polyurethane foam using said composition. The active hydrogen-containing composition comprises (a) at least one polyahl having at least three active hydrogens per molecule and which is not a dialkanol tertiary amine, (b) a minor amount of water, and (c) a dialkanol tertiary amine present in an amount sufficient to improve the flowability of a foaming reaction mixture prepared from the active hydrogen-containing composi- tion and a polyisocyanate, characterized in that the isocyanate--reactive materials present in said active hydrogen-containing composition have an average func- tionality of at least 3Ø The compressive strength of rigid foams prepared by the process of this inven- tion is generally equal or superior to rigid foams prepared by previously known compositions.
489237
Smart & Biggar
The Dow Chemical Company
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