One-part moisture-curable polyurethane adhesive, coating, and sealant compositions
AssigneeMinnesota Mining and Manufacturing Company
InventorGerald F. Schumacher
Life of this patent
Estimating the term…
Abstract
Adhesive, coating, or sealant compositions containing prepolymer(s) derived from MDI (or derivative(s) thereof) and polyol(s) containing primary hydroxyl groups, together with bis[2-N,N-dialkylamino)alkyl]ether(s).
Claims20
Compositions, comprising:
- (a) isocyanate-functional prepolymer(s) derived from 4,4'-diphenylmethane diisocyanate (or isocyanate functional derivatives of 4,4'-diphenylmethane diisocyanate) and polyol(s) containing hydroxyl groups about 25 to 100 weight percent of which are primary hydroxyl groups, and
- (b) bis[2-(N,N-dialkylamino)alkyl]ether(s), in an amount effective to provide moisture curability of said prepolymer(s).
Compositions, comprising
- (a) isocyanate-functional prepolymer(s) derived from 4,4'-diphenylmethane diisocyanate and two or more polyols, wherein about 40 to 80 weight percent of said polyols comprise polytetramethylene oxide glycols having a molecular weight of about 650 to about 2000, and about 60 to about 20 weight percent of said polyols comprise propylene oxide-terminated ethylene oxide glycols or polypropylene glycols, and
- (b) about 0.05 to about 0.5 weight percent, based upon the weight of said prepolymer, of bis[2-(N,N-dimethylamino)ethyl]ether.
Compositions, comprising compounds of the formula ##STR4## where m is 2 or more, n is greater than or equal to zero, and B is a radical of a polyvalent polyol containing hydroxyl groups about 25 to 100 weight percent of which are primary hydroxyl groups and having a backbone selected from divalent aliphatic, olefinic, ether, ester, thioether, urethane, or urea radicals, together with bis[2-(N,N-dialkylamino)alkyl]ether(s) in an amount effective to provide moisture curability of said compounds.
Dependencies are inferred from the claim text.