Catalyzed fast cure polyurethane sealant composition

Details Catalyzed fast cure polyurethane sealant composition Catalyzed fast cure polyurethane sealant composition

C - Chemistry, Metallurgy

08

G

400/3012

C08G 18/18 (2006.01) C08G 18/10 (2006.01) C08G 18/20 (2006.01) C08G 18/48 (2006.01) C08G 18/80 (2006.01) C09K 3/10 (2006.01)

Patent

CA 1315441

ABSTRACT A polyurethane sealant composition is made from a polyurethane prepolymer having blocked isocyanate groups. A 1,8-diaza bicyclo(5:4:0)undecene-7 (DBU) catalyst or a derivative thereof is utilized in association with an amine curing agent having at least two primary amine groups to achieve a relatively fast cure time. The catalyst is a true catalyst in that it merely aids in unblocking the isocyanate groups whereby the curing agent can react therewith.

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