Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1987-03-25
1989-01-17
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 54, 528 61, C08G 1881, C08G 1808, C08G 1810
Patent
active
047988797
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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Greenlee Thomas W.
Hannah Steven L.
Williams Maureen R.
Anderson Harold D.
Daley Dennis R.
Hudak Daniel J.
Lindsay James R.
The B.F. Goodrich Company
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