Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1991-03-20
1991-12-31
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
525452, 525418, 5253305, 528 61, C08F 200, C08F22010, C08G 1800, C08G 6391
Patent
active
050773607
ABSTRACT:
The present invention is directed to a one part, sealant composition preferably comprising a free isocyanate functionalized polyacrylate. The unblocked isocyanate is surprisingly stable even in the presence of a blocked amine curing agent. Upon exposure to ambient conditions, the blocked amine will react with ambient humidity to provide an amine which in turn will react with the polyacrylate isocyanate, thereby curing the sealant and providing exceptional sealant properties. The most preferred blocked amine curative is a ketimine.
REFERENCES:
patent: 4507443 (1985-03-01), Barron et al.
DePompei Michael F.
Hernandez Pamela K.
Cheng Wu C.
Kaeding Konrad H.
Schofer Joseph L.
Tremco Inc.
Tucker Mary Ann
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