C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/131, 117/195
C08G 18/80 (2006.01) B05D 3/02 (2006.01) C08G 18/28 (2006.01) C08G 18/48 (2006.01) C08G 18/64 (2006.01) C08L 75/04 (2006.01)
Patent
CA 1207494
- 37 - ABSTRACT OF THE INVENTION Resin composition suitable for high solids, solvent based coating composition comprises chain-extendable, crosslinkable polyol of molecular weight about 100 to 1000, having at least three hydroxyl groups, chain-extendable diblocked diisocyanate diurea oligomer of molecular weight about 200 to 15001 comprising the reaction product of a half-blocked diisocyanate with diamine, crosslinking agent reactive with the hydroxy funcitonality of the polyol and substantially unreactive with the de-blocked isocyanate functionality of said diblocked diisocyanate diurea oligomer, and, preferably, catalyst(s). The composition cures at elevated temperature to provide a coating on a substrate, such as steel, which coating is highly resistant to corrosion, humidity and solvents and provides corrosion protection for the substrate. The half-blocked diisocyanate is preferably the reaction product of an organic diisocyante with monofunctional blocking agent. The polyol is preferably the reaction product of a diol of molecular weight about 60 to 500 with a diepoxide of molecular weight about 100 to 1000 such as bisphenol A epichlorohydrin epoxy resin, hydantoin epoxy resin and the like.
413149
Dickie Ray A.
Holubka Joseph W.
Ford Motor Company Of Canada Limited
Sim & Mcburney
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