C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/140, 117/195
C08G 59/40 (2006.01) C08G 18/00 (2006.01) C08G 18/32 (2006.01) C08G 18/80 (2006.01)
Patent
CA 1193276
ABSTRACT This invention provides polymer forming resin systems and high solids solvent based chain-extendable, crosslinkable coating compositions comprising same. The invention comprises a polyepoxide, preferably a diepoxide, of molecular weight between about 100 and about 1000 used generally in amounts from about 10% to about 50% by weight of total resin, and novel diblocked dilsocyanate urea urethane oligomers of molecular weight between about 300 and about 5000. The resin components provide chain-extension polymerization during cure at elevated temperature, in situ, on the surface of a substrate. The resin system is self-crosslinking. That is, no additional crosslinking component is required. The cured coatings of the invention provide greatly improved physical properties, in particular greatly improved corrosion resistance.
413124
Ford Motor Company Of Canada Limited
Sim & Mcburney
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