Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1981-12-28
1983-12-27
Griffin, Ronald W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523400, 523456, 524361, 524379, 524589, 525528, 528 45, C08G 1828, C08K 505, C08K 507, C08L 6300
Patent
active
044231717
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 diisocyanate diurea 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.
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Ford Motor Company
Griffin Ronald W.
May Roger L.
McDermott Peter D.
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