Chain-extendable crosslinkable urethane modified polyhydroxy oli

Details Chain-extendable crosslinkable urethane modified polyhydroxy oli Chain-extendable crosslinkable urethane modified polyhydroxy oli

1983-01-05

1985-11-19

Briggs, Sr., Wilbert J.

Coating processes

With post-treatment of coating or coating material

Heating or drying

524700, 524765, 525509, 525528, 528 45, 560 24, 560 25, 560157, 560158, B05D 302, C08L 7508

Patent

active

045541884

ABSTRACT:
High solids, solvent-based resin composition comprises novel chain-extendable, crosslinkable urethane modified polyhydroxy oligomers, crosslinking agent and, preferably, catalyst(s). The composition cures at elevated temperature to provide a coating on a substrate, such as steel, which is highly resistant to corrosion, humidity and solvents and provides corrosion protection for the substrate. The novel oligomers can be the reaction product of a polyol with a half-blocked diisocyanate, wherein said polyol comprises three or more hydroxy, and the half-blocked diisocyanate comprises the reaction product of an organic diisocyanate with approximately one molar equivalent of a monofunctional blocking agent.

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