Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1983-01-05
1984-06-26
Lieberman, Paul
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528 45, 525456, 525528, C08L 7604, C08G 1880
Patent
active
044567383
ABSTRACT:
Resin composition suitable for high-solids solvent-based coating composition comprises chain-extendable, crosslinkable polyol of molecular weight from about 200 to 1000, having at least three hydroxyl groups, chain-extendable diblocked diisocyanate diurethane oligomer of molecular weight between about 300 to 1500, crosslinking agent reactive with the hydroxy functionality of the polyol and substantially unreactive with de-blocked isocyanate functionality of the biblocked diisocyanate diurethane 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 diblocked diisocyanate diurethane oligomer is preferably the reaction product of a diol with a half-blocked diisocyanate, wherein the half-blocked diisocyanate is preferably the reaction product of an organic diisocyanate 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.
REFERENCES:
patent: 3321548 (1967-05-01), Sattler
patent: 3933759 (1976-01-01), Hoeschele
patent: 4089844 (1978-05-01), Tsou
patent: 4134865 (1979-01-01), Tominaga
patent: 4284572 (1981-08-01), Stanley
patent: 4294940 (1981-10-01), Hino
patent: 4315840 (1982-02-01), Kempter
patent: 4355058 (1982-10-01), Gras
Dickie Ray A.
Holubka Joseph W.
Ford Motor Company
Lieberman Paul
May Roger L.
McDermott Peter D.
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