Thermosetting coating composition comprising polymeric catalyst-

Details Thermosetting coating composition comprising polymeric catalyst- Thermosetting coating composition comprising polymeric catalyst-

1982-09-30

1984-12-04

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

525110, 525118, 525119, 525510, 525514, C08F 846, C08L 6310, C08L 3310, C08K 1100

Patent

active

044865554

ABSTRACT:
A novel organic solvent based, thermosetting coating composition comprises novel epoxy ester resin having number average molecular weight (M.sub.n) about 1000 to about 5000 and being the reaction product of diepoxide, for example bisphenol-A epichlorohydrin epoxy resin, with (i) dicarboxylic acid, for example the dimerization reaction product of C-18 fatty acid, in chain extension reaction and (ii) fatty acid, for example Soya fatty acid, in chain terminating esterification reaction, which chain extension reaction and esterification reaction occur at least in part substantially simultaneously. Preferably, catalyst is employed for said chain extension and esterification reactions. The coating composition further comprises polyfunctional aminoplast crosslinking agent, for example, hexamethoxymethylmelamine, and polycarboxy functional polymeric catalyst. Also provided is a method of making a humidity and solvent resistant coating on a substrate, adapted to provide corrosion protection to the substrate, for example, to bare sheet metal of an automotive vehicle body, which method comprises applying the novel coating composition of the invention to the substrate, for example, by spraying techniques, and subjecting the applied coating to an elevated temperature for a time sufficient to cure the coating.

REFERENCES:
patent: 3215757 (1965-11-01), Scheibli et al.
patent: 3951891 (1976-04-01), Topfl et al.
patent: 4293457 (1981-10-01), Simon
patent: 4296005 (1981-10-01), Di Benedetto
Lee & Neville, Handbook of Epoxy Resins, McGraw-Hill Book Co., New York, N.Y., 1967, pp. 11-13 to 11-15, 11-17 to 11-19 & 17-21.

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