Non-yellowing clear coatings

Details Non-yellowing clear coatings Non-yellowing clear coatings

1989-05-16

1990-01-23

Schofer, Joseph L.

Stock material or miscellaneous articles

Composite

Of metal

524517, 526212, 525194, 525384, C08L 3700

Patent

active

048957682

ABSTRACT:
An automotive and refinish coating containing a curing catalyst which minimizes yellowing of a finish after exposure to weathering wherein the composition has a binder of an acrylic polymer of polymerized monomers of alkyl methacrylate, alkyl acrylate or mixtures thereof and the polymer has pendent aminoester or hydroxy aminoester groups and a glycidyl acrylic crosslinking polymer of polymerized monomers of glycidyl methacrylate or glycidyl acrylate and an alkyl methacrylate or acrylate or mixtures thereof; wherein the catalyst is the alkyl ester of para hydroxy benzoic acid having 1-4 carbon atoms in the alkyl group.

REFERENCES:
patent: 3029276 (1962-04-01), Hausweiler et al.
patent: 3206431 (1965-09-01), Doyle et al.
patent: 3321509 (1967-05-01), Burris et al.
patent: 3714227 (1973-01-01), Ueno et al.
patent: 3809678 (1974-05-01), Kriesten et al.
patent: 4101459 (1978-07-01), Andrews
patent: 4525521 (1985-06-01), Den Hartog et al.
Neidig et al., "The Esters of Para-Hydroxybenzoic Acid as Preservatives," Reprint from the Drug and Cosmetic Industry--Apr. 1944, pp. 1-8.

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