Non-yellowing clear coatings

Details Non-yellowing clear coatings Non-yellowing clear coatings

1988-12-20

1990-06-26

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

526212, 525384, C08L 3700

Patent

active

049372815

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), DenHartog et al.
Neidig et al., "The Esters of Para-Hydroxy Benzoic Acid as Preservatives", Reprint from the Drug and Cosmetic Industry, Apr. 1944, pp. 1-8 (copy in 560/67).

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