Aqueous coating composition having improved acid etch and...

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...

Reexamination Certificate

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C428S423100, C524S839000, C524S840000, C525S453000, C525S456000, C528S049000, C528S071000

Reexamination Certificate

active

07019070

ABSTRACT:
An aqueous coating composition having a pH of 6.0–10.0 comprises 30% to 70% by weight of film-forming binder and correspondingly 70% to 30% by weight of an aqueous liquid carrier for the binder; wherein the binder comprisesa. 20% to 95% by weight, based on the weight of the binder, of a urethane oligomer having a weight average molecular weight of 300 to 2500 and having acid functionality and neutralized with an amine and to form a water-dispersible product; andb. 5% to 80% by weight, based on the weight of the binder, of a water-compatible alkylated melamine formaldehyde crosslinking agent;finishes formed from the composition have good gloss and distinctness of image and excellent acid etch and mar resistance.

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patent: WO 00/55269 (2000-09-01), None
patent: WO 03/022947 (2003-03-01), None
Patent Abstracts of Japan—JP 01 193367 A.

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