Protective coating composition and process for aluminum and alum

Details Protective coating composition and process for aluminum and alum Protective coating composition and process for aluminum and alum

1983-05-09

1985-05-07

Welsh, Maurice J.

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...

204 371, 204 387, 204 383, 4273882, 4273884, 427409, 4274195, 524840, C08L 7504

Patent

active

045159190

ABSTRACT:
A protective coating composition and process is described for simultaneously sealing and priming the anodic coating applied to aluminum and alloys thereof without the need for elevated temperatures during a subsequent curing step. The composition comprises a colloidal, water-borne polyurethane resin which is an aromatic, aliphatic or alicyclic copolymer. The composition is curable at ambient temperatures but may include a cross-linking agent as well as a thermosetting catalyst. The process comprises the steps of anodizing the component to be coated, applying the coating composition at elevated temperatures to thereby simultaneously seal and prime the component and curing the sealed and primed component at ambient temperatures. If cross-linking agents are employed then elevated cure temperatures are utilized.

REFERENCES:
patent: 4097677 (1978-06-01), Emmons et al.
patent: 4203883 (1980-05-01), Hangauer
patent: 4310390 (1982-01-01), Bradley et al.
patent: 4425468 (1984-01-01), Makhlouf et al.

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