Coating preparation for pretreating metal surfaces, and method e

Details Coating preparation for pretreating metal surfaces, and method e Coating preparation for pretreating metal surfaces, and method e

1996-01-18

1997-05-27

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

C23C 2230

Patent

active

056328281

ABSTRACT:
A coating preparation for pretreating metals comprises an acrylic acid or a derivative thereof and barium hydroxide in a proportion by weight of 1:0.08-0.30, as well as chromium compounds, the remainder being conventional additives and water. The amount of acrylic acid or derivative thereof is preferably 2-6% by weight. The amount of chromic acid in the chromium compounds in the coating preparation depends on the type of the metal substrate to be treated. Such a preparation combines, in a single preparation, the desired properties for conversion of the metal and adhesion, which means that instead of 2 separate layers, 1 layer is sufficient.

REFERENCES:
patent: 3350285 (1967-10-01), Nishigaki et al.
patent: 3403088 (1968-09-01), Hart
Abstract of Japanese Patent No. JP60029473 A, Forming Electrically Insulating Film On Steel Sheet--Using LIQ, Medium Contg. Chromic Anhydride, Metal Oxide, Hydroxide, or Carbonate, Resin Emulsion and Poly:Hydric Alcohol.
Abstract of Japanese Patent No. JP52103428 A, Nontacky Waterproof Acrylic Paint Compsn.--Contg. Oxides and/or Hydroxides of Alkaline Earth Metals.
PCT Report Concerning Novelty Search of International Type, Netherlands Application No. 9500250, Application Date: Feb. 10, 1995, including English translation.

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