Acidic hydrosols and process for coating therewith

Details Acidic hydrosols and process for coating therewith Acidic hydrosols and process for coating therewith

1975-10-24

1977-07-19

Smith, Ronald H.

Stock material or miscellaneous articles

Composite

Of metal

106 74, 148113, 252 635, 427121, 427126, 427372A, 427379, 427380, 428471, 428472, D02G 1500

Patent

active

040370194

ABSTRACT:
Acidic hydrosols are provided for forming an electrically insulating and corrosion resistant coating on a substrate which consumes a minor quantity of acid from said hydrosol, said substrate being selected from the group consisting of metals higher than hydrogen in the electromotive series, porcelain, glass, wood, paper, cotton, plastics and hydrateable oxides.
The hydrosols of this invention are formed by admixing water, an acid such as phosphoric acid, or nitric acid, or hydrochloric acid or acetic acid or mixtures thereof, a metal silicate or hydrous magnesium silicate, and optionally, a magnesium compound and a boron compound. A significant feature of the present hydrosols is their water-white clarity and resistance to deterioration or decompositin for at least 15-20 minutes, and their ability to deposit a substantially uniform coating virtually instantaneously upon said substrates when placed in contact therewith.

REFERENCES:
patent: 2807552 (1957-09-01), Robinson
patent: 3002857 (1961-10-01), Stalego
patent: 3041205 (1962-06-01), Iler
patent: 3078186 (1963-02-01), Tierney
patent: 3151997 (1964-10-01), Harvey
patent: 3399078 (1968-08-01), Bang
patent: 3479201 (1969-11-01), Stoane
patent: 3706596 (1972-12-01), Walloch
patent: 3847583 (1974-11-01), Dislich et al.

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