Latex stability by addition of fluoride salts

Details Latex stability by addition of fluoride salts Latex stability by addition of fluoride salts

1974-03-21

1976-05-25

Briggs, Sr., Wilbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296R, 260 296PM, 260 296PT, 260 296RW, 260 297H, 260 297AT, 260 297EM, 260 297M, 423290, 423297, C08L 908

Patent

active

039592049

ABSTRACT:
Latex-based coating materials are prepared frequently by compounding the latex with large quantities of calcium carbonate fillers. Whenever these fillers contain water-soluble calcium and magnesium compounds as impurities latices prepared with anionic emulsifiers are made more unstable, apparently because of reaction between these impurities and the emulsifier. This instability can be overcome by including in the latex a water-soluble fluoride such as ammonium or potassium fluoride in an amount generally under 5 parts by weight per 100 parts dry weight of latex. The process involves adding such a fluoride in an amount sufficient to stabilize the latex, generally under 5 parts per hundred of latex, dry weight.

REFERENCES:
patent: 2914474 (1959-11-01), Hillyer et al.
patent: 3337453 (1967-08-01), DeLisle
patent: 3529929 (1970-09-01), Page et al.
Blackley, High Polymer Latices I, pp. 28-29, 91-92 (Applied Science Ltd. 1966).

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