Antifreeze composition

Details Antifreeze composition Antifreeze composition

1974-01-04

1976-06-01

Van Balen, William J.

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 77, 252408, C09K 5000, C09K 300

Patent

active

039607402

ABSTRACT:
Antifreeze compositions are provided which contain glycol-water concentration indicators. When used in motor vehicle radiators, the indicators in the compositions enable the motorist at a glance to determine when the glycol level has been reduced. The indicators are colored moieties, i.e., dyes, which have at least one substituent which will give a differential solubility at different glycol-water concentrations. Preferred substituents are hydroxy groups and amino groups and the preferred colored moiety is an anthraquinone dye.

REFERENCES:
patent: 1911195 (1933-05-01), Kepfer
patent: 2373570 (1945-04-01), Keller
patent: 2384553 (1945-09-01), Kiffer
patent: 2937145 (1960-05-01), Cutlip et al.
patent: 2937146 (1960-05-01), Cutlip et al.
Hodgman, Charles D., Handbook of Chemistry and Physics, 25th Edition, Chemical Rubber Publishing Co., Cleveland, Ohio, pp. 1320-1322.

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