Non-borate, non-phosphate antifreeze formulations containing dib

Details Non-borate, non-phosphate antifreeze formulations containing dib Non-borate, non-phosphate antifreeze formulations containing dib

1984-11-19

1986-05-13

Lieberman, Paul

Compositions

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

Organic components

252 74, 252 76, 252 77, 252 79, C09K 500

Patent

active

045885133

ABSTRACT:
A corrosion inhibited antifreeze composition using a three-part corrosion inhibitor mixture is described. A dicarboxylic acid component, an alkali metal silicate and a triazole comprise the three corrosion inhibitors. Use of this type of mixture permits the express exclusion of amines, nitrites, nitrates, chromates, borates and phosphates and their attendant disadvantages. Nevertheless, the inventive system provides excellent corrosion resistance in alcohol-based antifreeze, particularly with respect to aluminum.

REFERENCES:
patent: 2726215 (1955-12-01), Jones
patent: 3228884 (1966-01-01), Daignault et al.
patent: 4324675 (1982-04-01), Barthold et al.
patent: 4382008 (1983-05-01), Boreland et al.
patent: 4402847 (1983-09-01), Wilson et al.
patent: 4452715 (1984-06-01), Hirozawa

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