Jerome A Darden

US Patent:

47598646, Jul 26, 1988

Filed:

Sep 4, 1987

Appl. No.:

7/093419

Inventors:

Walter A. Van Neste - Amandsberg, BE
Jean P. Maes - Merelbeke, BE
Jerome W. Darden - Irvine CA
Carol A. Triebel - Austin TX

Assignee:

Texaco Inc. & S.A. Texaco Petro, N.V. - White Plains NY

International Classification:

C09K 500

US Classification:

252 75

Abstract:

A corrosion-inhibited antifreeze concentrate formulation containing no phosphate, amine, or nitrite compounds consists essentially of: (a) a major amount of a water soluble liquid alcohol freezing point depressant; (b) from 0. 1-5. 0 weight percent of a C. sub. 6 -C. sub. 12 aliphatic monobasic acid or the alkali metal salt thereof; (c) from 0. 1-5. 0 weight percent of an alkali metal borate compound; and (d) from 0. 1-5. 0 weight percent of a hydrocarbyl triazole. The concentrate formulation and aqueous antifreeze formulations of the instant invention give synergistic corrosion protection for a variety of metal surfaces as compared with compositions containing only the aliphatic monobasic acid/salt or alkali metal borate component alone.