Diphosphonates as corrosion inhibitors for antifreeze coolants a

Details Diphosphonates as corrosion inhibitors for antifreeze coolants a Diphosphonates as corrosion inhibitors for antifreeze coolants a

1991-10-30

1993-07-27

Skane, Christine

Compositions

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

Organic components

252 75, 25238923, 422 7, 422 15, C09K 500, C23F 11167

Patent

active

052308197

ABSTRACT:
A coolant or antifreeze composition has one or more glycols or glycol ethers in combination with water, one or more additives, and an effective amount of 1-hydroxyoctylidene-1,1-diphosphonic acid or 1-hydroxydodecylidene-1,1-diphosphonic acid as a corrosion inhibitor.

REFERENCES:
patent: 3855284 (1974-12-01), Germscheid
patent: 3935125 (1976-01-01), Jacob
patent: 4101441 (1978-07-01), Hwa et al.
patent: 4329243 (1982-05-01), Diebel
patent: 4613450 (1986-09-01), Moran et al.
patent: 4707286 (1987-11-01), Carr
patent: 4904413 (1990-02-01), Hoots et al.
patent: 5000916 (1991-03-01), Vukasovich et al.
patent: 5118434 (1992-06-01), Meyer et al.

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