Diphosphonates as corrosion inhibitors for antifreeze coolants and other functional fluids
US5230819A · kind A · utility
2Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1991 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Oct 30, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F11/1676
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.