Coolant compositions with p-tert-butylbenzoic acid or salt
US5489391A · kind A · utility
8Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1992 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Oct 16, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K5/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A heat exchange inhibitor composition, characterized in that phosphates, amine salts, silicates, borates or nitrites are not necessary, and further characterized in that p-tert butyl benzoic acid and/or an alkali salt or salts thereof and a triazole are contained therein, which provides improved inhibitive abilities against metal corrosion, glycol oxidation and plugging of the circulation passages of a heat exchange system and further provides improved stability in hard water without forming chemical depositions and does not produce nitrosamines or form gel with other salts in the heat exchange fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.