Low P type coolant composition
US6508951B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 1, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Apr 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K5/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A glycol-based coolant composition which provides an excellent metal corrosion inhibition despite its low phosphorus content is disclosed. The glycol-based coolant composition contains: (A) 0.1-5.0% by weight of at least one ingredient selected from group A′ consisting of C6-C12 aliphatic dibasic acids and their alkali metal salts; (B) 0.1-10% by weight of at least one ingredient selected from group B′ consisting of alkyl benzoic acids and their alkali metal salts; (C) 0.001-0.1% by weight of at least one ingredient selected from group C′ consisting of strontium compounds and their alkali metal salts; and (D) 0.1-0.3% by weight of at least one ingredient selected from group D′ consisting of phosphoric acids and their alkali metal salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.