Corrosion-inhibiting compositions and functional fluids containing same
US5178786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1989 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Aug 4, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a composition comprising: PA0 (A) at least one dicarboxylic acid or anhydride or at least one ammonium or metal salt of the dicarboxylic acid or anhydride; and PA0 (B) at least one compound represented by the formula ##STR1## wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each independently hydrogen, alkyl, hydroxyalkyl, polyhydroxyalkyl, polyalkoxyalkyl or hydroxypolyalkoxyalkyl; and R.sub.1 is a hydrocarbyl group. In another embodiment, the compositions include (C) at least one acid, or ammonium or metal salt of the acid represented by the formula: ##STR2## wherein R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are each independently hydrogen or hydrocarbyl groups; and n is a number from 1 to about 10; PA0 (D) at least one ester-salt derived from at least alkyl or alkenyl succinic acid or anhydride of about 8 to about 28 carbon atoms and at least one alkanol amine; PA0 or mixtures of (C) and (D). The invention further provides for concentrates and functional fluids containing the above corrosion-inhibitors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.