Stable biodegradable lubricant compositions
US5681797A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 29, 1996 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Feb 29, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oxidatively stable, biodegradable lubricant composition is disclosed which comprises PA1 (A) a hydrogenated polyisoprene prepared by polymerizing isoprene such that polyisoprene is obtained wherein there are from 4 to 1000 isoprene units and hydrogenating the polyisoprene to obtain a hydrogenated polysoprene containing a residual olefinic unsaturation of not more than 10 percent based upon the unsaturation content prior to hydrogenation; and PA1 (B) at least one performance additive selected from the group consisting of PA2 (1) an alkyl phenol; PA2 (2) an ether; PA2 (3) a mono- or di-substituted glyceride; PA2 (4) a phosphorus derivative; PA2 (5) a benzotriazole; PA2 (6) a phosphorus amine salt; PA2 (7) a trihydrocarbyl phosphorothionate; PA2 (8) an aromatic amine; PA2 (9) a zinc salt; PA2 (10) a pour point depressant ester; PA2 (11) a hydrogenated block copolymer; and PA2 (12) an acrylate polymer. In addition to components (A) and (B), the composition may also contain (C) at least one oil selected from the group consisting of PA1 (1) a triglyceride oil; PA1 (2) a synthetic ester base oil; PA1 (3) a polyalphaolefin; and (4) a mineral oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.