Lubricant with a higher molecular weight copolymer lube oil flow improver
US5939365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1996 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Dec 20, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant which comprises: a mineral oil basestock which has been dewaxed via catalytic cracking and/or catalytic isomerization; an alkylene-alkylene copolymer; and a lubricating oil flow improver formed from the reaction product of: (a) an unsaturated carboxy ester formed via the esterification of an unsaturated carboxylic acid or its corresponding anhydride with a monohydric aliphatic alcohol having an average carbon number of between about 10 to 18, the unsaturated carboxy ester having the formula: ##STR1## wherein R' is selected from the group consisting of hydrogen and COOR and wherein R is a C.sub.6 to C.sub.22 alkyl group; and (b) a monomer selected from the group consisting of PA1 (i) a vinyl ester having the formula: ##STR2## wherein R.sub.1 comprises an alkyl group containing from 1 to 18 carbon atoms; PA1 (ii) an olefin having the formula ##STR3## wherein R.sub.1 and R.sub.2 can independently be hydrogen, an alkyl having from 1 to 28 carbon atoms, or a substituted aryl group, provided both R.sub.1 and R.sub.2 are not hydrogen, the reaction product having a specific viscosity in the range between about 0.3 to 1.5, or a weight average molecular weight of between about 50…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.