Mixtures of olefin-ester copolymer with polyolefin as viscosity modifier
US9758743B2 · kind B2 · utility
3Cited by
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Key dates
| Filing date | Feb 14, 2013 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Aug 4, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/09
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition of an oil of lubricating viscosity; an esterified copolymer with a backbone comprising units derived from (i) an α-olefin monomer of at least about 6 carbon atoms and (ii) an ethylenically unsaturated carboxylic acid in a mole ratio of 1:3 to 3:1; and a polymer comprising olefin monomer units of 3 to 5 carbon atoms, wherein at least 50 percent by weight of such units contain fewer than 6 carbon atoms and wherein less than 5 percent by weight of such units are ethylene monomer units; exhibits good power transfer efficiency and elastohydrodynamic film thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.