Synthetic polyolefin lubricant blends having high viscosity indices
US4990711A · kind A · utility
42Cited by
15References
27Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 23, 1988 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Jun 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2020/01
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compositions and methods of preparation for a lubricant mixture having enhanced viscosity index comprising: PA1 (a) a low viscosity C.sub.20 -C.sub.60 lubricant range liquid comprising substantially linear hydrocarbons prepared by shape selective catalysis of lower olefin with medium pore acid zeolite catalyst to provide substantially linear liquid olefinic intermediates or C.sub.20.sup.+ hydrogenated lubricants, said lubricant range liquid having a kinematic viscosity of about 2-10 cS at 100.degree. C.; and PA1 (b) at least one poly(alpha-olefin) having viscosity greater than 20 cS and viscosity index improvement properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.