Sheared polymer blends and process for their preparation
US5837773A · kind A · utility
21Cited by
1References
53Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 12, 1997 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Mar 12, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2227/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution. The sheared blend of polymers can function as a shear stable dispersant viscosity index improver with improved lower temperature properties or the hydrocarbon base for multifunctional for viscosity index improvers, motor fuel additives or polymeric dispersants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.