Solid sheared polymer blends and process for their preparation
US5391617A · kind A · utility
26Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Aug 2, 2013 |
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 and to yield a product that can be recovered as a solid using conventional plastic processing equipment. The sheared blend of polymers can function as a shear stable viscosity index improver with improved lower temperature properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.