Sheared polymer blends and process for their preparation

Details Sheared polymer blends and process for their preparation Sheared polymer blends and process for their preparation

1997-03-12

1998-11-17

Mullis, Jeffrey C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 73, 525 74, 525 75, 525 80, 525 84, 525197, 525211, 525240, C08L 2316, C08L 5104, C08L 5106

Patent

active

058377735

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.

REFERENCES:
patent: 3697429 (1972-10-01), Engel et al.

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