Solid sheared polymer blends and process for their preparation

Details Solid sheared polymer blends and process for their preparation Solid sheared polymer blends and process for their preparation

1993-08-02

1995-02-21

Seccuro, Jr., Carman J.

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

053916174

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.

REFERENCES:
patent: 3468979 (1969-09-01), Hamed et al.
patent: 3697429 (1972-10-01), Engel et al.
patent: 3862265 (1975-01-01), Steinkamp et al.
patent: 4088713 (1978-05-01), Herman et al.
patent: 4507515 (1985-03-01), Johnston et al.
patent: 4786697 (1988-11-01), Cozewith et al.

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