Grafted and cross-linked epm

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525301, C08F26704

Patent

active

046705155

ABSTRACT:
The peroxide catalyzed reaction of maleic anhydride and a saturated ethylene-propylene rubber of low molecular weight and the hydrolysis thereof produces a reversibly crosslinked product of apparent higher molecular weight by measure of Mooney viscosity but apparent unchanged molecular weight by reduced solution viscosity (RSV). The graft product of a low molecular weight semi-solid substrate can be recovered conveniently as a non-cold flowing solid which has utility as a low molecular weight oil VI improver and as an impact modifier for polar thermoplastic resins.

REFERENCES:
patent: 3884882 (1975-05-01), Caywood
patent: 4026967 (1977-05-01), Flexman et al.
patent: 4031062 (1977-06-01), Shirayama et al.
patent: 4161452 (1979-07-01), Stambaugh et al.

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