Process for preparation of diene type polymer rubber

Details Process for preparation of diene type polymer rubber Process for preparation of diene type polymer rubber

1989-03-29

1991-03-19

Lipman, Bernard

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

Synthetic resins

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

525283, 5253328, 5253329, 5253331, 5253332, 525375, C08F 830

Patent

active

050011960

ABSTRACT:
An improved diene type polymer rubber is prepared by reacting a diene type polymer rubber, to which an alkali metal and/or an alkaline earth metal has been added, with a compound represented by the formula: ##STR1## wherein M is oxygen or sulfur, R.sub.1 and R.sub.4 are a substituent having no hydrogen on the .alpha.-carbon atom, R.sub.2 and R.sub.3 are hydrogen or a hydrocarbon group, m is an integer of at least 2, and n is an integer of 2 to 4. The diene type polymer rubber is characterized in that, even after storage for a long time, the Mooney viscosity rises only to a very slight extent, and the rebound, wet skid resistance and other physical properties of the cured product thereof are not substantially changed.

REFERENCES:
patent: 4239860 (1980-12-01), Hergenrother et al.
patent: 4616069 (1986-10-01), Watanabe et al.
patent: 4753991 (1988-06-01), Bronstert

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