Method for preparing functionalized block copolymers

Details Method for preparing functionalized block copolymers Method for preparing functionalized block copolymers

1988-06-27

1990-05-01

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

252 56R, 252 56S, 5255261, 525192, 525197, 525301, 585 12, C10M10702, C10M14510

Patent

active

049216252

ABSTRACT:
A process for incorporating carboxy and/or carboxyl derivative functionality into a hydrocarbon polymer which is substantially free of ethylenic unsaturation. The functionalization is accomplished by contacting the functionalizing agent or agents with the polymer in the presence of a free radical initiator in a blending apparatus capable of imparting high mechanical energy into the reaction medium. The blending apparatus is preferably an extruder and most preferably a non-intermeshing twin screw extruder. The amount of degradation resulting from the presence of a free radical initiator and the high mechanical shear at the elevated temperatures employed during the contacting is reduced by effecting the contacting in a suitable diluent. Similarly, the amount of polymer crosslinking and/or coupling is reduced through the use of a suitable diluent. The polymer is maintained in the molten phase during the reaction.

REFERENCES:
patent: 4160739 (1979-07-01), Slambaugh et al.
patent: 4533482 (1985-08-01), Bollinger
patent: 4693838 (1987-09-01), Varma et al.
patent: 4749505 (1988-06-01), Chung et al.
patent: 4780228 (1988-10-01), Gardiner et al.
patent: 4803003 (1989-02-01), Chung
patent: 4822508 (1989-04-01), Pennewiss et al.

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