Modified Lewis acid catalyzed polymerization

Details Modified Lewis acid catalyzed polymerization Modified Lewis acid catalyzed polymerization

1986-07-24

1988-10-25

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526185, 526186, 526339, 5263486, 5263487, C08F 214, C08F 1008, C08F 1010, C08F 414

Patent

active

047805137

ABSTRACT:
Protection against molecular weight depression in the polymerization reaction producing polyisobutylene rubber or butyl rubber is achieved through addition of minor amounts of certain metal alkyls, particularly the lower alkyl aluminum compounds or lower alkyl aluminum hydrides which function as buffering, neutralizing or complexing agents against polymerization poisons and extraneous catalyst activators.

REFERENCES:
patent: 3159607 (1964-12-01), D'Alelio
patent: 4252710 (1981-02-01), Powers
patent: 4269955 (1981-05-01), Wagensommer

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