Low viscosity terminally functionalized isoprene polymers

Details Low viscosity terminally functionalized isoprene polymers Low viscosity terminally functionalized isoprene polymers

1993-12-01

1994-12-27

Zitomer, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526194, 526335, 5263402, C08F 458, C08F 448, C08F13608

Patent

active

053767454

ABSTRACT:
The anionic polymerization of isoprene with monolithium initiators and functionalized initiators having the structure R.sup.1 R.sup.2 R.sup.3 Si--O--A'--Li wherein R.sup.1, R.sup.2, and R.sup.3 are preferably alkyl, alkoxy, aryl, or alkaryl groups having from 1 to 10 carbon atoms, and A' is preferably a branched or straight chain bridging group having at least 2 carbon atoms produces unsaturated and hydrogenated isoprene polymers having high 1,4-addition of the isoprene, from about one to two terminal functional groups per molecule, and low viscosity.

REFERENCES:
patent: Re27145 (1971-06-01), Jones
patent: 4417029 (1983-11-01), Milkovich
patent: 4518753 (1985-05-01), Richards et al.
patent: 4753991 (1988-06-01), Bronstert
patent: 4791174 (1988-12-01), Bronstert et al.
patent: 4970254 (1990-11-01), Willis et al.
patent: 5166277 (1992-11-01), Goodwin et al.

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