Initiator systems for polymerization of 1,3-dienes or copolymers

Details Initiator systems for polymerization of 1,3-dienes or copolymers Initiator systems for polymerization of 1,3-dienes or copolymers

1986-03-25

1987-03-03

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526174, 502153, C08F 408

Patent

active

046476350

ABSTRACT:
A process and a catalyst system is disclosed herein for preparation of medium to high vinyl (co)polymers containing a 1,2-microstructure of between 30 and about 90 percent. The catalyst system which is employed in the production of the (co)polymer is an oligomeric oxolanyl alkane modifier and anionic initiator selected from (1) Na(R).sub.3 Mg or (2) Na(R).sub.3 Mg and an organolithium compound or (3) K(R).sub.3 Mg and an organolithium compound.

REFERENCES:
patent: 3742077 (1973-06-01), Kamienski et al.
patent: 3822219 (1974-07-01), Kamienski et al.
patent: 3847883 (1974-11-01), Kamienski et al.
patent: 4429090 (1984-01-01), Hall
patent: 4429091 (1984-01-01), Hall
K. Sardelis, et al, Polymer, vol. 25, pp. 1011-1019 (Jul. 1984).

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