Promoters in the polymerization of monovinyl-aromatic compounds

Details Promoters in the polymerization of monovinyl-aromatic compounds Promoters in the polymerization of monovinyl-aromatic compounds

Filed on

1977-04-01

Date issued

1978-05-09

Examiner

Hamrock, William F.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

Polymers from only ethylenic monomers or processes of...

Other Related Categories

260878B, 260879, C08F 1208, C08F 1212

Type

Patent

Status

active

Patent number

040888134

Description

ABSTRACT:
1,1-DIALKYLETHYLENES, SUCH AS ISOBUTENE, PROMOTE THE PRIMARY LITHIUM INITIATED POLYMERIZATION OF MONOVINYL-AROMATIC COMPOUNDS, SUCH AS STYRENE, EITHER IN HOMOPOLYMERIZATIONS, OR IN THE FORMATION OF A--B--A block copolymers or (A--B).sub.a Z radial block copolymers, such as by sequential monomer addition with conjugated dienes.

REFERENCES:
patent: 2802806 (1957-08-01), Doak
patent: 3030346 (1962-04-01), Cooper
patent: 3031432 (1962-04-01), Kern
patent: 3551522 (1970-12-01), Miles
patent: 3631006 (1971-12-01), Hawkins
patent: 3992483 (1976-11-01), Willis
patent: 3993853 (1976-11-01), Selman et al.
Org. Chem. of Syn. High Polymers by Lenz, pp. 412-413; Interscience Pub. 1967.

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