Polymerization process

Details Polymerization process Polymerization process

1977-01-13

1978-12-12

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526174, 526176, 526177, 526178, 526180, 526181, C08F 452

Patent

active

041297059

ABSTRACT:
Homopolymers of conjugated dienes and copolymers of conjugated dienes with vinyl aromatic compounds or with other conjugated dienes having improved properties and an elastomeric character are prepared by use of a catalytic composition which comprises (a) an organo-lithium initiator and (b) a tercatalyst system comprising (b.sub.1) a compound of barium or strontium or calcium, (b.sub.2) an organometallic compound of a metal of Group 2B or 3A of the Mendeleev periodic table of elements and (b.sub.3) an alkali metal alcoholate ether or amine.

REFERENCES:
patent: 3607851 (1971-09-01), Forman
patent: 3716495 (1973-02-01), Asich

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