PREPARATION OF LIQUID POLYMER - GEN TIRE & RUBBER CO

Title:

PREPARATION OF LIQUID POLYMER

Document Type and Number:

Japanese Patent JPS529090

Kind Code:

A

Abstract:

This invention relates to the preparation of solution polymers and rubbers from vinyl monomers using a new catalyst complex of a barium di-tert-alkoxide-hydroxide salt and an organic lithium compound. In particular, homopolymers and copolymers of butadiene with styrene and/or isoprene, prepared with this catalyst, are uniquely characterized by the butadiene units having a low vinyl content (not over about 12%) and a trans-1,4 structure of from about 70 to 81%. Also, the copolymer has a random comonomer sequence distribution. This molecular structure permits elastomers containing little or no styrene to have sufficient stereoregularity to crystallize. Furthermore, the butadiene homopolymer and copolymer with styrene and/or isoprene exhibit a broad molecular weight distribution as well as tack and green-strength which are valuable properties for a rubber to possess when building tires.

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Inventors:

AIBAN GUREN HAAGISU
RATSUSERU ANSONII RIBIKUNII
SANDAA RARU AGAWAARU

Application Number:

JP4381476A

Publication Date:

January 24, 1977

Filing Date:

April 19, 1976

Export Citation:

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Assignee:

GEN TIRE & RUBBER CO

International Classes:

C08F4/00; C07C27/00; C07C31/30; C07C67/00; C07F3/00; C08F2/00; C08F2/04; C08F2/06; C08F4/06; C08F4/10; C08F4/42; C08F4/46; C08F4/50; C08F12/06; C08F36/00; C08F36/04; C08F36/06; C08F36/08; (IPC1-7): C08F4/54; C08F11/02; C08F36/04; C08F212/08

Domestic Patent References:

JPS473728A

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