Polymerization catalyst and process for polymerizing dienes ther

Details Polymerization catalyst and process for polymerizing dienes ther Polymerization catalyst and process for polymerizing dienes ther

1980-05-27

1981-07-28

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252431L, 526180, C08F 448

Patent

active

042809274

ABSTRACT:
The catalyst system disclosed herein comprises a combination or a chelate of a hydrocarbyl lithium compound with a dialkylaminoaldehyde dialkyl acetal having the formula R'.sub.2 N-A-CH(OR.sub.2) wherein R and R'are alkyl groups of 1-3 carbon atoms and A is a divalent aliphatic group of 1-10, preferably 1-3 carbon atoms, with a direct linkage of no more than 3 carbon atoms between the N and the --CH(OR).sub.2 group. This catalyst system is particularly useful in the polymerization of vinyl compounds such as ethylene, propylene, styrene, butadiene, etc. The process for the polymerization of conjugated dienes produces polymers of excellent properties. For example, with butadiene-1,3 and other appropriate conditions, polybutadiene with high percentages of 1,2-polybutadiene structure are produced.

REFERENCES:
patent: 3451988 (1969-06-01), Langer
patent: 3639380 (1972-02-01), Screttas

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