Preparation of barium-alkoxide salts

Details Preparation of barium-alkoxide salts Preparation of barium-alkoxide salts

1979-09-20

1981-04-07

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526173, 526176, 568840, 568852, C08G 800, C08G 1404

Patent

active

042607124

ABSTRACT:
The characteristics of barium t-alkoxide salts used with organolithium compounds as catalyst complexes in the solution polymerization of unsaturated or oxirane monomers to make polymers such as rubbers is improved by reducing or eliminating the nitrogen content of the barium salt and, further, by using a certain mixture of tertiary carbinols and water in forming the barium salt. In certain instances water may be eliminated.

REFERENCES:
patent: 3629213 (1971-12-01), Onishi et al.
patent: 3992561 (1976-11-01), Hargis et al.
patent: 4020115 (1977-04-01), Hargis et al.
patent: 4033900 (1977-07-01), Hargis et al.
"Copolymerization of Butadiene and Styrene", by Fujio et al., J. Chem. Soc., Japan (1972), pp. 447-453.

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