Zinc-containing solid catalyst, process of preparing same and pr

Details Zinc-containing solid catalyst, process of preparing same and pr Zinc-containing solid catalyst, process of preparing same and pr

1989-08-03

1991-01-01

Nielsen, Earl

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

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

502151, 502170, C08G 6434

Patent

active

049819488

ABSTRACT:
According to the present invention, a zinc-containing solid catalyst prepared by contacting zinc oxide with an organic dicarboxylic acid in the presence of or in the absence of an organic solvent under a mechanical pulverization treatment is provided. The catalyst is in a good pulverized state and exhibits a high catalytic activity for polymerization of carbon dioxide with an epoxide to obtain a polyalkylene carbonate.

REFERENCES:
patent: 3699079 (1972-10-01), Haynes
patent: 3706713 (1972-01-01), Hull et al.
patent: 3953383 (1976-04-01), Inoue et al.
patent: 4686276 (1987-08-01), Myers
patent: 4783445 (1988-11-01), Sun
patent: 4789727 (1988-12-01), Sun
Die Makromolekulare Chemie-Rapid Communications, vol. 1, No. 12, Dec. 1980, pp. 775-777, Heidelberg, DE; S. Inoue: "Novel Zinc Carboxylates as Catalysts for the Copolymerization of Carbon Dioxide with Epoxides".
Polymer Journal, vol. 13, No. 4, 1981, pp. 407-410, K. Soga et al: "Alternating Copolymerization of CO.sub.2 and Propylene Oxide with the Catalysts Prepared from Zn(OH).sub.2 and Various Dicarboxylic Acids".

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