Process for production of propylene oxide/ethylene oxide block c

Details Process for production of propylene oxide/ethylene oxide block c Process for production of propylene oxide/ethylene oxide block c

1999-05-28

2000-02-08

Wilson, Donald R.

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

Synthetic resins

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

568620, C08G 6510, C07C 4311

Patent

active

060229454

ABSTRACT:
A catalyst for the polymerization of an alkylene oxide compound is disclosed. This catalyst is composed of a phosphazene compound or a phosphazenium salt which is derived from the phosphazene compound and an active hydrogen compound. A poly(alkylene oxide) can be efficiently produced by polymerizing the alkylene oxide compound in the presence of the catalyst and, when the catalyst is composed of the phosphazene compound, the active hydrogen compound. The poly(alkylene oxide) contains no metal component and compared with those produced using conventional amine-base catalysts, has also been improved significantly in odor.

REFERENCES:
patent: 3829505 (1974-08-01), Herold
Martin Moller et al, "Anionic Polymerization of Oxirane in the Presence of the Polyiminophosphazene Base t-Bu-P.sub.4 ", Macromol. Rapid Commun., 17,143 (1996).
Martin Moller et al, "Polymerization of Ethylene Oxide with Alkyllithium Compounds and the Phosphazene Base t-Bu-P.sub.4 ", Angew. Chem. Int. Ed. Engl., 35, 623, (1996).
Martin Moller et al, "Use of Polyiminophosphazene Bases for Ring-Opening Polymerizations", Macromol. Symp., 107, 331 (1996).
Tang J. et al, J. Am. Chem. Soc., "Synthesis of New Exceedingly Strong Non-ionic Bases", vol. 115, 1993, pp. 5015-5020, XP002022367.
Schwesinger R. et al, Angew Chem. Int. Ed. Engl., "Peralkylated Polyaminophoshazenes", vol. 26, No. 11, 1987, pp. 1167-1169, XP002022574.
Esswein B. et al, Chemical Abstracts, "Use of Polyiminophosphazene Bases for Ring-opening Polymerisations", vol. 125, No. 02, 1996, pp. 331-340, XP002022368 *abstract* & Macromolekular Sympos., No. 17, 1996, pp. 331-340 .

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