Highly active double metal cyanide catalysts

Details Highly active double metal cyanide catalysts Highly active double metal cyanide catalysts

1997-01-08

1998-08-04

Wood, Elizabeth D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

525403, 525409, 528403, 528412, 528414, 528415, 528419, 528421, C07C 4103, C07C 4310, C07C 4313, C08G 5968

Patent

active

057896267

ABSTRACT:
Highly active double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC complex, and organic complexing agent, and from about 5 to about 80 wt. %, based on the amount of catalyst, of a polyether having a number average molecular weight less than about 500. The catalysts polymerize propylene oxide at a rate in excess of about 1 kg PO/g Co/min. at 100 ppm catalyst, based on the weight of finished polyether, at 105.degree. C. The catalysts, which are easy to prepare, give polyether polyols with exceptionally low unsaturation levels.

REFERENCES:
patent: 3829505 (1974-08-01), Herold
patent: 4477589 (1984-10-01), van der Hulst et al.
patent: 5158922 (1992-10-01), Hinney et al.
patent: 5482908 (1996-01-01), Le Khac
patent: 5536883 (1996-07-01), Le-Khac

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