Productive process for making conventional and low-unsaturation

Details Productive process for making conventional and low-unsaturation Productive process for making conventional and low-unsaturation

1993-05-06

1994-11-15

Mars, Howard T.

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

Organic compounds

Oxygen containing

568618, 568621, 564475, 564505, C07C 4103, C07C21300

Patent

active

053649737

ABSTRACT:
A productive process for making conventional and low-unsaturation polyether polyols is disclosed. The process involves continuous removal of allyl alcohol and lower allyl alcohol propoxylates from the polyol during manufacture. The process can be performed at high temperatures and/or low catalyst concentrations. Polyether polyols with exceptionally low monol contents can be prepared.

REFERENCES:
patent: 3278459 (1966-10-01), Herold et al.
patent: 3829505 (1974-08-01), Herold et al.
patent: 5010187 (1991-04-01), Heuvelsland
patent: 5013042 (1992-04-01), Durvasula et al.
patent: 5114619 (1992-05-01), Heuvelsland
Preparation of High Molecular Weight Polyols Using Double Metal Cyanide Catalysts, 32nd Annual Polyurethane Technical Marketing Conference, Oct. 1-4, 1989 J. L. Schuchardt & S. D. Harper, pp. 360-364.
HMW Polyether Polyols Yield Improved PU Cast Elastomers and Sealants, by John W. Reisch and Deborah M. Capone, Elastomerics, Apr. 1991, pp. 18-23.

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