Preparation of polyesters from polyethers by an ester-insertion

Details Preparation of polyesters from polyethers by an ester-insertion Preparation of polyesters from polyethers by an ester-insertion

1992-11-23

1994-06-07

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525404, 525408, 525530, 525537, C08L 6700

Patent

active

053190068

ABSTRACT:
Polyesters are prepared by a new ester-insertion reaction of a polyether and a cyclic anhydride in the presence of a Lewis acid catalyst. The process is advantageously used to convert polyether polyols recovered from polyurethanes into curable unsaturated polyester resins.

REFERENCES:
The Cleavage of Ethers, Department of Chemistry, Northwestern University, Robert L. Burwell, Jr., (1954), pp. 615-685.
Ferric Chloride in Acetic Anhydride. A Mild 2nd Versatile Reagant for the Cleavage of Ethers, Bruce Ganem and Vernon R. Small, Jr., J. Org. Chem. vol. 39, No. 25, 1974, pp. 3728-3730.
Cleavage Reactions of Optically Active Secondary Butyl Methyl Ether, Contribution from the Department of Chemistry of Northwestern University, Robert C. Burwell, Jr., Lloyd M. Elkin and Lucien G. Maury, vol. 73, pp. 2428-2431.

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