Process for making a polyetherester

Details Process for making a polyetherester Process for making a polyetherester

1994-03-30

1995-07-25

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528272, 528274, 528275, 528280, 528281, 528282, 528283, 528286, 528306, 528307, 524711, 524773, 524777, 524783, 524784, 524785, 524786, 524845, 525437, 522 1, 522 93, 522102, C08G 6382

Patent

active

054363136

ABSTRACT:
An improved process for making polyetheresters is disclosed. A polyether is reacted with an anhydride in the presence of a strong protic acid or a metal salt of a strong protic acid in an amount effective to promote insertion of the anhydride into carbon-oxygen bonds of the polyether to produce the polyetherester. Polyetheresters made by the process of the invention are useful in a wide variety of applications, particularly in the polyurethane and unsaturated polyester industries.

REFERENCES:
patent: 5254723 (1993-10-01), Yang et al.
patent: 5319006 (1994-06-01), Yang et al.
Burwell, Jr., "The Cleavage of Ethers", Chem. Rev. (1954) 615.

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