Process for making a polyetherester by insertion of a carboxylic

Details Process for making a polyetherester by insertion of a carboxylic Process for making a polyetherester by insertion of a carboxylic

1996-05-14

1997-03-11

Acquah, Samuel A.

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

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

528272, 528274, 528275, 528280, 528281, 528282, 528283, 528286, 528306, 528307, 524711, 524773, 524777, 524783, 524784, 524785, 524786, 524845, 525445, 522 1, C08F 246, C08J 328

Patent

active

056102054

ABSTRACT:
A process for making polyetheresters is disclosed. A polyether is reacted with a carboxylic acid in the presence of a strong protic acid or a metal salt of a strong protic acid to promote insertion of the carboxylic acid into polyether carbon-oxygen bonds to produce a polyetherester. The polyetheresters are useful for various applications 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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