Ring-opening polymerization of cyclic ethers

Details Ring-opening polymerization of cyclic ethers Ring-opening polymerization of cyclic ethers

1993-11-24

1994-12-06

Prescott, Arthur C.

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

Organic compounds

Carboxylic acid esters

C07C 6724

Patent

active

053712765

ABSTRACT:
A method for preparing ester end-capped polyalkylene ether is disclosed. Cyclic ether monomers are subjected to ring-opening polymerzation at a temperature of 20.degree.-80.degree. C. and a pressure of 0-10 atm in the presence of a solid acid serving as catalyst and a mixture of acid and acid anhydride serving as a promoter. The solid acid is an oxide of group III and group IV elements and has been modified by sulfuric acid, ammonium sulfate or ammonium sulfite.

REFERENCES:
patent: 4680358 (1987-07-01), Yu
patent: 4786703 (1988-11-01), Starner et al.
patent: 4847332 (1989-07-01), Yu
patent: 4959481 (1990-09-01), Axelrod et al.
patent: 4968746 (1990-11-01), DeRudder et al.

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