Preparation of polyoxybutylele polyoxyalkylene glycol dicarboxyl

Details Preparation of polyoxybutylele polyoxyalkylene glycol dicarboxyl Preparation of polyoxybutylele polyoxyalkylene glycol dicarboxyl

1991-11-06

1993-06-08

Prescott, Arthur C.

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

Organic compounds

Carboxylic acid esters

528408, C07C 6724, C08G 6520

Patent

active

052181413

ABSTRACT:
Polyoxybutylene polyoxyalkylene glycol dicarboxylates are prepared by a process in which tetrahydrofuran is copolymerized with a molar excess of a 1,2-alkylene oxide in the presence of a carboxylic anhydride using, as a catalyst, a bleaching earth containing less than 3% by weight of water.

REFERENCES:
patent: 2499725 (1950-08-01), Copelin
patent: 4127513 (1978-09-01), Bellis
patent: 4153786 (1979-05-01), Pruckmayr
patent: 4189566 (1980-08-01), Mueller et al.
patent: 4228272 (1980-08-01), Del Pesco
patent: 4251654 (1981-11-01), Robinson et al.
patent: 4329445 (1982-12-01), Del Pesco
Houben-Weyl, Methoden der organischen Chemie, vol. Jun. 3, 482 (1980).
Ullmann's Enzyklopadie der technischen chemie, 3rd edition, vol. IV, 541-545 (1980).
J. Am. Chem. Soc., 70, p. 1842 (1980).

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