Method for producing polyoxalkylene derivative

Details Method for producing polyoxalkylene derivative Method for producing polyoxalkylene derivative

2010-03-26

2011-11-29

Boykin, Terressa (Department: 1765)

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

Synthetic resins

From carboxylic acid or derivative thereof

C526S262000, C526S285000, C526S322000

Reexamination Certificate

active

08067526

ABSTRACT:
A method for producing a polyoxyalkylene derivative including: step (A) in which a polyoxyalkylene derivative having hydroxyl group(s) is reacted with a phthalimide derivative in the presence of an azo reagent and a phosphine reagent; step (B) in which the phthalimide groups of the compound obtained in step (A) are deprotected using a compound having a primary amino group; and step (C) in which impurities derived from the phthalimide derivative and the deprotection reagent are removed by adsorption or extraction.

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patent: 07-196925 (1995-08-01), None
patent: 2007-501811 (2007-02-01), None
patent: 96/41813 (1996-12-01), None
patent: 2005/014035 (2005-02-01), None

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