HYPROMELLOSE ACETATE SUCCINATE AND METHOD FOR PRODUCING HYPROMELLOSE ACETATE SUCCINATE

EPO Patent Application EP 3290/444 A1
Application Date: Mar. 7th, 2018

ABSTRACT

Provided is a method for producing HPMCAS capable of reducing the average particle size of HPMCAS particles to an intended range without a pulverization step. Specifically provided is a method...
Assignee(s):
Inventor(s):
Yoshida, Mitsuhiro
Matsubara, Junichi
Kikuchi, Kazuki
Application Number:
17187808.5
International Classification:
C08B 13/00 (20060101)
No Pictures Available

CLAIMS

What is claimed is:

A method for producing hypromellose acetate succinate, comprising: an esterification step of reacting hypromellose with esterification agents in the presence of a catalyst to obtain a reaction solution containing crude hypromellose acetate succinate;a precipitation step of mixing the reaction solution with water to precipitate the crude hypromellose acetate succinate, thereby obtaining...

DESCRIPTION

BACKGROUND OF THE INVENTION

The invention relates to hypromellose acetate succinate and a method for producing hypromellose acetate succinate.
Back to Top