Title:
Partial bridge construction knot-pattern etherification cellulose ether
Document Type and Number:
Japanese Patent JP6224711
Kind Code:
B2
Abstract:
A partially cross-linked esterified cellulose ether having A) groups of the formula —C(O)—R—COOA or a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, and B) having a molecular weight distribution such that [Wf(>100 k)−Wf(>100 k)XL]/Wf(>100 k)XL is at least 0.20, wherein Wf(>100 k) is the total weight fraction of the esterified cellulose ether that exceeds 100,000 g/mol, and Wf(>100 k)XL is the weight fraction that exceeds 100,000 g/mol of the methylated esterified cellulose ether is useful as enteric polymer for pharmaceutical dosage forms.
Inventors:
Mainolf Blackhagen
Nicholas S. Glassman
Yongfu Lee
David M Mounier
Oliver Peterman
Matthias Sprehe
Nicholas S. Glassman
Yongfu Lee
David M Mounier
Oliver Peterman
Matthias Sprehe
Application Number:
JP2015528528A
Publication Date:
November 01, 2017
Filing Date:
August 15, 2013
Export Citation:
Assignee:
Dow Global Technologies LLC
International Classes:
C08B11/12; A61K9/06; A61K9/10; A61K9/14; A61K9/16; A61K9/20; A61K9/48; A61K47/38
Domestic Patent References:
| JP2008501009A | ||||
| JP54061282A |
Other References:
Journal of Pharmaceutical and Biomedical Analysis,2011年,56,743-748
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Satoshi Deno
Naori Kota
Toko Saito
Takashi Ishida
Tetsuji Koga
Satoshi Deno
Naori Kota
Toko Saito