PARTIALLY CROSS-LINKED ESTERIFIED CELLULOSE ETHERS

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...

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Hauptverfasser:	LI, Yongfu, SPREHE, Matthias, BRACKHAGEN, Meinolf, PETERMANN, Oliver, GRASMAN, Nicholas, S, MEUNIER, David, M
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Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator	LI, Yongfu SPREHE, Matthias BRACKHAGEN, Meinolf PETERMANN, Oliver GRASMAN, Nicholas, S MEUNIER, David, M
description	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.
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subjects	CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES THEIR PREPARATION OR CHEMICAL WORKING-UP
title	PARTIALLY CROSS-LINKED ESTERIFIED CELLULOSE ETHERS
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