Water-soluble esterified cellulose ethers
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United States of America Patent
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Aug 13, 2019
Grant Date -
Mar 15, 2018
app pub date -
Mar 8, 2016
filing date -
Mar 16, 2015
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Abstract
1. An esterified cellulose ether which i) comprises groups of the formula —C(O)—R—COOH or a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOH, wherein R is a divalent hydrocarbon group, ii) has a weight average molecular weight Mw of up to 70,000 Dalton, iii) has a degree of neutralization of the groups —C(O)—R—COOH of not more than 0.4, and iv) has a solubility in water of at least 2.0 weight percent at 2° C., is useful for preparing enteric capsules.
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