Oliver Petermann,Matthias Knarr,Meinolf Brackhagen
申请号：
US15764498
公开号：
US20180282526A1
申请日:
2016.09.29
申请国别(地区):
US
年份:
2018
代理人:
摘要：
An aqueous composition which is useful for producing coatings and capsule shells comprises a) dispersed particles of an esterified cellulose ether comprising (i) groups of the formula —C(O)—R—COOA or (ii) a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, wherein R is a divalent hydrocarbon group and A is hydrogen or a cation, and the total degree of ester substitution is more than 0.70, and b) an esterified cellulose ether comprising aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOH, R being a divalent hydrocarbon group, wherein I) the degree of neutralization of the groups —C(O)—R—COOH is not more than 0.4, II) the total degree of ester substitution is from 0.03 to 0.70, and III) the esterified cellulose ether b) has a solubility in water of at least 2.0 weight percent at 2° C.
