Patent · US Active

Aqueous composition comprising dispersed esterified cellulose ether

US11142633B2 · kind B2 · utility

0Cited by

5References

21Claims

0Family size

Assignee

NUTRITION & BIOSCIENCES USA 1, LLC · US

Inventors

Oliver Petermann · Hamburg, DE
Matthias Knarr · Nienburg/Weser, DE
Meinolf Brackhagen · Walsrode, DE

Key dates

Filing date	Sep 29, 2016
Grant date	Oct 12, 2021
Priority date	—
Expiry date	Feb 28, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/025
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.