Dispersion comprising an esterified cellulose ether

US10383944B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Neal J. Fetner · Midland, US
• David L. Malotky · Midland, US
• Jin Zhao · Framingham, US
• Matthias Knarr · Nienburg/Weser, DE
• Michael J. Devon · Midland, US
• Roland Adden · Bad Fallingbostel, DE

Key dates

• Filing date: Mar 3, 2015
• Grant date: Aug 20, 2019
• Expiry date: Mar 3, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L1/32
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

An aqueous composition useful for producing capsules shells comprises a) at least one dispersed 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 aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, and b) from 0.05 to 20 percent of at least one salt of a fatty acid, based on the weight of the dispersed esterified cellulose ether, wherein the median particle size, d50, of the dispersed esterified cellulose ether particles is up to 7 micrometers, such median particle size (d50) being the size at which 50 mass percent of the particles have a smaller equivalent diameter and 50 mass percent have a larger equivalent diameter.