Process for producing dispersion of esterified cellulose ether

A process for producing an aqueous composition comprising a dispersed esterified cellulose ether comprising the steps of

• grinding, in the presence of an aqueous diluent, at least one 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,
• blending at least one salt of a fatty acid and optionally one or more adjuvants with the esterified cellulose ether before, during or after the grinding of the esterified cellulose ether and choosing the amounts of aqueous diluent, esterified cellulose ether, salt of a fatty acid, and optionally one or more adjuvants that the produced aqueous composition comprises at least 25 percent of the dispersed esterified cellulose ether, based on the total weight of the aqueous composition, and
• heating the aqueous composition to a temperature of from 37 to 80° C. during or after the grinding step.