Patent · US Active

Composition comprising an organic liquid diluent and a cellulose ether of very low viscosity

US11000594B2 · kind B2 · utility

0Cited by

11References

11Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Meinolf Brackhagen · Walsrode, DE
Nicholas S. Grasman · Midland, US
Mark J. Hall · Gaylord, US
Steven J. Guillaudeu · Midland, US
Robert L. Schmitt · Stuart, US
Matthias Knarr · Nienburg/Weser, DE

Key dates

Filing date	Mar 19, 2019
Grant date	May 11, 2021
Priority date	—
Expiry date	Mar 19, 2039

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L1/284
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A liquid composition which comprises an organic liquid diluent and at least one non-ionic cellulose ether having a viscosity of up to 2.33 mPa·s, measured as a 2 wt.-% solution in water at 20° C., is stable over an extended time period. The liquid composition is useful for preparing a solid dispersion comprising at least one active ingredient in at least one cellulose ether by spray-drying. Alternatively a solid dispersion can be produced by blending and extruding at least one active ingredient, at least one cellulose ether having a viscosity of up to 2.33 mPa·s and optionally one or more adjuvants.

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