Method for producing shaped functional cellulose articles with targeted release of active ingredients

US10905645B2 · kind B2 · utility

Assignee

• smartpolymer GmbH · DE

Inventors

• Ralf Bauer · Neckarsulm, DE
• Frank Meister · Rudolstadt, DE
• Michael Mooz · Ziegenrück, DE
• Markus Krieg · Weimar, DE
• Sabine Riede · Orlamünde, DE

Key dates

• Filing date: Dec 9, 2015
• Grant date: Feb 2, 2021
• Expiry date: Apr 9, 2036

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D10B2509/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Methods for producing cellulose articles having controlled release of active ingredient include dispersing pulp in aqueous direct solvent for cellulose to form a slurry. Organically modified or ion-exchange-activated phyllosilicate is homogenized in a direct solvent for cellulose with exfoliation by shearing, then mixed with the slurried pulp. A mixture of active ingredient and a lipophilic matrix material or a water-in-oil (“W/O”) emulsion containing active ingredient is stabilized with thickener, converted into a gel-like paste, and mixed with the slurried pulp. Water is stripped from the mixture until all cellulose is dissolved, the mixture is formed into shaped articles, and dried. Exemplary active ingredients include cosmetic active ingredients, fat-soluble vitamins or apolar plant extracts. Domains of active ingredient and matrix material or emulsion containing active ingredient are present as fine divisions within the inventive articles. Exemplary shaped articles include functional fibers in knitted, woven and nonwoven fabrics; paper; foils and membranes.