Thermoplastic polyurethane film for delivery of active agents to skin surfaces

US10905646B2 · kind B2 · utility

Inventors

• Nancy S. Marchant · Medina, US
• Pallavi Kulkarni · Woburn, US
• Anthony J. Walder · Franklin, US
• Paul M. Basone · Akron, US
• Shawn Lankowski · Danvers, US
• Juan Cebrian Puche · Barcelona, ES
• Sandra Mendez · Gavà, ES
• Mireia Martin · Gavà, ES

Key dates

• Filing date: Oct 23, 2015
• Grant date: Feb 2, 2021
• Expiry date: Sep 17, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/04
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A polymer film suited to use as a face mask or transdermal patch includes at least 30 wt. % of a thermoplastic polyurethane polymer which is the reaction product of a first polyether polyol having a molecular weight of at least 3000 daltons, optionally, a second polyether polyol having a molecular weight of no more than 2500 daltons, at least one of a third polyol having a molecular weight of up to 800 daltons, and a chain extender, a diisocyanate, optionally, a catalyst. The film includes up to 5 wt. % water.