Thermoplastic Polyurethane Film for release of active agents at Skin surfaces

摘要

Polymer Film suitable for use as a Facial Mask or transdermal patch includes at least 30% by weight of a Thermoplastic Polyurethane Polymer that is the reaction product of a First Polyether polyol has a Molecular Weight of at least 3000 daltons, optionally Second, a Polyether polyol has a Molecular Weight of not more than 2500 daltons,,At least one third of a polyol has a Molecular Weight of up to 800 daltons, and a Chain extender, a diisocyanate, optionally a Catalyst. The Film Includes up to 5% Water.