US 2017/0319462 A1 · THERMOPLASTIC POLYURETHANE FILM FOR DELIVERY OF ACTIVE AGENTS TO SKIN SURFACES

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.

Claims76

Dependent claims

A polymer film comprising:

a) 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;
and
optionally, a catalyst;
and
b) up to 5 wt. % water.

8 more elements

Dependencies are inferred from the claim text.

Thermoplastic polyurethane film for delivery of active agents to skin surfaces

Life of this patent

Thermoplastic polyurethane film for delivery of active agents to skin surfaces

Life of this patent

Abstract

Claims76