METHOD FOR INCORPORATING ACTIVE AGENTS INTO A HYDROPHILIC POLYMER FOAM

摘要

The present invention consists of a novel process for the incorporation of one or more water-soluble active agents in a hydrophilic polymer foam. Said process makes it possible in particular to obtain a hydrophilic polyurethane foam exhibiting a gradient of active agents. This process is of particular use when manufacturing hydrophilic polyurethane foams intended for medical, cosmetic and dermocosmetic purposes.

主权项

1. A process for the incorporation of at least one cosmetic or pharmaceutical water-soluble active agent in a hydrophilic polymer foam, comprising the stages of:
a) deposition of the water-soluble active agent on an impermeable nonporous support, b) preparation of a precursor mixture of the foam in the form of an aqueous dispersion comprising either monomers or prepolymers, c) pouring the mixture obtained in stage b) over the active agent which has been deposited on the support at the end of stage a), d) polymerization and production of the hydrophilic polymer foam incorporating the water-soluble active agent, e) drying the hydrophilic polymer foam.