Polyurethane/polyurea matrices for the delivery of active agents

摘要

This invention relates to a polyurethane/urea matrix for the delivery of active agents. The polyurethane/urea matrix is prepared by a process of reacting a urethane prepolymer with an aromatic diamine chain extender in the presence of an active agent which is a fragrance agent or an insect repellant agent. This invention also relates to a process for making the polyurethane/urea matrices as well as the products in which the polyurethane/urea matrices may be incorporated.