Patent ID: 6375966
Filing Date: 2002-04-23
Classification: A01N,A61L

Abstract:
A polyurethane/urea matrix 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, wherein the aromatic diamine chain extender is selected from the group consisting of 4,4â€²-methylene-bis(2-chloroaniline), 4,4â€²-methylene-bis(3-chloro-2,6-diethylaniline), 4,4â€²-methylene-bis-aniline, diethyltoluenediamine, 5-tert-butyl-2,4-toluenediamine, 3-tert-butyl-2,6-toluenediamine, 5-tert-amyl-2,4-toluenediamine, 3-tert-amyl-2,6-toluenediamine, chlorotoluenediamine, and mixtures thereof.