Patent ID: 6576702
Filing Date: 2003-06-10
Classification: A61K,A61Q,C08G,C08K

Abstract:
A polyurethane dispersion that is the product of a process comprising:(a) reacting (1) at least one polyisocyanate having an average of about two or more isocyanate groups, and (2) at least one active hydrogen containing compound selected from polyester polyols, polycarbonate polyols, polysiloxane polyols, ethoxylated polysiloxane polyols, and mixtures thereof, and (3) at least one water dispersability enhancing compound having at least one hydrophilic, ionic or potentially ionic group in order to form an isocyanate terminated prepolymer; wherein an effective amount of at least one plasticizer is introduced into the reaction at any time during prepolymer formation; and (b) subsequently (1) dispersing said prepolymer in water, and (2) chain extending said prepolymer by reaction with at least one of water, inorganic or organic polyamine having an average of about 2 or more primary and/or secondary amine groups, or combinations thereof.