Patent ID: 6824820
Filing Date: 2004-11-30
Classification: C08G,C09J,Y10T

Abstract:
An adhesive composition comprisinga silicone free polyurea-based polymer, comprising a segmented copolymer, wherein the copolymer comprises repeating units of Formula I: wherein:each B is independently a polyvalent radical selected from a group consisting of arylene, aralkylene, cycloalkylene, polyoxyalkylene, or mixtures thereof; each D is independently selected from the group consisting of hydrogen, an alkyl group, a cycloalkyl group, a phenyl group, a group that completes a ring structure that includes B to form a heterocycle, and mixtures thereof; each Z is independently a polyvalent radical having about 1 to about 20 carbon atoms; each Y is independently a polyoxyalkylene; m is an integer greater than zero; and a is zero or an integer greater than zero; and wherein the composition comprises a tackifier in an amount sufficient to provide the adhesive composition as a pressure sensitive adhesive and in an amount less than about 45 parts by weight tackifier per hundred part by weight polyurea-based polymer.