Patent ID: 6716913
Filing Date: 2004-04-06
Classification: C07C,C08G

Abstract:
A carboxyl-containing monomer for use in preparing a polyurethane polymer, said carboxyl-containing monomer being the reaction product of a low molecular weight polyol compound selected from the group consisting of glycerol, trimethylolpropane, trimethylolethane, polyether polyols, and combinations thereof and an acid anhydride selected from the group consisting of maleic anhydride, phthalic anhydride, succinic anhydride, glutaric anhydride, and mixtures thereof, said reaction product being produced in the presence of 5-500 ppm phosphoric acid, said carboxyl-containing monomer having a viscosity in the range of about 3,000-100,000 centipoise, and having free oligomer content of less than 30 mg KOH/g.