Lignin-containing polyester polyols and their preparation using a urethane adhesive

Lignin-containing polyester polyols and their preparation using a polyurethane adhesive, it relates to a polyester polyol and a polyurethane adhesive using the preparation thereof. The present invention is to solve the aliphatic polyester polyurethane adhesive prepared by conventional methods of heat resistance is poor, there is a problem of low utilization of lignin. Lignin-containing polyester polyol lignin vacuum melting method, the catalyst, glycols, polyhydric alcohols and aliphatic dibasic acid prepared from. It prepared using lignin-containing polyester polyol polyurethane adhesive fraction consisting of separate packs of Group A, Part B and individually packaged individually packaged Part A solvent composition. The polyester polyols of the present invention is a process for their preparation and the use of lignin-containing synthesis of polyurethane adhesive.