公开(公告)号：US11208522B2

公开(公告)日：2021-12-28

申请号：US16734911

申请日：2020-01-06

Applicant: Stepan Company

Inventor： Michael Edward O'Brien ,  Jeffrey R. Janos ,  Scott Yin

IPC: C08G18/42 ,  C08L67/02 ,  C08L67/04 ,  C08L75/06 ,  C08G18/10 ,  C08G18/73 ,  C08G18/76 ,  C08G18/78 ,  C08G18/79 ,  C08G63/08 ,  C08G63/181 ,  C08G63/199 ,  C08K5/17 ,  C08K5/353

Abstract: Lactide-based random polyester polyols for use in polyurethane compositions are disclosed. The polyester polyols have an OH value in the range of greater than 400 mg KOH/g up to 1100 mg KOH/g and are the reaction product of at least one polycarboxylic acid, at least one lactide, and one or more polyalcohols. The polyester polyols can be formulated into the B-side of a two part polyurethane composition to obtain a polyurethane having improved hardness and solvent resistance and a low VOC content. The polyurethane composition is particularly suitable for polyurethane coating applications.