公开(公告)号：US20220306835A1

公开(公告)日：2022-09-29

申请号：US17637147

申请日：2020-08-20

Applicant: Hanwha Solutions Corporation

Inventor： Yujin SIM ,  Juyoung PARK ,  Byeong Hyeon LEE ,  Sanghyun CHO

IPC: C08K5/13 ,  C08G18/76 ,  C08G18/32 ,  C08G18/08

Abstract: There is provided a method for preparing a polyisocyanate composition capable of improving transparency of a product, by mixing a phenol-based stabilizer in an amount of 1 to 1000 ppmw, based on the total weight of aromatic diisocynate, and then, introducing polyhydric alcohol to conduct a polymerization reaction, thereby inhibiting coloration and whitening due to oxygen or moisture during synthesis and purification processes.