The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 2026
Filed:
Aug. 20, 2020
Applicant:
Hanwha Solutions Corporation, Seoul, KR;
Inventors:
Yujin Sim, Daejeon, KR;
Juyoung Park, Daejeon, KR;
Byeong Hyeon Lee, Daejeon, KR;
Sanghyun Cho, Daejeon, KR;
Assignee:
HANWHA SOLUTIONS CORPORATION, Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 5/13 (2006.01); C08G 18/08 (2006.01); C08G 18/32 (2006.01); C08G 18/76 (2006.01);
U.S. Cl.
CPC ...
C08K 5/13 (2013.01); C08G 18/089 (2013.01); C08G 18/3206 (2013.01); C08G 18/7642 (2013.01);
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.