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:
Dec. 23, 2025
Filed:
Jul. 17, 2023
SK Pucore Co., Ltd, Ulsan, KR;
Woori Fine Chem Co., Ltd., Gyeonggi-do, KR;
Jaeyoung Pai, Gyeonggi-do, KR;
Jeongmoo Kim, Gyeonggi-do, KR;
Hyuk Hee Han, Gyeonggi-do, KR;
Jung Hwan Myung, Gyeonggi-do, KR;
Jooyoung Jung, Gyeonggi-do, KR;
Myung-Ok Kyun, Gyeonggi-do, KR;
SK PUCORE CO., LTD, Ulsan, KR;
WOORI FINE CHEM CO., LTD., Gyeonggi-do, KR;
Abstract
The diamine composition according to an embodiment of the present invention comprises a benzylmonoamine having a methyl group in an amount of 10 ppm to 2,000 ppm in the composition. When it is used for the preparation of a diisocyanate composition and an optical material, it is possible to improve the optical characteristics by preventing the occurrence of yellowing, striae, and cloudiness in the optical material and enhancing the mechanical properties such as impact resistance at the same time. Thus, the diisocyanate composition can be applied to the preparation of a plastic optical lens of high quality.