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:
Jul. 30, 2024
Filed:
Dec. 04, 2020
Skc Co., Ltd., Gyeonggi-do, 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;
Myung-Ok Kyun, Gyeonggi-do, KR;
Jooyoung Jung, Gyeonggi-do, KR;
SK PUCORE CO., LTD., Ulsan, KR;
WOORI FINE CHEM CO., LTD., Gyeonggi-Do, KR;
Abstract
The diisocyanate composition according to an embodiment of the present invention comprises, in the composition, a benzyl isocyanate having a methyl group in an amount of 5 ppm to 200 ppm, an aromatic compound having a halogen group in an amount of 5 ppm to 1,000 ppm, a benzyl isocyanate having an ethyl group in an amount of 1 ppm to 1,000 ppm, or a combination thereof. It is possible to improve the optical characteristics by preventing the occurrence of yellowing, striae, and cloudiness and to enhance the mechanical properties such as impact resistance at the same time. Thus, it can be advantageously used to prepare an optical material of high quality.