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:
Nov. 19, 2024
Filed:
Jun. 05, 2019
Applicant:
Woori Fine Chem Co., Ltd., Gyeonggi-do, KR;
Inventors:
Dal Seong Kim, Gyeonggi-do, KR;
Oh Joon Kwon, Gyeonggi-do, KR;
Sung Gi Lee, Gyeonggi-do, KR;
Gyeong Ha Choi, Chungcheongbuk-do, KR;
Junghwan Shin, Seoul, KR;
Assignee:
WOORI FINE CHEM CO., LTD., Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/76 (2006.01); C07C 263/10 (2006.01); C08F 2/06 (2006.01); G02B 1/04 (2006.01);
U.S. Cl.
CPC ...
C08G 18/7642 (2013.01); C07C 263/10 (2013.01); C08F 2/06 (2013.01); G02B 1/041 (2013.01);
Abstract
Provided is a method for manufacturing diisocyanate and an optical lens in which, during the manufacture of diisocyanate from diamine via diamine hydrochloride, use is made of an aqueous hydrochloric acid solution and an organic solvent instead of hydrogen chloride gas and solid-phase triphosgen instead of phosgen gas while reaction conditions are controlled, whereby the diisocyanate of high quality can be manufactured at excellent yield, with the causation of less environmental problems.