Method for manufacturing diisocyanate and optical lens

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12146023
APP PUB NO 20210230352A1
SERIAL NO

15734645

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
WOORI FINE CHEM CO LTD179 BAEKHAKSANDAN-GIL BAEKHAK-MYEON YEONCHEON-GUN GYEONGGI-DO 11049

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Choi, Gyeong Ha Chungcheongbuk-do, KR 1 8
Kim, Dal Seong Gyeonggi-do, KR 1 8
Kwon, Oh Joon Gyeonggi-do, KR 8 77
Lee, Sung Gi Gyeonggi-do, KR 7 31
Shin, Junghwan Seoul, KR 29 81

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