Title:
METHOD FOR MANUFACTURING DIISOCYANATE AND OPTICAL LENS
Document Type and Number:
WIPO Patent Application WO/2019/235862
Kind Code:
A1
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.
Inventors:
KIM DAL SEONG (KR)
KWON OH JOON (KR)
LEE SUNG GI (KR)
CHOI GYEONG HA (KR)
SHIN JUNGHWAN (KR)
KWON OH JOON (KR)
LEE SUNG GI (KR)
CHOI GYEONG HA (KR)
SHIN JUNGHWAN (KR)
Application Number:
PCT/KR2019/006832
Publication Date:
December 12, 2019
Filing Date:
June 05, 2019
Export Citation:
Assignee:
WOORI FINE CHEM CO LTD (KR)
International Classes:
C08G18/76; C07C209/90; C07C211/27; C07C263/10; C07C265/14; C08G18/38; G02B1/04
Domestic Patent References:
| WO2017174765A1 | 2017-10-12 | |||
| WO2017179575A1 | 2017-10-19 |
Foreign References:
| JP2790513B2 | 1998-08-27 | |||
| US20170210702A1 | 2017-07-27 | |||
| KR101842254B1 | 2018-03-27 |
Attorney, Agent or Firm:
FIRSTLAW P.C. (KR)
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