Title:
PROCESS FOR PRODUCTION OF (POLY)THIOL COMPOUND FOR USE AS OPTICAL MATERIAL, AND POLYMERIZABLE COMPOSITION COMPRISING THE COMPOUND
Document Type and Number:
WIPO Patent Application WO/2007/129450
Kind Code:
A1
Abstract:
Disclosed is a process for production of a (poly)thiol compound for use as an optical material. The process comprises reacting an organic (poly)halogen compound or a (poly)alcohol compound with thiourea to produce an isothiuronium salt and hydrolyzing the isothiuronium salt to thereby produce the (poly)thiol compound, wherein the thiourea has a calcium content of 1.0% by weight or less.
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Inventors:
KUMA SHIGETOSHI (JP)
SAKATA MICHIHARU (JP)
KOBAYASHI SEIICHI (JP)
SAKATA MICHIHARU (JP)
KOBAYASHI SEIICHI (JP)
Application Number:
PCT/JP2007/000399
Publication Date:
November 15, 2007
Filing Date:
April 12, 2007
Export Citation:
Assignee:
MITSUI CHEMICALS INC (JP)
KUMA SHIGETOSHI (JP)
SAKATA MICHIHARU (JP)
KOBAYASHI SEIICHI (JP)
KUMA SHIGETOSHI (JP)
SAKATA MICHIHARU (JP)
KOBAYASHI SEIICHI (JP)
International Classes:
C07C319/14; C07C321/14; C08G18/38; G02B1/04
Foreign References:
| JPH02270859A | 1990-11-05 | |||
| JPH07252207A | 1995-10-03 | |||
| JP2006284920A | 2006-10-19 | |||
| JP2001039944A | 2001-02-13 |
Other References:
See also references of EP 2008998A1
Attorney, Agent or Firm:
HAYAMI, Shinji et al. (2-17-16 Ebisu-Nishi, Shibuya-k, Tokyo 21, JP)
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