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Title:
METHOD FOR PRODUCING OPTICAL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/140959
Kind Code:
A1
Abstract:
The present invention provides a method for producing an optical material comprising a predetermined (a) compound, (b) compound, (c) compound, (d) compound, and (e) compound, wherein the compounding method minimizes the occurrence of a defect where peeling traces on a lens linger. Going through a first step to fifth step minimizes the defect where peeling traces linger. First step: a step for dissolving the (b) compound into the (a) compound to obtain a first solution. Second step: a step for adding the (e) compound to the first solution obtained in the first step and then mixing to obtain a second solution not comprising the (d) compound. Third step: a step for adding the (c) compound to the second solution obtained in the second step to obtain a reaction mixture. Fourth step: a step for adding the (d) compound to the reaction mixture obtained in the third step and then mixing to obtain a resin composition for an optical material. Fifth step: a step for cast-molding the resin composition for an optical material obtained in the fourth step and then polymerizing to obtain the optical material.

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Inventors:
TAKEMURA KOUHEI (JP)
OKADA HIROYUKI (JP)
HORIKOSHI HIROSHI (JP)
Application Number:
PCT/JP2013/054935
Publication Date:
September 26, 2013
Filing Date:
February 26, 2013
Export Citation:
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Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G75/08; C08G18/38; G02B1/04
Domestic Patent References:
WO2011007749A12011-01-20
Foreign References:
JP2004043526A2004-02-12
JP2008101190A2008-05-01
JP2012167199A2012-09-06
JP2002120233A2002-04-23
JP2002122701A2002-04-26
JP2004339329A2004-12-02
Other References:
See also references of EP 2829564A4
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
Kobayashi 浩 (JP)
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