Title:
METHOD FOR PRODUCING COMPOSITION FOR OPTICAL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2013/115212
Kind Code:
A1
Abstract:
Through the present invention, a composition for an optical material can be produced which makes it possible to obtain a uniform optical material, by pre-polymerizing (a) an inorganic compound having a sulfur atom and (b) an episulfide compound using a hindered amine as a catalyst, and subsequently adding and mixing (c) a polythiol compound and (d) a polyisocyanate compound. By also polymerization-hardening this composition for an optical material, an optical material can be provided having a high refractive index (ne of 1.73 or higher), high strength (elongation of 13% or more in three-point bend testing, and good drilling resistance), and high heat resistance (softening point of 70°C or higher measured by TMA).
Inventors:
AOKI TAKASHI (JP)
ISHIZUKA HIROHITO (JP)
KOSHIISHI EIJI (JP)
TAKEUCHI MOTOHARU (JP)
ISHIZUKA HIROHITO (JP)
KOSHIISHI EIJI (JP)
TAKEUCHI MOTOHARU (JP)
Application Number:
PCT/JP2013/051970
Publication Date:
August 08, 2013
Filing Date:
January 30, 2013
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
C08G75/08; G02B1/04; G02C7/02
Domestic Patent References:
| WO2010131631A1 | 2010-11-18 | |||
| WO2010073613A1 | 2010-07-01 |
Foreign References:
| JP2009242532A | 2009-10-22 | |||
| JP2004137481A | 2004-05-13 | |||
| JP2007093862A | 2007-04-12 | |||
| JP2009144094A | 2009-07-02 | |||
| JP2012233044A | 2012-11-29 | |||
| JPH09110979A | 1997-04-28 | |||
| JP2001002783A | 2001-01-09 | |||
| JP2004137481A | 2004-05-13 | |||
| JP2002122701A | 2002-04-26 | |||
| JP2004339329A | 2004-12-02 | |||
| JP2008101190A | 2008-05-01 |
Other References:
See also references of EP 2810972A4
Attorney, Agent or Firm:
KOBAYASHI Hiroshi et al. (JP)
Kobayashi 浩 (JP)
Kobayashi 浩 (JP)
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Claims: