Title:
METHOD FOR PRODUCING METHACRYLIC RESIN FOR OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2013/077180
Kind Code:
A1
Abstract:
The present invention is capable of producing a methacrylic resin that is suitable for an optical film, and has excellent transparency and color during production of the film, with less defects such as fish eyes by adding a polymeric dispersant (A) represented by general formula (1) and an inorganic salt and/or organic salt (B) composed of an alkali metal salt, alkaline earth metal salt or ammonium salt when subjecting methyl methacrylate alone or a monomer mixture of which methyl methacrylate is one component to suspension polymerization.
(In the formula, n=10-60 mol%, m=40-90 mol%, R1 is hydrogen or a methyl group, R2 is an alkyl group having 1-8 carbon atoms, and M is an alkali metal or an alkaline earth metal, or NH4.)
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Inventors:
KAWAHAMA SAYAKO (JP)
MATSUO AKIRA (JP)
MATSUMURA YASUO (JP)
KOMATA AYUMU (JP)
MATSUO AKIRA (JP)
MATSUMURA YASUO (JP)
KOMATA AYUMU (JP)
Application Number:
PCT/JP2012/078715
Publication Date:
May 30, 2013
Filing Date:
November 06, 2012
Export Citation:
Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
UNIV KEIO (JP)
UNIV KEIO (JP)
International Classes:
C08F2/20; C08F4/36; C08F20/10
Foreign References:
JP2010514884A | 2010-05-06 | |||
JP2000086804A | 2000-03-28 | |||
JP2000159822A | 2000-06-13 | |||
JP2000159821A | 2000-06-13 | |||
JPH05155907A | 1993-06-22 | |||
JPH07145214A | 1995-06-06 |
Other References:
See also references of EP 2784095A4
Attorney, Agent or Firm:
MORITA, NOBUYUKI (JP)
Yoriyuki Morita (JP)
Yoriyuki Morita (JP)
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Claims:
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