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Patent Searching and Data


Title:
ULTRAVIOLET CURABLE RESIN COMPOSITION AND BLU-RAY DISC
Document Type and Number:
WIPO Patent Application WO/2013/175754
Kind Code:
A1
Abstract:
The present invention relates to an ultraviolet curable resin composition for Blu-ray Discs and a Blu-ray Disc having a layer of a cured product formed from said composition. The resin composition contains an epoxy (meta) acrylate "A" obtained by reacting a glycidyl ether epoxy compound with a (meta) acrylate compound having a carboxy group, such as a (meta) acrylic acid, a monofunctional (meta) acrylate compound "B", and a photoinitiator "C". The content of "A" is greater than or equal to 30 parts by weight based on 100 parts by weight of the total resin composition, and when the content for "A" is regarded as "A" and the content for "B" is regarded as "B", A/B ranges from 0.8 to 1.45. A cured product produced from the resin composition has both a high glass transition temperature and a high modulus of elasticity at 50 degrees Celsius, and the restoring property after pressing is good. A Blu-ray Disc having a layer of the cured product has small variation in both warping from curing and warping after an endurance test.

Inventors:
KIDOBA JUN (JP)
MATSUO YUICHIRO (JP)
KOBAYASHI DAISUKE (JP)
NAITOU MASAHIRO (JP)
MOTOHASHI HAYATO (JP)
Application Number:
JP2013/003183
Publication Date:
November 28, 2013
Filing Date:
May 20, 2013
Export Citation:
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Assignee:
NIPPON KAYAKU KK (JP)
International Classes:
G11B7/254; C08F290/06; C08F299/06; G11B7/24; G11B7/24035; G11B7/257
Domestic Patent References:
WO2011093063A12011-08-04
WO2010143568A12010-12-16
WO2012157200A12012-11-22
WO2009144926A12009-12-03
Foreign References:
JP2007179613A2007-07-12
JP2005293823A2005-10-20
JPH10310621A1998-11-24
JPH11100419A1999-04-13
JP2000345073A2000-12-12
JP2010015688A2010-01-21
JP2010044852A2010-02-25
Attorney, Agent or Firm:
SAEKI, NORIO (JP)
Norio Saeki (JP)
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