Title:
ULTRAVIOLET-CURABLE RESIN COMPOSITION FOR OPTICAL DISK, CURED OBJECT, AND OPTICAL DISK
Document Type and Number:
WIPO Patent Application WO/2012/011260
Kind Code:
A1
Abstract:
The invention relates to an ultraviolet-curable resin composition for optical disks having an organic pigment layer, the resin composition comprising (A) a polyfunctional (meth)acrylate, (B) a urethane (meth)acrylate, and (C) a photopolymerization initiator and being characterized by giving a cured film that has a storage modulus (E') at 80ºC in the range of 50-200 MPa. The resin composition is suitable for use in forming a light-transmitting layer for optical disks having an organic-pigment recording layer. This resin composition is applied to the organic-pigment recording layer or interface layer of an optical disk substrate having an organic-pigment recording layer and is cured to form a light-transmitting layer which adjoins that layer. The optical disk substrate is inhibited from warping when the resin composition is applied and cured. Thus, it is possible to obtain an optical disk which has an initial jitter value as low as 7% or below, has a jitter value less than 10% even after having undergone a high-temperature high-humidity endurance test, and has excellent recording signal characteristics both in the initial stage and after the endurance test. The hardcoat that has been formed on the light-transmitting layer develops no defects, such as cracks, even after the endurance test. This optical disk has excellent durability.
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Inventors:
MOTOHASHI, Hayato (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
本橋 隼 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
NAITOU, Masahiro (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
内藤 正弘 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
KOBAYASHI, Daisuke (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
本橋 隼 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
NAITOU, Masahiro (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
内藤 正弘 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
KOBAYASHI, Daisuke (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
Application Number:
JP2011/004044
Publication Date:
January 26, 2012
Filing Date:
July 15, 2011
Export Citation:
Assignee:
NIPPONKAYAKU KABUSHIKIKAISHA (11-2, Fujimi 1-chome Chiyoda-k, Tokyo 72, 〒1028172, JP)
日本化薬株式会社 (〒72 東京都千代田区富士見一丁目１１番２号 Tokyo, 〒1028172, JP)
MOTOHASHI, Hayato (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
本橋 隼 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
NAITOU, Masahiro (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
内藤 正弘 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
日本化薬株式会社 (〒72 東京都千代田区富士見一丁目１１番２号 Tokyo, 〒1028172, JP)
MOTOHASHI, Hayato (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
本橋 隼 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
NAITOU, Masahiro (31-12 Shimo 3-chome, Kita-k, Tokyo 88, 〒1158588, JP)
内藤 正弘 (〒88 東京都北区志茂３－３１－１２日本化薬株式会社 機能化学品研究所内 Tokyo, 〒1158588, JP)
International Classes:
G11B7/24; C08F290/06; G11B7/244; G11B7/254; G11B7/257; G11B7/26
Attorney, Agent or Firm:
SAEKI, Norio (4th Floor, Aminosan Kaikan Building 15-8, Nihonbashi 3-chome, Chuo-k, Tokyo 27, 〒1030027, JP)
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Claims: