Ultraviolet-curing resin composition and cured product thereof

A curable resin, ultraviolet technology, applied in the field of ultraviolet curable resin composition and its cured product, optical disc, can solve problems such as insufficient capacity, and achieve the effects of less warpage, excellent low water absorption, and good transmittance

Inactive Publication Date: 2006-10-04
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in order to cope with the large-capacity recording media used in the coming digital communication era, the above-mentioned DVD recording media still has the problem of insufficient capacity.

Method used

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  • Ultraviolet-curing resin composition and cured product thereof
  • Ultraviolet-curing resin composition and cured product thereof
  • Ultraviolet-curing resin composition and cured product thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0077] In the reactor equipped with reflux cooler, stirrer, thermometer, temperature regulator and water separator, put into the condensate 113.44g by hydrogenated bisphenol A and ε-caprolactone (molar ratio is 1: 1), acrylic acid 56.2g, sulfuric acid 2.8g, hydroquinone 0.84g, toluene 157.5g, cyclohexane 67.5g, at a reaction temperature of 95 to 105°C, the reaction was carried out while the water produced was removed by azeotropic distillation with the solvent. When the produced water reached 11 ml, it was regarded as the end point of the reaction. The reaction mixture was dissolved in a mixed solution of 140 g of toluene and 60 g of cyclohexane, neutralized with a 25% aqueous caustic soda solution, and washed three times with 50 g of 15% saline. The solvent was distilled off under reduced pressure to obtain 151 g of a transparent liquid represented by the following structural formula (A-1).

[0078] 【Chemical 4】

[0079]

Synthetic example 2

[0081] Equipped with the reactor of reflux cooler, stirrer, thermometer, temperature regulating device and water separator, put into by hydrogenated bisphenol A and ε-caprolactone (1: 2) condensation product 149.97g, acrylic acid 56.2g, Sulfuric acid 2.8g, hydroquinone 0.84g, toluene 157.5g, hexanaphthene 67.5g, under reaction temperature 95 to 105 ℃, make it react while removing the produced water by azeotropy with solvent, when produced water reaches 11ml was used as the end point of the reaction. The reaction mixture was dissolved in a mixed solution of 140 g of toluene and 60 g of cyclohexane, neutralized with a 25% aqueous caustic soda solution, and washed three times with 50 g of 15% saline. The solvent was distilled off under reduced pressure to obtain 186 g of a transparent liquid of the following structural formula (A-2).

[0082] 【Chemical 5】

[0083]

Synthetic example 3

[0085] In the reactor equipped with reflux cooler, stirrer, thermometer, temperature regulating device and water separator, put condensate 141.01g by hydrogenated bisphenol F and ε-caprolactone (1:2), 56.2g of acrylic acid, Sulfuric acid 2.8g, hydroquinone 0.84g, toluene 157.5g, hexanaphthene 67.5g, under reaction temperature 95 to 105 ℃, react while removing the produced water by azeotropic distillation with solvent, when produced water reaches 11ml, then as the reaction end point. The reaction mixture was dissolved in 140 g of toluene and 60 g of cyclohexane, neutralized with a 25% aqueous caustic soda solution, and then washed three times with 50 g of 15% brine. The solvent was distilled off under reduced pressure to obtain 177 g of a transparent liquid represented by the following structural formula (A-3).

[0086] 【Chemical 6】

[0087]

[0088] (Example)

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Abstract

The present invention enables to provide a highly durable protective coating film or adhesive layer for high-density optical disks with less warp, which is superior in transmission for blue lasers, transparency and low water-absorption, by using an ultraviolet-curing resin composition essentially comprising a compound (A) represented by the following general formula (I) (wherein, R represents each independently a hydrogen atom or a C1-C3 alkyl group, and n and m each represents the number of repetition from 0 to 5) and a photopolymerization initiator.

Description

technical field [0001] The present invention relates to an ultraviolet curable resin composition, its cured product, and an optical disc having the cured product. Background technique [0002] At present, the general optical disk recording media in actual use include CD (Compact disk, CD-ROM), MO (Megneto-optical disk, magneto-optical disk), CD-R (Recordable type, readable and writable disk), CD-RW (CD- rewritable, writable disc) and other types. For these recording media, a recording film and a reflective film are formed on a 1.2 mm thick polycarbonate substrate, and a protective layer of an ultraviolet curing coating agent is provided thereon to protect these films from external factors. In addition, recently, in order to further increase the memory capacity, the problem of birefringence of the polycarbonate substrate and the problem of reducing the laser spot diameter are solved by changing the thickness of polycarbonate to 0.6mm, which is half, and pasting two substrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F20/20C08F20/28C08F290/06G11B7/24G11B7/2534G11B7/254G11B7/2542G11B7/256G11B7/257
CPCG11B7/2534G11B7/2542C08F290/06G11B7/256C08F290/061C08G61/12C08F290/00
Inventor 德田清久石井一彦水谷刚三宅健夫
Owner NIPPON KAYAKU CO LTD
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