Near-infrared-absorbing film and optical filter employing the same for plasma display panel

A near-infrared and absorbing film technology, which is applied in the field of optical films, can solve the problem of difficult formation of adhesive layer processing and adhesive layer, and achieve the effects of easy manufacture, excellent heat resistance or stability

Inactive Publication Date: 2010-03-31
NIPPON KAYAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Patent Document 2 proposes to use a silicon-based adhesive as an adhesive, but the silicon-based adhesive faces the difficulty that the handling of the adhesive layer, especially the formation of the adhesive layer is difficult

Method used

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  • Near-infrared-absorbing film and optical filter employing the same for plasma display panel
  • Near-infrared-absorbing film and optical filter employing the same for plasma display panel
  • Near-infrared-absorbing film and optical filter employing the same for plasma display panel

Examples

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Embodiment

[0073] The present invention will be described in more detail below by way of examples, but the present invention is not intended to be limited to these examples. In the examples, unless otherwise specified, the term "part" means part by weight, and the term "%" means percentage by weight.

reference example 1

[0074] Reference example 1 (synthesis of copolymer 1)

[0075] Add 64 parts of butyl acrylate, 32 parts of cyclohexyl acrylate and 4 parts of acrylic acid and 100 parts of ethyl acetate as monomers and 100 parts of ethyl acetate as the working solvent into a 1 L volume equipped with stirrer, condenser tube, temperature sensor and nitrogen inlet tube flask, and stir the mixture to dissolve. Nitrogen gas was introduced to adjust the oxygen concentration in the gas phase to 0.1% by volume or less, and then the solution was heated to 70°C. 0.020 parts of azobisisobutyronitrile as a polymerization initiator dissolved in a small amount of ethyl acetate was added to the flask, and the obtained mixture was polymerized under heating for 7 hours while the temperature was kept at 70°C. Thus, a copolymer 1 of butyl acrylate, cyclohexyl acrylate and acrylic acid was obtained. Methyl ethyl ketone was added to the copolymer, and the copolymer was dissolved to a copolymer concentration of 2...

reference example 2

[0076] Reference example 2 (synthesis of copolymer 2)

[0077] Copolymer 2 of butyl acrylate, isobornyl acrylate and acrylic acid was obtained in a similar manner to that used in Reference Example 1, except that 72 parts of butyl acrylate, 24 parts of isobornyl acrylate and 4 parts of acrylic acid were used as a monomer. Methyl ethyl ketone was added to the copolymer, and the copolymer was dissolved to a copolymer concentration of 25%, whereby a resin solution was obtained. The weight average molecular weight measured by GPC was 1,100,000.

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Abstract

A near-infrared-absorbing film which is excellent in heat resistance and moist-heat resistance and retains optical properties including satisfactory near-infrared-absorbing ability. The near-infrared-absorbing film comprises a transparent base and a pressure-sensitive adhesive layer formed on one side of the base from a pressure-sensitive adhesive comprising a near-infrared-absorbing dye and a copolymer of a constituent monomer which is a C5-10 cycloalkyl ester of (meth)acrylic acid. This near-infrared-absorbing film may be laminated to other functional film(s) to give a laminate useful as anoptical filter for PDPs.

Description

technical field [0001] The present invention relates to an optical film provided with an adhesive layer on a transparent substrate, the adhesive layer having near-infrared absorption capability, and applications thereof. More specifically, the present invention relates to a near-infrared absorbing film provided with an adhesive layer containing near Formed as a binder of infrared absorbing dyes and specific copolymers. Background technique [0002] The principle of the plasma display panel (hereinafter referred to as PDP) is as follows: a voltage is applied to a rare gas (neon or xenon) enclosed in a gas chamber inserted between two glass substrates to make the rare gas into a plasma state, by The ultraviolet radiation emitted by this noble gas excites the fluorescent substance coated on the wall surface of the gas chamber, thereby generating visible light required for image information. However, while PDP emits visible light, it also emits electromagnetic waves harmful to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/22B32B7/02B32B27/18B32B27/30C09B53/00G09F9/00
CPCG02B5/208B32B27/30C09B53/02G02B1/04G02B5/223B32B7/12B32B15/02B32B15/08B32B27/06B32B27/08B32B27/16B32B27/18B32B27/304B32B27/308B32B27/36B32B27/365B32B27/40B32B2255/10B32B2255/26B32B2307/306B32B2307/308B32B2307/40B32B2307/412B32B2307/584B32B2307/714B32B2457/204B32B2307/212Y10T428/31935C08L33/08C08L33/10G02B5/22C09B53/00G09F9/00
Inventor 上原淳行濑川淳一芥研二藤本昌树
Owner NIPPON KAYAKU CO LTD
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