Rubber-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive layer, pressure-sensitive adhesive film, optical film with rubber-based pressure-sensitive adhesive layer, optical member, and image display device

An adhesive layer and adhesive technology, applied in the fields of optical components, rubber-based adhesive layers, and image display devices, can solve problems such as deterioration and deterioration of polarizers, and achieve excellent durability, excellent low moisture permeability, Excellent optical reliability

Active Publication Date: 2019-04-26
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a single-sided protective polarizing film can be thinned and reduced in weight, but since one side of the polarizer is not protected by the protective film, there is a problem that it is easily deteriorated by moisture, etc.
In addition, even if it is a double-sided protective polarizing film, when the protective film is thinned, the polarizer may also deteriorate due to moisture or the like.

Method used

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  • Rubber-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive layer, pressure-sensitive adhesive film, optical film with rubber-based pressure-sensitive adhesive layer, optical member, and image display device
  • Rubber-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive layer, pressure-sensitive adhesive film, optical film with rubber-based pressure-sensitive adhesive layer, optical member, and image display device
  • Rubber-based pressure-sensitive adhesive composition, rubber-based pressure-sensitive adhesive layer, pressure-sensitive adhesive film, optical film with rubber-based pressure-sensitive adhesive layer, optical member, and image display device

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0146] Production example 1 (manufacture of polarizing film (1))

[0147] In order to produce a thin polarizing film, first, a 9 μm-thick polyvinyl alcohol (PVA) layer was formed on an amorphous polyethylene terephthalate (PET) substrate to obtain a laminate. Stretching was assisted in air at a stretching temperature of 130° C. to produce a stretched laminate. Next, a colored laminate was produced by dyeing the stretched laminate, and an optical film laminate comprising a 4 μm thick PVA layer was further produced by passing the colored laminate through a stretching temperature The boric acid water stretching at 65° C. was stretched integrally with the amorphous PET substrate so that the total stretching ratio was 5.94 times. Through such two-stage stretching, the PVA molecules that constitute the PVA layer formed on the amorphous PET substrate undergo high-order orientation, and the iodine adsorbed by dyeing undergoes unidirectional high-order in the form of polyiodide ion co...

manufacture example 2

[0149] Production example 2 (manufacture of polarizing film (2))

[0150] A polyvinyl alcohol film with a thickness of 30 μm was placed between rollers having different speed ratios, and stretched 3 times while being dyed in a 0.3% iodine solution at 30° C. for 1 minute. Then, it was stretched to 6 times while being immersed in an aqueous solution containing 4% boric acid and 10% potassium iodide at 60° C. for 0.5 minutes. Next, after cleaning by immersing in an aqueous solution containing 1.5% potassium iodide at 30°C for 10 seconds, drying was performed at 50°C for 4 minutes to obtain a polarizer with a thickness of 12 μm. A triacetyl cellulose film with a thickness of 25 μm, which was hard-coated on one side and saponified on the reverse side, was bonded to one side of the polarizer with a polyvinyl alcohol-based adhesive, and bonded to the reverse side of the polarizer with a polyvinyl alcohol-based adhesive. A cycloolefin-based resin film with a thickness of 13 μm was us...

manufacture example 3

[0151] Production example 3 (production of the first retardation film)

[0152] Polyethylene glycol (PEG) with 37.5 parts by mass of isosorbide (ISB), 91.5 parts by mass of 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene (BHEPF), and an average molecular weight of 400 8.4 parts by mass, 105.7 parts by mass of diphenyl carbonate (DPC), and 0.594 parts by mass of cesium carbonate (0.2 mass % aqueous solution) as a catalyst are respectively dropped into a reaction vessel, and under a nitrogen atmosphere, as the first stage of the reaction, the The temperature of the heat medium in the reaction vessel was set to 150° C., and the raw materials were dissolved while stirring as necessary (about 15 minutes).

[0153]Next, the pressure in the reaction container was adjusted from normal pressure to 13.3 kPa, and the temperature of the heat medium in the reaction container was raised to 190° C. over 1 hour, and the generated phenol was extracted out of the reaction container. After keeping t...

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Abstract

The present invention provides a rubber-based pressure-sensitive adhesive composition which contains a rubber-based base polymer, the rubber-based base polymer comprising an isobutylene-based polymerhaving a polydispersity coefficient, (weight-average molecular weight) / (number-average molecular weight), of 4 or less. A 50 mum-thick rubber-based pressure-sensitive adhesive layer formed from the rubber-based pressure-sensitive adhesive composition has a moisture permeability at 40 DEG C and 92% RH of 50 g / (m2*day) or less. The rubber-based pressure-sensitive adhesive composition of the presentinvention can form a rubber-based pressure-sensitive adhesive layer which has low moisture permeability and has so high durability that the adhesive layer can be inhibited from suffering troubles including lifting and peeling even in high-temperature environments.

Description

technical field [0001] The present invention relates to a rubber-based adhesive composition and a rubber-based adhesive layer formed from the rubber-based adhesive composition. In addition, the present invention relates to an optical film with a rubber adhesive layer obtained by providing the rubber adhesive layer on an optical film, and an optical film obtained by providing the rubber adhesive layer on a low moisture permeability film. obtained optical components. In addition, the present invention relates to an adhesive film comprising the rubber-based adhesive layer. Furthermore, the present invention relates to an image display device including the optical film with an adhesive layer and / or an optical member. Background technique [0002] In recent years, in image display devices such as liquid crystal display devices, reduction in weight and thickness has been strongly demanded, and reduction in thickness and weight has also been demanded for various optical members s...

Claims

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Application Information

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IPC IPC(8): C09J123/22B32B7/02B32B27/00C09J7/30C09J11/06G02F1/1335G02B5/30
CPCB32B27/00C09J11/06C09J123/22G02F1/1335G02B5/30G02B1/14C09J7/22G02B5/3025C09J2203/318C09J2301/312
Inventor 泽崎良平松本真理
Owner NITTO DENKO CORP
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