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Polarizing elements and polarizers

A technology of polarizing element and polarizing plate, applied in the direction of optical element, polarizing element, optics, etc., to achieve the effect of high polarization performance

Inactive Publication Date: 2016-10-19
NIPPON KAYAKU CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of a color liquid crystal projector, a polarizing plate is used in the liquid crystal imaging part, but since the polarizing plate absorbs a large amount of light and projects it, an image of tens of inches to a hundred and tens of inches is formed in a small area of ​​0.5 to 6 inches Focusing on the polarizer, so due to the size of this optical density, it is impossible to avoid the deterioration caused by light and the thermal influence when irradiating light

Method used

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  • Polarizing elements and polarizers
  • Polarizing elements and polarizers
  • Polarizing elements and polarizers

Examples

Experimental program
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Effect test

Embodiment 1

[0086]

[0087]13.7 parts of 4-aminobenzoic acid were added to 500 parts of water, and dissolved with sodium hydroxide. After cooling, 32 parts of 35% hydrochloric acid was added below 10°C, followed by 6.9 parts of sodium nitrite, and stirred at 5°C to 10°C for 1 hour. 20.9 parts of sodium aniline-ω-methanesulfonate was added thereto, and sodium carbonate was added with stirring at 20°C to 30°C to adjust the pH to 3.5. Stirring is further performed to complete the coupling reaction, and filtration is performed to obtain a monoazo compound. The obtained monoazo compound was stirred at 90 degreeC in the presence of sodium hydroxide, and 17 parts of the monoazo compounds of said formula (3) were obtained. Dissolve 12 parts of the monoazo compound of the above formula (3), 21 parts of 4,4'-dinitrostilbene-2,2'-sulfonic acid in 300 parts of water, and then add 12 parts of sodium hydroxide, The condensation reaction was carried out at 90°C. Subsequently, reduction was performe...

Embodiment 2

[0091] In the manufacture of the polarizing element of Example 1, the temperature for the dyeing treatment was set to 35° C.; in the proportion of n of the obtained polarizing element, n=1 was 34%, n=2 was 62%, n=2 3 is 4%; except that, a polarizing plate was produced in the same manner, and a measurement sample was produced.

Embodiment 3

[0093] In the preparation of the pigment A of Example 1, after dissolving 21 parts of 4,4'-dinitrostilbene-2,2'-sulfonic acid in 300 parts of water, 12 parts of sodium hydroxide were added, and at 90 Condensation reaction carried out at ℃, in which 12 parts of the monoazo compound of formula (3) is changed to 7 parts to make a dye, and the ratio of n=1 is 15%, n=2 is 84%, n=3 is the dye A of 1% composition, except that, make polarizing element similarly; Except making n=1 in the ratio of n of the obtained polarizing element be 17%, n=2 is 92%, n= Except that 3 was 1%, polarizing plates were produced in the same manner, and measurement samples were produced.

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Abstract

An object of the present invention is to provide a polarizing element and a polarizing plate having high polarization performance with respect to a light source having the highest luminous intensity at 450 nm to 480 nm. The polarizing element of the present invention is a polarizing element obtained by stretching a film of a polyvinyl alcohol resin or a derivative thereof containing a dichroic dye, and the polarizing element is characterized in that at least one of the dichroic dyes is The compound represented by formula (1) or a salt thereof has an adsorption ratio of n=2 to the total adsorption amount of n=1 to n=4 in the dichroic dye of 55% or more.

Description

technical field [0001] The present invention relates to a polarizing element and a polarizer using the polarizing element. Background technique [0002] A polarizing element is generally produced by adsorbing iodine or a dichroic dye as a dichroic dye on a polyvinyl alcohol-based resin film and aligning it. A protective film made of triacetyl cellulose or the like is bonded to at least one side of the polarizing element via an adhesive layer to form a polarizing plate, which is used in a liquid crystal display device or the like. A polarizing plate using iodine as a dichroic dye is called an iodine-based polarizing plate, and a polarizing plate using a dichroic dye as a dichroic dye is called a dye-based polarizing plate. Among them, for the dye-based polarizer, if the polarizers with the same degree of polarization are compared, the transmittance of the dye-based polarizer is lower than that of the iodine-based polarizer, that is, the dye-based polarizer has a low contrast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30C09B33/18G02F1/1335G03B21/14
CPCC09B33/26C09B56/16G02B5/3033C09B33/18G02B5/30G02F1/1335G03B21/14
Inventor 望月典明
Owner NIPPON KAYAKU CO LTD
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