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K-type polarizer and preparation thereof

A polarizer, pre-polarization technology, applied in optics, polarizing elements, optical elements, etc., can solve problems such as unsuitable use, polarizers with stripes or spots, etc., and achieve the effect of reducing potential harm

Inactive Publication Date: 2005-07-27
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the vapor-phase acid method can lead to non-uniform catalytic dehydration, which can lead to streaked or speckled polarizers, making it unsuitable for use in many precision optical applications

Method used

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  • K-type polarizer and preparation thereof
  • K-type polarizer and preparation thereof
  • K-type polarizer and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] Poly(isooctyl acrylate-co-isobornyl acrylate) polymers were prepared by solution polymerization as described below. Isooctyl acrylate (IOA, 90 parts by weight), isobornyl acrylate (IBA, 10 parts by weight), benzyl dimethyl ketal (0.2 parts by weight, available from Sartomer, West Chester PA as Esacure KB-1 ) and ethyl acetate (100 parts by weight, available from EM Science, Gibbstown, NJ) were added to the reaction vessel and injected with N 2 15 minutes and irradiated with UV light (two Sylvania F40 / 350 BL fluorescent tubes, Danvers, MA) for 18 hours with stirring. The samples were diluted with 50 parts by weight of ethyl acetate and used to prepare the following examples. A series of examples were carried out by mixing 10 parts by weight of the above polymer, 0-0.4 parts by weight of cyanuric chloride, and 0-1 part by weight of 1-decanol.

[0135] Each solution was coated onto pre-oriented polyvinyl alcohol (PVA) film at a wet thickness of 0.508 mm using an eight-p...

Embodiment 2

[0142] Poly(IOA-co-IBA) polymer was prepared as described in Example 1. A series of examples were performed by mixing 10 parts by weight of this polymer overnight with 0-0.4 parts by weight of cyanuric chloride and 0-1.05 parts by weight of 1-decanol. Sandwich structures were obtained as described in Example 1 using these solutions. Conversion was then achieved by placing them in an oven at 165°C for 15 minutes. All of the examples except Example 2A exhibited the maroon red color characteristic of partially dehydrated PVA after heating. The results are listed in Table 2.

[0143] Example

Cyanuric chloride

parts by weight

1-Decanol

parts by weight

color

2A *

2B

2C

2D

2E

2F

2G

2H

0

0.02

0.041

0.12

0.2

0.2

0.28

0.401

0

0.057

0.109

0.312

0.521

0

0.73

1.049

none

uneven bright reddish brown...

Embodiment 3

[0147] Copolymers of isooctyl acrylate (IOA) and acrylamide were prepared by solution polymerization. Prepare the 2-propanol (EM Science, Gibbstown, NJ) and 150 parts by weight of ethyl acetate (EM Science, Gibbstown, NJ). Nitrogen was bubbled through the mixture for 15 minutes, then heated at 65° C. for 24 hours with stirring. A sample was obtained by mixing 10 parts by weight of the resulting polymer solution overnight with 0.2 parts by weight of cyanuric chloride and 0.52 parts by weight of 1-decanol. The mixture turned white overnight. The sandwich structure was obtained and transformed as described in Example 1. Upon heating, this example converted to the maroon red character of partially dehydrated PVA.

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Abstract

The present invention discloses a method of making a polarizer by irradiating a prepolarizer comprising oriented vinyl at a temperature sufficient to partially dehydrate a vinyl alcohol polymer to form a vinyl alcohol / poly(acetylene) copolymer An alcohol polymer film layer and an acid donor layer containing a thermal acid generator.

Description

field of invention [0001] The present invention relates to a method of preparing a K-type polarizer featuring a uniaxially oriented film of poly(vinyl alcohol) containing photopolarizing (dichroic) blocks of conjugated poly(acetylene). Background technique [0002] Dichroic polarizers are absorptive linear polarizers that exhibit vectorial anisotropy in the absorption of incident light. The polarizer thus has the property of causing the element to differentially absorb (and transmit) an incident beam of light, depending on the direction of vibration of the element. Generally, polarizers transmit radiant energy along one electromagnetic vector direction and absorb energy along a perpendicular electromagnetic vector direction. Once an incident light beam enters a dichroic polarizer, it encounters two different absorption coefficients (one low and one high), so that the emitted light essentially vibrates in the direction of low absorption (high transmission). [0003] The dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/00C08J7/00G02B1/04G02B5/30
CPCG02B1/04C08F8/00G02B5/3033C08F2800/20C08F8/30C08L29/04C08F16/06C08F220/1808G02B5/30
Inventor 托德·D·约翰杜安·D·范斯勒小罗伯特·T·菲茨西蒙斯韦恩·S·马奥尼凯文·M·莱万多夫斯基米歇尔·S·文德兰巴布·N·加德丹
Owner SEIKO EPSON CORP
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