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Process for preparing a k-type polarizer

A technology of polarizers and products, applied in chemical instruments and methods, polarizing elements, instruments, etc., can solve the problems of polarizers with stripes or spots, unsuitable for precision optical applications, uneven catalytic dehydration, etc., to reduce potential dangers. Effect

Inactive Publication Date: 2005-05-18
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] While K-type polarizers can be prepared by conventional acid methods, these methods necessarily involve handling and potential exposure to harmful amounts of acid, usually hydrochloric acid
In addition, the gas-phase acid method can lead to non-uniform catalytic dehydration, which can lead to streaks or spots in the polarizer, making it unsuitable for many precision optical applications

Method used

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  • Process for preparing a k-type polarizer
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  • Process for preparing a k-type polarizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0089] A series of poly(isooctyl acrylate-co-acrylic acid) polymers were prepared by varying the ratio of isooctyl acrylate (IOA) to acrylic acid (AA). Prepare 80-100 parts by weight of IOA (available from Aldrich, Milwaukee, WI), 0-20 parts by weight of AA (available from Aldrich, Milwaukee, WI), 0.4 parts by weight of 2,2'-azobis(2-methyl Nitrile) (available as VAZO 67 from DuPont, Wilmington, DE) and 150 parts by weight of ethyl acetate (available from EM Science, Gibbstown, NJ) and heated at 65°C for 24 hours. To each of the obtained polymer solutions was added 0.2 parts by weight of 2,4-bis(trichloromethyl)-6-(3,4-dimethoxyphenyl)-s-triazine as a photoacid generator. Combination of aryl nitriles with tris Chloroacetonitrile and Lewis acids such as AlCl 3 , AlBr 3 etc. co-trimerization to prepare s-triazine.

[0090]The polymer solution containing the obtained 2,4-bis(trichloromethyl)-6-(3,4-dimethoxyphenyl)-s-triazine was applied to a wet thickness of 0.254 mm using a...

Embodiment 9

[0094] In addition to using 96 parts by weight of IOA, 4 parts by weight of AA and 0.5 parts by weight of 2,4-bis(trichloromethyl)-6-(3,4-dimethoxyphenyl)-s-triazine, according to the implementation Example 3 Preparation of a sandwich structure with a PET diffusion barrier. The resulting structures were exposed to UV light and heat as in Examples 1-8, except that the exposure time was varied. PET was removed from each exposed structure and poly(isooctyl acrylate-co-acrylic acid) was washed from the partially dehydrated PVA film with ethyl acetate. As in Examples 1-8, the resulting, exposed, partially dehydrated PVA film was analyzed for absorption spectroscopy, and determined R D . The results are shown in Table 2. A representative spectrum using sample 9L is shown in Figure 2.

[0095] sample

During UV exposure

time (minutes)

When exposed at 105°C

time (minutes)

R D

at λmax

A(=)

A(⊥)

λmax

(nano)

9A...

Embodiment 10

[0101] The resin syrup was prepared by mixing 80 parts by weight of IOA, 20 parts by weight of isobornyl acrylate (available from Aldrich, Milwaukee, WI) and 0.2 parts by weight of benzil dimethyl ketal (available as Esacure™ KB-1 from Sartomer Co., West Chester, PA), the resulting solution was sparged with nitrogen for about 15 minutes, the mixture was exposed to UV light (two F40 / 350BL fluorescent tubes) until the viscosity reached 2000-3000 cps, and then quenched with oxygen. The obtained syrup (100 parts by weight) was mixed with 0.2 parts by weight of 2,4-bis(trichloromethyl)-6-(3,4-dimethoxyphenyl)-s-triazine. The resulting solution was coated onto a PVA film at a nominal thickness of 0.127 mm to form a sandwich and exposed to UV light for 3 minutes followed by heat for 45 minutes as in Example 9. The maroon character of the polyacetylene chromophore was formed, indicating the formation of a polarizer film.

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Abstract

Described herein is a method of preparing a polarizer wherein an article comprising an oriented vinyl alcohol polymer film layer and a photoacid generator-containing The acid donor layer is exposed to radiant energy.

Description

field of invention [0001] The invention relates to a method for preparing a K-type polarizer, characterized in that a uniaxially oriented polyvinyl alcohol film has blocks of light polarizing (dichroic) conjugated polyacetylene. technical background [0002] Dichroic polarizers are absorptive linear polarizers that have vector anisotropy in the absorption of incident light. Thus, the polarizer has the property of differential absorption (and transmission) of the components of the incident beam, depending on the direction of vibration of the components. In general, polarizers transmit radiant energy along one electromagnetic vector and absorb energy along a perpendicular electromagnetic vector. When an incident beam enters a dichroic polarizer, the incident beam encounters two different absorption coefficients, one low and one high, so that the outgoing light essentially vibrates in the direction of low absorption (high transmission). [0003] The development of synthetic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/00B32B27/08C08F8/00C08F16/06G02B5/30
CPCB32B7/00B32B27/08G02B5/3033C08F2800/20Y10S428/91C08F8/30Y10T428/31938Y10T428/31935Y10T428/31924Y10T428/31855Y10T428/31909Y10T428/31928C08F220/1808G02B5/30
Inventor 杜安·D·范斯勒托德·D·琼斯巴比·N·加达姆罗伯特·T·菲茨西蒙斯史蒂文·M·海尔曼约翰·J·卡尔
Owner SEIKO EPSON CORP
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