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Resin composition for polarizer protective film, polarizer protective film

A technology of resin composition and protective film, applied in the direction of polarizing elements, etc., can solve the problems of high water absorption, non-proposed polarizer protective film, dimensional deformation, etc., and achieve the effect of excellent appearance

Active Publication Date: 2021-10-08
DENKA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TAC (triacetyl cellulose) film with excellent optical properties is mainly used for polarizer protective film, but as a problem with TAC film, there is a disadvantage that dimensional deformation is easy to occur due to the high water absorption of TAC itself
There are technologies that use acrylic resins as an alternative material for highly water-absorbent TAC films, and technologies that use UV absorbers to protect polarizer films from UV rays, but dimensional stability, UV blocking properties, transparency, and appearance A resin composition for a polarizer protective film and a polarizer protective film both well balanced have not yet been proposed

Method used

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  • Resin composition for polarizer protective film, polarizer protective film
  • Resin composition for polarizer protective film, polarizer protective film
  • Resin composition for polarizer protective film, polarizer protective film

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manufacture example

[0071] Prepare in advance a 20% maleic anhydride solution dissolved in methyl isobutyl ketone so that the concentration of maleic anhydride becomes 20% by mass, and tert-butylperoxy-2-ethylhexanoate becomes 2% by mass A 2% solution of tert-butylperoxy-2-ethylhexanoate obtained in methyl isobutyl ketone was diluted for polymerization. Drop into 20% maleic anhydride solution 2.6kg, styrene 26kg, methyl methacrylate 11.4kg, tert-dodecyl mercaptan 32g, methyl isobutyl ketone 2kg in the 120-liter autoclave with stirrer, will After replacing the gaseous phase with nitrogen, the temperature was raised to 87° C. over 40 minutes while stirring. After heating up, 20% maleic anhydride solution was continuously added at a batch rate of 1.5kg / hour and 2% tert-butyl peroxide was continuously added at a batch rate of 375g / hour for 8 hours while maintaining 87°C. – 2-Ethylhexanoate solution. Thereafter, the batchwise addition of the 2% tert-butylperoxy-2-ethylhexanoate solution was stopped,...

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Abstract

An object of the present invention is to provide a resin composition for a polarizer protective film and a polarizer protective film using the resin composition, which are excellent in dimensional stability, ultraviolet blocking properties, transparency, and appearance. According to the resin composition for a polarizer protective film of the present invention, a thermoplastic resin composition (C) containing 10 to 100% by mass of a styrene-based copolymer (A) and 0 to 90% by mass of a methacrylic resin (B) 100 parts by mass, containing 0.1 to 10 parts by mass of the ultraviolet absorber (D), the light transmittance of the styrene-based copolymer (A) at a wavelength of 200 to 270 nm is 5% or less, and the ultraviolet absorber (D) is based on JIS K0115 The measured absorbance at a wavelength of 380 nm was 0.05 or more.

Description

technical field [0001] The present invention relates to a resin composition for a polarizer protective film and a polarizer protective film using the resin composition. Background technique [0002] In liquid crystal display devices such as smartphones or tablet terminals, TVs, personal computers, and car navigation systems, there are liquid crystal cells formed by sandwiching transparent electrodes, liquid crystal layers, and color filters with glass sheets. Both use polarizers. The polarizer has a structure in which a polarizer protective film is attached to both surfaces of the polarizer film, and the polarizer film, which is easily affected by ultraviolet rays, heat, and moisture in the atmosphere, is protected by the polarizer protective film. A TAC (triacetylcellulose) film with excellent optical characteristics is mainly used as a polarizer protective film. However, as a problem with the TAC film, there is a disadvantage that dimensional deformation is likely to occu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30C08L25/14C08L33/10C08L35/06
CPCC08L25/14C08L33/10C08L35/06G02B5/30C08J5/18C08L33/12
Inventor 下木场裕一西野广平
Owner DENKA CO LTD
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