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High-water-resistance and weather-resistance polarizer adhesive, polarizer and preparation method

A technology of water resistance and weather resistance, applied in the field of polarizers, can solve the problems of difficult control of borax gel, undisclosed water resistance, and limited application range, etc., and achieve the effects of reducing hydrophilicity, high weather resistance, and reducing the number of hydroxyl groups

Active Publication Date: 2019-05-14
恒美光电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN100381839C discloses a polarizing plate, which is a polarizing plate formed by laminating a protective film formed of a cycloolefin-based resin on one or both surfaces of a polyvinyl alcohol-based polarizing film with an adhesive, the adhesive layer Contains urethane-based adhesive and polyvinyl alcohol-based resin, which can effectively improve the adhesion between polyvinyl alcohol-based polarizing film and cycloolefin-based protective film, but it is not disclosed whether it improves water resistance
At present, chemical cross-linking methods are often used in the industry to improve the water resistance of PVA films. Therefore, the choice of cross-linking agent is very important. Polyvinyl acetalization, diisocyanate cross-linking, and borax modification methods are used to improve its water resistance. , due to the irritating odor and toxicity of formaldehyde, acetaldehyde, glyoxal, and diisocyanate, borax gel is difficult to control and other disadvantages, so that its application range is greatly limited. Therefore, it is necessary to improve the water resistance and weather resistance of polarizing plates. There is still much room for improvement

Method used

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  • High-water-resistance and weather-resistance polarizer adhesive, polarizer and preparation method
  • High-water-resistance and weather-resistance polarizer adhesive, polarizer and preparation method
  • High-water-resistance and weather-resistance polarizer adhesive, polarizer and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of high water resistance and high weather resistance adhesive: (1) Preparation of polyvinyl alcohol aqueous solution: Weigh 96 parts of pure water, add 4 parts of polyvinyl alcohol resin under stirring at 80 rpm, and pre-dissolve for 60 minutes to make polyvinyl alcohol resin Fully swell, heat up to 95°C, keep warm for 120min, cool down to room temperature, and obtain an aqueous solution of polyvinyl alcohol; (2) weigh 99.2 parts of pure water, add 0.8 parts of hydroxypropyl methylcellulose resin under stirring at 80 rpm, and make It is fully dissolved to obtain an aqueous solution of a crosslinking agent; (3) Weigh 1 part of stearic acid and 0.05 part of γ-aminopropyl triethoxysilane, and add them to 10 parts of absolute ethanol under stirring at 80 rpm to obtain a hydrophobic Surfactant alcohol solution; (4) under 80rpm stirring state, polyvinyl alcohol aqueous solution and crosslinking agent aqueous solution are mixed to obtain a mixed solution, and then t...

Embodiment 2

[0059] Preparation of high water resistance and high weather resistance adhesive: (1) Preparation of polyvinyl alcohol aqueous solution: Weigh 90 parts of pure water, add 10 parts of polyvinyl alcohol resin under stirring at 100 rpm, pre-dissolve for 45 minutes, and make polyvinyl alcohol resin Fully swell, heat up to 90°C, keep warm for 90min, cool down to room temperature, and obtain an aqueous solution of polyvinyl alcohol; (2) weigh 95 parts of pure water, add 5 parts of hydroxyethyl cellulose resin under stirring at 100 rpm, and make it fully (3) Weigh 3 parts of oleic acid and 0.8 parts of γ-methacryloxypropyltrimethoxysilane coupling agent, and add them to 10 parts of absolute ethanol under stirring at 100rpm , to obtain the hydrophobic surfactant alcohol solution; (4) under the 100rpm stirring state, the polyvinyl alcohol aqueous solution and the crosslinking agent aqueous solution are mixed to obtain a mixed solution, and then the hydrophobic surfactant alcohol solutio...

Embodiment 3

[0063] Preparation of high water resistance and high weather resistance adhesive: (1) Preparation of polyvinyl alcohol aqueous solution: Weigh 85 parts of pure water, stir at 90rpm, add 15 parts of polyvinyl alcohol resin, pre-dissolve for 30min, make polyvinyl alcohol resin Fully swell, heat up to 100°C, keep warm for 60min, cool down to room temperature, and obtain an aqueous solution of polyvinyl alcohol; (2) weigh 85 parts of pure water, add 15 parts of carboxymethylcellulose resin under stirring at 90rpm, and make it fully Dissolve to obtain cross-linking agent aqueous solution; (3) take by weighing 5 parts of lauric acid and 0.5 part of vinyltriethoxysilane coupling agent, join in 80 parts of dehydrated alcohol under stirring at 90rpm, obtain hydrophobic surfactant Alcohol solution; (4) under 90rpm stirring state, polyvinyl alcohol aqueous solution and crosslinking agent aqueous solution are mixed to obtain a mixed solution, and then the hydrophobic surfactant alcohol sol...

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Abstract

The invention discloses a high-water-resistance and weather-resistance polarizer adhesive, a polarizer and a preparation method. The adhesive comprises, by weight, 4-30 parts of polyvinyl alcohol resin, 150-195.2 parts of pure water, 0.8-20 parts of hydroxyl or carboxyl-containing cellulose resin, 1-10 parts of hydrophobic surface active agents, 0.05-1 part of coupling agents, 10-100 parts of absolute ethyl alcohol and an appropriate quantity of pH (potential of hydrogen) conditioning agents. According to the adhesive, etherification or esterification reaction of a hydroxyl / carboxyl functionalgroup of cellulose and hydroxyl in polyvinyl alcohol resin is implemented, high covalent ether or ester bonds are formed, water resistance of a polarizer is improved, a lager network structure is formed, high temperature resistance and bonding strength of the polarizer can be effectively improved, and the adhesive is an environment-friendly material, free from toxicity and irritated smell and applicable to wide application.

Description

technical field [0001] The invention relates to a binder for polarizing plates with high water resistance and high weather resistance, a polarizing plate and a preparation method, and belongs to the technical field of polarizing plates. Background technique [0002] Polarizing plate is one of the indispensable structural parts of liquid crystal display. Its function is to generate polarized light from non-polarized natural light, so that light of a certain polarization direction can pass through, so that the liquid crystal panel has the possibility of imaging. The basic structure of the polarizing plate is composed of 5 kinds of film materials, among which the polarizer PVA (polyvinyl alcohol) film is mainly used for polarizing light. Combined with a protective TAC (triacetate cellulose) film. In addition, there are protective film layers, release film layers and PSA (pressure-sensitive adhesive) layers, which are laminated optical composite laminates. Polarizers are widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J101/28G02B1/14G02B5/30
Inventor 马春霞黄姿菁
Owner 恒美光电股份有限公司
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