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UV-curing adhesive based polarizing plate and preparation method thereof

An adhesive and polarizing plate technology, applied in the direction of adhesives, non-polymer organic compound adhesives, polarizing elements, etc., can solve the problems of inability to pass light, light leakage from polarizing plates, dark light brightness, etc., to improve durability and prevent viscosity. and reaction speed, the effect of increasing interfacial adhesion

Active Publication Date: 2020-12-01
山东泰特尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rotate the relative angle of the two polarizers, and you will find that the brightness of the light will become darker with the difference in the relative angle; when the angles of the fences of the two polarizers are perpendicular to each other, the light will not pass through at all.
As an important raw material for polarizing plates, adhesives are very important. The existing cationic curing adhesives have high adhesion and heat resistance to various films, but there will be dark polymerization (delayed curing), so the cured product of the adhesive is in volume When stored in the form of wood, there will be a problem of easy curling and deformation
In addition, the polarizing plate may cause serious light leakage under conditions worse than heat and humidity (such as soaking in warm water at 60°C)

Method used

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  • UV-curing adhesive based polarizing plate and preparation method thereof
  • UV-curing adhesive based polarizing plate and preparation method thereof
  • UV-curing adhesive based polarizing plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] According to the parts by weight of Table 1, bifunctional alicyclic epoxy compounds, polyglycidyl ethers of aromatic compounds, bifunctional (meth)acrylic compounds, vinyl ether compounds, carboxylic acid compounds containing unsaturated double bonds, Cationic photoinitiators and free radical initiators are routinely mixed to prepare UV-curable adhesives for polarizers. Wherein, in embodiment 5, the vinyl ether compound is 4-hydroxybutyl vinyl ether; in embodiment 6, the carboxylic acid compound containing unsaturated double bonds is fumaric acid; in embodiment 10, will contain The carboxylic acid compound with saturated double bond is replaced with polycaprolactone trihydric alcohol, a conventional adhesion promoter; the rest of the raw materials are as above A to G.

Embodiment 8

[0054] The peeling force of Example 8 reaches 5.6N / cm (PET film), 5.3N / cm (TAC film), 5.5N / cm (COP film); the white edge of the existing commercially available adhesive polarizing plate is very small after heat and humidity resistance, 0.1 mm, but the peel force is low and selective, 3.1N / cm (PET film), 3.3N / cm (TAC film), 1.9N / cm (COP film).

[0055] Table 2 embodiment, comparative example test result

[0056]

[0057]

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Abstract

The invention discloses a UV-curing adhesive based polarizing plate and a preparation method thereof. The preparation method comprises the following steps: coating one surface of an optical film witha UV-curing adhesive, and then covering a polarizer on the optical film; and carrying out ultraviolet curing to obtain the polarizing plate. The adhesive used in the invention enables an epoxy compound and a (methyl)acrylate compound to be fully cured without reduction in bonding strength, the transparency of an adhesive layer can be prevented from being reduced, and overflowing of an initiator isalso reduced; a compound formed after the adhesive provided by the invention is mixed and cured contains carboxyl groups and can be combined with water in a high-humidity environment at first, so theproblem that the adhesiveness of a free radical curable adhesive composition is reduced since hydroxyl groups existing on the surface of a polyvinyl alcohol (PVA) film will be preferentially combinedwith hydrogen bonds in moisture instead of being combined with hydrogen bonds in the free radical curable adhesive composition in a high-humidity environment in the prior art is overcome.

Description

technical field [0001] The invention relates to a UV curing adhesive-based polarizing plate. Background technique [0002] The traveling direction of the light wave is perpendicular to the electric field and magnetic field, and the electric field and magnetic field components of the light wave itself are also perpendicular to each other, that is to say, the traveling direction and the electric field and magnetic field components are parallel to each other. At this time, the polarizing plate will block the component perpendicular to the polarizing plate, and only allow the component parallel to the polarizing plate to pass through. So if you pick up a polarizer and look at the light source, the light becomes darker, but if you stack two polarizers together, it will be different. Rotate the relative angle of the two polarizers, and you will find that the brightness of the light will become darker with the difference in the relative angle; when the fence angles of the two pola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C08J7/14G02B5/30C08L29/04
CPCC09J4/00C08J7/14G02B5/30C08J2329/04
Inventor 孟允韩建伟
Owner 山东泰特尔新材料科技有限公司
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