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Light-curing edge sealing adhesive

A technology of edge sealing adhesive and light curing, which is applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., and can solve problems such as glass breakage, uneven force, and low tensile strength

Active Publication Date: 2014-06-18
惠晶显示科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The viscosity of the light-curing edge sealant will affect the bonding effect of the four sides of the liquid crystal glass. If the viscosity is low, although it is beneficial for the UV glue to penetrate into the gap between the glasses, it will affect the bonding performance between the glasses, resulting in the adhesion between the glass and the glue. Adhesion decreases, and during the dispensing process, air bubbles will be generated due to the pressure difference between the inside and outside of the glass. Two dispensing is required to eliminate the air bubbles or use high-viscosity UV glue to repair the air bubbles; if the viscosity is too high, although the glass and glass can be increased The adhesion of UV glue, but there will be glue breakage during the dispensing process, and the speed of UV glue penetrating into the glass gap is slow, which affects production efficiency
In addition, the existing UV curing shrinkage rate is relatively high. On the one hand, it will lead to poor flexibility and low tensile strength of the cured film. In the actual handling process, some parts of the glue and glass will be peeled off, so that the acid will invade the LCD screen. On the other hand, it will also cause the edge of the cured film to become jagged, which will lead to glass damage due to uneven force on the bonding position between the glass and the glue in the subsequent grinding process

Method used

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Examples

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Effect test

preparation example Construction

[0041] The embodiment of the present invention provides a method for preparing an edge sealant that has higher bonding strength than the existing edge sealant, is suitable for etching and thinning liquid crystal glass, and can improve the yield rate, comprising the following steps: preparing the sealant Stir the raw materials of the edge glue evenly at a temperature lower than 30°C; the ratio of the raw materials for the preparation of the edge glue is: 30-50% of the main resin, 10-30% of the auxiliary resin, and 10-30% of the active monomer 25%~45%, adhesion promoter 6~10%, photoinitiator 3%~5%, auxiliary agent 2%~5%, pigment or dye 0.5%~5%; Stir and mix evenly at the temperature of ℃~50℃.

[0042] Test the viscosity, if the test result does not meet the set viscosity threshold, then adjust the viscosity to the viscosity threshold, the set viscosity threshold is the viscosity range of the prepared edge sealant. Viscosity is the main parameter that determines the performance ...

Embodiment 1

[0044] Polyurethane acrylic photocurable resin 46%, polyether-based polyurethane acrylate 8%, 1% photoinitiator 369, trimethylolpropane tri(meth)acrylate 15%, pentaerythritol tri(meth)acrylate 15% , 6% phosphate adhesion promoter containing unsaturated functional groups, 2% additives and 47% pigment P.R.2547%, stir and mix evenly.

Embodiment 2

[0046] The embodiment of the present invention also provides another preparation method of edge sealant and the edge sealant prepared by this method, the difference from that in Example 1 is that the composition and proportion (mass percentage) of each raw material for preparing the edge sealant are different ,details as follows:

[0047] Polyether-based urethane acrylate 40%, epoxy acrylic acid 15%, photoinitiator 369 2%, trimethylolpropane tri(meth)acrylate 18%, ethoxylated trimethylolpropane tri(meth)acrylate base) acrylate 16%, carboxyl functional group-containing acrylate adhesion promoter 6% and other additives 3%, stir and mix evenly.

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Abstract

The invention discloses a light-curing adhesive and in particular relates to an ultraviolet-curing adhesive. The light-curing adhesive comprises the following components in percentage by mass: 10%-75% of matrix resin, 5%-50% of auxiliary resin, 10%-70% of activated monomer of acrylate, allyl compound or vinyl compound, 5%-15% of adhesion accelerator, 1%-10% of photoinitiator and 0.5-10% of auxiliary agent. The light-curing adhesive provided by the invention has fast curing capability, high bonding strength and low internal stress; an obtained cured layer is soft and has excellent hydrofluoric acid resistance.

Description

technical field [0001] The present invention relates to a UV-curable adhesive, in particular to a photo-curable adhesive used for etching and thinning liquid crystal glass of a flat panel display (FPD). Background technique [0002] In the field of flat panel display, liquid crystal glass is widely used in the display screens of mobile phones, TVs, tablet computers, etc. Liquid crystal glass generally consists of a color filter surface, a TFT surface and a liquid crystal layer to form a single liquid crystal layer, and the two single liquid crystal layers are bonded together Form a complete liquid crystal display screen. [0003] Mobile phones, tablet computers, etc. have high requirements on the thickness of the LCD screen. Generally, the thickness of the LCD screen prepared for the first time is relatively large, and it needs to be thinned. The method of thinning treatment is to etch with hydrofluoric acid. Since the liquid crystal glass screen is made of double-sided bon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C09J163/10C09J147/00
Inventor 王伟
Owner 惠晶显示科技(苏州)有限公司
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