Light-curing edge sealing adhesive

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...

Examples

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.

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...

Examples

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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