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Urethane acrylate intermediate of adhesive for bonding touch screen and preparation method thereof

A polyurethane acrylate, touch screen technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of decreased light transmission performance, strong shrinkage stress, poor bonding strength, etc., and achieve shrinkage rate. Low, flexible and weather resistant effect

Active Publication Date: 2012-07-25
连云港华海诚科电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The urethane acrylate prepolymer commonly used in the existing acrylic resin adhesive system is generally bifunctional or multifunctional, and has small molecular weight, poor bonding strength to optical glass (ITO), low refractive index (below 1.485), Shortcomings such as strong shrinkage stress, it is easy to cause rework difficulties when bonding extremely brittle optical glass, or the light transmission performance decreases after bonding, etc.

Method used

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  • Urethane acrylate intermediate of adhesive for bonding touch screen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, a kind of urethane acrylate intermediate of glue for bonding touch screen, it is made of the raw materials of following weight ratio:

[0028] Polyether polyol 55; Polyol phosphate 1;

[0029] Mercapto polyether polyol 1; Diisocyanate 7;

[0030] Catalyst 0.1; Antioxidant 0.3;

[0031] Thinner 15; Capping agent 1;

[0032] Stabilizer 0.1;

[0033] The polyether polyol is selected from polypropylene glycol with a molecular weight of 2000 to 3000, polyoxypropylene glycol, polytetrahydrofuran diol, and one or any mixture of grafted polyether polyols;

[0034] The polyol phosphate is selected from one of monobasic polyoxyethylene ether phosphates, dibasic polyoxyethylene ether phosphates, phosphonate mixed esters of monobasic polyhydroxy compounds, phosphonate mixed esters of dibasic polyhydroxy compounds or any mixture of

[0035] Described mercapto polyether polyol is mercapto polyether polyol;

[0036] The diisocyanate is selected from one or any mixt...

Embodiment 2

[0042] Embodiment 2, a kind of urethane acrylate intermediate of glue for bonding touch screen, it is made of the raw materials of following weight ratio:

[0043] Polyether polyol 75; 3;

[0044] Mercapto polyether polyol 3; Diisocyanate 15;

[0045]Catalyst 0.5; Antioxidant 0.6;

[0046] Diluent 40; Capping agent 5;

[0047] Stabilizer 0.3;

[0048] The selection of each raw material is the same as in Example 1.

[0049] The steps of the preparation method of the urethane acrylate intermediate of the touch screen bonding glue in this embodiment are as follows: vacuumize and dehydrate polyether polyol, polyol phosphate, and mercapto polyether polyol at a temperature of 80°C according to the weight ratio 1 hour; then, add catalyst, diisocyanate and stir fully at 85°C, react for 3 hours, until the content of isocyanate is less than 2%, add antioxidant, stabilizer, diluent and blocking agent, react for 2 hours; Finally, the temperature was lowered to 70° C., and the materia...

Embodiment 3

[0050] Embodiment 3, a kind of urethane acrylate intermediate of glue for bonding touch screen, it is made of the raw materials of following weight ratio:

[0051] Polyether polyol 65; Polyol phosphate 2;

[0052] Mercapto polyether polyol 2; Diisocyanate 12;

[0053] Catalyst 0.3; Antioxidant 0.4;

[0054] Thinner 30; Capping agent 2;

[0055] Stabilizer 0.2;

[0056] The selection of each raw material is the same as in Example 1.

[0057] The steps of the preparation method of the urethane acrylate intermediate of the adhesive for touch screen bonding in this embodiment are as follows: vacuumize the polyether polyol, polyol phosphate, and mercapto polyether polyol at a temperature of 80°C according to the weight ratio Dehydration for 2 hours; then, add catalyst, diisocyanate and stir well at 90°C, react for 4 hours, until the content of isocyanate is less than 2%, add antioxidant, stabilizer, diluent and blocking agent, react for 4 hours ; Finally, the temperature was l...

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Abstract

The invention discloses a urethane acrylate intermediate of an adhesive for bonding a touch screen. The urethane acrylate intermediate is prepared from the following raw materials in parts by weight: 55-75 parts of polyether polyol, 1-3 parts of polyhydric alcohol phosphate ester, 1-3 parts of mercapto polyether polyol, 7-15 parts of diisocyanate, 0.1-0.5 part of catalyst, 0.3-0.6 part of antioxidant, 15-40 parts of diluent, 1-5 parts of end-capping reagent and 0.1-0.3 part of stabilizing agent. The invention further discloses a preparation method of the urethane acrylate intermediate. The urethane acrylate intermediate of the adhesive for bonding the touch screen has the excellent characteristics of high refractive index, high flexibility, high weather resistance, low shrinkage ratio, high light permeability and the like. The urethane acrylate intermediate can be applied to production of the adhesive for bonding the touch screen, including single ultraviolet curing, ultraviolet curing heating curing, ultraviolet humidifying air curing and ultraviolet humidifying air heating and curing.

Description

technical field [0001] The invention relates to a urethane acrylate prepolymer, in particular to a urethane acrylate intermediate of an adhesive for bonding a touch screen, and the invention also relates to a preparation method of the aforementioned urethane acrylate intermediate. Background technique [0002] Adhesives for touch screens belong to liquid optical adhesive (LOCA). The traditional method to solve the problem of bonding the touch screen to the optical sensor or the mutual bonding of the touch screens is to use transparent adhesive tape. The liquid optical adhesive is packaged between the touch screen and the sensor with glue. Greatly improved the optical properties of the touch screen display, such as clarity, light transmittance, etc. Liquid optical glue is a liquid adhesive used in the manufacture of touch screens and display devices to bond plastic, glass or other protective screens to the main light sensor, or to bond protective screens to each other. Liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/50C08G18/48C08G18/38C09J175/08
Inventor 谢雷秦苏琼季青陶军韩江龙王志孙勇张永成李兰侠
Owner 连云港华海诚科电子材料有限公司
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