Ultraviolet curing liquid optical clear adhesive and preparation method thereof

A technology of ultraviolet light and optical glue, which is applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of late start of UV curing adhesive research, industrialization process to be developed and researched, production scale to be expanded, etc. , to achieve good light transmittance and refractive index, moderate viscosity, good anti-aging performance

Inactive Publication Date: 2013-04-10
SHENZHEN JINLIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) Among the hundreds of adhesive production units in China, only a few companies produce UV-curable adhesives. Although there are some research reports in the literature, few of them are actually industrialized. Therefore, the industrialization process needs to be developed and researched. Production scale to be expanded
[0007] 2) Domestic research on UV-curable adhesives started relatively late, and there is a large gap with foreign countries in the fields of research, development, production, and application. Therefore, it is necessary to increase the intensity and depth of research and development in this attractive field

Method used

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  • Ultraviolet curing liquid optical clear adhesive and preparation method thereof
  • Ultraviolet curing liquid optical clear adhesive and preparation method thereof
  • Ultraviolet curing liquid optical clear adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1, the preparation of urethane acrylate prepolymer: including the following steps: add toluene diisocyanate into a four-necked flask equipped with a stirrer, thermometer, condenser and constant pressure funnel, protect it with nitrogen, and store it at room temperature at 20-25°C 1. Under the condition that the stirring speed is 80-100 rev / min, slowly add polyethylene glycol dropwise from the constant pressure funnel. The mass ratio of the toluene diisocyanate to the polyethylene glycol is 0.95:1. After 3 hours of heat preservation reaction, gradually add 32.5% hydroxyethyl acrylate dropwise for reaction, and add 0.1% polymerization inhibitor at the same time, gradually raise the temperature to 65-70°C after dropping, and react for about 4 hours. When the temperature in the four-neck flask dropped to 50°C, 0.5% by mass of absolute ethanol was added to react for 20 minutes, and suction filtered to obtain the polyurethane acrylate prepolymer (PUA). After the prepare...

Embodiment 2

[0040] Same as Example 1, the difference is:

[0041] The specific operation steps of the step 2 are: add 38% of the urethane acrylate prepolymer prepared in the step 1 into a 5L four-necked flask equipped with a stirrer and a thermometer, and mix the urethane acrylate prepolymer with Free radical reactive diluent 48% is mixed and stirred evenly, and described free radical reactive diluent is hydroxyethyl acrylate, tripropylene glycol diacrylate and trimethylolpropane triacrylate as a mixture of three, adding diphthalic acid diluent Octyl ester 10%, BAPO3%, KH-5700.6%, BYK-1410.3%, 2640.1%, stirred for 1-2h until the dioctyl phthalate, the BAPO, the KH-570, the BYK -141. After the 264 component is completely dissolved, the finished UV-curable liquid optical adhesive can be obtained.

Embodiment 3

[0043] Same as Example 1, the difference is:

[0044] The specific operation steps of the step 2 are: add 45% of the urethane acrylate prepolymer prepared in the step 1 into a 5L four-necked flask equipped with a stirrer and a thermometer, and mix the urethane acrylate prepolymer with 40% of the free radical active diluent was mixed and stirred evenly. The free radical active diluent was a mixture of hydroxyethyl acrylate, tripropylene glycol diacrylate and trimethylolpropane triacrylate. Octyl ester 10%, BAPO4%, KH-5700.6%, BYK-1410.3%, 2640.1%, stirred for 1-2h until the dioctyl phthalate, the BAPO, the KH-570, the BYK -141. After the 264 component is completely dissolved, the finished UV-curable liquid optical adhesive can be obtained.

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Abstract

The invention relates to an ultraviolet curing liquid optical clear adhesive and a preparation method thereof, and belongs to the field of bonding adhesives. The method comprises the steps that toluene diisocyanate, polyethylene glycol and hydroxyethyl acrylate are taken as raw materials; a urethane acrylate prepolymer is synthesized through polystep reaction by a bulk method; the prepolymer is taken as a main body; a photoinitiator, a composite reactive diluent and other assistants are added; and then the ultraviolet curing liquid optical clear adhesive is prepared. The ultraviolet curing liquid optical clear adhesive prepared by the preparation method has the characteristics that the ultraviolet curing liquid optical clear adhesive is low in smell, moderate in viscosity, good in flexibility, high in light transmittance and refractive index, high in bonding strength, waterproof, and good in cold and heat shock resistance, weather resistance and ageing resistance. The ultraviolet curing liquid optical clear adhesive is completely transparent after being cured, and can keep stable high transparency and is free from yellowing, whitening and degumming for a long term in high-temperature and high-humidity environments.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a preparation method of ultraviolet light curing liquid optical adhesive. Background technique [0002] Liquid Optical Clear Adhesive (LOCA), also known as optical UV glue or UV light curing adhesive, is a one-component, medium viscosity, high transparency UV light curing adhesive. [0003] UV-curable liquid optical glue is a special adhesive for transparent optical components. It is a new generation of capacitive screen glue developed to meet the needs of the development of modern electronic products. The electronic products produced by the modern electronics industry are all developing in the direction of lightness and thinness. The traditional bonding process can no longer meet the needs of the development of modern electronic products. The modern glue industry must keep up with the pace of development of the electronics industry. UV-curable liquid optical glue is one of the new-gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/14C08G18/67C08G18/48
Inventor 程云涛过蓉晖
Owner SHENZHEN JINLIAN TECH
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