Free radical- cation type ultraviolet photo-curing cementing agent and its preparation method

A cationic curing and cationic technology, applied in the direction of adhesives, non-polymer organic compound adhesives, etc., can solve the problems of unstable performance, uneven local curing, etc., and achieve the reduction of curing volume shrinkage and the improvement of bonding strength , a wide range of effects

Inactive Publication Date: 2007-08-01
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it uses a mixture of free radical curing resin and cationic curing resin, and the curing forms an interpenetrating network (IPN) structure. The system has problems such as unstable performance, uneven local curing, and compatibility of the two oligomers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Preparation of oligomers containing free radical curing groups and cationic curing groups. The method is: ①Add 100 parts of bisphenol A epoxy resin E51 into a three-necked flask, stir and heat to 100°C; ②Under stirring, mix N,N-dimethylbenzylamine and 0.5% p-hydroxyanisole with epoxy resin weight ratio is dissolved in an appropriate amount of methacrylic acid; Add the mixed solution of the above epoxy resin, control the weight ratio of bisphenol A epoxy resin E51 and methacrylic acid to 100:21.9, stir and react, titrate with 0.1mol / L sodium hydroxide, and calculate the acidity of the system value and the conversion rate of carboxylic acid in the reaction process, when the acid value in the reaction system is less than 3mgKOH / g, it is considered that the esterification reaction is completed, and after cooling, it is an oligomer containing free radical curing groups and cationic curing groups. stand-by.

[0020] 2. The composition and ratio of free radical-cationic U...

Embodiment 2 to Embodiment 48

[0024] The preparation method of the oligomer containing free radical curing group and cationic curing group in embodiment 2 to embodiment 48 is basically the same as that of embodiment 1, and the preparation method of free radical-cationic ultraviolet light curing adhesive is basically the same as that of embodiment 1. Same, the numerical value of each component and corresponding weight ratio (expressed in parts by weight) is shown in Table 1 to Table 8, and the shear strength of free radical-cationic UV-curable adhesive is specifically shown in Table 1 to Table 8 (Table The middle symbol " / " means none).

[0025] Table 1

[0026]

Component name, parts by weight and performance test data

Example

1

2

3

4

5

6

Low

get together

thing

epoxy resin

Bisphenol A epoxy resin E51

100

100

100

100

100

100

catalyst

N,N-Dimethylbenz...

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PUM

PropertyMeasurementUnit
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Abstract

The invention discloses a free radical- cationic ultraviolet light curing adhesive agent and the preparing method. Said adhesive agent comprises diluting agent, light initiating agent and low-molecular polymer which contains free radical and cation. Said low molecular polymer is prepared with epoxy resin, acroleic acid, catalyst and inhibitor. The curing speed of ultraviolet light curing adhesive agent is high, the double- bond group of acrylate is cured in a short time after radiation by ultraviolet light to make the adhesive agent possess initial adhesive force, the epoxy group continues cross- linking and curing after ultraviolet light withdraw according to cation initiation principle, and the adhesive force is reinforced further to meet requiement for adhesive force by electronics and optical products. The invention is characterized by no solvent, simple operation, convenient connection process and suitability for batch production.

Description

technical field [0001] The invention relates to a curing adhesive and a preparation method thereof, in particular to an ultraviolet light curing adhesive and a preparation method thereof. Background technique [0002] UV-curable adhesives have the characteristics of long storage period, no solvent, and low odor during and after curing. The more prominent advantages are fast curing speed and good comprehensive performance. UV-curable adhesives cure in an instant, much faster than water-based adhesives or even hot-melt adhesives. At the same time, the UV-curable adhesive has a network cross-linked structure, which has excellent heat resistance, moisture resistance, and corrosion resistance. Therefore, it is best to use UV-curable adhesives under the conditions of fast curing and high performance. choose. Moreover, the UV-curable adhesive is cured at room temperature, which can avoid thermal damage to the substrate and thermal burns to the operator, so it is safer. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/06
Inventor 刘红波李荣先缪国元刘恒权薛亚波
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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