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
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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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