Cationic initiator, preparation method thereof, light-cured composition and application of light-cured composition
A cationic initiator and compound technology, used in the field of photocuring, can solve the problems of easy migration and odor, and achieve the effects of high stability, improved quantum absorption efficiency, and no VOC emission curing speed
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[0052] Another aspect of the present application also provides a kind of preparation method of above-mentioned cationic initiator, and this preparation method comprises:
[0053] S1, in the presence of the first organic solvent, the raw material a is subjected to a substitution reaction with a halogenated compound to generate an intermediate a, and the synthetic route is as follows:
[0054]
[0055] Among them, X 1 and x 2 are independently selected from halogen atoms;
[0056] S2, in the presence of a second organic solvent, the intermediate a is subjected to a Friedel-Crafts reaction with different sulfoxides to obtain the corresponding intermediate b 1 ~b 5 ,
[0057]
[0058]
[0059] S3, performing an ion exchange reaction between intermediates b1-b5 and raw material d to obtain the target product;
[0060]
[0061]
[0062] The raw materials used in the above-mentioned method have sufficient sources of supply, and the process is short, easy to operat...
Embodiment 1
[0072] (1) Preparation of 9,9-dibenzylfluorene
[0073]
[0074] Add 150g of dichloromethane, 24g of fluorene, 28.05g of benzyl chloride and 0.54g of tetrabutylammonium bromide into a 250mL four-necked flask, stir under nitrogen protection, and slowly dropwise add 50% hydroxide 40g of sodium solution, while controlling the temperature of the system below 30°C, the addition was completed in 15 minutes, and then the heating reaction was carried out in a water bath of 50°C, and the nitrogen protection was stopped. After the reaction system was kept warm for 8 hours, the reaction was stopped to obtain the product system.
[0075] After the temperature of the product system dropped to room temperature, 60 g of water was added, the product system was separated into layers, and the product of the organic layer was separated. The organic layer product was washed 3 times with 200 g of water until neutral, and the organic phase was separated. Then pour the above organic phase into a...
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