Dendritic fluorescein sodium-iodonium salt visible light initiator and preparation method and application thereof
A technology of sodium fluorescein and visible light, applied in the field of photoinitiation, can solve the problems of single function, high volatility, weak anti-migration ability, etc., and achieve the effect of strong penetrating ability, high initiation efficiency and cheap light source
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[0031] The preparation method of dendritic fluorescein sodium-iodonium salt visible light initiator of the present invention comprises the steps:
[0032] (1) The end group of the intermediate is a dendrimer (PAE (=) of 8 acrylates 8 ) synthesis: mix trimethylolpropane triacrylate, ethylenediamine, and anhydrous methanol, heat to 30°C, react for 6 hours, wash with anhydrous methanol to obtain a colorless and transparent viscous liquid, and react The formula is as follows:
[0033]
[0034] (2) Dendrimers with 8 primary amino groups at the end of the intermediate (PAE(NH 2 ) 8 ) synthesis: the PAE (=) 8 Mix with ethylenediamine, heat to 30°C, react for 24 hours, distill under reduced pressure, wash with ethyl acetate to obtain light yellow transparent viscous liquid, the reaction formula is as follows:
[0035]
[0036] (3) Synthesis of intermediate diphenyliodonium chloride: mix benzene, acetic anhydride, and potassium iodate, react in a brine ice bath, add acetic an...
Embodiment 1
[0042] Embodiment 1: the preparation of visible light initiator
[0043] (1) The end group of the intermediate is a dendrimer (PAE (=) of 8 acrylates 8 )Synthesis:
[0044] Mix 60g of trimethylolpropane triacrylate, 2.4g of ethylenediamine, and 30mL of anhydrous methanol, heat to 30°C, react for 6 hours, wash with anhydrous methanol, and obtain a colorless and transparent viscous liquid.
[0045] (2) Dendrimers with 8 primary amino groups at the end of the intermediate (PAE(NH 2 ) 8 )Synthesis:
[0046] 4.665g PAE(=) 8 Mix with 108g of ethylenediamine, heat to 30-50°C, react for 24 hours, distill under reduced pressure, wash with ethyl acetate to obtain light yellow transparent viscous liquid.
[0047] (3) Synthesis of intermediate diphenyliodonium chloride salt:
[0048] Mix 9mL of benzene, 10mL of acetic anhydride, and 10.7g of potassium iodate, and slowly drop in a mixture of 7mL of concentrated sulfuric acid and 10mL of acetic anhydride in a brine ice bath (about -5°C)...
Embodiment 2
[0055] Embodiment 2: PAE-FS (IPh 2 ) 2 Visible Light Initiated Unsaturated Resins
[0056] PAE-FS (IPh 2 ) 2 Visible Light Initiated Epoxy Acrylates:
[0057] Get 1.3g epoxy acrylate and 0.7g reactive diluent TMPTA, stir and mix, add the various visible photoinitiators (PAE-FS of the present invention (IPh 2 ) 2 Photoinitiator, FS(IPh 2 ) 2 Photoinitiator and FS+10% by weight of the combined photoinitiator (i.e. FS+10%Vc) formed by the co-initiator vitamin C), mix with a mixer, be coated on a glass sheet into an approximately 0.1mm thick film, place Curing under 500W LED lamp radiation, record the curing time. The results are shown in Table 1.
[0058] Table 1 Initiator triggers epoxy acrylate curing time
[0059]
[0060]
[0061] PAE-FS (IPh 2 ) 2 Visible Light Initiated Hyperbranched Polyester Acrylates:
[0062] Get 1.3g hyperbranched polyester acrylate and 0.7g reactive diluent TMPTA, stir and mix uniformly, add various visible photoinitiators (PAE-FS (...
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