Preparation method of deacidification type organic silicon adhesive
A silicone adhesive, deacidification technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problem of acetic acid having a pungent odor, unsuitable for electronic appliances, and unsuitable for cement bonding, etc. Achieve excellent hydrophobic properties, improved shelf life, and improved chemical resistance
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Embodiment 1
[0027] Preparation of acetic acid type crosslinker:
[0028] Step S11. Add sulfuric acid solution to 2-hydroxy-3-methoxybenzaldehyde in an ice-water bath. After adding, stir and react for 50 minutes at 15°C, and then dropwise add α, α, α -Trifluoroacetophenone, heated up to 60°C, stirred for 16 hours, after the reaction, mixed with an equal volume of 50°C deionized water, filtered while hot, and dried the obtained filter cake to obtain intermediate 1; wherein, The mass fraction of sulfuric acid solution is 80%, and the dosage ratio of 2-hydroxy-3-methoxybenzaldehyde, sulfuric acid solution and α,α,α-trifluoroacetophenone is 1.5g:5mL:1.7g;
[0029] Step S12, mixing absolute ethanol and intermediate 1, adding glacial acetic acid, adding an ethanol solution in which amino monomers are dissolved, and heating under reflux at 80°C for 12 hours. After the reaction, the solvent is removed by rotary evaporation to obtain Schiff Alkaline compound; wherein, the amino monomer is aniline;...
Embodiment 2
[0033] Preparation of acetic acid type crosslinker:
[0034] Step S11. Add sulfuric acid solution to 2-hydroxy-3-methoxybenzaldehyde in an ice-water bath. After adding, stir and react for 50 minutes at 15°C, and then dropwise add α, α, α -Trifluoroacetophenone, heated up to 60°C, stirred for 16 hours, after the reaction, mixed with an equal volume of 50°C deionized water, filtered while hot, and dried the obtained filter cake to obtain intermediate 1; wherein, The mass fraction of sulfuric acid solution is 80%, and the dosage ratio of 2-hydroxy-3-methoxybenzaldehyde, sulfuric acid solution and α,α,α-trifluoroacetophenone is 1.5g:5mL:1.7g;
[0035] Step S12, mixing absolute ethanol and intermediate 1, adding glacial acetic acid, adding an ethanol solution in which amino monomers are dissolved, and heating under reflux at 80°C for 12 hours. After the reaction, the solvent is removed by rotary evaporation to obtain Schiff Alkaline compound; wherein, the amino monomer is aniline;...
Embodiment 3
[0039] Preparation of modified fillers:
[0040]Dry the precipitated white carbon black at 150°C for 24 hours, then mix the dried precipitated white carbon black and glycidyl methacrylate according to a certain ratio, and ball mill for 4 hours in a ball mill with a rotating speed of 500r / min. After finishing, wash with acetone, filter, and dry the filter cake at 80° C. to a constant weight to obtain a modified filler. Wherein, the mass ratio of dried precipitated silica to glycidyl methacrylate is 5:2.1.
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