Optical resin monomer with high refractive index and preparation method thereof
A technology of refractive index and optical resin, which is applied in the field of high refractive index optical resin monomer and its preparation, can solve the problems of poor impact strength and heat resistance, and achieve good heat resistance
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Embodiment 1
[0083] Example 1: Using NBS as a halogenated reagent to prepare a high refractive index optical resin monomer: (n=0, m=3)
[0084] The steps are as follows: (such as figure 1 shown)
[0085] Raw materials are aromatic hydrocarbons, NBS, BPO, thiourea, sodium hydroxide, hydrochloric acid, epichlorohydrin, potassium thiocyanate; of which aromatic hydrocarbons: NBS: BPO: thiourea: sodium hydroxide: hydrochloric acid: epichlorohydrin: thiocyanate The molar percentage of potassium acid potassium is 1:3~5:0.2~0.4:3~5:9~12:6~10:3~5:10~15;
[0086] Step 1: Synthesis of mesitylene: Add 5g of mesitylene, 25.5g of NBS, and 0.1g of BPO as an initiator in a single-port bottle, and then add CCl 4As a solvent, magnetically stirred, heated to reflux, and reacted for 24h. After the reaction was cooled, a large amount of white solids precipitated out. The solids were removed by filtration, and the solvent was removed by rotary evaporation to obtain a light yellow viscous liquid, which was ...
Embodiment 2
[0093] Example 2: Preparation of high refractive index optical resin monomer by direct halomethylation method: (n=3, m=3)
[0094] The steps are as follows (such as figure 2 ):
[0095] The raw materials are aromatic hydrocarbons, paraformaldehyde, glacial acetic acid, acetic acid solution of hydrogen bromide, thiourea, sodium hydroxide, hydrochloric acid, epichlorohydrin, potassium thiocyanate; among them, aromatic hydrocarbons, paraformaldehyde, glacial acetic acid, hydrogen bromide The molar percentage of acetic acid solution, thiourea, sodium hydroxide, hydrochloric acid, epichlorohydrin and potassium thiocyanate is 1:3~4:15~20:12~20:3~5:9~12:6~ 10: 3-5: 10-15.
[0096] Step 1: Synthesis of 1,3,5-tribromomethyl-2,4,6-trimethylbenzene (A1): Add 12.00 g (0.10 mol) of mesitylene and 10.00 paraformaldehyde in a 250 ml three-necked flask g (0.33 mol), 100 ml of glacial acetic acid, 70 ml of hydrogen bromide in acetic acid solution (31%), react at 120°C for 11 h. During the...
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