High refractive index organic borosilicate adhesion promoter and its preparation method and application
An adhesion promoter, high refractive index technology, applied in polymer adhesive additives, adhesives, adhesive additives, etc., can solve the problem of difficult control of reaction conditions, easy ring-opening of epoxy groups, poor compatibility of silica gel, etc. problem, to achieve the effect of cheap raw materials, good bonding performance and good compatibility
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Embodiment 1
[0023] 21.63g of diphenylsilanediol, 8.28g of 3-(2,3-epoxypropoxy)propyltrimethoxysilane, 8.13g of 3-methacryloxypropyltrimethoxysilane, 3.12g of boric acid Add trimethyl ester and 20g of toluene into a 250mL three-neck flask equipped with a thermometer, mechanical stirring, and a condensing reflux tube, stir evenly at room temperature, add 0.41g of tetraethyl titanate, control the reaction temperature at 30°C, react for 12h, and then control The degree of vacuum was 0.06 MPa, the temperature was 90°C, and the reaction was continued for 6 hours to obtain adhesion promoter 1 with a refractive index of 1.541.
[0024] 100 parts by mass of vinyl phenyl silicone resin with a vinyl content of 4 wt%, 15 parts by mass of vinyl phenyl silicone oil with a viscosity of 500mPa·s, 30 parts by mass of phenyl hydrogen-containing silicone oil with an active hydrogen content of 0.45 wt%, 3 parts by mass of adhesion promoter 1 and 0.02 parts by mass of 1-ethynyl-1-cyclohexanol were mixed unifo...
Embodiment 2
[0026] 21.63g of diphenylsilanediol, 11.14g of 3-(2,3-epoxypropoxy)propyltriethoxysilane, 14.52g of 3-methacryloxypropyltriethoxysilane, 2.92 Add 250g of triethyl borate and 30g of xylene into a 250mL three-neck flask equipped with a thermometer, mechanical stirring, and a condensing reflux tube, stir evenly at room temperature, add 0.25g of tetraisopropyl titanate, and control the reaction temperature at 50°C. After 10 hours, the vacuum degree was controlled at 0.08 MPa and the temperature was 100° C., and the reaction was continued for 4 hours to obtain adhesion promoter 2 with a refractive index of 1.537.
[0027] The adhesion promoter 1 in Example 1 was changed to the adhesion promoter 2, and the dosage was 4 parts by mass. The properties of the samples are shown in Table 1 and Table 2.
Embodiment 3
[0029] 21.63g of diphenylsilanediol, 4.93g of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 18.58g of 3-methacryloxypropyltrimethoxysilane, Add 1.88g of tri-n-propyl borate and 40g of acetone into a 250mL three-necked flask equipped with a thermometer, mechanical stirring and a condensing reflux tube, stir evenly at room temperature, add 0.94g of tetra-n-butyl titanate, and control the reaction temperature at 40°C. React for 8 hours, then control the vacuum degree to 0.06 MPa and the temperature to 110° C., and continue to react for 3 hours to obtain adhesion promoter 3 with a refractive index of 1.539.
[0030] The adhesion promoter 1 in Example 1 was changed to the adhesion promoter 3, and the dosage was 2 parts by mass. The properties of the samples are shown in Table 1 and Table 2.
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