Preparation of polytitanium borosiloxane and modification method of phenolic resin
A technology of polytitanium borosiloxane and polyborosiloxane, which is applied in the direction of aldehyde/ketone condensation polymer adhesives, adhesive types, adhesives, etc. Diphenol is difficult to react, raw materials are single, etc., to achieve the effect of improving bond strength and thermal stability, low equipment requirements, improving strength and high temperature resistance
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Embodiment 1
[0026] Preparation of polytitanium borosiloxane: polyborosiloxane (prepared from phenyltrimethoxysilane and boric acid at a molar ratio of 1:1, reacting at 150°C for 3 hours under nitrogen atmosphere, and removing the solvent) 1 part (dissolved in 10 parts of tetrahydrofuran), 0.2 parts of chelate containing butyl titanate (dissolved in 10 parts of tetrahydrofuran, the chelate is formed by 0.2 parts of butyl titanate and equimolar acetylacetone), novolac ( The phenol and formalin solution was prepared under the condition of oxalic acid as a catalyst, wherein the molar ratio of phenol and formaldehyde was 1:0.9) 1 part (dissolved in 10 parts tetrahydrofuran), and the three were mixed together, under nitrogen atmosphere for 2 hours Gradually raise the temperature from room temperature to 60° C., react for 5 hours, and react under reduced pressure with a water pump for 0.5 to 1 hour to obtain polytitanoborosiloxane.
Embodiment 2
[0028] Preparation of polytitanium borosiloxane: polyborosiloxane (prepared from phenyltrimethoxysilane and boric acid at a molar ratio of 1:1, reacting at 150°C for 3 hours under nitrogen atmosphere, and removing the solvent) 1 part (dissolved in 10 parts of tetrahydrofuran), 0.4 parts of chelate containing butyl titanate (dissolved in 10 parts of tetrahydrofuran, the chelate is formed by 0.4 parts of butyl titanate and equimolar acetylacetone), novolac ( The phenol and formalin solution was prepared under the condition of oxalic acid as a catalyst, wherein the molar ratio of phenol and formaldehyde was 1:0.9) 1 part (dissolved in 10 parts tetrahydrofuran), and the three were mixed together, under nitrogen atmosphere for 2 hours Gradually raise the temperature from room temperature to 60° C., react for 5 hours, and react under reduced pressure with a water pump for 0.5 to 1 hour to obtain polytitanoborosiloxane.
Embodiment 3
[0030] Preparation of polytitanium borosiloxane: polyborosiloxane (prepared from phenyltrimethoxysilane and boric acid at a molar ratio of 1:1, reacting at 150°C for 3 hours under nitrogen atmosphere, and removing the solvent) 1 part (dissolved in 10 parts of tetrahydrofuran), 0.6 parts of chelate containing butyl titanate (dissolved in 10 parts of tetrahydrofuran, the chelate is formed by 0.6 parts of butyl titanate and equimolar acetylacetone), novolac ( The phenol and formalin solution was prepared under the condition of oxalic acid as a catalyst, wherein the molar ratio of phenol and formaldehyde was 1:0.9) 1 part (dissolved in 10 parts tetrahydrofuran), and the three were mixed together, under nitrogen atmosphere for 2 hours Gradually raise the temperature from room temperature to 60° C., react for 5 hours, and react under reduced pressure with a water pump for 0.5 to 1 hour to obtain polytitanoborosiloxane.
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