Preparation method of amino silane modified urethane acrylate resin
A technology of urethane acrylate and aminosilane, which is applied in the field of preparation of silicone coupling agent modified urethane acrylate resin, can solve the problems of insufficient heat resistance and water resistance, achieve good stability, simple and feasible experiment, and improved The effect of smooth sexual process
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Embodiment 1
[0026] (1) Add 7.02g of γ-aminopropyltriethoxysilane (KH550) into a four-necked flask, connect a thermometer and a stirring paddle, pass high-purity nitrogen gas for 20 minutes, and heat up to 60°C; 5g of γ-glycidyl etheroxypropyltrimethoxysilane was dropped, and then kept at 60°C for 3 hours to obtain the modified silane coupling agent secondary aminosilane.
[0027] (2) Add 100g of polyether polyol (N-220) and 50g of hydroxyacrylate resin (hydroxyl value: 40.5mgKOH / g) into a four-neck flask, heat up to 60°C, mix for half an hour and then heat up to 110°C , vacuumed at -0.1Mpa vacuum for 2.5 hours to remove unreacted monomers (mainly butyl acrylate and methyl methacrylate monomers) and residual moisture in the mixture until there was no distillate.
[0028] (3) Then cool down to 50°C, release the vacuum; add 30.62g of diphenylmethane diisocyanate (MDI) after 30 minutes of high-purity nitrogen gas, heat up to 80°C after the end of the exothermic peak, and degas after 3 hours o...
Embodiment 2
[0031] (1) Add 7.02g of γ-aminopropyltriethoxysilane (KH550) into a four-necked flask, connect a thermometer and a stirring paddle, pass high-purity nitrogen gas for 20 minutes, and heat up to 40°C; within 60 minutes, 5g of γ-glycidyl etheroxypropyltrimethoxysilane was dropped, and then kept at 40°C for 3 hours to obtain the modified silane coupling agent secondary aminosilane.
[0032] (2) Add 150g of polyether polyol (N-220) and 50g of hydroxyacrylate resin (hydroxyl value 40.5mgKOH / g) into a four-neck flask, heat up to 60°C, mix for half an hour and then heat up to 90°C , vacuumed at -0.1Mpa vacuum for 2.5 hours to remove unreacted monomers (mainly butyl acrylate and methyl methacrylate monomers) and residual moisture in the mixture until there was no distillate.
[0033] (3) Then cool down to 20°C and release the vacuum; add 30.76g of toluene diisocyanate (TDI) after 30 minutes of high-purity nitrogen gas, heat up to 70°C after the end of the exothermic peak, degas and dis...
Embodiment 3
[0036] (1) Add 4.5g of γ-aminopropyltriethoxysilane (KH550) into a four-necked flask, connect a thermometer and a stirring paddle, pass high-purity nitrogen gas for 20 minutes, and heat up to 50°C; within 60 minutes, 5g of γ-glycidyl etheroxypropyltrimethoxysilane was dropped, and then kept at 50°C for 2 hours to obtain the modified silane coupling agent secondary aminosilane.
[0037] (2) Add 200g of polyether polyol (N-220) and 50g of hydroxyacrylate resin (hydroxyl value 40.5mgKOH / g) into a four-neck flask, heat up to 60°C, mix for half an hour and then heat up to 110°C , vacuumed at -0.1Mpa vacuum for 2.5 hours to remove unreacted monomers (mainly butyl acrylate and methyl methacrylate monomers) and residual moisture in the mixture until there was no distillate.
[0038] (3) Then cool down to 30°C, release the vacuum; add 41.08g of toluene diisocyanate (TDI) after 30 minutes of high-purity nitrogen gas, heat up to 60°C after the end of the exothermic peak, degas and discharg...
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