Modified calcium sulfate whisker and polyurethane composite foam material and preparation process thereof
A technology of calcium sulfate whisker and preparation process, which is applied in application, shoe sole, clothing and other directions, can solve the problems such as not greatly improving the flame retardant performance of polyurethane sole material, not solving the problem of compatibility between polyurethane and modified materials, etc. Effects of uneven stress transfer, improved stability and productivity, improved flame retardancy and mechanical properties
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Embodiment 1
[0040] A kind of preparation technology of modified calcium sulfate whisker / polyurethane composite foaming material, comprises the following steps:
[0041] (1), add 3kg of calcium sulfate whiskers to 30L of ethanol, stir evenly to form a suspension, then add 0.3kg of sodium silicate to the suspension, and add 0.3L of water and 0.3L of ammonia water. Under the condition of 50℃, the magnetic stirring is uniform to form a sol;
[0042] (2), aging the sol obtained in (1) for 24 hours at room temperature to obtain a gel;
[0043] (3), drying the gel obtained in (2) at 60° C. for 4 hours to obtain a xerogel, which is ground to obtain silica-coated calcium sulfate whiskers;
[0044] (4), add 0.03kg of silane coupling agent A171 to methanol solvent to prepare a dilute solution with a mass fraction of 0.5%, adjust the pH of the dilute solution to 3.5 with glacial acetic acid, stir magnetically for 1 hour, and then add 3kg of (3) obtained Calcium sulfate whiskers coated with silica w...
Embodiment 2
[0050] A kind of preparation technology of modified calcium sulfate whisker / polyurethane composite foaming material, comprises the following steps:
[0051] (1), add 3kg of calcium sulfate whiskers to 60L of ethanol, stir evenly to form a suspension, then add 1.8kg of sodium silicate to the suspension, and add 1.8L of water and 1.2L of ammonia water, at a temperature of 70 Under the condition of ℃, stir magnetically evenly to form a sol;
[0052] (2), aging the sol obtained in (1) for 36 hours at room temperature to obtain a gel;
[0053] (3), drying the gel obtained in (2) at 80° C. for 8 hours to obtain a xerogel, which is ground to obtain silica-coated calcium sulfate whiskers;
[0054] (4), 0.3kg of silane coupling agent A172 was added with ethanol solvent to prepare a dilute solution with a mass fraction of 1%, the pH of the dilute solution was adjusted to 5.5 with glacial acetic acid, magnetically stirred for 2h, and then 3kg of (3) was added Silica-coated calcium sulf...
Embodiment 3
[0060] A kind of preparation technology of modified calcium sulfate whisker / polyurethane composite foaming material, comprises the following steps:
[0061] (1), add 3kg of calcium sulfate whiskers to 45L of ethanol, stir evenly to form a suspension, then add 0.9kg of sodium silicate to the suspension, and add 0.9L of water and 0.675L of ammonia water, at a temperature of 60 Under the condition of ℃, stir magnetically evenly to form a sol;
[0062] (2), aging the sol obtained in (1) for 30 h at room temperature to obtain a gel;
[0063] (3), drying the gel obtained in (2) at 70° C. for 6 hours to obtain a xerogel, which is ground to obtain silica-coated calcium sulfate whiskers;
[0064] (4) Add 0.165kg of silane coupling agent A151 to a propanol solvent to prepare a dilute solution with a mass fraction of 0.75%, adjust the pH of the dilute solution to 4.5 with glacial acetic acid, stir magnetically for 1.5h, and then add 3kg of (3) The obtained silica-coated calcium sulfate...
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