Cationic waterborne polyurethane/organic montmorillonoid composite resin and preparation method thereof
A technology of water-based polyurethane and organic montmorillonite, which is applied in the field of chemical products to achieve the effect of improving mechanical properties
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Embodiment 1
[0028] A cationic water-based polyurethane / organic montmorillonite composite resin is formed by mixing the following components by weight:
[0029] Cationic waterborne polyurethane / montmorillonite prepolymer 25 parts
[0030] 60 parts of water.
[0031] The cationic waterborne polyurethane / montmorillonite prepolymer is prepared from active organic montmorillonite, compounds containing isocyanate groups and compounds containing hydroxyl groups.
[0032] Montmorillonite (MMT) is a silicate clay mineral with layered structure and layered crystallization. Montmorillonite crystal particles are fine, usually in the form of sheet-like aggregates, about 0.2 to 1.0 microns. The layers of montmorillonite contain a lot of Na + 、K + , Ca 2+ , Mg 2+ It has strong adsorption capacity and ion exchange capacity. These ions can carry out ion exchange reaction with organic compounds containing quaternary ammonium salts. The montmorillonite after the ion exchange reaction is an organic mo...
Embodiment 2
[0042] A cationic water-based polyurethane / organic montmorillonite composite resin is formed by mixing the following components by weight:
[0043] Cationic waterborne polyurethane / montmorillonite prepolymer 32 parts
[0044] 62 parts of water.
[0045] Others are basically the same as those in Embodiment 1, and will not be repeated here.
Embodiment 3
[0047] A cationic water-based polyurethane / organic montmorillonite composite resin is formed by mixing the following components by weight:
[0048] Cationic waterborne polyurethane / montmorillonite prepolymer 40 parts
[0049] 75 parts of water.
[0050] Others are basically the same as those in Embodiment 1, and will not be repeated here.
[0051] Applied to specific components, the specific implementation results are as follows:
[0052] (1) Get 15g polytetrahydrofuran ether glycol (Mn=1000g·mol -1 ), 3g castor oil and 0.5g active organic montmorillonite were added to a 250mL three-necked flask, then heated to 100°C and stirred for 2h under the action of ultrasonic waves, then heated to 105°C, and degassed with a vacuum pump for 1h. After degassing, lower the temperature to 60°C, add 20.2g of toluene diisocyanate, then raise the temperature to 80°C and stir for 2h, then cool down to 70°C, add 2.8g of N-methyldiethanolamine, then raise the temperature to 80°C for 2h After ...
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