Method for preparing self-cleaning coating for TPU conveyor belt
A self-cleaning coating and conveyor belt technology, applied in the field of materials, can solve the problems of water resistance, solvent resistance, chemical resistance, poor mechanical strength, hot stickiness and cold brittleness, and solvent resistance, and achieves stable coating, The effect of uniform adhesion and high hardness
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Embodiment 1
[0022] Embodiment 1: the preparation of polyurethane acrylate, its operational route is as follows:
[0023]
[0024] Step 1: Put 13.875g of isofulone diisocyanate, 25g of polytetrahydrofuran, 0.0625g of dibutyltin dilaurate, and 25g of methyl ethyl ketone into a 250ml reaction bottle, heat, stir and reflux in a water bath at 85°C for 5 hours to obtain isocyanate-terminated polyurethane .
[0025] Step 2: Add 3.71 g of hydroxypropyl acrylate and 0.0375 g of 4-methoxyphenol to the above product, heat, stir and reflux in a water bath at 60° C. for 3 hours to obtain acrylate-terminated polyurethane.
[0026] Step 3: Take the polyurethane obtained in step 2, add 0.05g of specially treated nano-titanium dioxide powder, 14.2g of hexanediol diacrylate, and 1.42g of 2-hydroxy-2-methyl-1-phenyl-1-acetone The coating solution was coated on the surface of TPU, and irradiated for 90s under a 1000W ultraviolet lamp to obtain a film with photocatalytic self-cleaning properties.
Embodiment 2
[0028] Step 1: Put 12.5 g of diphenylmethane diisocyanate, 0.05 g of 0.775 dibutyltin ethylene glycol, and 23 g of acetone into a 250 ml reaction bottle, heat, stir and reflux in a water bath at 85° C. for 5 hours to obtain isocyanate group-terminated polyurethane.
[0029] Step 2: Add 3g of trimethylolpropyl triacrylate and 0.03g of 4-methoxyphenol to the above product, heat, stir and reflux in a water bath at 60°C for 3 hours to obtain acrylate group-terminated polyurethane.
[0030] Step 3: Take the polyurethane obtained in step 2, add 0.046g of specially treated nano-titanium dioxide powder, 13.2g of triacrylic acid-(propyl)trimethyl ester, 1.32g of 2-hydroxy-2-methyl-1-phenyl-1 - Coating solution made of acetone is coated on the surface of TPU, and irradiated for 90s under a 1000W ultraviolet lamp to obtain a film with photocatalytic self-cleaning properties.
Embodiment 3
[0032] Step 1: put 9.84g of dicyclohexylmethane diisocyanate, 25g of polycarbonate diol, 0.0625g of dibutyltin dilaurate, and 25g of xylene into a 250ml reaction bottle, heat, stir and reflux in a water bath at 85°C for 5 hours to obtain Isocyanate-terminated polyurethane.
[0033] Step 2: Add 3.31 g of hydroxyethyl acrylate and 0.0375 g of 4-methoxyphenol to the above product, heat, stir and reflux in a water bath at 60° C. for 3 hours to obtain acrylate group-terminated polyurethane.
[0034] Step 3: Take the polyurethane obtained in step 2, add 0.05g of specially treated nano-titanium dioxide powder, 14.2g of hexanediol diacrylate, and 1.42g of 2-hydroxy-2-methyl-1-phenyl-1-acetone The coating solution was coated on the surface of TPU, and irradiated for 90s under a 1000W ultraviolet lamp to obtain a film with photocatalytic self-cleaning properties.
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