One-component polyurethane waterproof paint and preparation method thereof
A polyurethane waterproof, one-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor durability of hydrophobic effect, low glass transition temperature, easy precipitation, etc. Good color and low surface energy
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Embodiment 1
[0034] This embodiment provides a one-component polyurethane waterproof coating. The raw material formula for preparing the one-component polyurethane waterproof coating includes: aliphatic isocyanate, non-hydrophobic polyether polyol, catalyst, and reactive hydrophobic agent containing hydroxyl.
[0035] This embodiment provides a method for preparing a one-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned raw material formula:
[0036] (1) Mix non-hydrophobic polyether polyol and reactive hydrophobic agent containing hydroxyl group, stir and heat up to 100°C, and dehydrate under vacuum -0.01MPa for 2.3 hours;
[0037] (2) Lower the temperature to 70°C, add aliphatic isocyanate, and react for 4.5 hours;
[0038] (3) Cool down to 35°C, add catalyst, stir for 1.8 hours, cool down to 38°C, fill with inert gas for protection, and discharge to obtain one-component polyurethane waterproof coating.
[0039] The hydro...
Embodiment 2
[0041] This embodiment provides a kind of one-component polyurethane waterproof coating, and the raw material formula for preparing this one-component polyurethane waterproof coating includes:
[0042]
[0043] The aliphatic isocyanate is hexamethylene diisocyanate and isophorone diisocyanate (weight ratio is 2:1), the non-hydrophobic polyether polyol is polyether glycol, and the latent curing agent is The imine type latent curing agent, the reactive hydrophobic agent containing hydroxyl group is triethoxysilanol.
[0044] This embodiment provides a method for preparing a one-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned raw material formula:
[0045] (1) Mix non-hydrophobic polyether polyol and reactive hydrophobic agent containing hydroxyl group, stir and heat up to 120°C, and dehydrate under vacuum -0.01MPa for 3 hours;
[0046] (2) Lower the temperature to 60°C, add aliphatic isocyanate, and react fo...
Embodiment 3
[0050] This embodiment provides a kind of one-component polyurethane waterproof coating, and the raw material formula for preparing this one-component polyurethane waterproof coating includes:
[0051]
[0052] The aliphatic isocyanate is dicyclohexylmethane diisocyanate, the non-hydrophobic polyether polyol is polyether triol, the latent curing agent is an oxazolidine type latent curing agent, and the hydroxyl-containing reactive type The hydrophobic agent is triethoxysilanol and silicon-containing polyether polyol.
[0053] This embodiment provides a method for preparing a one-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned raw material formula:
[0054] (1) Mix non-hydrophobic polyether polyol and reactive hydrophobic agent containing hydroxyl group, stir and heat up to 110°C, and dehydrate under vacuum -0.01MPa for 2 hours;
[0055] (2) Lower the temperature to 100°C, add aliphatic isocyanate, and reac...
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