Polyurethane waterproof mildew-resistant paint and preparation method thereof
A technology of polyurethane waterproofing and polyurethane prepolymer, which is applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, reflection/signal coatings, etc., can solve the problems that are not mature enough to reduce flow, increase tensile strength, The effect of high plasticizing efficiency
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Embodiment 1
[0043] First, 45 parts of polyurethane prepolymer, 1 part of hydroxypropyl methacrylate, 4.5 parts of dioctyl terephthalate, 0.7 parts of titanate coupling agent NDZ-201, and 12 parts of rutile titanium dioxide were prepared in parts by weight. , 8 parts of zinc oxide, 0.3 parts of polysiloxane defoamer, 8 parts of talcum powder, 15 parts of mixed solvent (propylene glycol methyl ether and water, the weight ratio is 3:10), antifungal agent (octyl-isothiazoline Ketone) 5 parts, leveling agent polyvinyl butyral 3 parts by weight, for material preparation.
[0044] The production method is to add 1.7 kg of ethanol with a volume concentration of 65-80% per kg of hydroxypropyl methacrylate to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-130°C and the reaction time is 1.3 hours. Then add titanate coupling agent NDZ-201; continue to react for 4 hours; then add dioctyl terephthalate, rutile titanium dioxide, zinc oxide, po...
Embodiment 2
[0046] First, 50 parts of polyurethane prepolymer, 2 parts of hydroxypropyl methacrylate, 5 parts of dioctyl terephthalate, 0.9 parts of titanate coupling agent NDZ-201, and 17 parts of rutile titanium dioxide were prepared in parts by weight. , 9 parts of zinc oxide, 0.4 parts of polysiloxane defoamer, 10 parts of talcum powder, 16 parts of mixed solvent (propylene glycol methyl ether and water, the weight ratio is 3:10), antifungal agent (isothiazolinone fungicide ) 7 parts, antifreeze benzyl alcohol 5 parts, for material preparation.
[0047] The production method is to add 1.7kg of ethanol with a volume concentration of 65-80% per kilogram of hydroxypropyl methacrylate to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-130°C and the reaction time is 1.4 hours. Then add titanate coupling agent NDZ-201; continue to react for 5 hours, then add dioctyl terephthalate, rutile titanium dioxide, zinc oxide, polysiloxane d...
Embodiment 3
[0049] First, 55 parts of polyurethane prepolymer, 3 parts of hydroxypropyl methacrylate, 6.5 parts of dioctyl terephthalate, 1.2 parts of titanate coupling agent NDZ-201, and 20 parts of rutile titanium dioxide were prepared in parts by weight. , 10 parts of zinc oxide, 0.5 parts of polysiloxane defoamer, 13 parts of talcum powder, 18 parts of mixed solvent (propylene glycol methyl ether and water, the weight ratio is 3:10), antifungal agent (octyl-isothiazoline Ketone) 10 parts, anti-settling agent modified hydrogenated castor oil 6 parts, and prepare the materials.
[0050] The production method is to add 1.7kg of ethanol with a volume concentration of 65-80% per kilogram of hydroxypropyl methacrylate to dissolve, and then mix it with polyurethane prepolymer in a reaction kettle. The reaction temperature is 80-130°C and the reaction time is 1.6 hours. Then add titanate coupling agent NDZ-201; continue to react for 6 hours; then add dioctyl terephthalate, rutile titanium...
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