Efficient antibacterial waterborne polyurethane floor coating and preparation method thereof
A technology for water-based polyurethane and floor coatings, applied in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve the problems of poor compatibility between antibacterial agents and water, difficulty and so on
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Embodiment 1
[0025] Preparation of component A: 25 parts by weight of polyethylene glycol ether and 25 parts by weight of 1,6-hexamethylene diisocyanate (HDI) are added to a three-necked flask equipped with a thermometer, a stirring device and a reflux condenser, and the Under protection, heat to 90°C for 2 hours, then add 5 parts by weight of dimethylolpropionic acid DMPA to react for 1 hour, finally add 7 parts by weight of chain extender diethyltoluenediamine, react at 60°C for 4 hours, and cool to 30°C Discharge, neutralize the prepolymer with triethylamine (TEA) to pH = 7, then add 2 parts by weight of water-based epoxy-coated silver-loaded (Ag / EP-PEG) antibacterial agent, 30 parts by weight of deionized water, high-speed Emulsified for 30 minutes to obtain a white emulsion.
[0026] Preparation of component B: add 10 parts by weight of silicon micropowder, 8 parts by weight of titanium dioxide, 8 parts by weight of talcum powder, 30 parts by weight of polyethylene glycol ether, 25 pa...
Embodiment 2
[0029] Preparation of component A: 22 parts by weight of polypropylene glycol ether and 28 parts by weight of 1,6-hexamethylene diisocyanate (HDI) were added to a three-necked flask equipped with a thermometer, a stirring device and a reflux condenser, under nitrogen protection , heated to 90°C for 2 hours, then added 7 parts by weight of dimethylolpropionic acid DMPA to react for 1 hour, and finally added 4 parts by weight of chain extender dimethylmercaptotoluenediamine, reacted at 60°C for 3 hours, cooled to 30°C and discharged , neutralize the prepolymer with triethylamine (TEA) to pH = 7, then add 1 weight part of water-based epoxy-coated silver (Ag / EP-PEG) antibacterial agent, 30 weight parts of deionized water, and emulsify at high speed for 10 minutes A white emulsion was obtained.
[0030] Preparation of component B: add 8 parts by weight of silicon micropowder, 10 parts by weight of titanium dioxide, 10 parts by weight of talcum powder, 25 parts by weight of polypent...
Embodiment 3
[0033] Preparation of component A: 30 parts by weight of polycarbonate diol and 26 parts by weight of 1,6-hexamethylene diisocyanate (HDI) are added to a three-necked flask equipped with a thermometer, a stirring device and a reflux condenser. Under nitrogen protection, heat to 80°C for 3 hours, then add 5 parts by weight of dimethylolpropionic acid DMPA for 1 hour, finally add 5 parts by weight of chain extender 1,4-butanediol, react at 60°C for 5 hours, and cool to Discharge at 25°C, neutralize the prepolymer with triethylamine (TEA) to pH = 7, then add 1 part by weight of water-based epoxy-coated silver (Ag / EP-PEG) antibacterial agent, and 30 parts by weight of deionized water , high-speed emulsification for 30 minutes to obtain a white emulsion.
[0034] Preparation of component B: add 10 parts by weight of silicon micropowder, 8 parts by weight of titanium dioxide, 10 parts by weight of talcum powder, 25 parts by weight of polytetrahydrofuran ether glycol, 30 parts by wei...
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