Flame-retardant polyurethane water dispersion and its preparing method
A water-based dispersion and polyurethane technology, applied in the field of dispersion and its preparation, can solve problems such as flame-retardant polyurethane water-based dispersions that have not yet been found, and achieve the effect of avoiding influence
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[0028] Example 1
[0029] Raw materials
[0030] In a reactor equipped with a stirring paddle, a thermometer and a condenser, add toluene diisocyanate, phosphorus antimony chloride tertiary phosphate polyether diol with a hydroxyl value of 50 mgKOH / g, dimethylol propionic acid, and heat to The temperature is kept at 60°C for 0.5 hours, and then the temperature is raised to 75°C to react until the -NCO content reaches the specified value. The temperature is reduced to 30-60°C, and triethylamine is added for neutralization to prepare an anionic polyurethane prepolymer terminated with -NCO groups. The above-mentioned prepolymer is emulsified with deionized water in a high-speed emulsification equipment, and ethylenediamine is added for stirring for 20-30 minutes to obtain an anionic polyurethane aqueous dispersion with flame retardant function. In the formula of the present invention, the NCO / OH (molar ratio) is 1.2, the mass content of -COOH is 1.5%, and the neutralization...
Example Embodiment
[0031] Example 2
[0032] Raw materials
[0033]Add isophorone diisocyanate, phosphate ester polyether diol, dibromoneopentyl glycol, tartaric acid to a reactor equipped with stirring blade, thermometer and condenser, heat up to 60°C, and react with heat preservation for 0.5 hours , And then heated to 80 ℃ to react until the -NCO content reaches the specified value. The temperature is lowered to 30-40°C, and NaOH is added for neutralization to prepare an anionic polyurethane prepolymer terminated with -NCO groups. The above-mentioned prepolymer is emulsified with deionized water in a high-speed emulsification equipment, and hexamethylene diamine is added for stirring for 20-30 minutes to obtain an anionic polyurethane aqueous dispersion with flame retardant function. In the formula of the present invention, the NCO / OH (molar ratio) is 3.0, the mass content of -COOH is 3.0%, and the neutralization rate is 70%. The flame-retardant polyurethane aqueous dispersion prepared b...
Example Embodiment
[0034] Example 3
[0035] Raw materials
[0036] Add hexamethylene diisocyanate, phosphorous antimony chlorotribasic phosphate polyether diol, polyoxypropylene diol, and methyldiethanolamine into a reactor equipped with stirring blade, thermometer and condenser, and heat to The reaction was kept at 60°C for 1 hour, then the temperature was raised to 90°C to react until the -NCO content reached the specified value, and then butanediol was added for chain extension. The temperature is lowered to 30-40°C, and acetic acid is added for neutralization to obtain a cationic flame retardant polyurethane prepolymer. The above-mentioned prepolymer is emulsified with deionized water in a high-speed emulsification equipment to obtain a cationic water-based polyurethane dispersion with flame retardant function. In the formula of the present invention, the NCO / OH (molar ratio) is 2.0, the mass content of -COOH is 2.0%, and the neutralization rate is 100%. The flame-retardant polyuretha...
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