Preparation method of waterborne polyurethane resin
A water-based polyurethane and resin technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve problems such as air pollution and huge, and achieve the effects of increased tensile strength, low cost, and good water resistance
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Embodiment 1
[0016] Under nitrogen protection, 0.1 part by weight of graphene oxide, 200 parts of polyneopentyl adipate, 40 parts of dimethylol propionic acid, 40 parts of N-methylpyrrolidone, 500 parts of deionized water, Mix and put in the reaction kettle, heat to 40°C, stir for 1H, slowly drop in 100 parts of diisocyanate, drop for 2H, heat up to 90°C, keep warm for 6H, cool down to 40°C, add triethylamine for neutralization, react for 1H, Add 30 parts of acetone, add 100 parts of ice cubes, quickly cool down to 10°C, add 30 parts of ketimine, stir at high speed for 4 hours, remove acetone under reduced pressure, and obtain a translucent aqueous polyurethane dispersion with fluorescence. 10% vitamin C solution was added dropwise to carry out in-situ reduction reaction for 6 hours to obtain graphene water-based polyurethane nanocomposite latex resin.
[0017] The hardness (Shore D) of the resin measured by experiment is 85, put the resin into 10% liquid caustic soda, 100 ℃, observe for o...
Embodiment 2
[0019] Under nitrogen protection, 20 parts by weight of graphene oxide, 230 parts of polyneopentyl adipate, 50 parts of dimethylol propionic acid, 70 parts of N-methylpyrrolidone, 700 parts of deionized water, Mix and put into the reaction kettle, heat to 70°C, stir for 1H, slowly drop in 120 parts of diisocyanate for 3H, heat up to 100°C, keep warm for 6H, cool down to 50°C, add triethylamine for neutralization, react for 1H, Add 50 parts of acetone, add 200 parts of ice cubes, quickly cool down to 20°C, add 70 parts of ketimine, stir at high speed for 8 hours, remove acetone under reduced pressure, and obtain a translucent aqueous polyurethane dispersion with fluorescence. 20% vitamin C solution was added dropwise to carry out in-situ reduction reaction for 8 hours to obtain graphene water-based polyurethane nanocomposite latex resin.
[0020] The hardness (Shore D) of the resin measured by the experiment is 90, put the resin into 10% liquid caustic soda, 100 ℃, observe for ...
Embodiment 3
[0022] Under nitrogen protection, 15 parts by weight of graphene oxide, 215 parts of polyneopentyl adipate, 45 parts of dimethylol propionic acid, 60 parts of N-methylpyrrolidone, 600 parts of deionized water, Mix and put into the reaction kettle, heat up to 60°C, stir for 1H, slowly drop in 110 parts of diisocyanate for 2.5H, heat up to 95°C, keep warm for 6H, cool down to 45°C, add triethylamine for neutralization, and react for 1H , add 40 parts of acetone, add 150 parts of ice cubes, rapidly cool down to 15°C, add 50 parts of ketimine, stir at high speed for 7 hours, remove acetone under reduced pressure, and obtain a translucent aqueous polyurethane dispersion with fluorescence. 20% vitamin C solution was added dropwise to carry out in-situ reduction reaction for 7 hours to obtain graphene water-based polyurethane nanocomposite latex resin.
[0023] The hardness (Shore D) of the resin measured by experiment is 88, put the resin into 10% liquid caustic soda, 100 ℃, observe...
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