Waterborne extinction polyurethane resin and preparation method thereof
A polyurethane resin, water-based technology, applied in the field of water-based polyurethane resin, can solve the problems of poor scratch resistance, loss of matting effect, and inability to achieve the use effect, and achieve good wear resistance and scratch resistance, not easy to deform, and high extinction. Effect
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Example Embodiment
[0034] Example 1
[0035] Put 200 parts of polyoxypropylene glycol into the reactor, vacuum dehydration at 100℃ for 1h, then add 10 parts of dimethylolpropionic acid, 20 parts of N,N-dimethylformamide, and 8 parts Then add 70 parts of isophorone diisocyanate and 0.3 parts of stannous octoate, and react at 85°C for 4h. Then add 7.5 parts of triethylamine to form a salt to neutralize for 20-30 minutes, add 670 parts of water while stirring, and after complete emulsification, add 4 parts of ethylenediamine and 4 parts of diethylenetriamine for chain extension. Finally, 1.5% polyurethane associative thickener was added for thickening, and a water-based matting polyurethane resin with a viscosity of 4300cps / 25℃ was obtained.
Example Embodiment
[0036] Example 2
[0037] Put 180 parts of polytetrahydrofuran glycol into the reaction kettle, vacuum dehydration at 100℃ for 1h, then add 8 parts of dimethylolpropionic acid, 50 parts of N,N-dimethylformamide, and 10 parts of Neopentyl glycol, then add 70 parts of isophorone diisocyanate, 20 parts of dicyclohexylmethane diisocyanate (HMDI) and 0.6 parts of stannous octoate, and react at 90°C for 3h. Then add 6 parts of triethylamine to form a salt for neutralization for 20-30 minutes, add 650 parts of water while stirring, and after complete emulsification, add 3 parts of ethylenediamine and 6 parts of diethylenetriamine for chain extension. Finally, 0.5% polyurethane associative thickener was added for thickening, and a water-based matting polyurethane resin with a viscosity of 1250cps / 25℃ was obtained.
Example Embodiment
[0038] Example 3
[0039] Put 220 parts of poly-neopentyl adipate diol into the reaction kettle, vacuum dehydration at 100°C for 1 hour, then add 8 parts of dimethylol butyric acid and 20 parts of N,N-dimethyl Formamide and 20 parts of acetone, then 4 parts of ethylene glycol, 70 parts of dicyclohexylmethane diisocyanate (HMDI) and 0.5 parts of dibutyltin laurate, and react at 75°C for 5 hours. Then add 6 parts of triethylamine to form a salt for neutralization for 20-30 minutes, add 640 parts of water while stirring, and after complete emulsification, add 6 parts of ethylenediamine and 3 parts of diethylenetriamine for chain extension. Finally, 1% polyurethane associative thickener was added for thickening, and a water-based matting polyurethane resin with a viscosity of 2808cps / 25℃ was obtained.
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