High solid content PVC glove powder-free aqueous coating and its preparation method and use method
A high-solid content, water-based coating technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as allergies, powder staining, and low active ingredients, and reduce unit consumption and transportation costs. Large multiples, easy to dissolve and fall off
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Embodiment 2
[0027] Prepare 200 grams of redispersible polyurethane resin:
[0028] 1) Preparation of waterborne polyurethane resin prepolymer
[0029] First weigh 100 grams of polyadipate 1,4-butylene glycol ester polyol (2 functionality, molecular weight 1000), 32 grams of polypropylene glycol polyether (2 functionality, molecular weight 2000), sulfonate Modified polyester polyol BY-3305 6.5g, acetone 7g, vacuumize at 100-110°C to remove water; then cool down to below 50°C, add 47.95g of dicyclohexylmethane diisocyanate (HMDI), 10.09g of HDI , butanone 8 grams, heated to 90 ° C for 1-2 hours. Then lower the temperature to below 55°C, add 4.6 grams of dimethylolbutyric acid (DMBA), 0.6 grams of trimethylolpropane, 0.8 grams of neopentyl glycol, and 10 grams of acetone into the reactor, and heat up to 90°C for 6 hours , lower the temperature to below 30°C, add 20 grams of acetone to reduce the viscosity,
[0030] 2) neutralize
[0031] Add 3.3 grams of dimethylethanolamine diluted with...
Embodiment 3
[0039] Prepare 200 grams of redispersible polyurethane resin:
[0040] 1) Preparation of waterborne polyurethane resin prepolymer
[0041] First weigh 120 grams of polyadipate 1,4-butylene glycol ester polyol (2 functionality, molecular weight 1000), 7 grams of sulfonate modified polyester polyol BY-3305, and 7 grams of acetone , 100-110 ° C vacuum to remove water; then lower the temperature to below 50 ° C, add dicyclohexylmethane diisocyanate (HMDI) 26.2 grams, isophorone diisocyanate (IPDI) 24.4 grams, HDI 10.9 grams, butanone 8 grams, heated to 90 ° C for 1-2 hours. Then lower the temperature to below 55°C, add 2.5 grams of dimethylol propionic acid (DMPA), 2.5 grams of dimethylol butyric acid (DMBA), 0.6 grams of trimethylolpropane, and 0.8 grams of neopentyl glycol in the reactor , 10 grams of acetone, heated up to 90 ° C for 6 hours, cooled to below 30 ° C, added 20 grams of acetone to reduce the viscosity,
[0042] 2) neutralize
[0043] Add 2.4 grams of triethylam...
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