Water dispersion of hydrophilic polyurethane resin
A technology of polyurethane resin and dispersion, applied in the direction of polyurea/polyurethane coating, coating, transportation and packaging, etc., can solve the problems of unsuitable and non-adhesive properties, and achieve the effect of improving anti-coagulation
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Embodiment 1
[0071] Embodiment 1 (according to the present invention)
[0072] Aqueous formulation of polyurethane resin:
[0073] 1600 g of adipate-hexanediol-neopentyl glycol mixed ester with hydroxyl number 56, 110 g of polyoxypropylene diol initiated on bisphenol A with hydroxyl number 210 and 107.5 g of monofunctional, The ethylene oxide-rich polyether (78% by weight ethylene oxide) was dehydrated at 120° C. and 15 mbar for 1 hour. First, 88.5 g of hexane-1,6-diol and 67.5 g of butane-1,4-diol are added at 80°C. Once the mixture was uniformly mixed, 777 grams of 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (isophorone diisocyanate) was added. The mixture was stirred at 80 to 90° C. until a constant isocyanate content of 2.98 to 2.60% was reached. The reaction product was diluted with 4125 grams of acetone and cooled to 40°C.
[0074] Add 63 g of 1-amino-3,3,5-trimethyl-5-aminomethylcyclohexane (isophorone diamine) and 78 g of N-(2-aminoethyl)- A solution of 2-aminoe...
Embodiment 2
[0078]Embodiment 2 (according to the present invention)
[0079] Aqueous formulation of polyurethane resin:
[0080] 1600 g of adipate-hexanediol-neopentyl glycol mixed ester with hydroxyl number 56, 110 g of polyoxypropylene diol initiated on bisphenol A with hydroxyl number 210 and 107.5 g of monofunctional, The ethylene oxide-rich polyether (78% by weight ethylene oxide) was dehydrated at 120° C. and 15 mbar for 1 hour. First, 88.5 g of hexane-1,6-diol and 67.5 g of butane-1,4-diol are added at 80°C. Once the mixture was uniformly mixed, 917 grams of 4,4'-diisocyanatodicyclohexylmethane was added. The mixture is stirred at 80 to 90° C. until a constant isocyanate content of 2.80% to 2.50% is reached. The reaction product was diluted with 4350 g of acetone and cooled to 40°C.
[0081] A solution of 22 grams of ethylenediamine and 78 grams of N-(2-aminoethyl)-2-aminoethanesulfonic acid sodium salt in 450 grams of deionized water was added over 5 minutes. Five minutes aft...
Embodiment 3
[0085] Embodiment 3 (according to the present invention)
[0086] Aqueous formulation of polyurethane resin:
[0087] 550 grams of polyoxypropylene diol initiated on bisphenol A with a hydroxyl number of 210 and 45 grams of a monofunctional, ethylene oxide-rich polyether (78 wt% ethylene oxide) with a hydroxyl number of 26 were Dehydration at 15 mbar for 1 hour. First, 88.5 g of hexane-1,6-diol and 67.5 g of butane-1,4-diol are added at 80°C. Once the mixture was uniformly mixed, 799 grams of 4,4'-diisocyanatodicyclohexylmethane was added. The mixture is stirred at 80 to 90° C. until a constant isocyanate content of 2.90 to 2.75% is reached. The reaction product was diluted with 2350 g of acetone and cooled to 40°C.
[0088] Add 34.8 g of 1-amino-3,3,5-trimethyl-5-aminomethylcyclohexane (isophorone diamine) and 43 g of N-(2-aminoethyl)- A solution of 2-aminoethanesulfonic acid sodium salt in 400 g of deionized water. Five minutes after the addition of the amine solution ...
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