Waterborne polyurethane dispersion, coating composition and application thereof
A technology of water-based polyurethane and dispersion, which is applied in polyurea/polyurethane coatings, coatings, textiles and papermaking, and can solve the problems of waterproof performance, moisture permeability and water washing resistance, moisture permeability and waterproof and water washing resistance Performance can not be both problems, to achieve the effect of improving moisture permeability
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[0097] Add 161g of monopentaerythritol and 606g of phthalic anhydride into a four-necked bottle, then add 839g of glycidyl tertiary carbonate dropwise at 150°C, and react for 5 hours to obtain a polyfunctional polyester polyol (C). The average molecular weight is about 1500 g / mole and the solids content is 98% by weight.
[0098] Manufacture of Waterborne Polyurethane Dispersions
Embodiment 1
[0100]Here, the amount of each reaction component used is based on the solid content of the aqueous polyurethane dispersion being 100% by weight. Under nitrogen, the polyester diol (B1) of 19.20 weight percent (manufactured by Changxing Material Industry Co., Ltd., model is 5650-1000, and molecular weight is 1000), the polyether diol (B2) of 30.98 weight percent (polytetramethylene ether glycol (PTMEG) manufactured by Dalian Chemical Industry Co., Ltd., the model is 2000, and the molecular weight is about 2000), 3.05 weight percent of polyfunctional polyester polyol (C), 5.20 weight percent of Sulfonate dibasic alcohol (D) (manufactured by G Ntechnology company, model is GS-7Q, and molecular weight is 420 g / mol) and the side chain of 13.31 weight percent has the dibasic alcohol compound (E ) (manufactured by Perstorp Company, model is Ymer N120, and the molecular weight is 1000 g / mol) after mixing, heated to 120° C., and kept at 120° C. for 2 hours to remove water.
[0101] T...
Embodiment 2 to 8 and comparative example 1 to 5
[0105] Embodiments 2 to 8 and Comparative Examples 1 to 5 are carried out in the same manner as in Example 1, except that polyisocyanate (A), diol compound (B), polyfunctional polyester polyol (C), sulfonate The usage-amount of salt diol (D), the diol compound (E) which has a polyethylene oxide group in a side chain, and a polyamine compound (F). The specific conditions about Examples 2 to 8 and Comparative Examples 1 to 5 are shown in Table 1.
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