Manufacturing method of powdery thermoplastic polyurethane urea resin
A technology of polyurethane urea and manufacturing method, applied in the direction of coating, etc., can solve the problems of poor melt moldability, blooming, and difficulty in controlling the molecular weight of resin, and achieve the effects of excellent mechanical properties and excellent melt moldability.
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[0269] Hereinafter, examples of the present invention will be described, but the present invention is not limited to these examples.
[0270] [Preparation example 1 (preparation of dispersant solution)]
[0271] Add 762 grams of adipic acid, 49 grams of maleic anhydride and 386 grams of ethylene glycol into a reaction vessel with a capacity of 2 liters that is equipped with a stirrer, a thermometer, a distillation tower and a nitrogen gas introduction pipe, and nitrogen gas is fed while Stir at 150°C under normal pressure to carry out esterification reaction.
[0272] When no condensation water was confirmed, 0.1 g of tetrabutyl titanate was added, and the pressure in the reaction system was slowly reduced to 0.07 kPa. At the same time, the temperature was slowly raised to 190° C. to continue the reaction, thereby obtaining polyester. The obtained polyester had a number average molecular weight of 2,000 and an iodine value of 12.7 g I / 100 g.
[0273] Then, 74 grams of the ab...
Embodiment I-1
[0277] (1) The first process
[0278] 756.9 grams of polyester diol (EA-2000) with a number average molecular weight of 2,000 obtained from ethylene glycol and adipic acid, and 133.6 grams of poly Ester diol (HoP-1500), 7.4 g of dispersant solution (1), and 818.2 g of isooctane "Kyowa Gel C-800" (manufactured by Kyowa Hakka Chemical Co., Ltd.) as a non-aqueous dispersion medium are placed in the device Stir for one hour at 90~95°C in a reaction vessel with a capacity of 3L, equipped with a stirrer, a thermometer, a distillation column, and a nitrogen gas inlet pipe, thereby making the polymer polyol (a) (EA-2000 and HoP-1500) Disperse in isooctane to prepare non-aqueous dispersion.
[0279] (2) The second process
[0280] 102.2 g of hexamethylene diisocyanate (HDI) as organic polyisocyanate (b) and 0.050 g of bismuth-based catalyst "NEOSTANN U-600" (Nitto Kasei Co., Ltd.), react the polymer polyol (a) with HDI at 90~95°C for 3 hours, and prepare the dispersion liquid of the...
Embodiment I-2-I-15
[0295] Through the following steps 1 to 4, various powdery thermoplastic polyurethane urea resins are prepared.
[0296] (1) The first process
[0297] According to the formula shown in the following table 1, except that the polymer polyol (a), dispersant solution, and non-aqueous dispersion medium (isooctane) are loaded into the reaction vessel, the other is the same as the first process of embodiment I-1, and the preparation non-aqueous dispersion.
[0298] Again, in embodiment I-2, use 75.0 grams of plasticizers "PEG400 dibenzoate" obtained by polyethylene glycol 400 (1 mole) and benzoic anhydride (2 moles); In 5, use plasticizer "PEG200 dibenzoate" 50.0 g obtained from plasticizer "PEG400 dibenzoate", polyethylene glycol 200 (1 mole) and benzoic anhydride (2 mole) Gram; In embodiment I-11, use plasticizer " PEG200 dibenzoate " 50.0 grams.
[0299] (2) The second process
[0300] According to the formula shown in Table 1 below, except that HDI and a catalyst were added ...
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