| PH | 6.5~7.0 |
| Storage Condition | 贮存时请注意密封保存，存放于干燥、通风处，常温下有效期为12个月。 |
| Physical and Chemical Properties | Chemical quality This product is a light blue translucent liquid with high water resistance and high tensile and tear resistance after film formation. |
| Use | It is suitable for the finishing of garment leather, sofa leather, box leather and shoe upper leather. This series has six brands, PUC-321,PUC-331 suitable for finishing bottom leather, PUC-322,PUC-332 suitable for finishing middle layer leather, PUC-323 and PUC-333 suitable for top coating. |
| Caution | Non hazardous materials, not edible, avoid contact with the eyes, can be transported as general chemicals. |
1. Add 500kg linear polyester and 250kg branched polyester sequentially into the polymerization kettle, heat and melt. Dehydrate under reduced pressure at 120 ℃, then cool to 80 ℃, add 24kg of dibutyltin dilaurate, continue stirring to cool to 60 ℃, slowly add 217kg of xylene diisocyanate, and react at 80 ℃ for 1 hour to obtain prepolymer (I).
2. Add 51kg of diethylene glycol to the aforementioned prepolymer, react at 80 ° C for 3 hours, then cool to 50 ° C. Add tartaric acid acetone solution (46kg tartaric acid+120kg acetone), heat up to 60 ° C, reflux for 1 hour, and dilute with 2000kg acetone. Then add a acetone solution of triethanolamine for neutralization (32kg triethanolamine, 240kg acetone), and finally add an appropriate amount of distilled water to vigorously stir and emulsify to obtain the finished product.
500kg linear polyester and 250kg branched polyester are sequentially added to the polymerization kettle and heated and melted. Dehydration under reduced pressure at 120 ℃. Then cool to 80 ℃, add 2.4kg of dibutyltin dilaurate, continue to stir and cool to 60 ℃, slowly add 217kg of ditoluene diisocyanate, and react at 80 ℃ for 1h to obtain prepolymer (I).
51kg of diethylene glycol was added to the prepolymer, the temperature was reduced to 50 ℃ after reacting at 80 ℃ for 3 hours, tartaric acid acetone solution (46kg of tartaric acid plus 120kg of acetone) was added, the temperature was increased to 60 ℃ after adding, the temperature was refluxed for 1 hour, and the temperature was diluted with 2,000kg of acetone. Then add triethanolamine acetone solution to neutralize (triethanolamine 32kg, acetone 240kg), and finally add an appropriate amount of distilled water to agitate intensely to obtain the finished product.