| Name | Finishing agent |
| Synonyms | Finishing agent Fs |
| PH | 7~8 |
| Physical and Chemical Properties | A light yellow transparent solution with good stability and no stratification during long-term storage. |
| Use | This product is a textile finishing agent that can be used for dyeing and fixation of cotton, wool, and chemical fiber fabrics, and gives the fabric good softness. This product does not contain formaldehyde, has no special odor, does not cause dermatitis, and does not pollute the environment. |
It is irritating and should not come into direct contact with the skin. Place in a cool and ventilated warehouse, do not store with flammable materials, and keep away from ignition sources.
1. Preparation of intermediate G
Add dimethylamine aqueous solution (32%) to the reactor and add an appropriate amount of ice. Slowly add concentrated hydrochloric acid under stirring to adjust the pH value to around 5. Then add a quantitative amount of dimethylamine aqueous solution (32%) at around 25 ℃, and slowly add epichlorohydrin with stirring (the molar ratio of dimethylamine to epichlorohydrin is 1:1). After adding, stir at around 30 ℃ for 4-6 hours to obtain an aqueous solution of intermediate G with a solid content of 50%.
2. Synthesis of Intermediate F
Add polyethylenediamine and dicyandiamide to the reaction kettle (with a mass ratio of 26:21), raise the temperature to 100 ℃ under stirring, slowly raise the temperature to about 150 ℃, and continue stirring for 8 hours. Lower the temperature to 8-90 ℃ and add acetic acid aqueous solution to dissolve the condensed polymer. Dried polyethylenediamine dicyandiamide condensate. Take 70 portions of the above condensates and add them to a neutralization kettle. Add 65 portions of water and stir to dissolve. Slowly add 45% sulfuric acid to neutralize at 50 ℃ until the pH value is around 7. Stir for another 30 minutes to obtain an emulsion with a solid content of 50%, which is the intermediate F.
3. Preparation of Fs
Add 1 part of 50% intermediate F to the mixing kettle, and add 4 parts of 50% G under stirring to mix evenly. Heat up to 60 ℃. After stirring for 1 hour, add 100 parts of water and react until the clear solution is the product Fs.