| Name | finishing agent based on water dispersed polysiloxang polyurethane block copolymers |
| Synonyms | Organic silicon block waterborne polyurethane finishing agent |
| Physical and Chemical Properties | The chemical quality product is a water white emulsion. |
| Use | Use of this product can be used as a finishing agent for durability, anti-wrinkle and anti-shrinkage finishing agent, and a finishing agent for imitation leather. The fabric finished with this product has excellent anti-shrinkage, anti-wrinkle, abrasion resistance and high resilience and permeability. This product can also give the fabric soft, waterproof, weather resistance, tear resistance, and has obvious antistatic and antifouling properties. |
1. Preparation of Organosilicon Block Polyurethane Prepolymer
Add polyethylene glycol, hydroxyl terminated polysiloxane, and toluene diisocyanate in proportion to the reaction kettle, and add acetone as the solvent. Stir and heat up to 70 ℃, and react for 4 hours.
2. Preparation of Organosilicon Blocked Waterborne Polyurethane
Add 3- (- N-methyldiethanolamine chloride) -1,2-epoxypropane to the reactor, and then add a certain amount of solvent acetone. Slowly add the prepared prepolymer at room temperature, and add it within 30 minutes. Then raise the temperature to 50 ℃, stir for 2 hours, add water, and adjust the pH value to 7 with acetic acid. Steam out acetone.
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.
preparation of silicone block polyurethane prepolymer polyethylene glycol, hydroxyl-terminated polysiloxane and toluene diisocyanate were added to the reaction kettle in proportion, and acetone was added as solvent. Stir and raise the temperature to 70 ℃, and react for 4 h.
Preparation of Silicone Block Waterborne Polyurethane 3-(-N-methyl diethanol amine chloride-)-1,2-propylene oxide is added to the reaction kettle, then a certain amount of solvent acetone is added, the prepolymer is slowly added at room temperature, and the prepolymer is added within 30 min. Then raise the temperature to 50 ℃, stir for 2 h, add water, and adjust the pH value to 7 with acetic acid. Just steam out acetone.