A kind of fluorine-free fabric water repellent with branched structure and preparation method thereof
A branched structure and water-repellent technology, applied in the direction of repelling fibers to liquids, etc., can solve the problems of poor durability of non-fluorine water-repellent agents, overcome the environmental hazards, overcome the toxicity of bioaccumulation, and solve the problem of poor durability. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0031] 23.1 parts of diisocyanate, 11.3 parts of long-chain alkane chain extender, 43.7 parts of organosiloxane, 5.8 parts of hydrophilic chain extender, 0.1 part of catalyst, 3.6 parts of neutralizing agent, 10.6 parts of end-capping agent, small molecule polyol 1.1 parts, 494 parts of water, 50 parts of acetone;
[0032] Step 1. Add 30.1g of aminopropyl-terminated polydimethylsiloxane and 0.75g of trihydroxypropane into the flask, and vacuumize at 100°C for 1 hour to remove moisture;
[0033] Step 2. When the temperature of the mixed solution in the flask drops to 40°C, add 15.9g IPDI and 0.068g T 12 , and then heated up to 75°C, stirred for 6h to obtain reaction system A;
[0034] Step 3. When the temperature of reaction system A drops to 50°C, add 7.8g of glyceryl monostearate, then raise the temperature to 75°C, and stir for 5 hours to obtain reaction system B;
[0035] Step 4. When the temperature of reaction system B drops to 35°C, add 4g diethanolamine and 34.4g acet...
Embodiment 2
[0039] 31.7 parts of diisocyanate, 19.5 parts of long-chain alkane chain extender, 23.7 parts of organosiloxane, 6.3 parts of hydrophilic chain extender, 0.1 part of catalyst, 9.2 parts of neutralizing agent, 8.2 parts of end-capping agent, small molecule polyol 1.2 parts, 120 parts of water, 30 parts of acetone;
[0040] Step 1. Add 16.8g of hydroxypropyl-terminated polydimethylsiloxane and 0.88g of trihydroxypropane into the flask, and vacuumize at 110°C for 1.5h to remove water;
[0041] Step 2. When the temperature of the mixed solution in the flask drops to 40°C, add 22.5g TDI and 0.07g TDI 12 , and then heated up to 90°C, stirred for 3h to obtain reaction system A;
[0042] Step 3. When the temperature of reaction system A drops to 45°C, add 13.8g of glyceryl monostearate, then raise the temperature to 85°C, and stir for 3 hours to obtain reaction system B;
[0043] Step 4. When the temperature of reaction system B drops to 40°C, add 4.5g of N-MDEA and 21.3g of acetone...
Embodiment 3
[0047] 28.1 parts of diisocyanate, 15.4 parts of long-chain alkane chain extender, 31.8 parts of organosiloxane, 8.1 parts of hydrophilic chain extender, 0.09 part of catalyst, 3 parts of neutralizing agent, 11.4 parts of end-capping agent, small molecule polyol 2.2 parts, 300 parts of water, 45 parts of acetone;
[0048] Step 1. Add 22.25g of silanol polydimethylsiloxane and 1.55g of pentaerythritol into the flask, and vacuumize at 90°C for 2 hours to remove moisture;
[0049] Step 2. When the temperature of the mixed solution in the flask drops to 50°C, add 19.7g HDI and 0.06g T 9 , and then heated to 98 ° C, stirred for 2 hours to obtain reaction system A;
[0050] Step 3. When the temperature of reaction system A drops to 50°C, add 10.8g of glyceryl distearate, then raise the temperature to 85°C, and stir for 3 hours to obtain reaction system B;
[0051] Step 4. When the temperature of reaction system B drops to 35°C, add 5.7g of triethanolamine and 31.5g of acetone, then ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More