Sterilizing shape-memory-fabric finishing agent and finishing method
A fabric finishing agent and memory technology, applied in fiber processing, textiles and papermaking, etc., can solve the problems of complicated process, high formaldehyde emission, large loss of fabric strength, etc., and achieve broad application prospects, low formaldehyde content, and small strength loss. Effect
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Embodiment 1
[0022] 1. Preparation of waterborne shape memory polyurethane
[0023] Add 40 grams of polypropylene glycol (molecular weight 2000, dried), 30 grams of hydroxyl-terminated silicone oil (molecular weight 1000, dried), stannous octoate (0.5 grams) and 20 grams of isophorone diisocyanate in 1000 ml, with mechanical stirring , In a four-neck glass flask connected to the nitrogen port. Dry nitrogen was introduced, mechanically stirred, and kept at 80° C. for 4 hours. Then 40 grams of polyethylene glycol (molecular weight 1000, dried) was added, and 1,4-butanediol (0.9 grams) was added as a chain extender, and the reaction was continued for 3 hours under the condition of maintaining 90°C. During the reaction, 20 ml of dimethylformamide was added. The temperature of the reactants was then lowered to 30°C. Under the high-speed stirring (2000rp / m) of the stirrer, 500 milliliters of deionized water was added to obtain a colorless and transparent water-based shape-memory polyurethane ...
Embodiment 2
[0033] 1. Preparation of waterborne shape memory polyurethane
[0034]Add 60 grams of polyethylene glycol (molecular weight 3000, dried), 300 grams of hydroxyl-terminated silicone oil (molecular weight 6000, dried), dibutyltin dilaurate (2.5 grams) and 20 grams of 1,6-hexamethylene Diisocyanate in a 2000 ml four-neck glass flask with mechanical stirring and a nitrogen port. Dry nitrogen was introduced, mechanically stirred, and kept at 80° C. for 3 hours. Then add 40 grams of polytetrahydrofuran ether glycol (molecular weight 1000, dried), and then add 4 grams of dimethylol propionic acid as a chain extender and keep the reaction at 90°C for 4 hours. The temperature of the reactants was then lowered to 50°C. Under the high-speed stirring (2000rp / m) of the stirrer, 570 milliliters of deionized water containing 3 grams of triethylamine was added to obtain a colorless and transparent water-based shape-memory polyurethane with a solid content of 43%.
[0035] 2. Preparation of ...
Embodiment 3
[0044] 1. Preparation of waterborne shape memory polyurethane
[0045] Add 60 grams of polytetrahydrofuran diol (molecular weight 3000, dried), 300 grams of hydroxyl-terminated silicone oil (molecular weight 10000, dried), zinc sulfate (1.0 gram) and 26 grams of 4,4'-dicyclohexylmethane diisocyanate in 2000 ml four-neck glass flask with mechanical stirring and nitrogen port. Dry nitrogen was introduced, mechanically stirred, and kept at 80° C. for 5 hours. Then add 18 grams of polypropylene glycol (molecular weight 600, dried), and then add 2.7 grams of dimethylol propionic acid as a chain extender and keep the reaction at 100°C for 3 hours. During the reaction, 20 ml butanone was added. The temperature of the reactants was then lowered to 50°C. Under the high-speed stirring (2500rp / m) of the stirrer, 570 milliliters of deionized water containing 0.8 gram of sodium hydroxide was added to obtain a colorless and transparent water-based shape-memory polyurethane with a solid c...
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