Preparation method of fluoride-free waterproof agent and product thereof
A fluorine-free water repellent and catalyst technology, applied in textiles and papermaking, liquid-repellent fibers, fiber treatment, etc., can solve the problems that fluorine-free water repellents are difficult to achieve waterproof effect, limited application, and the waterproof effect is not durable enough, etc. Achieve the effect of improving waterproof effect, high market prospect and strong adhesion
- Application Information
AI Technical Summary
Problems solved by technology
 In order to solve the above problem, the first aspect of the present invention provides a method of preparing a fluorine-free water repellent, including the following steps:
 a. Mix the organic solvent, catalyst, water, tetraeth ester and silane of orthosilicate to obtain a mixture;
 b. Alkane derivatives, emulsifiers, initiators, water of the above mixture, the number of carbon atoms ≥ 10, mixed with fluorine-free water repellent.
 The step A in this application is prepared by the modified nano silica mixture.
 From the perspective of increasing the reaction rate, in some preferred embodiments, the organic solvent is selected from one or more of ethanol, diethyl ether, methanol, acetone, isopropanol, tetrahydrofuran; further preferred, The organic solvent is selected from one or more of ethanol, diethyl ether, methanol.
 In some preferred embodiments, the catalyst is an acid catalyst or a base catalyst.
 The acid catalyst in ...
 Example 1
 Example 1 provides a method for producing a fluorine-free waterproofing agent, comprising the steps of:
 a. 320g to 900g of anhydrous ethanol and water were mixed, adjusted to pH 3 hydrochloric acid, stirred at 55 ℃ 25min, added dropwise 360g tetraethylorthosilicate and 10g 3- glycidoxypropyl methyl diethoxy silane, 60 ℃ stirred for 60min, to obtain a mixture.
 b. Under nitrogen, the mixture in step a 100g, dodecanol 15g, 10g cardanol polyoxyethylene polyoxypropylene ethers (preferably Cable available from Shandong Chemical Co., Ltd., trademark BGF-6), 2g ammonium persulfate, 30g of water were mixed and reacted for 2h at 80 ℃, waterproofing agent to obtain fluorine-free.
 Example 2
 Example 2 provides a method for producing a fluorine-free waterproofing agent, comprising the steps of:
 a. 320g to 900g of anhydrous ethanol and water were mixed, adjusted to pH 10 aqueous ammonia, stirred at 55 ℃ 25min, added dropwise 360g tetraethylorthosilicate and 10g 3- glycidoxypropyl triethoxysilane , 60 ℃ stirred for 60min, to obtain a mixture.
 b. Under nitrogen, 100g of a mixture of step a, methyl eighteen 15g, 10g, linear alcohol ethoxylates (commercially available from Jiangsu MSC petrochemical plants, Grade OE-2), 2g through ammonium sulfate, 30g of water were mixed, adjusted to pH 8, the reaction 2h at 80 ℃, waterproofing agent to obtain fluorine-free.
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