A fluorine-free water-repellent and antifouling finishing agent and its preparation method and application
A fluorine-free water-repellent and finishing agent technology, applied in anti-coloring pollution/anti-fouling fibers, fiber treatment, shrink-proof fibers, etc., can solve the problems of no anti-fouling and finishing agents that cannot achieve super water repellency, etc. Achieving ease of implementation, maintaining feel and breathability, and low cost
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Embodiment 1
[0029] Example 1. A fluorine-free water-repellent and antifouling finishing agent
[0030] The fluorine-free water-repellent and antifouling finishing agent described in Example 1 of the present invention includes system A and system B, the weight ratio of system A and system B in the finishing agent is 1:0.7, and the system A is composed of 0.3% chitosan oligosaccharide , water-based polyurethane 8% and the balance of water, the system B is modified nano-silica sol.
[0031] Preparation:
[0032] ⅰ) Preparation of system A: dissolving chitosan and water-based polyurethane in water, and mixing uniformly to obtain system A;
[0033] ii) Preparation of system B:
[0034] S1. Dilute the water glass with a modulus n of 2 with distilled water until the silicon content of the solution is 4wt%, to obtain a water glass solution; in the state of stirring at a speed of 10ml / min, press the water glass solution: mixed solution = 1:1 Add the above-mentioned water glass solution dropwise...
Embodiment 2
[0038] Example 2, a fluorine-free water-repellent and antifouling finishing agent
[0039] The fluorine-free water-repellent and antifouling finishing agent described in Example 2 of the present invention includes system A and system B, the weight ratio of system A and system B in the finishing agent is 1:0.6, and the system A is composed of 0.8% chitosan oligosaccharide , water-based polyurethane 6% and the balance of water, the system B is modified nano-silica sol.
[0040] Preparation:
[0041] ⅰ) Preparation of system A: dissolving chitosan and water-based polyurethane in water, and mixing uniformly to obtain system A;
[0042] ii) Preparation of system B:
[0043] S1. Dilute the water glass with a modulus n of 2 with distilled water until the silicon content of the solution is 4wt%, to obtain a water glass solution; in the state of stirring at a speed of 10ml / min, press the water glass solution: mixed solution = 1:1 Add the above-mentioned water glass solution dropwise...
Embodiment 3
[0047] Example 3. A fluorine-free water-repellent and antifouling finishing agent
[0048] The fluorine-free water-repellent and antifouling finishing agent described in Example 3 of the present invention includes system A and system B, and the weight ratio of system A to system B in the finishing agent is 1:0.8, and the system A is composed of 1% chitosan oligosaccharide , water-based polyurethane 10% and the balance of water, the system B is modified nano-silica sol.
[0049] The preparation method refers to Example 2.
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