Water and oil repellent finishing agent and its preparation method and application, water and oil repellent treatment method
A technology of water and oil repellency and treatment method, which is applied in fiber treatment, textiles and papermaking, and liquid repellent fibers, etc. It can solve the problems of oil repellency decline, water repellency and oil repellency decline, etc., and achieve water and oil repellency performance The effect of good and excellent water and oil repellency
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[0047]
[0048] The preparation method of the water and oil repellent finishing agent of the present invention comprises: (1) pre-emulsification step; (2) reaction step.
[0049] In step (1), perfluoroalkyl ethyl (meth)acrylate, (meth)acrylic acid C15~C25 alkyl ester, isocyanate-containing (meth)acrylate, thiol regulator , isomeric alcohol polyoxyethylene ether, C6-C25 alkyl polyoxyethylene ether, propylene glycol condensate and water are uniformly mixed, and pre-emulsified to obtain a pre-emulsion. A high-pressure homogenizer can be used for pre-emulsification treatment. The mixing order of the above components is not particularly limited. The type and amount of each component are as described above, and will not be repeated here.
[0050] In step (2), the pre-emulsion, vinyl chloride and azo initiator are placed in a reactor with an inert atmosphere and mixed evenly, and then reacted to obtain a water- and oil-repellent finishing agent. Specifically, put the pre-emulsio...
preparation example 1～2
[0076] Preparation Examples 1-2 and Preparation Comparative Example 1 - Preparation of Water and Oil Repellent Finishing Agent
[0077] (1) According to the formula in Table 1, perfluorooctyl ethyl acrylate, stearyl acrylate, isocyanate-containing (meth)acrylate (methacrylic acid-2-isocyanatoethyl 3, 5-dimethylpyrazole adduct), n-dodecyl mercaptan, isomeric alcohol polyoxyethylene ether (isomeric tridecyl polyoxyethylene ether (20)), cetyl polyoxyethylene ( 20) Ether, propylene glycol condensate (dipropylene glycol) and water are uniformly mixed in a high-pressure homogenizer, and then pre-emulsified to obtain a pre-emulsion.
[0078] (2) Put the pre-emulsion, vinyl chloride and azobisisobutyronitrile in a nitrogen atmosphere pressure reactor and mix them evenly, and react at 70°C for 6h; then depressurize the pressure reactor to a relative vacuum of -0.5 MPa, lower the temperature to 25°C and react for 20 minutes to obtain a water and oil repellent finishing agent.
[0079...
Embodiment 1～7 and comparative example 1～3
[0081] Examples 1-7 and Comparative Examples 1-3-Water and Oil Repellent Treatment
[0082] According to the formulation in Table 2, the above-mentioned water and oil repellent finishing agent, crosslinking agent (melamine resin crosslinking agent, BECKAMINE M3 from DIC Company), organic solvent (isopropanol), acetic acid and water were uniformly mixed to obtain a treatment solution.
[0083] Table 2
[0084]
[0085] The above-mentioned treatment solution was used to carry out water and oil repellent treatment on the textile fabric (the blended woven fabric of aramid fiber and viscose fiber with a weight ratio of 70:30). The textile is treated by padding with the treatment solution, and then the textile is sequentially dried and baked to obtain the water and oil repellent treated textile. The padding method is two dipping and two rolling, and the excess rolling rate is 62%. The drying temperature is 120°C, and the drying time is 120s. The baking temperature is 160°C, ...
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