A kind of fluorine-containing phosphate surfactant and preparation method thereof

Abstract

The invention discloses a fluorine-containing phosphoric acid ester surfactant and a preparation method thereof. Using 4-perfluoroalkenyloxybenzenesulfonyl chloride and 2-methylaminoethanol as raw materials, in the presence of an acid-binding agent, the After reacting for 2 to 12 hours at 0 to 150°C, the product N-hydroxyethyl-N-methyl-4-perfluoroalkenyloxybenzenesulfonamide is obtained through post-treatment; the above-mentioned N-hydroxyethyl-N-methyl Mix ‑4‑perfluoroalkenyloxybenzenesulfonamide with inorganic phosphorus compound, react at 30~200°C for 2~24 hours, then add lye to continue the reaction, the obtained reaction solution is separated, dehydrated and dried to obtain fluorine-containing phosphate surfactant . The synthesis method of the present invention is simple, the obtained fluorine-containing surfactant has excellent performance and high reaction yield, and the prepared fluorine-containing phosphate ester surfactant has low surface tension and high activity, and has good water and oil repellency, wettability and Emulsifying ability and good environmental friendliness, can be used as emulsifier, wetting agent, etc. in real life.

Description

technical field [0001] The invention relates to the field of surfactants, in particular to a fluorine-containing phosphate surfactant and a preparation method thereof. Background technique [0002] Due to the special properties of "three highs and two phobias", fluorosurfactants have attracted more and more attention from people. They are currently the most active category of all surfactants. They are mainly used in special occasions with high technical requirements or in general In areas where surfactants are difficult to perform and have poor application effects, its fluorine-containing hydrocarbon group is both hydrophobic and oil-repellent [New Chemical Materials, 2004, 32(8): 46]. In the 21st century, fluorine-containing surfactants are gradually developing in the direction of environmental friendliness, high surfactant and low cost. The development of fluorine-containing surfactants abroad and in my country is mainly based on 8-carbon perfluorooctyls as raw materials ...

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Problems solved by technology

The branched fluorocarbon surfactant developed with hexafluoropropylene trimer as raw material is easy to degrade under various physical and chemical conditions, and has low bioaccumulation. It is an ideal substitute for PFOS / PFOA. Reported ethylene, tetrafluoroethylene, perfluoroalkyl iodide telomerization in US8049040 B2, and then through a series of reaction steps to prepare the technological process of ethylene-tetrafluoroethylene phosphate composition fluorocarbon anion surfactant, the surface activity of this patent obtained The surface performance of the agent is excellent, but the telomerization process of ethylene, tetrafluoroethylene, and perfluoroalkyl iodide is complex and the yield is low, resulting in high cost and difficult industrialization. Patent US20110092410A1 reports the preparation of perfluoroalkane with hexafluoropropylene dimer as raw material A new process of phosphoric acid ester fluorocarbon anion surfactant, but the process has too many reaction steps, complex process, and expensive reagents such as cesium fluoride and bromopropylene are used, and the production cost is relatively high. Patent WO 9104978 (JP3123786 A) A preparation method of monophosphate fluorocarbon anionic surfactant is reported, but the raw material is not ω-H fluorinated alkyl alcohol, the raw material is difficult to obtain, and the production cost is high

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