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Fluorine-containing water and oil repellent agent and preparation method and application thereof

A technology of water and oil repellent and reaction point, which is applied in plant fiber, fiber treatment, textile and paper making, etc. It can solve the problems of inability to form stable liquid crystal, complicated preparation process, and inability to crystallize branched chains, so as to reduce biological toxicity and Permanent accumulation, easy industrial production, and mild reaction conditions

Active Publication Date: 2014-04-02
BEIJING CTA TEX CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fluorine-containing water and oil repellents, when the number of side chain fluorine-containing chain carbons is less than 8, the shorter branched chains can neither crystallize nor form stable liquid crystals, and the surface molecules of the corresponding polymers have higher mobility, which is very The surface will be restructured when contacting with sexual substances, and its coating effect on the fiber will be relatively weakened, and it will not be possible to obtain a dense protective film formed on the surface of the fabric by the long fluorocarbon chain water and oil repellent agent, making the water and oil repellency of the short fluorocarbon chain poor
Since the discovery of the lotus leaf effect, people have broken through the conventional thinking in theory, using fluoropolymer-nanoparticle composite system to finish fabrics, and constructing rough surfaces through nanomaterials to achieve hydrophobic and oleophobic self-cleaning effects, but the preparation process is complicated. The organic solvents used to functionalize inorganic materials are costly, flammable and explosive, and have certain pollution to the environment. In addition, the harm of nanomaterials to the human body is still controversial. This fluoropolymer-nanoparticle composite system is used in It has not been widely used in actual production, and how to improve the performance of short fluorine chain water and oil repellent agents is particularly urgent

Method used

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  • Fluorine-containing water and oil repellent agent and preparation method and application thereof
  • Fluorine-containing water and oil repellent agent and preparation method and application thereof
  • Fluorine-containing water and oil repellent agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1. Preparation of fluorine-containing water and oil repellent

[0064] 60 g of perfluorohexylethyl methacrylate, 60 g of propoxylated trimethylolpropane triacrylate, 5 g of N-methylol acrylamide, 0.25 g of dodecyl mercaptan, dodecyl polyoxy Ethylene (10) ether 5g, octadecyltrimethylammonium chloride 2g, tripropylene glycol 40g were added to 400g of deionized water, mixed with high-speed shearing, and then placed in a high-pressure homogenizer to emulsify for 10 minutes to obtain stable oil-in-water pre-emulsion.

[0065] In the above-mentioned oil-in-water pre-emulsion, the emulsifiers (dodecyl polyoxyethylene (10) ether and octadecyl trimethyl ammonium chloride) are monomers (perfluorohexyl ethyl methacrylate, propylene Oxylated trimethylolpropane triacrylate and N-methylol acrylamide) 5.6% of the total mass; chain transfer agent (dodecyl mercaptan) is 0.2% of the total monomer mass; organic solvent (two Tripropylene glycol) is 32% of the total monomer mass; ...

Embodiment 2

[0069] Example 2. Preparation of fluorine-containing water and oil repellent

[0070] 50 g of perfluorohexylbutyl methacrylate, 60 g of trimethylolpropane triacrylate, 6 g of hydroxypropyl methacrylate, 3 g of glycidyl methacrylate, 0.25 g of dodecyl mercaptan, isomerized fat 4 g of alcohol polyoxyethylene (9) ether, 5 g of cetyltrimethyl ammonium chloride, and 40 g of isopropanol were added to 400 g of deionized water, mixed with high-speed shearing, and then placed in a high-pressure homogenizer to emulsify for 10 minutes. A stable oil-in-water pre-emulsion was obtained.

[0071] In the above-mentioned oil-in-water pre-emulsion, the emulsifiers (isomerized fatty alcohol polyoxyethylene (9) ether and cetyltrimethylammonium chloride) are monomers (perfluorohexylbutyl methacrylate, trimethylammonium chloride) Methylol propane triacrylate, hydroxypropyl methacrylate and glycidyl methacrylate) 7.6% of the total mass; chain transfer agent (dodecyl mercaptan) is 0.2% of the total ...

Embodiment 3

[0075] Example 3. Preparation of fluorine-containing water and oil repellent

[0076] 40 g of perfluorohexylethyl methacrylate, 60 g of ethoxylated trimethylolpropane triacrylate, 6 g of diacetone acrylamide, 2 g of N-methylol acrylamide, 0.25 g of dodecyl mercaptan g. 8 g of dodecyl trimethyl ammonium chloride and 35 g of methyl ethyl ketone were added to 400 g of deionized water, and then placed in a high-pressure homogenizer to emulsify for 10 minutes after high-speed shearing and mixing to obtain stable oil-in-water type pre-emulsion.

[0077] In the above oil-in-water pre-emulsion, the emulsifier (dodecyl trimethyl ammonium chloride) is the monomer (perfluorohexyl ethyl methacrylate, ethoxylated trimethylolpropane triacrylic acid) ester, diacetone acrylamide and N-methylol acrylamide) 7.5% of the total mass; chain transfer agent (dodecyl mercaptan) is 0.23% of the total monomer mass; organic solvent (methyl ethyl ketone) It is 32.4% of the total mass of the monomer; wat...

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Abstract

The invention discloses a fluorine-containing water and oil repellent agent and a preparation method and application thereof. The structural formula of the fluorine-containing water and oil repellent agent is shown by the formula I, wherein x is a natural number from 1 to 100, and y and z are both a natural number from 1 to 400; in the formula I, the group R is a group shown by the formula II, x represents the degree of polymerization, and Rx is of a dendritic structure; in the formula II, m is an integer from 0 to 3, R3 represents H or methyl, and * represents the reaction point of polymerization of the reaction group R; in the formula I, the group R1 is the group shown by the formula III; in the formula III, n is a natural number from 1 to 5, R4 represents H or methyl, and * represents the reaction point of polymerization of the reaction group R1; in the formula I, the group R2 is selected from the following functional monomers: glycidyl methacrylate, hydroxyethyl methylacrylate, diacetone acrylamide and hydroxymethyl acrylamide. According to the fluorine-containing water and oil repellent agent disclosed by the invention, low surface tension is generated on the fabric surface by use of an organic fluorine finishing agent, a nano / micron structure rough surface with a proper three-arm polyacrylate structure is introduced, and the synergistic effect of the organic fluorine finishing agent and the three-arm polyacrylate improves the properties of a short-fluorine chain water and oil repellent agent, so that the water and oil repellent agent is similar to a C8 product.

Description

technical field [0001] The invention relates to a fluorine-containing water- and oil-repellent agent, a preparation method and application thereof, and belongs to the technical field of textile chemicals. Background technique [0002] Organic fluorine finishing agents are widely used in the field of functional finishing of textiles to impart protective properties such as water and oil repellency to textiles, and most of them contain perfluoroalkyl (C n F 2n+1 , n=6-10), these long fluorocarbon chain groups have a good effect in reducing the surface free energy and improving the hydrophobic and oleophobic properties of the surface, thus becoming the mainstream of water- and oil-repellent finishing agents today. However, the final degradation products of long fluorocarbon chain compounds are mostly perfluorooctane sulfonyl compounds (PFOS) and perfluorooctanoic acid (PFOA), which are a class of refractory persistent organic pollutants, which are mainly distributed in the bloo...

Claims

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Application Information

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IPC IPC(8): D06M15/277C08F222/20C08F220/24C08F220/32C08F220/28C08F220/58C08F2/28C08F2/30C08F2/38D06M101/06
Inventor 李建华高殿权祝斌黄文博朱文兵
Owner BEIJING CTA TEX CHEM