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Preparation and application of short-chain fluorine-containing copolymer water-repellent oil-repellent finishing agent

A water- and oil-repellent, copolymer technology, which is applied in fiber treatment, liquid-repellent fibers, textiles and papermaking, etc., can solve the problems of unfavorable industrial production, poor water and oil repellency, and poor emulsion stability, etc., to achieve Eliminate bioaccumulation problems, reduce environmental impact, and produce safe effects

Active Publication Date: 2018-07-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide the preparation and application of a short-chain fluorine-containing copolymer water-repellent and oil-repellent finishing agent. While imparting excellent water- and oil-repellent properties to the fabric, the finishing agent ensures the original fabric wearability and overcomes the The long carbon chain fluorine-containing compounds in the prior art are difficult to degrade, bioaccumulation, poor emulsion stability, unfavorable to industrial production, environmental pollution and other problems, meet the needs of production or life, and overcome the problems of fluorocarbons in the prior art. When the number of chains is less than 8, the shorter carbon chains cannot be crystallized, the prepared emulsion cannot remain uniform and stable for a long time, and the water and oil repellency effect is poor.

Method used

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  • Preparation and application of short-chain fluorine-containing copolymer water-repellent oil-repellent finishing agent
  • Preparation and application of short-chain fluorine-containing copolymer water-repellent oil-repellent finishing agent
  • Preparation and application of short-chain fluorine-containing copolymer water-repellent oil-repellent finishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1) Weighing: Weigh 9.96 g of (perfluorobutyl) ethyl methacrylate, 4.65 g of cetyl methacrylate, and 0.20 g of hydroxyethyl methacrylate, and mix the three monomers evenly. Weigh 0.59g of cationic emulsifier tetradecyltrimethylammonium bromide, 0.36g of nonionic emulsifier (Brij L23), 27g of deionized water, add 0.10g of cetyl alcohol co-emulsifier to emulsifier aqueous solution Afterwards, it was stirred for 15 minutes in a water bath at 50°C.

[0060] 2) Emulsification: drop the monomer mixture into the aqueous emulsifier solution drop by drop, and stir at 50° C. for 30 minutes to obtain a pre-emulsion.

[0061] 3) Fine emulsification: the above-prepared pre-emulsion was stirred on a homogenizer at a speed of 10,000 r / min for 15 min in a water bath at 50° C. to obtain a finely emulsified monomer pre-emulsion.

[0062] 4) Polymerization: The monomer pre-emulsion after fine emulsification is poured into a four-necked flask with a condenser, a thermometer, and an agitato...

Embodiment 2

[0065] 1) Weighing: Weigh (perfluorobutyl) ethyl methacrylate 9.96g, stearyl methacrylate 5.40g, butyl methacrylate 1.07g, hydroxyethyl methacrylate 0.16g, and The four monomers are mixed evenly. Weigh cationic emulsifier cetyltrimethylammonium bromide 0.57g, nonionic emulsifier (Brij L4) 0.57g, deionized water 53g, 0.28g dodecyl mercaptan co-emulsifier is added to emulsifier The aqueous solution was then stirred in a 50 °C water bath for 15 min.

[0066] 2) Emulsification: drop the monomer mixture into the aqueous emulsifier solution drop by drop, and stir at 50° C. for 30 minutes to obtain a pre-emulsion.

[0067] 3) Fine emulsification: the pre-emulsion prepared above was ultrasonicated on an ultrasonic cell pulverizer with a power of 500 W for 15 min in a water bath environment of 50° C. to obtain a finely emulsified monomer pre-emulsion.

[0068] 4) Polymerization: The monomer pre-emulsion after fine emulsification is poured into a four-necked flask with a condenser, a ...

Embodiment 3

[0071] 1) Weighing: Weigh 8.2 g of (perfluorobutyl)(sulfonamide) ethyl acrylate, 9.72 g of stearyl acrylate, and 0.852 g of hydroxyethyl acrylate, and mix the three monomers evenly. Weigh 1.03g of cationic emulsifier octadecyltrimethylammonium bromide, 0.69g of nonionic emulsifier (Brij L20), 80g of deionized water, add 1.72g of cetyl alcohol co-emulsifier to the emulsifier aqueous solution Afterwards, it was stirred for 15 minutes in a water bath at 50°C.

[0072] 2) Emulsification: drop the monomer mixture into the aqueous emulsifier solution drop by drop, and stir at 50° C. for 30 minutes to obtain a pre-emulsion.

[0073] 3) Fine emulsification: the above-prepared pre-emulsion was stirred on a homogenizer at a speed of 10,000 r / min for 15 min in a water bath at 50° C. to obtain a finely emulsified monomer pre-emulsion.

[0074] 4) Polymerization: The monomer pre-emulsion after fine emulsification is poured into a four-necked flask with a condenser, a thermometer, and an a...

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Abstract

The invention discloses preparation and application of a short-chain fluorine-containing copolymer water-repellent oil-repellent finishing agent. A preparation method of the finishing agent comprisesthe following steps: taking short-carbon-chain perfluoroalkyl group acrylate, non-fluorine-containing acrylate monomer, and cross-linking monomer, emulsifying the monomers under the effect of a cationand nonionic compound emulsifier, further finely emulsifying by virtue of a homogenizing machine or in an ultrasonic environment, finally dropwise adding a water-soluble initiator, initiating the polymerization, and preparing a short-chain fluorine-containing copolymer fine emulsion. By adopting the fine emulsion polymerization method in the preparation process, no organic solvent is needed, andthe stability of the copolymer emulsion is ensured; and in addition, by utilizing a short-chain fluorine-containing chain segment with a carbon chain number smaller than 6, while the excellent water-repellent and oil-repellent performance is ensured, the environmental protection requirement can be met.

Description

technical field [0001] The invention relates to the field of functional finishing agents for textiles, in particular to the preparation and application of a short-chain fluorine-containing copolymer water- and oil-repellent finishing agent. Background technique [0002] Fluorine-containing finishing agents are widely used in the field of textile functional finishing because of their excellent water and oil repellency properties. Surface tension works best with -CF 3 group. Among them, due to the good film-forming properties of acrylic polymers, the polymers containing perfluoroalkyl side chains on fluorinated acrylates have the lowest surface tension and are the most widely used. Most of the fluorine-containing water repellents contain perfluoroalkyl (C n f 2n+1 , n≥8), these perfluoroalkyl long carbon chains have excellent water and oil repellency, but the final degradation products are mostly perfluorooctylsulfonyl compounds (PFOS) and perfluorooctanoic acid (PFOA). W...

Claims

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Application Information

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IPC IPC(8): C08F220/24C08F220/18C08F220/20C08F220/38C08F220/32C08F2/28C08F2/30D06M15/277
CPCD06M15/277C08F2/28C08F2/30C08F220/18C08F220/24C08F220/38D06M2200/12D06M2200/11C08F220/387C08F220/1818C08F220/20C08F220/325C08F220/1804
Inventor 王鸿博钱海洪杜金梅傅佳佳王文聪
Owner JIANGNAN UNIV
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