Fluorine-containing waterproofing agent for textiles and method for preparing same

A water repellent and fabric technology, applied in textiles, papermaking, fiber processing, etc., can solve the problems of large amount of fluorine-containing monomers and high cost, and achieve the effects of low cost, improved performance and good waterproof performance.

Active Publication Date: 2012-08-15
京准化工技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting polymer is a fluorine-containing polymer, in which the amount of fluorine-containing monomer is large and the cost is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Fluorine-containing waterproofing agent for textiles and method for preparing same
  • Fluorine-containing waterproofing agent for textiles and method for preparing same
  • Fluorine-containing waterproofing agent for textiles and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the molecular weight of fluorine-containing block copolymer is 10000, and the structure is:

[0040]

[0041] A. Preparation of fluorine-containing block copolymer:

[0042] In a 500ml four-necked flask, add 78g (0.5485mol) of butyl methacrylate, 10g (0.06360mol) of dimethylaminoethyl methacrylate, 2g (0.01537mol) of hydroxyethyl methacrylate, and the initiator α-bromo Ethyl isobutyrate 1.948g (0.01mol), CuBr 2 0.03504g (0.1569mmol) and PMDETA 0.2714g (1.569mmol) catalyst complex, reducing agent Sn(EH) 2 5.0961g (0.01256mol), solvent toluene 45g (50% of the monomer mass), after mixing evenly, nitrogen gas was passed for 1h, and reacted in an oil bath at 85°C for 4h. After the conversion rate reached 85%, a light yellow viscous product was obtained . Then, 10 g of trifluoroethyl acrylate and 5 g of toluene were added to the reaction vessel, and the reaction was continued for 3 h. After the reaction, a yellow viscous substance was obtained, and the c...

Embodiment 2

[0047] Embodiment 2: the molecular weight of fluorine-containing block copolymer is 10000, and the structure is:

[0048]

[0049] A. Preparation of fluorine-containing block copolymer:

[0050] Add 73g (0.8488mol) of butyl acrylate to a 500ml four-necked flask, 10g (0.06360mol) of dimethylaminoethyl methacrylate, 2g (0.01537mol) of hydroxyethyl methacrylate, and the initiator α-bromoisobutyl Ethyl acetate 1.948g (0.01mol), CuBr 2 0.04740g (0.2122mmol) and PMDETA 0.3671g (2.122mmol) catalyst complex, reducing agent Sn(EH) 2 3.4437g (0.008488mol), solvent toluene 45g (50% of the monomer mass), after mixing evenly, nitrogen gas was passed for 1h, and then reacted in an oil bath at 85°C for 4h. After the conversion rate reached 85%, a light yellow viscous product was obtained . Then, 15 g of hexafluorobutyl methacrylate and 7.5 g of toluene were added to the reaction vessel, and the reaction was continued for 3 h. After the reaction, a yellow viscous substance was obtain...

Embodiment 3

[0055] Embodiment 3: the molecular weight of fluorine-containing block copolymer is 10000, and the structure is:

[0056]

[0057] A. Preparation of fluorine-containing block copolymer:

[0058] In a 500ml four-necked flask, add 68g (0.7907mol) of methyl acrylate, 10g (0.06360mol) of dimethylaminoethyl methacrylate, 2g (0.01537mol) of hydroxyethyl methacrylate, and the initiator α-bromoisobutyl Ethyl acetate 1.948g (0.01mol), CuBr 2 0.03792g (0.1698mmol) and PMDETA 0.2937g (1.698mmol) catalyst complex, reducing agent Sn(EH) 2 2.7554g (0.00679mol), solvent toluene 45g (50% of the monomer mass), after mixing evenly, nitrogen gas was passed for 1h, and then reacted in an oil bath at 85°C for 4h. After the conversion rate reached 85%, a light yellow viscous product was obtained . Then, 5 g of dodecafluoroheptyl methacrylate and 2.5 g of toluene were added to the reaction vessel, and the reaction was continued for 3 h. After the reaction, a yellow viscous substance was obt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a fluorine-containing waterproofing agent for textiles and a method for preparing the same, belonging to the chemical material field. A self-emulsifying fluorine-containing acrylate block copolymer is synthesized by means of ARGETATRP (Activators Regenerated by Electron Transfer for Atom Transfer Radical Polymerization); and the self-emulsifying fluorine-containing acrylate block copolymer can be directly used after being emulsified and diluted. The self-emulsifying fluorine-containing acrylate block copolymer prepared by the method has excellent pH stability, chemical stability, diluting stability and storage stability; and the fluorine-containing structure units are distributed in form of blocks on the polymeric chain of the fluorine-containing acrylate block copolymer so that the fluorine-containing chain segments can be effectively utilized. Compared with a random fluorocarbon resin, the fluorine-containing acrylate block copolymer is capable of achieving the same performance and the usable amount of fluorine-containing monomers is very low. Moreover, textiles finished by the fluorine-containing waterproofing agent have excellent waterproofness; and compared with the similar products, the fluorine efficiency is improved and the cost is reduced.

Description

technical field [0001] The invention relates to a fluorine-containing water repellent and a preparation method thereof, in particular to a fluorine-containing acrylic block copolymer synthesized by atom transfer radical polymerization and an electron transfer catalyst to generate a water repellent, and the water repellent obtained after emulsification can impart The fabric has excellent waterproof performance, and has excellent storage stability and dilution stability. Background technique [0002] Fluoroacrylates have good hydrophobicity and oil repellency due to their good intrinsic chemical stability, heat and light stability; especially their low surface energy. The use of various fluoropolymers on fibers and fibrous substrates can impart oil and water repellency to fibers and fibrous substrates such as textiles, paper and leather. However, due to the high price of fluorine compounds, its application and promotion are limited. [0003] One of the most effective methods...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/277C08F293/00
Inventor 李坚孙婷婷
Owner 京准化工技术(上海)有限公司
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