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Cationic fluorine-containing emulsion and preparation method therefor

A cationic and emulsion technology, applied in the field of fine chemicals, can solve problems such as harsh reaction conditions, achieve stable performance and save resources

Active Publication Date: 2015-11-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, non-ionic polymerizable fluorine-containing surfactants are mainly polyurethane-based, but organic solvents are also used in the synthesis process, and the reaction conditions are harsh.

Method used

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  • Cationic fluorine-containing emulsion and preparation method therefor
  • Cationic fluorine-containing emulsion and preparation method therefor
  • Cationic fluorine-containing emulsion and preparation method therefor

Examples

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preparation example Construction

[0030] A preparation method of cationic fluorine-containing emulsion, comprising the following steps:

[0031] 1) Raw materials: fluorine-containing acrylate, butyl acrylate, styrene, dimethylaminoethyl methacrylate or methacryloyloxyethyltrimethylammonium chloride, emulsifier, initiator and water.

[0032] Wherein, the molar ratio of the polymerized monomer fluorine-containing acrylate, butyl acrylate, styrene, dimethylaminoethyl methacrylate or methacryloyloxyethyltrimethylammonium chloride is 0.2-1.0:1.0: 1.0:0.1-0.4; the emulsifier accounts for 0.5%-5% of the total mass of the polymerized monomers; the initiator accounts for 0.1%-2% of the total mass of the polymerized monomers; water accounts for 200%-300% of the total mass of the polymerized monomers.

[0033] 2) Add all kinds of above-mentioned raw materials (among them: 70% of water is added, and the remaining 30% is used for later use), put into a container and shear at high speed for 30 minutes to obtain a pre-emulsi...

Embodiment 1

[0038] A cationic fluorine-containing emulsion, its raw material components and consumption are as follows:

[0039] Fluorine-containing acrylate, butyl acrylate, styrene, dimethylaminoethyl methacrylate, emulsifier (-Rf is: -C 4 h 3 f 6 O), ammonium persulfate and water; wherein: the molar ratio of fluorine-containing acrylate, butyl acrylate, styrene, and dimethylaminoethyl methacrylate is 0.5:1.0:1.0:0.1; emulsifier (-Rf is :-C 4 h 3 f 6 O) accounts for 0.6% of the total mass of the polymerized monomers; ammonium persulfate accounts for 0.2% of the total mass of the polymerized monomers; water accounts for 210% of the total mass of the polymerized monomers.

[0040] The preparation process of the cationic fluorine-containing emulsion:

[0041] Add all kinds of above-mentioned raw materials (70% of which is added with water, and the remaining 30% for later use) into a container and shear at high speed for 30 minutes to obtain a pre-emulsion. Add the remaining 30% wate...

Embodiment 2

[0043] A cationic fluorine-containing emulsion, its raw material components and consumption are as follows:

[0044] Fluorine-containing acrylate, butyl acrylate, styrene, methacryloyloxyethyltrimethylammonium chloride, emulsifier (-Rf is: -C 4 h 3 f 6O), ammonium persulfate and water; wherein: the molar ratio of fluorine-containing acrylate, butyl acrylate, styrene, and methacryloxyethyltrimethylammonium chloride is 0.2:1.0:1.0:0.3; emulsifier (-Rf is: -C 4 h 3 f 6 O) accounts for 0.9% of the total mass of the polymerized monomers; ammonium persulfate accounts for 0.7% of the total mass of the polymerized monomers; water accounts for 240% of the total mass of the polymerized monomers.

[0045] The preparation process of the cationic fluorine-containing emulsion:

[0046] Add all kinds of above-mentioned raw materials (70% of which is added with water, and the remaining 30% for later use) into a container and shear at high speed for 30 minutes to obtain a pre-emulsion. ...

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Abstract

The present invention discloses a preparation method for cationic fluorine-containing emulsion, and belongs to the technical field of fine chemical preparation. Fluoropolymer emulsion containing a sulfonic acid group consists of the following raw materials: fluorine-containing acrylate, butyl acrylate, styrene, acrylic acid, dimethylaminoethyl methacrylate or methacryloyloxyethyl trimethyl ammonium chloride, an emulsifier, an initiator and water. The preparation comprises: carrying out high speed shearing on all types of the raw materials (wherein 70% of the water is added, and the remaining 30% of the water is kept for later use) for 30 minutes, taking the remaining 30% of water and 5% of the pre-emulsion after obtaining pre-emulsion, raising the temperature of the water and the pre-emulsion to 50-80 DEG C under stirring, and starting to carry out heat preservation; and starting to dropwise add the remaining pre-emulsion after carrying out the heat preservation for 30 minutes, enabling the remaining pre-emulsion to react for 5-25 hours, cooling the remaining pre-emulsion to the room temperature, and discharging the cooled pre-emulsion, thereby preparing the cationic fluorine-containing emulsion. According to the present invention, the emulsifier in the emulsion directly reacts with a polymeric monomer, thereby avoiding a migration problem of a conventional emulsifier; and meanwhile the water is used as a dispersion medium, so that no organic solvent is contained, resources are saved, and environment-friendly requirements are satisfied.

Description

technical field [0001] The invention belongs to the field of fine chemicals and relates to an emulsion and a preparation method thereof, in particular to a cationic fluorine-containing emulsion and a preparation method thereof. Background technique [0002] Fluoropolymers have been widely used due to their high surface activity, high heat resistance stability, high chemical inertness, hydrophobicity and oil repellency. Among them, cationic fluorine-containing emulsions are mainly used in fabric treatment. [0003] At present, there are several methods for preparing common fluorine-containing emulsions: (1) homopolymerization or copolymerization of monomers under the joint action of conventional emulsifiers / fluorine-containing emulsifiers; (2) under the action of conventional emulsifiers / organic solvents Homopolymerization or copolymerization of the following monomers; (3) simple blending of polytetrafluoroethylene emulsions and conventional emulsions; but in the above method...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F220/22C08F220/34C08F2/30C08G65/00
Inventor 宋洁樊文娜樊孟孟李刚辉
Owner SHAANXI UNIV OF SCI & TECH
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