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A kind of fluorocarbon emulsion containing sulfonic acid group and preparation method thereof

A fluorocarbon emulsion and sulfonic acid-containing technology, applied in the field of fine chemicals, can solve the problems of emulsifier migration, poor compatibility, poor emulsion stability, etc., and achieve the effect of excellent stability and resource saving

Active Publication Date: 2017-04-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because a variety of pigments, fillers and additives need to be added to the fluorocarbon coating system, the compatibility of the system is poor, which ultimately affects the performance of the coating
In addition, the fluorocarbon emulsion also has problems such as "migration" of the emulsifier, which affects the performance of the coating film and poor emulsion stability.

Method used

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  • A kind of fluorocarbon emulsion containing sulfonic acid group and preparation method thereof
  • A kind of fluorocarbon emulsion containing sulfonic acid group and preparation method thereof
  • A kind of fluorocarbon emulsion containing sulfonic acid group and preparation method thereof

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preparation example Construction

[0033] A preparation method containing sulfonic acid group fluorocarbon emulsion, comprising the following steps:

[0034] 1) Raw materials: fluorine-containing acrylate, butyl acrylate, styrene, 2-acrylamide-2-methylpropanesulfonic acid, emulsifier, initiator and water.

[0035] Among them, the molar ratio of the polymerized monomer fluorine-containing acrylate, butyl acrylate, styrene, and 2-acrylamide-2-methylpropanesulfonic acid is 0.2-1.0:1.0:1.0:0.02-0.2; 0.5% to 5% of the total mass of the polymerized monomer; the initiator accounts for 0.1% to 2% of the total mass of the polymerized monomer; water accounts for 200% to 300% of the total mass of the polymerized monomer.

[0036] 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-emulsion.

[0037] 3) Add the remaining 30% water and 5% pre-emulsion in a dry three-nec...

Embodiment 1

[0041] A preparation method of fluorocarbon emulsion containing sulfonic acid group, its raw material components and consumption are as follows:

[0042] Fluorine-containing acrylate, butyl acrylate, styrene, 2-acrylamide-2-methylpropanesulfonic acid, emulsifier (sulfonation rate: 80%, -R f For: -C 4 h 3 f 6 O), ammonium persulfate and water; wherein: the molar ratio of fluorine-containing acrylate, butyl acrylate, styrene, and 2-acrylamide-2-methylpropanesulfonic acid is 0.8: 1.0: 1.0: 0.04; emulsifier ( Sulfonation rate: 80%, -R f For: -C 4 h 3 f 6 O) accounts for 1.9% 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 250% of the total mass of the polymerized monomers.

[0043] The preparation technology of this a kind of fluorocarbon emulsion containing sulfonic acid group:

[0044] Add all kinds of above-mentioned raw materials (70% of which is added with water, and...

Embodiment 2

[0046] A preparation method of fluorocarbon emulsion containing sulfonic acid group, its raw material components and consumption are as follows:

[0047] Fluorine-containing acrylate, butyl acrylate, styrene, 2-acrylamide-2-methylpropanesulfonic acid, emulsifier (sulfonation rate: 24%, -R f For: -C 5 h 3 f 8 O), ammonium persulfate and water; wherein: the molar ratio of fluorine-containing acrylate, butyl acrylate, styrene, and 2-acrylamide-2-methylpropanesulfonic acid is 0.4: 1.0: 1.0: 0.02; emulsifier ( Sulfonation rate: 24%, -R f For: -C 5 h 3 f 8 O) accounts for 2.3% of the total mass of the polymerized monomers; ammonium persulfate accounts for 1.8% of the total mass of the polymerized monomers; water accounts for 225% of the total mass of the polymerized monomers.

[0048] The preparation technology of this a kind of fluorocarbon emulsion containing sulfonic acid group:

[0049] Add all kinds of above-mentioned raw materials (70% of which is added with water, and t...

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Abstract

The present invention discloses fluorocarbon emulsion containing a sulfonic acid group and a preparation method therefor, and belongs to the technical field of fine chemical preparation. The fluorocarbon emulsion containing the sulfonic acid group consists of the following raw materials: fluorine-containing acrylate, butyl acrylate, styrene, 2-acrylamide-2-methylpropane sulfonic acid, an emulsifier, an initiator and water. The preparation comprises: adding 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) into a high-speed container to carry out high speed shearing 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 fluorocarbon emulsion containing the sulfonic acid group. The fluorocarbon emulsion containing the sulfonic acid group disclosed by the invention can solve the defects of relatively poor compatibility of fluoropolymer emulsion for coating, undesirable stability of emulsion, and the like. According to the emulsion, 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 preparation method of a fluorocarbon emulsion containing sulfonic acid groups. Background technique [0002] Fluorocarbon coatings have received widespread attention due to their excellent physical and chemical properties, and the fluorocarbon emulsions used in them are mainly carboxylic acid fluorocarbon acrylate emulsions. Because a variety of pigments, fillers and additives need to be added to the fluorocarbon coating system, the compatibility of the system is poor, which ultimately affects the performance of the coating. In addition, the fluorocarbon emulsion also has problems such as "migration" of the emulsifier, which affects the performance of the coating film, and the stability of the emulsion is poor. Contents of the invention [0003] In order to overcome the defects of the above-mentioned prior art, the ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/22C08F220/58C08F2/26
Inventor 宋洁周雷樊文娜李刚辉
Owner SHAANXI UNIV OF SCI & TECH
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