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Preparation method of fluorine-containing methacrylic acid emulsion

A technology of methacrylic acid and emulsion, which is applied in the direction of coating, etc., can solve the problems of limited hydrophobic ability of coating, loss of hydrophobic ability, restrictions on the use of fluorine-containing acrylic products, etc., and achieve good hydrophobic performance

Inactive Publication Date: 2018-04-24
王琪宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The fluorine-containing acrylic products produced by the above patents and known technologies often lose their hydrophobicity after repeated use due to the limited hydrophobicity of the coating, which limits the use of fluorine-containing acrylic products.

Method used

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  • Preparation method of fluorine-containing methacrylic acid emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] a, add the water of 20g in 100ml reactor, the methacrylic acid of 5g part, the 3g part: 1-(trimethylsilyl) propyne, the dodecanethiol of 0.05g and the potassium persulfate of 0.05g, fully Nitrogen protection, react at 50°C~55°C for 1 hour, then cool down to 30°C~35°C, add alkali to adjust the pH value to 7~8, and use it as a prepolymer for later use.

[0018] B, in 1000ml reactor, add the water of 200g, the methacrylic acid of 25g, 15g: 1-(trimethylsilyl) propyne, 6g prepolymer and 4-allyl trifluorotoluene 8g, three [ N,N-bis(trimethylsilane)amine]europium 0.11g, zirconium tetramethacrylate 1g, start stirring, heat up to 70~75°C, keep warm for 30~40min, then add 0.5g potassium persulfate to continue the reaction 1 ~1.5 hours. After the heat preservation reaction, continue to add dropwise the monomer mixture consisting of 25g of methacrylic acid, 15g of :1-(trimethylsilyl) propyne and 8g of fluorine monomer, and complete the addition within 2 to 3 hours. After the addi...

Embodiment 2

[0020] a, in 100ml reactor, add the water of 25g, the methacrylic acid of 6g part, the 1-(trimethylsilyl) propyne of 4g part, the dodecanethiol of 0.1g and the potassium persulfate of 0.1g, fully Nitrogen protection, react at 50°C~55°C for 1 hour, then cool down to 30°C~35°C, add alkali to adjust the pH value to 7~8, and use it as a prepolymer for later use.

[0021] B, in 1000ml reactor, add the water of 250g, the methacrylic acid of 30g, 20g: 1-(trimethylsilyl) propyne, 7g prepolymer and 4-allyl trifluorotoluene 9g, three [ N,N-bis(trimethylsilane)amine]europium 0.06g, zirconium tetramethacrylate 0.5g, start stirring, heat up to 75~80°C and keep it warm for 35~40min, then add 0.7g potassium persulfate to continue the reaction 1~1.5 hours. After the heat preservation reaction, continue to drop the monomer mixture composed of 30g of methacrylic acid, 20g of :1-(trimethylsilyl) propyne and 9g of fluorine monomer, and finish adding within 2 to 3 hours. After the addition, 0.7 ...

Embodiment 3

[0023] a, add the water of 30g in 100ml reactor, the methacrylic acid of 7g parts, the 1-(trimethylsilyl) propyne of 4g parts, the dodecanethiol of 0.2g and the potassium persulfate of 0.2g, fully Nitrogen protection, react at 50°C~55°C for 1 hour, then cool down to 40°C~45°C, add alkali to adjust the pH value to 7~8, and use it as a prepolymer for later use.

[0024] B, in 1000ml reactor, add the water of 300g, the methacrylic acid of 35g, 25g: 1-(trimethylsilyl) propyne, 8g prepolymer and 4-allyl trifluorotoluene 10g, three [ N,N-bis(trimethylsilane)amine]europium 0.24g, zirconium tetramethacrylate 2g, start stirring, heat up to 75~80°C, keep it warm for 35~40min, then add 1g of potassium persulfate to continue the reaction for 1~ 1.5 hours. After the heat preservation reaction, continue to add dropwise the monomer mixture consisting of 35g of methacrylic acid, 25g of :1-(trimethylsilyl) propyne and 10g of fluorine monomer, and complete the addition within 2 to 3 hours. Af...

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Abstract

The invention relates to a preparation method of fluorine-containing methacrylic acid emulsion. 200-300 parts of water, 25-35 parts of methacrylic acid, 15-25 parts of butyl acrylate, prepolymer and 6-10 parts of 4-allyl trifluorotoluene. After a heat preservation reaction is performed for 30-40 min, an initiator is added for a reaction for 1-1.5 h. After the reaction is completed, a monomer mixture continues to be dropped, and the mixture is completely added within 2-3 h. After the mixture is added, 0.5-1 part of initiator is added, the reaction continues to be performed for 1.5-3 h, and thefluorine-containing methacrylic acid emulsion with the high hydrophobicity can be obtained.

Description

technical field [0001] The invention relates to a preparation method of fluorine-containing methacrylic acid emulsion, in particular to a preparation method of highly hydrophobic fluorine-containing methacrylic acid emulsion. Background technique [0002] Acrylic emulsion is a chemical with wide applicability. It can be used as a new type of chemical material for repairing anti-seepage, anti-corrosion, and anti-freezing of steel structure concrete such as hydraulic engineering, port engineering, highways, bridges, and other industrial and civil buildings. Acrylate polymers containing perfluorinated side chain groups not only maintain the characteristics of acrylate, but also have excellent surface properties, and are widely used in post-treatment of fabrics, leather, paper, etc., making them water-repellent, repellent Excellent properties of oil. [0003] CN103539880B discloses a seed emulsion polymerization using a fluorine-containing copolymer as a co-emulsifier and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F265/02C08F220/06C08F238/00C08F212/14C09D151/00
CPCC08F265/02C09D151/003C08F220/06C08F212/14
Inventor 王琪宇董建国
Owner 王琪宇