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Aqueous composite paint containing amphiphilic fluorine-containing acrylate blocking copolymer and preparation thereof

A block copolymer, non-fluorine acrylate technology, applied in coatings, latex paints, etc., can solve the problem of weakening the modification effect of fluorine-containing groups, difficult for fluorine-containing groups to reach the surface of the coating film, weak coating adhesion, etc. The problem is to reduce the probability that the fluorine-containing group is difficult to reach the coating surface, reduce the performance of the coating and the adverse impact on the environment, and improve the adhesion.

Inactive Publication Date: 2010-12-15
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Judging from the current research process of developing water-based fluoropolymer coatings at home and abroad, there are still two shortcomings in this coating: 1. Because the fluorine-containing coating has a hydrophobic and oleophobic surface, the adhesion of the coating is relatively weak; 2. 1. Fluorine-containing acrylate coatings mainly rely on the C-F bond on the side chain to protect the main chain, while the distribution of fluorine-containing groups in fluorine-containing acrylate is relatively scattered. It is difficult for the fluorine-containing groups to reach the surface of the coating film, which weakens the modification effect of the fluorine-containing groups, resulting in a relatively high cost of this type of coating, which will greatly affect the application of this type of coating

Method used

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  • Aqueous composite paint containing amphiphilic fluorine-containing acrylate blocking copolymer and preparation thereof
  • Aqueous composite paint containing amphiphilic fluorine-containing acrylate blocking copolymer and preparation thereof
  • Aqueous composite paint containing amphiphilic fluorine-containing acrylate blocking copolymer and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 10 parts of the first monomer methacrylic acid, 1 part of initiator ammonium persulfate, 4 parts of RAFT reagent 4-dithiobenzoic acid (4-cyanovaleric acid) ester and 50 parts of solvent water in a 100ml three-necked flask . Nitrogen was passed for 15 minutes, and then frozen in an ice-water bath. After repeated evacuation-nitrogen for 3 times, the tube was vacuum-sealed. Under magnetic stirring, react in an oil bath at 70°C for 6 hours to obtain a macromolecular RAFT reagent.

[0063] 100 parts of trifluoroethyl methacrylate as the second monomer, 0.2 parts of ammonium persulfate as the initiator and 200 parts of solvent water were continuously added to the above reactor. Nitrogen was passed for 15 minutes, and then frozen in an ice-water bath. After repeated evacuation-nitrogen for 3 times, the tube was vacuum-sealed. Under magnetic stirring, react in an oil bath at 70°C for 12 hours to obtain a fluorine-containing acrylate block copolymer emulsion.

[0064] Tak...

Embodiment 2

[0066] Add 10 parts of isobutyl methacrylate, 100 parts of hexafluorobutyl methacrylate, 2 parts of initiator potassium persulfate, 200 parts of solvent water and 2.5 parts of emulsifier ammonium lauryl sulfate into a 100 ml three-necked bottle. Nitrogen was passed for 15 minutes, and then frozen in an ice-water bath. After repeated evacuation-nitrogen for 3 times, the tube was vacuum-sealed. Under magnetic stirring, react in an oil bath at 70°C for 12 hours to obtain a fluorine-containing acrylate random copolymer emulsion.

[0067] Get 50 parts of fluorine-containing acrylate random copolymer emulsions, 50 parts of fluorine-containing acrylate block copolymers obtained in Example 1, 50 parts of titanium dioxide, 2 parts of defoaming agent silicone oil, 1 part of dispersant sodium acrylate, water 60 parts; Stir to mix evenly to obtain a composite coating. The post-test performance of the coating film is as follows: adhesion level 1, contact angle with water 94°, pencil hardn...

Embodiment 3

[0069] Add 15 parts of the first monomer hydroxyethyl methacrylate, 0.8 parts of the initiator 4,4'-azobis(4-cyanovaleric acid), and RAFT reagent 4-dithiobenzoic acid into a 100ml three-necked flask 4 parts of (4-cyanovaleric acid) ester and 100 parts of solvent water. Nitrogen was passed for 15 minutes, and then frozen in an ice-water bath. After repeated evacuation-nitrogen for 3 times, the tube was vacuum-sealed. React in an oil bath at 70° C. for 6 h under magnetic stirring to obtain a macromolecular RAFT reagent solution.

[0070] Continue to add 100 parts of the second monomer dodecafluoroheptyl methacrylate in the above-mentioned reactor, 0.5 parts of initiator 4,4'-azobis (4-cyanovaleric acid) and 150 parts of solvent water. Nitrogen was passed for 15 minutes, and then frozen in an ice-water bath. After repeated evacuation-nitrogen for 3 times, the tube was vacuum-sealed. React in an oil bath at 70° C. for 12 hours under magnetic stirring to obtain a fluorine-contain...

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Abstract

The invention relates to a water-based compound coating which contains amphiphilic fluorinated acrylate segmented copolymer. The water-based compound coating which contains amphiphilic fluorinated acrylate segmented copolymer is prepared by the following raw material with the following weight by parts, fluorinated acrylate segmented copolymer 0.1-100 parts, fluorinated acrylate random copolymer 0-100 parts, water 50-100 parts, inorganic salt filler 40-100 parts, defoaming agent 0.2-5 parts and dispersing agent 0.2-4 parts. The compound coating of the invention not only has the advantages of low production cost, high adhesive force, stain resistance and the like, but also has no organic solvent in the process of preparing and in end products, the coating is an environment-friendly product.

Description

technical field [0001] The invention relates to chemical coatings, in particular to a water-based composite coating containing an amphiphilic fluorine-containing acrylate block copolymer and a preparation method thereof. Background technique [0002] Since the 1990s, various countries have successively enacted laws and regulations to limit the VOC of coatings. In the long run, solvent-based coatings will gradually withdraw from the market, and water-based coatings will become the darling of the market. "Water-based" fluorocarbon coatings has become a serious problem faced by coating researchers, and the development of environmentally friendly and high-quality water-based fluorine-containing coatings is attracting great attention from all over the world, and it is an important direction for the future development of the coatings industry. At present, there are mainly two types of water-based fluorine coatings that have been applied in China, one is water-based fluorine coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/16C09D5/02C08F220/22C08F2/22C08F2/38
Inventor 刘伟区徐守萍
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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