DA reaction-based fluorine-containing polyacrylate self-repairing coating and preparation method thereof

A technology of polyacrylates and acrylates, applied in the field of fluorine-containing polyacrylate self-repairing coatings and their preparation, to achieve the effects of wide sources, avoiding the use of a large amount of solvents, and the preparation method is green and environmentally friendly

Active Publication Date: 2020-01-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many researches on DA reaction in the preparation of recyclable thermosetting plastics, intelligent polymer materials, plastic cross-linked materials, self-healing polymer materials and heat-removable microcapsules. There are few reports on the preparation of self-healing fluorine-containing polyacrylates by introducing fluorine-containing polyacrylate materials

Method used

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  • DA reaction-based fluorine-containing polyacrylate self-repairing coating and preparation method thereof
  • DA reaction-based fluorine-containing polyacrylate self-repairing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Prepare mixed monomer and initiator aqueous solution

[0040] Weigh methyl acrylate, butyl acrylate, hexafluorobutyl methacrylate and furfuryl methacrylate according to the mass ratio of 26:104:9:1, and weigh the methyl acrylate, butyl acrylate and methyl acrylate. Hexafluorobutyl acrylate and furfuryl methacrylate are mixed uniformly to obtain a mixed monomer; weigh ammonium persulfate and deionized water at a mass ratio of 1:60 to prepare an initiator aqueous solution. The quality of the initiator is the monomer 0.5% of quality.

[0041] Step 2. Prepare seed emulsion

[0042] After obtaining the mixed monomer and initiator aqueous solution in step 1, weigh the amounts of polyacrylic acid-b-polyhexafluorobutyl acrylate, deionized water and sodium hydroxide according to the mass of the mixed monomers, where each composition is as follows:

[0043] The mass of polyacrylic acid-b-polyhexafluorobutyl acrylate is 6% of the mass of the mixed monomer;

[0044] The quality of ...

Embodiment 2

[0052] Step 1: Prepare mixed monomer and initiator aqueous solution

[0053] Weigh methyl methacrylate, butyl acrylate, hexafluorobutyl acrylate and furfuryl methacrylate according to the mass ratio of 39:91:15:4, and weigh the methyl methacrylate and butyl acrylate , Hexafluorobutyl acrylate and furfuryl methacrylate are mixed uniformly to obtain a mixed monomer; respectively weigh potassium persulfate and deionized water at a mass ratio of 1:30 to prepare an initiator aqueous solution. The quality of the initiator is the monomer 1.1% of quality.

[0054] Step 2. Prepare seed emulsion

[0055] After obtaining the mixed monomer and initiator aqueous solution in step 1, weigh the amounts of polyacrylic acid-b-polyhexafluorobutyl acrylate, deionized water and sodium bicarbonate according to the mass of the mixed monomers, where each composition is as follows:

[0056] The mass of polyacrylic acid-b-polyhexafluorobutyl acrylate is 4% of the mass of the mixed monomer;

[0057] The quality...

Embodiment 3

[0065] Step 1: Prepare mixed monomer and initiator aqueous solution

[0066] Weigh methyl methacrylate, butyl acrylate, hexafluorobutyl acrylate and furfuryl methacrylate according to the mass ratio of 78:54:21:7, and weigh the methyl methacrylate and butyl acrylate , Hexafluorobutyl acrylate and furfuryl methacrylate are mixed uniformly to obtain a mixed monomer; respectively weigh potassium persulfate and deionized water at a mass ratio of 1:30 to prepare an initiator aqueous solution. The quality of the initiator is the monomer 2.0% of quality.

[0067] Step 2. Prepare seed emulsion

[0068] After obtaining the mixed monomer and initiator aqueous solution in step 1, weigh the amounts of polyacrylic acid-b-polyhexafluorobutyl acrylate, deionized water and sodium bicarbonate according to the mass of the mixed monomers, where each composition is as follows:

[0069] The mass of polyacrylic acid-b-polyhexafluorobutyl acrylate is 5% of the mass of the mixed monomer;

[0070] The quality...

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Abstract

The invention discloses a preparation method of a DA reaction-based fluorine-containing polyacrylate self-repairing coating. The method comprises the following steps: preparing a mixed monomer and aninitiator aqueous solution; separately weighing polyacrylic acid-b-hexafluorobutyl polyacrylate, deionized water, and an alkali according to the mass of the mixed monomer, adding polyacrylic acid-b-hexafluorobutyl polyacrylate, deionized water, and the alkali into a reactor together with 25-30% of the mixed monomer, introducing argon and performing heating, and adding the initiator aqueous solution to prepare a seed emulsion; dropwise adding the remaining initiator aqueous solution and mixed monomer into the seed emulsion, and carrying out a reaction to obtain a furyl-containing fluorine-containing polyacrylate soap-free emulsion; and dissolving a maleimide-based crosslinking agent in an organic solvent and then performing uniform mixing with the furyl-containing emulsion, and coating thesurface of a substrate with the mixed solution for curing to form the self-repairing coating. The preparation method of the self-repairing coating is mild, and does not use a large amount of solvents.The self-repairing coating has good water and oil repellency and good self-repairing performance, and at the same time, the applicable substrate of the coating is wide.

Description

Technical field [0001] The invention relates to the technical field of polymer coatings, in particular to a fluorine-containing polyacrylate self-repairing coating based on DA reaction and a preparation method thereof. Background technique [0002] Fluorinated polyacrylate not only has excellent film-forming properties, adhesiveness and flexibility of polyacrylate, but also has good heat and chemical stability of fluoropolymer, excellent water and oil repellency and antifouling properties. It is widely used in leather, papermaking, textile, coating, national defense and military industry, medicine and other fields. At present, the research on fluorine-containing polyacrylic resin mainly focuses on the synthesis method, while the research on functional fluorine-containing polypropionate is less. In the process of processing and using fluorinated polyacrylate materials, it is unavoidable to be subjected to mechanical, ultraviolet radiation, etc., so that the interior and surface o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D7/63C08F220/18C08F220/14C08F220/24C08F220/32
CPCC09D133/062C09D133/16C09D7/63C08F220/18C08K5/3415
Inventor 周建华王雪丽陈宝峰李红
Owner SHAANXI UNIV OF SCI & TECH
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