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Vinyl modified fluorocarbon resin, preparation method thereof, and corrosion-resistant coating and preparation method and application thereof

A kind of fluorocarbon resin and modified fluorocarbon technology, applied in the field of corrosion-resistant coatings and their preparation, vinyl-modified fluorocarbon resin and its preparation, which can solve the problems of poor weather resistance and poor corrosion resistance.

Inactive Publication Date: 2020-08-28
CHENGDU HONRE PAINT MAKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional metal protective coatings are mainly solvent-free epoxy, fluorocarbon coatings, chlorinated rubber coatings, perchlorethylene coatings, high chlorinated polyethylene coatings, chlorosulfonated polyethylene coatings, phenolic epoxy, phenolic vinyl coatings or Asphalt coatings are used for painting, but the weather resistance of solvent-free epoxy, novolak epoxy, phenolic vinyl coatings and asphalt coatings is poor; fluorocarbon coatings, chlorinated rubber coatings, perchlorethylene coatings, high chlorinated polyethylene coatings and chlorine Sulfonated polyethylene coatings are only suitable for environments with a pH value of 3 to 11, and have poor corrosion resistance under strong acid and strong alkali conditions

Method used

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  • Vinyl modified fluorocarbon resin, preparation method thereof, and corrosion-resistant coating and preparation method and application thereof
  • Vinyl modified fluorocarbon resin, preparation method thereof, and corrosion-resistant coating and preparation method and application thereof
  • Vinyl modified fluorocarbon resin, preparation method thereof, and corrosion-resistant coating and preparation method and application thereof

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[0034] The invention provides a preparation method of vinyl-modified fluorocarbon resin, which comprises the following steps: mixing vinyl monomer containing fluorine group, initiator and tetrafluoroethylene gas-phase monomer, and carrying out addition reaction to obtain ethylene Modified fluorocarbon resin.

[0035] The present invention has no special limitation on the preparation method of the fluorocarbon monomer containing perfluorinated groups, and the preparation method well known to those skilled in the art can be used. In the present invention, the vinyl group of the fluorine-containing group The preparation method of monomer preferably comprises the following steps:

[0036] (1) Mix perfluorooctanoic acid, thionyl chloride and N,N-dimethylformamide, and perform the first esterification reaction to obtain perfluorooctanoyl chloride;

[0037] (2) Mixing the perfluorooctanoyl chloride, ethanolamine and tetrahydrofuran for a second esterification reaction to obtain N-hy...

Embodiment 1

[0081] Preparation raw materials and manufacturers are:

[0082] Perfluorooctanoic acid Shanghai Sanaifu New Material Co., Ltd.;

[0083] Thionyl Chloride Nanjing Rundi Industrial Co., Ltd.;

[0084] β-hydroxyethyl methacrylate, 2,4-toluene diisocyanate, methyl methacrylate, ethyl acrylate and butyl acrylate, industrial grade, all produced by Sanki Chemical Co., Ltd.;

[0085] Ethanolamine, dibutyltin dilaurate, N,N-dimethylformamide, methyl isobutyl ketone, chloroform, ethanol, acetone, NaOH, ethylene acid monomer and azobisisobutyronitrile, analytically pure, from Chengdu Branch Produced by Long Chemical Co., Ltd.

[0086] Add 15g of perfluorooctanoic acid and 9g of thionyl chloride into a four-necked flask equipped with a thermometer, a stirrer and a reflux condenser, add 0.1g of N,N-dimethylformamide as a catalyst, and carry out esterification reaction at 85°C 1h, gas chromatograph analysis, reach the end point when there is a stable value; reduce excess thionyl chlorid...

Embodiment 2

[0091] The preparation method of the vinyl monomer of fluorine-containing group is identical with embodiment 1;

[0092] Add 300g of fluorine-containing group vinyl monomer and 180g of initiator into the reaction kettle with stirring and electric heating, and evacuate until the oxygen content-5 g / L, add 60g of tetrafluoroethylene gas-phase monomer to the reactor at one time, raise the temperature to 76°C, and react for 20h under stirring conditions. Vacuumize, replace with nitrogen, and discharge to obtain vinyl-modified fluorocarbon resin.

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Abstract

The invention relates to the technical field of protective coating, in particular to vinyl modified fluorocarbon resin, a preparation method thereof, corrosion-resistant coating, a preparation methodof the corrosion-resistant coating and application of the corrosion-resistant coating. The preparation method of the vinyl modified fluorocarbon resin provided by the invention comprises the followingsteps: mixing a vinyl monomer containing a fluorine group, an initiator and a tetrafluoroethylene gas-phase monomer, and carrying out an addition reaction to obtain the vinyl modified fluorocarbon resin. Vinyl monomer resin containing fluorine groups is grafted with tetrafluoroethylene, so that the prepared vinyl modified fluorocarbon resin has excellent strong acid resistance, strong alkali resistance and excellent weather resistance; and the corrosion-resistant coating prepared by taking the vinyl modified fluorocarbon resin as matrix resin has excellent strong acid resistance, strong alkali resistance and weather resistance.

Description

technical field [0001] The invention relates to the technical field of protective coatings, in particular to a vinyl-modified fluorocarbon resin and a preparation method thereof, a corrosion-resistant paint, a preparation method and an application thereof. Background technique [0002] Petroleum, petrochemical, chemical synthesis, sewage treatment and chemical reagent transport vehicles and other fields will involve harsh environments with different pH values. When the pH value reaches below 3, it is a strong acid environment, and when the pH value exceeds 11, it is a strong alkaline environment. Under the environment conditions of strong acid and strong alkali, in order to protect the metal surface, the chemical resistance of the coating is very high. [0003] Traditional metal protective coatings are mainly solvent-free epoxy, fluorocarbon coatings, chlorinated rubber coatings, perchlorethylene coatings, high chlorinated polyethylene coatings, chlorosulfonated polyethylene...

Claims

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Application Information

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IPC IPC(8): C08F220/36C08F214/26C09D133/16C09D5/08C09D7/61C09D7/63C09D7/65B05D7/14
CPCC08F220/36C09D133/16C09D5/08C09D7/61C09D7/63C09D7/65B05D7/14C08K2201/011C08K2003/3045C08K2003/328C08F214/26C08L77/00C08K13/02C08K3/30C08K3/042C08K3/32C08K3/36C08K5/29C08K3/013C08G18/244C08G18/2885C08G18/8175C08G18/792C08G18/6279C08G2150/90C09D175/04C08G18/7621C08G18/6705C09D5/084C09D7/20C09D7/67C09D175/16C09D7/45C09D7/47
Inventor 江拥杨汝良杨飞尹迪蒋合兵熊林岳渊严光才
Owner CHENGDU HONRE PAINT MAKING CO LTD
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