Method for preparing mixed filler-modified heat-resistant anticorrosive coating

A technology of anti-corrosion coatings and mixed fillers, applied in the field of coatings, can solve problems such as pitting, damage to coating structure, and low dispersion of graphene

Inactive Publication Date: 2018-08-21
WUHU BAOYI AMUSEMENT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dispersion of graphene in the coating is low, and it is easy to agglomerate, produce pitting pits, and destroy the coating structure

Method used

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Examples

Experimental program
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Embodiment

[0024] A preparation method of a heat-resistant anticorrosion coating modified by a mixed filler, characterized in that, the following steps are carried out:

[0025] (1) Preparation of graphene-polypyrrole composite filler:

[0026] Add 0.3 kg of hydrochloric acid solution to 0.5 kg of graphene oxide powder, ultrasonically disperse for 1 h, then add 0.5 kg of polypyrrolidone, continue ultrasonically dispersing for 1 h, place in an ice-water bath, add 4 kg of pyrrole monomer liquid dropwise and magnetically stir for 1 h, Add the hydrochloric acid solution of ammonium persulfate dropwise, stir magnetically for 22h, let stand for 10h, wash with acetone and deionized water, and obtain graphene oxide-polypyrrole;

[0027] Sonicate the obtained graphene oxide-polypyrrole solution for 1 hour, adjust the pH to 10.5-11.5 with ammonia water, add 4 kg of hydrazine hydrate, stir for 40 minutes to mix, condense and reflux in an oil bath at 124-126°C for 24 hours, filter with suction, add ...

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Abstract

The invention discloses a method for preparing a mixed filler-modified heat-resistant anticorrosive coating. The method comprises the following steps: performing ultrasonic treatment on a graphene oxide-polypyrrole solution; regulating the pH; adding hydrazine to be stirred and mixed uniformly; condensing and refluxing in an oil bath; performing suction filtration; adding acetone and deionized water for centrifugal washing; drying to obtain a graphene-polypyrrole compound; stirring a barium sulfate suspension in a constant-temperature bath; adding a compound modifier to be stirred; filtering when the mixture is hot; drying, grinding and screening to obtain modified barium sulfate; drying calcium carbonate in a vacuum oven; adding a coupling agent; modifying calcium carbonate with a heatingdry method; drying talc powder in a hot air oven; adding an aluminate coupling agent; melting and blending at a high speed to prepare the coupled modified talc powder; uniformly mixing waterborne epoxy resin with deionized water; performing ultrasonic separation; adding the modified filler; mixing and ball-milling; ultrasonically stirring and dispersing uniformly; mixing with a waterborne epoxy curing agent; ultrasonically stirring; adding an emulsifying agent, a dispersing agent, a defoaming agent and a wetting agent; stirring and mixing uniformly to obtain the heat-resistant anticorrosive coating.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of a heat-resistant and anti-corrosion coating modified by mixing fillers. Background technique [0002] Traditional solvent-based anti-corrosion coatings have problems such as high porosity, poor hydrophobicity, and low coating strength. Doping nanoparticles in traditional coatings is a common method to reduce porosity, increase hydrophobicity, and improve coating strength. Graphene is a two-dimensional honeycomb carbon nanomaterial with large specific surface area, high density and chemical inertness, and has strong physical shielding performance against corrosive media. Doping graphene in organic coatings can effectively improve Corrosion resistance of coatings. However, graphene has low dispersion in coatings and is prone to agglomeration, resulting in pitting pits and destroying the coating structure. In order to improve the dispersibility of graphene, the pres...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/62C09D7/65
CPCC09D163/00C08K2003/265C08K2003/3045C08L2201/08C09D5/08C09D5/18C09D7/62C09D7/65C08L79/04C08K13/06C08K9/02C08K9/04C08K3/042C08K3/30C08K9/10C08K9/06C08K3/26C08K3/34
Inventor 张庆
Owner WUHU BAOYI AMUSEMENT EQUIP
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