A kind of Teflon coating for coating porous medium surface and preparation method thereof

A porous medium, Teflon technology, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc. Incomplete and other problems, to achieve the effect of high practical value, increased uniformity, good water resistance

Active Publication Date: 2020-12-22
北京揽山环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing Teflon coating can only spray 200-mesh metal mesh at most. For smaller metal meshes, the mesh holes will be blocked by spraying materials or the coverage of the metal mesh wires will be incomplete, which will largely affect the quality of the metal mesh. Affect the filtration efficiency and filtration quality of metal mesh

Method used

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  • A kind of Teflon coating for coating porous medium surface and preparation method thereof
  • A kind of Teflon coating for coating porous medium surface and preparation method thereof
  • A kind of Teflon coating for coating porous medium surface and preparation method thereof

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preparation example Construction

[0026] In addition, in order to achieve the above object, the present invention also provides a kind of preparation method of above-mentioned Teflon coating, comprises the steps:

[0027] Step 1: Add pigments and fillers, water-based diluents, and dispersants to the disperser in sequence according to the weight percentage requirements, and stir (stirring speed 60-300r / min) to make it evenly mixed so that the particle size of the mixture is less than or equal to 10 μm, and then Filter with a filter screen of about 200 mesh to 500 mesh to obtain the paint pulp.

[0028] Step 2: In the stirring state (stirring speed 60-300r / min), add fluorocarbon emulsion and other various additives in sequence according to the weight percentage requirements, including wetting agent, film-forming additive, thickener, functional additive , PTFE micro-particles, after mixing evenly, the water-based fluorocarbon coating can be obtained. General condition PH value is 7-9.

[0029] Before use, accor...

Embodiment 1

[0032] The components and mass percentages of the Teflon coating used for spraying porous media provided in this embodiment are: 45% fluorocarbon emulsion, 30% pigment and filler, 0.3% wetting agent, 0.6% dispersant, and 2% coalescent %, thickener 1%, polytetrafluoroethylene particles 5%, functional additives 2%, water 14.1%. The fluorocarbon emulsion is a fluorine-containing acrylate emulsion (mass fraction is 75%, which is diluted with commercial finished thinner, and the thinner model is NY-200); the pigment and filler are rutile nano-TiO 2 , the particle size is 0.5 μm; the wetting agent is polydimethylsiloxane; the dispersant is carboxylic acid modified polyurethane; the film-forming aid is lauryl alcohol ester; the thickener is Hydroxyethyl cellulose; the functional additive is vinyltriethoxysilane; the water-based diluent is deionized water.

[0033]The preparation method comprises the following steps: adding pigments, fillers, dispersants, and water-based diluents int...

Embodiment 2

[0035] The components and mass percentages of the Teflon paint used for spraying porous media provided in this embodiment are: 50% fluorocarbon emulsion, 25% pigment and filler, 0.3% wetting agent, 0.5% dispersant, 5% film-forming aid %, thickener 1.5%, functional additive 2%, polytetrafluoroethylene microparticles 5%, water-based diluent 10.7%. Described fluorocarbon emulsion is fluorine-containing acrylate emulsion (mass fraction is 75%, adopts commercial product thinner to dilute, thinner signal is NY-200); Described pigment filler is rutile type nano-TiO 2 The wetting agent is polymethylalkylsiloxane; the dispersant is modified polyurethane; the coalescent is butanediol; the thickener is fumed silica and hydrophobic polyether compound, the ratio is 1:1; the functional auxiliary agent is propyltrimethoxysilane. The water-based diluent is water.

[0036] The preparation method comprises the following steps: adding pigments, fillers, dispersants, and water-based diluents in...

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Abstract

The invention provides teflon paint for coating the surface of a porous medium and a preparation method thereof. The paint is prepared from the following components in percentage by mass: 45% to 55% of fluorocarbon emulsion, 20% to 30% of pigment and filler, 0.3% to 0.5% of wetting agent, 0.5% to 1.5% of dispersant, 2% to 5% of film-forming aid, 1% to 2% of thickener, 1% to 2% of functional aid, 3% to 7.5% of polyfluortetraethylene microparticle and 5% to 15% of water-based thinner. The teflon paint prepared by the preparation method can form a uniform coating layer with a thickness less than10mum on the surface of the porous medium by utilizing spray coating or impregnation after being subjected to thinning treatment; and moreover, the problems of blockage and the like cannot be caused to a substrate medium. The polyfluortetraethylene microparticle can form a fiber structure through cooling after being roasted at a high temperature to improve the overall strength of the coating layerto further prolong the service life of the coating layer. The paint provided by the invention is good in film-forming performance, and is high in bonding strength with a substrate; the thickness of the coating layer is easy to control; the coverage is complete when the paint is spread on the porous medium; and the blockage rate is low.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a Teflon coating used for coating the surface of porous media such as metal nets and a preparation method thereof. Background technique [0002] Teflon coating is a coating based on fluororesin, which has excellent comprehensive properties, including: temperature resistance, chemical corrosion resistance, weather resistance, water resistance, stain resistance, etc. Therefore, Teflon coating is widely used in machinery, chemical industry, electronics, energy and other industries. The research and application of Teflon coating has also become a hot spot and key development direction in the coatings industry. [0003] The metal mesh sprayed with Teflon coating has good acid and alkali resistance and temperature resistance, as well as excellent non-stick and special separation performance. This kind of metal mesh is widely used as a filter material in the fields of petroleum, chem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/16C09D127/18C09D5/16C09D7/63C09D7/65C09D7/61
CPCC08K2003/2241C08K2201/011C08L2205/035C09D5/1668C09D5/1687C09D133/16C08L27/18C08L83/04C08L75/04C08K13/02C08K5/5425C08K3/22C08K5/5419
Inventor 王宝邢兵赵浩毛海欣
Owner 北京揽山环境科技股份有限公司
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