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Preparation method of water-soluble polyaniline, water-soluble polyaniline-containing water-based high-temperature conductive primer for glass fiber reinforced plastics and preparation method thereof

A polyaniline and water-soluble technology, which is applied in the field of water-based high-temperature conductive primer and preparation of FRP, can solve the problems of poor adhesion, poor dispersion, and low painting rate of FRP, and improve flexibility and stone chip resistance. High self-condensation tendency, good wettability effect

Pending Publication Date: 2021-11-19
QINGYUAN SHICHUANG COATING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a preparation method of water-soluble polyaniline, a water-based high-temperature conductive primer for FRP containing water-soluble polyaniline and a preparation method thereof. Poor dispersion and easy agglomeration in water-based coatings. The conductive primer coating containing water-soluble polyaniline has conductive properties, and the topcoat can be sprayed by electrostatic coating to solve poor adhesion of FRP, low paint rate and peeling. paint technical problems, and at the same time obtain a water-based high-temperature conductive primer that is convenient for construction, water-resistant, heat-resistant, salt-spray resistant, and environmentally friendly

Method used

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  • Preparation method of water-soluble polyaniline, water-soluble polyaniline-containing water-based high-temperature conductive primer for glass fiber reinforced plastics and preparation method thereof
  • Preparation method of water-soluble polyaniline, water-soluble polyaniline-containing water-based high-temperature conductive primer for glass fiber reinforced plastics and preparation method thereof
  • Preparation method of water-soluble polyaniline, water-soluble polyaniline-containing water-based high-temperature conductive primer for glass fiber reinforced plastics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-3

[0072] A kind of water-soluble polyaniline is prepared by following steps:

[0073] S01. Dissolve o-nitrobenzoyl chloride in dichloromethane of equal mass, stir and control the stirring speed as shown in Table 2, then add ethanolamine and o-nitrobenzoyl chloride with 5% mass of o-nitrobenzoyl chloride successively Acyl chloride quality 10% triethylamine, room temperature reaction time as shown in Table 2, obtain residue through underpressure distillation, carry out column chromatography to residue, obtain N-(2-hydroxyethyl)-2-nitrobenzene Formamide;

[0074] S02. Mix tetrahydrofuran and deionized water A at a mass ratio of 1:1 to obtain a tetrahydrofuran solution for later use, mix iron powder and concentrated sulfuric acid at a mass ratio of 1:3 to obtain a first reaction solution for later use, and Concentrated hydrochloric acid and ammonium persulfate are mixed in a mass ratio of 1:2 to obtain a second reaction solution for later use;

[0075] S03. Dissolve N-(2-hydroxyet...

preparation example 4-5

[0081] A color paste prepared by the following steps:

[0082] S001. Add deionized water D into the mobile tank, start the disperser to stir and control the speed as shown in Table 3, and add water-based dispersant, defoamer A and thickener in sequence, and the dispersion time is shown in Table 3;

[0083] S002, continue to add pigments and fillers to the mobile tank, the dispersion time is as shown in Table 3, and the color paste is obtained;

[0084] S003. Transfer the color paste in the mobile tank to a grinder, grind the color paste for 2-10 passes, and control the fineness of the color paste to be less than 25 microns.

[0085] Content and processing parameters of each component in table 3-preparation example 4-6

[0086] project Preparation Example 4 Preparation Example 5 Deionized water D(g) 20 20 Water-based dispersant (g) 2 2 Defoamer A(g) 0.5 0.5 Thickener (g) 0.2 0.2 Pigment (g) 78 78 Stirring speed in S001 (rpm)...

Embodiment 1-4

[0089] A water-based high-temperature conductive primer for FRP containing water-soluble polyaniline is prepared by the following steps:

[0090] S1. Add the color paste into the cleaned mobile tank, start the disperser to stir and control the speed as shown in Table 4, then slowly add water-based acrylic modified polyester, water-based acrylic emulsion, saturated polyester resin, amino resin, sealant Isocyanate, adhesion promoter, cosolvent, water-soluble polyaniline, auxiliary agent and deionized water C, control the dispersion time as shown in Table 4, and mix uniformly to prepare the initial mixture;

[0091] S2, use filter cloth to filter and fill the initial mixture, the filter cloth has a filter aperture of 50 microns to 100 microns, to obtain a water-based high-temperature conductive primer;

[0092] Among them, the amino resin is formed by mixing methyl etherified amino resin and butylated amino resin in a mass ratio of (7-10): 3, and the methyl etherified amino resin...

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Abstract

The invention discloses a preparation method of water-soluble polyaniline, a water-soluble polyaniline-containing water-based high-temperature conductive primer for glass fiber reinforced plastics and a preparation method, and relates to the field of water-based high-temperature stoving varnish. The preparation method of polyaniline comprises the following steps: preparing N-(2-ethoxyl)-2-nitrobenzamide from o-nitrobenzoyl chloride, dichloromethane, ethanolamine and triethylamine; treating N-(2-ethoxyl)-2-nitrobenzamide by using iron powder, concentrated sulfuric acid and tetrahydrofuran to obtain N-(2-ethoxyl)-2-aminobenzamide; and then preparing the water-soluble polyaniline with o-aminothiophenol. The preparation method of the conductive primer comprises the step of mixing the water-based acrylic modified polyester, the water-based acrylic emulsion, the saturated polyester resin, the amino resin, the blocked isocyanate, the water-soluble polyaniline and the like to prepare the conductive primer. The solubility of polyaniline in the water-based conductive primer is improved, the conductive primer reduces the surface resistance of glass fiber reinforced plastic, electrostatic spraying of finish paint is achieved, and the painting rate is improved.

Description

technical field [0001] The invention relates to the technical field of water-based high-temperature baking varnish, in particular to a preparation method of water-soluble polyaniline, a water-based high-temperature conductive primer for FRP containing water-soluble polyaniline and a preparation method. Background technique [0002] FRP, also known as glass fiber reinforced composite plastic, is a composite material invented in the middle of the last century. It generally refers to the basic composition of glass fiber reinforcing agent and unsaturated polyester, epoxy resin and phenolic resin binder. A continuous profile with a specific cross-sectional shape that is pultruded by special equipment. Due to the different types of resins used, it is called polyester FRP, epoxy FRP and phenolic FRP. FRP has the characteristics of light weight, high strength, corrosion resistance, good electrical insulation performance, good heat insulation performance, high pressure resistance, lo...

Claims

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Application Information

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IPC IPC(8): C08G73/02C09D167/06C09D133/00C09D167/00C09D161/32C09D175/04C09D5/24C09D5/46
CPCC08G73/0266C09D167/06C09D5/24C08L33/00C08L67/00C08L61/32C08L79/02
Inventor 付长欣胡伟峰蔡心怡刘武何世祺廖军武黄成河郭鑫王俊鸿林伟文
Owner QINGYUAN SHICHUANG COATING TECH CO LTD
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