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Amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating, and preparation and application of amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating

A water-based epoxy coating, reactive technology, applied in the field of polymer coatings, can solve the problems of poor compatibility between organic fluoropolymers and epoxy coatings, increased cost, and difficulty in realizing molecular compounding.

Active Publication Date: 2018-04-27
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the physical blending method has poor compatibility between organic fluoropolymers and epoxy coatings, phase separation occurs, and it is difficult to achieve molecular-level recombination; while adding small-molecule fluorine-containing reactive monomers, due to short fluorine-containing chains It is easy to be embedded, and it is difficult for the fluorine-containing groups to migrate to the surface of the material. To achieve the desired modification effect, it is necessary to add a large amount of fluorine-containing monomers, resulting in increased costs

Method used

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  • Amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating, and preparation and application of amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating
  • Amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating, and preparation and application of amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating
  • Amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating, and preparation and application of amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Preparation of hydrophilic polyether modified epoxy resin: 5 parts by mass of maleic anhydride, 54 parts by mass of polyethylene glycol monomethyl ether ((CH 3 O(CH 2 CH 2 O) n H), relative molecular mass 5000) and 60 mass parts of toluene mix, be warming up to 80 ℃, add 1 mass part of p-toluenesulfonic acid, stir and react for 7 hours, then add 25 mass parts of F-44 type novolac epoxy resin and 2 mass parts Tetrabutylammonium bromide was heated up to 100°C and stirred for 12 hours, and the solvent was distilled off under reduced pressure to obtain a hydrophilic polyether-modified epoxy resin;

[0060] (2) Preparation of amino-terminated reactive fluorine-containing prepolymer: Add 20 parts by mass of hexafluorobutyl methacrylate and 40 parts by mass of N,N'-dimethylformamide into a container, heat up to 60°C, add 1 part by mass of cysteamine hydrochloride, 0.6 part by mass of azobisisobutyronitrile, stirred and reacted for 8 hours, added triethylamine to make th...

Embodiment 2

[0063] (1) Preparation of hydrophilic polyether-modified epoxy resin: add 10 parts by mass of succinic anhydride and 30 parts by mass of polyoxyethylene monobutyl ether (polyethylene glycol monobutyl ether, relative molecular mass 600) to the container and 40 parts by mass of toluene, heated up to 80°C, added 1 part by mass of triethylamine, stirred and reacted for 7 hours, then added 25 parts by mass of E-51 type epoxy resin and 2 parts by mass of triphenylphosphine, heated to 100°C and stirred Reaction 12h, underpressure distillation removes solvent, obtains containing hydrophilic polyether modified epoxy resin;

[0064] (2) Preparation of amino-terminated reactive fluorine-containing prepolymer: Add 40 parts by mass of hexafluorobutyl methacrylate and 80 parts by mass of N,N'-dimethylformamide into a container, heat up to 60°C, add 4 parts by mass of mercaptoethylamine and 0.8 parts by mass of azobisisobutyronitrile were stirred and reacted for 9 hours, triethylamine was ad...

Embodiment 3

[0067] (1) Preparation of hydrophilic polyether-modified epoxy resin: add 10 parts by mass of phthalic anhydride, 40 parts by mass of polyoxyethylene polyoxypropylene monobutyl ether (relative molecular mass 2000) and 50 parts by mass in a container Parts by mass of toluene, heat up to 80°C, add 1 part by mass of dibutyltin dilaurate, stir and react for 7 hours, then add 25 parts by mass of F-51 type epoxy novolac resin and 2 parts by mass of triethylamine, heat up to 100°C Stirring and reacting for 12h, obtaining a hydrophilic polyether-modified epoxy resin after removing the solvent by distillation under reduced pressure;

[0068](2) Preparation of amino-terminated reactive fluorine-containing prepolymer: Add 30 parts by mass of hexafluorobutyl methacrylate and 60 parts by mass of N,N'-dimethylformamide into a container, heat up to 110°C, add 0.6 parts by mass of mercaptoethylamine and 0.1 parts by mass of azobisisobutyronitrile, stirred and reacted for 9 hours, added diisop...

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PUM

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Abstract

The invention belongs to the technical field of polymer coating, and discloses amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating, and preparation and applicationof the amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating. The amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating comprises, by weight, 100 parts of epoxy resin, 5-100 parts of modified epoxy resin with hydrophilic polyether, 0.1-40 parts of amine-terminated reactive fluorine-containing prepolymers, 8-100 parts of curing agents, 0.1-2.5 parts of accelerators, 0.1-1 part of leveling agents, 0.1-2.5 parts of defoaming agents, 0.1-2.5 parts of dispersing agents, 0-200 parts of fillers and 100-250 parts of water. The amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating, the preparation and the application have the advantages that films formed by the amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating are high in adhesion and hardness and good in acid and alkali resistance; components in the amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating are good in compatibility; the amine-terminated reactive fluorine-containing polymer modified waterborne epoxy coating can be used for coating metal components and electric components.

Description

technical field [0001] The invention belongs to the technical field of polymer coatings, and in particular relates to an amino-terminated reactive fluorine-containing prepolymer modified water-based epoxy coating and its preparation and application. technical background [0002] Epoxy resin coating has strong adhesion, small shrinkage, excellent chemical corrosion resistance, wear resistance and good insulation, so it is widely used in anti-corrosion, electromechanical industry, transportation and other fields. [0003] Waterborne epoxy resin refers to a stable dispersion system in which epoxy resin is dispersed in the dispersion medium with water as the continuous phase in the form of particles or droplets. Compared with traditional epoxy resins, water-based epoxy resins avoid environmental pollution and waste of resources caused by the use of organic solvents, can be cured at room temperature and in a humid environment, and the construction and operation properties are gre...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D133/16C08G81/00
CPCC08G81/00C08L2205/025C08L2205/035C09D163/00C08L33/16C08L63/00
Inventor 刘伟区石红义林展聪王政芳
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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