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Insulating coating for titanium alloy surface insulating protective layer, and preparation method of insulating coating

A technology of insulating protection and insulating coatings, applied in the field of coatings, can solve problems such as mechanical properties that cannot meet the requirements, and achieve the effects of improving interface bonding, reducing costs, and excellent insulation resistance

Inactive Publication Date: 2017-09-08
俞秀英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN103571301A discloses a high-bonding-strength insulating paint for the insulating protective layer on the surface of titanium alloys, which consists of two components: a high-bonding-strength insulating paint and a paint curing agent, and the paint curing agent is a polyamide curing agent with high bonding strength. Insulating coatings are composed of film-forming resins, toughening modifiers, adhesion promoters, defoamers, leveling agents, organic soils, fumed silica, conventional coloring pigments and fillers, and conventional organic solvents. The toughening modification The agent is the reaction product of nitrile rubber, epoxy resin mixture and triphenylphosphine; mix the high bonding strength insulating paint and paint curing agent evenly according to the ratio, and apply it to the titanium alloy by spraying, brushing or rolling. Surface, drying and curing at room temperature for 7 days, that is, a high bonding strength insulating protective coating film is obtained on the surface of the titanium alloy. When the thickness of the coating film is 50 μm, the bonding strength between the film layer and the titanium alloy substrate is ≥13MPa, and the insulation resistance is ≥1011Ω, which can effectively realize the titanium alloy. Insulation protection of alloys, but the mechanical properties still cannot meet the requirements in practical applications and need to be further improved

Method used

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  • Insulating coating for titanium alloy surface insulating protective layer, and preparation method of insulating coating
  • Insulating coating for titanium alloy surface insulating protective layer, and preparation method of insulating coating
  • Insulating coating for titanium alloy surface insulating protective layer, and preparation method of insulating coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1), prepare toughening modifier:

[0046] Mix 30 parts of nitrile rubber CTBN and 40 parts of epoxy resin E5140 parts by mass, heat to 80°C, and stir evenly; add 0.2 parts of triphenylphosphine to the evenly stirred mixture, heat to 120°C, react for 4 hours, and cool to obtain toughening modifier.

[0047] 2), preparation of group modifier:

[0048] Hydroxyapatite and cyclodextrin are dispersed in dimethyl sulfone, and the cyclodextrin dimethyl sulfone solution (wherein, the concentration of hydroxyapatite is 3mol / L; the concentration of cyclodextrin is 10mo / L), that is, the group modifier.

[0049] 3) Preparation of high bonding strength insulating coatings for the surface of titanium alloys:

[0050] In proportion, 60 parts of bisphenol A epoxy resin 6101 film-forming resin, 50 parts of group modifier, 20 parts of the above-mentioned toughening modifier, and 3 parts of epoxy group silane coupling agent KH-560 adhesion promoter , 0.3 parts of modified polysiloxane D...

Embodiment 2

[0054] 1), prepare toughening modifier:

[0055] Mix 50 parts of nitrile rubber CTBN and 160 parts of epoxy resin E5160 parts by mass, heat to 80°C, and stir evenly; add 0.6 parts of triphenylphosphine to the evenly stirred mixture, heat to 120°C, react for 4 hours, cool to obtain toughness modifier.

[0056] 2), preparation of group modifier:

[0057] Hydroxyapatite and cyclodextrin are dispersed in dimethyl sulfone, and the cyclodextrin dimethyl sulfone solution (wherein, the concentration of hydroxyapatite is 5mol / L; the concentration of cyclodextrin is 8mo / L), that is, the group modifier.

[0058] 3) Preparation of high bonding strength insulating coating paint for titanium alloy surface:

[0059] In proportion, 90 parts of bisphenol A epoxy resin 6101 film-forming resin, 30 parts of group modifier, 40 parts of toughening modifier prepared as above, and 8 parts of aminosilane coupling agent KH-550 adhesion promoter , 0.8 parts of modified polysiloxane Defom5500 defoam...

Embodiment 3

[0063] 1), prepare toughening modifier:

[0064] Mix 40 parts of nitrile rubber CTBN and 515 parts of epoxy resin E515 parts by mass, heat to 80°C, and stir evenly; add 0.5 part of triphenylphosphine to the evenly stirred mixture, heat to 120°C, react for 4 hours, cool to obtain toughness modifier.

[0065] 2) Preparation of group modifier:

[0066] Disperse hydroxyapatite and cyclodextrin in dimethyl sulfone, and ball mill the cyclodextrin dimethyl sulfone solution (wherein the concentration of hydroxyapatite is 4mol / L; the concentration of cyclodextrin is 8.5mo / L), that is, the group modifier.

[0067] 3), preparation of titanium alloy surface with high bonding strength insulating paint paint:

[0068] In proportion, 70 parts of bisphenol A epoxy resin 6101 film-forming resin, 40 parts of group modifier, 30 parts of the above-mentioned toughening modifier, 5 parts of aminosilane coupling agent KH-550 adhesion promoter, modified 0.6 parts of polysiloxane Defom5500 defoam...

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Abstract

The invention discloses insulating coating for a titanium alloy surface insulating protective layer. The insulating coating is prepared from two components, namely insulating coating with high bonding strength and a coating curing agent, wherein the insulating coating with high bonding strength is prepared from film-forming resin, a group modifier, a toughening modifier, an adhesive force accelerant, a defoaming agent, a flatting agent, organic soil, fumed silica, the conventional coloring pigment fillers and the conventional organic solvent; the toughening modifier is a reaction product of butyronitrile rubber, an epoxy resin mixture and triphenyl phosphine; an insulating protective coating film with high bonding strength is obtained by mixing the insulating coating with high bonding strength and the coating curing agent uniformly, coating the surface of titanium alloy with the mixture, and drying and curing at room temperature; and the specific group modifier is added, so the mechanical properties of insulating products can be synergistically improved, the bonding strength of the film layer and the titanium alloy base material is more than or equal to 40 MPa and the insulating resistance is more than or equal to 5*1012 ohms when the thickness of the coating film is 50 microns, and insulating protection of the titanium alloy can be effectively realized.

Description

technical field [0001] The invention belongs to the field of coatings and relates to an insulating coating used for an insulating protective layer on the surface of a titanium alloy. Background technique [0002] The existing titanium alloy has the advantages of low density, high specific strength, non-magnetic, non-toxic, strong corrosion resistance, etc., and has been increasingly widely used in many fields such as aviation, aerospace, chemical industry, petroleum, light industry, metallurgy, and power generation. It is a new type of structural material with development prospects. In actual use, due to considerations of performance, cost and other factors, titanium alloys are more or less used in contact with other dissimilar metals, but titanium alloys are high-potential metals. When used in contact with other low-potential metals, such as Aluminum, steel, etc., can easily cause galvanic corrosion of low-potential metals. Therefore, in many practical situations, titaniu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/25C09D7/12
CPCC09D163/00C08K2003/325C08L2205/025C08L2205/035C08L2205/06C09D5/00C08L9/02C08L63/00C08L5/16C08K13/06C08K3/346C08K3/36C08K3/32C08K5/50
Inventor 俞秀英
Owner 俞秀英
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