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Protective coating for micro-arc oxidation and preparation method thereof

A technology of micro-arc oxidation and protective coating, applied in the direction of coating, etc., can solve the problems of high partial discharge spark temperature, high oxidation breakdown voltage, long processing cycle, etc., and achieve good adhesion, no leakage, and low cost Effect

Active Publication Date: 2019-11-15
西安强微电气设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of micro-arc oxidation, there are characteristics such as high oxidation breakdown voltage (the voltage of aluminum alloy can reach more than 650V), the solution is weak or strong alkaline, and the partial discharge spark temperature is high (about 2000 ° C or more), which makes the traditional anodic oxidation Or the electroplating protective coating cannot meet the requirements of use, and there are problems such as long processing cycle, over-protection, and high cost when using production tooling for protection

Method used

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  • Protective coating for micro-arc oxidation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of base resin

[0049] Pour 6% polyisobutylene and 15% SBS resin into their respective reaction kettles, respectively add 34% dimethyl carbonate and 45% butyl acetate for soaking, stir until evenly mixed, and obtain the base Material resin, spare;

[0050] (2) Preparation of modified silicone resin

[0051] Mix 98% of dihydroxy polydimethylsiloxane and 2% of silane coupling agent at 80°C and -0.1MPa vacuum for 60 minutes and then cool it down to room temperature to obtain a modified silicone resin. ;

[0052] Among them, the viscosity of dihydroxypolydimethylsiloxane is 5000mPa.S; the silane coupling agent is an aminosilane coupling agent.

[0053] (3) Add 44% base material resin into the movable tank, then add 8% modified silicone resin, 8% flame retardant, 2.7% fumed silica, and 0.6% dimethyl Base silicone oil, 0.3% defoamer, 1.5% color paste and 34.9% solvent are mixed, and a high-speed mixer is used to stir it evenly to obtain a mixed material;

...

Embodiment 2

[0057] (1) Preparation of base resin

[0058] Pour 8% polyisobutylene and 20% SBS resin into their respective reaction kettles, respectively add 30% dimethyl carbonate and 42% butyl acetate for soaking, stir until evenly mixed, and obtain the base Material resin, spare;

[0059] (2) Preparation of modified silicone resin

[0060] Mix 95% dihydroxy polydimethylsiloxane and 5% silane coupling agent at 120°C and -0.09MPa vacuum conditions for 30 minutes, then cool down to room temperature to obtain a modified silicone resin. ;

[0061] Among them, the viscosity of dihydroxypolydimethylsiloxane is 8000mPa.S; the silane coupling agent is vinyl silane coupling agent.

[0062] (3) Add 48% base material resin into the movable tank by mass percentage, then add 6% modified silicone resin, 7% flame retardant, 3% fumed silica, 0.3% dimethyl Base silicone oil, 0.4% defoamer, 2% color paste and 33.3% solvent are mixed, and a high-speed mixer is used to stir it evenly to obtain a mixed m...

Embodiment 3

[0066] (1) Preparation of base resin

[0067] Pour 7% polyisobutylene and 18% SBS resin into respective reaction kettles, respectively add 32% dimethyl carbonate and 43% butyl acetate for soaking, stir until evenly mixed, and obtain base Material resin, spare;

[0068] (2) Preparation of modified silicone resin

[0069] Mix 96% of dihydroxypolydimethylsiloxane and 4% of silane coupling agent at 100°C and -0.09MPa vacuum for 40 minutes and then cool it down to room temperature to obtain a modified silicone resin. ;

[0070] Among them, the viscosity of dihydroxypolydimethylsiloxane is 10000mPa.S; the silane coupling agent is propionyloxysiloxane.

[0071] (3) Add 46% base material resin into the movable tank, then add 7% modified silicone resin, 8% flame retardant, 3.6% fumed silica, 0.45% dimethyl Base silicone oil, 0.5% defoamer, 1.8% color paste and 32.65% solvent are mixed, and a high-speed mixer is used to stir it evenly to obtain a mixed material;

[0072] Among them...

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Abstract

The invention discloses a protective coating for micro-arc oxidation and a preparation method thereof. The preparation method comprises steps of firstly preparing a base resin; preparing a modified organic silicon resin; adding the base resin in a movable tank, and then successively adding the modified organic silicon resin, a flame retardant, fumed silica, dimethyl silicone oil, a defoamer, colorpaste and a solvent for mixing, stirring the mixture evenly by a high-speed mixer to obtain a mixed material; grinding the mixed material by a sand mill until fineness of the mixed material is below30 [mu]m, and finally obtaining the protective coating for micro-arc oxidation. The protective coating for micro-arc oxidation prepared by the invention has characteristics of curability at low temperature, good adhesion to valve metals and alloys thereof, acid and alkali resistance, and good protection during micro-arc oxidation, as well as simple process and low cost.

Description

technical field [0001] The invention belongs to the technical field of micro-arc oxidation film layer protection, and relates to a protective coating for micro-arc oxidation, and also relates to a preparation method of the coating. Background technique [0002] Micro-arc oxidation (MAO-Microarc Oxidation) is a new technology for in-situ growth of ceramic layers on the surface of aluminum, magnesium, titanium, zirconium, tantalum, niobium and other valve metals and their alloys. The ceramic film layer prepared by this technology on the metal surface has excellent comprehensive properties such as high hardness, wear resistance, corrosion resistance, and insulation, and is widely used in aviation, aerospace, navigation, machinery, electronics, decoration, transportation, textiles and other fields. [0003] The micro-arc oxidation ceramic layer has insulating properties, and many electronic products require corrosion resistance and wear resistance as well as conductive propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D153/02C09D123/20C09D183/04C09D7/61C09D5/20
CPCC08K2003/2224C08K2003/3045C08K2003/387C08L2205/025C08L2205/035C09D5/20C09D153/02C09D7/61C09D7/70C08L23/22C08L83/04C08K13/04C08K7/26C08K3/38C08K3/346C08K3/30C08K3/22C08K7/24C08K3/2279
Inventor 陈鼎李均明
Owner 西安强微电气设备有限公司
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