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High-temperature-resistant insulation coating and preparation method and application thereof

A technology of insulating coating and high temperature resistance, applied in the field of materials, it can solve the problems of expensive spraying equipment, complicated process, and difficult to control defects.

Active Publication Date: 2019-10-25
北京和尔泰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sintering temperature of this method reaches 800°C, and there are process difficulties when it is applied to large parts
In addition, there are also high-temperature-resistant insulating coatings obtained by adding inorganic powder and aerogel to high-temperature-resistant insulating silicone resin and baking at 200°C. For example, Chinese invention patent CN104152890A provides a method for preparing thermal shock-resistant coatings on flexible metal parts. The method of high temperature resistant insulating coating, in order to achieve good adhesion of the coating to the substrate at high temperature, 600# sandpaper is required to polish the flexible nickel base strip of 50mm×10mm, but for workpieces with small cross-sections such as coils, It is difficult to rely on grinding to improve the process operation
Chinese invention patent ZL201510133719.7 discloses a method for preparing insulating coatings for superalloys. It adopts a deposition process to sequentially prepare Ti and Al metal layers on the surface of pretreated superalloys. After oxidation, the holes are sealed and deposited again. al 2 o 3 In order to achieve the effect of high temperature insulation, the process is complex and the scope of application is limited
Chinese invention patent ZL201110384151.8 discloses a method of preparing a high-temperature insulating coating on the surface of an electrical steel sheet by plasma high-temperature spraying, but this method must rely on expensive spraying equipment, and when processing workpieces such as wires with small cross-sections, Difficult to control defects

Method used

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  • High-temperature-resistant insulation coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Take by weighing 100 mass parts of polysilazane resin (OPZ108), adopt 25 mass parts of xylenes to dissolve it and prepare a polysilazane resin solution whose mass fraction is 80wt%, and weigh 10 mass parts of polysiloxane Resin, make it evenly mixed with polysilazane resin, set aside. Add 30 parts by mass of mica powder, 20 parts by mass of talc powder, 15 parts by mass of zirconium boride, 0.5 part by mass of wetting and dispersing agent, and 1 part by mass of anti-settling agent at a rotational speed of 500 r / min. Stir for 40 minutes, ball mill through a ball mill jar until the coating fineness is 35 μm, and set aside.

[0062] Apply it to the surface of a clean steel sheet (8cm*2cm*0.25cm) by spraying, dry in an oven at 160°C for 2 hours, and take it out to obtain a high temperature resistant insulating coating. The thickness of the coating is 30 μm, the adhesion is grade 0, the flexibility is grade 1, the impact resistance is 50kg cm, the dielectric constant in the...

Embodiment 2

[0065] Take by weighing 100 mass parts polysilazane resin (PSN1), adopt 25 mass parts xylenes to dissolve it, be mixed with the organopolysilazane resin solution that mass fraction is 80wt%, weigh 20 mass parts polysiloxane resin Oxane resin, make it evenly mixed with polysilazane resin, set aside. Add 10 parts by mass of titanium dioxide, 10 parts by mass of mica powder, 40 parts by mass of glass powder, 0.3 parts by mass of a wetting and dispersing agent, and 1 part by mass of an anti-settling agent at a rotational speed of 800 r / min. Stir for 30 minutes, ball mill through a ball mill jar until the coating fineness is 35 μm, and set aside.

[0066] Apply it to thin conductive wires by dip coating On the surface, dry it in an oven at 230°C for 2 hours, and take it out to obtain a high temperature resistant insulating coating. The thickness of the coating is 11μm, and the insulation voltage is 1000V;

[0067] After the coating was baked at 600°C for 2 hours, the thickness ...

Embodiment 3

[0069] Take by weighing 100 mass parts of polysilazane resin (PHPS), adopt 400 mass parts of toluene to dissolve, be mixed with the polysilazane resin solution that mass fraction is 20wt%, weigh the polysiloxane resin of 1 mass part, Mix it evenly with polysilazane resin and set aside. 20 parts by mass of fumed silica were added at a rotational speed of 500 r / min. Stir for 30min and set aside.

[0070] Apply it to thin conductive wires by dip coating On the surface, dry it in an oven at 200°C for 2 hours, and take it out to obtain a high temperature resistant insulating coating. The thickness of the coating is 1 μm, and the insulation voltage is 300V;

[0071] After the coating is baked at 500°C for 2 hours, the thickness of the coating remains unchanged and the insulation voltage is 200V. It shows that the thin coating still has excellent insulation after being baked at high temperature.

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Abstract

The invention discloses a high-temperature-resistant insulation coating and a preparation method and application thereof. Slurry for preparing the high-temperature-resistant insulation coating is at least prepared from the following components in parts by mass: (a) 100 parts of polysilazane resin, (b) 1-100 parts of polysiloxane resin containing active functional groups, (c) 5-100 parts of a filler, and (d) 0-10 parts of an assistant. By adopting the polysilazane resin as a primary film forming substance and adopting the polysiloxane resin containing the active functional groups as a secondaryfilm forming substance, the high-temperature-resistant property is ensured, and the coating also has good tenacity; the preparation method is simple and does not rely on special equipment; the temperature-resistant property of the high-temperature-resistant insulation coating prepared through the method can be appropriately adjusted according to actual needs so as to adapt to different application fields; and the preparation method is wide in application range and can be suitable for various insulation objects, strips, pipes, wires and the like.

Description

technical field [0001] The invention relates to a high-temperature-resistant insulating coating and its preparation method and application, and the invention belongs to the field of material technology. Background technique [0002] With the development of high-tech fields, high-power LEDs, high-temperature sensors, high-temperature-resistant motors and other fields have more and more urgent demands for high-temperature-resistant insulating coatings. Different application fields have different requirements for temperature resistance. For example, the high-power LED aluminum substrate requires a temperature resistance of insulating coating above 250°C. At present, there are mature coating solutions, but with the introduction of nano-silver paste technology , the requirement for the insulating coating reaches above 450°C, and the traditional insulating coating cannot meet the requirements; the high temperature sensor has higher requirements for the temperature resistance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D183/04C09D5/25C09D5/18C09D7/61
CPCC08K2003/2241C08K2003/282C08K2201/014C08L2205/02C09D5/00C09D5/18C09D7/61C09D183/08C08L83/04C08K3/34C08K3/38C08K3/40C08K3/22C08K3/36C08K13/02C08K3/28
Inventor 张宗波邹铭徐彩虹梁倩影王丹黄文文周晓龙
Owner 北京和尔泰新材料科技有限公司
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