A polysilazane coating material, preparation method and application method

A polysilazane, coating material technology, applied in the coating, the device for coating liquid on the surface, the pretreatment surface, etc., can solve the problems of uneven film density and etching degree, etc., to prevent uneven film thickness , the effect of fast conversion process

Active Publication Date: 2021-07-27
福建恒晶新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for preparing a polysilazane coating material, aiming to solve the technical problems of uneven film density and etching degree obtained by existing coating materials

Method used

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  • A polysilazane coating material, preparation method and application method
  • A polysilazane coating material, preparation method and application method
  • A polysilazane coating material, preparation method and application method

Examples

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preparation example Construction

[0015] In the embodiment of the present invention, a method for preparing a polysilazane coating material is provided, which specifically includes:

[0016] Polysilazane solutions are obtained by known synthetic methods;

[0017] Diluting the polysilazane solution and adding an initiator to obtain a mixed solution;

[0018] The mixed solution was filtered through a filter to obtain a coating material.

[0019] The predetermined synthetic method for obtaining the polysilazane solution specifically includes:

[0020] Add dichlorosilane to pyridine and react at minus 10-2°C to form a white solid complex (SiH 2 Cl 2 -2C 5 h 5 N), continue to feed ammonia gas to react, control the introduction speed of ammonia gas in this process, to ensure that the temperature of the reaction system remains at about 0 ° C, carry out vacuum filtration after the end of the reaction, remove by-product ammonium chloride, and obtain poly Silazane pyridine solution;

[0021] The polysilazane pyri...

preparation example 1

[0031] Introduce 1000ml of dry pyridine in a 2-liter four-port glass reactor with a gas conduit, a condenser, and a stirrer. Under -5°C ice-cooling, introduce 103 grams of dichlorosilane to form a white solid complex (SiH 2 Cl 2 -2C 5 h 5 N). The reaction compound is introduced into the ammonia gas through the drying tube to react while stirring while continuing to cool. Control the ammonia gas introduction rate to ensure that the reaction temperature will not rise too much. Generally kept at about 0 ℃. A total of 103 grams of ammonia were introduced. After the reaction is completed, vacuum filtration is performed to remove the by-product ammonium chloride to obtain a polysilazane pyridine solution. Distilling the pyridine solution under reduced pressure and adding xylene to obtain a xylene solution of polysilazane. On the basis of the xylene solution, a butyl ether solvent is added for solvent replacement to obtain a polysilazane solution.

preparation example 2

[0033] Add the polysilazane pyridine solution obtained in Preparation Example 1 to a mixed solution of pyridine and xylene to obtain a solution with a solid content of 20%. Under a dry nitrogen stream, stir and heat at 110° C. for 10 hours, then distill under reduced pressure and solvent Replacement to obtain a high-component polysilazane solution.

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Abstract

The invention relates to the field of coating materials, in particular to a preparation method and an application method of a polysilazane coating material. The preparation method of the polysilazane coating material specifically includes: obtaining a polysilazane solution through a predetermined synthesis method; diluting the polysilazane solution and adding an initiator to obtain a mixed solution; The solution is filtered through a filter to obtain the coating material. By adding an initiator to the polysilazane solution, heating or light after coating will generate free radicals to promote the increase of the molecular weight of the resin and the hinge reaction to increase the molecular weight, making the conversion process faster, and curing the resin at low temperature to prevent the occurrence of film The problem of uneven thickness.

Description

technical field [0001] The invention relates to the field of coating materials, in particular to a polysilazane coating material, a preparation method and an application method. Background technique [0002] Polysilazane is a kind of inorganic and organic-inorganic hybrid polymer with Si-N as the main chain. Due to its special chemical structure, it can be converted into SiN, SiNO, silicon dioxide, or its compounds under high temperature conditions. It has a wide range of applications in high temperature protection of metals, oxidation resistance of carbon materials, surface coating of plastic films, and semiconductor insulating materials. [0003] In the prior art, after polysilazane is coated on the surface of metals and resins, it is catalyzed by an acidic active agent or an oxidizing agent such as hydrogen peroxide solution into a hydrophilic or hydrophobic coating mainly composed of silicon dioxide, which becomes an easy coating. Use for cleaning surface protection or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/16B05D3/02B05D3/06B05D7/24C08G77/62
CPCB05D3/0254B05D3/06B05D7/24B05D2518/10C08G77/62C09D7/00C09D183/16
Inventor 康文兵
Owner 福建恒晶新材料科技有限公司
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