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Inorganic silicon resin/basalt fiber composite high-temperature-resistant coating and preparation method thereof

A technology of inorganic silicone resin and high temperature resistant coating, applied in the direction of alkali metal silicate coating, anti-corrosion coating, fireproof coating, etc., can solve the problems of oligomer molecular weight uniformity, poor storage stability, limited application, etc. Stability, high modulus, good high temperature resistance

Pending Publication Date: 2022-03-04
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the problems of the molecular weight uniformity of the oligomers and poor storage stability of the existing inorganic silicone resin, its application in the field of high temperature resistant coating and aerospace composite materials is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The inorganic silicone resin / basalt fiber composite high temperature resistant coating is prepared through the following steps:

[0021] (1) Pour a certain amount of distilled water into the reactor, slowly add lithium hydroxide under stirring, adjust the pH value to 12, and stir evenly until the solution is transparent.

[0022] (2) Add lithium silicate aqueous solution (M=4.8) with a mass of 10% distilled water and silane coupling agent KH550 with a mass of 5% distilled water into the above solution, continue stirring at high speed for 20 minutes, heat up to 60°C, and keep warm for reaction After 1.5h, a modified inorganic silicone resin was obtained.

[0023] (3) The modified inorganic silicone resin obtained in step (2) is added to the mixing tank of the high-speed disperser, the disperser is turned on, the rotating speed is adjusted to 400r / min, and the quality of adding the fumed silica of 2% of the inorganic silicone resin is stirred until Disperse evenly.

[0...

Embodiment 2

[0028] The inorganic silicone resin / basalt fiber composite high temperature resistant coating is prepared through the following steps:

[0029] (1) Pour a certain amount of distilled water into the reactor, slowly add potassium hydroxide under stirring, adjust the pH value to 12, and stir evenly until the solution is transparent.

[0030] (2) Add a lithium silicate aqueous solution (M=4.8) with a mass of 30% distilled water and a silane coupling agent KH560 with a mass of 7% distilled water into the above solution, continue stirring at a high speed for 30 minutes, then raise the temperature to 70°C, and keep the temperature for reaction After 2h, a modified inorganic silicone resin was obtained.

[0031] (3) The modified inorganic silicone resin obtained in step (2) is added to the mixing tank of the high-speed disperser, the disperser is turned on, the rotating speed is adjusted to 500r / min, and the quality of adding the fumed silica of 5% of the inorganic silicone resin is s...

Embodiment 3

[0036] The inorganic silicone resin / basalt fiber composite high temperature resistant coating is prepared through the following steps:

[0037] (1) Pour a certain amount of distilled water into the reactor, slowly add lithium hydroxide under stirring, adjust the pH value to 12, and stir evenly until the solution is transparent.

[0038] (2) Add lithium silicate aqueous solution (M=4.8) with a mass of 40% distilled water and A151 with a mass of 10% distilled water to the above solution, continue high-speed stirring for 40 minutes, heat up to 80°C, and keep warm for 3 hours to obtain the improved solution. Non-toxic inorganic silicone resin.

[0039] (3) The modified inorganic silicone resin obtained in step (2) is added in the mixing tank of the high-speed disperser, the disperser is turned on, the rotating speed is adjusted to 600r / min, and the quality of adding the fumed silica that is 5% of the inorganic silicone resin is stirred until Disperse evenly.

[0040] (4) Gradual...

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Abstract

The invention discloses an inorganic silicon resin / basalt fiber composite high-temperature-resistant coating and a preparation method thereof. The preparation method comprises the following steps: firstly, taking a lithium silicate aqueous solution as a raw material, adding a silane coupling agent to prepare modified inorganic silicon resin, then sequentially adding a certain amount of fumed silica, basalt chopped fibers and high-temperature-resistant ceramic powder at different stirring speeds, and uniformly stirring to obtain the inorganic silicon resin / basalt fiber composite high-temperature-resistant coating. The coating is uniformly blade-coated on a base material such as a steel plate and the like to obtain an inorganic silicon resin / basalt fiber composite high-temperature-resistant coating layer. The preparation method disclosed by the invention is simple and easy to operate, and the prepared high-temperature coating has good high-temperature resistance, heat insulation, corrosion resistance, ablation resistance and the like, and can be used as a high-temperature-resistant and heat-insulation protective coating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an inorganic silicone resin / basalt fiber composite high temperature resistant coating and a preparation method thereof. Background technique [0002] With the continuous advancement of aerospace technology, the high temperature performance requirements of polymer matrix composites used in the aerospace field are also increasing. At present, high-temperature coating (>1000°C) and aerospace composite materials are in urgent need of coatings with properties such as high temperature resistance, heat insulation and corrosion resistance, and ablation resistance. Due to the problems of the molecular weight uniformity of oligomers and poor storage stability of the existing inorganic silicone resins, its application in the fields of high-temperature resistant coatings and aerospace composite materials is limited. In order to improve the uniformity and stability of the molecular weigh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/02C09D5/08C09D7/61
CPCC09D1/02C09D5/18C09D5/08C09D7/61C09D7/70
Inventor 王文忠于海峰孔祥骞
Owner PEKING UNIV
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