Low-temperature-curing and superhigh-temperature-resistant coating, and preparation method and application of coating
An ultra-high temperature and low temperature technology, applied in the field of materials, can solve the problems of poor coating adhesion, high temperature oxidation resistance, high thermal shrinkage rate, etc., and achieve excellent adhesion, ultra-low thermal expansion rate and low thermal expansion rate.
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[0035] Example 1
[0036] A low-temperature curing and ultra-high temperature resistant coating, the raw material of which is composed of the following components by mass percentage: 20% of hyperbranched polysilazaborane with a number average molecular weight of 2670 g / mol, a polydispersity coefficient of 1.53, and a particle size of 30% It is 100nm composite filler, 4% triethylamine, 40% petroleum ether, 1% dimethicone, 2% hexenyl bisstearamide, 3% polydimethylsiloxane , The total mass percentage of each raw material component is 100%;
[0037] Wherein, the composite filler is composed of the following components by mass percentage: 50% graphite powder, 5% zirconium silicate, 15% boron carbide, 10% boron nitride, 15% zirconium boride, 15% The total mass percentage of each raw material component is 100%;
[0038] Among them, the structure of the hyperbranched polysilazaborazane used is:
[0039]
[0040] The specific preparation steps are as follows:
[0041] Step 1. Synthesis of the...
Example Embodiment
[0049] Example 2
[0050] A low-temperature curing and ultra-high temperature resistant coating, the raw material of which is composed of the following components by mass percentage: 30% of hyperbranched polysilazaborane with a number average molecular weight of 2670g / mol, a polydispersity coefficient of 1.53, and a particle size of 30% 10nm composite filler, 3% dimethyl sulfide, 30% p-xylene, 3% dimethyl polysiloxane, 2% stearic acid monoglyceride, 2% polymethyl phenyl Siloxane, the total mass percentage of each raw material component is 100%;
[0051] Wherein, the composite filler is composed of the following components by mass percentage: 40% graphite powder, 10% zirconium silicate, 10% boron carbide, 15% boron nitride, 15% zirconium boride, 10% The total mass percentage of each raw material component is 100%;
[0052] Among them, the structure of the hyperbranched polysilazaborazane used is:
[0053]
[0054] The specific preparation steps are as follows:
[0055] Step 1 and step...
Example Embodiment
[0062] Example 3
[0063] A low-temperature curing and ultra-high temperature resistant coating, the raw material of which is composed of the following components by mass percentage: 20% of hyperbranched polysilazaborane with a number average molecular weight of 2670g / mol, a polydispersity coefficient of 1.53, and a particle size of 10% It is 1000nm composite filler, 6% palladium / carbon, 60% ethyl acetate, 2% dimethicone, 1% polyethylene glycol 400, 1% melamine formaldehyde resin, the quality of each raw material component The sum of the percentages is 100%;
[0064] Wherein, the composite filler is composed of the following components by mass percentage: 60% graphite powder, 10% zirconium silicate, 5% boron carbide, 5% boron nitride, 5% zirconium boride, 15% The total mass percentage of each raw material component is 100%;
[0065] Among them, the structure of the hyperbranched polysilazaborazane used is:
[0066]
[0067] The specific preparation steps are as follows:
[0068] Step...
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