Heat-insulation ablation-resistant maintainable repairing agent and coating dual-purpose slurry, preparation method and application

Abstract

The invention relates to a heat-insulating ablation-resistant maintainable repairing agent, coating dual-purpose slurry, a preparation method and application, and belongs to the technical field of coatings and repairing agents. The slurry comprises main components and an additive component, the main components comprise 40-60% of organic silicon resin and 40-60% of a high-temperature-resistant filler the additive component comprises a solvent, wherein the mass of the solvent accounts for 60%-70% of the mass of the main components, and the additive component can further comprise an auxiliary agent; the main components and the additive component are uniformly mixed to obtain the slurry; the slurry is applied to gaps, pits, damage and other defects needing to be repaired, and repairing of a defect-containing base body is completed after curing. And by brushing the slurry on a matrix, and curing, the coating is obtained. The slurry can be used for preparing coatings and repairing defects onthe surfaces of various substrates, has the effects of heat insulation and ablation resistance, remarkably improves the temperature resistance of the substrates, and can meet the requirements of aircraft thermal protection systems in the future for low-cost, heat-proof, ablation-resistant and maintainable repairing agents and coatings.

Description

technical field [0001] The invention relates to a heat-insulating, ablation-resistant and maintainable repairing agent and a coating dual-purpose slurry, a preparation method and an application thereof, which can be used for repairing, leveling and caulking in the maintenance process of various substrates, and can also be directly used for preparing durable The invention relates to a high-temperature heat-insulating coating, which belongs to the technical field of coating and repairing agent. Background technique [0002] With the development of reusable hypersonic vehicle technology, the development of reusable thermal protection system is of great significance. Heat-insulating, ablation-resistant and maintainable high-temperature-resistant protective coating technology provides technical support for high-performance reusable thermal protection systems. [0003] Traditional high temperature resistant thermal protective coatings are divided into two categories: inorganic an...

AI Technical Summary

Problems solved by technology

[0004] (1) The preparation process of the inorganic thermal protective coating requires high-temperature sintering, which leads to large residual thermal stress in the coating and makes it difficult to achieve large-area coating preparation;

[0005] (2) High cost;

[0006] (3) The coating density is high;

[0007] (4) The coating is brittle and the assembly process of the coated insulation tile is complex, easy to be damaged during assembly and service, and cannot be maintained;

[0008] (5) Poor compatibility between traditional coatings and substrates, etc.

[0009] Although organic high-temperature-resistant coatings are low in cost and have good compatibility with substrates, they need to be cured at high temperatures for a long time, the high-temperature residual carbon rate is low, and the heat-resistant temperature is below 600°C, which is difficult to meet the development needs of future reusable thermal protection systems.

At the same time, due to its greater brittleness and complex assembly process, the thermal protection system is easy to be damaged and unmaintainable due to bumps in the assembly process, which causes a great waste of resources and greatly increases the cost

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