A kind of heat-resistant coating and preparation method thereof

A technology of heat-proof coating and heat-proof coating, applied in the direction of coating, etc., can solve the problems of peeling, ablation, cracking, etc., and achieve the effect of excellent heat-proof performance, simple process and easy realization.

Active Publication Date: 2021-04-13
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To this end, a new type of high-shear-resistant, light-weight heat-resistant coating material has been developed to solve the problems of cracking, shedding and large ablation in the existing heat-resistant coating in high heat flux and strong aerodynamic shear environments, ensuring good aircraft performance. The aerodynamic shape provides technical support for the structural heat-resistant design of the new generation of missile weapons

Method used

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  • A kind of heat-resistant coating and preparation method thereof
  • A kind of heat-resistant coating and preparation method thereof
  • A kind of heat-resistant coating and preparation method thereof

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preparation example Construction

[0053] A kind of preparation method of high shear resistance lightweight heat-resistant coating of the present invention comprises the following steps:

[0054] (1) Mix and disperse vulcanized silicone rubber, reinforcing filler, high-temperature-resistant filler, reinforcing fiber, heat-insulating filler, crosslinking agent and thinner evenly to obtain heat-resistant coating A;

[0055] The mass ratio of each component is: 100 parts of room temperature vulcanized silicone rubber, 10 to 40 parts of reinforcing filler, 35 to 70 parts of high temperature resistant filler, 14 to 41 parts of reinforcing fiber, 16 to 52 parts of heat insulating filler, crosslinking agent 1.8 to 6.2 parts, 32 to 104 parts of diluent.

[0056] (2) Mix the catalyst and vinyl silicone oil at a mass ratio of 1:10-20, and stir evenly to obtain heat-resistant coating B.

[0057] (3) Use thinner to adjust the viscosity of heat-resistant coating A to 18-25s (coating 4 viscosity), according to the mass rati...

Embodiment 1

[0080] (1) Add 100g of vinyl-terminated methylphenyl silicone rubber and 10g of white carbon black to the material tank of the kneader, start the kneader and disperse for more than 5min at a speed of 500r / min until the mixture is translucent, Preparation of mixture A1;

[0081] (2) Add 10 g of zirconia powder, 20 g of zinc phosphate, and 5 g of yttrium oxide to mixture A1, and start the kneader to disperse for more than 10 minutes at a rotating speed of 500 r / min to obtain mixture A2;

[0082] (3) Add 20 g of glass fiber to mixture A2, and grind it 4 to 5 times on a three-roll mill to obtain mixture A3;

[0083] (4) Add 20g of hollow glass microspheres, 5g of cork powder, 2g of hydrogen-containing silicone oil, and 40g of xylene to mixture A3, and disperse for more than 5min at a speed of not less than 100r / min in a high-speed stirring method to obtain heat-resistant Coating A component;

[0084] (5) Take 10g of chloroplatinic acid and 100g of vinyl silicone oil, mix and sti...

Embodiment 2

[0090] (1) Add 100g of vinyl-terminated methyl silicone rubber and 20g of calcium carbonate to the material tank of the kneader, start the kneader and disperse for more than 5min at a speed of 500r / min until the mixture is uniform white paste transparent , to prepare mixture A1;

[0091] (2) Add 15 g of talcum powder, 15 g of zinc borate, and 10 g of iron oxide to mixture A1, and start the kneader to disperse for more than 10 minutes at a rotating speed of 500 r / min to obtain mixture A2;

[0092] (3) Add 20 g of chopped carbon fiber to the mixture A2, and grind it on a three-roll mill for 4 to 5 times to prepare the mixture A3;

[0093] (4) Add 15g of hollow glass microspheres, 5g of hollow phenolic microspheres, 4g of hydrogen-containing silicone oil, and 50g of butyl acetate into the mixture A3, and disperse for more than 5min at a speed of not less than 100r / min in a high-speed stirring method to prepare Obtain heat-resistant coating A component;

[0094] (5) Take 10g of ...

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Abstract

The invention relates to a heat-resistant coating and a preparation method thereof. The heat-resistant coating includes two components of a heat-resistant coating A and a heat-resistant coating B. The two components are mixed according to a certain ratio before spraying, wherein The raw materials of the heat-resistant coating A include vulcanized silicone rubber, reinforcing fillers, high-temperature-resistant fillers, reinforcing fibers, heat-insulating fillers, crosslinking agents and diluents, and the raw materials of the heat-resistant coating B include catalysts and vinyl silicone oils. Through a large number of tests, the reasonable dosage of each component and the optimization of the components are given. The prepared coating has excellent heat resistance, and has the characteristics of high shear resistance and light weight. Problems of cracking, shedding and large ablation in the heat flux and strong aerodynamic shear environment ensure the good aerodynamic shape of the aircraft and provide technical support for the structural heat protection design of the new generation of missile weapons.

Description

technical field [0001] The invention relates to a heat-resistant coating and a preparation method thereof, in particular to a preparation method of a silicone rubber-based heat-resistant coating material, which is used on the outer surface of an aerospace vehicle to resist aerodynamic heat during flight, The invention belongs to the technical field of heat-resistant coating materials. Background technique [0002] The new generation of missiles has the characteristics of high maneuverability, high speed, high precision, and strong combat capability. The thermal environment on the outer surface of the missile is even harsher, which is specifically manifested in higher heat flux density and stronger airflow shear force. This change has made the problem of heat protection on the outer surface of missile weapons more prominent. The existing mature coatings are mainly used for aerodynamic thermal protection in short-term, low-shear environments. Bubbles, shedding, and resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/07C09D7/61
CPCC08K2003/2244C08L2205/025C08L2205/035C09D183/04C09D7/61C09D7/70C08L83/04C08L97/02C08K7/14C08K3/22C08K7/28C08K13/04
Inventor 李晨光范海波卢鹉曾一兵贺晨高超
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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