Thermal protection organic coating and preparing method thereof

An organic coating and thermal protection technology, applied in coatings, fire-retardant coatings, etc., can solve the problems of pulverization, influence of temperature resistance of resin matrix, disintegration, etc., and achieve excellent mechanical properties and bonding properties, good bonding force, Solve the effect of easy poisoning

Active Publication Date: 2019-02-19
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, affected by the temperature resistance of the resin matrix, ordinary organic thermal protective coatings such as polyurethane thermal insulation coatings, acrylic thermal insulation coatings, etc. will disintegrate due to the cracking of the resin matrix at 300 °C
Some commonly used high-temperature heat-resistant coatings, such as epoxy resin heat-resistant coatings, silicone rubber heat-resistant coatings, etc., will crack, peel off, and pulverize after long-term use at 400 ° C, which will seriously affect the heat-resistant coating. layer reliability
Therefore, it is difficult for existing organic coatings to meet the long-term heat resistance requirements of 500°C at the kilosecond level

Method used

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  • Thermal protection organic coating and preparing method thereof
  • Thermal protection organic coating and preparing method thereof
  • Thermal protection organic coating and preparing method thereof

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preparation example Construction

[0058] Wherein, the silicone resin preparation method shown in formula (1) comprises:

[0059] Mix 20 parts by mass of tetraethyl orthosilicate, 10-20 parts by mass of water, and 80-90 parts by mass of ethanol evenly, add 0.5-1 part by mass of hydrochloric acid with a mass concentration of 37%, and react at 70°C-80°C for 30-40min , add 100-110 parts by mass of methylphenyldimethoxysilane, react at 70°C-80°C for 100-120min, add 5-6 parts by mass of divinyltetramethyldisiloxane, and react at 70°C-80°C The reaction was carried out for 100-120 minutes, the solvent was removed under reduced pressure, and ethyl acetate was added for extraction three times to obtain a silicone resin.

[0060] The porcelain-forming filler can be at least one of alumina, mica or titanium oxide, preferably alumina; the curing agent is preferably high hydrogen-containing silicone oil, and its molecular structure is as shown in formula (2):

[0061]

[0062] Wherein, n=3-10.

[0063] The preferred pl...

Embodiment 1

[0082] The present embodiment provides a thermal protection organic coating, comprising the following steps:

[0083] (1) Preparation of silicone resin:

[0084] Mix 20g of ethyl orthosilicate, 15g of water, and 85g of ethanol evenly, add 1g of hydrochloric acid with a mass concentration of 37%, react at 80°C for 30min, then add 100g of methylphenyldimethoxysilane, and react at 80°C for 120min , then add 5g of divinyltetramethyldisiloxane, react at 80°C for 120min, remove the solvent under reduced pressure, add ethyl acetate for extraction three times, and obtain a silicone resin with the molecular formula shown in formula (1), wherein, X = 10, y = 30; image 3 The silicone resin gel permeation chromatogram provided for the present embodiment;

[0085] (2) Preparation of high temperature resistant coatings:

[0086] Add 1 kg of the silicone resin prepared in step (1), 0.3 kg of alumina, 0.2 kg of white carbon black and 0.2 kg of glass fiber into the stirred tank, and grind ...

Embodiment 2

[0092] The present embodiment provides a thermal protection organic coating, comprising the following steps:

[0093] (1) Preparation of silicone resin:

[0094] Mix 20g of ethyl orthosilicate, 15g of water, and 85g of ethanol evenly, add 1g of hydrochloric acid with a mass concentration of 37%, react at 80°C for 30min, add 100g of methylphenyldimethoxysilane, and react at 80°C for 120min, Add 5g of divinyltetramethyldisiloxane, react at 80°C for 120min, remove the solvent under reduced pressure, add ethyl acetate for extraction three times, and obtain a silicone resin with the molecular formula shown in formula (1), where X=10 ,y=30;

[0095] (2) Preparation of high temperature resistant coatings:

[0096] Add 1 kg of the silicone resin prepared in step (1), 0.28 kg of alumina, 0.18 kg of white carbon black and 0.18 kg of glass fiber into the stirred tank, and grind 4 times with a three-roller mill to obtain a high temperature resistant coating.

[0097] (3) preparation ca...

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Abstract

The invention discloses a thermal protection organic coating and a preparing method thereof, and belongs to the field of thermal protection coatings. The thermal protection organic coating comprises,by mass, 150 parts of high-temperature-resistant paint, 18-22 parts of a curing agent and 0.8-1.2 parts of a catalyst. The high-temperature-resistant paint comprises, by mass, 100 parts of organic silicon resin, 28-32 parts of china filler. 18-22 parts of white carbon black and 18-22 parts of glass fiber. The organic coating has a ceramic reaction in the heated process to form a ceramic phase, andthe long-term heat protection under the kilosecond-scale hot environment of 500 DEG C is achieved.

Description

technical field [0001] The invention relates to a vitrified organic coating with a long-term resistance to 500°C and a preparation method thereof, which can be used as a thermal protection scheme for thermal protection of complex aircraft outer surfaces and engines, and belongs to the field of heat-resistant coatings. Background technique [0002] The reliability of the thermal protection system is one of the key factors determining the success or failure of an aircraft. With the development of aerospace technology, many products require long-term thermal protection on the order of thousands of seconds. Organic thermal protection coating has the characteristics of simple construction, room temperature curing, and low cost. It is one of the commonly used engineering solutions in the field of thermal protection. [0003] However, affected by the temperature resistance of the resin matrix, ordinary organic thermal protective coatings such as polyurethane thermal insulation coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09D183/05C09D7/61
CPCC08K2003/2227C09D5/18C09D7/61C09D183/04C08L83/04C08K7/14C08K3/36C08K3/22
Inventor 贺晨曾一兵高超尹雨晨李晨光左瑞霖范海波赵璐露王奥
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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