High-temperature-resistant and flame-retardant organic silicon sealant for aircraft firewall

A technology of high temperature resistance and firewall, applied in the field of sealant, can solve the problems of incompetent flame retardant performance and the development limit of aerospace vehicles, and achieve the effects of excellent thermal insulation performance, high heat resistance and high rigidity

Active Publication Date: 2021-05-18
成都民航六维航化有限责任公司
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the advancement of aerospace technology, there are more prominent requirements for the flame retardancy and high temperature resistance of components in design. The working temperature (<200°C) and flame retardancy of the original sealant are no longer competent (resist The flame burning time cannot exceed 15min), for safety reasons, the development of aerospace vehicles is restricted

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-temperature-resistant and flame-retardant organic silicon sealant for aircraft firewall
  • High-temperature-resistant and flame-retardant organic silicon sealant for aircraft firewall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A ceramizable flame-retardant and high-temperature-resistant sealant, which consists of 10 parts of component A and 1 part of component B in parts by mass;

[0022] Component A is: monophenyl silica gel with 20% phenyl content (viscosity range 8000-20000cP), 40 parts; surface-treated basalt chopped yarn, 1.5cm in length, 10 parts (surface-treated with water-repellent The preparation process of basalt chopped strands is as follows: the basalt continuous long fiber is first drawn through a liquid tank filled with silane coupling agent, and then passed through a 10-meter drying tunnel with hot air at 80°C. The silane coupling agent includes KH550, KH560 and KH570, etc.); 20 parts of lanthanum oxide 800 mesh, 10 parts of cerium oxide 1250 mesh; glass powder 6 μm, 5 parts; surface-treated modified muscovite powder, 20 parts (prepared by surface-treated modified muscovite powder The modification process is as follows: add 100 parts of ordinary muscovite powder into a vacuum k...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-temperature-resistant and flame-retardant organic silicon sealant for an aircraft firewall, which is prepared from the following components in parts by mass: 10 parts of a component A and 1 part of a component B; wherein the component A comprises the following components in parts by mass: 40 parts of single phenyl silica gel with phenyl content of 20%, 10 parts of basalt chopped yarns subjected to surface treatment by a water repellent, 20 parts of lanthanum oxide, 10 parts of cerium oxide, 5 parts of glass powder, and 20 parts of white mica powder modified by surface treatment; the component B is prepared from the following components in parts by mass: 5 parts of trisilanol ethyl esterification polyhedral oligomeric silsesquioxane; 4 parts of tetraethoxysilane; and 0.2 part of dibutyltin dilaurate. The organic silicon sealant disclosed by the invention cannot penetrate after being burnt for 30 minutes by flame at 1100 DEG C, the heat insulation performance is excellent, the back temperature of a titanium alloy plate does not exceed 250 DEG C, the back temperature of an aluminum alloy plate does not exceed 200 DEG C, and the tensile strength is greater than 5 MPa after long-time thermal aging.

Description

technical field [0001] The invention belongs to the field of sealants, and relates to a high-temperature-resistant and flame-resistant organosilicon sealant for aircraft firewalls. [0002] technical background [0003] In order to isolate some potential flammable areas and protect places that may be subjected to extreme high temperatures, the design of firewalls is required for engines, auxiliary power equipment, and combustion pilots in aircraft, space capsules, and ships. Fire and flame retardant silicone sealant is an indispensable material in the structure of firewalls. The technical solutions at the present stage are all prepared by adding flame-retardant fillers, such as aluminum hydroxide, platinum compounds, melamine and other inorganic and organic flame retardants, through physical mixing. However, with the advancement of aerospace technology, there are more prominent requirements for the flame retardancy and high temperature resistance of components in design. The...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08K2003/221C08K2003/2213C08L2205/025C08L2201/08C08L2201/02C08L83/04C08K13/06C08K9/06C08K7/10C08K3/22C08K3/40C08K3/34C08K5/5415
Inventor 张东岳叶李薇罗淑文曾皓翔梅拥军谢麟孙传鹏周洪赵芯李文艳
Owner 成都民航六维航化有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products