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A kind of thermal insulation composite material and preparation method thereof

A composite material and composite molding technology, applied in the field of thermal insulation materials, can solve problems such as technical obstacles of room temperature vulcanized silicone rubber, and achieve the effects of simplified molding process, long operation time and soft material

Active Publication Date: 2022-03-18
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal conductivity of silicone rubber at room temperature is about 0.27 W / (m·℃), while the thermal conductivity of general-purpose thermal insulation materials is not greater than 0.23W / (m·℃). Obviously, there are technical obstacles in the use of room temperature vulcanized silicone rubber as a thermal insulation material.

Method used

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  • A kind of thermal insulation composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]By weight, 75 parts of α, ω-dihydroxy polydimethylsiloxane with a kinematic viscosity of 1000cst, 5 parts of simethicone oil with a kinematic viscosity of 50cst, 10 parts of aluminum hydroxide, and 20 parts of hollow glass microspheres 1. Mix 1 part of carbon black pigment in a planetary mixer, heat to 120°C at the same time, and knead for 3 hours in a vacuum drying environment of -0.1MPa to obtain the base material. After cooling to 50°C, slowly add 3 parts of aminopropyltrimethoxysilane , 3 parts of methyltriethoxysilane, 1 part of tetraisopropyl titanate mixed solution, continue to knead to form a completely uniform silicone rubber, set aside. Apply a layer of silicone rubber obtained above in the prefabricated molding tank, then put the glass fiber net into it, and then coat a layer of light silicone material, spread the surface evenly, leave it at room temperature for 24 hours to cross-link and form, take out the composite material, put it Into a 60 ° C oven for dee...

Embodiment 2

[0048] By weight, 75 parts of α, ω-dihydroxypolydimethylsiloxane with a kinematic viscosity of 1000cst, 5 parts of simethicone oil with a kinematic viscosity of 50cst, 10 parts of aluminum hydroxide, and 50 parts of hollow glass microspheres 1. Mix 1 part of carbon black pigment in a planetary mixer, heat to 120°C at the same time, and knead for 3 hours in a vacuum drying environment of -0.1MPa to obtain the base material. After cooling to 50°C, slowly add 3 parts of aminopropyltrimethoxysilane , 3 parts of methyltriethoxysilane, 1 part of tetraisopropyl titanate mixed solution, continue to knead to form a completely uniform silicone rubber, set aside. Apply a layer of silicone rubber obtained above in the prefabricated molding tank, then put the glass fiber net into it, and then coat a layer of light silicone material, spread the surface evenly, leave it at room temperature for 24 hours to cross-link and form, take out the composite material, put it Into a 60 ° C oven for dee...

Embodiment 3

[0050] By weight, 60 parts of α, ω-dihydroxypolydimethylsiloxane with kinematic viscosity of 20000cst, 15 parts of α, ω-dihydroxypolydimethylsiloxane with kinematic viscosity of 1000cst, 5 parts of kinematic Mix simethicone oil with a viscosity of 50cst, 10 parts of aluminum hydroxide, 50 parts of hollow glass microspheres, and 1 part of carbon black pigment in a planetary mixer, while heating to 120°C and kneading in a vacuum drying environment of -0.1MPa for 3 After cooling to 50°C, slowly add 3 parts of aminopropyltrimethoxysilane, 3 parts of methyltriethoxysilane, and 1 part of tetraisopropyl titanate mixed solution, and continue mixing to form a completely uniform Silicone rubber, spare. Apply a layer of silicone rubber obtained above in the prefabricated molding tank, then put the glass fiber net into it, and then coat a layer of light silicone material, spread the surface evenly, leave it at room temperature for 24 hours to cross-link and form, take out the composite ma...

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Abstract

The invention relates to a lightweight heat-insulating composite material, which is compounded and molded by silicone rubber and an inorganic fiber network. The silicone rubber is obtained by curing a silicone rubber precursor composition, and the silicone rubber precursor composition includes by weight: α,ω-dihydroxy polydimethylsiloxane 7-95 parts; dimethyl silicone oil 1-15 parts; light filler 10-500 parts; flame retardant filler 10-500 parts; crosslinking agent 1-15 parts 1-15 parts of coupling agent; 1-5 parts of catalyst; 1-2 parts of pigment. The lightweight heat-insulating composite material produced by the present invention can be formed at room temperature, solidified and cross-linked by moisture in the air, has low requirements on forming equipment, does not need heating and cooling to save energy, and simplifies the forming process. The beads reduce the density of the composite while improving its thermal insulation properties. The invention takes the inorganic fiber net as the skeleton and has high strength, and the addition of the inorganic fiber net further enhances the thermal insulation performance of the composite material.

Description

technical field [0001] The invention relates to the field of heat insulation materials, and relates to a lightweight heat insulation composite material and a preparation method thereof. Background technique [0002] Thermal insulation materials are widely used in various industries such as energy utilization, automobile manufacturing, national defense engineering, and chemical production due to their unique properties of heat preservation, heat insulation, and fire prevention, and are closely related to daily life. The use of heat insulation materials can effectively reduce heat loss and save fuel, and can also improve the working and living environment, ensure safe production and improve work efficiency. Therefore, the development of the thermal insulation material industry, especially the development and utilization of high-quality thermal insulation materials, has very important practical significance for the economic construction of our country. [0003] Currently, foam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/04C08K7/28C08K3/22C08K5/544C08K5/5419C08K5/10C08K7/14
CPCC08L83/04C08L2205/025C08L2201/08C08K2003/2227C08K2201/003C08K13/04C08K7/28C08K3/22C08K5/544C08K5/5419C08K5/10C08K7/14
Inventor 崔武林张刚何禄文
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD