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Mono-component room-temperature vulcanized silicone heat-insulation refractory sealant and preparation method thereof

A vulcanized silicone and sealant technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problem of inability to meet the requirements of flame retardancy and radiation resistance, poor fire resistance, flame retardancy and radiation resistance, and sealants Poor radiation resistance and other problems, to achieve the effect of superior thermal insulation performance, good flame retardancy and radiation resistance, and low production cost

Inactive Publication Date: 2012-06-27
TIANYUAN HUAWEI GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent literature discloses a silicone sealant, the patent name is "neutral silicone stone sealant and its manufacturing method", the patent number is "01107167.2", the silicone sealant has good adhesion, but Its fire and flame retardant properties and radiation resistance are poor
Such as carbon black, cerium hydroxide, aluminum hydroxide, manganese carbonate, etc., but its flame retardancy and radiation resistance still cannot meet the requirements
[0005] In order to solve the above technical problems, Chinese patent 2010105330974 discloses a document titled "A One-Component Room Temperature Vulcanized Silicone Thermal Insulation Fire-Resistant Sealant and Its Preparation Method". The single-component silicone is used together with other materials to improve sealing. The flame retardancy of the sealant, although the sealant improves the flame retardancy, its radiation resistance is still poor
In the prior art, in order to improve the radiation resistance of the sealant, anti-radiation agents are usually added, such as rare earth raw materials (cerium oxide, bismuth oxide, etc.), the above technology for preparing silicone glue not only increases the cost, but also causes the cost of rare earth raw materials. Waste, and the radiation resistance of the sealant is still poor

Method used

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  • Mono-component room-temperature vulcanized silicone heat-insulation refractory sealant and preparation method thereof
  • Mono-component room-temperature vulcanized silicone heat-insulation refractory sealant and preparation method thereof
  • Mono-component room-temperature vulcanized silicone heat-insulation refractory sealant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A one-component room temperature vulcanized silicone thermal insulation fire-resistant sealant, calculated in parts by weight: 90 parts of α, ω-dihydroxy polysiloxane, 20 parts of methyl silicone oil, 20 parts of hollow glass microspheres and ultrafine hydrogen 30 parts of alumina and 30 parts of nano-calcium carbonate were successively added to a vacuum mixer, and stirred for 6 hours at a vacuum degree of 0.06MPa, a stirring speed of 50rpm, and a temperature of 100°C; the base material was obtained, and the particle size of hollow glass beads was 10 μm. The wall thickness is 1 μm. The viscosity of methyl silicone oil is 800cp

[0029] At room temperature, add 1 part of the coupling agent γ-aminopropyltriethoxysilane, 2 parts of the catalyst dibutyltin dilaurate, and 10 parts of the cross-linking agent methyl tributylketoximosilane to the above-mentioned base material in a vacuum. Under the conditions of a temperature of 0.06MPa and a stirring speed of 50rpm, stir agai...

Embodiment 2

[0031] A one-component room temperature vulcanized silicone thermal insulation fire-resistant sealant, calculated in parts by weight: 100 parts of α, ω-dihydroxy polysiloxane, 30 parts of methyl silicone oil, 25 parts of hollow glass microspheres and ultrafine hydrogen 40 parts of magnesium oxide, 20 parts of silicon micropowder, under the conditions of vacuum degree of 0.07MPa, temperature of 120°C, and stirring speed of 30rpm, stirred for 5 hours; the base material was obtained, the particle size of hollow glass microspheres was 100 μm, the wall thickness was 2 μm, methyl The viscosity of silicone oil is 850cp

[0032] At room temperature, add 3 parts of the coupling agent γ-aminopropyltriethoxysilane, 3 parts of stannous octoate catalyst, and 15 parts of the crosslinking agent vinyl tributylketoximosilane to the above-mentioned base material in sequence, at a vacuum degree of 0.07 MPa, under the condition that the stirring speed is 40rpm, stir again, stir and react for 80 m...

Embodiment 3

[0034] A one-component room temperature vulcanized silicone thermal insulation and refractory sealant, calculated in parts by weight: 110 parts of α, ω-dihydroxypolysiloxane, 40 parts of methyl silicone oil, 50 parts of hollow glass microspheres and flame retardant 30 parts of superfine aluminum hydroxide and 10 parts of ammonium polyphosphate and pentaerythritol flame retardant, the stirring speed is 30 rpm, 30 parts of fumed white carbon black? ? ? Stir for 4 hours at a vacuum of 0.08 MPa, a temperature of 150° C., and a stirring speed of 30 rpm; the base material is obtained. The particle size of the hollow glass microsphere is 180 μm, the wall thickness is 3 μm, and the viscosity of the methyl silicone oil is 900 cp.

[0035] At room temperature, add 5 parts of the coupling agent γ-glycidyl etheroxypropyltrimethoxysilane, 5 parts of the catalyst dibutyltin diacetate, and 20 parts of the cross-linking agent phenyltributylketoximosilane to the base material in sequence. Un...

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Abstract

The invention relates to preparation of a mono-component room-temperature vulcanized silicone heat-insulation refractory sealant. The mono-component room-temperature vulcanized silicone heat-insulation refractory sealant is prepared by the following steps of: sequentially adding 90-110 parts of alpha, omega-dihydroxy polysiloxane, 20-40 parts of methyl silicone oil, 20-50 parts of hollow glass microbeads, 30-50 parts of flame retardant, and other fillers to a vacuum stirrer, and stirring at vacuum degree of 0.06-0.08MPa and temperature of 100-150 DEG C for 4-6h; and then sequentially adding 1-5 parts of coupling agent, 1-5 parts of catalyst and 10-20 parts of crosslinking agent to the base materials in the stirrer, and stirring at vacuum degree of 0.06-0.08MPafor 40-100min. The prepared sealant has good flame retardancy, flame resistance and heat-insulation performance and greatly increased radiation resistance, and is an excellent sealing block material for nuclear power and building industries.

Description

technical field [0001] The invention relates to a sealant and a preparation method thereof, in particular to a thermal insulation and fireproof sealant, which belongs to the technical field of fireproof materials. Background technique [0002] Due to the requirements of special environments, fireproof sealants must have high performance such as radiation resistance, ozone resistance, cold resistance, aging resistance, high temperature resistance, and flame retardancy. Although the existing sealants can meet the application requirements in some fields, they cannot meet the requirements of special environments, and cannot simultaneously have special properties such as flame retardancy, high temperature resistance, and radiation resistance. , fireproof performance, and also has high temperature and radiation resistant sealants to meet the application performance requirements in the fields of nuclear power, building fireproof sealing, cable through wall flame retardant sealing a...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/04C09J11/04C09K3/10
Inventor 孙和平孙延锋朱恩龙汤继俊袁建飞
Owner TIANYUAN HUAWEI GRP
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