Indoor-temperature curing flame-retardant silicone sealant

A silicone sealant, room temperature curing technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of failing to meet the flame retardant requirements, poor performance of sealants, etc., and achieve good elasticity , good adhesion, good storage stability

Inactive Publication Date: 2018-11-13
芜湖市颂晖商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealant needs to be filled with a large amount of flame retardant, otherwise it will not meet the flame retardant requirements, and a large amount of flame retardant filling will cause the performance of the sealant to deteriorate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A room temperature curing flame retardant silicone sealant, calculated in parts by weight, comprising the following components:

[0027] 75 parts of hydroxyl-terminated polydimethylsiloxane, 21 parts of methyl silicone oil with a viscosity of 300 lipoise, 40 parts of filler, 6 parts of methyltrimethoxysilane, 6 parts of flame retardant, γ-aminopropyl trimethicone 7 parts of ethoxysilane and 1.6 parts of dibutyltin dilaurate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 12:1.

[0028] The preparation method of flame retardant is:

[0029] In octane, add nano-scale magnesium aluminum hydrotalcite and polyaspartic acid and stir to mix, then raise the temperature to 80°C, then add titanate and stir for 5 hours, cool down to 55°C, then add diethyl chlorophosphite and calcium carbonate Reaction 6h, you can. The mass ratio of nanoscale magnesium aluminum hydrotalcite to polyaspartic acid is 35:1, t...

Embodiment 2

[0031] A room temperature curing flame retardant silicone sealant, calculated in parts by weight, comprising the following components:

[0032] 65 parts of hydroxyl-terminated polydimethylsiloxane, 15 parts of alkoxy silicone oil with a viscosity of 100 lipoise, 50 parts of filler, 2 parts of ethyltrimethoxysilane, 4 parts of flame retardant, γ-aminopropyl 1 part of triethoxysilane and 0.1 part of dibutyltin silicate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 9:1. The silicone crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0033] The preparation method of flame retardant is:

[0034] In cyclohexane, add nano-sized magnesium aluminum hydrotalcite and polyaspartic acid to stir and mix, then raise the temperature to 70°C, then add titanate and stir for 6 hours, cool down to 50°C, then add diethyl chlorophosphite and carbonic acid Calcium reaction 8h, you can. T...

Embodiment 3

[0036] A room temperature curing flame retardant silicone sealant, calculated in parts by weight, comprising the following components:

[0037] 85 parts of hydroxyl-terminated polydimethylsiloxane, 25 parts of white oil with a viscosity of 200 lipoise, 30 parts of filler, 7 parts of ethyltrimethoxysilane, 7 parts of flame retardant, γ-(methacryloyl 10 parts of oxy)propyl trimethoxy silicon and 3 parts of dibutyl tin diacetate. The filler is a mixture of fumed silica and organic bentonite, and the mass ratio of fumed silica to organic bentonite is 10:1. The silicone crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0038] The preparation method of flame retardant is:

[0039] In acetone, add nano-sized magnesium aluminum hydrotalcite and polyaspartic acid to stir and mix, then raise the temperature to 90°C, then add titanate and stir for 3 hours, cool down to 60°C, then add diethyl chlorophosphite and calcium carbonate to react 4 hours, that...

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PUM

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Abstract

The invention provides an indoor-temperature curing flame-retardant silicone sealant which comprises, by weight, 65-85 parts of hydroxyl-terminated polydimethylsiloxane, 15-25 parts of plasticizers, 30-50 parts of fillers, 2-8 parts of organic silicon cross-linking agents, 1-10 parts of coupling agents, 4-8 parts of flame retardants and 2-8 parts of catalysts. The flame retardants are mainly prepared from nano-scale magnesia-aluminum hydrotalcite and polyaspartic acid in a modified manner. The indoor-temperature curing flame-retardant silicone sealant has good flame resistance and excellent adhesive properties.

Description

technical field [0001] The invention belongs to the technical field of building sealing materials, and in particular relates to a room temperature curing flame-retardant silicone sealant. Background technique [0002] Room temperature curing silicone sealant is a paste under the condition of isolating water vapor, and reacts and solidifies into an elastomer after meeting water at room temperature. Usually this composition is called RTV-1, which is widely used in the construction industry for sealing agents and adhesives. The basic silicone RTV-1 sealant contains: polysiloxane, plasticizer, reinforcing filler, crosslinking agent, coupling agent, catalyst. It can also contain colorants, thixotropic agents, flame retardants, etc. In many occasions, such as fire doors and windows, building fire partitions, electrical products, etc. The sealant is required to have the function of flame retardant and fire retardant. [0003] The fire and flame retardant function of the sealant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06C09J11/08
CPCC08K2003/265C08K2201/011C08L2201/02C08L2205/025C09J11/04C09J11/06C09J11/08C09J183/04C08L91/06C08L83/04C08L79/08C08K13/06C08K3/36C08K3/346C08K9/04C08K5/5419C08K3/26
Inventor 汪泽维汪鹏
Owner 芜湖市颂晖商贸有限公司
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