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Flame-retardant silicone adhesive and preparation method thereof

A technology of silicone glue and flame retardant, applied in the field of silicone glue, can solve the problems of lack of flame retardancy, harm to human body and environment, and decline in mechanical properties, and achieve small inherent mechanical properties, affordable price, and good applicability Effect

Active Publication Date: 2021-02-09
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary silicone adhesives used in most buildings do not have flame retardant properties. Ordinary silicone adhesives will decompose thermally when the temperature is above 200°C, and their mechanical properties will decline; when the temperature is higher, the colloid will become brittle and even burn, releasing A lot of heat and toxic fumes are emitted, which poses a serious safety hazard
At present, most of the flame-retardant silicone adhesives sold on the market are decarboxylated and deoxime-type. During the curing process of the colloid, strong irritating gases will be released, which is harmful to the human body and the environment.

Method used

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  • Flame-retardant silicone adhesive and preparation method thereof
  • Flame-retardant silicone adhesive and preparation method thereof
  • Flame-retardant silicone adhesive and preparation method thereof

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preparation example Construction

[0031] According to a second aspect of the present invention, there is provided a method for preparing a flame-retardant silicone glue, comprising the steps of:

[0032] Heat and disperse α, ω-dihydroxy polydimethylsiloxane, dimethyl silicone oil, flame retardant and inorganic filler under vacuum conditions, such as heating and dispersing under vacuum conditions in a double planetary mixer, and keep the vacuum degree -0.1 ~0.1MPa, temperature 100~110℃, high-speed dispersion stirring for 2~3 hours;

[0033] After lowering the temperature to room temperature, add crosslinking agent, coupling agent and catalyst, continue to disperse and stir for 20 to 30 minutes, and then discharge.

[0034] In a preferred embodiment of the present invention, when the added flame retardant is a composite flame retardant, the flame retardant is prepared by the following steps: aluminum hydroxide, magnesium hydroxide, aluminum hypophosphite, diethyl hypophosphite Several kinds of aluminum phosphat...

Embodiment 1

[0037] A kind of flame-retardant silicone glue, comprises the raw material of following mass parts:

[0038] 400 parts of α, ω-dihydroxy polydimethylsiloxane (2000 viscosity: 500000 viscosity = 5:1), 180 parts of dimethyl silicone oil (100 viscosity), 400 parts of flame retardant (aluminum hydroxide: hypophosphorous acid Aluminum: melamine cyanurate: zinc borate = 2:12:6:3), 200 parts of inorganic filler (heavy calcium carbonate: light calcium carbonate = 1:1), 20 parts of crosslinking agent (methyl triethyl Oxysilane), 10 parts of coupling agent (KH-550:KH-570=1:4), 1 part of catalyst (dibutyltin dilaurate).

[0039] The preparation method of above-mentioned flame retardant silicone glue, comprises the following steps:

[0040] (1) Add 400 parts of α, ω-dihydroxy polydimethylsiloxane, 180 parts of simethicone oil, 400 parts of fully mixed flame retardant, and 200 parts of inorganic filler into the double planetary mixer, turn on the vacuum and Heat and stir, keep the temper...

Embodiment 2

[0043] A kind of flame-retardant silicone glue, comprises the raw material of following mass parts:

[0044]α, ω-dihydroxy polydimethylsiloxane 400 parts (2000 viscosity: 50000 viscosity = 5: 1), 180 parts of dimethyl silicone oil (100 viscosity), 400 parts of flame retardant (aluminum hydroxide: hypophosphorous acid Aluminum: melamine cyanurate: zinc borate = 1:12:8:2), 250 parts of inorganic filler (light calcium carbonate), 25 parts of crosslinking agent (methyltriethoxysilane), 10 parts of coupling agent 1 part (KH-550: KH-570=1:4), 1 part of catalyst (dibutyltin dilaurate).

[0045] The preparation method of above-mentioned flame retardant silicone glue, comprises the following steps:

[0046] (1) Add 400 parts of α, ω-dihydroxy polydimethylsiloxane, 180 parts of dimethyl silicone oil, 400 parts of fully mixed flame retardant, and 250 parts of inorganic filler into the double planetary mixer, turn on the vacuum and Heat and stir, keep the temperature at 110° C., and dis...

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Abstract

The invention provides a flame-retardant silicone adhesive and a preparation method thereof. The flame-retardant silicone adhesive is prepared from the following raw materials in parts by mass: 350 to600 parts of alpha, omega-dihydroxy polydimethylsiloxane, 100 to 200 parts of simethicone, 300 to 600 parts of flame retardant, 100 to 300 parts of inorganic filler, 5 to 40 parts of cross-linking agent, 2 to 20 parts of coupling agent and 0.5 to 2 parts of catalyst. The flame-retardant silicone adhesive provided by the invention is a dealcoholized flame-retardant silicone adhesive, is safer andmore environment-friendly than decarboxylated and deoximated flame-retardant silicone adhesives, and can have good mechanical properties and excellent flame-retardant effect by adding a specific flameretardant and alpha, omega-dihydroxy polydimethylsiloxane in an appropriate proportion.

Description

technical field [0001] The invention belongs to the technical field of silicone glue, in particular to a flame-retardant silicone glue and a preparation method thereof. Background technique [0002] With the increasing awareness of fire protection in human society, many industries have formulated corresponding standards for fire protection requirements in their own fields. my country has also promulgated mandatory flame retardant regulations for certain industries. Taking the construction industry as an example: since July 1, 2008 From now on, newly built or rebuilt public places must use flame retardant products that meet the mandatory national standard "Requirements and Labeling of Flame Retardant Products and Their Components in Public Places". The flame retardancy of building materials has become an important requirement in people's daily production and life. Silicone glue is a sealant widely used in the bonding and sealing of building materials such as glass curtain wal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08L2201/02C08L2201/22C08L2205/03C08K2003/2227C08K2003/387C08K2003/265C08K2003/323C08L83/04C08K13/02C08K3/22C08K3/32C08K5/34928C08K3/38C08K3/26C08K5/5419C08K5/5313
Inventor 田志雄谌能办叶丹阳金凤陈克海何伟孟喜李凤宇
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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