Single-component dealcoholization-type flame-retardant room temperature vulcanized (RTV) silicone rubber sealant and preparation method thereof

A sealant and silicone rubber technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of poor heat resistance, no flame retardancy and anti-yellowing performance, so as to improve yellowing resistance, Effect of improving heat resistance and thixotropy

Active Publication Date: 2013-11-20
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the RTV silicone rubber sealant disclosed in the prior art does not involve its flame retardancy and anti-yellowing performance, and has poor heat resistance

Method used

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  • Single-component dealcoholization-type flame-retardant room temperature vulcanized (RTV) silicone rubber sealant and preparation method thereof
  • Single-component dealcoholization-type flame-retardant room temperature vulcanized (RTV) silicone rubber sealant and preparation method thereof
  • Single-component dealcoholization-type flame-retardant room temperature vulcanized (RTV) silicone rubber sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A one-component dealcoholized flame-retardant RTV silicone rubber sealant, the RTV silicone rubber sealant includes the following raw materials in parts by mass:

[0040]

[0041]

[0042] The α, ω-dihydroxy polydimethylsiloxane is α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity of 1500cps, and the dimethyl silicone oil is dimethyl silicone oil with a dynamic viscosity of 50cps Silicone oil, the nano-reinforcing filler is hydrophilic fumed silica, the flame-retardant filler is aluminum hydroxide and magnesium hydroxide, the hydroxyl scavenger is hexamethyldisilazane, and the coupling agent It is γ-aminopropyltriethoxysilane, and the crosslinking agent is ethyl orthosilicate.

[0043] The preparation method of the above-mentioned one-component dealcoholized type flame-retardant RTV silicone rubber sealant is as follows:

[0044] (1) Put the formulated amount of α, ω-dihydroxy polydimethylsiloxane, dimethyl silicone oil, nano-reinforcing filler, flame-...

Embodiment 2

[0047] A one-component dealcoholized flame-retardant RTV silicone rubber sealant, the RTV silicone rubber sealant includes the following raw materials in parts by mass:

[0048]

[0049]

[0050] The α, ω-dihydroxy polydimethylsiloxane is α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity of 50000cps, and the dimethyl silicone oil is dimethyl silicone oil with a dynamic viscosity of 5000cps Silicone oil, the nano-reinforcing filler is nano-calcium carbonate, the flame-retardant filler is magnesium hydroxide, the hydroxyl scavenger is hexamethyldisilazane, and the coupling agent is γ-aminopropyl triethyl A mixture of oxysilane and γ-(2,3-glycidoxy)propyltrimethoxysilane, the crosslinkers are n-methyltrimethoxysilane and diethylaminomethyltriethoxysilane mixture.

[0051] The preparation method of the above-mentioned one-component dealcoholized flame-retardant RTV silicone rubber sealant comprises the steps:

[0052] (1) Put the formulated amount of α, ω-dihydr...

Embodiment 3

[0055] A one-component dealcoholized flame-retardant RTV silicone rubber sealant, the RTV silicone rubber sealant includes the following raw materials in parts by mass:

[0056]

[0057]

[0058] The α, ω-dihydroxy polydimethylsiloxane is α, ω-dihydroxy polydimethylsiloxane with a dynamic viscosity of 26000cps, and the dimethyl silicone oil is dimethyl silicone oil with a dynamic viscosity of 3400cps Silicone oil, the nano-reinforcing filler is nano-zinc oxide, the hydroxyl scavenger is hexamethyldisilazane, and the coupling agent is γ-aminopropyltriethoxysilane and γ-(2,3 - a mixture of glycidoxy)propyltrimethoxysilane, said crosslinking agent being a mixture of ethyl orthosilicate, methyl orthosilicate and vinyltrimethoxysilane.

[0059] The preparation method of above-mentioned one-component dealcoholization type flame-retardant RTV silicone rubber sealant, described method comprises the steps:

[0060] (1) Put the formulated amount of α, ω-dihydroxy polydimethylsilo...

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Abstract

The invention relates to a single-component dealcoholization-type flame-retardant room temperature vulcanized (RTV) silicone rubber sealant and a preparation method thereof. A base material is obtained by dewatering and blending of 100 parts by mass of alpha, omega-dihydroxyl polydimethylsiloxane, 10-50 parts by mass of dimethicone, 80-150 parts by mass of a nanometer reinforced filler, 100-150 parts by mass of a flame-retardant filler and 0.5-5 parts by mass of a hydroxyl clearing agent in a power mixer at the temperature of 120-150 DEG C with the vacuum degree of 0.09-0.1 MPa for 60-240 min; and at the normal temperature, the base material is vacuumized to the vacuum degree of 0.09-0.1MPa, after 10 min of stirring, 1-15 parts by mass of a cross-linking agent is added, after 15 min-30 min of stirring under the vacuum condition, 0.5-4 parts by mass of a coupling agent is added, and after 10 min-30min of stirring under the vacuum condition, the base material can be packaged into a finished product.

Description

technical field [0001] The invention relates to the technical field of silicone rubber preparation, in particular to a one-component dealcoholized flame-retardant RTV silicone rubber sealant and a preparation method thereof. Background technique [0002] With the rapid development of electronics, construction and aviation industries, silicone room temperature vulcanized silicone rubber has been widely used in the industry due to its neutral properties, non-corrosiveness to substrates, non-toxicity, strong adaptability and low cost. And the favor of researchers and get rapid development. At the same time, one-component room temperature vulcanized silicone rubber (RTV), that is, it can be cured at room temperature without adding other components, easy to use, small shrinkage after curing, good adhesion to most materials, and good electrical insulation Resistance, weather resistance, flex resistance, high temperature resistance and aging resistance, etc. It has a very wide ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09K3/10
Inventor 翁祝强王地林陈超
Owner 兆舜科技(广东)有限公司
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