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a nano sb 2 o 3 -sio 2 Composite airgel inorganic flame retardant and preparation method

A technology of composite aerogel and inorganic flame retardant, applied in the field of inorganic flame retardant, can solve the problems of accelerated combustion rate of composite materials, unsatisfactory comprehensive performance, unsatisfactory flame retardant effect, etc., and achieve uniform particle size distribution. , strong affinity, good dispersion effect

Active Publication Date: 2016-11-02
无锡市辰元科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Rubber is a kind of strong stretchable elastomer, but its overall performance is not satisfactory. In the process of producing rubber products, carbon black is usually added to the rubber compound to improve its strength, wear resistance and aging resistance, but due to carbon black The addition of black makes the products all black, and the grade is not high
while nano-SiO 2 As a reinforcing agent, add a small amount of nano-SiO to ordinary rubber 2 Finally, the strength, wear resistance and anti-aging properties of the product have reached or exceeded the traditional high-grade rubber products, and can produce a new generation of rubber products with novel colors and excellent performance, and can keep the color unchanged for a long time, but a single nano-SiO 2 As a flame retardant, the addition amount is relatively large, and the flame retardant effect is not ideal (LOI2 When used as a flame retardant for rubber and plastic materials, the burning rate of the composite material is accelerated

Method used

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  • a nano sb <sub>2</sub> o <sub>3</sub> -sio <sub>2</sub> Composite airgel inorganic flame retardant and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The silica-antimony trioxide (Sb) of the present embodiment 2 o 3 -SiO 2 ) The preparation method of composite airgel inorganic flame retardant, comprises the steps:

[0031] S1. Mix silicon alkoxide orthoethyl silicate (TEOS), ethanol solution of antimony trichloride and water evenly, adjust its pH value to 2 with acidic catalyst hydrochloric acid, stir well to make it mix evenly, and then transfer it to a closed container. Placed at a constant temperature of 65°C for 24 hours to form an alcohol gel flame retardant; the concentration of the ethanol solution of antimony trichloride is 0.2mol / L; the volume ratio of the silicon alkoxide, antimony salt alcohol solution and water is 1:2:5.

[0032] S2. Place the alcohol gel flame retardant prepared in step S1 to age at room temperature for 25 hours, then soak it in a 1:1 (V / V) mixture of water and ethanol to wash off the alcohol gel Unreacted free acid and unhydrolyzed Sb in flame retardant 3+ ions, then take out the w...

Embodiment 2

[0039] The silica-antimony trioxide (Sb) of the present embodiment 2 o 3 -SiO 2 ) The preparation method of composite airgel inorganic flame retardant, comprises the steps:

[0040] S1. Mix the methanol solution of silicon alkoxide methyl orthosilicate and antimony nitrate with water evenly, adjust the pH value to 3 with acidic catalyst hydrofluoric acid, stir well to make it evenly mixed, and then transfer it to a closed container. Place at a constant temperature of ℃ for 12 hours to form an alcohol gel flame retardant; the concentration of the antimony salt alcohol solution is 0.5mol / L; the volume ratio of the silicon alkoxide, antimony salt alcohol solution and water is 1:15: 10;

[0041] S2. Place the alcohol gel flame retardant prepared in step S1 to age at room temperature for 48 hours, then soak it in a 1:1 (V / V) mixture of water and ethanol to wash off the alcohol gel Unreacted free acid and unhydrolyzed Sb in flame retardant 3+ ions, then take out the wet gel and...

Embodiment 3

[0047] The silica-antimony trioxide (Sb) of the present embodiment 2 o 3 -SiO 2 ) The preparation method of composite airgel inorganic flame retardant, comprises the steps:

[0048] S1. Mix the propanol solution of silicon alkoxide propyl silicate, antimony trichloride and water evenly, adjust its pH value to 2.5 with acidic catalyst hydrochloric acid, stir well to make it evenly mixed, then transfer it to an airtight container. ℃ for 20 hours at a constant temperature to form an alcohol gel flame retardant; the concentration of the antimony salt alcohol solution is 0.3mol / L; the volume ratio of the silicon alkoxide, antimony salt alcohol solution and water is 1:5: 8.

[0049] S2. Place the alcohol gel flame retardant prepared in step S1 to age at room temperature for 12 hours, then soak it in a 1:1 (V / V) mixture of water and ethanol to wash off the alcohol gel Unreacted free acid and unhydrolyzed Sb in flame retardant 3+ ions, then take out the wet gel and put it into th...

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Abstract

The present invention relates to a kind of nanometer Sb 2 o 3 ‑SiO2 2 The preparation method of the composite airgel inorganic flame retardant comprises the following steps: S1, uniformly mixing silicon alkoxide, antimony salt alcohol solution and water, adjusting its pH value to 2-3 with an acidic catalyst, fully stirring to make it mix Evenly transferred to a closed container, placed at a constant temperature of 60-70°C for 12-24 hours to form an alcohol gel flame retardant; S2, placing the alcohol gel flame retardant prepared in step S1 at room temperature for aging 12‑48h, wash away the unreacted free acid and unhydrolyzed Sb in the alcohol gel flame retardant 3+ ions, then take out the wet gel and put it into the surface modifier to soak for 24-30 hours, after supercritical drying, crush the massive airgel to get nano-silica-antimony trioxide composite airgel inorganic resistance Fuel. When it is applied to polymer materials, it has better flame retardant and heat insulation properties, higher mechanical strength, and better hydrophobic properties.

Description

technical field [0001] The invention belongs to the field of inorganic flame retardants, in particular to a nano-silica-antimony trioxide (Sb 2 o 3 -SiO 2 ) composite airgel inorganic flame retardant, the invention also provides a preparation method of the flame retardant. Background technique [0002] The preparation of high-performance flame-retardant polymer materials is one of the key development directions in the field of polymer science today. With the advancement of science and technology and the development of society, the requirements for materials are getting higher and higher. People hope that the material has various characteristics, such as high toughness and high rigidity; high temperature resistance, flame retardancy and easy processing; durable and low price. Among all kinds of flame retardants, organic flame retardants have disadvantages such as large smoke generation, high toxicity, and poor thermal stability, and will gradually be replaced with the enh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/00C08K9/06C08K3/36C08K3/22C08L21/00C08L23/06
Inventor 秦如新
Owner 无锡市辰元科技有限公司
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