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Method for preparing silicone oil surface modified aluminium hydroxide flame retardant

A technology of aluminum hydroxide flame retardant and surface modification, which is applied in the treatment of dyed organosilicon compounds and fibrous fillers, etc. It can solve the problems of low decomposition temperature, weak binding force of polymer matrix, and poor thermal stability of aluminum hydroxide and other problems, to achieve high decomposition temperature, expand the application range and processing temperature, and eliminate the effect of foaming

Inactive Publication Date: 2011-04-27
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum hydroxide treated by these two types of surface treatment technologies still has the problems of poor thermal stability, low decomposition temperature, and weak binding force with the polymer matrix.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First, dissolve 0.4g of hydrogen-containing silicone oil modifier in 2.0g of carbon tetrachloride, stir well and make a silicone oil modification solution; pour 40g of aluminum hydroxide powder into a 150ml three-necked flask, and use mechanical stirring at a speed of 300 rpm, after preheating at a constant temperature of 80°C for 20 minutes, slowly add the prepared silicone oil modification solution in the form of high-pressure spray, and stir for 20 minutes; spray 0.4g of 10% catalyst solution in mist form, and react for 20 minutes , evaporate the organic solvent, and dry at 120°C for 4h to obtain modified aluminum hydroxide.

experiment example 2

[0024] Dissolve 0.8g of hydroxysilicone oil modifier in 8.0g of absolute ethanol, stir well and prepare a modified solution for later use; pour 40g of aluminum hydroxide powder into a 150ml three-necked flask, and stir mechanically at a speed of 500 rpm After preheating at a constant temperature at 100°C for 10 minutes, slowly add the prepared silicone oil modification solution by high-pressure spray, and stir for 20 minutes; 2.0 g of tetramethylammonium hydroxide aqueous solution with a mass concentration of 15% was sprayed Spray it in, and after reacting for 30min, evaporate the organic solvent and dry at 80°C for 8h to obtain modified aluminum hydroxide.

experiment example 3

[0026] Dissolve 0.6g of carboxyl silicone oil modifier in 4.5g of ethyl acetate, stir well and prepare a modified solution for later use; pour 40g of aluminum hydroxide powder into a 150ml three-necked flask, and stir mechanically at a speed of 700 rpm After preheating at a constant temperature at 60°C for 30 minutes, slowly add the prepared silicone oil modification solution in the form of high-pressure spray, and stir for 10 minutes; 3.0 g of a 20% tetramethylammonium hydroxide aqueous solution Spray it in, and react for 30 minutes, evaporate the organic solvent, and dry at 100°C for 6 hours to obtain modified aluminum hydroxide.

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PUM

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Abstract

The invention discloses a method for preparing a silicone oil surface modified aluminium hydroxide flame retardant, which is characterized by taking silicone oil as a surface modifier, uniformly wrapping the surface of aluminium hydroxide powder with the silicone oil through physical adsorption under action of stirring and then adding a catalyst to impel the functional groups on the molecules of the modified silicon oil to react with the hydroxyl groups on the surface of aluminium hydroxide powder so that the silicone oil is tightly wrapped on the surface of aluminium hydroxide powder throughchemical bonding, thus obtaining the modified aluminium hydroxide powder. The modified aluminium hydroxide prepared by the method has good thermal stability and high decomposition temperature, can improve the mechanical property and flame retardant property of the composite materials and has simple process.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing a silicone oil surface-modified aluminum hydroxide flame retardant. Background technique [0002] Aluminum hydroxide flame retardant has three functions of flame retardancy, smoke elimination and filling, and can be widely used in flame retardancy and filling of polymer materials. However, since aluminum hydroxide is a strong polar inorganic material, the particles are easy to agglomerate and have poor compatibility with non-polar polymers. When used alone, the filling amount must reach more than 60% to have better flame retardancy. However, it seriously affects the processability and mechanical properties of the polymer; and the thermal stability of aluminum hydroxide is poor, and the decomposition temperature is low, which limits its scope of use. Therefore, effective measures must be taken to improve the surface properties of aluminum hydroxide powder. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/12C09C1/40C08K9/06C08K9/10C08K3/22
Inventor 陈鸣才郑炳发许凯付子恩
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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