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Surface modified aluminium hydroxide fire retardant and its prepn process

An aluminum hydroxide flame retardant and surface modification technology, which is applied in the treatment of dyed low molecular organic compounds, etc., can solve the problem of not introducing the preparation method of aluminum hydroxide, not involving the preparation process of coarse and fine particle aluminum hydroxide, and adding flame retardants. It can improve the physical and mechanical properties, reduce the cost of surface treatment, and prevent the degradation of thermal oxygen.

Inactive Publication Date: 2007-12-19
HANGZHOU HI TECH FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

US4,251,430 introduces an aluminum hydroxide flame retardant, which contains 10-30% of ultra-fine aluminum hydroxide with a particle size of less than 1 micron and 45-75% of coarse aluminum hydroxide with a particle size of 38-150 microns The composition of the flame retardant has good processing performance, and the addition amount of the flame retardant is greatly increased, but the invention does not introduce the preparation method of aluminum hydroxide with c

Method used

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  • Surface modified aluminium hydroxide fire retardant and its prepn process
  • Surface modified aluminium hydroxide fire retardant and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Example 1: 250 kg of industrial-grade aluminum hydroxide was first mechanically pulverized by a built-in grading turbine pulverizer, and the particle size distribution was controlled to obtain aluminum hydroxide with an average particle size of 12.5 μm, and the maximum particle size did not exceed 30 μm; The 100 kg of the powder is pulverized by a jet mill, and the particle size distribution range is 0.4-15 μm. Then 150 kg of the mechanically pulverized product and 100 kg of the jet pulverized product were placed in a coulter mixer for mixing. 3 kilograms of diisooctylphenyl phosphite, 2.7 kilograms of three (beta-chloropropyl) phosphate (TCPP), 0.5 kilograms of Si-69 silane coupling agents are added in the top spray device of coulter type mixer, add Press to 8 kg and spray. Heat the coulter mixer to 110°C, stir for 30 minutes, and discharge to obtain a white powder with good fluidity. The average particle diameter of the product was determined to be 8.9 μm.

[0028] ...

Embodiment 2

[0029] Example 2: 250 kg of industrial-grade aluminum hydroxide was first mechanically pulverized by a built-in grading turbine pulverizer, and the particle size distribution was controlled to obtain aluminum hydroxide with an average particle size of 13.2 μm, and the maximum particle size did not exceed 30 μm; The 100 kg of the powder is pulverized by a jet mill, and the particle size distribution range is 0.4-15 μm. Then 150 kg of the mechanically pulverized product and 100 kg of the jet pulverized product were placed in a coulter mixer for mixing. Add 4.5 kg of diisooctylphenyl phosphite and 0.5 kg of aminopropyltriethoxysilane coupling agent into the top spray device of the coulter mixer, pressurize to 8 kg, and spray. Heat the coulter mixer to 110°C, stir for 20 minutes, and discharge to obtain a white powder with good fluidity. The average particle diameter of the product was determined to be 9.1 μm.

[0030] The above sample was roasted and dehydrated at 500°C, and th...

Embodiment 3

[0031] Example 3: 250 kg of industrial-grade aluminum hydroxide was first mechanically pulverized by a built-in grading turbine pulverizer, and the particle size distribution was controlled to obtain aluminum hydroxide with an average particle size of 13.5 μm, and the maximum particle size did not exceed 30 μm; 200kg of the powder is crushed by a jet mill, and the particle size distribution range is 0.4-15μm. Then 50 kg of the mechanically pulverized product and 120 kg of the jet pulverized product were placed in a coulter mixer for mixing. Add 5.5 kilograms of tris (β-chloropropyl) phosphate (TCPP), 0.5 kilograms of chloropropylmethyl diethoxysilane coupling agent into the top spray device of the plow mixer, pressurize to 8 kilograms, and carry out spray. Heat the coulter mixer to 110°C, stir for 20 minutes, and discharge to obtain a white powder with good fluidity. The average particle size of the product was determined to be 5.5 μm.

[0032] The above sample was roasted ...

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Abstract

The present invention relates to one kind of surface modified aluminum hydroxide fire retardant and its preparation process. The technological scheme is that industrial aluminum hydroxide material is first crushed through mechanical crushing and airflow crushing to form mixture material of thick and thin components, and then surface treated with phosphate and phosphate in 0.5-10 wt% and silane coupler in 0-2.0 wt%. The surface modified aluminum hydroxide fire retardant is applied in fire retarding foamed polymer material, and has the features of less influence on the decomposition of foaming agent and high whiteness of the foamed material.

Description

technical field [0001] The invention relates to a chemical product and a preparation method thereof, in particular to a surface-modified aluminum hydroxide flame retardant and a preparation method thereof. Background technique [0002] Aluminum hydroxide (Al(OH) 3 ) as a flame retardant has been widely used in polymer materials. When the heating temperature exceeds 200°C, aluminum hydroxide begins to decompose to produce aluminum oxide and water. The reaction process is endothermic, thereby reducing the temperature of the polymer material; the released water vapor accounts for 34.6% of the weight of aluminum hydroxide, which can dilute the air and the flammable gas produced by decomposition. The above factors can make the polymer material with aluminum hydroxide flame retardant. The flame retardancy of many flame retardants is achieved by producing high-density gas covering the surface of combustibles and cutting off the free radical chains during combustion to achieve th...

Claims

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Application Information

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IPC IPC(8): C09K21/02C09C3/08C08K9/04C08K3/22
Inventor 熊剑峰于家波朱光林
Owner HANGZHOU HI TECH FINE CHEM
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