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Surface modified magnesium hydroxide as well as preparation method and application thereof

A magnesium hydroxide, surface modification technology, applied in the direction of dyeing low-molecular-weight organic compounds, fibrous fillers, etc., can solve the problems of compatibility, thermal stability and poor processing fluidity

Active Publication Date: 2018-12-21
LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the high addition of magnesium hydroxide that exists in the prior art and affect the mechanical properties and mechanical properties of the polymer, and the compatibility, thermal stability and processing fluidity of magnesium hydroxide and polymer materials are poor To solve the problem, a surface-modified magnesium hydroxide and its preparation method and application are provided. The method uses castor oil and phosphate compounds for double coating, and the process is simple, easy to operate, high in controllability, and simple in equipment. The process is pollution-free and meets the requirements of energy saving and environmental protection; moreover, the surface-modified magnesium hydroxide prepared by this method improves its compatibility with polymer materials and thermal stability, and can significantly improve the mechanical properties of polymer composites. Processing fluidity, etc.

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  • Surface modified magnesium hydroxide as well as preparation method and application thereof

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preparation example Construction

[0019] The first aspect of the present invention provides a method for preparing surface-modified magnesium hydroxide, wherein the method includes the following steps:

[0020] (1) First contact the modifier I with magnesium hydroxide;

[0021] (2) Perform a second contact between the modifier II and the product obtained in step (1);

[0022] Wherein, the modifier I is castor oil;

[0023] Wherein, the modifier II is phosphate or organic hypophosphorous acid metal salt.

[0024] According to the present invention, the main components of castor oil are cis-ricinoleic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid and dihydroxystearic acid. The inventors of the present invention have discovered through a large number of scientific experiments that castor oil can It reacts with the strong polar hydroxyl groups on the surface of magnesium hydroxide, and coats the surface of magnesium hydroxide to improve its compatibility with polymers.

[0025] According to the present in...

Embodiment 1

[0043] This example is to illustrate the surface modified magnesium hydroxide prepared by the preparation method of the present invention.

[0044] (1) Using magnesium hydroxide with a particle size of 5000 mesh as raw material, disperse at high speed in a mixer at a stirring rate of 3500r / min. After the temperature rises to 60°C, slowly add castor at a dropping rate of 1ml / min Stir the sesame oil for 30 minutes;

[0045] (2) Then add triethyl phosphate modified coated magnesium hydroxide, and continue to stir for 60 minutes at a temperature of 60°C to obtain modified magnesium hydroxide;

[0046] Among them, the amount of castor oil is 1% by weight of the magnesium hydroxide, and the amount of triethyl phosphate is 3% by weight of the magnesium hydroxide.

[0047] The result is a white powdery surface-modified magnesium hydroxide, and

[0048] In the processing of polymer composite materials with PE and EVA as matrix resins, the surface-modified magnesium hydroxide is used as a flame ...

Embodiment 2

[0050] This example is to illustrate the surface modified magnesium hydroxide prepared by the preparation method of the present invention.

[0051] (1) Using magnesium hydroxide with a particle size of 5000 mesh as raw material, disperse at a high speed in a mixer at a stirring rate of 2000r / min. After the temperature rises to 70°C, add slowly at a dropping rate of 0.5ml / min Stir the castor oil for 50 minutes;

[0052] (2) Then add triethyl phosphate modified coated magnesium hydroxide, and continue to stir for 30 minutes at a temperature of 70°C to obtain modified magnesium hydroxide;

[0053] Among them, the amount of castor oil is 1.5% by weight of the magnesium hydroxide, and the amount of triethyl phosphate is 5% by weight of the magnesium hydroxide.

[0054] The result is a white powdery surface-modified magnesium hydroxide, and

[0055] In the processing of polymer composites with PE and EVA as matrix resins, the surface-modified magnesium hydroxide is used as a flame retardant....

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Abstract

The invention relates to the technical field of processing of magnesium hydroxide flame retardants and discloses surface modified magnesium hydroxide as well as a preparation method and application thereof. The method comprises the following steps: firstly, carrying out first contact on a modifier I and magnesium hydroxide; secondly, carrying out second contact on a modifier II and a product obtained in the first step, wherein the modifier I is castor oil and the modifier II is phosphate or organic hypophosphorous acid metal salt. The method adopts the castor oil and phosphate compounds for double coating, and has the advantages of simple process, easiness in operation, high controllability and simple equipment; the method has no pollution in the whole process, and conforms to the requirements on energy conservation and environmental protection; in addition, the surface modified magnesium hydroxide prepared by the method has the advantages that the compatibility and thermal stability of the surface modified magnesium hydroxide and high polymer materials are improved; mechanical properties, processing fluidity and the like of high polymer complexes can be significantly improved.

Description

Technical field [0001] The invention relates to the technical field of magnesium hydroxide flame retardant processing, in particular to a surface modified magnesium hydroxide and a preparation method and application thereof. Background technique [0002] Magnesium hydroxide flame retardant is widely used in various organic materials. It can prevent flame burning and reduce the harm of harmful gases in the combustion process of objects. Its flame retardant principle is to liberate crystal water by heating and absorb a large amount of heat to reduce polymer The temperature of the surface inhibits the decomposition of the polymer. [0003] Magnesium hydroxide has low flame retardancy efficiency. To make the flame retardancy of the polymer material meet the requirements, the usual addition amount needs to account for more than 60% of the total mass of the composite. This will have a great negative impact on the mechanical properties and mechanical properties of the polymer. At the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C08K9/10C08K9/04C08K3/22C08L23/06C08L23/08
CPCC01P2006/37C08K3/22C08K9/04C08K9/10C08K2003/2224C08L23/06C08L23/0853C08L2201/02C09C1/028C09C3/08
Inventor 苗龙强尚兴记裴广斌
Owner LUOYANG ZHONGCHAO NEW MATERIAL SHARES CO LTD
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