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Method for preparing nitrogen-phosphorus-magnesium compound fire retardant

A composite flame retardant, nitrogen and phosphorus technology, applied in the direction of fire-resistant coatings, can solve the problems of poor compatibility and high filling amount of magnesium-based flame retardants, achieve stable performance, significant product performance and environmental friendliness, and reduce the filling amount. Effect

Inactive Publication Date: 2010-08-04
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The invention provides a preparation method of a nitrogen-phosphorus-magnesium composite flame retardant. Nitrogen-phosphorus compounds are grafted on the surface of magnesium-based compounds by chemical bonding, which combines the excellent smoke suppression performance of magnesium-based flame retardants and nitrogen-phosphorus The excellent flame retardant efficiency of flame retardants solves the problems of high filling amount and poor compatibility of pure magnesium flame retardants

Method used

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  • Method for preparing nitrogen-phosphorus-magnesium compound fire retardant

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Embodiment 1

[0013] Take 10kg of 1000-8000 mesh magnesium hydroxide powder, 30g of sodium hexametaphosphate, and take 40L of a mixture of two-carbon alcohol and water at a ratio of 1:1 to 1:5 as a solvent, and add it to the reactor, keeping 150r / min stirring speed, heated to 60°C and kept warm for 1h; filtered, put the filter cake in the reactor, added 9kg of phosphoric acid alcohol solution with a mass ratio of 1:2, mixed and stirred for 15min, and then added the twelve-carbon-containing Nitrogen compound 1.5kg, continue to stir and react for 20 minutes, after the reaction is completed, dry the product to obtain a fluffy composite flame retardant product. The prepared composite flame retardant is used in EVA and POE plastics. The measured basic parameters and the comparison data of halogen-free flame-retardant cable materials are shown in Table 1, which shows that the composite flame retardant meets the corresponding national standard requirements.

[0014] Table 1 Application performanc...

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Abstract

The invention belongs to the technical field of organic-inorganic compound fire retardants and relates to preparation technology of a nitrogen-phosphorus-magnesium compound fire retardant. The invention is characterized by taking a micron magnesium-based compound as the raw material, activating the surface of the compound in the presence of a surface activating assistant, then adding a phosphorus-containing compound and a nitrogen-containing compound with fire retardant effects according to certain sequence and formula ratio, mixing the mixture uniformly and reacting the mixture completely, then carrying out filtering and drying to obtain the nitrogen-phosphorus-magnesium compound fire retardant product. The nitrogen, the phosphorus and the magnesium in the prepared compound fire retardant can generate synergic fire retardant effect and effectively reduce the filling volume of the compound fire retardant while ensuring good smoke suppression effect. No waste is discharged in the whole preparation process and the reaction flow is simple and easy to control. The method shows obvious competitive advantage and profit space in such aspects as manufacture cost, product performance, environment-friendly property, etc.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic composite flame retardants, and in particular relates to a preparation method of a nitrogen-phosphorus-magnesium composite flame retardant. Background technique [0002] Since the promulgation of the EU RoHS and WEEE directives in 2003, the halogen-free process in the field of flame retardants has been rapidly promoted, and the new magnesium-based and nitrogen-phosphorus-based halogen-free flame retardants have made great progress. Magnesium-based flame retardants have very good smoke suppression function, but in actual application, the filling amount needs to be more than 60% to have good flame retardant performance. A great waste of magnesium resources. In addition, magnesium-based flame retardants have strong polarity and hydrophilicity. When they are used as inorganic fillers in high molecular polymers, due to the different thermal expansion coefficients of the two phases, their the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/10C09K21/04C08K13/02
Inventor 宁桂玲王雪松叶俊伟庞洪昌贡卫涛林源
Owner DALIAN UNIV OF TECH
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