Rare earth metal hypophosphite and preparation method and application of rare earth metal hypophosphite

A rare earth metal, hypophosphite technology, applied in the direction of hypophosphorous acid, phosphorus oxyacid, etc., can solve the problems of the decline of mechanical properties of polymer materials, the large volume of flame retardants, and the low density of aluminum hypophosphite, and achieve low mechanical properties. , The effect of high thermal stability and small volume

Inactive Publication Date: 2012-12-26
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density of aluminum hypophosphite is small, and the flame retardant per unit mass has a large volume,

Method used

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  • Rare earth metal hypophosphite and preparation method and application of rare earth metal hypophosphite
  • Rare earth metal hypophosphite and preparation method and application of rare earth metal hypophosphite
  • Rare earth metal hypophosphite and preparation method and application of rare earth metal hypophosphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Dissolve 4.0 g of hypophosphorous acid in 50 ml of water, add sodium hydroxide until the pH of the solution is 3.0, then add 50 ml of aqueous solution containing 7.0 g of lanthanum chloride dropwise to the above solution, and stir at 40°C for 3 hours, Cool, filter, wash and dry the reaction product to obtain lanthanum hypophosphite.

Embodiment 2

[0025] Dissolve 4.5 g of hypophosphorous acid in 55 ml of water, add sodium hydroxide until the pH of the solution is 3.5, then add 55 ml of aqueous solution containing 7.5 g of cerium chloride dropwise into the above solution, and stir at 50° C. for 3.5 hours, Cool, filter, wash and dry the reaction product to obtain cerium hypophosphite.

Embodiment 3

[0027] Dissolve 5.0 g of hypophosphorous acid in 60 ml of water, add sodium hydroxide until the pH of the solution is 4, then add 60 ml of aqueous solution containing 8.0 g of samarium nitrate dropwise into the above solution, stir at 55°C for 4 hours, and cool , Filter and wash the reaction product, and after drying, samarium hypophosphite is obtained.

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Abstract

The invention discloses rare earth metal hypophosphite higher in density and high in thermal stability, and a preparation method and an application of the rare earth metal hypophosphite as a flame retardant in a polymer material. The formula of the rare earth metal phosphate is Ln(H 2PO2)3(H2O).The preparation method of the rare earth metal hypophosphite comprises the steps of dissolving hypophosphite in water, adding sodium hydroxide to the solution to allow the pH of the solution to be 3.0-4.0, adding rare earth metal nitrate or an aqueous solution of rare earth metal chloride salt to be solution, stirring for 3-4 hours at 40-60 DEG C, cooling, filtering and washing to a reaction product, and obtaining the rare earth metal hypophosphite after drying. A halogen-free flame retardant polymer composite taking the rare earth metal hypophosphite as the flame retardant comprises the following components by mass percent: 40-90% of polymer and 10-25% of rare earth metal hypophosphite.

Description

technical field [0001] The invention belongs to the technical field of halogen-free flame retardant and plastic processing application, and in particular relates to a rare earth metal hypophosphite and its preparation method, and its application as a flame retardant in polymer materials. Background technique [0002] After decades of rapid development, polymer materials have become important materials in the fields of industry, agriculture, national defense and science and technology. Polymer materials are ubiquitous, widely permeated in all aspects of human production and life, and play a huge role. However, polymer materials are easy to burn and have potential fire hazards, so it is very necessary to treat polymer materials with flame retardant treatment. At present, halogen-containing flame retardants are widely used in China to treat polymer materials. Although halogen-containing flame retardants have the advantages of high flame-retardant efficiency and low production...

Claims

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Application Information

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IPC IPC(8): C01B25/165C08L67/02C08L77/02C08L77/06C08K3/32C08K7/14
Inventor 胡源杨伟宋磊
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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