A kind of coated flame retardant, its preparation method and application, and molding composition composed of it

A technology for molding compositions and flame retardants, applied in the fields of molding compositions and coated flame retardants, can solve problems such as uneven dispersion of compound flame retardants, optimize surface properties, and solve migration and precipitation , Improve the effect of flame retardant efficiency

Inactive Publication Date: 2017-12-29
ZHUHAI WANTONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The primary purpose of the present invention is to provide a coated flame retardant in which a dialkylphosphinate flame retardant is coated with a phosphorus-nitrogen flame retardant. The problem of uneven dispersion of flame retardants improves the uniformity of flame retardant polymer properties
At the same time, the surface of the phosphorus-nitrogen flame retardant is coated with a dialkylphosphinate flame retardant that is not easy to precipitate in the molding composition, which largely solves the problem of the high temperature and high humidity of the phosphorus-nitrogen flame retardant. The problem of easy migration and precipitation from the molding composition in the environment greatly optimizes the surface properties of the molding composition

Method used

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  • A kind of coated flame retardant, its preparation method and application, and molding composition composed of it
  • A kind of coated flame retardant, its preparation method and application, and molding composition composed of it
  • A kind of coated flame retardant, its preparation method and application, and molding composition composed of it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] A coated flame retardant, containing a core material of melamine with a particle size D(50) of 20.12 μm, and a coating layer of diethyl aluminum phosphinate on the outer surface of the core material, wherein diethyl phosphinate The mass ratio of aluminum-based phosphinate to melamine is 100:1; the particle size D (50) of the coated flame retardant is 31.33 μm; the moisture content is 0.15%; the bulk density is 561 g / L.

[0120] The preparation method of described coating type flame retardant comprises the steps:

[0121] a) Add 10g of melamine into 990g of water to make a melamine suspension;

[0122] b) According to the mass ratio of the melamine core material and the aluminum diethylphosphinate coating layer of 1:100, add 3692g of 30% sodium diethylphosphinate aqueous solution into the melamine suspension, and add 1707g 50% aluminum sulfate aqueous solution, reaction is completed at 70 ℃;

[0123] c) The coating reaction product was filtered, washed, and dried at 20...

Embodiment 2

[0127] A coated flame retardant, containing a core material of melamine polyphosphate with a particle size D(50) of 10.35 μm, and a coating layer of aluminum diethylphosphinate on the outer surface of the core material, wherein , the mass ratio of aluminum diethylphosphinate to melamine polyphosphate is 100:60; the particle size D (50) of the coated flame retardant is 30.12 μm; the moisture content is 0.43%; the bulk density is 650g / L.

[0128] The preparation method of described coating type flame retardant comprises the steps:

[0129] a) Take 100g of melamine polyphosphate and add it into 100g of water to make a suspension of melamine polyphosphate;

[0130] b) According to the mass ratio of the melamine polyphosphate core material and the aluminum diethylphosphinate coating layer of 60:100, add 1846g of 10% sodium diethylphosphinate aqueous solution into the melamine polyphosphate suspension, Add 771g 20% ​​aluminum sulfate aqueous solution in above-mentioned mixed solu...

Embodiment 3

[0135] A coated flame retardant, containing melamine with a particle size D (50) of 20.12 μm and a core material of a mixture of melamine polyphosphate with a D (50) of 10.35 μm, and the outer surface of the core material is coated with diethylene glycol The coating layer of aluminum-based phosphinate, wherein the mass ratio of melamine, melamine-polyphosphate mixture and aluminum diethylphosphinate coating layer is 6.7:33.3:100; the particle size of the coating-type flame retardant The diameter D (50) is 42.64μm; the moisture content is 0.32%; the bulk density is 612g / L.

[0136] The preparation method of described coating type flame retardant comprises the steps:

[0137] a) Add 16.7g of melamine and 83.3g of melamine polyphosphate into 400g of water to form a suspension of a mixture of melamine and melamine polyphosphate;

[0138] b) According to the mass ratio of melamine, melamine polyphosphate mixture core material and aluminum diethylphosphinate coating layer is 6.7:33...

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Abstract

The invention discloses a coated fire retardant. The coated fire retardant comprises a core material containing a phosphorus-nitrogen fire retardant of which the particle size is 0.5-70[mu] m, and the outer surface of the core material is covered with a coating layer coated with a dialkyl phosphinate fire retardant, the particle size of the core material of the phosphorus-nitrogen fire retardant is preferably 5-35 [mu]m. The phosphorus-nitrogen fire retardant in the coated fire retardant is a synergist of the dialkyl phosphinate fire retardant, the efficient recombination of the dialkyl phosphinate fire retardant and the phosphorus-nitrogen fire retardant can be realized by the coated fire retardant, the problem that a complex fire retardant mixture is not dispersed uniformly in a resin can be solved, the synergistic flame-retardant effect of the two components can be given into play maximally, and the coated fire restardant has a better synergism in comparison with the complex fire retardant mixture; meanwhile, dialkyl phosphinate which is uneasily separated out of a molding composition can be served as a shell which covers the surface of the phosphorus-nitrogen fire retardant, so as to solve the problem that the phosphorus-nitrogen fire retardant is easy to migrate and separate out of the molding composition in a hot and humid environment can be solved to a great extent, and the surface performance of the molding composition can be greatly optimized.

Description

technical field [0001] The invention belongs to the field of polymer additives, and relates to a coated flame retardant, in particular to a coated flame retardant formed by coating a dialkylphosphinate on the surface of a phosphorus-nitrogen flame retardant, and the Preparation method and application of coated flame retardant and molding composition composed of it. Background technique [0002] Polymer materials are widely used in all aspects of production and life due to their light weight, low price, acid and alkali corrosion resistance, and weather resistance. However, polymer materials are usually flammable or combustible, which brings great hidden dangers to the safety of people's lives and property. In order to solve the flammability problem of polymer materials, flame retardants are usually added to polymer materials. Currently, commonly used flame retardants include halogenated flame retardants and halogen-free flame retardants. [0003] Halogenated flame retardan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K5/3492C08L77/00C08L67/02C08L71/12C08L67/00
Inventor 柴生勇卢昌利陈林李积德孔蕾李岩
Owner ZHUHAI WANTONG CHEM
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