Ammonium polyphosphate grafting modification preparation method

A technology of ammonium polyphosphate and graft modification, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems affecting the development of ammonium polyphosphate halogen-free flame retardants, poor compatibility, flame retardant migration, etc. Problems, achieve the effect of overcoming the easy damage of the coating film

Inactive Publication Date: 2011-11-02
PUYANG CHENGKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because ammonium polyphosphate itself is easy to absorb moisture and has poor compatibility with organic materials, it is easy to cause the physical and chemical properties of organic flame retardant materials to decline, which seriously affects the application of ammonium polyphosphate in coatings and organic materials and the development of halogen-free flame retardants.
In order to solve the defects of ammonium polyphosphate easy to absorb moisture and poor compatibility with organic materials, ammonium polyphosphate powder is often used for surface treatment and coated with organic films to change the problems of moisture absorption and compatibility with organic materials.
Although this method improves the hygroscopicity of ammonium polyphosphate and the compatibility with organic materials, because the surface coating film is non-reactive, it is easy to be damaged during the processing of organic materials, and there are still poor water resistance and flame retardants. Problems with Migration in Organic Materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Dissolve 38g of grafting agent in 450ml of solvent, heat to 45°C-60°C, add 210g of ammonium polyphosphate with a degree of polymerization greater than 1000 under stirring, react for 1-2.5 hours, cool down, remove the solvent at rest, dry and pulverize, Obtain 241g finished product modified ammonium polyphosphate. The product yield is 97%, wherein the phosphorus content is 27% (mass ratio). The grafting agent is glycidyl ether. The solvent is diacetone alcohol chloroform solution with a mass ratio of 45:55.

[0015] The application of the finished product modified ammonium polyphosphate obtained by the above method in polypropylene plastics:

[0016] The polypropylene and modified ammonium polyphosphate are blended at a ratio of 72:28 (mass ratio), and the properties of the obtained intumescent halogen-free flame-retardant polypropylene are as follows:

[0017] Polypropylene Flame retardant polypropylene Oxygen Index 18.7 32.8 Vertical burnin...

Embodiment 2

[0020] Dissolve 30g of grafting agent in 450ml of solvent, heat to 45°C-60°C, add 210g of ammonium polyphosphate with a degree of polymerization greater than 1000 under stirring, react for 1-2.5 hours, cool down, remove the solvent, dry, and pulverize to obtain 235g of finished modified ammonium polyphosphate, yield 98%, phosphorus content 27.8% (mass ratio). The grafting agent is glycidyl ether. The solvent is diacetone alcohol chloroform solution with a mass ratio of 45:55.

[0021] Application of modified ammonium polyphosphate in ABS resin:

[0022] The ABS resin and modified ammonium polyphosphate are blended at a ratio of 80:20 (mass ratio), and the properties of the obtained expanded halogen-free ABS resin are as follows:

[0023] ABS resin Flame retardant ABS resin Oxygen Index 22.5 32.4 Vertical burning test (UL94) HB V－0 Impact strength (J / m) 316 309 Tensile strength (Mpa) 37.3 36.7 Bending strength (Mpa) 67.8 68.5...

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Abstract

The invention relates to a grafting modification method of inorganic macromolecular compounds, and especially relates to a grafting modification preparation method of ammonium polyphosphate. The method comprises the steps that: a grafting agent is dissolved in a solvent, and the solution is heated to a temperature of 45 to 60 DEG C; ammonium polyphosphate with a polymerization degree greater than 1000 is added to the solution while stirring; the mixture is subject to a reaction for 1 to 2.5 hours; the resulting solution is cooled and stood, such that the solvent is removed; the resulting material is dried by baking, and is pulverized, such that a finished product of modified ammonium polyphosphate is obtained. According to the invention, organic molecules and ammonium polyphosphate are subject to a grafting reaction. In prior arts of surface coating methods, coated films are easily damaged during processing procedures. With the technical schemes of the present invention, the problem is overcome, and defects of ammonium polyphosphate are overcome.

Description

technical field [0001] The invention relates to a method for grafting modification of inorganic polymer compounds, in particular to a preparation method for grafting modification of ammonium polyphosphate. technical background [0002] As a halogen-free flame retardant for coatings and organic materials, ammonium polyphosphate is an emerging environmentally friendly flame retardant and is also the main raw material for preparing intumescent halogen-free flame retardants. However, because ammonium polyphosphate itself is easy to absorb moisture and has poor compatibility with organic materials, it is easy to cause the physical and chemical properties of organic flame retardant materials to decline, which seriously affects the application of ammonium polyphosphate in coatings and organic materials and the development of halogen-free flame retardants. In order to solve the defects of ammonium polyphosphate easy to absorb moisture and poor compatibility with organic materials, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/40
Inventor 席趁星赵玺振
Owner PUYANG CHENGKE CHEM
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