Modified ammonium polyphosphate intumescent flame retardant as well as preparation method and application thereof

A technology of intumescent flame retardant and ammonium polyphosphate, which is applied in modified ammonium polyphosphate flame retardant and its application field, can solve problems such as restricting the optional range of polymerization degree of ammonium polyphosphate, no reports, and increasing the difficulty of preparation process , to achieve the effects of small addition, cost reduction and good flame retardant effect

Inactive Publication Date: 2021-07-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical reaction of these chemically modified ammonium polyphosphates occurs in the water phase, that is, ammonium polyphosphates need to be better dissolved in water, and this is contradictory to the insoluble properties of highly polymerized ammonium polyphosphates.
Therefore, the difficulty of the preparation process is increased and the optional range of the polymerization degree of ammonium polyphosphate in the chemical modification process is restricted.
Utilize the amino group of the silane coupling agent that contains amino group to carry out the research of chemical modification ammonium polyphosphate simultaneously and also have no report

Method used

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  • Modified ammonium polyphosphate intumescent flame retardant as well as preparation method and application thereof
  • Modified ammonium polyphosphate intumescent flame retardant as well as preparation method and application thereof
  • Modified ammonium polyphosphate intumescent flame retardant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] At room temperature, mix 300 parts of ethylene glycol and 100 parts of 0.1 mol / L sodium hydroxide aqueous solution as a solvent, add 100 parts of ammonium polyphosphate I with a degree of polymerization of 200, stir well, and then add 166 parts of 3-aminopropyl Trimethoxysilane, then stirred and heated to 90°C, reacted for 3h, filtered, washed with industrial alcohol, and vacuum-dried to obtain the product with a yield of 95%.

Embodiment 2

[0037] At room temperature, mix 400 parts of propylene glycol and 100 parts of 0.4 mol / L sodium hydroxide aqueous solution as a solvent, add 100 parts of ammonium polyphosphate I with a polymerization degree of 500, and stir well, then add 84 parts of 3-aminopropyl methyl Dimethoxysilane, then stirred and heated to 70°C, reacted for 5h, filtered, washed with denatured alcohol, and vacuum-dried to obtain the product with a yield of 89%.

Embodiment 3

[0039] At room temperature, mix 600 parts of glycerol and 100 parts of 0.6 mol / L sodium hydroxide aqueous solution as a solvent, add 100 parts of ammonium polyphosphate II with a polymerization degree of 800, stir well, and then add 91.5 parts of aminoethylaminopropyl base trimethoxysilane, then stirred and heated to 80°C, reacted for 4h, filtered, washed with denatured alcohol, and vacuum-dried to obtain the product with a yield of 92%.

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Abstract

The invention discloses a modified ammonium polyphosphate intumescent flame retardant as well as a preparation method and application thereof. The chemically modified ammonium polyphosphate is prepared by carrying out cation exchange reaction on ammonium ions (NH4 +) of ammonium polyphosphate and amino groups (-NH2) of an amino group-containing silane coupling agent in a mixed solution of a sodium hydroxide aqueous solution and polyol, and a new silane coupling agent modification mode is created; silicon hydroxyl is introduced through modification, so that the condensed phase flame-retardant effect is improved; the flame retardant can be independently used as an intumescent flame retardant to be applied to a high polymer material, and is low in consumption and good in flame retardant effect due to the gas-phase flame retardance of the raw materials. The reaction is simple and easy to control, synthesis preparation is convenient, and industrialization is easy.

Description

technical field [0001] The invention belongs to the technical field of modified ammonium polyphosphate flame retardant and its application, in particular to a preparation method of chemically modified ammonium polyphosphate expansion flame retardant with an amino group-containing silane coupling agent and its flame retardant application. Background technique [0002] As one of the most widely used intumescent flame retardant materials, ammonium polyphosphate is favored by practitioners because of its high phosphorus-to-nitrogen ratio and its ability to act as an acid source and a gas source for intumescent flame retardants. . However, in order to achieve a better flame-retardant effect, ammonium polyphosphate is usually used in combination with a char-forming agent, and the dosage is relatively large. In addition, ammonium polyphosphate has poor compatibility with the substrate, which leads to a series of problems such as the decrease of the mechanical properties of the pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K3/32C08L63/00C08L23/12C08L23/06
CPCC08K9/06C08K3/32C08K2003/323C08L2201/02C08L63/00C08L23/12C08L23/06
Inventor 张猛孙强晏泓郭睿劼赵晶
Owner TAIYUAN UNIV OF TECH
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