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A flame retardant and its synthetic process

A polyphosphate, chloroalkyl technology, applied in the direction of phosphorus organic compounds, textiles and papermaking, fiber processing, etc., can solve environmental pollution, a large number of problems, and achieve good thermal stability, simple synthesis process, long-lasting resistance. flammable effect

Inactive Publication Date: 2011-12-14
SHOUGUANG WEIDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since 1986, researchers have found that organic halogen flame retardants generate a large amount of smoke and corrosive gases during thermal cracking and combustion, which have certain pollution to the environment.

Method used

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  • A flame retardant and its synthetic process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of synthetic technique of chlorinated alkyl polyphosphate flame retardant comprises the steps:

[0033] (1) Add 217.7g (1.42mol) of POCl to a four-necked flask equipped with an electric stirrer, a constant pressure dropping funnel, a thermometer and a vacuum absorber connected to hydrochloric acid 3 (Phosphorus oxychloride), turn on the electric stirrer and hydrochloric acid vacuum absorber, control the temperature of the water bath at 25-30°C, slowly add 75g (0.71mol) of diethylene glycol dropwise, a large amount of hydrogen chloride gas is generated, dropwise in 0.5-3 hours After the completion of the dropwise addition, continue the reaction until no hydrogen chloride gas is generated to obtain the reaction intermediate, which is left in the four-necked bottle, and directly proceeds to the next step of synthesis;

[0034] (2) Refit the four-neck bottle containing the intermediate in the above step (1) into a reaction device with an electric stirrer, a constant ...

Embodiment 2

[0037] Same as Example 1, but in the second step of the reaction, 1.5 g of anhydrous aluminum trichloride is used as the catalyst Lewis acid to replace 1.6 g of titanium tetrachloride, and the product is washed with water and evaporated under reduced pressure to obtain the finished product.

[0038] Results: Yield 82%, phosphorus content 10.9%; chlorine content: 23%.

Embodiment 3

[0040] Same as Example 1, but in the second step of the reaction, the catalyst Lewis acid is replaced by 1.5g of magnesium chloride for 1.6g of titanium tetrachloride, and the product is washed with water and evaporated under reduced pressure to obtain the finished product.

[0041] Results: Yield 75%, phosphorus content 10.9%; chlorine content: 23%.

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Abstract

The invention discloses a chlorinated alkyl polyphosphate flame retardant and a synthesis process thereof. The flame retardant is an intermediate formed by reacting phosphorus oxychloride and diethylene glycol as raw materials, and the intermediate is then combined with epoxy Propane reacts under the condition of catalyst, synthesizes and obtains the product of the present invention; The advantage of the present invention is: technique is simple, and reaction process is easy to control, and the synthetic chloroalkyl polyphosphate is mainly used as rubber, polyurethane, artificial fiber, artificial leather etc. The flame retardant of the material has stable flame retardant performance. It can be used as a flame retardant, a stabilizer, a flame retardant plasticizer, and a crosslinking agent.

Description

technical field [0001] The invention relates to a flame retardant, in particular to a chlorinated alkyl polyphosphate flame retardant and a synthesis method thereof, belonging to the field of chemical industry. Background technique [0002] In the 1960s, the first flame retardant developed abroad was an organic halogen flame retardant, which has the advantages of high flame retardant efficiency, less dosage, little impact on material properties, and moderate price, and occupies an important position in the field of flame retardants. status. However, since 1986, researchers have discovered that organic halogen flame retardants generate a large amount of smoke and corrosive gases during thermal cracking and combustion, which have certain pollution to the environment. In the modern society where people pay more and more attention to environmental protection, the development of halogenated flame retardants is also restricted. Especially in recent years, under the situation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/12C07F9/09C08K5/521C08L21/00C08L75/04D06M13/298
Inventor 袁德洪郭兴玉刘瑞祥徐玉亮孙立军
Owner SHOUGUANG WEIDONG CHEM
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