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Rear earth organic phosphonate flame retardant, synthesizing method and use thereof

A synthesis method and organic phosphine technology are applied in the fields of fine chemicals and polymer materials to achieve the effects of wide synergy, high phosphorus content and wide applicability

Active Publication Date: 2009-07-08
广东华南精细化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of flame retardants, there is no precedent for the application of rare earth elements. How to combine rare earth elements and halogen-free flame retardants to meet the requirements of low toxicity, low smoke and harmlessness while taking into account the flame retardant effect is an update. research topic

Method used

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  • Rear earth organic phosphonate flame retardant, synthesizing method and use thereof
  • Rear earth organic phosphonate flame retardant, synthesizing method and use thereof
  • Rear earth organic phosphonate flame retardant, synthesizing method and use thereof

Examples

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Effect test

Embodiment 1

[0063] Embodiment 1, the synthesis of lanthanum bismethylphosphonate

[0064] Adding 94g bismethylphosphonic acid and 500ml concentration in the reactor is 15% ethanol aqueous solution, the bismethylphosphonic acid structural formula is as shown in general formula (IV), R 1 , R 2 For methyl. Under stirring, 20% sodium hydroxide aqueous solution containing 44 g of sodium hydroxide was added, and it was made to react at 70 degreeC for 2 hours. Then add 20% aqueous solution of lanthanum chloride containing 245.5g of lanthanum chloride, adjust the pH value of the solution to 7-8 with sodium hydroxide solution, and stir for 2 hours at 20-30°C. After the reaction, filter, dry, and pulverize to obtain 244.2 g of lanthanum bismethylphosphonate with a yield of 91.8%.

Embodiment 2

[0065] Embodiment 2, the synthesis of bis-tert-butylphosphonic acid gadolinium

[0066] Add 178g bis-tert-butylphosphonic acid and 1000ml concentration in the reactor and be 15% ethanol aqueous solution, bis-tert-butylphosphonic acid structural formula is as shown in general formula (IV), R 1 , R 2 For tert-butyl. Under stirring, 20% sodium hydroxide aqueous solution containing 44 g of sodium hydroxide was added, and it was made to react at 60 degreeC for 2 hours. Then add 20% gadolinium chloride aqueous solution containing 263.75g of gadolinium chloride, then adjust the pH value of the solution to 7-8 with sodium hydroxide solution, and stir at 60° C. for 2 hours. After the reaction, filter, dry, and pulverize to obtain 332.2 g of gadolinium bis-tert-butylphosphonate with a yield of 90.2%.

Embodiment 3

[0067] Embodiment 3, the synthesis of bisethoxylanthanum phosphate

[0068] Adding 154g diethoxy phosphoric acid and 800ml concentration in the reactor is 15% isopropanol solution, its structural formula is as shown in general formula (IV), R 1 , R 2 For ethoxy. Under stirring, 20% sodium hydroxide aqueous solution containing 44 g of sodium hydroxide was added, and it was made to react at 60 degreeC for 1 hour. Then add 15% lanthanum chloride aqueous solution containing 245.5g lanthanum chloride, then adjust the pH value of the solution to 7-8 with sodium hydroxide solution, and stir at 60°C for 2 hours. After the reaction, filter, dry, and pulverize to obtain 297.3 g of bisethoxylanthanum phosphate, with a yield of 91.2%.

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Abstract

The invention relates to organic phosphonic (phosphoric) acid rare-earth salt fire retardant and a synthetic method and application thereof, which belongs to the fields of fine chemical and macromolecular materials. The low-toxic, low-smoke, environment-friendly and efficient fire retardant is formed by combining with rare earth elements in organic phosphonic (phosphoric) acid structure. Compared with the organic phosphorous compound, the fire retardant has extremely high stability at normal temperature and plastic processing temperature; moreover, the use of rare earth elements ensures that the fire retardant and other components in macromolecular material are formed into a combination having better effects than Van Der Waals Force, hydrogen bond and the like; particularly, when mixed with other components of inflatable composite fire retardant, the fire retardant can obtain better synergic effects than currently used phosphinates such as aluminum phosphinate, zinc phosphinate and the like; moreover, the obtained macromolecular material can maintain better physical and mechanical properties.

Description

Technical field: [0001] The invention relates to the fields of fine chemicals and polymer materials, in particular to a phosphorus-based flame retardant applied to polymers and a synthesis method thereof. Background technique: [0002] 1. Development of flame retardants [0003] Polymer materials are materials formed by long carbon chain molecules mainly composed of carbon and hydrogen elements, and are flammable, especially polymers such as polyethylene (PE), polypropylene (PP), and polyvinyl chloride (PVC). While burning, it not only caused a lot of losses, but also released a large amount of smoke and poisonous gas to varying degrees, causing casualties. This makes flame retardants one of the necessary functional additives for polymer materials. At present, the amount of flame retardants used is second only to plasticizers dedicated to PVC in terms of quality and value. [0004] Flame retardants are divided into inorganic flame retardants and organic flame retardants. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5317C07F9/30C07F9/11C07F9/12
Inventor 陈宇王朝晖
Owner 广东华南精细化工研究院有限公司
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