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Novel phosphorous siliciferous flame retardant and preparation method thereof

A silicon flame retardant and a new technology are applied in the field of new phosphorus-containing silicon flame retardants and their preparation, which can solve the problems of low flame retardant efficiency, poor thermal deformation resistance, large filling amount, etc., and achieve excellent flame retardant performance. Effect

Inactive Publication Date: 2012-06-13
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Magnesium hydroxide flame retardant MDH, as an environmentally friendly flame retardant and smoke suppressant, is one of the leaders in the future flame retardant market. However, MDH-filled halogen-free flame-retardant polyolefin cable materials also have their disadvantages. The main reason is that the flame retardant efficiency is low, the filling amount is large, and the thermal deformation resistance is poor, which seriously affects its scope of use.

Method used

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  • Novel phosphorous siliciferous flame retardant and preparation method thereof
  • Novel phosphorous siliciferous flame retardant and preparation method thereof
  • Novel phosphorous siliciferous flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Add pentaerythritol PER (68g, 0.5mol) in a 500ml three-neck round bottom flask, and add phosphorus oxychloride POCl dropwise while maintaining room temperature and stirring slowly 3 (460g, 3.0mol), stirred at 25°C for 1 hour; then slowly raised the temperature to 80°C, and stirred for about 8 hours until no hydrogen chloride gas was released. The mixture was filtered and washed with chloroform and acetone several times, then moved to a vacuum oven and dried at 60°C to constant weight to obtain a white powdery substance, namely double spiro ring SPDPC, with a measured melting point of 235.4-237.2°C. The rate is about 78%. figure 1 for POCl 3 , the infrared spectrogram (FTIR) of PER and SPDPC; figure 2 It is the comparison chart of the proton nuclear magnetic resonance spectrum (DMSO-d6) of PER (a) and SPDPC (b); image 3 for POCl 3 (a) and SPDPC (b) nuclear magnetic resonance phosphorus spectrum (DMSO-d6) comparison chart.

[0049](2) Add DOPO (108.0g, 0.5mol),...

Embodiment 2

[0058] (1) Add 1 mol of pentaerythritol PER to a three-neck round bottom flask, and add phosphorus oxychloride POCl dropwise while maintaining room temperature and stirring slowly 3 2mol, stirred at room temperature for 2 hours; then slowly warmed up to 100°C, and stirred for another 6 hours until no hydrogen chloride gas was released. After the mixture was filtered, it was washed three times with chloroform and acetone, and then moved to a vacuum oven at 50° C. to dry to constant weight to obtain a white powdery substance, namely double spiro ring SPDPC, with a yield of about 75%.

[0059] (2) Add DOPO 1mol, vinyldimethoxysilane VMDMS 1.5mol, solvent chloroform 5mol and initiator AIBN respectively in the three-necked round bottom flask, under the conditions of mechanical stirring and nitrogen protection, gradually warm up to the boiling point of chloroform (62 ℃), keep reflux for 10h; then add KOH (5%, wt) aqueous solution, continue to stir and react under nitrogen protectio...

Embodiment 3

[0062] (1) Add 1 mol of pentaerythritol PER to a three-neck round bottom flask, and add phosphorus oxychloride POCl dropwise while maintaining room temperature and stirring slowly 3 4mol, stirred at room temperature for 1.5 hours; then slowly warmed up to 90°C, and stirred for another 9 hours until no hydrogen chloride gas was released. After the mixture was filtered, it was washed four times with chloroform and acetone, and then moved to a vacuum oven at 55° C. to dry to constant weight to obtain a white powdery substance, namely double spiro ring SPDPC, with a yield of about 76%.

[0063] (2) Add DOPO 1mol, vinyldimethoxysilane VMDMS 1.2mol, solvent chloroform 6mol and initiator AIBN respectively in the three-necked round bottom flask, under the conditions of mechanical stirring and nitrogen protection, gradually warm up to the boiling point of chloroform (62 ℃), keep reflux for 13h; then add KOH (5%, wt) aqueous solution, continue to stir and react under nitrogen protectio...

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Abstract

The invention discloses a novel phosphorous siliciferous flame retardant comprising repeated structural units shown in a figure, wherein m ranges from 2 to 4, and n ranges from 5 to 8. The invention further discloses a preparation method for the novel phosphorous siliciferous flame retardant. The phosphorous siliciferous flame retardant disclosed by the invention contains a bis-spiral structure and a DOPO lateral group, can be used for polyolefin cable materials to endow the polyolefin cable materials with very excellent flame retardant property. Besides, compared with the traditional flame retardant, the novel phosphorous siliciferous flame retardant has the characteristics of zero halogen, low smoke, low toxicity, environmental friendliness and the like, and is suitable for polymer materials such as plastic, rubber, fiber and the like.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a novel phosphorus-containing and silicon-containing flame retardant suitable for polyolefin cable materials and a preparation method thereof. Background technique [0002] The conventional flame retardant method of polymer materials is to add various flame retardants for flame retardant, but as the requirements for high-performance, high-efficiency, and environmentally friendly polymer flame retardant systems increase, the flame retardant evaluation methods are continuously improved and more scientific. As well as the increasingly stringent flame retardant regulations of various countries in the world, the traditional halogen and other flame retardant systems have been severely challenged. Therefore, it is very necessary and urgent to develop and use a new type of environmentally friendly halogen-free, low-smoke, low-toxicity polymer flame retardant system suitable for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5435C08G79/04C07F9/6574C08L23/00C08L85/02D01F1/07
Inventor 王立春霍瑞美江平开吴新锋李雅南李密
Owner SHANGHAI JIAO TONG UNIV
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