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Phosphonitrile structure and siloxane structure containing flame retardant and preparation method

A technology of flame retardant and siloxane, which is applied in the field of synthesis of new halogen-free flame retardants, can solve the problems of affecting the impact strength of materials, large amount of flame retardants added, poor flame retardant stability, etc., and achieves easy industrial production , good thermal stability and high flame retardant efficiency

Inactive Publication Date: 2020-11-24
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although phosphorus-based flame retardants are the most widely used, they affect the impact strength of the material and reduce the hydrolytic stability and heat distortion temperature of PC due to the large amount of flame retardants added; although silicon-based flame retardants can meet the requirements of flame retardancy, environmental protection and Transparency is required, but the production cost is high; although the addition of sulfonate flame retardants is small, the hydrolytic stability is poor, and the long-term flame retardant stability in the product is poor; boron flame retardants need to be combined with other types of flame retardants The required flame retardant requirements can only be achieved by the compounding of flame retardants; the research on phosphorus-nitrogen flame retardants has become a hot spot, but industrial production and large-scale application have not yet been realized; the impact of nanocomposite and other inorganic system flame retardants on the transparency of materials bigger

Method used

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  • Phosphonitrile structure and siloxane structure containing flame retardant and preparation method
  • Phosphonitrile structure and siloxane structure containing flame retardant and preparation method
  • Phosphonitrile structure and siloxane structure containing flame retardant and preparation method

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Embodiment 1

[0034] This embodiment provides a flame retardant containing a phosphazene structure and a siloxane structure, and the chemical formula of the flame retardant is as follows:

[0035]

[0036] where R is aminopropyltriethoxysilane (NHCH 2 CH 2 Si(CH 2 CH 3 ) 3 ) or aminopropyltrimethoxysilane (NHCH 2 CH 2 Si(CH 3 ) 3 ).

Embodiment 2

[0038] Based on the same inventive concept, see figure 1 As shown, this embodiment provides a flame retardant containing a phosphazene structure and a siloxane structure, including the following steps:

[0039] S1: hexachlorophosphazene is added in acetone solution and dissolves, and wherein raw material hexachlorophosphazene is purchased from Shanghai Mokai Biotechnology Co., Ltd., and its CAS number is 940-71-6, and the purity of hexachlorophosphazene is 98%; The raw material acetone is Sinopharm reagent, and its purity is greater than or equal to 99.5%. The specific operation of step S1 is:

[0040] Dissolve hexachlorophosphazene in acetone, and stir it with a magnetic stirrer for 20 minutes to fully dissolve it. During the dissolution process, use a film to seal the beaker to prevent excessive volatilization of acetone;

[0041] In this embodiment, the mass ratio of acetone to hexachlorophosphazene is 1:5-10, preferably 1:7;

[0042] S2: Add γ-aminopropyltriethoxysilane ...

Embodiment 3

[0055] Based on the same inventive concept, the present embodiment provides a flame retardant containing a phosphazene structure and a siloxane structure, including the following steps:

[0056] S1: hexachlorophosphazene is added in acetone solution and dissolves, and wherein raw material hexachlorophosphazene is purchased from Shanghai Mokai Biotechnology Co., Ltd., and its CAS number is 940-71-6, and the purity of hexachlorophosphazene is 98%; The raw material acetone is Sinopharm reagent, and its purity is greater than or equal to 99.5%. The specific operation of step S1 is:

[0057] Dissolve hexachlorophosphazene in acetone, and stir it with a magnetic stirrer for 20 minutes to fully dissolve it. During the dissolution process, use a film to seal the beaker to prevent excessive volatilization of acetone;

[0058] In this embodiment, the mass ratio of acetone to hexachlorophosphazene is 1:6-10, preferably 1:7;

[0059] S2: Add γ-aminopropyltrimethoxysilane dropwise to the ...

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Abstract

The invention discloses a preparation method for a phosphonitrile structure and siloxane structure containing flame retardant. The preparation method comprises the steps of firstly, adding hexachlorophosphonitrile into an acetone solution for dissolving, then, dropwise adding gamma-aminopropyl triethoxysilane or gamma-aminopropyl trimethoxysilane into the hexachlorophosphonitrile solution for a reaction, then, adding aluminum oxide to remove colored impurities from the mixed solution, then, dropwise adding sodium hydroxide to adjust a pH value of the mixed solution to be neutral, carrying outdistilling to remove acetone from the mixed solution, finally, subjecting the mixed solution to reduced-pressure suction filtration, and carrying out drying, thereby preparing the flame retardant. Theflame retardant is white in appearance, good in thermal stability and high in flame-retardant efficiency; and the preparation method is readily available in employed raw materials and advanced in process and facilitates industrial production.

Description

technical field [0001] The invention belongs to the field of synthesis of novel halogen-free flame retardants, in particular to a flame retardant containing phosphazene structure and siloxane structure and a preparation method. Background technique [0002] Polymer materials are widely used in all kinds of daily chemicals and industrial chemicals. Due to their flammability, they increase the probability of fires and lay a serious safety hazard for consumers in their daily lives. Therefore, the use of flame retardant materials with added flame retardants in workplaces and residences will provide reliable safety for people's production and life. Polycarbonate (PC) is a thermoplastic engineering plastic with excellent comprehensive properties. It is widely used in electronics, electrical appliances, aerospace, machinery due to its high impact strength, high light transmittance, good processing dimensional stability, and easy coloring. and other industries. Although the flame ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6593C08K5/544C08L23/12
CPCC07F9/65815C08L2201/02
Inventor 刘术敬朱鹏扈昊宋非凡李银王满鑫
Owner SHANGHAI INST OF TECH