1184-10-7Relevant articles and documents
Synthesis and flame retardant properties of low density polyethylene/ethylene-vinyl acetate/polyphosphazene derivative composites
Zhao, Zhengping,Zhou, Zeping,Yu, Fengying,Ji, Jianbing
, p. 919 - 924 (2015)
Polyphosphazene derivative, hexaphenoxylcyclotriphosphazene, was synthesized via hexachlorocyclotriphosphazene and phenol by nucleophilic substitution as a kind of intumescent fire retardant filling with ethylene-vinyl acetate copolymer, Mg(OH)2 and Al(OH)3 to modified low density polyethylene to study the effects of content and different polyphosphazene structure on the flame retardant properties. The LOI value increased from 17.0 to 22.2 with the hexaphenoxylcyclotriphosphazene individually. But, when composited with Mg(OH)2, Al(OH)3, the blends have better flame retardancy. The LOI value was 31.7 at the filling amount of 5 wt. % hexaphenoxylcyclotriphosphazene (M-3) and changing characteristics from V-2 (flammable material) to V-0 (flame retardant material). The maximum specific optical density decreased from 370.65 to 91.72 and the maximum flame retardant synergist index reached 3.4. SEM morphology of smoke density residue shows that hexaphenoxylcyclotriphosphazene promotes the increase of residual volume and compactness of surface layer of the solid residues.
Microwave-assisted synthesis of hexasubstituted cyclotriphosphazenes
Ye, Chengfeng,Liu, Weimin,Chen, Yunxia,Ou, Zhongwen
, p. 376 - 379 (2001)
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Fluorescence properties of fluorenylidene bridged cyclotriphosphazenes bearing aryloxy groups
?ift?i, G?nül Yenilmez,?enkuytu, Elif,Incir, Elif Saadet,Durmu?, Mahmut,Yuksel, Fatma
, p. 741 - 749 (2015)
The synthesis and characterization of the first series of aryloxy full-substituted fluorenylidene open chain and bridged cyclotriphosphazene derivatives (13-18) are reported in this study. The synthetic route utilized includes the reaction of penta-substituted cyclotriphosphazenes (5, 7, 9) with 4,4′-(9-fluorenylidene)diphenol (FDP) (11) and 4,4′-(9-fluorenylidene)dianiline (FDA) (12) to give bridged compounds (13, 15-17) and open chain compounds (14 and 18). The structural investigations of the compounds were verified by elemental analyses, mass spectrometry, UV-Vis, FT-IR, 1H and 31P NMR techniques, and X-ray crystallography (for 13 and 18). The fluorescence behavior of the studied cyclotriphosphazene derivatives were also examined in THF solution. Compound 16 showed a high emission among the studied compounds to investigate its metal sensing properties. This compound showed high selectivity for copper (Cu2+) and iron (Fe2+/Fe3+) ions in solution.
Synthesis method of hexaphenoxy cyclotriphosphazene flame retardant
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Paragraph 0024-0039, (2021/06/26)
The invention discloses a synthesis method of a hexaphenoxy cyclotriphosphazene flame retardant. The method comprises: preparing an intermediate phenoxide solution, and carrying out nucleophilic substitution on the intermediate phenoxide solution and a hexachlorocyclotriphosphazene solution; after the reaction is finished, cooling, carrying out liquid separation, filtering and separating metal halide, and recovering a solvent under reduced pressure; and precipitating, washing and refining concentrate by an alcohol/water mixed solvent, and carrying out other post-treatment processes, wherein a white powdery hexaphenoxy cyclotriphosphazene flame retardant product prepared by adopting a step-by-step one-pot boiling process is high in heat resistance, and the yield is greater than 90%. The synthesis method is energy-saving, environment-friendly, simple, convenient and safe to operate, short in reaction time, low in cost, good in product quality and suitable for large-scale production.
Method for synthesizing phenoxycycloposphazene
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Paragraph 0022-0034, (2020/02/20)
The invention discloses a method for synthesizing phenoxycycloposphazene. The method comprises the following steps: dissolving hexachlorocyclotriphosphazene and a phase transfer catalyst into an organic solvent so as to obtain an organic-phase raw material; by taking a sodium phenate aqueous solution as a water-phase raw material, simultaneously feeding the organic-phase raw material and the water-phase raw material into a multi-stage centrifugal extractor with a heating function, performing a multi-stage countercurrent reaction, dissolving generated phenoxycycloposphazene into an organic solvent to form an organic-phase reaction liquid, and dissolving generated sodium chloride into water to form a water-phase reaction liquid; and distilling the organic-phase reaction liquid supporting thephenoxycycloposphazene to remove the solvent, washing hot residues obtained after the solvent is removed by using a low-molecule alcohol, and performing solid-liquid separation after washing, so as to obtain the phenoxycycloposphazene. The method is possible in continuous production, simple in process and easy to control, and the product is high in yield and purity.
METHOD FOR PRODUCING CYCLIC ARYLOXYPHOSPHAZENE
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Paragraph 0037-0042; 0045-0047, (2020/02/19)
PROBLEM TO BE SOLVED: To provide a method for producing a cyclic aryloxyphosphazene in a short time and in high yield under a mild condition by a simple operation. SOLUTION: Provided is a method for producing a cyclic aryloxyphosphazene represented by Formula (2), comprising reacting hexachlorocyclotriphosphazene with an aryl alcohol in a nitrile only or an organic solvent mixed with 40 vol.% or more and less than 100 vol.% of a nitrile in the presence of a pellet-like material of al least one hydroxide selected from the group consisting of potassium hydroxide and sodium hydroxide. [Ar is a substituted or unsubstituted aryl group.] SELECTED DRAWING: None COPYRIGHT: (C)2020,JPO&INPIT
