NL2030235B1 - A modified melamine-phytate flame retardant, and preparation method and application thereof - Google Patents

A modified melamine-phytate flame retardant, and preparation method and application thereof Download PDF

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NL2030235B1
NL2030235B1 NL2030235A NL2030235A NL2030235B1 NL 2030235 B1 NL2030235 B1 NL 2030235B1 NL 2030235 A NL2030235 A NL 2030235A NL 2030235 A NL2030235 A NL 2030235A NL 2030235 B1 NL2030235 B1 NL 2030235B1
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flame retardant
phytate
melamine
modified melamine
metal
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NL2030235A
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NL2030235A (en
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Qian Xiaodong
Yang Zhaochun
Shi Congling
Xu Xuan
Jing Jingyun
Li Jian
Che Honglei
Liu Guolin
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China Academy Safety Science & Technology
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3477—Six-membered rings
    • C08K5/3492—Triazines
    • C08K5/34928—Salts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2248—Oxides; Hydroxides of metals of copper
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fireproofing Substances (AREA)

Abstract

The present invention provides a modified melamine-phytate flame retardant, and a preparation method and application thereof. The modified melamine-phytate flame 5 retardant is nanoparticles in appearance with a microstructure of a layered melamine phytate containing a metal salt, the metal salt being embedded in the melamine phytate. Provided in the present invention is a modified melamine-phytate flame retardant, which can act as a sheet barrier during combustion of polymers, thus blocking mass and heat transfer and delaying the exchange of pyrolysis gas with the external environment, and 10 has relatively strong selectivity and catalytic activity for toxic gas, resulting in effective suppression of smoke and reduction of toxicity during combustion of polymers, and the flame retardant can be applied in the flame retardation of polyester, polyurethane, polyamide, polyacrylate resin, polyolefln and rubber materials.

Description

A MODIFIED MELAMINE-PHYTATE FLAME RETARDANT, AND
PREPARATION METHOD AND APPLICATION THEREOF
FIELD OF TECHNOLOGY
[0001] The present invention relates to the field of retardants, and particularly to a modified melamine-phytate flame retardant, and a preparation method and application thereof.
BACKGROUND
[0002] Polymer materials such as polyester, polyurethane, polyamide, polyacrylate resin and polyolefin materials or rubber are not only flammable during a fire, but also release large amounts of smoke during combustion. Flame retardation of the polymers are typically achieved by combining the polymers with some phosphorus- containing compounds, halogen-containing compounds, or mixtures thereof.
[0003] Melamine (MA) and salts thereof belong to the nitrogen and nitrogen- phosphorus flame retardants. Comprising an acid source and a blowing source, melamine salts are characterized by zero halogen, low smoke, low toxicity, good compatibility with substrates, good thermal stability, small amount of addition, low water solubility, excellent flame retardancy, etc., thus being an important component of intumescent halogen-free flame retardants. Melamine and salts thereof are a environmentally friendly halogen-free flame retardant, which are typically white powders in appearance, and widely used in thermoplastic and thermosetting plastics, as well as products like rubber and fiber, wherein an excellent flame-retardation effect is shown on glass fiber reinforced nylon 6. While melamine and salts thereof have good flame retardancy as intumescent halogen-free flame retardants, meeting the requirements of green chemistry, there are defects therein such as low flame-retardation efficiency and poor smoke-suppression performance, which seriously restrict the application thereof.
[0004] Therefore, it has become a focus of future development of halogen-free flame retardants to modify flame retardants on prior basis, thus improving their flame- retardation efficiency and smoke-suppression performance to the maximum extent.
SUMMARY
[0005] In view of the drawbacks in the prior art, the present invention provides a modified melamine-phytate flame retardant, and a preparation method and application thereof.
[0006] The following technical scheme is adopted in the present invention:
[0007] Provided in the present invention is a modified melamine-phytate flame retardant which is nanoparticles in appearance with a microstructure of a layered melamine phytate comprising a metal salt, the metal salt being embedded in the melamine phytate.
[0008] Melamine phytate, after modification thereof by combining with a metal salt in the present invention, can act as a sheet barrier during the combustion of polymers because of the special structure thereof, thus blocking mass and heat transfer and delaying the exchange of pyrolysis gases with the external environment, and has relatively strong selectivity and catalytic activity for toxic gas, resulting in effective suppression of smoke and reduction of toxicity during the combustion of polymers. The nano-flame retardant shows good dispersion when added to a polymer substrate, and a relatively good effect of flame retardation and smoke suppression can be achieved with a small amount of addition.
[0009] Preferably, the mass ratio between the melamine phytate and the metal salt is 5~50:1.
[0010] Preferably, the metal in the metal salt is one or more selected from magnesium, calcium, strontium, barium, aluminum, tin, cerium, and transition metals.
[0011] Further preferably, the metal in the metal salt is selected from copper, iron and titanium.
[0012] Further provided in the present invention is a preparation method of the modified melamine-phytate flame retardant.
[0013] The preparation method provided in the invention comprises: dispersing melamine and a metal-containing compound in water, adding phytic acid for reaction at 50~95°C, and adjusting the pH of the solution to 6.5~7.5 after the reaction, followed by filtration, drying and crushing sequentially, wherein the metal-containing compound refers to a compound that can react to produce a corresponding metal salt.
[0014] The above-mentioned modified melamine-phytate flame retardant can be obtained in a simple and controlled manner with a high yield by the preparation method of the present invention.
[0015] Preferably, the metal-containing compound is a metal oxide or metal hydroxide. Specifically, the metal oxide may be one or more selected from alumina hydroxide, aluminum oxide, magnesium oxide, zinc oxide, calcium oxide, cerium oxide, ferric oxide, ferroferric oxide, titanium dioxide, barium oxide, strontium oxide, osmium oxide and osmium tetraoxide; and the hydroxide may be one or more selected from aluminum hydroxide, zinc hydroxide, cerium hydroxide, ferric hydroxide, calcium hydroxide, strontium hydroxide, copper hydroxide, titanium hydroxide and tin hydroxide.
[0016] Preferably, the mole ratio between the phytic acid and the melamine is 1.0.5~1.
[0017] Preferably, the mole ratio between the phytic acid and the metal- containing compound is 1:0.01~0.2.
[0018] Preferably, the phytic acid is added dropwise for a more thorough reaction.
[0019] Further provided in the present invention is an application of the modified melamine-phytate flame retardant in improving flame retardancy and performance in smoke suppression and toxicity reduction of polymer materials such as polyester, polyurethane, polyamide, polyacrylate resin, polyolefin and rubber.
[0020] Specifically, the above-mentioned flame retardant can be added to a polymer substrate alone or in combination with other flame retardants. Since the modified melamine-phytate flame retardant provided in the present invention shows a good flame retardation effect and good dispersion when added to polymer substrates, it can be used alone by being added in an amount of 1-30 wt. %.
[0021] Preferably, the modified melamine-phytate flame retardant is added to polyolefin in an amount of 15-30 wt. %.
[0022] The modified melamine-phytate flame retardant is added to epoxy in an amount of from 5 wt.% to 20 wt. %.
[0023] The modified melamine-phytate flame retardant is added to a polyester or polyamide material in an amount of from 10 wt. % to 30 wt. %.
[0024] The present invention provides a modified melamine-phytate flame retardant, which can act as a sheet barrier during combustion of polymers, thus blocking mass and heat transfer and delaying the exchange of pyrolysis gas with the external environment, and has stronger selectivity and catalytic activity for toxic gas, resulting in effective suppression of smoke and reduction of toxicity during combustion of polymers, and can be applied in the flame retardation of polyester, polyurethane, polyamide,
polyacrylate resin, polyolefin and rubber materials.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Fig. 1 shows a scanning electron microscope (SEM) image of the modified melamine-phytate flame retardant of Embodiment 1 of the present invention.
DESCRIPTION OF THE EMBODIMENTS
[0026] To clarify the purpose, technical scheme and advantages of the embodiments of the present invention, a clear and complete description of the technical schemes in the embodiments of the present invention is provided hereinafter. It is obvious that the embodiments described are a portion and not all of the embodiments of the present invention. All the other embodiments achieved by a person having ordinary skills in the art based on the embodiments of the present invention, given no inventive efforts, are within the scope of the present invention.
[0027] Embodiment 1
[0028] Provided in the embodiment is a modified melamine-phytate flame retardant, the preparation method thereof being as follows:
[0029] Eight hundred ml of deionized water was transferred to a 2 L three-neck flask fitted with a mechanical stirrer, which was heated to 80°C in a water bath; 47.5 g of melamine and 2.5 g of copper hydroxide were transferred to the three-neck flask and stirred, and 82.5 g of phytic acid solution (70%) was slowly dripped to the three-neck flask; the temperature of the water bath was maintained at 80°C while stirring continuously for 1 h to fully form a suspension; the pH value of the whole system was controlled between 6.5 and 7.5 by adding an appropriate amount of sodium hydroxide dropwise. The system was cooled to room temperature after the reaction, and washed several times by repeated filtration with a Buchner funnel and a recirculating water vacuum pump, the obtained product being dried in a drying oven at 80°C for 24 hours before being taken out. The yield rate was 87%.
[0030] The structure of the product is shown in Fig. 1. As shown in the figure, the microstructure thereof is a layered structure with the metal salt embedded in the melamine phytate.
[0031] The analysis results of the main elements of the product are shown in
Table 1:
[0032] Table 1 The analysis results of the main elements of the product in
Embodiment 1
[0033]
Element NO CP Cu
Mass fraction (%) 39.00 19.40 37.99 2.05 1.39
[0034] Fifteen grams of the modified melamine-phytate flame retardant prepared above and 80 g of epoxy were mixed well at 60°C, 17.4g of 44- diaminodiphenylmethane was added as a curing agent and the anti-flaming resin liquid was then poured into a mold of 8 cm in length, 3 cm in width and 3 cm in thickness; the temperature was elevated to 100°C and maintained for 2 h, then elevated to 150°C and maintained for 2 hours before being cooled to room temperature and demolded to obtain a specimen. The specimen was subjected to a UL-94 vertical burn testing and rated VO.
The oxygen index of the specimen was measured with an oxygen index meter, demonstrating a value of 33. It can be seen from the UL-94 testing and the oxygen index measurement that, the modified melamine-phytate flame retardant prepared in the embodiment showed a good flame-retardation effect on epoxy.
[0035] According to the measurement of smoke density testing, the smoke density dropped by 41%, demonstrating a good smoke-suppression and toxicity- reduction effect on epoxy by the modified melamine-phytate flame retardant prepared in the embodiment.
[0036] Embodiment 2
[0037] Provided in the embodiment is a modified melamine-phytate flame retardant, the preparation method thereof being as follows:
[0038] Eight hundred ml of deionized water was transferred to a 2 L three-neck flask fitted with a mechanical stirrer, which was heated to 90°C in a water bath; 47.5 g of melamine and 3.5 g of ferric hydroxide were transferred to the three-neck flask and stirred, and 82.5 g of phytic acid solution (70%) was slowly dripped to the three-neck flask; the temperature of the water bath was kept at 90°C while stirring continuously for 1 hour to fully form a suspension; the pH value of the whole system was controlled between 6.5 and 7.5 by adding an appropriate amount of sodium hydroxide dropwise.
The system was then cooled to room temperature after the reaction, and washed several times by repeated filtration with a Büchner funnel and a recirculating water vacuum pump, the obtained product being dried in a drying oven at 60°C for 24 hours before being taken out. The yield rate was 91%.
[0039] One hundred and forty grams of the modified melamine-phytate flame retardant prepared above and 860 g of PA6 were mixed well and placed in a twin-screw extruder for extrusion and pelletizing at a unit temperature of 220-240°C, a die temperature of 230°C and a screw speed of 240rpm, followed by drying and cooling so that anti-flaming PAG pellets were obtained. The specimen was subjected to a UL-94 vertical burn testing and rated VO. The oxygen index of the specimen was measured with a limiting oxygen index meter, demonstrating a value of 30.5. It can be seen from the
UL-94 testing and the oxygen index measurement that, the flame retardant showed a good flame-retardation effect on PAG.
[0040] According to the measurement of smoke density testing, the smoke density dropped by 52%, demonstrating a good smoke-suppression and toxicity- reduction effect on PA6 by the modified melamine-phytate flame retardant prepared in the embodiment.
[0041] Embodiment 3
[0042] Provided in the embodiment is a modified melamine-phytate flame retardant, the preparation method thereof being as follows:
[0043] Eight hundred ml of deionized water was transferred to a 2 L three-neck flask fitted with a mechanical stirrer, which was heated to 70°C in a water bath; 47.5 g of melamine and 1.5 g of ferroferric oxide were transferred to the three-neck flask and stirred, and 82.5 g of phytic acid solution (70%) was slowly dripped to the three-neck flask; the temperature of the water bath was maintained at 70°C while stirring continuously for 1 h to fully form a suspension; the pH value of the whole system was controlled between 6.5 and 7.5 by adding an appropriate amount of sodium hydroxide dropwise. The system was cooled to room temperature after the reaction, and washed several times by repeated filtration with a Büchner funnel and a recirculating water vacuum pump, the obtained product being dried in a drying oven at 80°C for 24 hours before being taken out. The yield rate was 91%.
[0044] Two hundred and fifty grams of the modified melamine-phytate flame retardant prepared above and 750 g of PP were mixed well and placed in a twin-screw extruder for extrusion and pelletizing at a unit temperature of 180-200°C, a die temperature of 185°C and a screw speed of 230rpm, followed by drying and cooling so that anti-flaming PP pellets were obtained. The specimen was subjected to a UL-94 vertical burn testing and reached a rating of VO. The oxygen index of the specimen was measured with a limiting oxygen index meter, demonstrating a value of 32.5. It can be seen from the UL-94 and the oxygen index testing that, the flame retardant showed a good flame-retardation effect on PP.
[0045] It can be seen from the measurement of smoke density testing that, the smoke density dropped by 45%, demonstrating a good smoke-suppression and toxicity- reduction effect on PP by the modified melamine-phytate flame retardant prepared in the embodiment.
[0046] Embodiment 4
[0047] Provided in the embodiment is a modified melamine-phytate flame retardant, the preparation method thereof being as follows:
[0048] Eight hundred ml of deionized water was transferred to a 2 L three-neck flask fitted with a mechanical stirrer, which was heated to 70°C in a water bath; 47.5 g of melamine and 3.0 g of titanium hydroxide were transferred to the three-neck flask and stirred, and 82.5 g of phytic acid solution (70%) was slowly dripped to the three-neck flask; the temperature of the water bath was maintained at 70°C while stirring continuously for 1 hour to fully form a suspension; the pH value of the whole system was controlled between 6.5 and 7.5 by adding an appropriate amount of sodium hydroxide dropwise. The system was cooled to room temperature after the reaction, and washed several times by repeated filtration with a Büchner funnel and a recirculating water vacuum pump, the obtained product being dried in a drying oven at 80°C for 24 hours before being taken out. The yield rate was 85%.
[0049] One hundred and fifty grams of the modified melamine-phytate flame retardant prepared above and 800 g of PAG were mixed well and then placed in a twin- screw extruder for extrusion and pelletizing at a unit temperature of 220-240°C, a die temperature of 230°C and a screw speed of 240rpm, followed by drying and cooling so anti-flaming PAG pellets were obtained. The specimen was subjected to a UL-94 vertical burn testing and rated VO. The oxygen index of the specimen was measured with a limiting oxygen index meter, demonstrating a value of 32.0. It can be seen from the UL- 94 and the oxygen index testing that the flame retardant showed a good flame-retardation effect on PAG.
[0050] It can be seen from the measurement of smoke density testing that, the smoke density dropped by 64%, demonstrating a good smoke-suppression and toxicity- reduction effect on PAG by the modified melamine-phytate flame retardant prepared in the embodiment.
[0051] Comparative Example 1
[0052] Provided in the comparative example is an unmodified melamine-phytate flame retardant, the preparation method thereof being as follows:
[0053] Eight hundred ml of deionized water was transferred to a 2 L three-neck flask fitted with a mechanical stirrer, which was heated to 80°C in a water bath; 47.5 g of melamine was transferred to the three-neck flask and stirred, and 47.5 g of phytic acid solution (70%) was slowly dripped to the three-neck flask; the temperature of the water bath was maintained at 80°C while stirring continuously for 1 hour to fully form a suspension; the pH value of the whole system was controlled between 6.5 and 7.5 by adding an appropriate amount of sodium hydroxide dropwise. The system was cooled to room temperature after the reaction, and washed several times by repeated filtration with a Buchner funnel and a recirculating water vacuum pump, the obtained product being dried in a drying oven at 80°C for 24 hours before being taken out. The yield rate was 81%.
[0054] The flame retardant prepared above was subjected to a UL-94 testing and oxygen index measurement according to the same method as in Embodiment |, demonstrating a UL94 rating of V1 and a limiting oxygen index (LOI) of 29. It can be seen that the performance of the modified melamine-phytate flame retardant is better than the unmodified flame retardant.
[0055] Comparative Example 2
[0056] Copper phytate and melamine phytate were mixed mechanically in an amountof4.42 g and 113.10 g, respectively, and served as a comparative flame retardant.
[0057] The above-mentioned comparative flame retardant was subjected to a
UL-94 testing and oxygen index measurement according to the same method as in
Embodiment 1, demonstrating a UL94 rating of V2 and a limiting oxygen index (LOI) of 27. It can be seen that the performance of the modified melamine-phytate flame retardant is significantly better than the flame retardant in the comparative example.
[0058] Finally, it shall be noted that the above embodiments are only adopted to illustrate the technical schemes of the present invention but not to limit them; and despite the detailed description of the present invention with reference to the preceding embodiments, it should be understood by those of ordinary skills in the art that, they can still modify the technical schemes recorded in the preceding embodiments, or make equivalent substitutions of part of the technical features thereof, however, these modifications or substitutions do not separate the essence of the corresponding technical schemes from the spirit and scope of the technical schemes of the embodiments of the present invention.

Claims (10)

CONCLUSIESCONCLUSIONS 1. Een gemodificeerde melamine-fytaat-vlamvertrager, met het kenmerk, dat de gemodificeerde melamine-fytaat-vlamvertrager een uiterlijk nanodeeltjes is met een microstructuur van een gelaagd melaminefytaat dat een metaalzout bevat, waarbij het metaalzout is ingebed in het melaminefytaat.A modified melamine phytate flame retardant, characterized in that the modified melamine phytate flame retardant is an outer nanoparticle having a microstructure of a layered melamine phytate containing a metal salt, the metal salt being embedded in the melamine phytate. 2. De gemodificeerd melamine-fytaat-vlamvertrager volgens conclusie 1, met het kenmerk, dat de massaverhouding tussen het melaminefytaat en het metaalzout 5-50:1 is.The modified melamine phytate flame retardant according to claim 1, characterized in that the mass ratio of the melamine phytate and the metal salt is 5-50:1. 3. De gemodificeerd melamine-fytaat-vlamvertrager volgens conclusie 1 of 2, met het kenmerk, dat het metaal in het metaalzout één of meer is gekozen uit magnesium, calcium, strontium, barium, aluminium, tin, cerium en overgangsmetalen.The modified melamine phytate flame retardant according to claim 1 or 2, characterized in that the metal in the metal salt is one or more selected from magnesium, calcium, strontium, barium, aluminum, tin, cerium and transition metals. 4. Een werkwijze voor de bereiding van de gemodificeerde melamine-fytaat-vlamvertrager volgens een van de conclusies 1 tot en met 3, met het kenmerk, dat de werkwijze omvat: het dispergeren van melamine en een metaalbevattende verbinding in water, het toevoegen van fytinezuur voor reactie bij 50-96°C, en het aanpassen van de pH van de oplossing tot 6,5-7,5 na de reactie, gevolgd door achtereenvolgens filtratie, wassen, drogen en pletten.A method for preparing the modified melamine phytate flame retardant according to any one of claims 1 to 3, characterized in that the method comprises: dispersing melamine and a metal-containing compound in water, adding phytic acid before reaction at 50-96°C, and adjusting the pH of the solution to 6.5-7.5 after the reaction, followed by filtration, washing, drying and crushing sequentially. 5. De werkwijze voor de bereiding volgens conclusie 4 van een gemodificeerde melamine-fytaat-vlamvertrager, met het kenmerk, dat de metaalbevattende verbinding een metaaloxide of een metaalhydroxide is.The method for preparing a modified melamine phytate flame retardant according to claim 4, characterized in that the metal-containing compound is a metal oxide or a metal hydroxide. 6. De werkwijze voor de bereiding volgens conclusie 4 of 5 van een gemodificeerde melamine-fytaat-vlamvertrager, met het kenmerk, dat de molverhouding tussen het fytinezuur en de melamine 1:0,5-1 1s.The method for the preparation according to claim 4 or 5 of a modified melamine phytate flame retardant, characterized in that the molar ratio between the phytic acid and the melamine is 1:0.5-1. 7. De werkwijze voor de bereiding volgens een van de conclusies 4 tot en met 6 van een gemodificeerde melamine-fytaat-vlamvertrager, met het kenmerk, dat de molverhouding tussen het fytinezuur en de metaalbevattende verbinding 1:0,01-0,2 is.The method for preparing a modified melamine phytate flame retardant according to any one of claims 4 to 6, characterized in that the molar ratio between the phytic acid and the metal-containing compound is 1:0.01-0.2 . 8. De werkwijze voor de bereiding volgens een van de conclusies 4 tot en met 7 van een gemodificeerde melamine-fytaat-vlamvertrager, met het kenmerk, dat het fytinezuur druppelsgewijs wordt toegevoegd.The method for the preparation according to any one of claims 4 to 7 of a modified melamine phytate flame retardant, characterized in that the phytic acid is added dropwise. 9. Een toepassing van de gemodificeerde melamine-fytaat-vlamvertrager volgens een van de conclusies 1 tot en met 3 voor het verbeteren van de vlamvertragende werking en prestatie bij rook- en toxiciteitsonderdrukking van polyester, polyurethaan, polyamide, polyacrylaathars, polyolefine of rubber.A use of the modified melamine phytate flame retardant according to any one of claims 1 to 3 for improving the flame retardancy and smoke and toxicity suppression performance of polyester, polyurethane, polyamide, polyacrylate resin, polyolefin or rubber. 10. De toepassing volgens conclusie 9, met het kenmerk, dat de gemodificeerde melamine-fytaat-vlamvertrager wordt toegevoegd aan polyolefine in een hoeveelheid van 15-30 gew.%; en/of de gemodificeerde melamine-fytaat vlamvertrager wordt toegevoegd aan epoxy in een hoeveelheid van 5-20 gew. %; en/of de gemodificeerde melamine-fytaat vlamvertrager wordt toegevoegd aan een polyester of polyamide materiaal in een hoeveelheid van 10-30 gew. %.The use according to claim 9, characterized in that the modified melamine phytate flame retardant is added to polyolefin in an amount of 15-30% by weight; and/or the modified melamine phytate flame retardant is added to epoxy in an amount of 5-20 wt. %; and/or the modified melamine phytate flame retardant is added to a polyester or polyamide material in an amount of 10-30 wt. %.
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CN115232359B (en) * 2022-08-19 2023-10-20 南京工程学院 Nitrogen-phosphorus series multielement synergistic flame retardant and preparation method thereof
CN116120640B (en) * 2023-01-10 2024-03-22 东北林业大学 Expansion type nano composite flame retardant, preparation method thereof and application thereof in wood-plastic composite material
CN116574309B (en) * 2023-07-05 2024-01-30 广州市寅源新材料股份有限公司 Halogen-free composite flame retardant, and preparation method and application thereof

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US9688867B2 (en) * 2013-09-09 2017-06-27 American University Flame retardant coatings
CN105085983A (en) * 2015-09-22 2015-11-25 清华大学深圳研究生院 Halogen-free synergistic flame retardant, preparation method and composite flame retardant
CN110951191A (en) * 2019-12-16 2020-04-03 无锡市华美电缆有限公司 Cable material containing supramolecular self-assembly flame retardant and preparation method thereof

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