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An anti-dripping integrated intumescent type halogen-free flame retardant and a preparing method thereof

An intumescent, anti-dripping technology, applied in the anti-dripping integrated intumescent halogen-free flame retardant and its preparation field, can solve problems such as troublesome handling, coarse anti-dripping agent particles, and increased water solubility, and achieve Effects of reducing water solubility, uniform and stable flame retardancy, improving processing resistance and precipitation resistance

Active Publication Date: 2018-06-15
PRESAFER QINGYUAN PHOSPHOR CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ammonium polyphosphate has certain water solubility, and it will be partially degraded after processing, which will lead to further increase of water solubility and serious precipitation in the end, so it is often necessary to coat ammonium polyphosphate to improve its water solubility, not only It is more troublesome to deal with, and the treatment effect is often very general
In addition, when people prepare flame-retardant polyolefin materials, in order to achieve a better flame-retardant effect, anti-dripping agents are usually added to improve the flame-retardant efficiency. Whether it is added during the compounding process or during the material extrusion process, the anti-dripping agent cannot be uniformly dispersed in the flame-retardant polyolefin material, which will lead to uneven and unstable flame retardancy of the splines and products. , prompting people to further increase the amount of anti-dripping agent added, which ultimately leads to an increase in production costs

Method used

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  • An anti-dripping integrated intumescent type halogen-free flame retardant and a preparing method thereof
  • An anti-dripping integrated intumescent type halogen-free flame retardant and a preparing method thereof
  • An anti-dripping integrated intumescent type halogen-free flame retardant and a preparing method thereof

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preparation example Construction

[0031] A preparation method of an anti-dripping integral expansion type halogen-free flame retardant, comprising the following steps:

[0032] 1) Add the triazine compound, dispersant and water into the reaction kettle, then add the formaldehyde solution, react at 60-100°C for 2-8 hours, and obtain the triazine compound prepolymer solution;

[0033] 2) Add phosphorus pentoxide and diammonium hydrogen phosphate into the kneader, preheat to 180-350°C, feed ammonia gas for reaction, and stop the ammonia gas flow after the reaction;

[0034] 3) Spray the polytetrafluoroethylene emulsion on the surface of the powder in the kneader by spraying equipment, heat, and feed ammonia gas for sintering;

[0035] 4) stop feeding ammonia and heating, nitrogen, obtain ammonium polyphosphate with polytetrafluoroethylene;

[0036] 5) Control the temperature in the kneader at 80-150°C, add the triazine compound prepolymer solution in step 1), react for 2-8 hours, then add curing agent, react for...

Embodiment 1

[0058] A preparation method of an anti-dripping integral expansion type halogen-free flame retardant, comprising the following steps:

[0059] 1) Add 32.2kg of triazine compound, 5kg of methanol and 25kg of water into the reactor, then add 24.35kg of formaldehyde solution with a mass fraction of 37%, and react at 80°C for 2 hours to obtain a triazine compound prepolymer solution;

[0060] 2) Add 81.44kg of phosphorus pentoxide and 79.56kg of diammonium hydrogen phosphate into the kneader, preheat to 330°C, and 3 The flow rate of / h is fed into the ammonia gas for 2 hours, and the ammonia gas is stopped after the reaction;

[0061] 3) 1.9kg polytetrafluoroethylene emulsion (DISP40, DuPont, mass fraction 60%) is evenly sprayed on the powder surface in the kneader by the spray equipment on the kneader, heated, and 3 The flow rate of / h is passed into ammonia gas for 2h, and sintering is carried out at 330°C;

[0062] 4) stop feeding ammonia gas and heating, with 3.5m 3 The flo...

Embodiment 2

[0066] A preparation method of an anti-dripping integral expansion type halogen-free flame retardant, comprising the following steps:

[0067] 1) Add 18kg of triazine compound, 2kg of ethanol and 20kg of water into the reactor, then add 32.46kg of formaldehyde solution with a mass fraction of 37%, and react at 90°C for 4 hours to obtain a triazine compound prepolymer solution;

[0068] 2) Add 74.60kg of phosphorus pentoxide and 69.40kg of diammonium hydrogen phosphate into the kneader, preheat to 280°C, and 3 The flow rate of / h is fed into the ammonia gas for 3 hours, and the ammonia gas is stopped after the reaction;

[0069] 3) Spray 1.6kg polytetrafluoroethylene emulsion (D3211, Solvay, mass fraction 60%) evenly on the powder surface in the kneader through the spray equipment on the kneader, heat, and 3 The flow rate of / h is passed into ammonia gas for 3h, and sintering is carried out at 280°C;

[0070] 4) Stop feeding ammonia gas and heating, with 2m 3 The flow rate o...

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Abstract

An anti-dripping integrated intumescent type halogen-free flame retardant and a preparing method thereof are disclosed. The method includes steps of preparing a triazine compound prepolymer solution,preparing ammonium polyphosphate comprising polytetrafluoroethylene and coating the ammonium polyphosphate with the triazine compound. In a synthesis process of the ammonium polyphosphate, the polytetrafluoroethylene is dispersed in an emulsion manner in the ammonium polyphosphate through mist spraying, and then the ammonium polyphosphate is covered with the triazine compound in a form of microcapsules, thus effectively reducing water solubility of the flame retardant, and improving processability and precipitation resistance of the flame retardant. The finally prepared flame retardant has more uniform and stable flame retardance when the flame retardant is used in polyolefin.

Description

technical field [0001] The invention relates to an anti-dripping integral expansion type halogen-free flame retardant and a preparation method thereof. Background technique [0002] Ammonium polyphosphate (APP) intumescent flame retardants have excellent flame retardant effects, especially when used in the flame retardant of polyolefin plastics such as polyethylene and polypropylene, and are currently researched in the field of halogen-free flame retardant materials. hotspot. However, ammonium polyphosphate has certain water solubility, and it will be partially degraded after processing, which will lead to further increase of water solubility and serious precipitation in the end, so it is often necessary to coat ammonium polyphosphate to improve its water solubility, not only It is more troublesome to deal with, and the treatment effect is often very general. In addition, when people prepare flame-retardant polyolefin materials, in order to achieve a better flame-retardant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08K13/06C08K9/10C08K3/32C08K5/20C08K5/134C08K5/526C08G12/32C08G12/30
CPCC08G12/30C08G12/32C08K2003/323C08L23/12C08L2201/02C08L2201/22C08L23/06C08K13/06C08K9/10C08K3/32C08K5/20C08K5/1345C08K5/526
Inventor 李章武周侃刘华夏
Owner PRESAFER QINGYUAN PHOSPHOR CHEM
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