Tin-phosphorus-nitrogen intumescent flame-retardant polypropylene composite material and preparation method thereof

A flame retardant polypropylene and composite material technology, applied in the field of flame retardant polypropylene composite material preparation, can solve the problems of material mechanical property damage, excessive addition, etc., to prevent flame spread, improve carbonization performance, and improve flame retardant effect of effect

Pending Publication Date: 2022-02-11
云南锡业集团(控股)有限责任公司研发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flame retardant effect of halogenated flame retardants is good, its environmental protection has been criticized and its wide application has been limited. The disadvantage of the hydroxide system is that the addition of too much will damage the mechanical properties of the material.

Method used

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  • Tin-phosphorus-nitrogen intumescent flame-retardant polypropylene composite material and preparation method thereof
  • Tin-phosphorus-nitrogen intumescent flame-retardant polypropylene composite material and preparation method thereof
  • Tin-phosphorus-nitrogen intumescent flame-retardant polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 747g of PP resin, 125g of piperazine pyrophosphate, 84g of melamine polyphosphate, 11g of pentaerythritol, and 20g of zinc stannate, place them in a drying oven at 60°C for 12 hours, then pour them into a small high-speed mixer, and then Weigh 5g tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (antioxidant 1010), 3g N,N-ethylene bisstearamide, 3g polytetrafluoroethylene Vinyl fluoride powder and 2g of vinyltrimethoxysilane were poured into a high-speed mixer and mixed at a low speed for 8 minutes; Nitrogen-expandable flame-retardant polypropylene composite material 1kg, wherein the extrusion temperature of the twin-screw extruder is 180~195℃, the speed is 40~50rpm, and the feeding speed is 4~5.5Hz;

[0026] The composite material was injected into the injection molding machine to produce a test sample, and the limiting oxygen index test, UL-94 vertical combustion level test, and flameless smoke density test were performed on it. Th...

Embodiment 2

[0028] Weigh 727g of PP resin, 140g of piperazine pyrophosphate, 93g of melamine polyphosphate, 12g of triazine char-forming agent, and 15g of zinc hydroxystannate, and place them in a drying oven at 70°C for 12 hours, then pour them into a small high-speed mixer machine, then weigh 5g of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (antioxidant 1010), 3g of N,N-ethylene bisstearamide , 3g of polytetrafluoroethylene powder, 2g of vinyltrimethoxysilane are poured into a high-speed mixer and mixed for 10 minutes at low speed; - Phosphorus-nitrogen intumescent flame-retardant polypropylene composite material 1kg, wherein the extrusion temperature of the twin-screw extruder is 180~195℃, the speed is 40~50rpm, and the feeding speed is 4~5.5Hz;

[0029]The masterbatch was injected into the injection molding machine to produce test samples, and the limiting oxygen index test, UL-94 vertical combustion level test, and flameless smoke density test we...

Embodiment 3

[0031] Weigh 747g of PP resin, 125g of piperazine polyphosphate, 84g of melamine phosphate, 11g of dipentaerythritol, and 20g of zinc stannate, place them in a drying oven and dry them at 80°C for 12 hours, then pour them into a small high-speed mixer, and then Weigh 5g tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (antioxidant 1010), 3g zinc stearate, 3g polytetrafluoroethylene powder, 2g ethylene Pour triethoxysilane into a high-speed mixer and mix at a low speed for 9 minutes; then put the mixture into a twin-screw extruder for melt blending, extrusion, and granulation to obtain tin-phosphorus-nitrogen intumescent flame-retardant polypropylene Composite material 1kg, wherein the extrusion temperature of the twin-screw extruder is 180~195℃, the speed is 40~50rpm, and the feeding speed is 4~5.5Hz;

[0032] The masterbatch was injected into the injection molding machine to produce test samples, and the limiting oxygen index test, UL-94 vertic...

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Abstract

The invention discloses a tin-phosphorus-nitrogen intumescent flame-retardant polypropylene composite material which comprises the following components in percentage by mass: 55-80% of polypropylene, 18-40% of a phosphorus-nitrogen intumescent flame retardant, 0.1-10% of a tin-based flame-retardant smoke suppressant, 0.5-1% of an antioxidant, 0.3-2% of an anti-dripping agent, 0.3-1% of a lubricant and 0.2-2% of a silane coupling agent, wherein the phosphorus-nitrogen intumescent flame retardant is prepared from a piperazine phosphate flame retardant, a melamine phosphate flame retardant and a charring agent. The phosphorus-nitrogen intumescent flame retardant and the tin-based flame-retardant smoke suppressant are compounded for use, the charring performance of the material is greatly improved, flame spreading is prevented, and the tin-based flame-retardant smoke suppressant is added, so that the tin-based flame-retardant smoke suppressant is used as a flame-retardant synergist, and meanwhile, the smoke generation amount during material combustion is effectively reduced. According to the tin-phosphorus-nitrogen intumescent flame retardant, the defects that an existing phosphorus-nitrogen flame retardant is large in adding amount, low in flame retardant efficiency, poor in smoke suppression performance and the like are overcome, and the adverse effect of the flame retardant on the mechanical performance of a resin matrix is reduced.

Description

technical field [0001] The invention belongs to the field of preparation of flame-retardant polypropylene composite materials, and in particular relates to a tin-phosphorus-nitrogen intumescent flame-retardant polypropylene composite material and its preparation method and application. Background technique [0002] In recent years, there have been many major fire safety accidents in succession, and the flame retardancy of materials has gradually attracted attention. Usually, in major fires, 75% to 80% of the fatalities are caused by inhalation of toxic gases released by burning polymer materials and shading Therefore, the preparation of flame retardants with both flame retardant and smoke suppression properties has a greater advantage in the application of flame retardant polymer materials. Polypropylene resin is a general-purpose plastic with excellent comprehensive properties. It has a wide range of uses, but its limiting oxygen index is only 17.6%. occasion use. [0003...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/02C08K5/3462C08K5/053C08K3/24C08K5/06C08K5/3492
CPCC08L23/12C08L2201/02C08L2201/22C08K13/02C08K5/3462C08K5/34928C08K5/053C08K3/24C08K5/3492C08K5/06
Inventor 马殿普李俊潘飞覃德清袁英杰符泽卫普友福白海龙彭巨擘鲍庆煌李季
Owner 云南锡业集团(控股)有限责任公司研发中心
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