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Compound intumescent flame retardant (IFR) and application thereof to carrying out flame retardance on polypropylene (PP) and polyurethane (PU)

An intumescent flame retardant and composite intumescent technology, which is applied in the field of flame retardant thermoplastic modification, can solve the problems of decreased breaking strength and large amount of flame retardant addition, so as to reduce viscosity, improve processing performance, and increase oxygen index Effect

Inactive Publication Date: 2013-10-02
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the polypropylene treated with an intumescent flame retardant or an intumescent flame retardant and a synergist shows good flame retardancy, low smoke, non-toxicity, and certain resistance to solvent droplets, the required amount of flame retardant added Larger, so that the mechanical properties of the material such as tensile strength and fracture strength decrease

Method used

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  • Compound intumescent flame retardant (IFR) and application thereof to carrying out flame retardance on polypropylene (PP) and polyurethane (PU)
  • Compound intumescent flame retardant (IFR) and application thereof to carrying out flame retardance on polypropylene (PP) and polyurethane (PU)
  • Compound intumescent flame retardant (IFR) and application thereof to carrying out flame retardance on polypropylene (PP) and polyurethane (PU)

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add hollow glass microspheres (6019), 75wt% polypropylene, 6.225wt% pentaerythritol and 18.675wt% ammonium polyphosphate with a mass ratio of 0.1wt% of the total mass of the system to the internal mixer. Melt blending under the condition of 30 rpm for 10 minutes to obtain flame-retardant polypropylene. Pressed and cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size is tested, the limiting oxygen index reaches 26.8, the vertical combustion level can reach UL94V-0, and the peak heat release rate is 340kW / m 2 , the total burning time is 635s.

Embodiment 2

[0042] Add hollow glass microspheres (6019) whose mass ratio accounts for 0.2wt% of the total mass of the system, 75wt% polypropylene, 6.2wt% pentaerythritol and 18.6wt% ammonium polyphosphate into the internal mixer, at 170 ° C and a speed of Melt blending under the condition of 30 rpm for 10 minutes to obtain flame-retardant polypropylene. Pressed and cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size is tested, the limiting oxygen index reaches 26.9, the vertical combustion level can reach UL94V-0, and the peak heat release rate is 329kW / m 2 , the total burning time is 565s.

Embodiment 3

[0044] The hollow glass microspheres (6019), 75wt% polypropylene, 6.15wt% pentaerythritol and 18.45wt% ammonium polyphosphate were added to the internal mixer with a mass ratio of 0.4M% of the total mass of the system. Melt blending under the condition of 30 rpm for 10 minutes to obtain flame-retardant polypropylene. Pressed and cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size is tested, the limiting oxygen index reaches 26.4, the vertical combustion level can reach UL94V-0, and the peak heat release rate is 356kW / m 2 , the total burning time is 575s.

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Abstract

The invention relates to a compound intumescent flame retardant (IFR) and an application thereof to carrying out flame retardance on polypropylene (PP) and polyurethane (PU) elastomers. The compound IFR comprises hollow glass microspheres and IFRs. The vertical flame test level of the IFR PP and thermoplastic PU (TPU) elastomer composite material prepared by adopting the compound IFR is raised to V-0, and a dense intumescent carbon layer is formed on the surface of a sample of the IFR PP and TPU elastomer composite material, so that the IFR PP and TPU elastomer composite material has a good flame retardant effect. By using the hollow glass microspheres and the IFRs to carry out synergistic flame retardance on the PP and TPU elastomers, not only is the oxygen index of the composite material increased and the vertical flammability reflecting melting and dropping resistance obviously improved, can the heat release rate be well reduced and are obvious smoke suppression effects achieved, but also the viscosity of the polymer melts can be obviously reduced and the processability can be improved.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant thermoplastic modification, and in particular relates to the compounding of hollow glass microspheres and intumescent flame retardants and their application in flame-retardant polypropylene and polyurethane elastomers. Background technique [0002] According to "Polymer Combustion and Flame Retardant Technology" (edited by Zhang Jun, Ji Kuijiang, Xia Yanzhi, etc., Chemical Press, April 2005), polypropylene itself is a flammable material, and its oxygen index is only 17.0-18.0%. The carbon rate is low, and molten droplets are generated when burning, so it is required to be flame-retardant modified in many applications. At present, the flame retardant of polypropylene is mainly used to add flame retardants at home and abroad. According to "Advanced Polymer Processing Technology" (Polymers for Advanced Technologies 21:1-26, 2009), among the halogen-free additive flame retardants that have be...

Claims

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Application Information

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IPC IPC(8): C08K7/28C08K3/32C08K5/053C08K5/3492C08L23/12C08L75/04C08K13/04
Inventor 陈希磊焦传梅卓金龙李少香钱翌
Owner QINGDAO UNIV OF SCI & TECH
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