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A kind of flame-retardant thermoplastic polyurethane elastomer and preparation method thereof

A thermoplastic polyurethane and elastomer technology, which is applied in the field of flame-retardant thermoplastic modification, can solve the problems of reduced breaking strength and large amount of flame retardant addition, and achieve the effects of reducing viscosity, improving processing performance, and improving vertical combustion performance

Active Publication Date: 2017-07-07
ZIBO HENGJIU PU 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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  • A kind of flame-retardant thermoplastic polyurethane elastomer and preparation method thereof
  • A kind of flame-retardant thermoplastic polyurethane elastomer and preparation method thereof
  • A kind of flame-retardant thermoplastic polyurethane elastomer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The mass ratio accounts for the hollow glass microsphere (6019) of 0.1wt% of the total mass of the system, the polypropylene of 75wt%, the pentaerythritol of 6.225wt% and the ammonium polyphosphate of 18.675wt% add in the banbury mixer, at 170 ℃ and the rotating speed is 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

[0043] The mass ratio accounts for the hollow glass microsphere (6019) of 0.2wt% of the total mass of the system, the polypropylene of 75wt%, the pentaerythritol of 6.2wt% and the ammonium polyphosphate of 18.6wt% are added in the internal mixer, at 170 ℃ and rotating speed is 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

[0045] The mass ratio accounts for the hollow glass microsphere (6019) of 0.4wt% of system gross mass, the polypropylene of 75wt%, the pentaerythritol of 6.15wt% and the ammonium polyphosphate of 18.45wt% join in internal mixer, at 170 ℃ and rotating speed are 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 flame-retardant thermoplastic polyurethane elastomer and a preparation method thereof. The invention adopts the expanded flame-retardant polypropylene and thermoplastic polyurethane elastomer composite material prepared by the composite expanded flame retardant, and its vertical burning test level is improved to V-0 level, and a dense expanded carbon layer is formed on the surface of the sample, which has a good performance Flame retardant effect. The use of hollow glass microspheres and intumescent flame retardants to synergistically flame-retardant polypropylene and thermoplastic polyurethane elastomers not only greatly improves the oxygen index of the composite material, but also significantly improves the vertical combustion performance reflecting the droplet resistance, which can be very good It reduces the heat release rate and has a significant smoke suppression effect. It can also significantly reduce the viscosity of the polymer melt and improve the processing performance.

Description

[0001] This application is a branch of a Chinese patent application titled "Composite Intumescent Flame Retardant and Its Application in Flame Retardant Polypropylene and Polyurethane", the application number is "201310239417.9", and the application date is "June 17, 2013". case application. technical field [0002] 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 [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08K7/28C08K3/32C08K5/053C08K5/3492C08K13/04
Inventor 陈希磊焦传梅卓金龙李少香钱翌
Owner ZIBO HENGJIU PU TECH
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