Flame-retardant polypropylene composition with high glow-wire ignition temperature

A flame-retardant polypropylene and high-glow wire technology, applied in the field of polypropylene compositions, can solve the problems of poor durability of auxiliary materials, unsuitable polypropylene materials, low ignition temperature of high-glow wires, etc., and achieves the effect of reducing heat conduction

Active Publication Date: 2012-07-11
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The shortcomings of the above existing technologies are that the ignition temperature of the high glow wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of high-efficiency composite flame retardant: mix the components of nitrogen-phosphorus flame retardant, mineral reinforcing agent and silicone resin modifier according to the ratio in Table 1 by weight percentage, and then mix them in a high-speed mixer for 1 ~3 minutes;

[0041] (2) Proportionally mix polypropylene, brominated flame retardant, flame retardant synergist, high-efficiency composite flame retardant, primary antioxidant, auxiliary antioxidant and processing aids evenly by weight percentage;

[0042](3) Use a twin-screw extruder for melt blending, the temperature is controlled at 180-200°C, the screw speed is 100-300r / min, the components are mixed evenly by screw shearing and mixing, and then granulation, Made by drying.

Embodiment 2

[0044] (1) Preparation of high-efficiency composite flame retardant: mix the components of nitrogen-phosphorus flame retardant, mineral reinforcing agent and silicone resin modifier according to the ratio in Table 1 by weight percentage, and then mix them in a high-speed mixer for 1 ~3 minutes;

[0045] (2) Proportionally mix polypropylene, brominated flame retardant, flame retardant synergist, high-efficiency composite flame retardant, primary antioxidant, auxiliary antioxidant and processing aids evenly by weight percentage;

[0046] (3) Use a twin-screw extruder for melt blending, the temperature is controlled at 180-200°C, the screw speed is 100-300r / min, the components are mixed evenly by screw shearing and mixing, and then granulation, Made by drying.

Embodiment 3

[0048] (1) Preparation of high-efficiency composite flame retardant: mix the components of nitrogen-phosphorus flame retardant, mineral reinforcing agent and silicone resin modifier according to the ratio in Table 1 by weight percentage, and then mix them in a high-speed mixer for 1 ~3 minutes;

[0049] (2) Proportionally mix polypropylene, brominated flame retardant, flame retardant synergist, high-efficiency composite flame retardant, primary antioxidant, auxiliary antioxidant and processing aids evenly by weight percentage;

[0050] (3) Use a twin-screw extruder for melt blending, the temperature is controlled at 180-200°C, the screw speed is 100-300r / min, the components are mixed evenly by screw shearing and mixing, and then granulation, Made by drying.

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PUM

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Abstract

The invention discloses a flame-retardant polypropylene composition with high glow-wire ignition temperature (GWIT). The composition is characterized by comprising the following components in percentage by weight: 35.0 to 66.5 percent of polypropylene, 15.0 to 20.0 percent of brominated flame retardants, 3.0 to 8.0 percent of flame-retardant synergist, 15.0 to 35.0 percent of high-efficiency composite flame retardant, 0.1 to 0.5 percent of primary antioxidant, 0.1 to 0.5 percent of auxiliary antioxidant and 0.3 to 1.0 percent of processing aid. The composition has the advantages that: a) the composite flame retardant can achieve a microcapsule coating effect around the composite flame retardant, and the heat is taken away and the heat conduction is reduced by isolating oxygen; b) ultrafine magnesium hydroxide can generate metal oxide to reduce heat conduction in the heating process of a glow wire, and produce steam which can take away the heat, and the surface treatment of the precipitated ultrafine magnesium hydroxide slightly affects the mechanical properties of the flame-retardant modified polypropylene composition; and c) an organosiloxane polymer with high polymerization degree can form a silicon carbide gel isolation layer to isolate oxygen and achieve a flame-retardant effect, the GWIT is higher than required 750 DEG C, and the composition is widely applied to the fields of machinery, industry and the like.

Description

technical field [0001] The invention discloses a polypropylene composition, in particular a flame-retardant polypropylene composition with high glow wire ignition temperature. Background technique [0002] Flame-retardant polypropylene has high heat resistance, good foldability and good flame retardancy, and is widely used in the fields of electronic appliances and machinery industry. However, some components in these products, especially electronic products, may cause local overheating due to reasons such as poor contact, overload or short circuit, and may cause combustion, endangering the safe operation of the entire system. In order to prevent problems before they happen, the best way to test the fire hazard experiments of electronic and electrical products is to completely repeat the conditions that occur in reality, but in most cases it is impossible. Therefore, in order to simulate the actual conditions as much as possible, the hot Silk test is a better test method. ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L83/04C08K13/06C08K9/10C08K9/00C08K5/3492C08K5/03C08K3/22B29C47/92B29B9/06B29C48/92
CPCB29C48/0022B29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 姜向新陶四平陆湛泉肖鹏杨霄云宁凯军蔡彤旻刘奇祥
Owner KINGFA SCI & TECH CO LTD
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