Low-addition-amount halogen-free flame-retardant polypropylene material and preparation method thereof

A flame-retardant polypropylene and additive technology, which is applied in the field of flame-retardant materials, can solve the problems of affecting the mechanical properties of flame-retardant polypropylene, limiting the application of flame-retardant polypropylene, and increasing material costs, so as to achieve low cost and promote char formation , the effect of reducing the amount of addition

Inactive Publication Date: 2017-09-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although intumescent flame retardants have been widely used in polypropylene materials, there are still big problems, such as low flame retardant efficiency, excessive addition, poor dispersion, etc. These shortcomings directly affect the mechanical properties of flame retardant polypropylene , which greatly limits the application of flame retardant polypropylene in some fields, and the addition of a large amount of flame retardants also increases the cost of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 82.0g of polypropylene, 3.2g of pentaerythritol, 9.6g of ammonium polyphosphate, 3.2g of melamine, and 2.0g of aluminum phosphate into a high-speed mixer and mix evenly. out, and then cooled and pelletized to obtain a flame-retardant polypropylene material. Wherein, the rotational speed of the twin-screw extruder is 30rpm, and the processing temperature is 190-230°C. The obtained flame-retardant polypropylene can pass the V-0 level (3.2mm) of the UL-94 test, and the limiting oxygen index can reach 30.6%.

[0027] In the flame-retardant polypropylene material obtained in Example 1, the addition amount of the flame-retardant system is only 18.0 wt%, while most of the existing flame-retardant polypropylenes reach the V-0 level, the addition amount of the flame retardant is at least It is 25.0wt%. Therefore, the present invention significantly improves the flame retardant efficiency of the flame retardant and reduces the added amount of the flame retardant.

Embodiment 2

[0029] 82.0g polypropylene, 4.0g dipentaerythritol, 12.0g ammonium polyphosphate, and 2.0g aluminum hypophosphite were added to a high-speed mixer and mixed evenly, and the resulting mixture was added to a twin-screw extruder for blending and extrusion. Then cool and cut into pellets to obtain flame-retardant polypropylene material. Wherein, the rotational speed of the twin-screw extruder is 30rpm, and the processing temperature is 190-230°C. The obtained flame-retardant polypropylene can pass the V-0 level (3.2mm) of the UL-94 test, and the limiting oxygen index can reach 31.3%.

[0030] For the flame retardant polypropylene material obtained in Example 2, the addition amount of the flame retardant system is only 18.0wt%, while most of the existing flame retardant polypropylenes reach the V-0 level, the addition amount of the flame retardant is at least It is 25.0wt%. Therefore, the present invention significantly improves the flame retardant efficiency of the flame retardan...

Embodiment 3

[0032] Add 82.0g of polypropylene, 4.0g of triazine compounds, 12.0g of melamine phosphate, and 2.0g of aluminum diethyl hypophosphite into a high-speed mixer and mix evenly, then add the resulting mixture into a twin-screw extruder for blending , extruded, and then cooled and pelletized to obtain a flame-retardant polypropylene material. Wherein, the rotational speed of the twin-screw extruder is 30rpm, and the processing temperature is 190-230°C. The obtained flame-retardant polypropylene can pass the V-0 level (3.2mm) of the UL-94 test, and the limiting oxygen index can reach 33.0%.

[0033] For the flame-retardant polypropylene material obtained in Example 3, the addition amount of the flame-retardant system is only 18.0 wt%, while most of the existing flame-retardant polypropylenes reach the V-0 level, and the addition amount of the flame retardant is at least It is 25.0wt%. Therefore, the present invention significantly improves the flame retardant efficiency of the fla...

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Abstract

The invention discloses a low-addition halogen-free flame retardant polypropylene material and a preparation method thereof. The flame retardant polypropylene material specifically involves the following components: polypropylene, an intumescent flame retardant and a flame retardant synergist. Among them, the mass fraction of the intumescent flame retardant is 14% to 18%, the mass fraction of the flame retardant synergist is 0.5% to 3%, and the addition amount of the entire flame retardant system does not exceed 20%. The flame-retardant polypropylene material can reach the V-0 level of UL-94, the oxygen index can reach 33.5%, and it has excellent mechanical properties and low cost.

Description

[0001] technology neighborhood [0002] The invention relates to the field of flame-retardant materials, in particular to a low-addition halogen-free flame-retardant polypropylene material and a preparation method thereof. Background technique [0003] Polypropylene (PP) is a polymer of propylene. Due to its good physical and mechanical properties, heat resistance and electrical insulation, coupled with its mature production process and low price, it is widely used in packaging, textiles, building materials, Many industries such as automobiles and electronics have become one of the resins with the largest output in the world. However, since polypropylene is mainly composed of carbon and hydrogen connected by covalent bonds, the energy of these bonds is not high, and it is easy to decompose or even burn when heated, so the limiting oxygen index of PP is only 18.0% to 19.0%, which belongs to It is flammable, and it generates a large amount of molten droplets when it burns, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/02C08K5/053C08K3/32C08K5/3492C08K5/06C08K5/5313C08K5/521
CPCC08K13/02C08K3/32C08K5/053C08K5/06C08K5/3492C08K5/34922C08K5/34928C08K5/521C08K5/5313C08K2003/323C08K2003/327C08L2201/02C08L2201/22
Inventor 张胜冉国文谷晓昱孙军张庆宇孙永远
Owner BEIJING UNIV OF CHEM TECH
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