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Halogen-free flame-retardant polypropylene composite material and preparation method thereof

A flame retardant polypropylene and composite material technology, applied in the field of polymer functional materials, can solve problems such as environmental pollution and difficulty in fighting, and achieve the effects of good compatibility, enhanced mechanical properties, and obvious flame retardant effect.

Inactive Publication Date: 2019-11-19
安庆市泽烨新材料技术推广服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the most widely used halogen flame retardants, but the halogen flame retardants will release a lot of smoke and hydrogen halide gas after burning, which makes it difficult to fight fires, and the generated hydrogen halide gas will cause serious pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] In a second aspect, the present invention provides a method for preparing a halogen-free flame-retardant polypropylene composite material as described in the first aspect, comprising the following steps:

[0038] Add polypropylene resin, modified graphene, modified magnesium hydroxide, polypropylene wax, and antioxidant into a high-speed mixer and mix evenly, then transfer to a twin-screw extruder, and add glass fiber to the twin-screw extruder at the same time, Melt, mix and disperse at 160-210°C, extrude and granulate, and make a halogen-free flame-retardant polypropylene composite material through injection molding.

Embodiment 1

[0042] A preparation method of a halogen-free flame-retardant polypropylene composite material provided in this embodiment comprises the following steps:

[0043] (1) Preparation of modified magnesium hydroxide

[0044] According to the mass ratio of deionized water, tris(dioctylpyrophosphoryloxy) isopropyl titanate and magnesium hydroxide is 3:0.05:1, magnesium hydroxide is added to the deionization, and the power is 200~ After ultrasonic treatment at 500W and ultrasonic frequency of 50-100KHz for 20 minutes, add tris(dioctylpyrophosphoryloxy)isopropyl titanate, continue ultrasonic treatment for 20 minutes, and obtain modified by suction filtration, washing, drying and grinding magnesium hydroxide;

[0045] (2) Preparation of modified graphene

[0046] Add the urea solution dropwise to the graphene oxide dispersion liquid, ultrasonically disperse for 5 hours, and then conduct a hydrothermal reaction at 160°C for 6 hours to obtain an amino-modified graphene hydrogel, break t...

Embodiment 2

[0051] According to the step (1) and step (2) of Example 1, modified magnesium hydroxide and modified graphene were obtained respectively, and the following raw materials in parts by weight were weighed: 100 parts of polypropylene resin, 20 parts of glass fiber , 3 parts of modified graphene, 8 parts of modified magnesium hydroxide, 0.8 part of polypropylene wax, 0.3 part of antioxidant; polypropylene resin, modified graphene, modified magnesium hydroxide, polypropylene wax, antioxidant are added Mix evenly in a high-speed mixer, then transfer to a twin-screw extruder, and at the same time add glass fibers to the twin-screw extruder, melt, mix and disperse at 160-210°C, extrude and granulate, and make a halogen-free resistor by injection molding. Combustible polypropylene composite material, wherein, the extrusion temperature of the twin-screw extruder is: barrel I zone 160°C, barrel II zone 170°C, barrel III zone 185°C, die head I zone 190°C, die head II zone 200°C, 200°C in ...

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Abstract

The invention discloses a halogen-free flame-retardant polypropylene composite material and a preparation method thereof. The halogen-free flame-retardant polypropylene composite material includes, byweight, 100 parts of a polypropylene resin, 10-30 parts of a glass fiber, 1-6 parts of modified graphene, 3-10 parts of modified magnesium hydroxide, 0.5-2 parts of polypropylene wax and 0.1-1 part of an antioxidant. The addition of the modified graphene and modified magnesium hydroxide to the polypropylene composite material system obviously enhances the flame retardant effect of the composite material, the modified graphene and modified magnesium hydroxide have obvious cooperative flame retardant effects, and the modified graphene and modified magnesium hydroxide have good compatibility with the polypropylene resin, and slightly affect the mechanical properties of the polypropylene resin, and the addition of the glass fiber greatly enhances the mechanical properties of the composite material.

Description

technical field [0001] The invention relates to the technical field of polymer functional materials, in particular to a halogen-free flame-retardant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is the fastest-growing general-purpose resin. Polypropylene has the advantages of good mechanical properties, chemical corrosion resistance, low density, low toxicity, and low cost. It is widely used in the fields of automobiles, cables, packaging, building materials, and furniture. . However, the poor thermal stability and flame retardancy of polypropylene greatly limit its application fields. Due to the free structure of PP, it is easy to burn in case of fire, with high calorific value and fast burning speed, accompanied by smoke and dripping, and is prone to fire. In order to solve this defect of polypropylene, many foreign and domestic scholars have A lot of research has been done on flame retardant polypropylene ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/06C08K9/04C08K3/22C08K3/04C08K7/14
CPCC08K2003/2224C08L23/12C08L2201/02C08L2201/22C08L2205/025C08K13/06C08K9/04C08K3/22C08K3/042C08K7/14
Inventor 汪泽维
Owner 安庆市泽烨新材料技术推广服务有限公司
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