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

A technology of flame-retardant polypropylene and composite materials, which is applied in the field of halogen-free flame-retardant polypropylene composite materials and its preparation, can solve problems such as poor dispersion, low molecular weight, and effect effects, and achieve the effect of reducing the amount of use

Active Publication Date: 2014-12-10
广东道生科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor compatibility with polypropylene, the dispersion is uneven, and the molecular weight is low and it is easy to migrate, which affects its effect.
[0009] Magnesium hydroxide is a very polar inorganic compound. Its crystal has microscopic internal strain in the (101) direction. The crystal surface has a positive charge and is hydrophilic. At the same time, the interface between magnesium hydroxide and the polymer produces voids, resulting in poor dispersion and poor compatibility with other materials, so the cross-section of the mixture often appears dispersed when the filling amount is high. The phenomenon of "cooking" caused by poor degree and poor affinity

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] Premix 50 parts of polypropylene, 3 parts of methacrylate-based alkoxy phosphate, 10100.1 parts of antioxidant, and 0.2 parts of dicumyl peroxide, and divide the above premix into six parts with an aspect ratio of 32. Reactive extrusion granulation is carried out in a twin-screw extruder with zone temperature control. The processing temperatures in zones 1 to 6 are: 170°C, 190°C, 195°C, 200°C, 210°C, 205°C, and the head temperature is 210°C.

[0027] Dry the prepared pellets and mix them with 30 parts of brucite powder, then mix, plasticize and pelletize through a twin-screw extruder, and the extrusion mixing process is the same as before to prepare the halogen-free flame-retardant Polypropylene composite.

example 2

[0029] Premix 50 parts of polypropylene, 4 parts of methacrylate-based alkoxy phosphate, 10100.1 parts of antioxidant, and 0.3 parts of dicumyl peroxide. Reactive extrusion granulation is carried out in a six-zone temperature-controlled twin-screw extruder. The processing temperatures in the first to sixth zones are: 170°C, 190°C, 195°C, 200°C, 210°C, 205°C, and the head temperature is 210°C .

[0030] Dry the prepared granules and mix them with 25 parts of brucite powder, then mix, plasticize and granulate through a twin-screw extruder, and the extrusion mixing is the same as before to prepare the halogen-free flame-retardant polymer Acrylic composite.

example 3

[0032] Premix 50 parts of polypropylene, 5 parts of methacrylate-based alkoxy phosphate, 0.1 part of antioxidant 10100.1 part of dicumyl peroxide, and 0.4 part of dicumyl peroxide. After premixing the above raw materials, the aspect ratio is 32. Reactive extrusion granulation is carried out in a twin-screw extruder with zone temperature control. The processing temperatures in zones 1 to 6 are: 170°C, 190°C, 195°C, 200°C, 210°C, 205°C, and the head temperature is 210°C. Dry the prepared pellets and mix them with 20 parts of brucite powder, then mix, plasticize and pelletize through a twin-screw extruder, and the extrusion mixing process is the same as before to prepare the halogen-free flame-retardant Polypropylene composite.

[0033] The performance test data of examples 1-3 are shown in the following table in sequence:

[0034] instance number

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Abstract

The invention relates to a halogen-free flame-retardant polypropylene composite material and a preparation method thereof. The method comprises the following steps: premixing polypropylene, methacrylate alkoxy phosphate, antioxidant 1010 and dicumyl peroxide, and carrying out reactive grafting and granulation with an extruder; and drying the granules, mixing with brucite powder, and carrying out mixing, plastification and granulation with the extruder, thereby obtaining the halogen-free flame-retardant polypropylene composite material.

Description

technical field [0001] The invention relates to a flame-retardant polymer material and a preparation method thereof. More specifically, the present invention relates to a halogen-free flame-retardant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is a general-purpose plastic with high heat resistance and good insulation properties, allowing it to be used in a wide range of fields. But polypropylene has an oxygen index between 16-19 and is a combustible material. Although the usual brominated flame retardants can meet the requirements of flame retardancy, they produce a large amount of toxic smoke when burned. [0003] Due to major fires, secondary pollution caused by burning plastics, the emergence of dioxins, and increasingly stringent environmental protection, the plastics industry is forced to use non-toxic, pollution-free, and smoke-suppressing inorganic flame retardants, which account for a relatively lar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08F255/02C08F230/02C08K3/22
CPCC08F255/02C08L23/12C08L2201/02C08L2201/22C08L51/06C08K2003/2224C08F230/02
Inventor 李本立郑少辉
Owner 广东道生科技股份有限公司
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