A kind of reinforced 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 reinforced flame-retardant polypropylene composite materials and its preparation, can solve problems such as increased costs, reduced flame-retardant efficiency of halogen-based flame retardants, and unsatisfactory effects, so as to ensure mechanical Performance, improved flame retardancy, improved compatibility

Active Publication Date: 2020-04-21
FOSHAN KAIYUE GRAND SKY PLASTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat absorption of magnesium salt whiskers is less than the combustion heat of polymer materials. In order to achieve the ideal flame retardant effect, a larger filling amount is necessary.
When magnesium salt whisker is used alone, its addition needs to be above 60% to have a good flame retardant effect, which often affects the processing performance and mechanical properties of the material to varying degrees
In addition, it will greatly increase the cost
[0004] In order to solve the above problems, in the prior art, inorganic flame retardant components (such as talcum powder, magnesium hydroxide, magnesium salt whiskers, etc.) are added to polypropylene with high-efficiency halogenated flame retardants, but the effect is not Ideally, the compounding of halogenated flame retardants and inorganic flame retardant components not only fails to achieve synergistic effect, but reduces the flame retardant efficiency of halogenated flame retardants

Method used

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  • A kind of reinforced flame-retardant polypropylene composite material and preparation method thereof
  • A kind of reinforced flame-retardant polypropylene composite material and preparation method thereof
  • A kind of reinforced flame-retardant polypropylene composite material and preparation method thereof

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preparation example Construction

[0035] The present invention also provides a preparation method of the reinforced flame-retardant polypropylene composite material, comprising the following steps:

[0036] 1) Extrude and granulate after mixing polypropylene, halogenated flame retardant, antioxidant and initiator to obtain pellets;

[0037] 2) Extruding and granulating the pellets obtained above with magnesium salt whiskers to obtain a reinforced flame-retardant polypropylene composite material.

[0038] The invention mixes polypropylene, halogen flame retardant, antioxidant and initiator, extrudes and granulates to obtain pellets. In the present invention, the mixing temperature is preferably 25-50°C, more preferably 30-45°C, most preferably 38-42°C; in the present invention, the mixing time is preferably 10-15 minutes, More preferably, it is 11 to 14 minutes, and most preferably, it is 12 to 13 minutes. In the present invention, the mixing process is preferably carried out under stirring conditions. In the...

Embodiment 1

[0051] Premix 100 parts of polypropylene, 3 parts of pentachlorophenyl acrylate, 0.1 part of antioxidant 1010, and 0.2 part of dicumyl peroxide for 15 minutes. Reactive extrusion granulation is carried out in a warm 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. The screw speed is 180r / min, and the cutting speed is 400r / min.

[0052] After drying the prepared granules, mix them with 20 parts of magnesium salt whiskers, then carry out mixing, plasticizing and granulating through a twin-screw extruder. The extrusion granulation process is the same as before, and the reinforced flame-retardant Polypropylene composite.

Embodiment 2

[0054] Premix 100 parts of polypropylene, 4 parts of pentachlorophenyl acrylate, 0.1 part of antioxidant B215, and 0.3 part of initiator dicumyl hydroperoxide. After the above premixed material has an aspect ratio of 32, divide it into six 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, 210°C, and the head temperature is 210°C. The screw speed is 250r / min, and the cutting speed is 450r / min.

[0055] After drying the prepared granules, mix them with 18 parts of magnesium salt whiskers, and then carry out mixing, plasticizing and granulating through a twin-screw extruder. The extrusion granulation process is the same as before, and the reinforced flame-retardant Polypropylene composite.

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Abstract

The invention provides a reinforced flame-retardant polypropylene composite. The composite is prepared from raw materials in parts by weight as follows: 100 parts of polypropylene, 3-5 parts of a halogen flame retardant, 0.01-0.5 parts of an antioxidant, 0.2-0.4 parts of an initiator and 15-20 parts of magnesium salt whiskers. The reinforced flame-retardant polypropylene composite has the tensilestrength larger than or equal to 32.4 MPa, the impact strength larger than or equal to 4.1 kJ.m<-2> and the flame-retardant performance of class V0 and has good mechanical performance and flame-retardant performance. Meanwhile, a preparation method of the reinforced flame-retardant polypropylene composite is simple, easy to control and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polymer materials, in particular to a reinforced flame-retardant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is one of the five general-purpose plastics. It does not absorb water, has high heat resistance, and has good processability. It has a wide range of applications. However, polypropylene is a combustible material, its oxygen index is between 16 and 19, and its tensile strength is low, which limits its application range. In the prior art, halogen-based flame retardants are usually used to improve the flame-retardant properties of polypropylene. Although halogen-based flame retardants can make the flame-retardant properties of polypropylene materials meet the requirements, they will produce a large amount of toxic smoke when burned. [0003] Magnesium salt whisker is a high-performance inorganic flame-retardant reinfor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08K7/08C08F255/02C08F220/22
CPCC08F255/02C08K7/08C08L2201/02C08L51/06C08F220/22
Inventor 陈腾渊宋波黄雄关陈洁钦潘志军
Owner FOSHAN KAIYUE GRAND SKY PLASTIC TECH CO LTD
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