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

A composite material and polyolefin technology, which is applied in the field of halogen-free flame retardant polyolefin composite material and its preparation, can solve the problems of reducing the peak value of heat release rate, the improvement range is not obvious, the effect is not good, and the notched impact strength is improved. Improve mechanical properties and prevent endothermic combustion

Active Publication Date: 2020-07-31
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-flame retardant has a small amount of addition (≤ 5wt%), can significantly reduce the peak heat release rate (PHRR) and smoke density (SEA) of the material when it is burned, and at the same time improve the mechanical properties and thermal stability of the material to varying degrees. Advantages, but its disadvantage is that the effect is not good in the traditional flame retardant test (such as: the oxygen index does not increase significantly, and basically has no effect in the UL-94 test)

Method used

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

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preparation example Construction

[0036] The preparation method of the above-mentioned halogen-free flame-retardant polyolefin composite material comprises the following steps: taking raw materials according to the composition and ratio, stirring and mixing uniformly to obtain a polyolefin mixture, and then melting and blending through an extruder or an internal mixer, and finally heating Press molding or injection molding to obtain halogen-free flame-retardant polyolefin composite materials. The molding temperature is above the melting temperature of polyolefin and below the decomposition temperature. The preferred molding temperature is 190-220°C, which can be selected according to actual needs.

[0037] In the present invention, the materials mentioned are all commercially available.

Embodiment 1

[0046] Add polypropylene, nano-carbon black, nickel trioxide, calcium silicate, sodium monohydrogen phosphate and antioxidant 1010 into the mixer according to the mass ratio of 81:3:5:3:7:1 and mix evenly to obtain a polyolefin mixture , and then melted and blended in an internal mixer, and hot-pressed to obtain a halogen-free flame-retardant polyolefin composite material.

Embodiment 2

[0048] Add polypropylene, nano-carbon black, nickel trioxide, calcium silicate, sodium monohydrogen phosphate and antioxidant 1010 into the mixer according to the mass ratio of 82:3:5:1:8:1 and mix evenly to obtain a polyolefin mixture , and then melted and blended in an internal mixer, and hot-pressed to obtain a halogen-free flame-retardant polyolefin composite material.

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Abstract

The invention discloses a halogen-free flame-retardant polyolefin composite material and a preparation method thereof and belongs to the technical field of polymer composite material design and processing. The halogen-free flame-retardant polyolefin composite material comprises, by weight, 79-83 parts of polyolefin, 8-10 parts of combined catalyst, 5-10 parts of synergist and 0.5-1 part of antioxidant, wherein the combined catalyst is the mixture of a nano carbon material and transition metal, and the mass ratio of the nano carbon material to the transition metal is (0.6-1.7):1; the synergistis an inorganic adhesive compound. The composite material is high in flame retarding efficiency and oxygen index, excellent in flame retardance, thermal stability, mechanical performance and processability, environmentally friendly, low in smoke and toxicity during combustion, free of corrosive-gas release and capable of satisfying environment protection requirements.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant polyolefin composite material and a preparation method thereof, belonging to the technical field of polymer composite material design and processing. Background technique [0002] With excellent comprehensive performance and low price, polyolefin has been widely used in construction, transportation, electrical appliances, daily household and other fields. However, while bringing great convenience to people's life, its potential flammability brings The fire problem seriously threatens human property and life safety. At the same time, with the improvement of people's awareness of safety and environmental protection and the establishment of relevant national directives and regulations, halogen-containing flame retardants are gradually being replaced. It is important to develop a highly efficient, low-smoke and low-toxic halogen-free environmentally friendly flame retardant system without sacrificing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08L23/06C08L23/16C08K13/02C08K3/04C08K3/22C08K3/34C08K3/32C08K5/134C08K3/24C08K13/04C08K7/24C08K7/06C08K5/526C08K7/00
CPCC08K3/04C08K3/22C08K3/24C08K3/26C08K3/32C08K3/34C08K5/1345C08K5/526C08K7/00C08K7/06C08K7/24C08K13/02C08K13/04C08K2003/2265C08K2003/2275C08K2003/2289C08K2003/2293C08K2003/265C08K2003/324C08K2003/325C08K2201/011C08L23/12C08L2201/02C08L2201/08C08L2201/22C08L2205/03C08L51/06C08L23/06C08L23/16
Inventor 唐涛闻新陈学成王东升
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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