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Halogen-free flame retardant, preparation method thereof, and cable tray comprising the halogen-free flame retardant

A cable tray and flame retardant technology, which is applied in the field of halogen-free flame retardants and cable trays, can solve problems such as high smoke density, poor thermal stability, and corrosion

Active Publication Date: 2021-04-20
山东盛瑞科华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid, and it is not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons.
[0003] However, PVC will release hydrogen chloride and other toxic gases such as dioxin during combustion
PVC also has disadvantages such as poor thermal stability and high smoke density when burning.

Method used

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  • Halogen-free flame retardant, preparation method thereof, and cable tray comprising the halogen-free flame retardant
  • Halogen-free flame retardant, preparation method thereof, and cable tray comprising the halogen-free flame retardant
  • Halogen-free flame retardant, preparation method thereof, and cable tray comprising the halogen-free flame retardant

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preparation example Construction

[0030] On the other hand, another embodiment of the present invention provides a preparation method of the above-mentioned halogen-free flame retardant, the preparation method comprising the following steps:

[0031] Exfoliate the vermiculite to obtain vermiculite with fully exfoliated layer structure;

[0032] The graphene is intercalated between the layers of the exfoliated vermiculite to obtain the halogen-free flame retardant.

[0033] The process of exfoliating vermiculite is also the process of increasing the interlayer spacing of vermiculite. Therefore, in this embodiment, the method for exfoliating the vermiculite is not particularly limited, as long as the effect can be achieved. In a preferred example, the method for exfoliating the vermiculite includes: dispersing the vermiculite in deionized water and ultrasonicating to obtain the vermiculite whose layer structure is fully exfoliated. Wherein, the power of the ultrasonic wave is preferably above 1000W, at this ti...

Embodiment 1

[0045] A preparation method of a halogen-free flame retardant, comprising the steps of:

[0046]Disperse 3 g of vermiculite into 300 ml of deionized water, stir for 2 hours, and peel off for 5 hours with an ultrasonic cell pulverizer, wherein the peeling power is 1000 W to obtain a vermiculite dispersion. Disperse 7 g of graphene into 200 ml of deionized water, and ultrasonically stir for 1 h to obtain a graphene dispersion. The graphene dispersion and the vermiculite dispersion were mixed and ultrasonically stirred for 5 hours, and then subjected to vacuum filtration to obtain a halogen-free flame retardant for graphene-intercalated vermiculite. Its XRD spectrum is as figure 1 As shown, it can be seen from the figure that compared with the characteristic peak of vermiculite, the characteristic peak of the vermiculite halogen-free flame retardant intercalated with graphene shifts to the left, from 7.2° to 2.79°, and can be calculated according to the Bragg equation , Vermicu...

Embodiment 2

[0048] A preparation method of a halogen-free flame retardant, comprising the steps of:

[0049] Disperse 3 g of vermiculite into 300 ml of deionized water, stir for 2 hours, and peel off for 5 hours with an ultrasonic cell pulverizer, wherein the peeling power is 1200 W to obtain a vermiculite dispersion. Disperse 0.75 g of graphene into 200 ml of deionized water, and ultrasonically stir for 1 h to obtain a graphene dispersion. The graphene dispersion and the vermiculite dispersion were mixed and ultrasonically stirred for 5 hours, and then subjected to vacuum filtration to obtain a graphene-intercalated vermiculite halogen-free flame retardant.

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Abstract

The invention discloses a halogen-free flame retardant. The halogen-free flame retardant includes vermiculite and graphene, wherein the graphene is intercalated between layers of the vermiculite. When the halogen-free flame retardant is applied to a cable tray containing PVC, the cable tray has good smoke suppression properties, good flame retardancy, antistatic properties, and good mechanical properties. The invention also discloses the preparation method and application of the halogen-free flame retardant.

Description

technical field [0001] The invention relates to the technical field of novel composite materials. More specifically, it relates to a halogen-free flame retardant, a preparation method thereof and a cable tray containing the halogen-free flame retardant. Background technique [0002] Polyvinyl chloride, referred to as PVC (Polyvinyl chloride) in English, is a polymer formed by the polymerization of vinyl chloride monomers in peroxides, azo compounds and other initiators; or under the action of light and heat according to the mechanism of free radical polymerization. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC used to be the most widely used general-purpose plastic in the world. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08L23/28C08K9/02C08K3/34C08K3/04C08K3/26
Inventor 周伟孙军
Owner 山东盛瑞科华新材料有限公司
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