Bio-based phosphorus-magnesium flame retardant, preparation method and flame-retardant cable composite material

A technology for flame retardant cables and flame retardants, applied in the field of cable insulation, can solve problems such as the generation of toxic fumes, and achieve the effects of protecting the earth's environment, excellent mechanical properties, and excellent low fumes.

Inactive Publication Date: 2021-07-16
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Halogen flame retardants such as chlorine and bromine can effectively improve the flame retardancy of EVA-based cable materials, but they will produce toxic fumes

Method used

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  • Bio-based phosphorus-magnesium flame retardant, preparation method and flame-retardant cable composite material
  • Bio-based phosphorus-magnesium flame retardant, preparation method and flame-retardant cable composite material
  • Bio-based phosphorus-magnesium flame retardant, preparation method and flame-retardant cable composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This embodiment relates to a preparation method of a bio-based magnesium phosphorus flame retardant, such as figure 1 As shown, it specifically includes the following steps:

[0044]5.00 g of MH was added to 100 ml of water and stirred for 5 min to form a homogeneous suspension. Then, slowly drop 13.3ml of PA solution (70wt%) into the suspension, continue stirring for 5min, then wash the resulting bulk product MHPA1, then dry at 60°C for 48h, and finally sieve the product (200 mesh) to obtain a homogeneous Granular powder MHPA1.

[0045] Add 8.00g of MHPA1 into 100ml of water and stir for 5min. Then 6ml of PA (30wt%) was diluted in water (100ml). Thereafter, the diluted PA aqueous solution was slowly dropped into the homogeneous suspension of MHPA1 by continuous stirring. After continuous stirring for 10 minutes, MHPA2 was obtained. After washing in warm water at 50°C, it was dried in an oven at 60°C for 48 hours. Finally, the product was sieved (200) to obtain unif...

Embodiment 2

[0048] This embodiment relates to a preparation method of a bio-based phosphorus magnesium flame retardant, specifically comprising the following steps:

[0049] 10.00 g of MH was added to 150 ml of water and stirred for 10 min to form a homogeneous suspension. Then, slowly drop 14ml of PA solution (80wt%) into the suspension, continue to stir for 10min, then wash the resulting bulk product MHPA1, then dry at 80°C for 50h, and finally sieve the product (250 mesh) to obtain a uniform Granular powder MHPA1.

[0050] Add 10.00g of MHPA1 into 150ml of water and stir for 10min. Then 10ml PA was diluted in water (150ml). Thereafter, the diluted PA aqueous solution was slowly dropped into the homogeneous suspension of MHPA1 by continuous stirring. After continuous stirring for 15 minutes, MHPA2 was obtained. After washing in warm water at 60°C, it was dried in an oven at 80°C for 50 hours, and finally the product was sieved (250) to obtain uniform particle powder MHPA2.

[0051] ...

Embodiment 3

[0053] This embodiment relates to a preparation method of an EVA-based flame-retardant cable composite material, which specifically includes the following steps:

[0054] The MHPA2 and MH in Example 1 were blended into EVA at a ratio of 4:1 by means of melt blending to prepare an EVA-based flame-retardant cable composite material.

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Abstract

The invention relates to the technical field of cable insulation, and particularly discloses a bio-based phosphorus-magnesium flame retardant, a preparation method and a flame-retardant cable composite material. The preparation method comprises the steps of preparing a magnesium hydroxide suspension; dropwise adding a first phytic acid solution into the magnesium hydroxide suspension to obtain a first mixed solution, and sequentially stirring, washing and drying the first mixed solution to obtain a powdery precursor; preparing a precursor suspension, dropwise adding a second phytic acid solution into the precursor suspension to obtain a second mixed solution, and sequentially stirring, washing and drying the second mixed solution to obtain the powdery bio-based phosphorus-magnesium flame retardant. The flame-retardant cable composite material disclosed by the invention has excellent flame retardance, smoke suppression property and mechanical property.

Description

technical field [0001] The invention relates to the technical field of cable insulation, and specifically discloses a bio-based phosphorus-magnesium flame retardant, a preparation method and a flame-retardant cable composite material. Background technique [0002] Ethylene-vinyl acetate copolymer (EVA) has been widely used in hot melt adhesives, cable insulation pipes, automobiles and coatings due to its good flexibility, shock resistance, slip resistance and strong pressure resistance. However, flammability has greatly restricted the application of EVA in most industrial fields, especially the wire and cable industry. Therefore, people have conducted a lot of research on the flame retardant and smoke suppression properties of EVA-based cable materials, such as adding effective flame retardants. Halogen flame retardants such as chlorine and bromine can effectively improve the flame retardancy of EVA-based cable materials, but they will produce toxic fumes. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C08K3/22C08K5/521C08L23/08
CPCC08K3/22C08K5/0091C08K5/521C08K2003/2224C08L2201/02C08L23/0853
Inventor 申利国林红军徐思奕李建喜周成
Owner ZHEJIANG NORMAL UNIVERSITY
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