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Halogon-free expansion flame-retarded polyolefin complex substance

An intumescent flame retardant and compound technology, which is applied in the field of flame retardant polyolefin blends, can solve the problems of adverse effects of flame retardant expansion process, physical mechanical and processing properties cannot be changed too much, and achieve Effects of high oxygen index, excellent moldability, and low smoke emission

Active Publication Date: 2005-12-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in order for the intumescent flame retardant to be able to match with the polymer to form a compound with good flame retardant effect, the following requirements must be met at the same time: (1) The thermal stability of the intumescent flame retardant must be good, and it must be able to withstand the polymer High temperature above 200°C during processing; (2) A large amount of volatile substances and residues are released during the pyrolysis process of the polymer, which cannot adversely affect the expansion process of the flame retardant; (3) When the polymer burns, the intumescent flame retardant (4) The flame retardant must have good compatibility with the polymer, and the physical, mechanical and processing properties of the polymer itself cannot be greatly changed.

Method used

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  • Halogon-free expansion flame-retarded polyolefin complex substance
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  • Halogon-free expansion flame-retarded polyolefin complex substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example is a preparation example of the halogen-free char-forming flame retardant SPS.

[0031] The reaction equation of the present embodiment is as follows:

[0032]

[0033]

[0034] Among them, the monomer 3,9-dichloro 2,4,8,10-tetrachloro-3,9-diphosphorous spiro-3,9 dioxo[5.5]-undecane (referred to as double spiro, SPDPC) The synthesis of is prepared by referring to the method disclosed in US Pat. No. 3,169,863.

[0035]In a 50ml polymerization bottle equipped with a nitrogen inlet and outlet and a mechanical stirrer, add 12.5g of bisphenol S (SDP) and 14.8g of double spiro rings; Gas is generated, and the system is in a solid state reaction; when kept at 170°C for 2 hours, the system softens slowly, and after about 20 minutes the system becomes liquid, continue to maintain the temperature until the rod climbing phenomenon occurs, and then raise the temperature to 220°C to continue After reacting for 3 hours, 22.5 g of light yellow solid product was ob...

Embodiment 2

[0037] This example is a preparation example of the halogen-free char-forming flame retardant SPA.

[0038] The reaction equation of the present embodiment is as follows:

[0039]

[0040]

[0041] Among them, the monomer 3,9-dichloro 2,4,8,10-tetrachloro-3,9-diphosphorous spiro-3,9 dioxo[5.5]-undecane (referred to as double spiro, SPDPC) The synthesis of is prepared by referring to the method disclosed in US Pat. No. 3,169,863.

[0042] In the 50ml polymerization bottle equipped with nitrogen inlet and outlet and mechanical stirrer, add 25g bisphenol A and 29.6g double spiro; The system is in a solid phase reaction; when kept at 180°C for 2 hours, the system softens slowly, and after about 20 minutes the system is in a liquid state. Continue to maintain the temperature until the rod climbing phenomenon occurs, and then raise the temperature to 210°C and continue to react for 2 hours. 44 g of light yellow solid product was obtained. The hydrogen chloride gas discharge...

Embodiment 3

[0044] This example is a preparation example of the halogen-free nitrogen-containing flame retardant PTEN (triazine ring flame retardant).

[0045] This reaction equation is as follows:

[0046]

[0047] The synthesis method of the monomer 2-methoxy-4,-dichloro-1,3,5-s-triazine is prepared by referring to the method reported in the literature (Thurston J.T., J AmChem Soc. 1951, 73, 2989-3105).

[0048] In a 500ml four-necked bottle equipped with a mechanical stirrer, a thermometer, a spherical reflux condenser and a constant pressure dropping funnel, add 100ml of acetonitrile, 18g of 2-methoxy-4,6-dichloro-s-triazine, Cool to 5°C; fully stir, and dropwise add 10.3g of diethylenetriamine in acetonitrile solution; after the dropwise addition, raise the temperature to 60°C, and react for 1h; then raise the temperature to reflux of the system, and add dropwise an aqueous solution containing sodium carbonate, keep The pH value of the system was neutral, and reacted for 4 hours;...

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Abstract

The invention discloses a kind of non-halogen inflating fire-retarding polyolefine composition, which includes 50 - 90 weight shares of thermosplasticity polyolefine basic material and 10 - 50 weight shares of non-halogen inflating fire retarder. The non-halogen inflating fire retarder is comprised of non-halogen charcoal becoming fire retarder, non-halogen nitrous fire retarder and APP, weight proportions of which are 1 - 6 : 0.5 - 2 : 0.5 - 2. The compound has high oxygen index, melting drops resistance, low heat emitting velocity, no halogen, low toxicity, low smoke emission and small effect to dynam performance of basic material. It can be used in various fire retarding fields, and is especially suitable to be used in electrical wire cable, communications cable, shipping and auto industries.

Description

1. Technical field [0001] The invention belongs to the technical field of flame-retardant polyolefin blends, and in particular relates to a halogen-free intumescent flame-retardant polyolefin compound. The composite has good flame retardancy and good toughness, and the elongation at break is greater than 200%, and is especially suitable for use in fields with strict requirements on flame retardancy, such as wire and cable, electronic and electrical, home decoration and automobile industries. 2. Background technology [0002] Currently widely used polyvinyl chloride wires and cables and threading pipes will produce a large amount of toxic and corrosive hydrogen halide gas and smoke during thermal decomposition or combustion, which not only hinders fire fighting and personnel evacuation, but also corrodes instruments and equipment. In my country, the fire losses caused by cables alone amount to 5 billion yuan per year. [0003] As the most widely used general-purpose plastic,...

Claims

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Application Information

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IPC IPC(8): C08L51/06
Inventor 王玉忠胡小平
Owner SICHUAN UNIV
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