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

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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 v

Method used

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

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0029] Example 1

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

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

[0032]

[0033]

[0034] Among them, the monomer 3,9-dichloro-2,4,8,10-tetrachloro-3,9-diphosphorus spiro-3,9 dioxo[5.5]-undecane (abbreviated as double spiro, SPDPC) For the synthesis, refer to the method disclosed in US Patent No. 3 169 863 for preparation.

[0035]Into a 50ml polymerization flask equipped with nitrogen inlet and outlet and mechanical stirrer, add 12.5g of bisphenol S (SDP) and 14.8g of double spiro ring; under the protection of nitrogen flow, slowly increase the temperature to 170°C, at which time there will be hydrogen chloride Gas is generated, and the system is in a solid phase reaction; when it is kept at 170℃ for 2h, the system slowly softens, and the system is liquid after about 20min. Continue to maintain the temperature to react until the phenomenon of pole climbing o...

Example Embodiment

[0036] Example 2

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

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

[0039]

[0040]

[0041] Among them, the monomer 3,9-dichloro-2,4,8,10-tetrachloro-3,9-diphosphorus spiro-3,9 dioxo[5.5]-undecane (abbreviated as double spiro, SPDPC) For the synthesis, refer to the method disclosed in US Patent No. 3 169 863 for preparation.

[0042] In a 50ml polymerization flask equipped with nitrogen inlet and outlet and a mechanical stirrer, add 25g of bisphenol A and 29.6g of double spiro ring; under the protection of nitrogen flow, slowly increase the temperature to 180°C, at this time hydrogen chloride gas begins to be generated, and The system is in a solid phase reaction; when it is kept at 180°C for 2 hours, the system slowly softens, and the system is in a liquid state after about 20 minutes. Continue to maintain the temperature to react until rod climbing occurs, an...

Example Embodiment

[0043] Example 3

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

[0045] The reaction equation is as follows:

[0046]

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

[0048] In a 500ml four-necked flask equipped with a mechanical stirrer, thermometer, spherical reflux condenser and constant pressure dropping funnel, add 100ml of acetonitrile, 18g of 2-methoxy-4,6-dichloro-s-triazine, Cool to 5°C; stir well while adding 10.3g of diethylenetriamine acetonitrile solution dropwise; after the dropwise addition, heat up to 60°C and react for 1h; then heat up to the system reflux, and dropwise add sodium carbonate-containing aqueous solution, keep The pH value of the system is neutral, react for 4h; then continue to add boiling water, keep th...

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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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