Low temperature-resistant flexible crosslinkable halogen-free flame retardant cable material and preparation method thereof

A flame-retardant cable material, low-temperature flexible technology, used in plastic/resin/wax insulators, organic insulators, etc., can solve the problems of a large number of toxic and harmful gases, loss of flame-retardant performance, suffocation and casualties, and avoid the deterioration of flame-retardant performance. , The effect of improving electrical insulation properties and improving dispersion ability

Active Publication Date: 2013-12-25
应急管理部四川消防研究所
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

On January 5, 2010, a cable caught fire 240 meters underground in Lisheng Coal Mine, Tanjiashan Town, Xiangtan County, Xiangtan City, Hunan Province during the production process, killing 34 miners and causing a direct economic loss of 29.62 million yuan; The Major Accident Investigation and Handling Report Approval” pointed out that the direct cause of the fire accident was that the non-flame-retardant cables laid in the three dark shafts in the middle shaft of Lisheng Coal Mine were aged and damaged, and the short-circuit caught fire, which ignited the plastic tube of the cable jacket and produced a large amount of toxic and harmful substances. gas, causing suffocation
However, the above-mentioned intumescent flame retardants have many application defects in polyolefin cable insulation and sheath materials, mainly as (1) the above-mentioned flame retardant components cannot Compounds that melt or begin to thermally decompose or sublimate near the melting point of the flame retardant component itself, making it difficult to uniformly disperse the flame retardant in the resin substrate. (2) Pentaerythritol has poor thermal stability, and the initial thermal decomposition temperature is 211 °C, it is easy to decompose at the processing temperature of the polymer. (3) Pentaerythritol has strong water solubility, and the solubility at room temperature is 6.8g / 100ml, which leads to poor thermal stability and poor water resistance in all IFRs that use pentaerythritol as a char-forming agent. The problem that the flame retardant properties of the flame retardant material will gradually lose due to the precipitation and water solubility of the flame retardant during use
In view of the above problems, relevant researchers have carried out a lot of research, but so far, there has been no report on the use of halogen-free intumescent flame retardants with good thermal stability and char-forming agent components with melting characteristics for flame-retardant cable materials.

Method used

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  • Low temperature-resistant flexible crosslinkable halogen-free flame retardant cable material and preparation method thereof
  • Low temperature-resistant flexible crosslinkable halogen-free flame retardant cable material and preparation method thereof
  • Low temperature-resistant flexible crosslinkable halogen-free flame retardant cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 150.4 g of 9,10-dihydro-9-oxa-10-phosphorananthrene-succinic acid, 800 g of tris(2-hydroxyethyl) isocyanurate, 288.7 g of terephthalic acid and 4.5 g of g tetrabutyl titanate was added to the reaction kettle, filled with nitrogen to remove the air in the kettle, and pressurized to 0.07MPa; under mechanical stirring, the temperature was raised to 200-240℃ within 2h to carry out esterification reaction, and the pressure in the kettle was controlled to be ≤0.1MPa , when the water generated by the esterification reaches 70ml, the esterification reaction is completed; the vacuum dehydration reaction is performed at 230-245°C for at least 0.5h, the material is discharged, pulverized and ground to pass through a 100-mesh sieve. The obtained product is a co-esterification product of char-forming agent DDP, terephthalic acid and THEIC (CFA-TTD1.41), the melting point is 110-116 °C, the initial thermal decomposition temperature is 265 °C, and the solubility in water at room temper...

Embodiment 2

[0043] 793.8 g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-succinic acid, 1000 g of tris(2-hydroxyethyl) isocyanurate and 5 g of tetrabutyl titanate were added to the In the reaction kettle, fill with nitrogen to remove the air in the kettle, and pressurize it to 0.07MPa; under mechanical stirring, the temperature is raised to 200-240℃ within 2h to carry out the esterification reaction, and the pressure in the kettle is controlled to be ≤0.1MPa, when the water generated by the esterification is collected When it reaches 75ml, the esterification reaction is finished; the vacuum dehydration reaction is carried out at 230-245°C for at least 0.5h, the material is discharged, pulverized and ground to pass through a 100-mesh sieve. The obtained product is a co-esterified product of char-forming agent DDP and THEIC (CFA-TD1.67), with a melting point of 105-109 °C, an initial thermal decomposition temperature of 267 °C, and a solubility in water of 0.5g / 100ml at room temperature.

[...

Embodiment 3

[0048]497g of 9,10-dihydro-9-oxa-10-phosphophenanthrene-succinic acid, 1000g of tris(2-hydroxyethyl)isocyanurate, 238g of terephthalic acid and 4.5g of titanium Add tetrabutyl ester to the reaction kettle, fill the kettle with nitrogen to remove the air in the kettle, and pressurize to 0.07MPa; under mechanical stirring, the temperature is raised to 200-240°C within 2 hours to carry out the esterification reaction, and the pressure in the kettle is controlled to be ≤0.1MPa. When the water generated by the esterification reaches 95ml, the esterification reaction is over; vacuum dehydration reaction at 230-245°C for at least 0.5h, discharge, pulverize and finely pass through a 100-mesh sieve. The resulting product is the co-esterification product (CFA-TTD1.33) of char-forming agent DDP, terephthalic acid and THEIC, with a melting point of 109-113°C, an initial thermal decomposition temperature of 266°C, and a solubility in water at room temperature of 0.2 g / 100ml.

[0049] Mix ...

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Abstract

The invention discloses a low temperature-resistant flexible crosslinkable halogen-free flame retardant cable material. The low temperature-resistant flexible crosslinkable halogen-free flame retardant cable material is obtained through mixing 60-80 parts of an ethylene-vinyl acetate copolymer, 10-40 parts of polyethylene, 0-30 parts of ternary ethylene propylene rubber, 2-10 parts of a resin compatilizer, 35-65 parts of a halogen-free expanded flame retardant and 0.5-2 parts of a crosslinking agent, wherein at least one charring agent component in the halogen-free expanded flame retardant has a melting point of 155DEG C or less and an initial pyrolysis temperature of 245DEG C or less. The invention also discloses a preparation method of the cable material. The processing temperature of the introduced low-melting-point high-initial-pyrolysis-temperature charring agent component has a wide window and is matched with the processing temperature of a cable material matrix resin, so the charring agent component can be fused and well dispersed in the processing process, thereby the flame retardation efficiency is improved, the influences on the mechanical performances of the matrix resin are reduced, and the cable material has an excellent flame retardation performance and excellent mechanical performances. The preparation method has the advantages of simplicity, convenient operation, easy control and easy industrial production.

Description

technical field [0001] The invention belongs to the technical field of halogen-free flame-retardant cable material and its preparation. Specifically, the invention relates to a low-temperature-resistant flexible cross-linkable halogen-free flame-retardant cable material and a preparation method thereof. Background technique [0002] Relevant statistics in recent years show that among all kinds of fire accidents in the country, not only the fires caused by electricity account for the largest proportion, but also the fire accidents caused by electricity are the most. For example, from 2000 to 2008, major fires caused by electricity accounted for 33% of the total number of statistical fires; due to electrical reasons such as short circuit of wires, aging of wires and cables, load overload and failure of electrical equipment, etc., cables ignited and flames spread, etc. The fires caused account for more than 30% of the total number of fires, and there is a trend of increasing ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/16C08L51/06C08L51/00C08L83/00C08K13/06C08K9/04C08K3/32C08K3/34C08K5/49C08K7/00C08K3/04H01B3/44
Inventor 葛欣国李风兰彬张翔卢国建彭波冯军尹朝露唐勇张帆刘微张秉浩
Owner 应急管理部四川消防研究所
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