Halogen-free flame-retardant TPU elastomer composition used for electric wires and cables, and preparation method thereof

A wire and cable and elastomer technology, applied in the field of halogen-free flame retardant TPU elastomer composition for wire and cable and its preparation field, can solve the problems of poor flame retardancy, easy migration and precipitation, easy moisture absorption and the like

Active Publication Date: 2018-04-10
江苏利思德新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most widely used are ammonium polyphosphate (APP) with high polymerization degree and organic phosphates, ammonium polyphosphate (APP) flame retardant system with high polymerization degree, which belongs to an intumescent flame retardant system, because of its flame retardant Compared with the inorganic hydroxide system, the addition amount of APP is much lower than that of the inorganic hydroxide system. However, APP is still incompatible with the matrix material due to its hydrophilic surface and certain water solubility. Therefore, the flame-retardant TPU of the APP system is elastic The mechanical strength of bulk materials is still low, and at the same time, it is easy to migrate and precipitate, and the whitening phenomenon of precipitation occurs on the surface of the cable, which not only affects the appearance, but also causes the flame retardancy of the cable to gradually decrease with the precipitation

Method used

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  • Halogen-free flame-retardant TPU elastomer composition used for electric wires and cables, and preparation method thereof
  • Halogen-free flame-retardant TPU elastomer composition used for electric wires and cables, and preparation method thereof
  • Halogen-free flame-retardant TPU elastomer composition used for electric wires and cables, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Mixing of halogen-free flame retardant TPU system

[0049] Dry the TPU in advance, add TPU, compound flame retardant system and other additives that have been weighed in advance according to the proportion (if there is no special statement, the proportion in the present invention is weight percentage), start high-speed stirring, Stir for 10 minutes to complete the compounding of the halogen-free flame-retardant TPU system and discharge.

[0050] (2) Extrusion granulation of materials

[0051] Set the temperature of each zone of the twin-screw extruder at the predetermined temperature (the maximum temperature of the plasticizing section of the screw is 210°C). After the temperature stabilizes for 20 minutes, add a uniformly mixed halogen-free flame-retardant TPU system from the hopper, and start the host and feeder , to complete the extrusion granulation of the material. The granulated material is sent into the silo through the air conveying system and dried.

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Embodiment 2

[0066] The implementation process is the same as in Example 1, except that the ratio of aluminum diethyl hypophosphite and carbon-forming components is adjusted, the ratio of diethyl hypophosphite is increased, and the total amount of the flame retardant system remains unchanged. Other materials and proportioning are shown in Table 1, and the obtained material results are shown in Table 1.

Embodiment 3

[0068] The implementation process is the same as in Example 1, except that the ratio of aluminum diethyl hypophosphite and carbon-forming components is adjusted, the ratio of carbon-forming components is increased, and the total amount of the flame-retardant system is kept unchanged. Other materials and proportioning are shown in Table 1, and the obtained material results are shown in Table 1.

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Abstract

The invention discloses a halogen-free flame-retardant TPU elastomer composition used for electric wires and cables. The halogen-free flame-retardant TPU elastomer composition used for electric wiresand cables comprises, by weight, 65 to 90% of a TPU matrix material, 10 to 30% of a phosphor nitrogen composite flame retardant system, and 1 to 5% of an auxiliary agent; the phosphor nitrogen composite flame retardant system comprises diethyl aluminium hypophosphite and a carbon forming component; the carbon forming agent is an insoluble infusible crosslinked polymer, and the crosslinking point structure is represented by formula I. The halogen-free flame-retardant TPU elastomer composition possesses molten drop resistance, high flame resistance, migration resistance, wear resistance, and oilresistance, is soft, and can be used for preparing wires and cables in the fields of new energy vehicle with requirements on high flame resistance, oil resistance, softness, and wear resistance.

Description

technical field [0001] The invention relates to the technical field of halogen-free flame-retardant TPU, in particular to a halogen-free flame-retardant TPU elastomer composition for electric wires and cables and a preparation method thereof. Background technique [0002] Polyurethane is a type of polymer whose main chain contains -NHCOO- repeating structural units, abbreviated as PU in English, which is polymerized from isocyanate (monomer) and hydroxyl compound. Because it contains a strong polar carbamate group, it is insoluble in non-polar solvents, and has good oil resistance, toughness, wear resistance, aging resistance, etc., and has been widely used in many fields. Polyurethane includes two types of materials, one is thermosetting PU, which is usually used in synthetic leather, foaming and other fields; the other is thermoplastic polyurethane, referred to as TPU, which has the processing method of thermoplastic materials and has the properties of thermosetting PU Fe...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L79/04C08K5/5313H01B3/30C08G73/06
CPCC08G73/0638C08K2201/003C08L75/04C08L2201/02C08L2201/22C08L2203/202H01B3/302C08L79/04C08K5/5313
Inventor 李金忠雷华
Owner 江苏利思德新材料股份有限公司
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