High-flame-retardance high-heat-resistance halogen-free flame-retardant thermoplastic polyurethane elastomer cable material and preparation method thereof

A thermoplastic polyurethane and elastomer technology, applied in the direction of insulated cables, cables, conductors, etc., can solve the problems of low temperature resistance grade of cable materials, narrow processing temperature range, difficult cable materials, etc., and achieve excellent flame retardant performance and temperature resistance. performance, improved brightness, improved heat resistance

Inactive Publication Date: 2012-12-12
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current technology of halogen-free flame-retardant thermoplastic polyurethane elastomer cable materials has the following difficulties: (1) the processing temperature range is very narrow, it is very sensitive to temperature, and it is difficult to extrude; (2) the heat resistance of TPU material itself is poor, It is very difficult to prepare high heat-resistant cable materials; (3) TPU melts and drips seriously when it is burned, and it is very difficult to achieve a higher level of flame retardancy; (4) The traditional intumescent flame retardant used It is easy to migrate when exposed to water, making the surface of the materi

Method used

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  • High-flame-retardance high-heat-resistance halogen-free flame-retardant thermoplastic polyurethane elastomer cable material and preparation method thereof
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  • High-flame-retardance high-heat-resistance halogen-free flame-retardant thermoplastic polyurethane elastomer cable material and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0044] Example 1:

[0045] The proportions of the raw material components in the formula were carried out with reference to Example 1 in Table 1.

[0046] The preparation method is as follows: Weigh each component according to the raw material formula, first add the styrene elastomer (SEEPS) into the mixer, spray the plasticizer (industrial white oil), stir for 30 minutes, and then add the TPU and the new phosphorus nitrogen Add flame retardant, silica, siloxane, antioxidant 1010 and 168 and PE masterbatch into the mixer and mix for 30 minutes, and mix well. Put the mixed raw materials into the twin-screw extruder, the feeding speed is 80rpm / min, the screw speed is 600rpm / min, the length-to-diameter ratio of the screw is 25, the processing temperature of the twin-screw: the first stage is 180℃, The second stage is 190℃, the third stage is 190℃, the fourth stage is 200℃, the fifth stage is 200℃, and the sixth stage is 200℃. The halogen-free flame-retardant thermoplastic polyurethan...

Example Embodiment

[0049] Example 2:

[0050] The ratio of the raw material components in the formula was carried out with reference to Example 2 in Table 1.

[0051] The preparation method and test method are the same as in Example 1.

[0052] Compared with Example 1, the content of SEEPS in this example is increased. The test results are shown in Example 2 of Table 2. The results show that after the content of SEEPS increases, the heat resistance of the prepared cable material is improved, and the tensile strength is With a lower rate of decrease, the elongation at break increases, and the flame retardancy is good. It can pass the VW-1 vertical burning test. The cable is soft and elastic, and the surface is smooth and matte. There is no flame retardant migration after being placed for a period of time. It is suitable for the production of communication cables, marine cables, automotive cables and computer peripheral cables.

Example Embodiment

[0053] Example 3:

[0054] The proportions of the raw material components in the formula were carried out with reference to Example 3 in Table 1.

[0055] The preparation method and test method are the same as in Example 1.

[0056] Compared with Example 2, in this example, the content of SEEPS was increased to 28%, the content of TPU was reduced to 30%, and the amount of flame retardant was slightly increased. The test results are shown in Table 2 and Example 3. The results show that: SEEPS After the content of the cable is increased to 28%, the heat resistance of the prepared cable material is improved more obviously, and the mechanical properties remain basically unchanged, indicating that the increase of the SEEPS content has a great effect on the improvement of the heat resistance, and the prepared cable material has good flame retardancy , It is softer, feels good, oil-resistant, abrasion-resistant, smooth and matte, no flame retardant migration after a period of time, suitabl...

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Abstract

The invention relates to a high-flame-retardance high-heat-resistance halogen-free flame-retardant thermoplastic polyurethane elastomer cable material and a preparation method thereof, belonging to the field of halogen-free flame-retardant cable materials. The cable material is prepared from the following raw materials in percentage by weight: 20-50% of thermoplastic polyurethane elastomer, 15-40% of styrene elastomer, 3-8% of plasticizer, 20-30% of expansion flame retardant, 4-7% of flatting agent, 0.5-1% of lubricant, 0.5-1% of antioxidant and 1.5-3% of master batch. The thermoplastic polyurethane elastomer is a polyether-type thermoplastic polyurethane elastomer of which the hardness range is Shore A 60-90. The invention improves the problem of too narrow processing temperature region for the thermoplastic polyurethane elastomer cable material, and also improves the heat resistance of the cable material. The thermoplastic polyurethane elastomer, which is used as a base, is subjected to melt blending with the high-temperature-resistant material; and the novel expansion flame retardant which is nonmigratory in contact with water is used as the flame retardant of the base.

Description

Technical field: [0001] The invention relates to a halogen-free flame-retardant cable sheathing material and insulation material with thermoplastic polyurethane elastomer as a matrix resin, in particular to a formula of a halogen-free flame-retardant cable material. Background technique: [0002] Wires and cables have been used in the transmission of various electrical energy and signals for many years. Due to their light weight, excellent electrical insulation and easy molding, polymer materials have become the first choice for wire and cable materials. Traditional PVC cable materials, because they contain chlorine elements, have very good flame retardancy and are widely used in wire and cable materials. However, when it burns, it generates a large amount of toxic gas and smoke, which seriously endangers people's lives and property safety. The hydrogen chloride gas released when the PVC cable material is burned can also cause corrosion to the equipment, thereby causing "se...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L53/02C08K13/04C08K7/22C08K3/36C08J3/22H01B7/295
Inventor 李红霞张立群田明王炎祥梁文利胡伟康胡新兵
Owner BEIJING UNIV OF CHEM TECH
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