Halogen-free flame-retardant antistatic TPU (thermoplastic polyurethane) material and preparation method thereof

A flame retardant antistatic and antistatic agent technology, which is applied in the field of halogen-free flame retardant and antistatic materials and polyurethane materials, can solve the problems affecting the life safety of the parties involved, a large amount of toxic and harmful gases, and low char formation rate, etc., so as to facilitate industrial production , excellent mechanical properties, good effect

Inactive Publication Date: 2014-08-13
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the oxygen index of ordinary TPU is only 17.0% to 18.0%, which is a flammable material, and the char formation rate is low when burning, and it has a strong droplet phenomenon, which limits its application range; in order to enhance the flame retardancy of TPU, it is currently used The best method is to add a halogen-containing flame retardant to it, but the chlorine-containing flame retardant mainly achieves the flame-retardant effect through the gas-phase flame-retardant mechanism, and will release a large amount of toxic and harmful gases when burning, which not only pollutes the environment, but also seriously affects the life safety of the parties involved; In this context, chlorine-containing flame retardants have been banned by many countries, so it is necessary to develop a new type of halogen-free flame-retardant antistatic TPU material
[0004] In addition, due to the excellent electrical insulation properties of the TPU material (its volume resistivity is about 1×10 10 ~1×10 15 Ω·cm), it is easy to generate static electricity accumulation during use, causing dangers such as spontaneous combustion and explosion. Therefore, it is imminent to develop new antistatic polyurethane materials

Method used

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  • Halogen-free flame-retardant antistatic TPU (thermoplastic polyurethane) material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The method for preparing a halogen-free flame-retardant antistatic TPU material in this embodiment includes:

[0035] 1), material selection: in this embodiment, the selected raw materials are 85 parts of TPU (Shore A hardness is 85HA), 12 parts of flame retardant (magnesium diisobutylphosphinate), 2 parts of antistatic agent, and 0.2 parts of antioxidant part, 0.8 part of lubricant;

[0036] 2), mixing: mix the raw materials selected in step 1) in a high-speed mixer for 3 minutes;

[0037] 3) Pelletizing: put the raw materials mixed in step 2) into a twin-screw extruder, melt and knead, and extrude to granulate.

[0038] In the method for preparing halogen-free flame-retardant and antistatic TPU materials in this example, step 3) during granulation, the conveying section is 150°C, the melting section is 160°C, the mixing section is 170°C, the exhaust section is 180°C, and the homogenization section is 170°C. The screw speed is 350r / min.

[0039] In this example, the...

Embodiment 2

[0043] The method for preparing a halogen-free flame-retardant antistatic TPU material in this embodiment includes:

[0044] 1), material selection: in this embodiment, the selected raw materials are 64.7 parts of TPU (Shore A hardness is 70HA), 30 parts of flame retardant (calcium methyl ethyl phosphinate), 5 parts of antistatic agent, and 0.1 parts of antioxidant part, 0.2 part of lubricant;

[0045] 2), mixing: mix the raw materials selected in step 1) in a high-speed mixer for 4 minutes;

[0046] 3) Pelletizing: put the raw materials mixed in step 2) into a twin-screw extruder, melt and knead, and extrude to granulate.

[0047] In the method for preparing halogen-free flame-retardant and antistatic TPU materials in this example, step 3) during granulation, the conveying section is 160°C, the melting section is 170°C, the mixing section is 180°C, the exhaust section is 180°C, and the homogenization section is 180°C. The screw speed is 400r / min.

[0048] In this example, ...

Embodiment 3

[0052] The method for preparing a halogen-free flame-retardant antistatic TPU material in this embodiment includes:

[0053]1), material selection: in the present embodiment, the selected raw material is 79.5 parts of TPU (TPU with Shore A hardness of 80HA accounts for 50%, and TPU with Shore A hardness of 90HA accounts for 29.5%), flame retardant (lanthanum hypophosphite) 18 parts, 1 part of antistatic agent, 0.2 part of antioxidant, 0.3 part of lubricant;

[0054] 2), mixing: mix the raw materials selected in step 1) in a high-speed mixer for 5 minutes;

[0055] 3) Pelletizing: put the raw materials mixed in step 2) into a twin-screw extruder, melt and knead, and extrude to granulate.

[0056] In the method for preparing halogen-free flame-retardant and antistatic TPU materials in this example, step 3) during granulation, the conveying section is 150°C, the melting section is 180°C, the mixing section is 190°C, the exhaust section is 200°C, and the homogenization section is...

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Abstract

The invention the invention discloses a halogen-free flame-retardant antistatic TPU (thermoplastic polyurethane) material which is composed of 60-90 parts of thermoplastic polyurethane elastomer, 5-40 parts of flame retardant, 1-5 parts of antistatic agent, 0.1-0.5 part of antioxidant and 0.2-1 part of lubricant. The Shore hardness A of the TPU elastomer is 70-95HA, and the flame retardant is composed of one or more of alkyl hypophosphorous acid metal salts or hypophosphorous acid metal salts. The method comprises the following steps: proportionally selecting raw materials, uniformly mixing the selected raw materials, melting, compounding, and granulating by extrusion. The halogen-free flame-retardant antistatic TPU material has obviously lower surface resistivity and obviously higher flame-retardant grade under the condition of not influencing the tensile strength, fracture strength and Shore hardness A of the TPU substrate, is free of halogens, and has excellent flame-retardant and antistatic functions.

Description

technical field [0001] The invention belongs to the field of flame retardant and antistatic materials, and relates to a polyurethane material, in particular to a halogen-free flame retardant and antistatic material based on thermoplastic polyurethane elastomer. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a special polymer material between plastic and rubber. It is a (AB) n-type block polymer, which is usually obtained by polycondensation reaction of polyol and polyether or polyester. . TPU has good load-bearing capacity, shock resistance and shock absorption, and electrical insulation properties. [0003] However, the oxygen index of ordinary TPU is only 17.0% to 18.0%. The best method is to add a halogen-containing flame retardant to it, but the chlorine-containing flame retardant mainly achieves the flame-retardant effect through the gas-phase flame-retardant mechanism, and will release a large amount of toxic and harmful gases when burnin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L23/06C08K5/00C08K5/5313C08K5/103C08K5/17C08K5/098B29B9/06
Inventor 胡志吕强刘小林叶淑英刘罡肖利群陈健梁全才周雷
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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