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Halogen-free flame retardant conductive TPU material and preparation technique thereof

A technology of conductive agent and flame retardant, which is applied in the field of halogen-free flame retardant conductive TPU material and its preparation technology, can solve the problems of low carbon formation rate, molten drop phenomenon, limited application scope, etc., and achieves low addition amount and conductive effect. Good, improve the effect of surface activity

Inactive Publication Date: 2017-03-29
SHANDONG FANGDING SAFETY GLASS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen index of ordinary TPU is only 17.0% to 18.0%, which is a flammable material, and the charring rate is low when burning, and it has a strong droplet phenomenon, which limits its application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In the embodiment of the present invention, a halogen-free flame-retardant conductive TPU material, the raw materials according to weight parts include: 50 parts of thermoplastic polyurethane elastomer, 0.05 parts of heat stabilizer, 3 parts of flame retardant, 0.1 part of alkali metal salt, lubricant 0.05 parts, antioxidant 0.05 parts.

[0015] A preparation process of a halogen-free flame-retardant conductive TPU material. Weigh thermoplastic polyurethane elastomers, heat stabilizers, flame retardants, alkali metal salts, lubricants, and antioxidants by weight, and mix them in a high-mixer for 2 Minutes, discharge, and then use a twin-screw extruder to extrude and granulate to obtain the TPU material; wherein the processing temperature of the twin-screw extruder is 140 ° C, and the screw speed is 20 Hz.

Embodiment 2

[0017] In the embodiment of the present invention, a halogen-free flame-retardant conductive TPU material, the raw materials according to parts by weight include: 100 parts of thermoplastic polyurethane elastomer, 4 parts of heat stabilizer, 20 parts of auxiliary conductive agent, 50 parts of flame retardant, alkali metal 25 parts of salt, 3 parts of lubricant, 4 parts of antioxidant. The conductive aid is silicon dioxide.

[0018] A preparation process of a halogen-free flame-retardant conductive TPU material, by weighing thermoplastic polyurethane elastomer, heat stabilizer, auxiliary conductive agent, flame retardant, alkali metal salt, lubricant, antioxidant, put into high-mixing Mix in the machine for 10 minutes, discharge the material, and then use a twin-screw extruder to extrude and granulate to obtain the TPU material; the processing temperature of the twin-screw extruder is 190°C, and the screw rotation speed is 40Hz.

Embodiment 3

[0020] In the embodiment of the present invention, a halogen-free flame-retardant conductive TPU material, the raw materials in parts by weight include: 55 parts of thermoplastic polyurethane elastomer, 0.08 parts of heat stabilizer, 1 part of conductive auxiliary agent, 4 parts of flame retardant, alkali metal 0.5 part of salt, 0.1 part of lubricant, and 0.08 part of antioxidant. The conductive aid is silicon dioxide.

[0021] A preparation process of a halogen-free flame-retardant conductive TPU material, by weighing thermoplastic polyurethane elastomer, heat stabilizer, auxiliary conductive agent, flame retardant, alkali metal salt, lubricant, antioxidant, put into high-mixing Mix in the machine for 3 minutes, discharge, and then use a twin-screw extruder to extrude and granulate to obtain the TPU material; the processing temperature of the twin-screw extruder is 145°C, and the screw speed is 25Hz.

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Abstract

The invention discloses a halogen-free flame retardant conductive TPU material and a preparation technique thereof. The TPU material is prepared from, by weight, 50-100 parts of thermoplastic polyurethane elastomer, 0.05-4 parts of heat stabilizer, 0-20 parts of assistant conductive agent, 3-50 parts of fire retardant, 0.1-25 parts of alkali metal salt, 0.05-3 parts of lubricant, and 0.05-4 parts of antioxygen. The preparation technique includes steps of weighing thermoplastic polyurethane elastomer, heat stabilizer, assistant conductive agent, fire retardant, alkali metal salt, lubricant, and antioxygen by weight, putting components in a high-speed mixer and mixing for 2-10 minutes; discharging, and then extruding and prilling the mixture by a dual-screw extruder and obtaining the TPU material, wherein the processing temperature of the dual-screw extruder is 140-190 DEG C, and the rotate number of the screw is 20-40 Hz. The prepared TPU material is low-smoke and toxic-free, low in addition, and high in flame retarding efficiency; besides, the TPU material is good in conducting effect, shallow in color, low in cost, good in heat resistance and others; the raw material is low in cost, and the TPU material is convenient to process and can facilitate industrial production.

Description

technical field [0001] The invention relates to the technical field of thermoplastic polyurethane elastomer materials, in particular to a halogen-free flame-retardant conductive TPU material and a preparation process thereof. Background technique [0002] Thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, referred to as TPU, is a (AB) n-type block linear polymer, A is a high molecular weight (1000~6000) polyester or polyether, and B is a polyester or polyether containing 2~12 straight Diols with chain carbon atoms, the chemical structure between AB chain segments is diisocyanate. It consists of a flexible soft segment and a rigid hard segment. TPU with different segment structures have different properties, and the type of segment structure is mainly determined by the type of raw materials. The introduction of side groups in the molecular structure will reduce the orientation crystallinity between macromolecules, resulting in a decrease ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K13/02C08K5/00C08K3/36
CPCC08K13/02C08K3/36C08K5/005C08L2201/02C08L2201/08C08L2207/04C08L75/04
Inventor 王超
Owner SHANDONG FANGDING SAFETY GLASS TECH CO LTD
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