Flame retardant thermoplastic polyurethane elastomer (TPU) and preparation method thereof

A thermoplastic polyurethane and elastomer technology, which is used in the compounding of ionic liquids and intumescent flame retardants and their application in flame retardant polyurethane elastomers, to improve vertical combustion performance, reduce total heat release, and improve droplet resistance. sexual effect

Active Publication Date: 2016-03-30
盛鼎高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ionic liquids have a certain research basis as flame retardants for polymer materials, but there are few reports on the application of ionic liquids as co-intumescent flame retardants in thermoplastic polyurethane elastomers

Method used

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  • Flame retardant thermoplastic polyurethane elastomer (TPU) and preparation method thereof
  • Flame retardant thermoplastic polyurethane elastomer (TPU) and preparation method thereof
  • Flame retardant thermoplastic polyurethane elastomer (TPU) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 0.125wt% ionic liquid, 85wt% TPU, and 14.875wt% ammonium polyphosphate to the internal mixer with a mass ratio of 0.125wt% to the total mass of the system, and melt blend for 10 minutes at 170°C and 30 rpm. A flame-retardant thermoplastic polyurethane is obtained. Pressed and cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size is tested, the limiting oxygen index reaches 30.4, the vertical combustion level can reach UL94V-0, and the peak heat release rate is 121kW / m 2 , the total burning time is 900s.

Embodiment 2

[0025] Add 0.25wt% ionic liquid, 85wt% TPU, and 14.75wt% ammonium polyphosphate to the internal mixer with a mass ratio of 0.25wt% to the total mass of the system, and melt blend for 10 minutes at 170°C and 30 rpm. A flame-retardant thermoplastic polyurethane is obtained. Pressed and cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size is tested, the limiting oxygen index reaches 31.2, the vertical combustion level can reach UL94V-0, and the peak heat release rate is 86kW / m 2 , the total burning time is 835s.

Embodiment 3

[0027] Add 0.5wt% ionic liquid, 85wt% TPU, and 14.5wt% ammonium polyphosphate to the internal mixer with a mass ratio of 0.5wt% to the total mass of the system, melt and blend for 10 minutes at 170°C and a speed of 30 rpm, A flame-retardant thermoplastic polyurethane is obtained. Pressed and cut into 130×6.5×3mm 3 , 130×13×3mm 3 and 100×100×3mm 3 The standard size is tested, the limiting oxygen index reaches 32.5, the vertical combustion level can reach UL94V-0, and the peak heat release rate is 93kW / m 2 , the total burning time is 790s.

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Abstract

The invention relates to a flame retardant thermoplastic polyurethane elastomer (TPU) and a preparation method thereof. The flame retardant TPU comprises the following components in parts by mass: 70-90 parts of TPU, 9.7-29.875 parts of intumescent flame retardants and 0.025-3.75 parts of ionic liquids. The intumescent flame retardant TPU composite material is prepared by adopting the composite intumescent flame retardant. The vertical flame test level of the composite material is increased to V-0. A dense intumescent char layer is formed on the specimen surface of the composite material, so that the composite material has good flame retardant effects. Under the condition of small additive amount of the ionic liquids, the oxygen index of the ionic liquid and intumescent flame retardant synergistic flame retardant TPU composite material is increased, so that the vertical flame performance embodying molten drop resistance is obviously improved, the heat release rate and total heat release can be well reduced, the charring performance during flaming is improved and the composite material has certain effects on smoke suppression.

Description

technical field [0001] The invention belongs to the technical field of modification of flame-retardant thermoplastic plastics, in particular to the compounding of ionic liquid and expansion type flame retardant and its application in flame-retardant polyurethane elastomer. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is one of the plastics commonly used in daily life. Its characteristics combine the processing performance of plastics and the physical and mechanical properties of rubber. It has high elasticity, high strength, high wear resistance, radiation resistance, Mechanical properties such as oil resistance, low temperature brittleness resistance and hardness can be adjusted in a wide range. However, the application of TPU also has limitations, and it is extremely easy to burn. When TPU burns, the flame is violent and accompanied by thick black smoke, and the heat release is large. Limitations, so the research of flame-retardant thermoplasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K5/3472C08K3/32C08K5/5313
CPCC08K3/32C08K5/3472C08K5/5313C08K2003/323C08L2201/02C08L2201/08C08L2207/04C08L75/04
Inventor 焦传梅赵利陈希磊
Owner 盛鼎高新材料有限公司
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