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Flame retardant thermoplastic polyurethane compositions

A technology of thermoplastic polyurethane and composition, which is applied in the field of TPU composition, and can solve problems such as increased smoke density, impaired and lost clarity of TPU composition, etc.

Active Publication Date: 2013-11-20
LUBRIZOL ADVANCED MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although liquid flame retardant additives can be added to TPU compositions, they are generally known to cause a dramatic increase in smoke density when the composition is exposed to near-burning conditions
When traditional solid flame retardants are used, the clarity required for certain applications in the resulting TPU composition is often compromised or even completely lost

Method used

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  • Flame retardant thermoplastic polyurethane compositions
  • Flame retardant thermoplastic polyurethane compositions
  • Flame retardant thermoplastic polyurethane compositions

Examples

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Embodiment

[0102] The invention will be further illustrated by the following examples which show particularly advantageous embodiments. While these examples are provided to illustrate the invention, they are not intended to limit the invention.

[0103] All of the following examples were prepared by compounding the polymer blends on a twin screw extruder. Unless otherwise stated, these examples all used the same components: (i) thermoplastic polyurethane, which is commercially available from The Lubrizol Corporation product lines; (ii) polyphosphonate homopolymers commercially available from FRX Polymers Inc.; and (iii) inherently dissipative polymers commercially available from The Lubrizol TM Produced by Corporation Product Series. The blends in Example Group 2 also included additional performance additives. All components were compounded under conventional conditions in a twin-screw extruder. The resulting blend was then converted into a sheet having a thickness of 30-40 mils ...

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Abstract

The present invention relates to flame retardant thermoplastic polyurethane (TPU) compositions that are prepared by compounding certain TPU's and with a polyphosphonate homopolymer or copolymer, and more specifically TPU compositions that pass ASTM E84 Class 1 and UL94 V0 ratings. The invention also relates to compositions that further include an inherently dissipative polymer to provide a TPU composition that has flame retardant properties, electrostatic discharge performance, good clarity and / or transparency, or any combination thereof.

Description

field of invention [0001] The present invention relates to flame retardant thermoplastic polyurethanes (TPUs) prepared by blending specific TPUs with polyphosphonate polymers such as homopolymers or copolymers. More particularly, the present invention relates to TPU compositions that pass ASTM E84 Class I and UL94 V0 evaluation. The present invention also relates to compositions further comprising inherently dissipative polymers to provide a TPU composition having flame retardancy, electrostatic discharge properties, good clarity and / or transparency, or any combination thereof. Background of the invention [0002] The present invention relates to TPU compositions having good flame retardancy, and TPU compositions comprising static dissipative polymers in addition to good clarity and / or transparency. [0003] Improving the flame retardancy of TPU compositions is often extremely challenging. This is because TPU materials typically depolymerize into more flammable, lower mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K5/5333
CPCC08G18/42C08K5/5317C08K5/5333C08L75/04C08G18/48C08L75/06C08L75/08C08L2201/02C08L2201/04C08L2205/03C08L2205/035C08L85/02C08L71/02C08L67/00C08J3/20C08J5/00B29B7/18
Inventor 曹飞娜G·S·奈斯特罗德卢启威
Owner LUBRIZOL ADVANCED MATERIALS INC
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