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Halogen flame retardant thermoplastic polyurethane

A thermoplastic polyurethane, flame retardant technology, used in insulated cables, electrical components, circuits, etc.

Active Publication Date: 2011-02-16
LUBRIZOL ADVANCED MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A 5 or 6 unit increase in LOI is a very significant increase and cannot be achieved by simply adding more halogenated flame retardant

Method used

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  • Halogen flame retardant thermoplastic polyurethane
  • Halogen flame retardant thermoplastic polyurethane
  • Halogen flame retardant thermoplastic polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0063] Examples 1-4 serve to demonstrate the effect of talc in halogenated flame retardant TPU formulations. The TPU used is a polyether TPU with 85 Shore A durometer. Example 2 is a comparative example without talc.

[0064] The results showed that the talc-free formulation of Example 2 (comparative example) was rated V-2 in the UL-94 test. Examples 1, 3 and 4 all showed V-0 ratings. It is very surprising that 5.0 wt% talc will improve the UL-94 performance from V-2 to V-0. The LOI% results were greater than 30 for all formulations.

[0065] The formulations and results for Examples 1-4 are shown in Tables I and II below, respectively.

[0066] Table I

[0067]

[0068] 1 TPU is polyether TPU with 85 Shore A hardness, made of 1000M n PTMEG, butanediol and MDI prepared, available from Lubrizol Advanced Materials, Inc. as Estane 58325 purchased.

[0069] 2 CPE is chlorinated polyethylene, available from Dow Chemical as Tyrin CM0132 was purchased.

[0070] 3 De...

Embodiment 5-7

[0077] Examples 5-7 are used to demonstrate flame retardant TPU formulations containing chlorine based flame retardants and antimony trioxide and talc. The TPU used in Examples 5-7 was an 85 Shore A durometer polyether TPU with 0.15% by weight trimethylpropane for light crosslinking and build weight average molecular weight.

[0078] All formulations showed a UL-94 test rating of V-0 with high LOI %.

[0079] The formulations and test results for Examples 5-7 are shown in Tables III and IV below, respectively.

[0080] Table III

[0081]

[0082] 7 TPU is polyether TPU with 85 Shore A hardness, made of 1000M n PTMEG, butanediol and MDI and 0.15% by weight trimethylpropane (TMP) prepared, available from Lubrizol Advanced Materials, Inc. as Estane 58315 purchased.

[0083] 2 CPE is chlorinated polyethylene, available from Dow Chemical as Tyrin CM0132 was purchased.

[0084] 3 Dechlorane Plus is C 18 h 12 Cl 12 Chlorinated flame retardants, available from OxyCh...

Embodiment 8

[0091] Examples 8 and 9 are used to demonstrate the mixing of two levels of talc (10% and 5% by weight) with a chlorinated flame retardant into a 95 Shore A hardness polyether TPU. Both formulations showed a UL-94 test rating of V-0 at 75 mils. The formulation with 10% by weight talc (Example 8) had an LOI% of 33 and the formulation with 5% by weight talc had an LOI% of 32. These examples show that even small amounts of talc are sufficient to obtain an LOI% of at least 30.

[0092] The formulations and test results for Examples 8-9 are shown in Tables V and VI below, respectively.

[0093] Table V

[0094]

[0095] 8 TPU is a 95 Shore A durometer polyether TPU available from Lubrizol Advanced Materials, Inc. as Estane 58212 purchased.

[0096] 2 CPE is chlorinated polyethylene, available from Dow Chemical as Tyrin CM0132 was purchased.

[0097] 3 Dechlorane Plus is C 18 h 12 Cl 12 Chlorinated flame retardants, available from OxyChem purchased.

[0098] 4 Vit...

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Abstract

Thermoplastic polyurethane (TPU) formulations are disclosed which comprise a halogenated flame retardant together with an antimony oxide and talc. The formulations exhibit a high LOI (at least 30) and are V-0 rated on the UL-94 test. The halogenated flame retardant can be a chlorinated or brominated compound. The antimony oxide compound is selected from the group consisting of antimony trioxide and antimony pentaoxide. When brominated flame retardants are used, talc is not required, but is preferred to meet the high LOI and V-0 rating. The TPU formulations are useful for wire and cable jacketing applications and for jacketing for fiber optic cables.

Description

technical field [0001] The present invention relates to a flame retardant thermoplastic polyurethane (TPU) composition, especially a flame retardant thermoplastic polyurethane composition comprising a halogenated flame retardant and talc. The TPU composition can be used in fields where high flame retardancy is required, such as the fields of electric wires and cables and optical fiber cables, blown films, molding fields, and the like. The invention also relates to methods of making TPU compositions and methods of making wire and cable jackets. Background technique [0002] Halogen additives, such as those based on fluorine, chlorine and bromine, have been used to impart flame retardant properties to TPU compositions. Chlorine- and bromine-based compounds are excellent choices for flame retardants for thermoplastics such as TPU polymers because they are relatively cheap, readily available, and highly effective. The amount of halogen-based flame retardants used can vary depe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/03C08K5/06C08K3/34C08L75/08C08L23/28C08K3/22H01B7/295C08K5/3417C08K13/02
CPCC08G18/6674C08G18/4854C08L75/08C08L23/286C08L75/04C08L2666/50C08L2666/32C08L2666/58C08L2666/06
Inventor S·K·斯德哈马里
Owner LUBRIZOL ADVANCED MATERIALS INC
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