Salen Copper Complexes: A Novel Flame Retardant for Thermoplastic Polyurethane

Fontaine, Gaëlle; Turf, Thomas; Bourbigot, Serge

doi:10.1021/bk-2009-1013.ch020

Cited by 22 publications

(39 citation statements)

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“…N,N 0 -Bis(salicylidene)ethylenediamine (L1) and N,N 0 -bis(4-hydroxysalicylidene)ethylenediamine (L2) and N,N 0 -bis(5-hydroxysalicylidene)ethylenediamine (L3) were synthesized based on earlier report. 4 2.2. Formulations, processing and sampling 2.2.1.…”

Section: Methodsmentioning

confidence: 99%

“…Blending of L1-L3 in TPU was performed with a dosage of 10 wt% as reported before. 4 Bright yellow color of L1 impart yellow color in L1-TPU, yellow-orange color of L2 to red color in L2-TPU and beige color of L3 to yellowish-brown to L3-TPU. We have particularly focused on resorcinol based 'Salen' additive (L2, Fig.…”

Section: Thermoplastic Polyurethane Additives and Formulationsmentioning

confidence: 99%

“…1,2 They are used in a wide variety of applications including adhesives, sealants, coatings, bers, injection molded components, thermoplastic parts, industrial cables, energy exploration, automotive, transportation etc. [1][2][3][4][5] On the downside the ammability of PU materials presents a threat to both the performance and integrity of the product. Further re degraded products contribute to environmental pollution and health risks.…”

Section: Introductionmentioning

confidence: 99%

“…FRs are also capable of acting in gas phase by various mechanism. [6][7][8][9] Recently Fontaine et al 4 introduced a non-halogen, nonphosphorus, and relatively simple organic framework of 'Salen' (Fig. 1a) and their metal chelates to the ame retardancy of thermoplastic polyurethane elastomer (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Salen based Schiff bases to flame retard thermoplastic polyurethane mimicking operational strategies of thermosetting resin

et al. 2015

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A classical Schiff base N,N 0 -bis(4-hydroxysalicylidene)ethylenediamine (L2), a member of the Salen group that has been introduced as a non-phosphorus and non-halogen flame retardant in thermoplastic polyurethane (TPU) is found to operate in an intriguing way to fire retard the material. L2 blended with TPU significantly improves the inherent flammability of TPU without a synergist. A plausible mechanism including intermediates in the reinforcement of this elastomer towards flame retardancy is elaborated in line with the char forming abilities of this b-resorcylaldehyde based Schiff base. Conclusions were drawn based on the input from thermal, spectroscopic, microscopic and operando spectroscopic techniques.While its un-substituted counterpart, N,N 0 -bis(salicylidene)ethylenediamine (L1) lags behind in performance, its structural isomer N,N 0 -bis(5-hydroxysalicylidene)ethylenediamine (L3) is equally efficient but exhibits another mechanism of action. The performance of L2-TPU is found to be mainly in a condensed phase and is due to decoding of intrinsic cross-linking ability of the key building block of the additive i.e. resorcinol via structural transformation over a range of temperature. This results in the methylene bridged phenolic resin type material having high temperature stability. The process is also found to interfere with TPU unzipping process delaying its thermal degradation and favoring extensive cross-linking promoting char formation with insulative properties.

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Section: Methodsmentioning

confidence: 99%

Section: Thermoplastic Polyurethane Additives and Formulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Salen based Schiff bases to flame retard thermoplastic polyurethane mimicking operational strategies of thermosetting resin

et al. 2015

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“…Therefore, in order to increase and exploit their commercial application, the research on how to reduce the fire hazard of TPU has attracted more and more attentions. Up to now, many measures have been used to improve the fire safety of TPU and have achieved a certain progress . In general, the most simple and effective way to improve the fire safety of TPU is using fire safety agents .…”

Section: Introductionmentioning

confidence: 99%

Fire safety of thermoplastic polyurethane based on pyromellitic dianhydride

2018

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Summary In this paper, pyromellitic dianhydride (PMDA) was firstly used as fire safety agent for thermoplastic polyurethane (TPU). And, the fire safety improvement of PMDA in TPU was intensively investigated by limiting oxygen index (LOI), smoke density test (SDT), cone calorimeter test, and thermogravimetric/infrared spectroscopy, respectively. It has been found that PMDA could significantly improve the ignition level, and the LOI value increase to 28.5% when 8.0 wt% PMDA was incorporated into TPU; PMDA also could effectively suppress the smoke production and heat release during the combustion process. The peak heat release rate and total smoke release of the sample with 8.0 wt% PMDA were decreased by 68% and 22% compared with pure TPU in cone calorimeter test. The thermogravimetric/infrared spectroscopy results showed that PMDA could improve the thermal stability of TPU composites at high temperature and increased the release of CO2, H2O, and so on. All results confirmed that PMDA would have a good prospect in reducing the fire hazard of TPU.

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