Fire Retardancy of Polypropylene Composites Using Intumescent Coatings

Duquesne, Sophie; Renaut, Nicolas; Bardollet, P.; Jama, Charafeddine; Traisnel, Michel; Delobel, René

doi:10.1021/bk-2009-1013.ch012

Cited by 5 publications

(6 citation statements)

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“…Duquesne et al first reported on the use of a commercial intumescent coating on polypropylene (PP) filled with talc or calcium carbonate [6]. Deposition of 100-150 mm thick layers was obtained by brush on specimens suitable for standard UL94 classification and glow wire test.…”

Section: Intumescent Coatingsmentioning

confidence: 99%

Materials engineering for surface-confined flame retardancy

Malucelli

Carosio

Alongi

et al. 2014

Materials Science and Engineering: R: Reports

143

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Section: Intumescent Coatingsmentioning

confidence: 99%

Materials engineering for surface-confined flame retardancy

Malucelli

Carosio

Alongi

et al. 2014

Materials Science and Engineering: R: Reports

143

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“…Intumescent coatings are very rarely applied on polymers, usually because of their bad adhesion. In previous articles, 14,15 we showed that by making a preliminary flame treatment on polypropylene, polypropylene composites and polycarbonate, a good adhesion of waterborne intumescent coatings and varnishes could be achieved, thus allowing the intumescent coating to protect efficiently the polymeric substrates in case of a fire. In fact, passing a flame very rapidly onto a surface allows cleaning it from organic residues, oxidizing it (creation of hydroxyl or carboxylic functions) and improving its wettability, thus enabling a good contact between the coating and the surface.…”

Section: Resultsmentioning

confidence: 99%

“…Intumescent varnishes are generally developed for wood and metals as they usually show poor adhesion to polymers. However, as detailed in precedent articles, 14,15 an adequate treatment of the polymer surface allows improving the adhesion between the coating and the polymeric substrate, and thus allows keeping the properties of the intumescent coating during a fire.…”

Section: Introductionmentioning

confidence: 99%

New routes to flame retard polyamide 6,6 for electrical applications

Jimenez

Gallou

Duquesne

et al. 2012

Journal of Fire Sciences

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Polyamide 6,6 is used in many industrial fields such as housing materials, transport or electrical engineering applications. Due to its chemical composition, this polymer is easily flammable. As far as the main applications concern electrical and electronic equipments, its flame-retardant properties become an important requirement. The most discriminating tests are the limiting oxygen index, UL94 and glow wire flammability index. The aim is to obtain high limiting oxygen index values, V0 rating at UL94 test for 1.6- or 0.8-mm-thick samples and a validation at 960°C of the glow wire flammability index. The usual way to fire retard polyamide 6,6 consists of incorporating an important loading of fire-retardant additives, which often reduce the intrinsic properties of the polymer. It is also difficult to combine a thin polymer thickness (e.g. 0.8 mm) and a high amount of additives because of processing issues. In this article, we first carried out a rapid screening to determine the best fire retardant for polyamide 6,6 and its optimized amount to achieve the previously defined fire retardant properties. It was shown that an amount of 23% of aluminium diethylphosphinate Exolit OP1230 allows reaching the requirements. Then, carrying out two different surface treatments (coating of polysiloxanes by plasma-enhanced chemical vapour deposition and use of an intumescent waterborne varnish), we have tried to reach the same results. It was shown that the use of surface treatment alone does not allow reaching the objectives. As a consequence, the combination of the bulk approach at low loadings with the surface treatment was investigated. This new route allows the combination of the condensed phase mechanism of the intumescent barrier with the gas phase mechanism of the OP1230 and leads to very good results: the use of 5% of the flame-retardant additives combined with a 100-µm-thick waterborne intumescent varnish leads to better results than a 23% of additive loading.

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“…Intumescent coatings have been used in a number of applications, including the thermal protection of steel structures. 28 Intumescent coatings have also been evaluated for use on polymer substrates such as glass-reinforced plastics (GRP) 13 and polyureas. 29 They consist of a resin matrix and an intumescent filler (e.g.…”

Section: Coatingsmentioning

confidence: 99%

Development of polyureas with improved fire resistance

Underhill¹,

DiLoreto²,

DiLoreto³

2012

Journal of Fire Sciences

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The demand for improved damage control materials to address high strain rate impact has led to exploration of polyureas in this role. Polyureas show potential for retrofitting pre-existing platforms because they can be applied as a spray and have extremely fast cure times and low volatile organic compounds. However, they have been limited in use in enclosed spaces because of their flammability. In this article, synthetic and additive routes to improve polyurea flame retardancy are systematically explored. The US Department of Defense test method standard Military Standard 2031 has been used as a target to meet or exceed for flammability properties. This article will outline the changes in polymer chemistry, the addition of fire-retardant additives, and the use of ignition barrier coatings that led to a composition that exceeded the military standard.

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Fire Retardancy of Polypropylene Composites Using Intumescent Coatings

Cited by 5 publications

References 0 publications

Materials engineering for surface-confined flame retardancy

Materials engineering for surface-confined flame retardancy

New routes to flame retard polyamide 6,6 for electrical applications

Development of polyureas with improved fire resistance

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