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03-12-2014

Exolit Flame Retardants

For Aircraft, Rail, Road and Sea Transport Applications

Exolite flame retardants help to meet stricter flammability requirements, such as the new European railway standard EN 45545-2

Exolite flame retardants help to meet stricter flammability requirements, such as the new European railway standard EN 45545-2

Clariant’s high-performance Exolit AP Ammonium Polyphosphate-based and Exolit OP Phosphinates-based flame retardants for thermoset systems address the key challenges of modern vehicle manufacture, with its increasing trend toward lightweight structual parts.

Exolit flame retardants for unsaturated polyester and epoxy resins support the aviation, road, rail and shipping sectors in fulfilling today’s stricter flammability requirements, meeting environmental targets through the use of materials with corresponding health and environmental profiles, and in achieving greater cost-efficiency without compromising on fire protection and hazard levels. Their advantage lies in their effectiveness for composites and laminates, which enables very low concentrations to be used, while at the same time meeting stringent flammability requirements.

Composites with the halogen-free Exolit flame retardants have low heat release rates (figure: Clariant)

Composites with the halogen-free Exolit flame retardants have low heat release rates (figure: Clariant)

Available for sole use or as synergistic formulations with aluminium hydroxide (ATH), Exolit AP enables thermoset resins used in fiberglass reinforced composites to reach high flammability requirements and fire standards such as under the new EU wide railway standard EN 45545-2 for interiors. With Exolit flame retardants the customer can prepare composites and laminates which fulfil the Hazard Level (HL) 2 and HL 3 requirements under EN 45545-2. Composites with the halogen-free Exolit flame retardants show advantages in smoke toxicity measurements (EN ISO 5659-2) and have in addition low heat release rates. If tested under ISO 5660-1 in the cone calorimeter, the required low MARHE (Maximum Average Rate of Heat Emission) numbers for HL 2 ad HL 3 can be reached.

In addition, Exolit grades can be used to formulate intumescent (gel)-coats which drastically improve the fire endurance of the whole composite part. Exolit flame retardants are suited to traditional hand lay-up process, as well as pultrusion and other advanced techniques. For electrical markets, all Exolit products are fully compliant with current WEEE and RoHS regulations (European Directives on Waste Electrical and Electronic Equipment and Restriction of certain Hazardous Substances in Electric and Electronic Equipment). For thermoset systems, Exolit AP grades allow low smoke density and do not release corrosive gases.

Company profile

Clariant International Ltd.

Rothausstraße 61
CH 4132 MUTTENZ 1
Tel.: +41 61 4697747
Fax: +41 61 4697587

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