Intumescent Coatings

Helping steel stay cool

An intumescent system is a combination of various compounds that in the event of fire react together as a result of the temperature increase to form a carbon foam. This foam attains a thickness of 10 to 100 times of the originally applied coating and insulates the substrate material through its low thermal conductivity. For steel-framed structures in particular this can be essential, because they can lose their structural stability during fires, when temperatures exceed 500 °C. Examples of such buildings are airports, shopping centers, hospitals and office complexes.

As a principal supplier of the key ingredient ammonium polyphosphate, Clariant has comprehensive experience in raw materials for intumescent coatings and in the development of intumescent coating formulations, either water or solvent based.

The Exolit® AP Products used are fine, white powders based on ammonium polyphosphate.

 

Service for our customers

Clariant has been a leading supplier of phosphorus based flame retardants for more than 30 years. We are in a position to support our customers to develop suitable intumescent coating formulations.

In our laboratory at Knapsack, Germany, we can compare the performance of a range of different formulations using standard fire tests. Thereby, we can support our customers in developing new formulations for meeting new standards or challenges in fire safety requirements.

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Klaus Bender

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Relevant Products

  • Exolit® AP Products

    • Exolit® AP 420

      Exolit AP 420 is an approx. 45 % clear to cloudy aqueous solution of a short-chain ammonium polyphosphate. more

    • Exolit® AP 422

      Exolit AP 422 is a fine-particle ammonium polyphosphate (phase II) produced by a special method. The product is largely insoluble in water and completely insoluble in organic solvents. It is colourless, non-hygroscopic and non-flammable. more

    • Exolit® AP 423

      Exolit AP 423 is a fine-particle ammonium polyphosphate produced by a special method. The crystal modification is phase II. The product is largely insoluble in water and completely insoluble in organic solvents. It is a white powder, non-hygroscopic and non-flammable. more

    • Exolit® AP 462

      Exolit AP 462 is a product based on ammonium polyphosphate. The crystal modification is phase II. It is manufactured from ammonium polyphosphate by micro-encapsulation with melamine resin according to Clariant’s own method. Exolit AP 462 is a fine-particle white powder with very low solubility in water, even at elevated temperatures. It is completely insoluble in organic solvents. The product is non-hygroscopic and non-flammable. more

    • Exolit® AP 740 F

      Exolit AP 740 F is a white free flowing powder. It is a non-halogenated additive flame retardant based on ammonium polyphosphate which develops its effectiveness through phosphorus/nitrogen synergism. Exolit AP 740 F differs in its mode of action from chlorine or bromine containing flame retardants by achieving its effect through intumescence. The flame retarded material foams on exposure to flame. The carbon foam layer so formed protects the polymer through its heat-insulating effect and reduces further oxygen access. more

    • Exolit® AP 740

      Exolit AP 740 is a white free flowing powder. It is a non-halogenated additive flame retardant based on ammonium polyphosphate which develops its effectiveness through phosphorus/nitrogen synergism. Exolit AP 740 differs in its mode of action from chlorine or bromine containing flame retardants by achieving its effect through intumescence. The flame retarded material foams on exposure to flame. The carbon foam layer so formed protects the polymer through its heat-insulating effect and reduces further oxygen access. more

    • Exolit® AP 742

      Exolit AP 742 is a non-halogenated, additive flame retardant based on ammonium polyphosphate, which develops its effectiveness through a phosphorus/nitrogen synergism. Exolit AP 742 differs in its mode of action from other flame retardant technologies (e.g. chlorine- or bromine-containing flame retardants and minerals) by achieving its effect through intumescence. The flame retarded material foams on exposure to flame. The carbon foam layer so formed protects the polymer by its heat-insulating effect and reduces further oxygen access. more

    • Exolit® AP 750

      Exolit AP 750 is a non-halogenated flame retardant based on ammonium polyphosphate as main component, which develops its effectiveness through phosphorus/nitrogen synergism. In contrast to similar competitive material, it shows high processing stability. Exolit AP 750 differs in its mode of action from non phosphorus-based flame retardants (e. g. brominated, chlorinated or mineral FRs like ATH) by achieving its effect through intumescence. Material containing Exolit AP 750 will foam on exposure to flame. The carbon-rich foam layer so formed will protect the polymer and in many cases the substrate below through its heat-insulating effect, reduces further oxygen access and prevents dripping in case of a thermoplastic based formulation. Beyond the primary effects on fire behavior such as reduction of flame propagation rate, rate of heat release, dripping behavior, residual lengths of test specimens after flame tests etc., positive secondary fire effects such as low smoke density, no release of corrosive off-gases, lower formation of toxic smoke gases are of great interest. more

    • Exolit® AP 755

      You will find Exolit® AP 755 now as Exolit® IFR 36. Sie finden Exolit® AP 755 nun unter Exolit® IFR 36. http://www.clariant.com/de/Solutions/Products/2014/06/05/13/42/Exolit-IFR-36 more

    • Exolit® AP 760

      Exolit AP 760 is a non-halogenated flame retardant based on ammonium polyphosphate, which develops its effectiveness through phosphorus / nitrogen synergism. When incorporated into thermoplastics, it exhibits high processing stability. Exolit AP 760 differs in its mode of action from chlorine- or bromine-containing flame retardants by achieving its effect through intumescence. The thermoplastic material foams on exposure to flame. The carbon foam layer so formed protects the polymer through its heat-insulating effect, reduces further oxygen access and prevents dripping of the thermoplastic. more

    • Exolit® AP 765 (TP)

      Exolit AP 765 is a non-halogenated flame retardant based on phosphorus and nitrogen synergism. The product achieves its flame retardant effect through intumescence. The thermoplastic material foams and crosslinks on exposure to flame and forms a stable char at the surface acting as a barrier. The protective layer provides a heat-insulation effect, reduces oxygen access and prevents dripping of molten polymer. more

    • Exolit® AP 766 (TP)

      Exolit AP 766 is a non-halogenated flame retardant based on phosphorus and nitrogen synergism. The product achieves its flame retardant effect through intumescence. The thermoplastic material foams and crosslinks on exposure to flame and forms a stable char at the surface acting as a barrier. The protective layer provides a heat-insulation effect, reduces oxygen access and prevents dripping of molten polymer. more

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January 11, 2013

Clariant Reveals Performance. People. Planet. Values in Action at ECS 2013

Clariant, a world leader in specialty chemicals, will bring its brand values Performance.People.Planet to life at the European Coatings Show 2013, in Nürnberg, Germany. Clariant will present a multitude of sustainable and innovative value-creating solutions for the global paints and coatings industry. more

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The EU Directive on the Restriction of certain Hazardous Substances in Electric and Electronic Equipment (RoHS, 2002/95/EC) was originally published in 2003. It banned the heavy metals cadmium, lead, chromium(VI), mercury as well as the brominated flame retardants PBBs and PBDEs in E&E equipment. There is a legislative mandate that the directive is revised regularly, and after long discussions in particular on any additions to the list of restricted substances, a “re-cast” was published as 2011/65/EU. Although there were strong proponents of further bans on halogenated flame retardants, no new substance bans (Annex II) were put in place more

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Cutting Edge Flame Retardants for Thin Parts

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This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application. 


* Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.

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