Revestimentos intumescentes

Ajudando a resfriar o aço

Um sistema intumescente é uma combinação de vários compostos que, em caso de fogo, reagem em conjunto em decorrência do aumento de temperatura para formar uma espuma de carbono. Essa espuma atinge uma espessura de 10 a 100 vezes maior que a do revestimento aplicado originalmente e isola o material do substrato por meio da sua baixa condutividade térmica. Em estruturas de aço, em especial, isso pode ser essencial, pois elas podem perder a estabilidade estrutural durante incêndios, quando as temperaturas excedem 500 °C. Exemplos dessas construções são aeroportos, shopping centers, hospitais e complexos de escritórios.

Como principal fornecedor do importante ingrediente polifosfato de amônia, a Clariant tem ampla experiência em matérias-primas para revestimentos intumescentes e no desenvolvimento de formulações para revestimentos intumescentes, à base de água ou de solvente.

Os produtos Exolit® AP utilizados são pós, finos e brancos, à base de polifosfato de amônia.

 

Serviço aos clientes

Há mais de 30 anos a Clariant é um dos principais fornecedores de retardantes de chamas à base de fósforo. Estamos preparados para ajudar nossos clientes a desenvolver formulações adequadas para revestimentos intumescentes.

Em nosso laboratório localizado em Knapsack, na Alemanha, podemos comparar a performance de várias formulações diferentes por meio de testes convencionais com fogo. Desse modo, podemos ajudar nossos clientes a desenvolver novas formulações que atendam às novas normas ou aos novos desafios referentes aos requisitos de segurança contra incêndio.

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Klaus Bender

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Produtos relevantes

  • Produtos Exolit® AP

    • Exolit® AP 420

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

    • 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. mais

    • 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. mais

    • 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. mais

    • 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. mais

    • 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. mais

    • 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. mais

    • 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. mais

    • 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 mais

    • 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. mais

    • 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. mais

    • 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. mais

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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. 


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