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| Clariant's comprehensive line of CESA additive masterbatches offers unprecedented opportunities to improve the properties, performance and quality of finished products, while also optimizing productivity and costs. |
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Since almost all plastics are based on hydrocarbons, they are combustible. CESA-flam flame retardant masterbatches help to protect people and property by delaying the spread of fire and toxic by-products and, in some cases, preventing ignition entirely.
Unlike reactive flame retardants, which are incorporated into the polymer molecule during polymerization, flame retardant masterbatches allow variable dosing levels and thus flexibility during processing. The effect may be either physical or chemical, occurring in either the gaseous or solid phase. |
| | FLAME RETARDANCY |
| The most common flame retardants include the following: |  |
The effectiveness of inorganic hydroxides (such as magnesium hydroxide and aluminum) is based on the dilution of the plastic as a combustible material. Becuase of their very high dosage requirement (>50%), inorganic hydroxides are preferably used in compounding.
Halogenated flame retardants (e.g., brominated and antimony systems) actively intervene in the free-radical-based combustion reactions in the gaseous phase and form less reactive by-products. This delays or interrupts auto-catalytic combustion. Highly efficient, halogenated flame retardant additives are especially suitable for manufacturing flame retardant concentrates. |
 | | Compounds containing phosphorous, which facilitate the formation of a protective layer of carbon via the phosphoric acid produced during a fire. There have specific effects that are less universal in application.
Intumescent systems, which cause the formation of a protective ceramic-like layer via a combination of active agents (organophosphorous compounds combined with a "foaming agent"). Intumescent systems also have limited applications.
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| CESA-flam masterbatches offer a wide range of very efficient and universally usable halogenated flame retardants, as well as some specific halogen-free solutions. They are used primarily for extrusion and injection molding applications in LDPE, LLDPE, HDPE, PP, PS, ABS and engineering resins. A few CESA-flam grades have been specifically designed for fiber applications. |
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