For adhesives and sealants based on acrylates and silicones, Clariant offers various flame retardants:
Flame Retardants -
based on ammonium phosphates | Exolit AP | These intumescent FR systems are fine, white powders which develop their flame-retardant effect in the condensed phase (on the surface of the protected material). |
Flame Retardants -
based on red phosphorus | Exolit RP | Special red phosphorus powders, which are produced with Clariant know-how. They can also be supplied in various customer-tailored dispersions. |
Here (
www.exolit.com) you will find more information on our Exolit flame retardants.
Exolit in Adhesives
Adhesives are divided into physically and chemically hardening types. The first group includes hot-melt adhesives and pressure sensitive adhesives, while the second comprises two-pack adhesives, such as those based on epoxy and UP resins. These types of adhesive are used mainly in the construction and automotive sectors and are therefore required to achieve the relevant flammability ratings.
Advantages of Exolit AP
- readily dispersible and processable solid
- no migration, no emissions, i.e. can be used in interiors
Advantages of Exolit RP
- very effective
- can meet very high fire resistance requirements
Exolit in Sealants
Sealants are gunned into joints and must possess sufficient adhesion to the joint faces to accommodate strain, compression and shear without losing their function as joint sealants. Polymer sealants include acrylates (solvent-based acrylates and acrylate dispersions), PU (1-component, 2-component) and silicones. This sealants group also includes elastomer sealing strips. Because they are used in the construction sector (for interior and exterior applications), sealants are also subject to the relevant fire tests. Depending on their intended application, they must meet the requirements for flammability classes. In addition, fire resistance tests are often required. In this case the sealing compound must be tested in the assembled component (e.g. complete with sealed joint).
Advantages of Exolit AP in acrylates and silicones:
- readily dispersible solid
- very effective, i.e. the relevant flammability classes
- can be achieved with only small additions of product