Exolit® AP 750
Intumescent system based on APP, especially for thermoset polymers
- Edition Date :
- May 28, 2014
- Non-halogenated flame retardant based on ammonium polyphosphate as main component, which develops its effectiveness through phosphorus/nitrogen synergism
- Shows high processing stability in contrast to similar competitive material
- 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
- Particularly effective in thermoplastic polyolefins (e. g. polyolefin hotmelts), urethanes (e. g. integral skin foams, rigid foams, sealants), and epoxy resins (adhesives, sealants, structural laminates, gelcoats)
- Positive secondary fire effects such as low smoke density, lower formation of toxic smoke or corrosive gases
- Non-halogenated flame retardant with favorable environmental and health profile
Safety and MSDSFor regulatory details such as the classification and labelling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet.
Please contact us for safety and regulatory details or the Material Safety Data Sheet (MSDS).
Characteristics Unit Target value DS¹) TD²) Test method Phosphorus % (w/w) 20.0 - 22.0
Photometry after oxidizing dissolution; (11/17) Water / Moisture % (w/w) approx. 0.5
Nitrogen % (w/w) 11.5 - 13.5
Elemental analysis; (11/07) Density g/cm³ approx. 1.8
Bulk Density g/cm³ approx. 0.6
Value after filling Decomposition Temperature °C > 250
¹) Delivery specification: The product is monitored on a regular basis to ensure that it adheres to the specified values. Test methods: Clariant method numbers 11/xx in brackets.
²) Technical data: The technical data are used solely to describe the product and are not subject to regular monitoring.
ApplicationsExolit AP 750 is particularly effective in thermoplastic polyolefins (e. g. polyolefin hotmelts), urethanes (e. g. integral skin foams, rigid foams, sealants) and epoxy resins (adhesives, sealants, structural laminates, gelcoats). For epoxy resins used in Electrical/Electronics application, other Exolit products can be recommended depending on certain requirements. Please contact us to discuss your requirements in detail.
Thanks to its intumescent behavior, the use of Exolit AP 750 is particularly useful in epoxy based gelcoats or PU coatings. Beyond the reduced flammability of the gelcoat itself, the char foam created when exposed to flame may also further thermally insulate the underlaying substrate (e. g. a structural composite part). Depending on the fire test and classification to pass, the whole system (laminate + gelcoat) could pass the test by only adding Exolit AP 750 in the gelcoat. For more demanding requirements (e. g. M1 according to NF P 92501), only minimal amounts of additional FR (e. g. ATH or Exolit AP 422) might be necessary to add into the laminates. To develop its effect, the intumescent gelcoat should be applied at a thickness of 0.5 - 1 mm.
Achievable Fire standards:
When suitably formulated, the Exolit AP 750 can help to pass many fire standards for fire & smoke requirements.
Non-exhaustive list of achievable standards:
DIN 4102 - Germany
NF P 92501 - France
BS 476 - UK
EN 13823 (SBI) - Europe
ASTM E-84 - US
ASTM E-119 - US
ASTM E-162 - US
FMVSS 302 (ISO 3795) - Automotive
TS 45545 - Trains EU
DIN 5510 - Trains DE
NF F 16101 & 16102: M&F class - Trains FR
BS 6853 - Trains UK
FAR 25.853 - Aircraft US
ABD 031 - Aircraft EU
ASTM E-662 (NBS Smoke Box)
UL 94 V-0 (5V)
BS 5852 (crib 5) - UK & Ireland
EN 1021 part 1/ part 2 - EU cigarette & match test
California TB 117 - California Furniture
California TB 603 - California Mattresses
Packaging and HandlingDelivery form
White, free-flowing powder
Exolit AP 750 is supplied in bags with 20 kg net weight / 1.000 kg shrink-wrapped pallets.
Exolit AP 750 should be stored at room temperature in a dry place. Partially emptied containers should be carefully resealed after use.
Although Exolit AP 750 is not hygroscopic by itself, it may still absorb some amounts of moisture due to its high surface area. Therefore, we recommend to store – especially opened bags – in a dry place. It is however usually not necessary to pre-dry the product before use.
Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.