Exolit™ OP 1242
Exolit OP 1242 is a non-halogenated flame retardant based on organic phosphinates. The product achieves its flame-retardant effect through a combined gas phase and condensed phase mode of action. The thermoplastic polymer with Exolit OP 1242 forms on exposure to flame a stable char at the surface acting as a barrier. The protective layer provides a heat-insulating effect, reduces oxygen access and prevents dripping of molten polymer. Exolit OP 1242 is a white powder.
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Product Information
· Suited for applications in hot and humid environments due to improved hydrolytic stability
· UL 94 V-0 rating down to 0.4 mm thickness
· Suitable for glass fiber reinforced and unfilled thermoplastic polyesters
· Good colorability
· The flame retarded polyester compounds exhibit good physical and electrical properties
· Versatile use with nitrogen synergists like melamine cyanurate;
(melamine polyphosphate as synergist is not recommended due to negative impact on hydrolytic stability)
For regulatory details such as the classification and labelling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet. For disposal in accordance with the regulations the product should be treated as special waste and taken to a suitable incineration plant.
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Please contact us for safety and regulatory details or the Material Safety Data Sheet (MSDS).
|
Characteristics |
Unit |
Target Value |
DS¹) |
TD²) |
Test Method |
|
Appearance |
|
white powder |
☑ |
☐ |
Visual Evaluation |
|
Phosphorus |
%(w/w) |
21.5 -23.8 |
☑ |
☐ |
Photometry after oxidizing dissolution; (11/17) or wavelength dispersive X-ray fluorescence spectrometry; (11/23) |
|
Water / Moisture |
%(w/w) |
max. 0.5 |
☑ |
☐ |
Karl-Fischer titration; (11/21) |
|
Density |
g/cm³ |
approx. 1.3 |
☐ |
☑ |
at 20°C |
|
Bulk Density |
g/L |
approx. 570 +/-50 |
☐ |
☑ |
(DIN 53466) |
|
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. |
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Exolit OP 1242 was developed especially for the use in thermoplastic polyester resins for hydrolytically stable applications. It is suited for both glass fiber reinforced and unfilled PBT and PET grades. The flame retarded polyester compounds exhibit good physical and electrical properties.
In PBT, a dosage of about 20 % (by wt.) Exolit OP 1242 is usually sufficient to obtain the UL 94 V-0 classification for electrical components (at 1.6 as well as 0.8 mm and 0.4 mm thickness). In PET, UL 94 V-0 could be passed at a loading of approx. 15% (by wt.). Subject to the polymer grade, processing conditions and glass fiber reinforcement the dosage of the flame retardant may vary. Melamine cyanurate can be used as flame retardant synergist. We do not recommend using melamine polyphosphate as synergist, because it diminishes hydrolytic stability of the compounds.
Before incorporating Exolit OP 1242, it is important to pre-dry the polyester resin as usual. If possible, the resulting moisture content should be below 0.04 % (by wt.) for PBT and below 0.02 % (by wt.) for PET. Pre-drying of Exolit OP 1242 is not necessary. However, pre-drying (e.g. 4 h at 120 °C) is recommended, if even very low moisture contents must be avoided.
The mixing and processing methods customary in powder processing of polymers can be used with Exolit OP 1242. The VDI Guideline 2263 “Prevention of dust fires and dust explosions” or the relevant national regulations must be observed.
The optimum conditions for incorporating should be determined in each individual case. Care must be taken to ensure homogeneous dispersion of all components. The temperature of the polymer melt should not exceed 340 °C.
Delivery form
White powder
Packaging
Exolit OP 1242 is delivered in 20 kg paper bags with PE inliner or 500 kg big bags.
Storage
The product should be stored in a dry place at room temperature.
Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.
