Exolit™ OP 1260
Exolit OP 1260 is a non-halogenated flame retardant based on organic phosphinates and synergists. The product achieves its flame-retardant effect through a combined gas phase and condensed phase mode of action. The thermoplastic polymer with Exolit OP 1260 forms on exposure to flame a stable char at the surface acting as a barrier. The protective layer provides an heat-insulating effect, reduces oxygen access and prevents dripping of molten polymer. Exolit OP 1260 is a white powder.
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Product Information
- Suitable for glass fiber reinforced and unfilled thermoplastic polyesters
- UL 94 V-0 rating down to 0.4 mm thickness
- Good colorability
- The flame retarded polyester compounds exhibit very good physical and electrical properties
- Very effective non-halogenated flame retardant without PTFE
Hazards
The product does not require a hazard warning label according CLP regulation (Regulation (EC) No. 1272/2008, as amended).
For further information please refer to the Material Safety Data Sheet.
| Characteristics | Unit | Target Value | DS¹) | TD²) | Test Method |
| Appearance | white powder |
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Visual | |
| Phosphorus | %(w/w) | 19.6 - 21.6 |
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Photometry after oxidizing dissolution; (11/17) or wavelength dispersive X-ray fluorescence spectrometry; (11/23) |
| Water / Moisture | %(w/w) | max. 0.3 |
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Karl-Fischer titration, e.g DIN 51777, part 1; (11/21) |
| Density | g/cm³ | approx. 1.41 |
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at 23 °C |
| Bulk Density | g/cm³ | 400 - 600 |
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| 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. |
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Exolit OP 1260 was developed especially for the use in thermoplastic polyester resins. It is suited for both glass fiber reinforced and unfilled PBT and PET grades. The flame retarded polyester compounds exhibit very good physical and electrical properties.
In PBT, a dosage of about 18-20 % (by wt.) Exolit OP 1260 is usually sufficient to obtain the UL 94 V-0 classification for electrical components (at 1.6 mm as well as 0.8 mm and 0.4 mm thickness). Subject to the polymer grade, processing conditions and glass fiber reinforcement, the dosage of the flame retardant may vary.
Before incorporating Exolit OP 1260, 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 1260 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 1260. 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 300 °C.
Delivery form
White powder
Packaging
Exolit OP 1260 is delivered in 20 kg paper bags with PE inliner or 500 kg big bags.
Storage
The product should be stored at a dry place at room temperature. Opened containers should be tightly resealed after use.
Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions.
