Exolit® OP 1260 (TP)
Phosphinate flame retardant system for polyester injection moulding applications

Exolit® OP 1260 (TP)

Phosphinate flame retardant system for polyester injection moulding applications

Edition Date :
October 15, 2020
Flame Retardant for Polyester Exolit OP 1260 (TP) 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. Exolit OP 1260 (TP) is based on commercially available chemical substances registered in inventories worldwide.

For more details see our Innovation Spotlight video.

  • Achieves its flame retardant effect through a combined gas phase and condensed phase mode of action
  • UL 94 V-0 rating down to 0.4 mm thickness
  • Developed especially for use in glass fibre reinforced PBT
  • The flame retarded polyester compounds exhibit very good physical and excellent electrical properties
  • Good recyclability
  • Non-halogenated flame retardant with favorable environmental and health profile
Further safety data and handling information are available from our current 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.
Characteristics  Unit   Target Value   DS¹) TD²)  Test Method 
Phosphorus  %(w/w)   19.8 - 20.8  

Photometry after oxidizing dissolution; (11/17) or wavelength dispersive X-ray fluorescence spectrometry; (11/23)  
Water / Moisture  %(w/w)   max. 0.3  

Karl-Fischer titration, e.g DIN 51777, part 1; (11/21)  
Density  g/cm³   approx. 1.41  

at 23 °C  
Bulk Density  g/cm³   400 - 600  

Mass of a given volume at 20°C, e.g. according to ISO 60; (11/34)  
Decomposition Temperature  °C   min. 320  

DTA/TG, 2% weight loss, air  
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.  
Exolit OP 1260 (TP) was developed especially for use in polyester. It is especially suited for both glass-fiber reinforced and non-reinforced PBT. The flame retarded polyester compounds exhibit very good physical and electrical properties.

In glass-fiber reinforced polyester, a dosage of about 18-20 % (by wt.) of Exolit OP 1260 (TP) 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-fibre reinforcement the dosage of the flame retardant may vary.
Before incorporating Exolit OP 1260 (TP), it is important to pre-dry the polyester as usual. If possible, the resulting moisture content should be below 0.1 % (by wt.). Pre-drying of Exolit OP 1260 (TP) is not necessary. However, pre­drying (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 (TP). 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 320 °C.

This information is based on our present state of knowledge and is intended to provide general notes on our products and their uses. It should not therefore be construed as guaranteeing specific properties of the products described or their suitability for a particular application. Any existing industrial property rights must be observed. The quality of our products is guaranteed under our General Conditions of Sale.
Delivery form
White powder

Exolit OP 1260 (TP) is delivered in 20 kg paper bags box with PE inliner or 500 kg big bags.

The product should be stored in 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.
For more details see our Innovation Spotlight video.

Products that offer outstanding sustainability advantages are awarded Clariant’s EcoTain® label. EcoTain® products significantly exceed sustainability market standards, have best-in-class performance and contribute overall to sustainability efforts of the company and our customers. Find out more about: EcoTain®.

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This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application.<br />
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* Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.<br />
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* For sales to customers located within the United States and Canada the following applies in addition: No express or implied warranty is made of the merchantability, suitability, fitness for a particular purpose or otherwise of any product or service.<br />
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