BR-S13 is a novel flame retardant, specially developed for thermoplastic polyurethane in different applications, such as TPU film, circuit, and glue. It can be used individually to maintain the transparency of TPU product. When used in combination with MCA, significant FR synergistic effect was shown.

1. Materials

Polyether TPU: BASF S90A

Flame Retardants: Inovia BR-S13, XS MC25

2. Processing

Drying: ionic liquid: 85℃, 4hrs; TPU pallet:100℃, 4hrs

When using BR-S13 individually, please use liquid feeding pump

Extrusion temperature: 195~215℃

Injection temperature: 205~210℃; mold temperature: 60℃

3. Application Example Data

Table 1 Flame Retarding Performance

Table 2 Physical Properties

Note：The test standard is ASTM D 412, speed: 500mm/min. 

Table 3 Processing Flowability

4.Summary

BR-S13 can significantly enhance the MI of TPU. When the MI of the base TPU material is inherently high, the resulting FR TPU tends to exhibit lower tensile strength. Therefore, it is recommended to select a TPU with the same hardness but a lower MI. This approach ensures that both the absolute value and the relative retention rate of tensile properties in the final FR TPU product are optimized. Note: The addition of antioxidants may contribute to improved color stability.  

Polyester TPU Retardant BR-S13-Application example.pdf