Polyester-based Thermoplastic Polyurethane

Product Description:
IROSTIC® S 7730 is a polyester-based, linear, aromatic Thermoplastic Polyurethane (TPU) for solvent-based adhesives. Key features are fast crystallization rate, good heat resistance, excellent green strength, short open time, good solubility in many solvents including Methyl Ethyl Ketone (MEK), Acetone, MEK/Toluene (8:2) and MEK/Ethyl Acetate (1:1).
Do-it-yourself adhesive, footwear, automotive industry and textile industry.


30.11.21 FW published 18.11.21FW created TDS
Properties Key NORM Value Unit
Solution viscosity range - 05 V1 Huntsman 400 - 600 mPa*s
Solution viscosity range - 12 V1 Huntsman 1000 - 1400 mPa*s
Solution viscosity range - 14 V1 Huntsman 1200 - 1600 mPa*s
Solution viscosity range - 16 V1 Huntsman 1400 - 1800 mPa*s
Solution viscosity range - 19 V1 Huntsman 1700 - 2100 mPa*s
Solution viscosity range - 22 V1 Huntsman 2000 - 2400 mPa*s
Solution viscosity range - 25 V1 Huntsman 2200 - 2800 mPa*s
Density ISO 1183-1 1,20 g/cm³
Minimum activation temperature Huntsman 70 - 75 °C
Type of use 1 or 2 component
  • V1 = viscosity (Brookfield RVT) at 20°C for 15% solid in MEK.


Processing Parameters

This IROSTIC grade can be used as a 2-component system in combination with our IRODUR product range.

Clean and dry parts to be bonded.

If possible, roughen the two surfaces using abrasive material.

Apply a thin layer of adhesive solution.

Dry surfaces for approx. 30 min to allow solvent evaporation.

Activate both surfaces by warming up to 70 - 75°C.

Press surfaces together for 30 seconds.

The bonding is stable after approx. 1 minute.

Full bonding strength will be reached after 24 hours.

Please note that the procedure described here is for the adhesive solution prepared with the IROSTIC.

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