Most Recently Asked Questions

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  1. What is the typical addition level of Incozol EH?
  2. Does Incozol EH contain any metal catalyst?
  3. What are the benefits of Incozol EH over Incozol 4?
  4. Can Incozol EH be used with aromatic isocyanates?
  5. Can I add Incozol EH at the beginning of my manufacture process?
  6. Does Incozol EH give off any volatiles?

What is the typical addition level of Incozol EH?

It is usually recommended that a stoichiometric equivalent (calculated on the % NCO of the PU) is used to maximise the benefits of Incozol EH. This can be calculated using the following equations:

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Does Incozol EH contain any metal catalyst?

No. Incozol EH has been manufactured without the use of metal catalysts, leading to improved in-can stability compared to other bis-oxazolidine latent hardeners (e.g. Incozol 4).

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What are the benefits of Incozol EH over Incozol 4?

The main benefit of Incozol EH over Incozol 4 is the ease of handling. Incozol EH remains liquid below 0ºC whereas Incozol 4 would be solid and require melting before use. The other advantage of Incozol EH is the improved in-can stability as it

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Can Incozol EH be used with aromatic isocyanates?

Although developed with aliphatic PU systems in mind, Incozol EH can be used in aromatic PU systems. In such cases it may be necessary to use weak organic acids, such as oleic or salicylic acid, to catalyse the ring opening hydrolysis of the oxazolid

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Can I add Incozol EH at the beginning of my manufacture process?

In principle, Incozol EH can be incorporated at any stage during manufacture of formulated PU systems. However, in practice it is generally better to incorporate Incozol EH at the end of the manufacture process following a drying process to minimise

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Does Incozol EH give off any volatiles?

Yes. On contact with moisture, the oxazolidine is hydrolysed to liberate 2-ethyl hexanal which is classed as a VOC.

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