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Incorez
Incorez Oxazolidines are versatile additives for 1K and 2K solvent borne and high solids polyurethane systems. They can be used as moisture scavengers, latent curing agents or reactive diluents in a variety of applications, with specific benefits for your PU coating formulations.

Stability in 1K aliphatic polyurethane systems

Storage stability in Aliphatic Systems
In 1K aliphatic coating systems Incozol EH is very effective in bringing enhanced performances such as:
  • Storage stability in 1K PU balcony and flooring coating systems
  • Low temperature storage stability - no crystallization effect
Storage stability in 1K PU balcony system

In below graph both oxazolidine latent hardeners, Incozol 4 and Incozol EH were combined with an aliphatic polyether prepolymer without Incozol (control) at 1:1 stoichiometry based on % NCO of the prepolymer (approximately 8.5% w/w).


Oxazolidine in-can stability graph

Both oxazolidines show good in-can stability
Storage stability in 1K PU flooring system

The change in viscosity was measured for unopened containers of PU prepolymer without Incozol (control), then with the addition of Incozol 4 and Incozol EH at a 1:1 stoichiometry based on the total % NCO of the flooring system


Oxazolidine excellent storage stability graph

Oxazolidines demonstrate excellent storage stability even after
storage at 40°C for 56 days.

Low temperature storage stability
Product Seeded (Y/N) Storage Temp. (°C) 1 week 2 weeks 1 month 2 months 4 months 6 months
Incozol 4 Download N -15 CRY CRY CRY CRY CRY CRY
Y CRY CRY CRY CRY CRY CRY
N 20 PC PC CRY CRY CRY CRY
Y PC PC CRY CRY CRY CRY
Incozol EH Download N -15 NC NC NC NC NC NC
Y NC NC NC NC NC NC
N 20 NC NC NC NC NC NC
Y NC NC NC NC NC NC
NC: Not crystallised, PC: Partly crystallised, CRY: Crystallised (solid)

As can be seen in this table, Incozol EH shows excellent storage stability, with no signs of crystallisation even when seeded with a potential nucleation site (to mimic dirt contamination). This is in contrast to isobutyraldehyde based oxazolidines (e.g. Incozol 4), which provide limited storage stability at these temperatures.



Downloadable documents

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Download Latent hardener for 1K aliphatic waterproofing PU coatings Case Study
Download Oxazolidine latent hardeners for 1K PU flooring & balcony systems Case Study
Download 1K waterproofing balcony coatings Case Study

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