Oxazolidines as Latent Curing Agents

Tuesday, February 14, 2012

Moisture Scavengers – For an effective protection again moisture

Moisture is known to be the biggest threat for the failure or loss of performance in coatings and sealants. It has an inherent property to react with isocyanate for the production of gaseous carbon dioxide this in turn exhibits bubbling, pinholing and other issues. There are basically two reasons for the onset of moisture. This moisture contamination can induce either from within the formulation or as result of increased atmospheric humidity. It is globally known that solvents may contain some traces of water which can sometimes lead to the dispersion of urea crystals.

However, the introduction of moisture scavengers has made things easy it is meant to bring down the moisture contamination considerably. They are fast reacting and hydrolyze on exposure to moisture. It also eliminates Co2 bubbles and pinholes in two-component systems and minimizes down glossing and hazing under high humidity application conditions.

Moisture scavengers are heavily used for the removal of water from polyols in two component polyurethanes as well as the removal of water from solvents, plasticisers, and pigment pastes. It prevents gassing and gelling in single component systems. Incorez is a global leader in oxazolidine chemistry, manufacturing a diverse range of products marketed under the Incozol® umbrella.

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