Aromatic and Aliphatic

“Aromatic” Systems
These are polyureas made from the aromatic diisocyanate (e.g. MDI, TDI,..). Their performance is outstanding However, they aren’t very stable under light. This means that the surface alters color in sunlight, however it doesn’t affect its physical properties.

“Aliphatic” Systems
They are polyureas that are based on an diisocyanate that is aliphatic (e.g. IPDI, HDI,…). They’re light-stable, that is, they won’t alter colour in the presence of sunlight (sun or artificial). They can be more challenging to work with and typically cost more than aromatic polyureas.

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UNDERSTANDING POLYUREA

Polyurea coatings offer distinct advantages that differentiate them from other kinds of protective coatings. There are also certain limitations and requirements for the proper application of these coatings. This article will address eight questions to answer in the context of these coatings. Scientifically defined, polyurethane can be described as “composed from organic elements that are joined by carbamate” while polyurea is a ” type of elastomer that comes from the reaction product of an isocyanate constituent and a synthetic blend component via step-growth polymerization.”

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