Gaining a high degree in formulation flexibility for anticorrosives
Friday, 19 August 2011
Novel amine-functional dimer technology allowing new chemistry for anti-corrosive coatings
Epoxy based coatings are a widespread technology being used for demanding applications with a long lasting lifetime requirement (wind turbine blades, storage tanks, marine and off shore applications). Epoxy coatings need (amine) hardeners to crosslink and retrieve their excellent chemical and weathering resistance. Conventional amine hardeners in many cases cause formulation or film properties issues: low molecular weight amines are low viscous yet volatile, while high molecular weight amines/amides are often highly viscous. For good chemical resistance, films need to be cured with a high cross-link density but they tend to become brittle. AT the European Coatings Conference Eric Brouwer from Croda Industrial Specialties will show their development of a new type of amine functional hardener, based on its own biobased dimer fatty acid technology. Dimer diamines of this range are hydrophobic and apolar, giving excellent barrier properties to the coating and yet provide good flexibility and impact resistance. Another big advantage of our hardener is its low viscosity allowing for high solids- and even solventfree formulations. This new technology will allow formulators a high degree in formulation flexibility as it can be used on its own or as a co-hardener, and will bring true sustainable coatings a big step closer.