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Cool black for hot days?
10 Jul '08
5 min read
In the “BASF House” in Nottingham, UK, inaugurated at the end of January 2008 as a model project showcasing the benefits of modern construction chemicals in a low-energy house, they are incorporated in the coating of the metal roof.
“The low carbon roof is made of lightweight steel with a BASF Coatings AG coating infused with specially selected pigments that have solar heat reflectant properties – creating a colored cool roof,” explains Dr. Mark Gillot, Co-Director of the Institute of Sustainable Energy Technology, and research and project manager for the six research houses with comprise the 'Creative Energy Homes' project on the University of Nottingham campus.
“The coating is applied by the coil coating technique in which flat metal strips are coated and then shaped. By lowering the home's heat absorption through the roof it remains cooler, energy consumption is lower in summer and the lifetime of the roof is extended because of the lower temperature strain,” adds Dr. Gillot.
“But roofs treated with this technique not only protect the occupants of individual houses against the summer heat,” comments Anne Heimes-Scheller, Product Manager for Industrial Coatings at BASF Coatings AG.
“When applied extensively over large areas, our innovative coatings can also counteract the urban heat island effect, the overheating of entire metropolitan areas during the summer.”
The principle of the coating that absorbs less solar radiation is attracting particular interest in Asia, the USA and the Mediterranean region.
This is due both to the warmer climate and the construction techniques that use much less insulating material. While in the past it was mainly high energy-consuming air conditioners that provided tolerable indoor temperatures in these regions, in future these innovative roof coatings will also be counteracting overheating and completely without electricity.
The Prospects:
The demand for NIR-reflecting black pigments for paints and coatings is constantly growing. There are many applications for these “cool paints”, ranging from roofs through facades to metal containers for international shipping traffic to protect their contents against the searing tropical sun.
And their use is not restricted to coatings, because the pigments are also suitable for coloring plastics. As representatives of the organic pigments, the Lumogen Black range of pigments are recommended for use in plastics because of their greater temperature stability.
This opens up many possibilities for plastic paneling, window frames and not least, the entire interior trim of vehicles.
BASF offers its customers a special service in the form of its “CoolSim” computer tool: this simulation program allows BASF experts to work out for each desired color shade which pigment composition is optimal for the intended use in order to obtain the coolest possible surface an enormous advantage for users who then don't have to conduct their own experiments.
“The low carbon roof is made of lightweight steel with a BASF Coatings AG coating infused with specially selected pigments that have solar heat reflectant properties – creating a colored cool roof,” explains Dr. Mark Gillot, Co-Director of the Institute of Sustainable Energy Technology, and research and project manager for the six research houses with comprise the 'Creative Energy Homes' project on the University of Nottingham campus.
“The coating is applied by the coil coating technique in which flat metal strips are coated and then shaped. By lowering the home's heat absorption through the roof it remains cooler, energy consumption is lower in summer and the lifetime of the roof is extended because of the lower temperature strain,” adds Dr. Gillot.
“But roofs treated with this technique not only protect the occupants of individual houses against the summer heat,” comments Anne Heimes-Scheller, Product Manager for Industrial Coatings at BASF Coatings AG.
“When applied extensively over large areas, our innovative coatings can also counteract the urban heat island effect, the overheating of entire metropolitan areas during the summer.”
The principle of the coating that absorbs less solar radiation is attracting particular interest in Asia, the USA and the Mediterranean region.
This is due both to the warmer climate and the construction techniques that use much less insulating material. While in the past it was mainly high energy-consuming air conditioners that provided tolerable indoor temperatures in these regions, in future these innovative roof coatings will also be counteracting overheating and completely without electricity.
The Prospects:
The demand for NIR-reflecting black pigments for paints and coatings is constantly growing. There are many applications for these “cool paints”, ranging from roofs through facades to metal containers for international shipping traffic to protect their contents against the searing tropical sun.
And their use is not restricted to coatings, because the pigments are also suitable for coloring plastics. As representatives of the organic pigments, the Lumogen Black range of pigments are recommended for use in plastics because of their greater temperature stability.
This opens up many possibilities for plastic paneling, window frames and not least, the entire interior trim of vehicles.
BASF offers its customers a special service in the form of its “CoolSim” computer tool: this simulation program allows BASF experts to work out for each desired color shade which pigment composition is optimal for the intended use in order to obtain the coolest possible surface an enormous advantage for users who then don't have to conduct their own experiments.
BASF SE
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