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We are contemplating installation of metal roof with a Kynar paint/coating. I am having trouble locating any data on the environmental impact of the materials. Has there been any testing done. I am concerned about Environmental Impact - Off-Gassing, Water Flow and Scratches, etc as it appears that PVDF is pretty toxic. Can you help?
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Nick,
Not sure where you heard that, but here is a little information that might help.
Check out:
http://www.novelis-painted.com/environment/coil_coating_ecologically/pre_painting_eng/index_eng.html
(copy and paste into the browser)
A quote taken from there says:
PVdF-lacquers mainly consist of:
- a Fluor-polymer
- an acrylic type
- pigments
- catalysers
- additives
The Fluor-polymer is, after being washed down from a roof by weathering, not soluble in water. As a consequence no contamination of the ground water takes place. The PVdF-particles remain in the ground and are environmentally neutral.
The acrylic can be dissolved from the PVdF-surface by UV-penetration and destroyed by UV-radiation. It is not known that these particles are intolerable by the environment.
In general the pigments in the lacquer are absolutely harmless, they are even suitable for food. Harmful pigments are being avoided and not used at all. The use of lead-chromate for yellow colours, for example, is state of todays technology.
I reccomend that you take a look at the entire document as it has some great insights. While it is talking about aluminum, the effects of PVDF on steel and other metals would be similar.
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Thanks...I had questions after reading the PPG MSDS and was wondering if there is any data. The information you provided certainly gets me started. Do you know of anything further?
10/22/2008
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10/24/2008
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