Printech Archive
Re: VOC content/photochemical reactivity


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From: Brady,Ray (RBrady@fujihuntusa.com)
Date: Thu Feb 17 2000 - 07:53:56 CST


Brian,
Interesting question about the photo-reactivity of straight chain
hydrocarbons. I do not know the experimental data on this. All
hydrocarbons have been considered to be photo-reactive, with the
aromatics being more reactive as regulated by the old California rule 102 and
similar regulations in Ohio and North Carolina. The reactivity is primarily due
to interaction with NOx to form ozone. The formation of tropospheric
ozone is the real bad guy. Most of the aliphatic hydrocarbons used in solvent
blends for printing applications are mixtures of straight and branched
isomers. A good informational site on this is
http://www1.ldc.lu.se/iiiee/emissions/vocs/vocs.html
<http://www1.ldc.lu.se/iiiee/emissions/vocs/vocs.html> . Also see the
links to Photochemical smog attached.

Ray Brady
Technical Director
Solvents and Specialty Products
Anchor / Fuji Hunt


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