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Paint Solids -Reply



There is no single right answer to this question.  It really depends
on what the norm for a particular type of coating or particular end
use is.  For example, there would be a difference in solids content
between a "high solids" automotive production clearcoat (maybe
50-60 weight percent solids) and a "high solids" automotive plastic
part adhesion promoter (perhaps 10-15 weight percent solids
because it needs to be applied at only a few tenths of a mil dry film
thickness).

In some early California (SCAQMD) rules, high solids was defined
as more than 80 percent volume solids.  This was a very high
hurdle.

We (EPA) have often used the term "higher solids coating " to
mean a coating (usually solvent-borne) with more solids than
"conventional" coatings.    It's really just an identifier for lower VOC
content solvent-borne coatings to go along with other types of lower
VOC content coatings such as waterborne, powder, radiation cured
(uv cure and eb cure), etc.



>>> <M0FLEI01@ulkyvm.louisville.edu> 04/19/99 04:48pm >>>
What % by weight would be considered a high solids coating?

Marvin Fleischman, Industrial Assessment Center, Department of
Chemical Engineering, University of Louisville, Louisville, KY
40292, 502/852-6357, FAX:502/852-6355, email:m0flei01@ulkyvm.
louisville.edu