just another 2 Cents - my formulator chemist says the cyanide in the
LPU part B (iso-cyanides - spelling??) is well bond up and not that
dangerous -- I don't know...

Note that these LPU coatings, especially if you thin and spray - often
don't match the clear air VOC regulations in many parts of the state. If
you use them on a boat, and not on a car or plane, you are very likely
breaking the law. No 'harm' intended - I am just becoming
knowledgeable in the confusing rats nest of VOC regulations that vary
from state to state and often county by county (such as in California).
It is not science or technology that control coatings these days, but
lawyers.

paul oman
progressive epoxy polymers inc

Jim--

I do apologize if I seemed ungrateful for your counsel. I thought you
were just some wise ass. I should have checked things out. I have
just read a lot of your posts and realize that you have made many,
many valuable contributions to this group.

You are absolutely right about the dangers of anything containing
isocyanates. I do not have a supplied-air system but I will probably
be using an HVLP gun which will reduce the overspray and atomozation.
I will be working outside and will be shooting less than one pint. I
will use a tight-fitting mask and the correct cartridge--the same one
I use with muriatic acid which can really burn your lungs up. If I
were younger I would probably not do it without supplied air but at my
age I don't have to worry too much about long-term affects.

Thanks and sorry if I misunderstood your intent.

Joe


On Wed, 18 Apr 2007 19:20:40 -0400, "Jim Conlin"
wrote:



The linear polyurethane (LPU) paints such as Imron, Awlgrip and Perfection
contain cyanide compounds which are VERY TOXIC. These compounds cause brain,
liver and lung damage. When the paints are rolled or brushed, the nasty
stuff stays on the boat and only solvents get into the air. An organic
vapor respirator can deal with that. When the PAINTS are sprayed, an
aerosol of paint droplets, containing the nasty cyanide compounds, is in the
air. The only breathing apparatus which effectively protects the painter
are the 'supplied air' respirators. These start at about $1K. An ordinary
respirator won't do it.. DO NOT SPRAY LPU PAINTS WITHOUT ONE.