Rumpty wrote:
Isocyanates _will_ be contained in _all_ polyurethanes including
waterborne,
and will not be contained in any other kind of coating, as by definition
isocyanate-based coatings are polyurethanes
John thanks for the clarification, I'm a ISO freak who has had bad
dealings
with them. That's one reason why I use Hydrocote Resistane as a finish as
it doesn't contain ISO's.
Inhale deeply......
I remember the day that one of my former employers lost one of their minor
but irreplaceable corporate resources--there was a painter on the propeller
blade line who had been with the company over 30 years. He could put a
blade on the balance machine, check the balance, move it to the spray
booth, put a coat of paint on it, and it wouldn't need final balance (which
is intended to adjust for the weight of the paint) afterwards--he could
eyeball it that precisely. After spraying polyurethanes for 15 years or
so, with a good spray booth but no respirator (it was Fortune 500 Aerospace
and they do things like that right or not at all, but the safety folks did
their thing and the numbers said that in that booth he didn't need any kind
of protection), one day his system decided that it wanted to be allergic to
the stuff and he couldn't even come into the factory anymore (building is
about a quarter mile square) without going into anaphylactic shock.
That's the insidious thing about isocyanates--not that they're immediately
toxic but that when your system decides that it's had enough, then you
can't even get _close_ to them. And when that point of sensitization
occurs seems to be random--one guy can spray his whole life without any
protection and never have a problem, another guy can get sensitized the
first time he forgets to wear his air mask.
--
Rumpty
Radial Arm Saw Forum: http://forums.delphiforums.com/woodbutcher/start
- - - - - - - - - - - - - - - - - - - - -
"J. Clarke" wrote in message
...
Rumpty wrote:
I recently purchased a cartridge-style respirator with organic vapor
filters for lung protection. Do I need to be worried about an
explosion from these vapors?
Typically NO, but you do need ventilation and for occasional home use a
window fan used in a window for exhaust will work. IF you are spraying
then you "may" have explosion considerations.
Oh, keep in mind "organic vapor filters " will NOT protect you against
Isocynates which may be contained in some products such as
polyurethane.
Isocyanates _will_ be contained in _all_ polyurethanes including
waterborne,
and will not be contained in any other kind of coating, as by definition
isocyanate-based coatings are polyurethanes.
--
Rumpty
Radial Arm Saw Forum: http://forums.delphiforums.com/woodbutcher/start
- - - - - - - - - - - - - - - - - - - - -
"Mr Fixit eh" wrote in message
oups.com...
So we've sorted out that dust is likely not a risk for combustion in
the home workshop unless you're shaking out your dust collector bags
right beside your furnace/ hot water tank pilot light.
Now for the vapours....I try to keep to the water-based stains,
paints,
etc, but every once in a while resort to an oil-based. If I'm using
an
oil-based, I crank the basement window open (basement shop). I
recently purchased a cartridge-style respirator with organic vapor
filters for lung protection. Do I need to be worried about an
explosion from these vapors? What sort of concentration is required
before the flame will make a big 'poof.'
I was planning to use some contact cement on a project. I had
purchased latex CC, but advice from this forum recommended oil-based
CC. Based on the warnings on the can, I'm thinking maybe this stuff
should stay out of the basement shop.
On a slightly different note.....
I need to attach oak skins to kitchen cabinet sides. How dangerous is
this stuff to use on a main floor kitchen. I would close the basement
door to prevent the vapours sinking to the basement, and set up a fan
with windows open to exhaust the vapours.
Thoughts?
Steve
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)