PPG Concept safety

[Dave Dolzine]

On the fuel proof aura, if you clear coat with the Concept paint after
putting down the colors in Lusterkote, then you should have a fuel proofed
finish - or is that a bad assumption.  
 
Also,  is it correct to surmise that the spray can paint (Lusterkote) does
not have the nasty isocyanate?  
 
-DD
 

-----Original Message-----
From: Gray E Fowler [mailto:gfowler at raytheon.com]
Sent: Friday, July 25, 2003 10:28 AM
To: discussion at nsrca.org
Subject: Re: PPG Concept safety



Other than solvent....practically inert. Stuff in a can is a solid resin cut
in solvent to make it liquid. Spray it on- solvent evaporates and leaves a
resin film filled with pigments and such. This paint "drys" -the evaporation
of solvent. Concept "drys" then "cures". The curing gives the properties we
desire-paints that dry only really are not fuel proof, just
resistant....including dope. Methanol is not a "good" solvent (like acetone
is) but since this is our fuel it is what we concern ourselves with (and
nitro)....so our single component paints have an aura of fuel proofness to
them. 

hows dat?



Gray Fowler
Principal Chemical Engineer
Composites Engineering 



	"Wayne Galligan" <wgalligan at goodsonacura.com> 
Sent by: discussion-request at nsrca.org 


07/25/2003 09:56 AM 
Please respond to discussion 


        
        To:        <discussion at nsrca.org> 
        cc:         
        Subject:        Re: PPG Concept safety



OK now elaborate on the can sprays like Lusterkote and Century 21 sprays... 
  
Man youse smart.... 
  
WG 
----- Original Message ----- 
From:  <mailto:gfowler at raytheon.com> Gray E Fowler 
To:  <mailto:discussion at nsrca.org> discussion at nsrca.org 
Sent: Friday, July 25, 2003 9:49 AM 
Subject: RE: PPG Concept safety 


Concerning Concept paint.........Here is my 3.5 cents worth.  The OSHA
reference is good but remember this is a workplace regulation which means it
is written as a CYA kinda thing. They assume that if you are using any
chemical then you are being exposed to it for 8 hours a day because that is
your job. Based on that they set limits. In reality a guy painting a toy
airplane at  his house never entered into the realm of OSHA thinking. 
So!.....there are two problems that the average pattern geek need to be
concerned with, Solvent exposure and isocyanate exposure. Dermal exposure
(aka skin for those of you who do not "dig" tech speak) should not be a
concern because you should be outside letting the overspray drift away from
you and onto your neighbors car, or second, if you are inside you better get
a bigger fan. If not you will be sticky and that is the biggest dermal
problem....(imagine if you did this 8 hrs a day! you would be UV resistant
and not require sunscreen at contests-thats a positive way to look at it).
In short...you ain't gonna die...if you do its not my fault. In an overspray
situation the solvents will be nearly gone by the time is hits your skin.
The small amount that of isocyanate on your skin will not cause any
significant problems...but do not get coated with the overspray-change your
situation. 

The real problem is breathing the overspray-isocyanate much worse than
solvent. Solvent inhalation problems take alot of solvent for a long period
of time. (Think about your cousin the glue/paint sniffer and how long he has
managed to survive half intact directly breathing huge concentrations of
solvents). Breathing the solvent from Concept once or twice a year once
again will not kill you. Minimize your exposure and if you have a respirator
use it.  The major breathing problem is the isocyanate. It is nasty and as a
matter of fact so nasty that you and I as pattern geeks are technically not
supposed to even have this paint in our possession. But hey...... we are
relatively smart guys with big egos and we know how to deal with 30% nitro
so this should be no problem .....right? 

The moment isocyanate comes in contact with your body's mucous membranes
(the WET slimy parts of carbon based units) the isocyanate reacts into a
crystalline structure (in your lungs) and it aint coming out any time soon.
Over exposure will give the shortness of breath and flu like symptoms. 
If you have breathing problems or smoke this will be greatly worse. 

Bad news... 

"Dust" masks will not protect you from solvent or isocyanate exposure. 
That respirator you bought last year that has been used twice will not
protect you either-unless you have new cartridges on it. If you paint a
plane every 3 months you had better have new cartridges every time IF you
are breathing the overspray. 
Try not to inhale the overspray....me- I am an expert at holding my breath
while painting. Of course anything that reduces the overspray, or gets it
outta your way is good. 





Gray Fowler
Principal Chemical Engineer
Composites Engineering 



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