Speaking of painting...Respirator tips

[bnbsouthwell at bellsouth.net]

Wonder if my wife will figure out were her machine went..:>)
 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of RC Steve Sterling
Sent: Monday, January 17, 2005 7:13 PM
To: discussion at nsrca.org
Subject: RE: Speaking of painting...Respirator tips
 
Hummmm-- an old CPAP machine and a long circuit hose!!!!
-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of John Ferrell
Sent: Monday, January 17, 2005 5:45 PM
To: discussion at nsrca.org
Subject: Re: Speaking of painting...Respirator tips
Remote breathing air devices are not that difficult to construct.
Use a NEW long vacuum cleaner hose plumbed to a respirator mask that
leads into your shop (use a little common sense here...), pressurize the
shop with window fans on the far side of the building and paint outside.
Leaks in the mask & plumbing are OK because everything is going out.
 
 
Explaining why you are doing it that way to family & friends is a lot
harder!
  
John Ferrell    
http://DixieNC.US
----- Original Message ----- 
From: Earl Haury <mailto:ehaury at houston.rr.com>  
To: discussion at nsrca.org 
Sent: Monday, January 17, 2005 7:12 PM
Subject: Re: Speaking of painting...Respirator tips
 
For those not wishing to take risks - do a web search for the Axis
Hobbyair forced air systems, available from several sources. They're
affordable, comfortable, and durable.
 
Earl
----- Original Message ----- 
From: MKMSG at aol.com 
To: discussion at nsrca.org 
Sent: Monday, January 17, 2005 5:34 PM
Subject: Re: Speaking of painting...Respirator tips
 
The following is an extract of an OSHA study done at a Denver automotive
paint shop where urethane containing polyisocyanates is sprayed daily.
The study concluded the workers were protected at an adequate level
(they wore protective suits and were using a forced air breathing
system).  I'm not advocating not using automotive polyurethanes, but if
you're going to use them, be aware of the dangers and take the
precautions recommended by the paint manufacturers. I used to spray
Imron with great results, but am now experimenting with other paints to
eliminate the hazard.
 
Mike Moritko
 
 
OSHA Report Extract:  
 
Probably the most debilitating health effects from workplace exposure to
diisocyanates are respiratory and dermal sensitization. Exposures can
lead to sensitization depending on the type of exposure, the exposure
concentration, the route of exposure, and individual susceptibility.
Dermal sensitization can result in such symptoms as rash, itching,
hives, and swelling of the extremities.18,21 Respiratory sensitization
from exposure to diisocyanates results in the typical symptoms of
asthma. Estimates of the prevalence of diisocyanate-induced asthma in
exposed worker populations vary considerably; from 5% to 10% in
diisocyanate production facilities,22,23 to 25% in polyurethane
production plants,22,24 and 30% in polyurethane seatcover operations.25

A worker suspected of having diisocyanate-induced sensitization will
present with symptoms of traditional acute airway obstruction; e.g.,
coughing, wheezing, shortness of breath, tightness in the chest,
nocturnal awakening, etc.18,20 Upon first exposure to diisocyanates, the
worker may develop an asthmatic reaction immediately or several hours
after exposure, after the first months of exposure, or after several
years of exposure.18,20,23,26,27 some evidence exists which suggests
that the onset of sensitization occurs after a mean exposure interval of
two years.28 After sensitization, any exposure, even to concentrations
below any occupational exposure limit or standard, can produce an
asthmatic response which may be life threatening. This asthmatic
reaction may occur minutes after exposure (immediate), several hours
after exposure (late), or a combination of both immediate and late
components after exposure (dual).20,26 The late asthmatic reaction is
the most common occurring in approximately 40% of
diisocyanate-sensitized workers.29 Recurrent nocturnal asthma has been
described in workers sensitized to TDI and MDI.30,31 An improvement in
symptoms may be observed during periods away from the work environment
(weekends, vacations).18,20,26

The percentage of sensitized workers with persistent symptoms of asthma
after years of no exposure may be 50% or higher. Studies have shown that
workers with persistent asthma have a significantly longer duration of
symptoms prior to diagnosis, larger decrements in pulmonary function,
and a severe degree of nonspecific bronchial hyperactivity at
diagnosis.26 These data suggest that prognosis is improved with early
diagnosis of diisocyanate-induced respiratory sensitization and early
removal from diisocyanate exposure. This emphasizes the need to minimize
workplace exposure concentrations, and for active medical surveillance
of all workers potentially exposed to diisocyanates.
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