Roland,
I stand corrected, thanks. I checked the MSDS sheets for DP40 and DP40LF
(the catalyst) and didn't see any isocyanates. PPG recommends a cartridge
respirator with fresh filters for application or an air supplied
respirator.
On Thu, Jul 31, 2014 at 1:36 PM, David Porter <frogeye@porterscustom.com>
wrote:
> Typically the isocyanates are in the hardener not the base substrate..
> dave
> On 7/31/2014 10:46 AM, sentenac.rw@gmail.com wrote:
>
>> On Thu, 31 Jul 2014 09:30:20 -0400, you wrote:
>>
>> I just checked again to be sure. PPG epoxy primers do not have
>> isocyanates. Other PPG primers DO but not the epoxy primers. I have
>> used PPG epoxy primers over ten years, both the older DP40 and the
>> newer stuff. Both are good base coats next to bare metal, and can be
>> a seal coat over the (sanded) filling primers. Old PPG primers like
>> Kondar are just thinned with laquer thinner and no hardener. But the
>> new primer-surfacer stuff is hardened with isocyanates.
>>
>> The only thing about PPG epoxy primer is that if you don't cover it
>> with other primer or top coat within something like a week you have to
>> sand and recoat the epoxy before you cover it. But for amateur
>> restorers having a very rust resistant coating on metal is worth the
>> hassle when it comes time months later to finish the painting job.
>>
>> -Roland
>>
>> On Thu, 31 Jul 2014 09:30:20 -0400, you wrote:
>>
>> The PPG DP primers are great, but they don't come without risk for the
>>> do-it-yourselfer. Like other epoxy paints, they contain isocyanates,
>>> which
>>> are poisonous. A normal face respirator isn't sufficient protection and
>>> they have a cumulative effect that can actually coat the inside of your
>>> lungs. I've known a few painters who've had to quit the profession as
>>> they've been told further exposure would kill them. The manufactures
>>> recommend a full face fresh air supplied respirator as well as full body
>>> protection for application. Google "*Questions and Answers About the
>>> Safe
>>> Use* of.
>>> *Isocyanates" to go to the PPG fact sheet. *
>>>
>>
>>
>>
> --
_______________________________________________
Archive: http://www.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
|