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pgmrdan
10-17-2003, 03:43 PM
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[This message has been edited by pgmrdan (edited 03-19-2004).]

Evan
10-17-2003, 03:47 PM
Dan,

All you never wanted to know about isocyanates.

http://www.dhs.cahwnet.gov/ohb/HESIS/iso.htm

pgmrdan
10-17-2003, 03:53 PM
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[This message has been edited by pgmrdan (edited 03-08-2004).]

thistle
10-17-2003, 08:55 PM
even if im brushing it I go through the motions and put on all the kit,respirator,suit, gloves ,ventilation,ect.
dont even mix and thin without all the protective gear either.
dont let unprotected persons walk in on the job.
better safe than dead.

pgmrdan
10-18-2003, 03:32 PM
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[This message has been edited by pgmrdan (edited 11-16-2003).]

Oso
10-18-2003, 11:14 PM
Isocyanates are bad news if "loose".

BUT, in one-component paint, they are fully reacted. The paint is often droplets in suspension in a carrier (with which they do not mix), with another solvent in the paint droplets.
It dries by coalescing as the carrier evaporates and the drops meld together as they lose the last tad of their solvent.

NOT an isocyanate hazard if the dried paint is not.

It is the TWO-component paints than might contain isicyanates more "loose". Even then, most are partially reacted so that they are attached to a polyol but still have cross-linking sites. They are much less bad in that condition.

BTW, the isoyanates generally will react with water to a solid....obviously then, any in a water base paint are fully reacted....and not a hazard.

[This message has been edited by Oso (edited 10-18-2003).]