All valid points.
Short chained polymeric polyisocyanates know as PAPI has low monomer levels.
These are used in moisture cured urethane adhesives ( Gor**la Glue , and urethane foam in a can found in most hardware stores.
I would worry more about some aromatic diamines used to cure Toluene Di-isocyanate based urethanes for the higher temp uses.
Aromatic diamine such as MOCA - methylene bis chloro-aniline- which hepato-toxin, rapid skin penetration and tissue absorption, and has been considered a liver carcinogen.
These compound were melt blended so minimum solvents were used as such.
Aliphatic dianhydrides are used to cure methylene bis- di-isocyantes.
Many soft foam prothesis used in skin contact medical applications such used in mastectomy survivors cosmetic reconstruction are MDI/polyol/ water.
Your memory foam is one of those.
Use anhydrous isopropanol, or anhydrous MIBK or acetone if you can.
or you could,....
If this is only a small scale proof of concept evaluation then place the coupons inside a metal mesh cage just like Sir Humphrey Davy's Lamp for the coal mines and put it into a high flow oven.
Ted.
