HO-R-OH (Polyether polyol) 0=C=N-R’-N=C=O
HO-R-OH (Polyether polyol) + 0=C=N-R’-N=C=O
Type of Chemical Reaction:
-Polyester Polyol (Part A) from Industrial Arts
-Polyfunctional Isocyanate (Part B) from Industrial Arts
-Desmodur and Desmophen
-600 mL beakers (2)
- glass stirring rods
1. Polyurethane foam is a by- product of the same process that is used to make
petroleum. It is highly flammable.
2. Polyurethane foam ignites easily and burns rapidly. It should be kept away
open flames and sparks.
3. When it burns, polyurethane releases a great amount of heat and toxic
4. Burning polyurethane can cause suffocation in a poorly ventilated area.
5. Polyfunctional isocyanate and polyester polyol should be handled with
6. DO NOT INGEST THE POLYURETHANE FOAM – some foams have
flame retardant additives that can be toxic if ingested. Whether or not
the foam you are working with contains them, it should not be ingested
or even placed in the mouth. (JUST LIKE ANY OTHER
Polyurethane Foam Procedure
(1) Remember that polyurethane is flammable and should not be
(2) Wear gloves when handling the chemicals.
(3) Place approximately 20mL of each chemical, the polyester
polyfunctional isocyanate, into a large cup.
(4) Observe the viscosity and volumes of each chemical. Record
(5) Add food coloring to create colored foam.
(6) With a stirring rod, mix the contents thoroughly.
(7) Feel the cup for temperature change. Record your
(8) When the foam begins to expand, stop stirring.
(9) Observe the color, texture, temperature and volume of the
foam once the
reaction stops. Record your observations.
Michael, Anthony, and Steven
Anthony typed it, and Michael and Steven
looked up the information on the