Hi everyone,
I am new in this field. I was wondering if anyone can give me an example of the detailed composition of the foam? e.g. what is used as blowing agent and catalyst? Thank you. any tips or suggestions will be appreciated.
nuaa
question on polyurethane foams
Aug 28, 2003
3 Replies
Polyisocyanates react with water to release CO2 which functions as blowing agent. Amine formed reacts with other isocyanate to form a urea link in polymer. I'm sure a Google search will give you details and chemical structures. Frank
Polyisocyanates react with water to release CO2 which functions as blowing agent. Amine formed reacts with other isocyanate to form a urea link in polymer. I'm sure a Google search will give you details and chemical structures. Frank
-In addition, some compounders will add "blowing agents" such as a hydrocarbon like pentane. When the mixed product exotherms, it turns the blowing agent to a gas and this augments the water blowing earlier described.-Jitney
A simple Google search using: isocyante blowing agent chemistry gave this as first hit:
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you want a detailed chemical picture you should emphasise chemistry. Frank
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