Reducing Foam Shrinkage of Polyurethane

What is it about?

This paper present two ways to reduce foam shrinkage.

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Why is it important?

Foam formulation studies were performed to evaluate the correlation of peak temperature foam shrinkage. Two approaches were evaluated to increase peak temperatures: a) preheating of the monomers prior to reaction and b) use of bio-based glycerol as a co-reagent to increase the mixture hydroxyl number and respective maximum temperatures. The results show that as the maximum reaction temperature increases, foam shrinkage decreases.