Liquid polyurethane on polystyrene foam

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#1

Anybody know if liquid polyurethane expanding foam will stick to polystyrene foam and not dissolve the polystyrene foam?

#2

Thinking to use low density polystyrene in the centre of my core surrounded in pu expanding foam before glassing outside with polyester. I hope to reduce overall weight

#3

Will need to ask my colleague, but I believe these materials do not attack each other. PU foam sticks to about anything.

#4

Bump bump :slight_smile:

I’m planning to use polystyrene core surrounded in liquid polyurethane foam then layup using polyester on top of the polyurethane. I hope this can seal the polystyrene from the polyester which would melt it and also give me a lighter weight foam core

#5

Let me ask that tomorrow. Then I meet my colleague.

#6

Hi Herman,

Did you manage to speak to your colleague? Really appreciate your advice on this :slight_smile:

#7

My colleague told me that EPS withstands the chemical attack of polyurethanes, foaming or not foaming.

With one remark though, as EPS is not very thermally stable. Once the temperature goes over 80C or so, EPS collapses. (but it totally depends on the PU and the amount if that temperature is reached.