Question 1

What is a water isocyanate reaction calculator?

Accepted Answer

A water isocyanate reaction calculator estimates carbon dioxide generation, gas volume, NCO consumption and extra isocyanate demand from the water-isocyanate reaction in polyurethane foam.

Question 2

How much CO₂ is generated from water in polyurethane foam?

Accepted Answer

One mole of water generates one mole of CO₂ during the polyurethane water-isocyanate reaction. The calculator converts water pphp into CO₂ mass and theoretical gas volume.

Question 3

How many NCO equivalents does water consume?

Accepted Answer

Each mole of water consumes two NCO equivalents. This is why water must be included when calculating isocyanate requirement and NCO index.

Question 4

Can this calculator be used for TDI and MDI systems?

Accepted Answer

Yes. Enter the correct %NCO for TDI, MDI, polymeric MDI or prepolymer to estimate the extra isocyanate mass consumed by water.

Question 5

Is theoretical CO₂ volume the same as final foam volume?

Accepted Answer

No. The calculated CO₂ volume is theoretical ideal-gas volume. Final foam volume depends on cell opening, gas loss, mold restriction, physical blowing agents and processing conditions.

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