Process of making a flexible polyurethane slab stock foam...

Details Process of making a flexible polyurethane slab stock foam... Process of making a flexible polyurethane slab stock foam...

C - Chemistry, Metallurgy

08

J

C08J 9/04 (2006.01)

Patent

CA 2189890

More particularly, the invention relates to a polyurethane slab stock foam characterized by (a.) a cell size distribution wherein at least 20 percent of the cells visible in a cross-section of the foam have a diameter of at least 0.1mm, (b.) a catastrophic fatigue value characterized by (1.) a percent loss in height of no more than 10% and (2.) a percent hardness retained (65 percent IFD deflection) of no less than 50%, and (c.) a substantial absence of cells having a diameter of at least 1mm. The invention further provides a process of making said foam as well as a method of reducing the number of defects in polyurethane foam wherein such defects have an average diameter of at least 1mm.

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