Polymer Polyol

Polymer Polyol

In recent years there has been a trend in the foam slabstock market towards foam having improved load bearing characteristics. Such extended load bearing foams can be produced with polymer polyols which are conventional slabstock polyols containing suspended solid particles. These microscopic particles, which give the polyol an opaque white appearance, act as a reinforcing filler increasing the foam hardness. Polyols are available with different amounts of suspended particles: the higher the amount of solids the harder the foam.

Polymer polyols used for the production of enhanced load bearing foams often contain particles of polystyrene or a copolymer of styrene and acrylonitrile. In both cases the polymerization takes place in the base polyol and makes use of a pre-polymer stabilizer which surrounds each particle as it is generated. This prevents particles sticking together and ensures a stable suspension of microscopic particles.

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