Production of polyurethane powder
AssigneeBayer Aktiengesellschaft
InventorsHildegard Schnoring, Bernd Klinksiek
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Abstract
The instant invention is directed to the production of polyurethane or polyurea powder. The process broadly comprises atomizing an isocyanate, polyisocyanate or isocyanate pre-polymer in the liquid state and bringing the atomized particles into contact with a gaseous diamine or polyamine until they are converted to the solid state.
Claims9
An interface polyaddition process for producing polyurethane polyurea in the form of powder, the particles of which may contain other substances enclosed in them, comprising converting a polyisocyanate into small particles in the liquid state, bringing the particles into contact with a gaseous diamine or polyamine until they have been converted into the solid state by polyisocyanate-polyaddition, and separating the said product from the gaseous diamine or polyamine.
Dependencies are inferred from the claim text.