Process for a polyurethane foam containing fragrance
AssigneeTenneco Chemicals, Inc.
InventorsHerman Stone, Peter D. Pauly
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Abstract
Fragrance-emitting articles comprising a polyurethane foam containing a particulate filler and a fragrance material, and a method of making such articles, are disclosed. The method includes the essential steps of pre-mixing particulate filler and fragrance and dispersing the pre-mix in a liquid polyol, before adding the other reaction mixture components, and provides a polyurethane foam having a controlled rate of release of the fragrance.
Claims26
A process for the manufacture of a polyurethane foam containing a particulate filler and a fragrance which comprises the steps of mixing at least one particulate filler with at least one fragrance material to form a first mixture, mixing said first mixture with at least one liquid polyol to form a second mixture, and then mixing said second mixture with at least one organic polyisocyanate, water, and at least one catalyst whereby a polyurethane foam capable of releasing fragrance at a controlled and steady rate is produced.
Dependencies are inferred from the claim text.