Odorant hydrophilic foam compositions
AssigneeW. R. Grace & Co.
InventorLouis L. Wood
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Abstract
This invention relates to hydrophilic, odorant-containing foam compositions having improved release ability of the odorant abetted by incorporating the odorant into a non-volatile, water insoluble oil or wax medium which is added to an aqueous reactant prior to reacting the aqueous reactant with a hydrophilic, isocyanate-terminated prepolymer to form a polyurethane foam.
Claims5
An odorant-containing, urethane foam forming composition comprising
- (a) 25-200 parts of a water reactant;
- (b) 100 parts of a prepolymer comprising at least one isocyanate-capped polyol having a reaction functionality greater than two, the total of said polyol present having an oxyethylene content of at least 40 weight percent before capping;
- (c) 5-100 parts of a non-volatile, water insoluble wax or oil said wax or oil having incorporated therein
- (d) 1-30 parts of a volatile odorant.
A hydrophilic polyurethane foam containing a volatile odorant incorporated in a non-volatile, water insoluble wax or oil formed by reacting 100 parts of a prepolymer comprising at least one isocyanate-capped polyol having a reaction functionality greater than two, the total of said polyol present having an oxyethylene content of at least 40 weight percent before capping, with 25 to 200 parts of a water reactant containing 1 to 30 parts of a volatile odorant incorporated in 5 to 100 parts of a non-volatile, water insoluble wax or oil.
Dependencies are inferred from the claim text.