Gels comprising a hydrophobic material

Abstract

The gel compositions as described herein, are less affected by changes in humidity, are readily formed into complex shapes, and can contain high loadings of the hydrophobic material, even when the material is not highly hydrophobic, and provide a more controlled release of the hydrophobic material.

What is claimed is: 
     
         1 . A chemically cross-linked gel composition, comprising a hydrophobic material, wherein the gel is a chemically cross-linked polyol or derivative thereof, wherein the polyol or derivative thereof is selected from the group consisting of: polyol, polyester polyol, polyglycerol and mixtures thereof. 
     
     
         2 . The gel composition according to  claim 1 , wherein the polyol derivative is a polyester polyol. 
     
     
         3 . The gel composition according to  claim 2 , wherein the polyol derivative is castor oil. 
     
     
         4 . The gel composition according to  claim 2 , wherein the polyester polyol is cross-linked using a cross-linking agent selected from the group consisting of: isocyanates, isothiocynates and mixtures thereof. 
     
     
         5 . The gel composition according to  claim 4 , wherein the cross-linking agent is selected from the group consisting of: 1,6 hexamethylene diisocyanate (HMDI), L-Lysine ethyl ester diisocyanate (LDI), Poly (pentamethylene diisocyanate) and mixtures thereof. 
     
     
         6 . The gel composition according to  claim 4 , wherein the gel is formed using a molar ratio of polyester polyol to cross-linking agent of from about 1:0.75 to about 1:2. 
     
     
         7 . The gel composition according to  claim 6 , wherein the gel is formed using a molar ratio of polyester polyol to cross-linking agent of from about 1:0.8 to about 1:2. 
     
     
         8 . The gel composition according to  claim 1 , wherein the hydrophobic material is a perfume, preferably present at a level of from about 3 wt % to about 85 wt % of the gel composition. 
     
     
         9 . The gel composition according to  claim 8 , wherein the hydrophobic material is a perfume, preferably present at a level of from about 15 wt % to about 75 wt % of the gel composition. 
     
     
         10 . The gel composition according to  claim 1 , wherein the hydrophobic material is a perfume or perfume mixture, and has a log P of greater than about 0.01. 
     
     
         11 . The gel composition according to  claim 1 , wherein the hydrophobic material is a perfume or perfume mixture, and has a log P of from about 0.5 to about 5.5. 
     
     
         12 . The gel composition according to  claim 8 , wherein the hydrophobic material is a perfume or perfume mixture, and has a log P of greater than about 3.0. 
     
     
         13 . The gel composition according to  claim 12 , wherein the perfume or perfume mixture has a log P of from about 3.5 to 5.5. 
     
     
         14 . The gel composition according to  claim 8 , wherein the hydrophobic material is a perfume or perfume mixture, and has a log P of less than about 3. 
     
     
         15 . A multilayer composition comprising a first layer which is a gel composition according to  claim 1 , and a second layer. 
     
     
         16 . The multilayer gel composition according to  claim 15 , wherein the second layer is an adhesive layer. 
     
     
         17 . The multilayer gel composition according to  claim 16 , wherein the first layer and second layer comprise cross-linked polyol or derivative thereof. 
     
     
         18 . The multilayer gel composition according to  claim 17 , wherein the gel of the first layer is formed using a molar ratio of polyol or derivative thereof to cross-linking agent of from about 1:0.75 to about 1:2, and the gel of the second layer is formed using a molar ratio of polyol or derivative thereof to cross-linking agent of from about 1:0.05 to about 1:0.7. 
     
     
         19 . The gel composition according to  claim 1 , wherein the gel composition further comprises a hydroxyl containing polymer, a hydroxyl containing oligomer or mixtures thereof. 
     
     
         20 . The gel composition according to  claim 1 , wherein the gel composition has a surface area of less than about 150 cm2.