Wet shaving system including a mineral oil coated shaving aid

Abstract

A wet shaving system is disclosed including a blade member and a skin-engaging portion in proximity to said blade member, the skin-engaging portion comprising a solid polymeric shaving aid composite including an exposed portion containing a water-soluble shaving aid dispersed in a water-insoluble polymeric matrix, the water soluble shaving aid being coated with mineral oil.

1 . A wet shaving system comprising a blade member and a skin-engaging portion in proximity to said blade member, the skin-engaging portion comprising a solid polymeric shaving aid composite including an exposed portion containing a water soluble shaving aid dispersed in a water-insoluble polymeric matrix, at least a portion of the water soluble shaving aid being coated with mineral oil. 
   
   
       2 . The wet shaving system of  claim 1  wherein the blade member and skin-engaging portion are mounted on a housing of a razor cartridge. 
   
   
       3 . The wet shaving system of  claim 1  wherein the skin-engaging portion comprises an elongated strip. 
   
   
       4 . The wet shaving system of  claim 1  wherein the mineral oil is present in a concentration of about 2% to about 6% based on the total weight of the water soluble shaving aid. 
   
   
       5 . The wet shaving system of  claim 1  wherein the shaving aid composite is formed from a composition comprising (a) about 20 to about 35% by weight of the water-insoluble polymer, (b) about 40% to about 75%, by weight of a lubricous water soluble polymer, and (c) about 2% to about 6% of the mineral oil, the concentration of mineral oil being based on the total weight of the water-soluble shaving aid and the concentrations of the two polymers being based on the total weight of the composition. 
   
   
       6 . The wet shaving system of  claim 1  wherein the mineral oil is present in a concentration, based on the total weight of the composition, of about 0.1% to about 1.5%. 
   
   
       7 . The wet shaving system of  claim 1  wherein the shaving aid composite includes a base layer and a surface layer, the surface layer having a relatively higher concentration of mineral oil than the base layer. 
   
   
       8 . The wet shaving system of  claim 1  wherein the water-soluble shaving aid is spray coated with mineral oil. 
   
   
       9 . A method of manufacturing a shaving aid composite comprising:
 coating a water-soluble shaving aid with mineral oil;   mixing the water-soluble shaving aid with a water-insoluble polymer; and   forming the mixture into a solid shaving aid composite shaped to be retained by a receiving portion of a razor cartridge.   
   
   
       10 . The method of  claim 9  wherein the forming step comprises extrusion. 
   
   
       11 . The method of  claim 9  wherein the forming step comprises injection molding. 
   
   
       12 . The method of  claim 9  wherein the forming step comprises forming a base layer having a first composition and a surface layer having a second composition. 
   
   
       13 . The method of  claim 12  wherein the second composition has a relatively higher concentration of mineral oil than the second composition. 
   
   
       14 . The method of  claim 12  wherein the base layer and surface layer have different colors. 
   
   
       15 . The wet shaving system of  claim 1  wherein the mineral oil is present in a concentration of about 4% to about 6% based on the total weight of the water soluble shaving aid. 
   
   
       16 . The wet shaving system of  claim 1  wherein the mineral oil is present in a concentration, based on the total weight of the composition, of about 0.1% to about 1.5%. 
   
   
       17 . The wet shaving system of  claim 1  wherein the shaving aid composite includes a base layer and a surface layer, the surface layer having a relatively higher concentration of mineral oil than the base layer. 
   
   
       18 . A shaving aid composite comprising:
 a water-insoluble polymeric matrix; and   dispersed within the water-insoluble polymeric matrix, a water soluble shaving aid, the water soluble shaving aid comprising a water-soluble polymer, at least a portion of the water-soluble polymer being coated with mineral oil.   
   
   
       19 . The shaving aid composite of  claim 18  wherein the mineral oil is present in a concentration of about 2% to about 6% based on the total weight of the water soluble shaving aid. 
   
   
       20 . The shaving aid composite of  claim 18  wherein the water-soluble shaving aid is spray coated with mineral oil.