Solid alkaline foaming cleaning compositions with encapsulated bleaches

Abstract

The present invention relates to a solid alkaline cleaning composition including encapsulated bleach and suitable for cleaning under conditions in which a high foaming cleaner is desirable.

We claim:  
     
         1 . A solid alkaline cleaning composition comprising: 
 about 20 to about 70 wt-% source of alkalinity;    about 5 to about 60 wt-% sequestrant;    about 1 to about 50 wt-% foaming surfactant blend; and    about 10 to about 70 wt-% of an encapsulated bleach    
     
     
         2 . The composition of  claim 1 , having a form of powder, flake, granule, pellet, tablet, lozenge, puck, briquette, brick, solid block, or unit dose.  
     
     
         3 . The composition of  claim 1 , wherein the foaming surfactant blend comprises nonionic and anionic surfactant.  
     
     
         4 . The composition of  claim 3 , wherein the foaming surfactant blend comprises amine oxide, sulfate, and sulfonate surfactants.  
     
     
         5 . The composition of  claim 4 , wherein the foaming surfactant blend comprises 0.5-3 parts amine oxide surfactant, 1-6 parts sulfate surfactant, and 1-6 parts sulfonate surfactant.  
     
     
         6 . The composition of  claim 5 , wherein the foaming surfactant blend comprises 0.6 parts amine oxide surfactant, 4 parts sulfate surfactant, and 4 parts sulfonate surfactant.  
     
     
         7 . The composition of  claim 3 , wherein the foaming surfactant blend comprises 1 part nonionic and 2-20 parts anionic surfactant.  
     
     
         8 . The composition of  claim 5 , further comprising 0.5-2 parts alkylcarboxylate surfactant.  
     
     
         9 . The composition of  claim 8 , comprising 1 part alkylcarboxylate surfactant.  
     
     
         10 . The composition of  claim 4 , further comprising alkylcarboxylate.  
     
     
         11 . The composition of  claim 1 , wherein the source of alkalinity comprises sodium hydroxide, potassium hydroxide, alkali metal borate, alkali metal silicate, alkali metal carbonate, amine, or mixture thereof.  
     
     
         12 . The composition of  claim 1 , wherein the sequestrant comprises a polyacrylate, a phosphinopolycarboxylate, a tripolyphosphate, or a combination thereof.  
     
     
         13 . The composition of  claim 1 , wherein the encapsulated bleach comprises core of active chlorine material and outer layer of solid surfactant.  
     
     
         14 . The composition of  claim 13 , wherein the encapsulated bleach further comprises inner coating, which comprises inorganic material.  
     
     
         15 . The composition of  claim 1 , further comprising about 1 to about 20 wt-% water.