Composition for the protection of glassware in a dishwashing process

Abstract

The present invention provides a composition. The composition comprises zinc and bismuth. The composition for use in the protection of glassware in an automatic dishwashing process.

1 . A-composition comprising zinc and bismuth for use in the protection of glassware in an automatic dishwashing process.  
   
   
       2 . A composition according to  claim 1 , wherein the mass ratio of zinc to bismuth in the composition is from 1:100 to 100:1.  
   
   
       3 . A composition according to  claim 2 , wherein the mass ratio of zinc to bismuth in the composition (by mass) is from 1:10 to 10:1.  
   
   
       4 . A composition according to  claim 1 , wherein the zinc or bismuth are in metallic form.  
   
   
       5 . A composition according to  claim 4 , wherein the metallic form is an alloy of zinc and bismuth.  
   
   
       6 . A composition according to  claim 1 , wherein the zinc or bismuth are present as a salt or compound.  
   
   
       7 . A composition according to  claim 6 , wherein the salt or compound is a nitrate, oxide, sulphate, phosphate, halide, carbonate or carboxylate salt.  
   
   
       8 . A composition according to  claim 1 , wherein the composition is a detergent formulation.  
   
   
       9 . A composition according to  claim 8 , wherein the bismuth and zinc comprise from 0.002 wt % to 6 wt % (based on the weight of both metals-) of the detergent formulation.  
   
   
       10 . A composition according to  claim 9 , wherein the bismuth and zinc comprise from 0.01 to 3 wt % of the detergent formulation.  
   
   
       11 . A composition according to  claim 1 , wherein the composition is a rinse aid formulation.  
   
   
       12 . A composition according to  claim 11 , wherein the bismuth and zinc comprise from 0.03 wt % to 30 wt based on the weight of both metals of the rinse aid formulation  
   
   
       13 . A composition according to  claim 1 , wherein the composition comprises a soluble ceramic/glass formulation.  
   
   
       14 . A method for the protection of glassware in an automatic dishwashing process comprising: providing a composition comprising zinc and bismuth in the automatic dishwashing process.  
   
   
       15 . The method according to  claim 14 , wherein the amount of zinc and bismuth provided to a dishwasher cycle is from 1 to 1000 mg.  
   
   
       16 . The method according to  claim 15 , wherein the amount of zinc and bismuth provided to a dishwasher cycle is from 5 to 500 mg.  
   
   
       17 . The method according to  claim 16 , wherein 5 to 100 mg zinc and 5 to 100 mg bismuth is provided to a dishwasher cycle.