Chemed Corporation

Dubois Chemicals, Inc.

Denny E Daugherty

Anthony J Bruegge

Terrence J Sabatelli

Edwin R Loder

Gary L Young

Philip M Sabatelli

A method of forming a paste detergent composition includes forming two separate aqueous solutions. The first aqueous solution includes an effective concentration, generally 1 to 70% of potassium tripolyphosphate. The second solution is an aqueous solution of a water soluble sodium based detergent builder preferably sodium hydroxide. These are combined and due to the effective concentrations of the potassium tripolyphosphate and the water soluble detergent builder, the viscosity of the formed detergent substantially increases relative to either of the viscosities of the first or second aqueous solutions. This provides a unique method of forming paste detergent compositions particularly for use in warewashing machines.

Method of making paste detergent and product produced

A high caustic paste dishwashing detergent is formulated to avoid reversion of the polyphosphates. The composition which includes at least about 35% sodium hydroxide (solids) is formulated with up to 30% of a phosphate sequestering system. The phosphate sequestering system includes preferably equal proportions of tetra alkali metal pyrophosphate and alkali metal tripolyphosphate. The high percentage of pyrophosphate is added to further stabilize the phosphate system. The detergent composition also includes a low molecular weight polyacrylic acid, a phosphono alkyl tricarboxylic acid, colloidal silica and a gluconate and optionally a chlorine source and defoamer. Preferably the composition includes at least about 40% sodium hydroxide, 10% tetra sodium pyrophosphate and 10% sodium tripolyphosphate with the remainder formed from the polyacrylate, phosphono butane tricarboxylic acid, sodium gluconate, colloidal silica, Chloramine T and water.

Method of formulating high caustic paste dishwashing compositions made

Dichlorodimethyl hydantoin stabilized for use in alkaline detergent formulations by forming granules or briquettes of a minimum size and hardness.

Stabilized dichlorodimethyl hydantoin

The invention disclosed provides a new improved slurry detergent and to a method of using same. The slurry detergent may be formulated with alkali metal hydroxides and/or silicates, condensed phosphates, sodium hypochlorite and sodium polyacrylate, or the like. The new improved slurry is found to have significant advantages over both liquid detergents and powder detergents in dispensing as well as in use.

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West Chester, OH, United States of America

Denny E Daugherty