C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
C11D 3/395 (2006.01) C11D 3/06 (2006.01) C11D 3/386 (2006.01)
Patent
CA 2546759
Automatic dishwashing detergent compositions comprising phosphate builder and metal-containing bleach catalysts, preferably catalysis containing manganese and/or selected cobalt/ammonia catalysts. Preferred compositions comprise cobalt bleach catalyst having the formula: [Co(NH3)n(M)m(B)b]T y, wherein cobalt is in the +3 oxidation state; n is 4 or 5(preferably 5); M is one or more ligands coordinate to the cobalt by one site; m is 0,1 or 2(preferably 1); B is a ligand coordinated to the cobalt by two sites; b is 0 or 1 (preferably 0), and when b=0, then m+n-6, and when b=1, then m=0 and n=4; and T is one or more appropriately selected counteranions present in a number y, where y is an integer to obtain a charge-balanced salt (preferably y is 1 to 3; most preferably 2 when T is a -1 charged anion); and wherein further said catalyst has a base hydrolysis rate constant of less than 0.21M-1 s1 (25°C). Preferred automatic dishwashing compositions further comprise amylase and/or protease enzymes.
Haeggberg Donna Jean
Scheper William Michael
Dimock Stratton Llp
The Procter & Gamble Company
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