Patent ID: 8680033

Claim:
An automatic dishwashing detergent composition having less than 0.5 wt % phosphorus and comprising: (a) a polymer comprising polymerized residues of: (i) 50 to 72.5 wt % acrylic acid, (ii) 7.5 to 15 wt % maleic acid and (iii) 10 to 42.5 wt % methacrylic acid; and having M w at least 2,000 and a total amount of maleic acid and methacrylic acid residues comprises at least 26 wt % of the polymer; and (b) carbonate and silicate in a weight ratio from 4:1 to 1:2, respectively, wherein the composition comprises from 10 to 90 wt % total carbonate and silicate.