Additive for reducing spotting in automatic dishwashing systems
A phosphorus-free automatic dishwashing detergent composition comprising: (a) 0.5 to 10 wt % of a polymer comprising polymerized units of: (i) 65 to 75 wt % (meth)acrylic acid, (ii) 15 to 25 wt % of a monoethylenically unsaturated dicarboxylic acid and (iii) 7 to 13 wt % 2-acrylamido-2-methylpropanesulfonic acid (AMPS); and having M w from 5,000 to 100,000; (b) 15 to 50 wt % carbonate, (c) 0 to 50 wt % citrate and (d) 10 to 40 wt % of a bleaching agent.
1. A phosphorus-free automatic dishwashing detergent composition comprising:
(a) 2 to 8 wt % of a polymer comprising polymerized units of:
(i) 69 to 71 wt % of acrylic acid,
(ii) 19 to 21 wt % of maleic acid; and
(iii) 9 to 11.5 wt % of 2-acrylamido-2-methylpropanesulfonic acid; and having M w from 12,000 to 25,000;
(b) 15 to 50 wt % carbonate,
(c) 0 to 50 wt % citrate and
(d) 10 to 40 wt % of a bleaching agent,
wherein the composition contains less than 0.1 wt % phosphorus.
2. The composition of claim 1 in which the composition comprises from 20 to 45 wt % carbonate.
3. The composition of claim 2 in which the composition comprises from 20 to 40 wt % citrate.
4. The composition of claim 1 , wherein the polymer comprises polymerized units of:
(i) 70 wt % of acrylic acid;
(ii) 20 wt % of maleic acid; and
(iii) 10 wt % of 2-acrylamido-2-methylpropanesulfonic acid.