Additive for reducing spotting in automatic dishwashing systems
US10144906B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 7, 2015 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Oct 7, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3917
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A phosphorus-free automatic dishwashing detergent composition comprising: (a) 0.5 to 8 wt % of a first polymer comprising polymerized units of: (i) 60 to 82 wt % (meth)acrylic acid, (ii) 10 to 30 wt % of a monoethylenically unsaturated dicarboxylic acid and (iii) 8 to 25 wt % 2-acrylamido-2-methylpropanesulfonic acid (AMPS); and having Mw from 5,000 to 100,000; (b) 0.5 to 8 wt % of a second polymer comprising polymerized units of: (i) 60 to 95 wt % (meth)acrylic acid, (ii) 5 to 40 wt % 2-acrylamido-2-methylpropanesulfonic acid (AMPS); and having Mw from 5,000 to 100,000; (c) 15 to 50 wt % carbonate, (d) 5 to 50 wt % citrate and (e) 10 to 30 wt % of a bleaching agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.