Plastic cleaning method using dispersant copolymer
US11999925B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2019 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | Apr 28, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/18
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A plastic cleaning method for cleaning a plastic article in an automatic dishwashing machine is provided, comprising: selecting an automatic dishwashing composition for cleaning plastic, wherein the automatic dishwashing composition, comprises: a builder; a phosphonate a nonionic surfactant; and a dispersant polymer comprising: (a) 60 to 98 wt % of structural units of formula I wherein each R1 is independently selected from a hydrogen and a —CH3 group; and (b) 2 to 40 wt % of structural units of formula II wherein each R2 is independently selected from an alkyl group with at least 4 carbon atoms and wherein each R3 is independently selected from a hydrogen and a methyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.