Machine dishwashing tablets containing a peracid
US5837663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3945
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A solid detergent composition useful for machine dishwashing is described. The product contains a first layer having a buffering system, a builder and an enzyme. The first layer dissolves to deliver a pH of about 9.0 to about 11 in the wash water. A second layer includes a peracid and an acidity agent in a continuous medium having a melting point in the range of from about 35.degree. C. to about 50.degree. C. The material may be a paraffin wax, a natural wax, a polyvinyl ether, fatty acids and mixtures thereof. The second layer dissolves in wash water to deliver a pH of from about 6.5 to about 9. The release order of the functional ingredients allows for a optimum bleaching of stains as well as removal of soil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.