Solid cast detergents containing encapsulated halogen bleaches and methods of preparation and use
US4681914A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | May 8, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0039
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An active-halogen bleach such as dichloroisocyanurate encapsulated in a coating of dihydratea synthetic detergent such as sodium octyl sulfonate. The capsule may further comprise an initial coating of a soluble inorganic detergent builder or filler such as an alkali metal phosphate or sulfate. The capsule is stable in highly alkaline environments such as detergent compositions. Solid cast detergent-bleach composition having minimal bleach degradation comprising an alkaline hydratable chemical such as sodium hydroxide, a hardness sequestrant such as sodium tripolyphosphate, water of hydration and encapsulated active-halogen bleach formed in accordance with this invention. Optionally the detergent-bleach composition may contain a polyelectrolyte such as polyacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.