Encapsulated enzyme in dry bleach composition
US5254287A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1992 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Jan 13, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0039
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a bleaching composition containing an oxidant bleach and enzyme granules, in which enzyme stability is prolonged without undue loss of solubility despite intimate contact of said enzyme granules with said oxidant bleach. In the invention, an oxidant is selected from the group consisting of alkali metal perborates, alkali metal percarbonates, hydrogen peroxide adducts, and mixtures thereof, and combined with an enzyme which is coated substantially completely by a water soluble polymer, in which an additive selected from the group consisting of reducing agents, a transition metal, and mixtures thereof is incorporated to enhance enzyme stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.