Bleaching granules
AssigneeAkzo N.V.
InventorsJan J. H. Ploumen, Herman J. Edelijn, Jan J. M. Reijnen
Life of this patent
Estimating the term…
Abstract
The invention relates to bleaching granules containing a solid, water-insoluble peroxy acid and a hydratable inorganic material. The bleaching granules are made by a process wherein the constituents to be used are mixed to form a powder at low temperature and granules are formed from the powder as the temperature is increased to at least the hydration temperature of the hydratable inorganic material. The invention also relates to bleaching compositions and detergent compositions comprised of such bleaching granules.
Claims9
Solid, free-flowing bleaching granules produced by mixing at least one water-insoluble peroxy acid compound and a hydratable inorganic material at a total water content which is below the maximum hydration water content of the hydratable inorganic material and at a temperature which is below the hydration temperature of the hydratable inorganic material, until a powder is formed, raising the temperature of the resulting powder to at least the hydration temperature of the hydratable inorganic material and subsequently forming said powder into granules, wherein said granules have a size distribution range of 0.1 to 5 mm, said granules comprised of 5-60 wt. % peroxy acid, 35-95 wt. % hydratable inorganic material, up to 10 wt. % of a surface-active material, and up to 15 wt. % of a water insoluble organic compound, with the proviso that said granules do not contain a polymeric granulation aid.
Dependencies are inferred from the claim text.