Bleaching detergent composition comprises coated sodium percarbonate particles

A bleaching detergent composition which comprises:

• (A) 1 to 99 wt.% of coated sodium percarbonate particles having an average particle of from 100 to 2000 microns, each of said particles comprising a sodium percarbonate core completely enclosed by a coating film of a coating agent consisting essentially of 10 to 100 wt.% of a sodium borate selected from the group consisting of sodium metaborates, sodium tetraborates, sodium pentaborates, and sodium octaborates, the amount of said coating film being in the range of from 0.1 to 30 wt.% of the weight of said sodium percarbonate;
• and (B) a detergent base consisting essentially of at least one member selected from the group consisting of water-soluble soaps, anionic, nonionic or amphoteric surfactants, builders, sequestering agents, bulk fillers, detergent enzymes, bleach activating agents, fluorescent brightening agents and perfumes.

A process for preparing a bleaching detergent composition which consists essentially of forming granules of sodium percarbonate which are wetted with water;

• mixing said wetted granules with a coating agent powder consisting essentially of 10 to 100 wt.% of a sodium borate selected from the group consisting of sodium tetraborate decahydrate, sodium tetraborate pentahydrate, sodium tetraborate tetrahydrate, anhydrous sodium tetraborate, sodium octaborate tetrahydrate, sodium pentaborate pentahydrate, sodium metaborate tetrahydrate, and sodium metaborate dihydrate, whereby said powder adheres to the surfaces of said granules, then drying said granules at a temperature sufficient to melt said borate and not higher than 160.degree. C., whereby said granules are individually coated with a coating film of said borate, and then mixing said coated granules with a detergent base, the amount of said coated granules being 1 to 99 wt.% of the total weight of said bleaching detergent composition.