Method for improving the stability of detergent bleach compositions

Claim 1

A method for the preparation of storage-stable detergent bleaching compositions containing an inorganic peroxygen bleach compound and, as an activator therefore, a substituted halotriazine compound represented by the formula: ##SPC2## where X represents chlorine or bromine; and R 1 and R 2 individually represent chlorine, bromine, hydroxy, mercapto, lower alkyl, lower alkoxy, phenoxy, dimethoxyphosphinyl, or ##EQU2## where R 3 and R 4 individually represent hydrogen, lower alkyl, lower cyanoalkyl, lower hydroxyalkyl or phenyl, or where R 3 and R 4 taken together complete a heterocyclic ring selected from morpholine, piperazine and piperidine rings; said method comprising forming an aqueous slurry of a detergent composition and said substituted halotriazine compound having a solids content in the range of about 50% to 65%, de-aerating and spray-drying said slurry using a counter-current air flow at an inlet temperature of about 350°C. to 400°C., an outlet temperature of about 90°C. to 110°C. and a nozzle atomizing pressure in the range of 30 to 60 atmospheres, to provide a composition with a moisture content in the range of about 8 to 13% and a bulk density in the range of about 0.30 to 0.35 gram/cm 3 ; dry blending said dried composition with said inorganic peroxygen bleach compound to provide in the storage-stable detergent composition a mole proportion of activator to peroxygen compound in the range of about 1:1 to 1:10.

Claim 2

A method for the preparation of storage-stable detergent bleaching compositions containing an inorganic peroxygen bleach compound and, as an activator therefore, a substituted halotriazine compound represented by the formula: ##SPC2## where X represents chlorine or bromine; and R 1 and R 2 individually represent chlorine, bromine, hydroxy, mercapto, lower alkyl, lower alkoxy, phenoxy, dimethoxyphosphinyl, or ##EQU2## where R 3 and R 4 individually represent hydrogen, lower alkyl, lower cyanoalkyl, lower hydroxyalkyl or phenyl, or where R 3 and R 4 taken together complete a heterocyclic ring selected from morpholine, piperazine and piperidine rings; said method comprising forming an aqueous slurry of a detergent composition and said substituted halotriazine compound having a solids content in the range of about 50% to 65%, de-aerating and spray-drying said slurry using a counter-current air flow at an inlet temperature of about 350°C. to 400°C., an outlet temperature of about 90°C. to 110°C. and a nozzle atomizing pressure in the range of 30 to 60 atmospheres, to provide a composition with a moisture content in the range of about 8 to 13% and a bulk density in the range of about 0.30 to 0.35 gram/cm 3 ; dry blending said dried composition with said inorganic peroxygen bleach compound to provide in the storage-stable detergent composition a mole proportion of activator to peroxygen compound in the range of about 1:1 to 1:10.