Fabric washing process and detergent composition for use therein

Details Fabric washing process and detergent composition for use therein Fabric washing process and detergent composition for use therein

1982-06-11

1985-04-30

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

Cleaning or laundering

Removing formation impurities from artifical fiber

25217414, B08B 300, B08B 308

Patent

active

045141851

ABSTRACT:
Fabric, particularly soiled fabrics containing calcium carbonate crystal growth poisons, may be washed in hard water to which has been added a detergent active material and an alkali metal carbonate if a secondary detergency builder is added after a defined critical state of the system is reached. The secondary builder may be a precipitating, sequestering or ion exchange builder, and is added in such an amount which would be insufficient, in the absence of the carbonate, to reduce the free calcium ion concentration to less than 10.sup.-5 molar. The delayed addition can be achieved by separate dosing, coating the secondary builder, dosing the composition in the form of a two-compartment sachet or forming the secondary builder material in situ. The composition may include a material, such as calcite, to promote the occurrance of the critical state.

REFERENCES:
patent: 2381960 (1945-08-01), Johnson
patent: 4040988 (1977-08-01), Benson

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