Detergent compositions containing calcium carbonate
AssigneeLever Brothers Company
InventorsCharles Bloor Davies, James Francis Davies, William Fredrick Soutar Neillie
Life of this patent
Estimating the term…
Abstract
Detergent compositions based on sodium carbonate as a detergency builder also contain finely divided calcium carbonate having a surface area of at least about meters square metres per gram (m.sup.2 /g), preferably frm about 30 to 100 m.sup.2 /g, together with a detergent active compound or mixture of compounds which does not form during use an insoluble calcium salt. The added calcium carbonate tends to improve the detergency building action of the sodium carbonate, and so increase detergency, whilst inhibiting the tendency for the newly precipitated calcium carbonate to be deposited on the washed fabrics.
Claims30
A detergent composition comprising from about 5 to about 40% of a detergent active compound selected from the group consisting of an anionic active which does not form an insoluble calcium salt during use, a nonionic active, an amphoteric active, a zwitterionic active and mixtures thereof, from about 10 to about 75% of sodium or potassium carbonate, and from about 5 to about 60% of finely divided precipitated calcium carbonate prepared by passing carbon dioxide into a suspension of calcium hydroxide, said calcium carbonate having a surface area of about 30 to about 100 square meters per gram (m.sup.2 /g), the percentages being expressed by weight of the composition.
A detergent composition comprising from about 5 to about 40% of a detergent active compound selected from the group consisting of an anionic active which does not form an insoluble calcium salt during use, a nonionic active, an amphoteric active, a zwitterionic active and mixtures thereof, from about 20 to about 60% of sodium or potassium carbonate and from about 20 to about 50% of finely divided precipitated calcite prepared by passing carbon dioxide into a suspension of calcium hydroxide, said calcite having a surface area of about 20 to about 100 square meters per gram (m.sup.2 /g), the percentages being expressed by weight of the composition.
Dependencies are inferred from the claim text.