Composition and method for fabric encrustation prevention comprising a lignin derivative
AssigneeThe Clorox Company
InventorStephen B. Kong
Life of this patent
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Abstract
Cleaning composition and method comprising in a first embodiment an alkali metal carbonate builder and a fabric encrustation prevention system comprising a substoichiometric level of lignosulfonic acid or its salts and esters which acts to inhibit and prevent the deposition of insoluble precipitates containing water hardness ions on fabrics; in a second embodiment the cleaning composition includes a detersive surfactant for laundry applications; in either embodiment the following adjuncts may be included: co-builders, alkali metal silicates, bleaching species, enzymes, fragrances, dyes, brighteners and others.
Claims20
A non-phosphate fabric cleaning composition comprising:
- (a) a building effective amount of an alkali metal carbonate detergent builder;
- and
- (b) a fabric encrustation preventing amount of an encrustation preventing system, including a substoichiometric amount of a lignin derivative selected from the group consisting of lignin sulfonic acid, salts or esters of lignin sulfonic acid and mixtures thereof, said amount being from about 1 to about 20% by weight.
A non-phosphate fabric cleaning composition consisting essentially of
- (a) a building effective amount of an alkali metal carbonate from about 20 to about 80 weight percent;
- (b) from about 1 to about 10 percent of a sodium silicate having a ratio of SiO.sub.2 /M.sub.2 O of about 1 to about 4, wherein M is an alkali metal;
- (c) a substoichiometric amount of a lignin derivative selected from the group consisting of lignin sulfonic acid and mixtures thereof, said amount being from about 1 to about 20% by weight;
- (d) a detersive cleaning-effective amount of a surfactant, selected from the group consisting of anionic, nonionic, cationic, amphoteric surfactants and mixtures thereof;
- and
- (e) a bleach effective amount of a bleaching species.
A method for reducing water causing hardness ion precipitation and deposition on fabric comprising contacting the fabric with a cleaning effective amount of an aqueous solution of a detergent composition comprising
- (a) a building effective amount of an alkali metal carbonate builder from about 20 to about 80 weight percent;
- (b) from about 1 to about 10 percent of a sodium silicate having a ratio of SiO.sub.2 /M.sub.2 O of about 1 to about 4, wherein M represents an alkali metal;
- (c) a substoichiometric amount of a lignin derivative selected from the group consisting of lignin sulfonic acid, salts or esters of lignin sulfonic acid and mixtures thereof, said amount being from about 1 to about 20% by weight;
- (d) a detersive cleaning effective amount of a surfactant, selected from the group consisting of anionic, nonionic, cationic, amphoteric surfactants and mixtures thereof;
- and
- (e) a bleach effective amount of a bleaching species.
Dependencies are inferred from the claim text.