Laundry detergent product with improved cold water residue properties
AssigneeChurch & Dwight Co., Inc.
InventorLouis R. Mazzola
Life of this patent
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Abstract
This invention provides a high carbonate-low phosphate powder laundry detergent formulation which can be utilized in cold water fabric laundering with a minimized remainder of undissolved detergent residue in the wash water. An essential aspect of the laundry detergent formulation is a content of a partially sulfated and neutralized blend of ethoxylated alcohol surfactant constituents. A preferred type of surfactant ingredient is a Neodol 23-3 derived type of blend which is 50-65 percent sulfated and neutralized. Another essential aspect is a content of polyethylene glycol ingredient which increases the solubility of the laundry detergent solids in the wash water.
Claims13
A powder laundry detergent composition with improved cold water residue properties, which is a granulated blend of ingredients consisting essentially of (1) between about 40-90 weight percent of a water-soluble detergent builder ingredient wherein at least about 74 weight percent of the detergent builder ingredient is sodium carbonate;
- and (2) between about 5-40 weight percent of a detergent active ingredient which is a surfactant blend comprising (a) between about 40-80 weight percent, based on the surfactant weight, of an anionic salt compound corresponding to the formula:
- R—O—(CH2CH2O)n—SO3M
- where R is a C10-C15 alkyl group, n is an average number of ethoxylate groups between about 1-9, and M is an alkali metal or ammonium cation, (b) between about 20-60 weight percent, based on surfactant weight, of a nonionic compound corresponding to the formula:
- R—O—(CH2CH2O)n—H
- where R is a C10-C15 alkyl group, and n is an average number of ethoxylate groups between about 1-9;
- and (c) between about 5-30 weight percent, based on the surfactant weight, of a polyethylene glycol constituent corresponding to the formula:
- H—(OCH2CH2)n—OH
- where n is an average number of ethoxylate groups between about 20-240;
- (3) between about 0.5-10 weight percent of water-soluble inorganic potassium salt;
- and (4) less than about 2 weight percent of phosphate salt.
A detergent active composition which is a surfactant blend consisting essentially of (a) between about 40-80 weight percent of an anionic salt compound corresponding to the formula:
- R—O—(CH2CH2O)n—SO3M
- where R is a C10-C15 alkyl group, n is an average number of ethoxylate groups between about 1-9, and M is an alkali metal or ammonium cation, (b) between about 10-50 weight percent of a nonionic compound corresponding to the formula:
- R—O—(CH2CH2O)n—H
- where R is a C10-C15 alkyl group, and n is an average number of ethoxylate groups between about 1-9;
- and (c) between about 5-30 weight percent of a polyethylene glycol constituent corresponding to the formula:
- H—(OCH2CH2)n—OH
- where n is an average number of ethoxylate groups between about 20-240.
Dependencies are inferred from the claim text.