Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Patent
1995-05-19
1997-11-11
Hertzog, Ardith
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
510122, 510137, 510159, 510467, 510488, 510505, 510506, C11D 137, C11D 106, C11D 134, C11D 1100
Patent
active
056864035
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a cleanser composition comprising a phosphate surfactant having an excellent cleansing power and being low irritative to the skin and hair.
The cleanser composition of the present invention is useful as a skin cleanser such as a facial cleanser and a body shampoo or as a hair cleanser such as a shampoo.
Even when the cleanser composition of the present invention contains a high concentration of the phosphate surfactant, it neither causes an increase in viscosity nor gelation.
DESCRIPTION OF THE RELATED ART
Since phosphate surfactants are low irritant to the skin and hair, as compared with soap, alkyl ether sulfates, alkyl sulfates, etc., they are useful as a component of a body cleanser and are used in combination with various anionic and nonionic surfactants (Japanese Patent Publication-A No. 1-316309, etc.).
In the preparation of a cleanser such as a hair shampoo and a body shampoo, a mean which comprises first preparing a surfactant solution containing a high concentration of a surfactant and then adding components, such as a humectant, an oily component, a conditioning component and a powder, and water to the solution to adjust the surfactant concentration to a desired value, is usually employed. However, when the phosphate surfactant is a triethanolamine salt or alkali metal salt thereof and the concentration thereof in the solution is 30% by weight or above, a rapid viscosity increase and gelation are caused to make the handling thereof difficult.
Such a phosphate salt as that described above is prepared by neutralizing a phosphate surfactant having a hydroxyl group. In the neutralization, a large amount of a solvent has been added thereto or a solution containing a low concentration of the phosphate surfactant having a hydroxyl group has been used hitherto in order to keep the viscosity of the solution low after neutralization. The addition of the large amount of the solvent impairs the properties, such as lathering and feeling, of the cleanser to be obtained. While, when a solution containing a low concentration of the phosphate surfactant having a hydroxyl group is used for the neutralization, the neutralized product contains a large amount of water and, therefore, there is a problem that the amount of a third component to be incorporated is limited in the production of the final product by adding the third component thereto.
Accordingly, an object of the present invention is to provide a cleanser composition containing a phosphate surfactant characterized by having a skin-cleansing property and being a low irritant, the viscosity of which composition is not increased even when the concentration of the phosphate salt is 30% by weight or above.
DISCLOSURE OF THE INVENTION
The present inventors have been made extensive investigations under these circumstances. As the result, the inventors have found that a cleanser composition satisfying the above-described requirements can be obtained by using a specific alkyl phosphate surfactant in combination with a specific ether acetic acid surfactant. The present invention has been completed on the basis of this finding.
Thus, the present invention provides a cleanser composition comprising at least 30% by weight, based on the total weight of the composition, of the following component (A), and the following component (B): (1) or a mixture thereof with another phosphate surfactant represented by the following formula (2), wherein the weight ratio of the phosphate surfactant (1) to the phosphate surfactant (2) is 100/0 to 70/30; ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represents a linear or branched alkyl or alkenyl group having 8 to 18 carbon atoms, X.sup.1, X.sup.2 and Y each represents a hydrogen atom, an alkali metal atom, a triethanolammonium group or an ammonium group; and formula (3); having 8 to 18 carbon atoms, X.sup.3 represents a hydrogen atom, an alkali metal atom, a triethanolammonium group or an ammonium group, and p represents a number of 3 to 15.
Further, the present inve
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English translation of JP 3-106999, published May 1991.
English translation of JP 3-109498, published May 1991.
English translation of JP 3-182598, published Aug. 1991.
English language abstract of JP-A No. 1-316309, Dec. 21, 1989.
English language abstract of JP-A No. 57-49698, Mar. 23, 1982.
Hioki Yuichi
Kobayashi Takatoshi
Matsumoto Chikako
Moriyama Tadashi
Hertzog Ardith
Kao Corporation
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