JPH0529202B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention provides a shampoo composition, more specifically, a shampoo composition containing a specific branched fatty acid cholesteryl ester,
This invention relates to a shampoo composition that has excellent conditioning effects and gloss-imparting effects on hair. [Prior art and its problems] Conditioning agents that are conventionally added to shampoos to improve the flexibility and smoothness of the hair after use, and to impart a lingering feeling, include:
Cationized polymers, ester oils, etc. are known. However, cationic polymers make the hair hard after drying, causing discomfort after use, and ester oils are oily and sticky after drying, so shampoos containing these as conditioning agents are This was far from meeting the demands of consumers who seek a natural finish. [Means for Solving the Problems] Under these circumstances, the inventors of the present invention have made extensive studies to solve the above problems, and have found that a specific cholesteryl ester, which is a substance similar to sebum, can be used as a conditioning agent. The present invention was completed based on the discovery that the intended purpose was achieved and, moreover, it was surprisingly possible to impart beautiful luster to hair. That is, the present invention provides general formula (), (wherein R is a saturated aliphatic hydrocarbon group having a total of 11 to 23 carbon atoms and having at least one alkyl substituent from the carboxyl bond position to the center of the main chain) 0.1 to 10.0% by weight of fatty acid cholesteryl ester in the total composition (hereinafter expressed as %)
The present invention provides a shampoo composition characterized by containing: The branched fatty acid cholesteryl ester represented by the formula () used in the present invention is produced from a branched fatty acid or a derivative thereof and cholesterol by a conventional method for producing esters (Japanese Patent Publication No. 59-197-
Publication No. 23320). The branched fatty acid and cholesterol can be directly reacted and esterified, or either one can be converted into a highly reactive derivative and then esterified. Branched fatty acid (RCOOH), which is the raw material for producing branched fatty acid cholesteryl ester, has a carbon number of 12 to 24 (R
(11 to 23 carbon atoms) can be used, but
Those having 14 to 20 carbon atoms (R being 13 to 19 carbon atoms) are preferred, and those having 18 carbon atoms are most preferred. A branched fatty acid has at least one branched fatty acid from the carboxyl group bonding position to the center of the main chain.
It needs to be a saturated branched fatty acid with two alkyl substituents. Such saturated branched fatty acids can be easily obtained from petrochemical raw materials or oleochemical raw materials. An example of such a branched fatty acid obtained from petrochemical raw materials is a branched fatty acid having a side chain at the α position, which is represented by the following formula (). (In the formula, R ₁ and R ₂ are each a linear or branched saturated aliphatic hydrocarbon group, and the sum of the number of carbon atoms of R ₁ and R ₂ is 12 to 18.) The above formula ( ) A branched fatty acid having a side chain at the α-position is obtained by, for example, aldol condensation of a linear or branched aldehyde having 7 to 10 carbon atoms to form an α-branched unsaturated aldehyde, which is then hydrogenated and oxidized. It can be produced by a method of producing branched saturated fatty acids. A preferred example of a saturated branched fatty acid having a side chain at the α-position is 5,7,7-trimethyl-2-
(1,3,3-trimethylbutyl)-octanoic acid,
Examples include 2-heptylundecanoic acid and 2-hexyldecanoic acid. An example of a saturated branched fatty acid obtained from oleochemical raw materials is a fatty acid having a methyl branched chain represented by the following formula (). (In the formula, the sum of m and n is 14, and the distribution is centered around m = n = 7.) Such methyl branched chain fatty acids are obtained, for example, as a by-product during the production of oleic acid dimer [for example, Journal of American Oil Chemistry Society (J.Amer.Oil)
Chem.Soc.) 51 , 522 (1974)], herein:
It is called methyl branched isostearic acid. Methyl branched isostearic acid is commercially available, for example as its isopropyl ester (eg Emery, USA). Furthermore, in addition to cholesterol produced by various methods, those obtained by extraction or extraction and purification from natural substances, such as those obtained from dried cow brain, spinal cord, etc., can also be used. Among these branched fatty acid cholesteryl esters (), methyl branched isostearic acid cholesteryl ester is most preferred. Branched fatty acid cholesteryl ester () is blended in the shampoo composition of the present invention in an amount of 0.1 to 10.0%, particularly preferably 0.2 to 2%.
If it is less than 0.1%, the effect of the present invention will not be sufficiently exhibited,
If it exceeds 10.0%, the system will gel, which is not preferable. The composition of the present invention is produced by blending branched fatty acid cholesteryl ester (), a surfactant used as a base of known shampoo compositions, and other ingredients known per se in accordance with a conventional method. Ru. Examples of the surfactant include anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants as shown below. Anionic surfactant: (1) A straight or branched alkylbenzene sulfonate having an alkyl group having an average carbon number of 10 to 16. (2) Contains a linear or branched alkyl group or alkenyl group with an average of 10 to 20 carbon atoms, and an average of
0.5 to 8 moles of ethylene oxide, propylene oxide, butylene oxide, 0.1/9.9 of ethylene oxide and propylene oxide
Alkyl or alkenyl ether sulfates in a ratio of ~9.9/0.1 or ethylene oxide and butylene oxide added in a ratio of 0.1/9.9 to 9.9/0.1. (3) An alkyl or alkenyl sulfate having an alkyl or alkenyl group having an average carbon number of 10 to 20. (4) Olefin sulfonate having an average of 10 to 20 carbon atoms in one molecule. (5) Alkanesulfonate having an average of 10 to 20 carbon atoms in one molecule. (6) Saturated or unsaturated fatty acid salts having an average of 10 to 24 carbon atoms in one molecule. (7) It has an alkyl group or alkenyl group with an average carbon number of 10 to 20, and an average of 0.5 to 8 moles of ethylene oxide, propylene oxide, butylene oxide, ethylene oxide and propylene oxide in 0.1/9.9 to 9.9/1 molecule. Alkyl or alkenyl ether carboxylates to which butylene oxide of ethylene oxide is added in a ratio of 0.1 or in a ratio of 0.1/9.9 to 9.9/0.1. (8) α-Sulfo fatty acid salts or esters having an alkyl or alkenyl group consisting of an average of 10 to 20 carbon atoms. (9) N-acylamino acid type surfactant having an acyl group having 8 to 24 carbon atoms and a free carboxylic acid residue. (10) A phosphoric acid mono- or diester type surfactant having an alkyl group or an alkenyl group having 8 to 24 carbon atoms. Ampholytic surfactant: (11) An α-position addition type, secondary amide type, or tertiary amide type imidazoline type amphoteric surfactant having an alkyl group, alkenyl group, or acyl group having 8 to 24 carbon atoms. (12) A carbobetaine-based, amidobetaine-based, sulfobetaine-based, hydroxysulfobetaine-based, or amidosulfobetaine-based amphoteric surfactant having an alkyl group, alkenyl group, or acyl group having 8 to 24 carbon atoms. Nonionic surfactant: (13) Polyoxyethylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 moles of ethylene oxide is added. (14) It has an alkyl group with an average carbon number of 6 to 12, and 1 to
Polyoxyethylene alkyl phenyl ether with 20 moles of ethylene oxide added. (15) A polyoxypropylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 mol of propylene oxide is added. (16) Polyoxybutylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 mol of butylene oxide is added. (17) A nonionic surfactant containing an alkyl group or alkenyl group with an average carbon number of 10 to 20 and a total of 1 to 30 moles of ethylene oxide and propylene oxide or ethylene oxide and butylene oxide (ethylene oxide and propylene oxide). oxide or butylene oxide is 0.1/9.9 to 9.9/0.1) (18) Higher fatty acid alkanolamide or its alkylene oxide adduct having a long chain acyl group having 10 to 20 carbon atoms. (19) A sucrose fatty acid ester consisting of a fatty acid with an average carbon number of 10 to 20 and sucrose. (20) A fatty acid glycerin monoester consisting of a fatty acid with an average carbon number of 10 to 20 and glycerin. (21) Alkylamine oxide having an alkyl group or alkenyl group having 1 to 20 carbon atoms. Cationic surfactant: (22) Mono- or di-long chain alkyl quaternary ammonium salt having a long chain alkyl group or alkenyl group having 10 to 20 carbon atoms. Counter ions for the anionic residues of these surfactants include alkali metal ions such as sodium and potassium, alkaline earth metal ions such as calcium and magnesium, ammonium ions, and alkanol groups having 2 or 3 carbon atoms. alkanolamines (e.g. monoethanolamine,
diethanolamine, triethanolamine, triisopropanolamine, etc.). In addition, examples of counter ions for cationic residues include halogen ions such as chlorine, bromine, and iodine, and methosulfate and saccharinate ions. Among these surfactants, the main ones are (2) alkyl ether sulfates, (3) alkyl sulfates, (4) anionic surfactants such as olefin sulfonates, and (11) imidazoline amphoteric surfactants. Preferred as an activator. Suitable examples include sodium polyoxyethylene lauryl ether sulfate (average addition of 2 to 3 moles of ethylene oxide), triethanolamine lauryl sulfate, and sodium α-olefin sulfonate (average carbon number 12 to 14). These surfactants are preferably blended in the shampoo composition of the present invention in a total amount of 5 to 30%, particularly 10 to 20%. In addition, other ingredients include, for example, solubilizing agents such as propylene glycol and glycerin, ethanol, inorganic salts, higher alcohols, viscosity modifiers such as hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, and methyl cellulose, other fragrances, pigments, and ultraviolet rays. Absorbents, antioxidants, anti-dandruff agents, bactericides, preservatives, etc. may be added as necessary. The remainder is water, which is usually used in a proportion of 50 to 90%, preferably 60 to 80%. [Effects of the Invention] The shampoo composition of the present invention can impart a natural finish to hair after washing due to its conditioning effect and gloss-imparting effect on hair. [Example] Next, an example will be given and explained. Example 1 Shampoo compositions shown in Table 1 were prepared by a conventional method, and their performance was evaluated by the following method. The results are shown in Table 1. (i) Conditioning effect After soaking 20g of wool in warm water (40℃),
1 g of shampoo composition was applied and squeezed for about 1 minute. Next, this was rinsed under running water at 40° C. for 30 seconds, and the residual feeling on the hair cloth was sensory evaluated using the following evaluation criteria. Evaluation criteria 〇: Good conditioning effect ○△: Average △: Slight conditioning effect ×: No conditioning effect at all (ii) Shine imparting effect 10g of black hair from a Japanese woman was applied to each The hair was treated with a hair rinse composition (40°C, 30 minutes), and the gloss after drying was compared with that of untreated hair (control), and the gloss imparting effect was evaluated using the following criteria. ×: No difference from the control △: Slight gloss imparting effect observed 〇: Obvious gloss imparting effect observed ◎: Significant gloss imparting effect observed

【table】

[Table] ** The remainder is water.

[Claims]

1 The following components (A) and (B) (A) The following general formula () or () (In the formula, R ₁ , R ₂ and R ₃ each represent a saturated or unsaturated hydrocarbon group having 8 to 18 carbon atoms, and X and Y each represent hydrogen, an alkali metal, ammonium, or a hydroxyalkyl group having 2 or 3 carbon atoms. Indicates that it is a salt of an alkanolamine having a group,
(l, m and n each represent a number from 0 to 10) 5 to 50% by weight of one or more phosphate ester surfactants represented by (B) the following general formula () (In the formula, RCO is a linear or branched acyl group of a fatty acid having 6 to 22 carbon atoms, A is CH ₃ or hydrogen, p