JP2005314614A - Detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition scarecely irritating the skin, capable of giving a good lather, and capable of being prevented from increasing in viscosity, even when made to have a high phosphoric acid salt concentration of ≥50 wt%. <P>SOLUTION: This detergent composition contains a component (A) and a component (B), wherein the component (A) comprises a phosphoric acid-based surfactant which comprises a mixture of (a1) a phosphoric acid monoester expressed by general formula (1) (R<SP>1</SP>is a 8-18C alkyl or alkenyl; X<SP>1</SP>and Y<SP>1</SP>are each H, an alkali, an alkaline earth, a basic amino acid residue, an alkanolamine or ammonium; and k is a number of 0 to 10) and (a2) a phosphoric acid diester expressed by general formula (2) (R<SP>2</SP>and R<SP>3</SP>are each a 8-18C alkyl or alkenyl; X<SP>2</SP>is H, an alkali, an alkaline earth, a basic amino acid residue, an alkanolamine or ammonium; and m and n are each a number of 0 to 10) and has such a weight ratio of the component (a1) contained therein to the component (a2) as to satisfy: (a1)/(a2)=95/5 to 50/50, the component (B) comprises a glyceryl ether having a 4-12C alkyl or alkenyl, and the component (A) is contained in an amount of more than 60 wt%. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a detergent composition containing a phosphate ester-based surfactant at a high concentration. Specifically, it does not cause an increase in viscosity or gelation, has an excellent detergency, and is irritating to skin and hair. The present invention relates to a low cleansing composition useful as a personal cleansing agent.

  Detergent compositions that come into direct contact with the skin, such as shampoos and whole body cleansers, are required to have low irritation to the skin in addition to detergency, foam performance, and feeling of use. Sulfate-type surfactants widely used as a cleaning component have high foam performance, but may be squeezed during shampooing or may cause rough skin on hands and skin when used for a long time. In addition, when a so-called hypoallergenic surfactant such as an acetate-type surfactant, an amphoteric surfactant, or a surfactant having a sugar skeleton is used as a main component, the cleaning effect and foaming power are poor and sufficient. It is difficult to obtain a cleaning agent. Furthermore, the phosphate ester type surfactant has a problem that it is poor in foaming power although it is satisfactory in low skin irritation and cleanability.

  Also, when preparing detergents such as hair shampoos and body shampoos, usually prepare a concentrated surfactant solution, and then add a moisturizer, oily component, rinse component, powder and other components, water, etc. A means for obtaining a desired concentration is employed. However, neutralization of phosphate ester surfactants with triethanolamine salt or alkali metal salt causes a sudden increase in viscosity or gelation at a concentration of 50% by weight or more as a phosphate ester salt, making handling difficult. . Therefore, conventionally, when neutralizing a high concentration phosphate ester surfactant, there was no method other than by reducing the viscosity by adding a large amount of solvent or the like or neutralizing at a low concentration. Addition of a large amount of solvent, etc. causes deterioration in performance as a cleaning agent in terms of foaming properties and feel. On the other hand, neutralization with a low concentration of phosphate ester is naturally a large amount when a neutralized product is added to the final formulation. In this case, there is a problem that the amount of the third component is limited.

Patent Document 1 describes a detergent composition comprising a phosphate ester surfactant composed of a mixture of a phosphate monoester and a phosphate diester, and an ether-type acetate surfactant. A composition containing an acid ester at a high concentration of 50% by weight or more and having excellent fluidity is not described.
Patent Document 2 describes a detergent composition containing a phosphate ester or a salt thereof and glyceryl ether, but the content of the phosphate ester or a salt thereof in the entire composition is 60% by weight or less. A composition containing a phosphate ester at a high concentration exceeding 60% by weight and having excellent fluidity is not described.
JP 7-138593 A JP 2001-107079 A

  An object of the present invention is to provide a cleaning composition that does not cause irritation to the skin and not only gives good foaming but also does not cause an increase in viscosity even when the phosphate ester salt has a high concentration of 50% by weight or more. Is to provide.

When the present inventors use a specific phosphate ester surfactant in combination with a specific glyceryl ether and / or a polyhydric alcohol, the phosphoric acid is less irritating to the skin while maintaining good foaming. It has been found that a detergent composition that does not increase the viscosity even when the concentration of the ester salt is 50% by weight or higher can be obtained.
That is, the present invention includes the following components (A) and (B):
(A) (a1) A mixture of a phosphoric acid monoester represented by the general formula (1) and (a2) a phosphoric acid diester represented by the general formula (2), wherein the content ratio is ( a1) / (a2) = 95 / 5-50 / 50 phosphate ester surfactant:

(In the formula, R ¹ , R ² and R ³ each represent a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms, and X ¹ , X ² and Y ¹ are a hydrogen atom and an alkali metal atom, respectively. , An alkaline earth metal atom, a basic amino acid residue, an alkanolamine or ammonium, and the average number of added moles k, m and n are each 0 to 10);
(B) A detergent composition containing a glyceryl ether having a linear or branched alkyl group or alkenyl group having 4 to 12 carbon atoms, wherein the content of component (A) is more than 60% by weight. It is.
This invention also contains the said component (A) and component (C) polyhydric alcohol, the content rate of a component (A) is 50 weight% or more, and content of a component (C) is 0.1-25. It is intended to provide a cleaning composition that is weight percent.

  The cleaning composition of the present invention is excellent in foaming power, less irritating to the skin and the like, and excellent in fluidity.

In the phosphoric acid ester represented by the general formula (1) or (2) of the component (A) used in the present invention, R ¹ , R ² and R ³ are each linear or branched having 8 to 18 carbon atoms. Although an alkyl group or an alkenyl group is shown, a linear or branched alkyl group or alkenyl group having 10 to 16 carbon atoms is preferable.
R ¹ in the formula (1) is preferably a linear alkyl group or alkenyl group having 8 to 18 carbon atoms, particularly an octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, tetradecyl group, A linear alkyl group such as a pentadecyl group is preferred.
R ² and R ³ in the formula (2) are preferably linear alkyl groups or alkenyl groups having 8 to 18 carbon atoms, particularly octyl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, Straight chain alkyl groups such as a tetradecyl group and a pentadecyl group are preferred.
X ¹ , X ² and Y ¹ are, for example, lithium, sodium, potassium and the like as alkali metals; alkaline earth metals, such as magnesium; and basic amino acids such as arginine, lysine, histidine, ornithine and the like. Alkanolamines include, for example, triethanolamine, diethanolamine, monoethanolamine and the like, and alkali metals such as potassium and sodium or triethanolamine are preferable, and potassium is particularly preferable from the viewpoint of solubility in water.
The average added mole numbers k, m and n are each preferably 0 to 4, more preferably 0 to 2.

  The cleaning composition of the present invention containing the component (A) and the component (C) may further contain the component (B).

  The content ratio of (a1) and (a2) in the component (A) is a weight ratio (a1) / (a2) = 95/5 to 50/50 from the viewpoint of foamability and fluidity. / 5-60 / 40 is preferable, and 95 / 5-70 / 30 is more preferable. A high content of (a1) is preferable in terms of foaming power and cleaning power.

  The glyceryl ether of component (B) used in the present invention has a linear or branched alkyl group or alkenyl group having 4 to 12 carbon atoms, such as an n-butyl group, an isobutyl group, or a tert-butyl group. , N-pentyl group, isopentyl group, n-hexyl group, isohexyl group, n-heptyl group, n-octyl group, 2-ethylhexyl group, n-nonyl group, n-decyl group, n-lauryl group, etc. Those having an alkyl group of 4 to 12 are preferred, and further preferably having 1 or 2 and especially 1 of an alkyl group having 4 to 11 carbon atoms, particularly 6 to 10 carbon atoms, and especially 8 carbon atoms.

  One or more glyceryl ethers of the component (B) can be used, and 0.1 to 20% by weight, more preferably 0.1 to 10% by weight, and particularly 0.1 to 5% by weight are incorporated in the total composition. Is preferable in terms of fluidity and foaming power.

  When the component (B) is present in the cleaning composition of the present invention, the component (A) in the total composition is more than 60% by weight, preferably 62 to 80% by weight, more preferably 64 to 75% by weight. Even when it is blended in%, its fluidity is good at room temperature (25 ° C.) without increasing its viscosity or gelling.

  Examples of the polyhydric alcohol of component (C) include lower polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, and triglycerin, among which propylene glycol and dipropylene glycol are preferable.

  As the component (C), one or more polyhydric alcohols can be used, and the total composition contains 0.1 to 25%, preferably 1.0 to 15%, more preferably 1.0 to 10%. Is done. By blending 0.1% by weight of component (C), the component (A) can be made into a high concentration solution of 50% by weight or more.

  In the cleaning composition of the present invention, when the component (C) is present in an amount of 0.1 to 25% by weight, the component (A) in the whole composition is 50% by weight or more, preferably 50 to 80% by weight, Even when 50 to 70% by weight, particularly preferably 50 to 60% by weight is blended, the viscosity does not increase or gelation occurs, and good fluidity is exhibited at room temperature (25 ° C.).

  The blending ratio of the component (A) and the component (B) in the detergent composition of the present invention is (A) / (B) = 40/1 to 5/1 in terms of weight ratio from the viewpoint of detergency and foaming power. It is preferable that it is 35 / 1-5 / 1, More preferably, it is 30 / 1-10 / 1.

  Moreover, the compounding ratio in this invention detergent composition of a component (A) and a component (C) is (A) / (C) = 20/1-2/1 by weight ratio from a fluid viewpoint. It is preferably 15/1 to 3/1, more preferably 15/1 to 5/1.

  The cleaning composition of the present invention is a cleaning composition useful as a body cleaning agent such as a skin cleaning agent such as a facial cleanser, a shampoo, a body shampoo, or a hair cleaning agent. Any component can be blended depending on the purpose. Here, examples of the optional component include other anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactant conditioning components that are usually blended in these detergents.

  Other anionic surfactants include fatty acid salts, alkyl sulfates, polyoxyalkylene alkyl ether sulfates, sulfosuccinic acid based activators, sulfosuccinamate based activators, polyoxyalkylene alkyl amide ether sulfates, monoglyceride sulfates Olefin sulfonate, alkane sulfonate, acylated isethionate, acylated amino acid salt, polyoxyalkylene alkyl ether phosphate and the like. Nonionic surfactants include alkyl polyglucosides, sucrose fatty acid esters, polyglycerin fatty acid esters, polyoxyalkylene alkyl ethers, fatty acid alkanolamides, alkylamine oxides, fatty acid polyhydric alcohol esters, and the like. Examples of the cationic surfactant include linear or branched mono- or di-long alkyl quaternary ammonium salts, mono- or di-long alkyl tertiary amines, and the like. Amphoteric surfactants include amide amino acid based activators, carbobetaine activators, sulfobetaine activators, amide sulfobetaine activators, imidazolinium betaine activators, amino acid based betaine activators, phosphobetaine activators. Agents and the like.

  Conditioning components include higher alcohols, silicones and silicone derivatives, lanolin, squalene, hydrocarbons, protein derivatives, oil agents such as fatty acid esters of polyethylene glycol, cations such as cationized cellulose, cationized guar gum and Marquat 550 (Merck). Examples thereof include polymers.

  Other components commonly used in cleaning compositions, for example, water-soluble polymers such as polysaccharides such as methylcellulose, hydroxyethylcellulose, carboxyvinyl polymer, xanthan gum; polyoxyalkylene sorbitan esters, polyoxyethylene glycol distearate Viscosity modifiers such as ethanol; Chelating agents such as ethylenediaminetetraacetic acid (EDTA) and phosphonates; Preservatives such as methylparaben and butylparaben; Active ingredients such as vitamins and their precursors; Animal and plant extracts such as lecithin and gelatin Or its derivatives; polymer fine powders such as nylon and polyethylene; anti-inflammatory agents such as dipotassium glycyrrhizinate; bactericides and antidandruff agents such as triclosan, trichlorocarban, octopirox, zinc pyrithione; dibutylhydroxytoluene, etc. Antioxidants; pearling agents, ultraviolet absorbers, pH adjusting agents, dyes, perfumes, water, can be optionally added within the range not damaging the effects of the present invention.

  The cleaning composition of the present invention can be produced according to a conventional method. Also, the dosage form is not particularly limited, and any dosage form such as liquid, paste, cream, solid, powder, etc. can be formed, preferably liquid, paste, cream, particularly liquid Is preferable. When the liquid is used, it is preferable to use water as the liquid medium. The cleaning composition of the present invention is particularly suitable as a cleaning agent for body such as skin and hair.

  The cleaning composition of the present invention preferably has a pH of 5 to 10, particularly a pH of 5.5 to 7.5.

Examples 1-10, Comparative Examples 1-4
Cleaning compositions having the compositions shown in Tables 1 and 2 were prepared according to conventional methods, and foaming power, irritation and fluidity were evaluated by the following methods. These measurements and evaluations were all performed at a solution pH of 7.
<Foaming power> An aqueous solution obtained by diluting each detergent composition to a total active agent concentration of 1% by weight is prepared, and 100 mL of this solution (liquid temperature 40 ° C.) is poured into a 1000 mL measuring cylinder. Next, after adding lanolin to a concentration of 0.5% by weight, four stirring blades with a diameter of 5 cm were installed, stirred for 5 minutes at 1000 r / min, and the foam volume (mL) after 30 seconds was measured. The amount of foaming was evaluated based on the following criteria. The stirring blades were inverted every 5 seconds.
A: Foaming amount of 200 mL or more O: Foaming amount of 150 mL or more, less than 200 mL Δ: Foaming amount of less than 150 mL <Irritation> 10 mL was taken in a glass cup having a diameter of 3.5 cm placed on the forearm of 10 professional panelists and brought into contact with the skin for 30 minutes a day. After performing this continuously for 3 days, the skin condition was evaluated according to the following criteria.
○: No more than 5 people are found to be dropped Δ: No less than 6 people are seen to drop, but no erythema is seen x: Drops and erythema are seen in more than 6 people <fluidity> 80 g of each detergent composition is placed in a 100 mL glass bottle (No. 11 standard bottle / manufactured by ASONE Co., Ltd.) and heated to 30 ° C. When the container was tilted at 90 ° C., the time until each cleaning composition came out of the bottle was measured and evaluated according to the following criteria.
○: Flows out of the bottle within 5 seconds Δ: Flows out of the bottle within 6 to 29 seconds ×: Does not flow out of the bottle even after 30 seconds

  Using the detergent composition of the present invention, the following body shampoos, facial cleansers and shampoos of Examples 11 to 15 were prepared. The pH was adjusted with citric acid and aqueous potassium hydroxide. Both are hypoallergenic and excellent in foaming power and cleaning power.

Example 11 (body shampoo, pH 6.5)
(weight%)
Lauryl phosphate K salt / Dilauryl phosphate K salt 65
(Monolauryl / Dilauryl = 95/5)
2-Ethylhexyl glyceryl ether 3
Lauric acid amidopropyl betaine solution (30%) 5
Fragrance 0.5
Purified water balance

Example 12 (body shampoo, pH 7.0)
(weight%)
Lauryl phosphate K salt / Dilauryl phosphate K salt 60
(Monolauryl / Dilauryl = 75/25)
Dipropylene glycol 9
Lauryl hydroxysulfobetaine solution (30%) 5
Fragrance 0.3
Purified water balance

Example 13 (body shampoo, pH 6.8)
(weight%)
Polyoxyethylene (1) lauryl phosphate K salt 60
/ Polyoxyethylene (1) dilauryl phosphate K salt (monolauryl form / dilauryl form = 85/15)
2-Ethylhexyl glyceryl ether 2
Dipropylene glycol 6
Lauric acid amidopropyl betaine solution (30%) 8
Fragrance 0.3
Purified water balance

Example 14 (face wash, pH 6.5)
(weight%)
Lauryl phosphate K salt / Dilauryl phosphate K salt 70
(Monolauryl / Dilauryl = 95/5)
2-Ethylhexyl glyceryl ether 3
Lauric acid amidopropyl betaine solution (30%) 5
Propylene glycol 10
Acrylic acid alkyl methacrylate copolymer 0.5
(Carbopol ETD2020; manufactured by Nikko Chemicals Co., Ltd.)
Fragrance 0.3
Purified water balance

Example 15 (shampoo, pH 6.0)
(weight%)
Lauryl phosphate K salt / Dilauryl phosphate K salt 60
(Monolauryl / Dilauryl = 75/25)
n-octyl glyceryl ether 3
Propylene glycol 10
Cationized cellulose (Poise C-80M; manufactured by Kao Corporation) 0.5
Fragrance 0.3
Purified water balance

Claims (4)

The following component (A) and component (B):
(A) (a1) A mixture of a phosphoric acid monoester represented by the general formula (1) and (a2) a phosphoric acid diester represented by the general formula (2), wherein the content ratio is ( Phosphate-based surfactant in which a1) / (a2) = 95 / 5-50 / 50:

(In the formula, R ¹ , R ² and R ³ each represent a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms, and X ¹ , X ² and Y ¹ are a hydrogen atom and an alkali metal atom, respectively. , An alkaline earth metal atom, a basic amino acid residue, an alkanolamine or ammonium, and the average number of added moles k, m and n are each 0 to 10);
(B) A detergent composition containing a glyceryl ether having a linear or branched alkyl group or alkenyl group having 4 to 12 carbon atoms, wherein the content of component (A) is more than 60% by weight. Next component (A) and component (C):
(A) (a1) A mixture of a phosphoric acid monoester represented by the general formula (1) and (a2) a phosphoric acid diester represented by the general formula (2), wherein the content ratio is ( Phosphate-based surfactant in which a1) / (a2) = 95 / 5-50 / 50:

(In the formula, R ¹ , R ² and R ³ each represent a linear or branched alkyl group or alkenyl group having 8 to 18 carbon atoms, and X ¹ , X ² and Y ¹ are a hydrogen atom and an alkali metal atom, respectively. , An alkaline earth metal atom, a basic amino acid residue, an alkanolamine or ammonium, and the average number of added moles k, m and n are each 0 to 10);
(C) A detergent composition containing a polyhydric alcohol, wherein the content of component (A) is 50% by weight or more, and the content of component (C) is 0.1 to 25% by weight.   Furthermore, the cleaning composition of Claim 2 containing 1 or more types of glyceryl ether which has a component (B) C4-C12 linear or branched alkyl group or alkenyl group.   The cleaning composition according to claim 2 or 3, wherein the component (C) is one or more selected from ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, diglycerin, and triglycerin.