CN1184418A - Aqueous liquid cleansing composition containing fatty acid soaps - Google Patents

Abstract

An aqueous liquid cleansing composition comprising (a) at least one short chain C6-C10 fatty acid soap in combination with (b) at least one long chain C14-C22 fatty acid soap where the weight ration of (a) to (b) is within the range 1:20 to 5:1, and in which any C12 fatty acid soap is only present in low levels, is mild and provides good lather in use.

Description

The aqueous liquid cleansing composition that contains fatty acid soaps

The present invention relates to contain the aqueous liquid cleansing composition of special fatty acid soap.Particularly, it relate to be suitable for cleaning human skin and hair, contain compositions in conjunction with some long-chains and short-chain fatty acid soap.This compositions also can provide good foam except that mildness.

Traditionally, moisture cleaning combination is to classify according to the foamy amount that is produced in their uses; Those can provide the excellent product that is considered to of maximum foam volume.Yet, confirmed recently to provide to demonstrate good formation foam/foam, be gentle product to washing hair and skin simultaneously.

Preparing the subject matter that such product runs into is that these two kinds of character trend towards objectionable intermingling.Promptly highly the surfactant of foaming generally is very irritating, and gentle surfactant then trends towards and can not bubble fully.

In the past, having made efforts in fancy soap soap bar field overcomes these problems, for example, by being described in the system among the GB1295275, comprises forming a kind of Adeps Bovis seu Bubali soap that contains in conjunction with C ₆-C ₁₀Uncle or secondary straight-chain alkyl sulfate and C ₁₀-C ₂₄The product of fatty acid soaps overcomes these problems.

Have now found that, can show good foam and be that gentle liquid cleaning compositions can form in conjunction with long-chain fatty acid soap by using short-chain fatty acid soap.Be that short-chain fatty acid soap does not demonstrate effective foaming foam character when itself using separately, but can improve the foam performance of long-chain fatty acid soap astoundingly.

Therefore, the invention provides a kind of aqueous liquid cleansing composition, it comprises:

(a) at least a C that is selected from ₆To C ₁₀The short-chain fatty acid soap of fatty acid soaps;

(b) at least a C that is selected from ₁₄To C ₂₂The long-chain fatty acid soap of fatty acid soaps; And

(c) water; Wherein compositions comprises the C that calculates no more than 3 weight % based on moisture cleaning combination ₁₂Fatty acid soaps calculates the C of no more than 15 weight % based on total fatty acid soaps ₁₂Fatty acid soaps, and (a) to the weight rate of (b) in 1: 20 to 5: 1 scope.

Preferably (a): weight rate (b) is in 1: 20 to 1: 1 scope.

Short-chain fatty acid soap is preferred, for example, and from animal or plant origin is derived and the sodium salt of a kind of fatty acid of obtaining by the distilled fatty acid approach or the ammonium ion (for example triethanolamine) of potassium salt or a kind of replacement.Preferably short-chain fatty acid soap is C ₆-C ₈Fatty acid soaps, most preferably C ₈Fatty acid soaps.

Long-chain fatty acid soap is preferred, for example, and from animal or plant origin is derived and the sodium salt of a kind of fatty acid of obtaining by the distilled fatty acid approach or the ammonium ion (for example triethanolamine) of potassium salt or a kind of replacement.Preferably long-chain fatty acid soap is C ₁₄Or C _{18: 1}(be C ₁₈Monounsaturated) fatty acid soaps.

The total amount that is present in the fatty acid soaps in the compositions preferably in 1 to 40 weight % scope, preferred 5 to 30 weight %.

In the most preferred embodiment of the present invention, short-chain fatty acid soap is a kind of C ₈Material and long-chain fatty acid soap are a kind of C ₁₄Or C _{18: 1}Material.This chain mixed system is not only than based on C ₁₂The compositions milder of fatty acid soaps, and demonstrate the comparable performance that spumes.Calculate no more than 3 weight %, preferred no more than 2 weight % based on total composition, calculate the C of the low concentration of no more than 15 weight % based on total fatty acids soap ₁₂Fatty acid soaps can be added in the blended soap system.Under this tittle, C ₁₂The existence of fatty acid soaps may improve the foam performance of compositions, and does not have adverse effect for the mildness of compositions.

Preferred compositions of the present invention also contains cosurfactant.This cosurfactant can be selected from and be suitable for any known surfactant that the part is used for human body, can be selected from the surfactant of anionic property, nonionic, zwitterionic and cationic and their mixture.Gentle surfactant promptly can not injure horny layer, and outer field those surfactants of skin are particularly preferred.

The cosurfactant of preferred anionic surfactants comprises fatty acyl group isethionate, alkyl ether sulfate, alkyl glycerol ether sulfate, sulfosuccinate, taurate, sarcosinate, sulfosalicylic acetate, alkylphosphonic, alkylphosphonate, acyl-lactate, alkyl-glutamic acid salt and their mixture.

Generally should avoid using irritating surfactant such as uncle's alkane sulfonate or alkylbenzenesulfonate.

Suitable ionic surfactant pack is drawn together alkyl polysaccharide, lactobiose acid amide, ethylene glycol esters, glycerol monoethers class, polyhydroxy amides class (glucamide), primary alconol and secondary alcohol ethoxyl compound, and particularly every mol of alcohol is on average used the C of 1 to 20 moles of ethylene oxide ethoxylation _8-20Aliphatic alcohols.

Preferred amphoteric detergent has those alkyl that contain 7 to 18 carbon atoms or alkenyl also to observe the detergent of following overall structure formula:

R wherein ¹Be alkyl or the alkenyl that contains 7 to 18 carbon atoms; R ²And R ³Be alkyl, hydroxy alkyl or the carboxyalkyl that contains 1 to 3 carbon atom independently of one another;

The m value is 2 to 4

The n value is 0 or 1

X contains 1 to 3 carbon atom, and randomly by alkylidene that hydroxyl replaced and

Y is-CO ₂ ^-Or-SO ₃ ^-

Amphoteric detergent in above-mentioned general formula comprises the common betaine with following formula:

And acylamino-betaine with following formula:

Wherein the m value is 2 or 3.R in two general formulas ¹, R ²And R ³Definition identical with the front.Particularly, R ¹Can be C by coconut derived ₁₂And C ₁₄The mixture of alkyl group makes at least half, preferably 3/4 R ¹Group contains 10 to 14 carbon atoms.R ²And R ³Methyl preferably.

Further probability is the sulfo group betaine with following formula: Perhaps:

Wherein the m value is 2 or 3, the perhaps variant of these chemical compounds, wherein-(CH ₂) ₃SO ₃ ^-Replaced by following groups:

R in above-mentioned these formulas ¹, R ²And R ³Definition identical with the front.

Compositions of the present invention can comprise a kind of structure agent, and promptly a kind of being added into is used for being increased in low-shearing force such as being lower than 1s ^-1The time the material of viscosity.Suitable material comprises swelling clay, for example synthetic hectorite; Fatty acid and derivant thereof and, particularly, crosslinked polyacrylate such as the Carbopol (TM) of glycerine monofatty ester Polyethylene Glycol ethers (polymer that can obtain from Goodrich); Esters of acrylic acid and copolymer thereof; Polyvinyl pyrrolidone and copolymer thereof; The polyethyleneimine: amine; Salt such as sodium chloride and ammonium sulfate; Sucrose ester; Gellant; And their mixture.

In clay, particularly preferably be synthetic hectorite (laponite) clay that is used in combination with a kind of electrolytic salt that can make the clay thickening.Suitable electrolyte comprises alkali and alkaline earth salt such as halogenide, ammonium salt and sulfate.

Also a kind of thickening agent can be comprised according to compositions of the present invention, a kind of material of the viscosity of compositions can be kept when promptly in use its shear rate increases.Suitable material comprises crosslinked polyacrylate such as Carbopol (TM) (polymer that can obtain from Goodrich); Fatty acid and derivant thereof, and glycerine monofatty ester Polyethylene Glycol ethers particularly; Natural natural gum comprises alginate, guar gum; Xanthan and polysaccharide derivates comprise hydroxy ethyl cellulose, carboxymethyl cellulose and hydroxypropyl guar gum; Propandiols and propylene glycol oleic acid esters; Salt such as sodium chloride and ammonium sulfate; Glycerol Adeps Bovis seu Bubali acid esters; And their mixture.

The further example of structure agent and thickening agent is found in " international cosmetic composition dictionary " (International Cosmetic Ingredient Dictionary) the 5th edition, CTFA (The Cosmetic, Toiletry in 1993; Fragrance Association) publishes, be hereby incorporated by.

The example that can be added into other adjuvant in the present composition comprises that opacifier, antiseptic are such as parabens; Biocide such as antioxidant such as butylated hydroxytoluene (toulene); Antibacterial; Wetting agent such as glycerol and sorbitol; Wax; Plant extract is such as Aloe Vera, Radix Hamamelidis Mollis and Fols sambuci williamsii; Coloring agent and spice.

For the compositions of the present invention of washed skin can be mixed with, for example, bathe with or the shower gel; Wash one's hands and use compositions; Wash one's face and use compositions; The product used before shaving and after shaving; And rinsing and clean the skin-protection product of skin.

Compositions of the present invention generally is transfusible liquid or semiliquid, and pasty state for example, and preferably have the viscosities il of 100 to 100,000 mpas, this viscosity number are to be 10s with Haake Rotoviscometer RV20 type viscometer in shear rate ^-1With record under 25 ℃ the condition.

The present invention will be further described by following non-limiting example.

Embodiment

In these embodiments

1. all fatty acids are the product of the purity of buying from Aldrich company about 99.5%.

2. betaine is to disperse thing from the cocos nucifera oil acyl aminopropyl betaine BDF-H30% that Nippon Oils and Fats company buys.

Embodiment 1-3

Checked the influence of chain length in these embodiments to foaming properties.Following preparation prepares by fatty acid is fused together.Slowly add potassium hydroxide then, present in an amount at least sufficient to these acids that fully neutralize.Continue to stir till the mixture that obtains is uniform.Table A

Embodiment	Quality/gram
						????KOH	????C 8	????C 14	Water
????1	????5.61	????4.81	????7.61	Under 25 ℃, add to 500ml
					????2	????5.61	????7.21	????11.42
????3	????5.61	????9.61	????15.23

Table B

For embodiment relatively	Quality/gram
					????KOH	Fatty acid	Water
????A	????5.61	??14.42	Under 25 ℃, add to 500ml
				????B	????5.61	??17.22	Under 25 ℃, add to 500ml
????C	????5.61	??20.04	Under 25 ℃, add to 500ml
				????D	????5.61	??22.84	Under 25 ℃, add to 500ml

The foam performance of various compositionss is to be assessed by 20 people's panel.Every group member puts on and has soaped all talcous surgical gloves in advance.

The compositions of 2.5 milliliters of tests is applied directly on the exsiccant glove, and the panelist rubs his or her both hands to produce foam together.Foam volume is to measure below the graduated collection funnel by panelist's both hands are immersed in.

The result who obtains is listed among the table C, wherein carries out with single chain length soap for embodiment A, B, C and D relatively.Table C

Embodiment	Average chain length	Foam volume/milliliter
			????1	????10	????45.3
????2	????11	????46.2
			????3	????12	????47.6
????A	????8	????0
			????B	????10	????0
????C	????12	????39.8
			????D	????14	????30.7

Result's demonstration only contains C ₁₂The preparation of soap (Embodiment C) is for forming the maximum system of foam in the preparation relatively.Embodiment D (C ₁₄Soap) form foam and obviously be less than C ₁₂System, and C ₈And C ₁₀(embodiment A and B) do not produce foam.C ₈/ C ₁₄Mixture produces volume of foam than pure C ₁₂System also will be got well.This result confirms C ₈Soap has promoted C ₁₄The frothing capacity of soap system.

Embodiment 4

Be to test in this embodiment with the product of full preparation.

Following series preparation is fused together fatty acid and prepares.Slowly add then in the potassium hydroxide and carboxylic acid 97%.Continue to stir up to the mixture that obtains become homogeneous till.Under agitation in soap solution, add betaine then.Containing the preparation of sodium chloride for those, can make sodium chloride in distilled water 25% solution adding, also can add by crystal, either way is that sodium chloride is stirred in the hot solution up to dissolving and fully mixing fully.Adding entry then makes mixture have correct concentration.Table D

	Embodiment 4	Embodiment E	Embodiment F
				Sad	????1.70	????-	????-
Lauric acid	????-	????-	????6.80
				Myristic acid	????8.50	????10.20	????3.40
Oleic acid	????6.80	????6.80	????6.80
				Betaine	????5.00	????5.00	????5.00
????KOH	????3.99	????3.75	????3.98
				????NaCl	????1.50	????-	????1.00
Water adds to 100%

Wherein E and F are for embodiment relatively.

The frothing capacity of these preparations is that usefulness is measured with the identical method described in the embodiment 1 to 3, and difference is that 0.5 gram test product is applied on the glove.

Obtain following result: table E

Embodiment	Foam volume/milliliter
		????4	????66.6
????E	????49.3
		????F	????56.1

This result confirms to comprise C in preparation ₈The benefit of fatty acid soaps aspect the formation of enhancement foam.

Embodiment 5-6

Two kinds of preparations of the present invention and a kind of C that do not contain in this embodiment ₈The preparation (the foregoing description F) for comparing of component is used to washed skin (preparation completely given below).Preparation 5 and 6 viscosity are regulated with sodium chloride, and the viscosity that makes them is to similar for the viscosity of embodiment F relatively.Table F

	Embodiment 5	Embodiment 6	Embodiment F
				Sad	????1.70	????1.53	????-
Lauric acid	????-	????1.00	????6.80
				Myristic acid	????8.50	????7.66	????3.40
Oleic acid	????6.80	????6?80	????6.80
				Betaine	????5.00	????5.00	????5.00
????KOH	????3.99	????4.00	????3.98
				????NaCl	????1.70	????1.70	????1.00
Water adds to 100%

The test product is to assess with the retardance design in the standardized deflection decantation test to the gentle character of skin.This deflection decantation test method comprises the fossa cubitalis (flexion zones of elbow) three each washings of one minute every day.This method is that design is used for distinguishing the method for a kind of " the extraordinary use " of very gentle product.Erythematous response only has slight variation with the fluctuating of temperature and humidity, makes this scheme be suitable for the test in the whole year.

With about 25 group members.Every group member's flexion zones necessarily can not suffer from any dermatosis symptom (eczema, drying, by stimulation, incised wound or galling etc.).Anyly antihistamine drug, anti-inflammation drugs (weekly more than 8 times) have been taken or people local regularly, oral or that injected cortisone all should be excluded outside this research work.Three kinds of test products are assigned on the washing position (left arm or right arm) with a kind of block design.

According to appraisal procedure, the member of guidance group bedews the flexion zones and a sponge on the left side.Then 0.5 gram product is coated on the sponge and the sponge of " executing medicine " and is placed in group member's the right hand.The group member washed left side flexion zones just in time one minute then.Flexion zones is subsequently by rinsing with pat dry.This washing process repeats with suitable compositions at right arm.Like this, two arms are promptly tested simultaneously.Repeat to give a baby a bath on the third day after its birth inferior every day with this washing methods, washed continuously five days, washes altogether 15 times.Processing time is arranged to 1.5 hours at interval.Each test position was assessed before just washing and after the washing for the third time of every day in 4 hours.

Trained evaluator's evaluation test position amounts to 20 times.Grade scale is as follows:

0-there is not an erythema

0.5-the erythema that can aware is only arranged

1-weak point-like erythema/do not have edema

1.5-it is weak/moderate erythema/as to be with or without edema

Handle with preceding method at the erythema that 2-moderate is converged/be with or without edema or each test position of blistering, and up to reaching grade " 2 " or bigger grade, has perhaps finished 15 washings.When arriving grade " 2 " or bigger scoring, terminate in the processing at this deflection position.Assess by all remaining then and calculate last scoring.Washing is continued at all the other deflection positions, and up to the grade that reaches at least " 2 " or reached 15 processing, no matter any situation reaches is earlier promptly ended to wash.Embodiment 5 and 6 and for embodiment F relatively in, the final scoring of 5 days reaction of accumulative total is the summation of 20 evaluation grades scorings of every group member, the meansigma methods of trying to achieve in all group members' scoring.Average score should be in 0 to 30 scope like this, in theory; Lower scoring shows does not definitely have skin irritation, 30 is the most serious and mark.

The result who obtains is as shown in the table: table G

Embodiment	5 days reaction of accumulative total
		????5	????8.51
????6	????9.04
		????F	????15.60

The result shows, compositions of the present invention significantly than for relatively do not contain C ₈Fatty acid soaps and containing greater than 3 weight %C ₁₂It is much gentle that the embodiment of fatty acid soaps wants.The result also shows a small amount of (1%) C of adding ₁₂Fatty acid soaps does not have harmful effect for the zest of product.

Claims (7)

1. moisture cleaning combination, it contains:

(a) at least a C that is selected from ₆To C ₁₀The short-chain fatty acid soap of fatty acid soaps;

(b) at least a C that is selected from ₁₄To C ₂₂The long-chain fatty acid soap of fatty acid soaps; And

(c) water; Wherein compositions contains the C that is no more than 3 weight % based on moisture cleaning combination calculating ₁₂Fatty acid soaps calculates the C that is no more than 15 weight % based on total fatty acid soaps ₁₂Fatty acid soaps, and (a): weight rate (b) is in 1: 20 to 5: 1 scope.

2. cleaning combination according to claim 1, it also contains the cosurfactant that is selected from surfactant anionic, nonionic, cationic, amphoteric ion type and their mixture.

3. cleaning combination according to claim 2, wherein cosurfactant comprises the zwitterionic surfactant that is selected from alkyl betaine, acyl aminopropyl betaine, acyl aminopropyl sulfo group betaine and their mixture.

4. one kind according to any one cleaning combination in the claim 1 to 3, and wherein fatty acid soaps (a) is selected from C ₆To C ₈Fatty acid soaps and their mixture.

5. one kind according to any one cleaning combination in the claim 1 to 3, and wherein fatty acid soaps (b) is selected from C ₁₄To C _{18: 1}Fatty acid soaps and their mixture.

6. one kind according to any one cleaning combination in the claim 1 to 5, and it also contains a kind of thickening agent.

7. as a kind of aqueous liquid composition of human skin and hair abluent, it contains:

(a) at least a C that is selected from ₆To C ₁₀The short-chain fatty acid soap of fatty acid soaps;

(b) at least a C that is selected from ₁₄To C ₂₂The long-chain fatty acid soap of fatty acid soaps; With

(c) water; Wherein compositions contains the C that is no more than 3 weight % based on moisture cleaning combination calculating ₁₂Fatty acid soaps calculates the C that is no more than 15 weight % based on total fatty acid soaps ₁₂Fatty acid soaps, and (a): weight rate (b) is in 1: 20 to 5: 1 scope.