JPS59100199A - Detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cleaning composition that satisfies essential requirements for a cleaning agent such as foaming properties and cleansing properties, while successfully reducing irritation to the skin significantly. .

Traditionally, the surfactants used in shampoos, whether used by professionals such as those used in hair salons or commercially available products, have mainly been alkyl sulfate salts, polyoxyethylene alkyl sulfate salts, alkylbenzene sulfonate salts, α -Olefin sulfonates have been widely used.

However, although shampoos containing these surfactants have excellent cleaning power, they are all known to be highly irritating to the skin, albeit to varying degrees, and are not recommended by barbers and beauticians. Professionals who often come into contact with shampoo are more likely to develop skin problems such as rough hands.

Also, recently, young people who have a particularly developed sense of fashion wash their hair more often, but even the general public washes their hair less than 3 to 3 times.
The number of people washing their hair every day has increased to four times a week, and if they continue to wash their hair with shampoos that contain strong irritating surfactants, the scalp will become rough, leading to problems such as dandruff and itching. There is.

From these points, there is currently a strong demand for the use of shampoos with low skin irritation, not only for professional use but also for general commercial use.

The present inventors have focused on the above points and have conducted extensive research. As a result, surfactants and surfactant compositions with strong protein denaturing power have been found to cause severe roughness of hands when used repeatedly.
In contrast, surfactants and shampoo compositions with low protein denaturing power are less likely to cause skin disorders such as rough hands even after long-term use, and the occurrence of dandruff on the scalp is also significantly reduced. I discovered that.

That is, for various surfactants and mixed surfactant compositions, we measured the protein denaturation rate, conducted rough hand tests using actual human hands, and measured the amount of dandruff caused by actual use (prolonged use). The inventors discovered that surfactants and mixed surfactant compositions with low levels of dryness tend to cause less rough hands and a tendency to reduce the amount of dandruff, leading to the completion of the invention of the present cleaning composition.

That is, the present invention is based on the general formula (A) (wherein R1 is an alkyl group or alkenyl group having an average number of carbon atoms of 7 to 19, R2 is a lower alkyl group having an average of 1 to 3 carbon atoms, and M is an alkali metal or an organic represents an alkyl alkyl taurine salt type anionic surfactant represented by the general formula (B) (in which R3 is an alkyl group or alkenyl group having an average number of carbon atoms of 7 to 19, and R4 is hydrogen). atom or a lower alkyl group having an average of 1 to 3 carbon atoms, R5 and R6 are lower alkyl groups having an average of 1 to 3 carbon atoms, and m is an integer representing 1 to 4). a surfactant, - general formula (C) (wherein R7 represents an alkyl group or alkenyl group having an average number of carbon atoms of 7 to 19, m and n are integers, m+
n is 1 to 5. ) A detergent composition containing an alkylolamide type nonionic surfactant represented by the following as an active ingredient is provided.

The preferred blending ratio of the active ingredients is that the weight ratio of (A):(B) is 5:1 to 1:8, and (A)+(B):(C
) is in the range of 15:1 to 1:1, and (A
) + (B) + (C) is a proportion of 10 to 50 parts by weight of the total.

Although the alkyloyl alkyl taurine salt type anionic surfactant represented by the general formula (A) has sufficient surfactant properties such as foaming properties and detergent properties, it has a strong protein denaturing property, and when used alone. The desired mild cleaning agent cannot be obtained. On the other hand, the alkyloylamide betaine type amphoteric surfactant represented by the general formula (13) has low protein denaturation ability and weak irritation, but has poor surfactant properties such as foaming and detergent properties. Therefore, when used alone, there is a drawback that a cleaning agent with satisfactory performance cannot be obtained.

The present inventors have discovered an alkyl taurine salt type anionic surfactant represented by the general formula (A), and an alkyl taurate anionic surfactant represented by the general formula (A).
We discovered that when the alkyloylamide betaine type amphoteric surfactants represented by B) are mixed at a certain ratio, phenomena such as an increase in viscosity and a decrease in critical micelle concentration occur compared to the case of each alone. It was assumed that a complex of an ionic surfactant and an amphoteric surfactant was formed, but in this mixture at a certain ratio, surfactant abilities such as foaming properties and detergent properties are expressed by the general formula (A). The protein denaturation performance is said to be superior to that of the alkylyl alkyl taurine salt type anionic surfactant alone, and at the same time, the protein denaturation performance is superior to that of the alkylylamide betaine type amphoteric surfactant represented by the general formula (B) alone. It was discovered that the temperature was significantly reduced to a comparable level. In other words, by mixing to form a complex, a synergistic effect was clearly exerted, and it was possible to obtain a hypoallergenic surfactant composition with low protein denaturation ability while maintaining excellent surfactant ability. It is something. This (A
):(B) weight ratio ranges from 5:1 to 1:8. If the balance of the system is disrupted by using a mixing ratio outside this range or by adding a large amount of other anionic surfactants, etc., a sufficient effect of lowering protein denaturation performance cannot be obtained.

In addition, the alkylolamide type nonionic surfactant represented by the general formula (C) used in the present invention has been traditionally used in anionic surfactant shampoos to have a foaming enhancement effect, a thickening effect, and a low temperature effect. Although it is blended for the purpose of improving stability (lowering the Kraft point), etc., in the present invention, this (C
) was found to further reduce protein denaturation ability by blending them in a certain ratio. The preferred ratio of (A) + (B): (C) is 15:1 by weight.
or 1:1, and from this ratio (A) + (B
) If the content is too large, the protein denaturation property reducing effect of (C) will not be sufficiently exhibited, and if the content of (C) is too large, the detergency and foaming properties of the shampoo will be impaired. Also, (A)+
(B) + (C) is preferably 10 to 50 parts by weight of the total to form a liquid shampoo.

In the present invention, the alkylyl alkyl taurine salt type anionic surfactant represented by the general formula (A) includes, for example, C11H23CO-, as the alkylyl group R1CO-,
C13H27CO-, C15H31CO-, C17H3
5CO-, C17H33CO-, mixed alkylyl groups having 8 to 20 carbon atoms obtained from coconut oil fatty acids, etc., and the alkyl group R2 is CH3-, C2H5-, C3H7
-, and the counter ions M are -Li, -K, -Na
, monoethanolamine, diethanolamine, and triethanolamine.

In the alkylamide betaine type amphoteric surfactant represented by the general formula (B), for example, the alkyl group R3 is C7H15-, C9H17, C11H23-, C13
H27-, C15H31-, C17H35-, C17H
33-, C17H31-, C17H29-, a mixed alkyl group having 7 to 19 carbon atoms obtained from coconut oil, etc.
4 is -H, -CH3, etc., and R5 and R6 are -
Examples include CH3, -CH2CH3, -CH2CH2CH3, and the like.

- The alkylolamide type nonionic surfactant represented by the general formula (C) is, for example, an alkylyl group 1R7CO-
As, C11H23CO-, C13H27CO-,
C15H31CO-, C17H35CO-, C17H3
3CO-, carbon number 8 to 2 obtained from coconut oil fatty acid
0 mixed alkylyl groups, and the like.

The cleaning composition of the present invention may optionally contain components commonly added to cleaning agents, such as higher alcohols, lanolin derivatives, protein derivatives, oily components such as fatty acid esters of polyethylene glycol, propylene glycol, glycerin, Moisturizer ingredients such as polyethylene glycol, nonionic surfactants such as polyoxyethylene alkyl ether and polyethylene oxide polypropylene oxide block polymers, water-soluble polymer substances (including anionic, nonionic, and strongly thionic substances), It can contain sequestering agents, preservatives, bactericidal agents, pH adjusters, ultraviolet absorbers, antioxidants, pigments, fragrances, and the like.

Next, the present invention will be explained in detail with reference to Examples, but the present invention is not limited thereto.

Prior to the examples, the test methods and evaluation methods employed in each example will be explained.

Foaming test method: 400 ml of a 1% sample solution was prepared using artificial hard water containing 370 ppm of CaCO, and the amount of foaming was measured at a temperature of 40° C. using a cylindrical cylinder equipped with a stirrer.

○...Good foaming Foam volume 2,000ml or more △・
・・Normal foaming Foam volume 1,500ml or more 200
Less than 0ml ×...Poor foaming Foam volume 1,500ml
A sample concentration of 1% solution was prepared using CaO/MgO=3/1, 5° DH artificial hard water, and an artificial sebum-contaminated cloth was washed using wool surge.

Tergotometer (JIS K-
3371), and from the reflectance before and after cleaning,
The cleaning efficiency was determined.

Ro: Reflectance of the original cloth (wool surge) Rs: Reflectance of the contaminated cloth Rw: Reflectance of the contaminated cloth after washing ○... Good cleaning performance Cleaning efficiency 80% or more △... Normal cleaning performance Cleaning efficiency 60% or more, less than 80% ×...
Poor cleaning properties Cleaning efficiency Less than 60% Protein denaturation rate measurement method Using aqueous high performance liquid chromatography, when a sample is added to an egg albumin pH 7 buffer solution at a sample concentration of 1%, the ovalbumin denaturation rate is measured at 220 nm. It was measured using the absorption peak of

Ho Height of the 220 nm absorption peak of ovalbumin H
s 220 when the sample is added to the ovalbumin buffer solution
nm absorption peak height.

◎・・・Egg albumin denaturation rate less than 30% ○・・・Egg albumin denaturation rate 30% or more but less than 60% △・・・
Ovalbumin degeneration rate: 60% or more, less than 80%×・
... Ovalbumin denaturation rate 80% or more Rough hand test method For each sample, a panel of 10 people in total, 5 men and 5 men, was used to test either the left or right hand at a sample concentration of 5% and a temperature of 35°C.
An operation of immersing the other hand in an aqueous solution of 1 and the other hand in water at the same temperature for 10 minutes was performed twice a day for 2 consecutive days, and the difference in rough skin between the left and right hands was visually determined.

◎... Extremely weak hand roughness 0 to 1 out of 10 people Rough hands were observed on the sample side ○... Hand roughness was slightly weak
2-4 out of 10 people had rough hands on the sample side △...
・Slightly rough hands 5-7 out of 10 people Rough hands were observed on the sample side General commercial lauryl ether sulfate shampoo (does not contain drugs for dandruff itching)
A panel of people using the sample were asked to wash their hair five times using the sample using the same hair washing frequency and method as usual, and the amount of dandruff before and after using the sample was compared. The amount of dandruff on the third day after washing the hair with a commercially available shampoo and the amount of dandruff on the third day from the last day of washing the hair five times using the sample was measured.

Dandruff is collected by suction from the head using a suction device with a filter cloth,
In order to eliminate errors due to other foreign substances, the amount of nitrogen was determined by the Kjeldahl method, and this was multiplied by 6.25 to determine the average protein amount, which was defined as the amount of dandruff (mg/head).

The number of panels was three for each sample, and the average values were compared.

◎...The amount of dandruff has decreased by 30% or more after using the sample O...The amount of dandruff has decreased by 10% or more after using the sample
Less than 30% decrease △・・・After using the sample, the amount of dandruff decreased by 0% or more and less than 10%××
・Examples 1 to 8 where the amount of dandruff increased after using the sample A shampoo consisting of the formulation shown in Table 1 below was prepared, and its foaming property, detergency, protein denaturation rate, roughness on hands, and dandruff occurrence I checked the amount.

These results are shown in Table 1 (Example) and Table 2 (Comparative Example)
Shown below.

Thus, the examples of the present invention exhibited excellent performance in all of the foaming properties, cleansing properties, protein denaturation rate, roughness on hands, and amount of dandruff.

Claims (2)

[Claims] (1) General formula (A) (wherein R1 is an alkyl group or alkenyl group having an average number of carbon atoms of 7 to 19, R2 is an average number of carbon atoms of 1 to 3
The lower alkyl group represented by M represents an alkali metal or an organic amine. ) and an alkylyl alkyl curine salt type anionic surfactant represented by the general formula (E) (wherein R3 is an alkyl group or alkenyl group having an average carbon number of 7 to 19, R4 is a hydrogen atom or an average carbon atom an alkyloylamide betaine type amphoteric surfactant represented by a lower alkyl group of numbers 1 to 3, R5 and R6 are lower alkyl groups having an average number of carbon atoms of 1 to 3, and m is an integer representing 1 to 4; - General formula (C) (wherein R7 represents an alkyl group or alkenyl group having an average number of carbon atoms of 7 to 19, m and n are integers and m+n
is 1 to 5. ) A detergent composition containing an alkylolamide type nonionic surfactant represented by the following as an active ingredient. (2) The weight ratio of the alkylyl alkyl taurine salt type anionic surfactant represented by the general formula (A) and the alkylylamide betaine type amphoteric surfactant represented by the general formula (B) is 5:1 to 1: 8, and (A) + (
The weight ratio of E) and the alkylolamide type nonionic surfactant represented by the general formula (C) is in the range of 15:1 to 1:1, and (A) + (B) + (C) is the total amount of The detergent composition according to claim 1, in a proportion of 10 to 50 parts by weight.