JP2007031632A - Detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition with an excellent conditioning effect, a sufficient frothing property and a low skin irritability. <P>SOLUTION: The detergent composition is composed of a copolymer of 2-[(meth)acroyloxy]ethyl-2-(trimethylammonio)ethyl phosphate, 2-hydroxy-3-methacryloyloxypropylmethylammonium chloride, and a sericin with a molecular weight of 300-100,000 and an anionic surfactant, which surfactant is preferably sodium lauroylmethyl-β-alanine. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cleaning composition that has an excellent conditioning effect, has sufficient foaming power, and has little skin irritation.

  Detergents are required to have detergency and good foaming. At the same time, in recent years, consumers' awareness of care has increased, and in addition to basic performance as a cleaning agent, there is a tendency to require a feeling of use during cleaning, a good feeling after finishing, and a conditioning effect. In addition, as the frequency of use of the cleaning agent increases, there is a demand for a product that has little irritation to the skin and does not cause the washing to stick out.

Conventionally, as a conditioning agent for a cleaning agent, a cationized polymer, a high molecular silicone, a protein, an amino acid, or the like is blended (see, for example, Patent Documents 1 to 3). However, it is not yet satisfactory in terms of the feeling of use and finish during washing. In addition, amino acid-based detergents such as acyl sarcosine salts, acylmethyl-β-alanine salts, and acyl glutamine salts are used as mild detergents, but these detergents have low foaming power and are squeaky. Since it has a feeling, a preferable feeling of use could not be obtained.

  A 2-methacryloyloxyethyl phosphorylcholine monomer and a polymer obtained by polymerizing the monomer are already known (see, for example, Patent Document 4). Moreover, since this polymer is modeled on a biological membrane, it is disclosed that it is excellent in biocompatibility and can provide a cosmetic excellent in moisture absorption and skin roughening effect (see, for example, Patent Document 5). However, since these polymers are water-soluble, when blended with a cleaning agent, most of the polymers are washed away, and a sufficient effect cannot be obtained.

Japanese Patent No. 3064037 JP-A 63-45213 JP 2000-319140 A JP-A-3-39309 JP 2000-26249 A

  In the above circumstances, a technique for eliminating the above-described drawbacks has been demanded. That is, an object of the present invention is to provide a cleaning composition that is excellent in conditioning effect, has sufficient foaming power, and has little skin irritation.

  As a result of diligent research in view of the above circumstances, the present inventors have found that a detergent composition containing a specific polymer, a specific protein, and a surfactant can achieve the above object, and has completed the present invention. . That is, the present invention relates to a copolymer of 2-[(meth) acryloyloxy] ethyl-2- (trimethylammonio) ethyl phosphate and 2-hydroxy3-methacryloyloxypropylmethylammonium chloride, and sericin having a molecular weight of 300 to 100,000. And a detergent composition containing an anionic surfactant. Furthermore, in this detergent composition, the anionic surfactant is preferably sodium lauroylmethyl-β-alanine.

  INDUSTRIAL APPLICATION This invention can provide the cleaning composition which is excellent in the conditioning effect, has sufficient foaming power, and has little skin irritation.

  As a copolymer of 2-[(meth) acryloyloxy] ethyl-2- (trimethylammonio) ethyl phosphate and 2-hydroxy3-methacryloyloxypropylmethylammonium chloride used in the present invention, for example, sales of Lipidure C There are those marketed by Nippon Oil & Fat Co., Ltd. by name. The blending amount of the polymer is preferably 0.001% to 1% by mass (hereinafter simply referred to as%), more preferably 0.01 to 0.5%, based on the entire composition. If it is less than 0.001%, a sufficient conditioning effect cannot be seen, and if it exceeds 1%, the hair after washing has become stiff and a sufficient foaming power cannot be obtained.

  The sericin used in the present invention may remain separated by extraction or the like, but may be hydrolyzed by acid, alkali or enzyme. Its molecular weight is from 300 to 100,000. When the molecular weight is less than 300, it may be difficult to exert a sufficient effect. When the molecular weight is greater than 100,000, a feeling of after-treatment such as stickiness after washing may be felt. Although the compounding quantity of sericin is not specifically limited, 0.001-1% is preferable with respect to the whole composition.

  The anionic surfactant used in the present invention is not particularly limited. For example, fatty acid soap, ether carboxylate, N-acyl sarcosine salt, N-acyl glutamate, α-olefin sulfonate, alkyl Examples thereof include ether sulfate, alkyl phosphate, and alkyl ether phosphate. These anionic surfactants can be appropriately selected, and one or more can be used. Among these, N-acyl-β-alanine salts are preferable, and among them, lauroylmethyl-β-alanine sodium is particularly preferable in terms of foaming power and feeling of use. Although the compounding quantity of these anionic surfactants is not specifically limited, 1-20% is preferable with respect to the whole composition, More preferably, it is 5-15%.

  In addition to the components described above, the components that are usually used in the cleaning composition can be appropriately blended with the cleaning composition of the present invention within the range achieved by the present invention. Examples of these components include nonionic surfactants, amphoteric surfactants, cationic surfactants, humectants, cationic polymers, silicone derivatives, oils, plant extracts, viscosity modifiers, pearling agents, drugs, Preservatives, chelating agents, antioxidants, pH adjusting agents, pigments, fragrances and the like can be mentioned.

  The cleaning composition of the present invention can be used for hair shampoos, body shampoos, hand soaps, facial cleansers, etc., regardless of the subject or dosage form.

  The present invention will be described in detail based on examples, but the present invention is not limited thereto. Prior to the examples, test methods and evaluation methods employed in each example will be described.

-Usability test method during shampooing A panel of 10 people washes with the samples of each example (hereinafter simply referred to as "samples"), and "good" with respect to the feeling of use such as the presence of finger squeezing and hair squeaking during shampooing , “Normal” and “Bad”, and the determination result was determined by the number of people who answered “Good”.

Judgment criteria are as follows.
◎: Very good The number of test subjects who answered “good” is 8 or more ○: Excellent The number of test subjects who answered “good” is 6 or more and less than 8 △: Inferior The number of test subjects who answered “good” is 4 or more and less than 6 ×: very poor The number of test subjects who answered “good” is less than 4

-Hair finish feeling test method after hair washing and drying 10 panels wash hair with samples, and the hair feels moist, soft and supple after hair washing and drying, "good", "normal", "bad" The determination was made based on the number of people who answered “good”.

Judgment criteria are as follows.
◎: Very good The number of test subjects who answered “good” is 8 or more ○: Excellent The number of test subjects who answered “good” is 6 or more and less than 8 △: Inferior The number of test subjects who answered “good” is 4 or more and less than 6 ×: very poor The number of test subjects who answered “good” is less than 4

-Foaming test method An aqueous solution (using CaCO 350 ppm artificial hard water, 40 ° C) having an activator concentration of 2% was prepared, and the test was performed according to the Ross Miles test method.

Judgment criteria are as follows.
◎: Excellent foaming Foam height of 250 mm or more ○: Foaming good Foam height of 210 mm or more and less than 250 mm △: Foaming normal Foam height of 170 mm or more and less than 210 mm ×: Poor foaming Foam height of less than 170 mm

・ Skin irritation test method (safety test)
(1) Skin irritation (protein denaturation rate) test method The ovalbumin denaturation rate when the sample was added to the ovalbumin PH7 buffer solution to a sample concentration of 1% using aqueous high performance liquid chromatography. The absorption peak at 220 nm was measured and calculated using Equation (1).
[Equation 1]
Denaturation rate (%) = Ho−Hs / Ho × 100 (1)
Ho: Height of the 220 nm absorption peak of ovalbumin Hs: Height of the 220 nm absorption peak when the sample was added to the ovalbumin buffer solution Further, the evaluation criteria were set as follows.
◎ ... ovalbumin denaturation rate less than 30% o ... ovalbumin denaturation rate 30% or more and less than 60% Δ ... ovalbumin denaturation rate 60% or more but less than 80% × ... ovalbumin denaturation rate 80% or more

Examples 1-6 and Comparative Examples 1-4 (hair shampoo)
The shampoos according to the composition shown in Table 1 were prepared by a conventional method, and the feeling of use during the hair washing, the finished feeling after the hair was dried, the foaming property, and the skin irritation were examined. The results are shown in Table 1.

  As is clear from Table 1, the cleaning composition according to the present invention exhibited superior performance as compared with the composition of the comparative example.

Example 7 Hair Shampoo Polyoxyethylene (2) Sodium Lauryl Ether Sulfate 40.0
Lauroylmethyl-β-alanine sodium 5.0
Palm oil fatty acid monoethanolamide 1.0
Coconut oil fatty acid amidopropylbedine 10.0
Cationized cellulose derivative 0.3
(Product name: Kachinar HC-200 [manufactured by Toho Chemical Industry Co., Ltd.])
O- [2-hydroxy-3- (trimethylammonio) chloride
Propyl] guar gum 0.1
POE (10) POP (2) Palm oil fatty acid glyceryl 2.0
Polymeric silicone aqueous emulsion 1.5
(Product name: Silicon KM-906 [Shin-Etsu Chemical Co., Ltd.])
Ethylene glycol distearate 2.0
Lipidure-C 0.05
Sericin 0.5
Hydrolyzed wheat 0.05
(Product name: GLUADIN W20 (manufactured by Cognis Japan))
Citric acid 0.1
Sodium benzoate 0.3
EDTA 0.1
Fragrance 0.5
Purified water balance

  A shampoo having the above composition was prepared by a conventional method, and the feeling of use during shampooing, the feeling of finishing after drying the shampoo, foaming and skin irritation were evaluated. All the characteristics were excellent and good results were obtained.

Example 8 Body Shampoo Potassium Laurate 10.0
Potassium myristate 4.0
Potassium palmitate 6.0
Lauroylmethyl-β-alanine sodium 5.0
Lauryl sulfate triethanolamine 4.0
2-Alkyl-N-carboxymethyl-N-hydroxy ethylimidazolinium bedain 2.0
Coconut oil fatty acid amidopropyl bedain 2.0
Ethylene glycol distearate 2.0
Hydroxypropyl methylcellulose 0.3
Concentrated glycerin 1.0
Propylene glycol 5.0
Palm oil fatty acid monoethanolamide 1.0
Lipidure C 0.5
Sericin 0.05
Peach leaf extract 1.0
EDTA 0.1
Fragrance 0.5
Purified water balance

  When a body shampoo having the above composition was prepared by a conventional method and the feeling of use, foaming properties and skin irritation were evaluated, all the properties were excellent and good results were obtained.

  According to the present invention, it is possible to provide a cleaning composition that is excellent in conditioning effect, has sufficient foaming power, and has little skin irritation.

Claims (2)

Copolymer of 2-[(meth) acryloyloxy] ethyl-2- (trimethylammonio) ethyl phosphate and 2-hydroxy3-methacryloyloxypropylmethylammonium chloride, sericin having a molecular weight of 300 to 100,000, and an anionic surfactant A cleaning composition comprising: The detergent composition according to claim 1, wherein the anionic surfactant is sodium lauroylmethyl-β-alanine.