CN109381363B - Amino acid shampoo and preparation method thereof - Google Patents

Abstract

The invention discloses amino acid shampoo which comprises the following components in percentage by weight: 2 to 30 percent of C14-16 olefin sodium sulfonate, 1 to 10 percent of decyl glucoside, 0.1 to 5 percent of cocamide MEA, 1 to 20 percent of methyl cocoyl sodium taurate, 1 to 30 percent of sodium lauroyl sarcosinate solution and 1 to 30 percent of cocamidopropyl betaine. According to the invention, through a large number of creative experimental researches, raw material selection and a formula in the amino acid shampoo are optimized, and the foaming agent components of the formula are matched and used according to a certain proportion, so that the prepared shampoo has good cleaning and dirt removing capabilities, is mild and non-irritant, has a softening effect on hair, has moderate viscosity, is rich, fine, smooth, stable and durable in foam, and is easy to wash clean.

Description

Amino acid shampoo and preparation method thereof

Technical Field

The invention relates to the technical field of daily chemical products, and particularly relates to amino acid shampoo and a preparation method thereof.

Background

Hair plays an important role in our daily lives as part of the body structure. Firstly, the hair has a direct protection effect on the scalp, and the external force acts on the scalp to play a role in buffering, reduce the injury and protect the head. Clinically, due to the existence of hair, except for hair dyes, foreign objects cannot directly contact the scalp, and contact with dust and bacteria is avoided, so that contact dermatitis of the scalp is less likely to occur than other parts. Meanwhile, the hair has very important aesthetic functions and unique and important psychosocial functions. According to the traditional Chinese medicine, the hair is considered to be surplus in blood, the kidney stores essence, the hair is bloomed, the growth of the hair depends on the nourishment of the essence and the blood, the thick and bright hair represents health, a good image can be given to people, the shape and the state of the hair are different, the impression of people is different, and the healthy and beautiful hair enables people to be more confident in interpersonal communication. Similarly, various hair diseases such as alopecia, lack of hair, dandruff, etc. can cause bad psychological symptoms such as self-inferior, anxiety, etc., and serious people even affect social activities, so that care of hair has to be paid attention in daily life.

The shampoo is also called shampoo, is a cosmetic washing product for washing hair, and belongs to one of the earliest and fastest-developing products in the personal care market. The development of the shampoo has a long history, people use soap to clean hair before 20 th century and 30 th century, and then liquid shampoo taking surfactant as a base material is disclosed, so that the hardness and water resistance and the mildness of the product are greatly improved. With the improvement of living standard and the rapid development of science and technology, people have higher and higher requirements on the safety of the surfactant of the shampoo. The amino acid surfactant is a protein-like mild surfactant, has low irritation, low toxicity, softness, good biodegradability, good affinity to human bodies and the like, meets various requirements of consumers, and draws more and more attention of people. In China, the research on the amino acid type surfactant is relatively late and laggard, and when the amino acid type surfactant is applied to cleaning products, the problem that the amino acid type surfactant is difficult to thicken and even cannot thicken, so that the amino acid type surfactant is difficult to apply is often caused. Therefore, the application rate of amino acid type surfactants in domestic hair products is not so high. At present, various manufacturers add various high molecular polymer thickening agents to solve the problem, but the foam property of the amino acid surfactant is inhibited, so that the application of the amino acid surfactant in hair products is limited.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an amino acid shampoo and a preparation method thereof. The amino acid shampoo disclosed by the invention is moderate in viscosity, rich in foam, mild, non-irritant, good in cleaning and anti-dandruff effects, and solves the technical problem that the existing amino acid hair product is difficult to thicken.

In order to realize the purpose, the invention adopts the technical scheme that:

an amino acid shampoo comprises the following components in percentage by weight: 2-30% of C14-16 olefin sodium sulfonate, 1-10% of decyl glucoside, 0.1-5% of cocamide MEA, 1-20% of methyl cocoyl sodium taurate, 1-30% of sodium lauroyl sarcosinate solution and 1-30% of cocamidopropyl betaine.

The C14-16 olefin sodium sulfonate has excellent wetting, decontaminating, emulsifying and foaming capabilities, stable foam, easy water solubility, good hard water resistance, good biodegradability, mild skin and good compatibility, and ensures that the product has rich and fine foam and is easy to rinse. The sodium C14-16 olefin sulfonate used in the invention has the trade name of AOS, and the manufacturer is Zhejiang light.

Decyl glucoside has good foaming ability and skin compatibility, mild property, biodegradability, fine foam, reduced irritation of irritant substances, and good thickening effect. The decyl glucoside used in the present invention is available under the trade name Plantacare 2000 UP, and the manufacturer is BASF.

The cocamide MEA has excellent thickening property and foam stability, low irritation, good cleaning capability and better moisturizing and conditioning capability. The cocamide MEA used in the present invention is sold under the trade name Comerlan 100C and manufactured by Kening.

Sodium methyl cocoyl taurate (also known as sodium cocoyl methyl taurate) is an anionic surfactant, has excellent washing, wetting, emulsifying and softening capabilities, and is rich, fine and stable in foam. The hair conditioner also has good detergency and emulsifying property, hard water resistance, acid and alkali resistance, good matching property with anionic, cationic, nonionic and other amphoteric surfactants, greenness, safety, easy biodegradation, mild property, hydrophilic amino acid structure, very small irritation to skin, soft feeling of hair after use, easy washing and no greasy feeling. The sodium methyl cocoyl taurate used in the invention is sold under the trade name Pureac WS Conc, and the manufacturer is Luoborun.

Sodium lauroyl sarcosinate has excellent foamability, fine and durable foam, better antibacterial and bactericidal properties, decontamination and antistatic capabilities, low toxicity, low irritation and moisturizing capabilities, good biodegradability, no environmental pollution and good compatibility, can enhance various functions when being compatible with other anionic surfactants and nonionic surfactants, cannot be excessively degreased after washing, and has good skin feel. The INCI name of the sodium lauroyl sarcosinate solution is 'water (and) sodium lauroyl sarcosinate', the content of the sodium lauroyl sarcosinate is 30%, the trade name of the sodium lauroyl sarcosinate solution is Ucefactant LS-30N, and a manufacturer is Guangzhou star science and technology Co., Ltd.

The cocamidopropyl betaine has excellent solubility, compatibility, foamability and thickening property, good hard water resistance, antistatic property and biodegradability, low irritation and bactericidal property, and can obviously improve the softness, conditioning and low-temperature stability of washing products by compatibility. The cocamidopropyl betaine used in the present invention is sold under the trade name Ucefactant CAB, and the manufacturer is Guangzhou Star science and technology Co.

According to the invention, a large number of creative experimental researches are carried out, the raw material selection and the formula in the amino acid shampoo are optimized, and the foaming agent components of the formula are matched and used according to the proportion of the formula, so that the prepared shampoo has good cleaning and decontaminating capability, is mild and non-irritant, has a softening effect on hair, has moderate viscosity, is rich, fine, stable and durable in foam, and is easy to wash clean.

Preferably, the amino acid shampoo comprises the following components in percentage by weight: 15% of C14-16 sodium olefin sulfonate, 8% of decyl glucoside, 1% of cocamide MEA, 10% of sodium methyl cocoyl taurate, 8% of sodium lauroyl sarcosinate solution and 20% of cocamidopropyl betaine. At this time, the amino acid shampoo has the best foam effect in terms of richness, fineness and stability.

Preferably, the amino acid shampoo further comprises the following components in percentage by weight: 0.01-1% of piroctone olamine salt and 0.05-2% of myristamidopropyl PG-dimethyl ammonium chloride phosphate.

The piroctone olamine salt has good dandruff removing effect and good fungus inhibiting effect, and the dandruff removing and itching relieving mechanism of the piroctone olamine salt is that an external channel generated by dandruff is fundamentally blocked through the sterilization and oxidation resistance, so that dandruff and itching are effectively and radically treated, and the dandruff is not temporarily eliminated in the aspect of degreasing and the like. The piroctone olamine salt used in the present invention is sold under the trade name Octopirox, and the manufacturer is CLARIANT (CLARIANT) of switzerland.

The myristamide propyl PG-dimethyl ammonium chloride phosphate has good conditioning performance and mild property, and can generate a synergistic effect with the piroctone olamine salt in the formula of the invention, so that the dandruff-removing and itching-relieving effects of the piroctone olamine salt are enhanced. The myristamidopropyl PG-dimethyl ammonium chloride phosphate used in the invention is sold as Arlasilk PTM, and the manufacturer is Dai.

Preferably, the mass ratio of the piroctone olamine salt to the myristamidopropyl PG-dimethyl ammonium chloride phosphate is as follows: piroctone olamine salt: myristamidopropyl PG-dimethylammonium chloride phosphate =1: 1. At the moment, the synergistic effect of the piroctone olamine salt and the myristamidopropyl PG-dimethyl ammonium chloride phosphate is most obvious, and the dandruff removing effect of the shampoo is best.

Preferably, the amino acid shampoo further comprises the following components in percentage by weight: 0.01% -2% of hydrolyzed corn starch solution. The INCI name of the hydrolyzed corn starch solution is "hydrolyzed corn starch (and) water", wherein the hydrolyzed corn starch content is 72%, which is sold under the trade name TETRUP-L (maltotetraose), and the manufacturer is Hayashibara, japan. The hydrolyzed corn starch solution has an effect of improving dry skin or skin with a frequently itching feeling, and can increase the moisture content of the horny layer.

Preferably, the amino acid shampoo further comprises the following components in percentage by weight: 70.1-5% of polyquaternium and 100.01-1% of polyquaternium.

Polyquaternium-7 (also known as dimethyl diallyl ammonium chloride-acrylamide copolymer) can be used for enhancing the compatibility and transparency of an anionic surfactant system, and the copolymer with extremely high adsorbability is particularly suitable for improving the dry and wet characteristics and the texture of a hair care product, so that the hair can be kept soft and moist in the using process, the moisture retention is high, and the skin tightness is reduced. The polyquaternium-7 used in the present invention is sold under the trade name Merquat 550 Polymer and manufactured by Luborun.

Polyquaternium-10 is a cationic cellulose polymer with excellent water solubility and adsorption capacity, can be compatible with anionic, cationic, nonionic and zwitterionic surfactants, has low irritation, and has unique cationic performance to repair damaged hair protein matrix, keep hair moist, and endow hair with excellent combing performance and bright and smooth feeling. The polyquaternium-10 used in the invention has the trade name JR-400, and the manufacturer is American Dow chemical.

Preferably, the polyquaternium-7: polyquaternium-10 =5: 1. Experiments show that when the polyquaternium-7 and the polyquaternium-10 are used together according to the proportion, the shampoo disclosed by the invention has better effects on repairing split hairs and improving damaged hair quality.

Preferably, the amino acid shampoo further comprises the following components in percentage by weight: 0.01-2% of PEG-60 almond glyceride and 0.01-3% of moisturizing and fatting agent; the moisturizing and fat-endowing agent is a mixture of coco glucoside and glycerol oleate.

PEG-60 amygdalin is a modified vegetable oil suitable for various care products, and is mainly characterized in that the amygdalin can be used as water-soluble emollient ester and solubilizer, and simultaneously, the amygdalin can obviously increase the mildness of anionic surfactant and zwitterionic surfactant. The PEG-60 amygdalin used in the invention has a trade name of Crovol A70, and the manufacturer is Dai.

The INCI name of the moisturizing and fat-liquoring agent is coco glucoside (and) glycerol oleate, the trade name is Lamesoft PO 65, and the manufacturer is Basff. The moisturizing and fatting agent plays a role in moisturizing and refreshing hair in the formula of the invention.

Preferably, the amino acid shampoo further comprises the following components: pH regulator, thickener and antiseptic. Preferably, the pH adjusting agent includes at least one of sodium citrate and citric acid. Preferably, the thickener comprises PEG-150 pentaerythritol tetrastearate. Preferably, the preservative comprises at least one of sodium benzoate, phenoxyethanol, and ethylhexyl glycerin. More preferably, the preservative comprises sodium benzoate, and a mixture of phenoxyethanol and ethylhexylglycerin. Preferably, the ratio by mass of sodium benzoate: the mixture of phenoxyethanol and ethylhexyl glycerol =1: 1. The INCI name of the mixture of phenoxyethanol and ethylhexyl glycerol is "phenoxyethanol (and) ethylhexyl glycerol", the trade name is Euxyl PE9010, and the manufacturer is sumei, germany.

Preferably, the amino acid shampoo is composed of the following components in parts by weight: 15% of C14-16 sodium olefin sulfonate, 8% of decyl glucoside, 1% of cocamide MEA, 10% of sodium methyl cocoyl taurate, 8% of sodium lauroyl sarcosinate solution, 20% of cocamidopropyl betaine, 0.3% of piroctone olamine, 0.3% of myristamidopropyl PG-dimethyl ammonium chloride phosphate, 0.3% of hydrolyzed corn starch solution, 72% of polyquaternium, 100.4% of polyquaternium, 0.5% of PEG-60 amygdalin, 1% of moisturizing and fat-liquoring agent, 0.1% of EDTA disodium, 0.4% of sodium citrate, 0.3% of citric acid, 0.3% of PEG-150 pentaerythritol tetrastearate, 0.5% of sodium benzoate, 0.5% of a mixture of phenoxyethanol and ethylhexyl glycerol, 0.5% of essence, and the balance of water.

Preferably, the preparation method of the amino acid shampoo comprises the following steps:

(1) adding EDTA disodium and part of water into an emulsifying pot, and heating to 85-90 ℃;

(2) dispersing polyquaternium-10 with the balance of water, then adding sodium citrate, stirring uniformly, and immediately adding into the emulsifying pot;

(3) adding C14-16 olefin sodium sulfonate, decyl glucoside, cocamide MEA, methyl cocoyl taurate, sodium lauroyl sarcosine solution, PEG-150 pentaerythritol tetrastearate, piroctone olamine, PEG-60 almond glyceride and a moisture-preserving fat-endowing agent into the emulsifying pot, stirring until the components are completely dissolved, preserving heat for 10-20 min, and then defoaming and cooling;

(4) cooling to 40-50 ℃, adding a hydrolyzed corn starch solution, cocamidopropyl betaine, myristamidopropyl PG-dimethyl ammonium chloride phosphate and polyquaternium-7, uniformly stirring, adding citric acid, and uniformly stirring;

(5) and finally, adding the mixture of sodium benzoate, phenoxyethanol and ethylhexyl glycerin and essence, and uniformly stirring to obtain the amino acid shampoo.

Compared with the prior art, the invention has the beneficial effects that: the amino acid shampoo prepared by the formula has the advantages of excellent capabilities of removing dandruff, relieving itching, cleaning and removing dirt, mild property, no irritation to skin, moderate viscosity, rich, fine, stable and lasting foam, easiness in washing, softness, moisture retention and refreshing feeling of hair after use, no sticky feeling and good repairing effect on damaged hair.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention is further illustrated by the following examples. It should be understood that the embodiments of the present invention are only for illustrating the technical effects of the present invention, and are not intended to limit the scope of the present invention. In the examples, the methods used were all conventional methods unless otherwise specified.

Examples

Examples 1-9 are examples of the amino acid shampoo of the present invention, and the formula thereof is shown in table 1.

In the examples: the sodium C14-16 olefin sulfonate is sold under the trade name AOS, and the manufacturer is Zhejiang light and medium. Decyl glucoside is available under the trade name Plantacare 2000 UP and from the manufacturer basf. The cocamide MEA was sold under the trade name Comerlan 100C and was manufactured by Kenin. Sodium methyl cocoyl taurate is sold under the trade name Pureal WS Con and manufactured by Loborun. The sodium lauroyl sarcosinate solution is sold as Ucefactant LS-30N, and the manufacturer is Guangzhou star science and technology company. The cocamidopropyl betaine is sold under the trade name Ucefactant CAB, and the manufacturer is Guangzhou star science and technology company. The piroctone olamine salt is sold under the trade name Octopirox and is manufactured by CLARIANT (CLARIANT) of switzerland. Myristamidopropyl PG-dimethylammonium chloride phosphate is sold under the tradename Arlasilk PTM and produced by Heda. The hydrolyzed corn starch solution is available under the trade name TETRUP-L (maltotetraose) and is manufactured by Hayashibara, Japan. Polyquaternium-7 is available under the trade name Merquat 550 Polymer and is manufactured by Luborun. Polyquaternium-10 is sold under the trade name JR-400 and is manufactured by Dow chemical in America. PEG-60 amygdalin is sold under the trade name of Crovol A70 and produced by Heda. Coco glucoside (and) glyceryl oleate is sold under the trade name Lamesoft PO 65 and manufactured by basf. Phenoxyethanol (and) ethylhexyl glycerol is sold under the trade name Euxyl PE9010, manufactured by Shumei Germany.

Table 1 amino acid shampoo formulations of examples 1-9 (weight%,)

Components	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7	Example 8	Example 9
										C14-16 sodium olefin sulfonate	15	15	15	15	15	15	15	15	30
Decyl glucoside	8	8	8	8	8	8	8	8	10
										Cocoamide MEA	1	1	1	1	1	1	1	1	5
Sodium methyl cocoyl taurate	10	10	10	10	10	10	10	10	20
										Sodium lauroyl sarcosinate solution	8	8	8	8	8	8	8	8	1
Cocoamidopropyl betaine	20	20	20	20	20	20	20	20	1
										Piroctone olamine salt	0.3	0.4	0.2	0.01	0.1	0.5	1	1	0.3
Myristamidopropyl PG-dimethyl ammonium chloride phosphate	0.3	0.2	0.4	0.05	0.1	0.5	1	2	0.3
										Hydrolyzed corn starch solution	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.01
Polyquaternium-7	2	2	2	2	2	2	2	2	5
										Polyquaternium-10	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.01
PEG-60 Almond glyceride	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.01
										Cococoglucoside (and) Glycerol oleate	1	1	1	1	1	1	1	1	3
EDTA disodium salt	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.01
										Citric acid sodium salt	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.4	0.05
Citric acid	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	1
										PEG-150 pentaerythritol tetrastearate	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.05
Sodium benzoate	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.1
										Phenoxyethanol (and) ethylhexyl glycerol	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	1
Essence	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.1
										Water (W)	Balance of	Balance of	Balance of	Balance of	Balance of	Balance of	Balance of	Balance of	Balance of

The preparation method of the amino acid shampoo in the embodiment 1 to 9 includes the following steps:

(1) adding disodium EDTA and part of water into an emulsifying pot, and heating to 85 ℃;

(2) dispersing polyquaternium-10 with the balance of water, then adding sodium citrate, stirring uniformly, and immediately adding into the emulsifying pot;

(3) adding C14-16 olefin sodium sulfonate, decyl glucoside, cocamide MEA, methyl cocoyl taurate, sodium lauroyl sarcosine solution, PEG-150 pentaerythritol tetrastearate, piroctone olamine, PEG-60 amygdalin and coco glucoside (and) glyceryl oleate into the emulsifying pot, stirring to completely dissolve, keeping the temperature for 15 min, defoaming, and cooling;

(4) cooling to 45 deg.C, adding hydrolyzed corn starch solution, cocamidopropyl betaine, myristamidopropyl PG-dimethyl ammonium chloride phosphate and polyquaternium-7, stirring, adding citric acid, and stirring;

(5) and finally, adding sodium benzoate, phenoxyethanol (and) ethylhexyl glycerol and essence, and uniformly stirring to obtain the amino acid shampoo.

The weight percentage formulation of the amino acid shampoo of comparative examples 1-5 is shown in table 2.

Table 2 amino acid shampoo formulations of comparative examples 1 to 5 (weight%,)

Components	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4	Comparative example 5
						C14-16 sodium olefin sulfonate	15	15	50	12	4
Decyl glucoside	8	8	4	10	2
						Cocoamide MEA	1	1	2	10	2
Sodium methyl cocoyl taurate	10	10	2	10	2
						Sodium lauroyl sarcosinate solution	8	8	2	10	2
Cocoamidopropyl betaine	20	20	2	10	50
						Piroctone olamine salt	0	0.3	0.3	0.3	0.3
Myristamidopropyl PG-dimethyl ammonium chloride phosphate	0.3	0	0.3	0.3	0.3
						Hydrolyzed corn starch solution	0.3	0.3	0.3	0.3	0.3
Polyquaternium-7	2	2	2	2	2
						Polyquaternium-10	0.4	0.4	0.4	0.4	0.4
PEG-60 Almond glyceride	0.5	0.5	0.5	0.5	0.5
						Cococoglucoside (and) Glycerol oleate	1	1	1	1	1
EDTA disodium salt	0.1	0.1	0.1	0.1	0.1
						Citric acid sodium salt	0.4	0.4	0.4	0.4	0.4
Citric acid	0.3	0.3	0.3	0.3	0.3
						PEG-150 pentaerythritol tetrastearate	0.3	0.3	0.3	0.3	0.3
Sodium benzoate	0.5	0.5	0.5	0.5	0.5
						Phenoxyethanol (and) ethylhexyl glycerol	0.5	0.5	0.5	0.5	0.5
Essence	0.5	0.5	0.5	0.5	0.5
						Water (W)	Balance of	Balance of	Balance of	Balance of	Balance of

The amino acid shampoos of comparative examples 1 to 5 were prepared according to the methods of examples 1 to 9.

Shampoo safety evaluation (Patch test)

Patch test (patch test) is a main method currently used in clinical tests for detecting type iv hypersensitivity by preparing a suitable concentration of an infusion, solution, ointment or original substance as a reagent according to the nature of a test substance, applying the reagent to the skin by a suitable method, and observing whether the organism generates hypersensitivity to the reagent after a certain time.

The test method comprises the following steps: 50 volunteers aged 20-40 years are randomly selected, and the selected volunteers have no history of skin allergy. The volunteers were randomly divided into 10 groups of 5 persons each, and the amino acid shampoos of examples 1-9 were used for patch tests, respectively.

A suitable amount of water was added to each of the amino acid shampoos of examples 1-9 to prepare test solutions having the same concentration, and 1cm was soaked in the test solutions²The gauze was applied to the flexor side of the forearm of the volunteer in a thickness of 4 layers, covered with a slightly larger transparent cellophane, fixed with plaster around, removed after 48 h (48 h induced local skin reaction), and the results were read according to the local skin performance. If the test result is negative, no allergy phenomenon exists; if the test result is positive, an irritant reaction (the erythema reaction disappears soon after the removal of the specimen) or an allergic reaction (the allergic reaction is manifested as invasive erythema, pimple, etc.) occurs.

According to observation, no irritation reaction or anaphylactic reaction appears on the tested parts of all the volunteers, and the test results are negative. The amino acid shampoo disclosed by the invention is safe and non-irritant to skin.

Second, testing the dandruff removing effect

Malassezia are one of the important factors for dandruff formation, and the growth of Malassezia is directly related to the amount of dandruff. Therefore, the most effective method for removing dandruff is to inhibit the growth of Ralstonia equina.

Preparation of sample plate: taking Xinhua I qualitative filter paper, beating the Xinhua I qualitative filter paper into a circular filter paper sheet with the diameter of 5 mm by using a puncher, sterilizing by using pressure steam, taking a plurality of sterilized and dried sample sheets, respectively dipping a small amount of the amino acid shampoo for implementing 1-9 and comparative examples 1-2 on the sample sheets by using sterile forceps, and smearing the sample sheets uniformly as much as possible.

Preparation of the plate: activated malassezia furfur (purchased from Wuhan university culture collection) is prepared into 10⁶cfu/mL~10⁷ cfu/mL bacterial suspension, 0.3 mL bacterial suspension is smeared on a Leeming with the length of 12 cm&Notman medium plate. After the plate containing the bacteria was left to stand for 10 min, the plate cover was opened in a sterile hood, and the plate was dried by blowing with sterile air (about 20 min).

Determination of the bacteriostatic effect: to each plate were attached 4 coupons, 1 negative control (no test shampoo sample) coupon, for a total of 5 coupons. After the sample is placed, the sample is lightly pressed by using sterile tweezers to make the sample tightly attached to the surface of the flat plate. The plate is covered, placed in a constant temperature incubator at 32 ℃ for inverted culture for 7 days, and the diameter of the bacteriostasis is measured and recorded by a vernier caliper. Evaluation criteria: when the diameter of the bacteriostatic ring is more than or equal to 20 mm, the dandruff removing effect is determined to be obvious; when the diameter of the bacteriostatic ring is more than 20 mm and more than or equal to 15 mm, the dandruff removing effect is judged to be general; when the diameter of the antibacterial ring is less than 15 mm, the effect of removing dandruff is judged to be not generated. The test results are shown in table 3.

TABLE 3

Sample (I)	Diameter of antibacterial ring (mm)	Anti-dandruff effect
			Example 1	34.79	Is obvious
Example 2	33.85	Is obvious
			Example 3	31.56	Is obvious
Example 4	22.79	Is obvious
			Example 5	29.65	Is obvious
Example 6	32.87	Is obvious
			Example 7	30.47	Is obvious
Example 8	29.89	Is obvious
			Example 9	31.02	Is obvious
Comparative example 1	13.04	Without dandruff-removing effect
			Comparative example 2	27.18	Is obvious

The results in Table 3 show that the amino acid shampoos of the examples all have significant anti-dandruff effects. At equal addition levels, piroctone olamine salt: the most effective anti-dandruff effect of the shampoo is achieved when myristamidopropyl PG-dimethyl ammonium chloride phosphate =1: 1. The anti-dandruff effect of the shampoo is improved along with the increase of the addition amount of the piroctone olamine salt, but when the addition amount of the piroctone olamine salt exceeds 0.3 percent, the anti-dandruff effect of the shampoo is gradually reduced, so that when the addition amount of the piroctone olamine salt is 0.3 percent, the anti-dandruff effect of the shampoo with the formula is the best.

Third, testing the use effect

130 female volunteers aged 20-40 years were randomly selected and divided into 13 groups, numbered 1-13. The volunteers in groups 1 to 13 respectively use the shampoos of examples 1 to 9 and comparative examples 3 to 5, after the shampoos are continuously used for 3 times, the using effect is fed back, the shampoos are evaluated according to evaluation items, and other hair care products are forbidden to be used in the test period. The number of persons who selected each item of the evaluation item in each group of volunteers was counted, and the results are shown in tables 4 and 5.

TABLE 4 shampoo usage statistics

TABLE 5 shampoo usage statistics

The results in tables 4 and 5 show that the volunteers who use the amino acid shampoo of examples 1-9 almost all obtain better use feeling, and also show that the amino acid shampoo of the invention has better cleaning power, good dandruff removing and itching relieving effects, rich and fine foam, is easy to rinse, can increase the softness of hair after washing, and is mild and non-irritant. In the shampoo of the comparative examples 3 to 5, the proportion of the foaming agent is changed, so that the cleanness, the washability, the foam richness, the mildness and the like of the shampoo are greatly influenced. The shampoo is characterized in that when the components of C14-16 olefin sodium sulfonate, decyl glucoside, cocamide MEA, methyl cocoyl taurate, sodium lauroyl sarcosinate solution and cocamidopropyl betaine are matched and used according to the proportion of the formula, the shampoo has good cleaning and decontaminating capacity, is mild, non-irritant, soft to hair, moderate in viscosity, rich, fine, stable and durable in foam and easy to wash clean.

Combining the above test results, the present invention uses the formulation of example 1 as the preferred formulation.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. The amino acid shampoo is characterized by comprising the following components in percentage by weight: 2-30% of C14-16 olefin sodium sulfonate, 1-10% of decyl glucoside, 0.1-5% of cocamide MEA, 1-20% of sodium methyl cocoyl taurate, 1-30% of sodium lauroyl sarcosinate solution, 1-30% of cocamidopropyl betaine, 0.01-1% of piroctone olamine, 0.05-2% of myristamidopropyl PG-dimethyl ammonium chloride phosphate, 0.01-2% of hydrolyzed corn starch solution, 0.01-2% of PEG-60 amygdalin and 0.01-3% of moisturizing and fatting agent; the moisturizing and fat-endowing agent is a mixture of coco glucoside and glycerol oleate.

2. The amino acid shampoo according to claim 1, wherein the amino acid shampoo comprises the following components in percentage by weight: 15% of C14-16 sodium olefin sulfonate, 8% of decyl glucoside, 1% of cocamide MEA, 10% of sodium methyl cocoyl taurate, 8% of sodium lauroyl sarcosinate solution and 20% of cocamidopropyl betaine.

3. The amino acid shampoo according to claim 1, wherein the mass ratio of the piroctone olamine salt to the myristamidopropyl PG-dimethyl ammonium chloride phosphate is: piroctone olamine salt: myristamidopropyl PG-dimethylammonium chloride phosphate =1: 1.

4. The amino acid shampoo according to claim 1, further comprising the following components in percentage by weight: 70.1-5% of polyquaternium and 100.01-1% of polyquaternium.

5. The amino acid shampoo according to claim 1, further comprising the following components: pH adjusters, thickeners, and preservatives;

the pH regulator comprises at least one of sodium citrate and citric acid;

the thickener comprises PEG-150 pentaerythritol tetrastearate;

the preservative comprises at least one of sodium benzoate, phenoxyethanol and ethylhexyl glycerin.

6. The amino acid shampoo of claim 5 wherein the preservative comprises sodium benzoate, and a mixture of phenoxyethanol and ethylhexylglycerin; the sodium benzoate comprises the following components in percentage by mass: the mixture of phenoxyethanol and ethylhexyl glycerol =1: 1.

7. The amino acid shampoo as claimed in any one of claims 1 to 6, wherein the amino acid shampoo is composed of the following components in parts by weight: 15% of C14-16 sodium olefin sulfonate, 8% of decyl glucoside, 1% of cocamide MEA, 10% of sodium methyl cocoyl taurate, 8% of sodium lauroyl sarcosinate solution, 20% of cocamidopropyl betaine, 0.3% of piroctone olamine, 0.3% of myristamidopropyl PG-dimethyl ammonium chloride phosphate, 0.3% of hydrolyzed corn starch solution, 72% of polyquaternium, 100.4% of polyquaternium, 0.5% of PEG-60 amygdalin, 1% of moisturizing and fat-liquoring agent, 0.1% of EDTA disodium, 0.4% of sodium citrate, 0.3% of citric acid, 0.3% of PEG-150 pentaerythritol tetrastearate, 0.5% of sodium benzoate, 0.5% of a mixture of phenoxyethanol and ethylhexyl glycerol, 0.5% of essence, and the balance of water.

8. The preparation method of the amino acid shampoo as claimed in claim 7, which comprises the following steps:

(1) adding EDTA disodium and part of water into an emulsifying pot, and heating to 85-90 ℃;

(2) dispersing polyquaternium-10 with the balance of water, then adding sodium citrate, stirring uniformly, and immediately adding into the emulsifying pot;

(3) adding C14-16 olefin sodium sulfonate, decyl glucoside, cocamide MEA, methyl cocoyl taurate, sodium lauroyl sarcosine solution, PEG-150 pentaerythritol tetrastearate, piroctone olamine, PEG-60 almond glyceride and a moisture-preserving fat-endowing agent into the emulsifying pot, stirring until the components are completely dissolved, preserving heat for 10-20 min, and then defoaming and cooling;

(4) cooling to 40-50 ℃, adding a hydrolyzed corn starch solution, cocamidopropyl betaine, myristamidopropyl PG-dimethyl ammonium chloride phosphate and polyquaternium-7, uniformly stirring, adding citric acid, and uniformly stirring;

(5) and finally, adding the mixture of sodium benzoate, phenoxyethanol and ethylhexyl glycerin and essence, and uniformly stirring to obtain the amino acid shampoo.