CN117017857A

CN117017857A - Moisturizing bath oil and preparation method thereof

Info

Publication number: CN117017857A
Application number: CN202311017539.3A
Authority: CN
Inventors: 向静静; 谭小军
Original assignee: Whealthfields Guangzhou Co ltd
Current assignee: Whealthfields Guangzhou Co ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2023-11-10

Abstract

The invention discloses moisturizing bath oil and a preparation method thereof, and relates to the technical field of daily chemicals. The moisturizing bath oil comprises the following components in percentage by weight: 32-45% of surfactant, 10-18% of synthetic grease, 25-30% of glycerol, 0.35-1.5% of natural vegetable grease, 0.5-4% of nonionic thickener, 0.1-3.5% of essence, 0.01-1% of rose water, 0.2-1% of preservative, 0.1-2% of citric acid and the balance of deionized water. The moisturizing bath oil provided by the invention is compounded by the amphoteric surfactant and the nonionic surfactant, so that the bath oil has proper mild cleaning force and foam effect; the synthetic grease, the glycerol and the natural vegetable grease are reasonably matched, so that the moist feel and the heating feel during bath oil washing are ensured.

Description

Moisturizing bath oil and preparation method thereof

Technical Field

The invention relates to the technical field of daily chemical products, in particular to moisturizing bath oil and a preparation method thereof.

Background

Along with the faster and faster pace of life, the diversified demands for bath products are gradually increased, the foam is moderate, the cleaning power is good, the skin is nourished after mild rubbing and washing, and the skin is not irritated. "skin care with oil" is one of the most attractive consumer trends in the recent Chinese cosmetic market, and consumers are beginning to prefer to try oil products such as cleansing oil, moisturizing oil, body oil, massage oil, etc., which exhibit greater growth potential, as well as bath oil. Traditional bath agents are mainly divided into two types, namely a soap base formed by high-temperature saponification of fatty acid and strong alkali (such as potassium hydroxide or sodium hydroxide) or a saponification type bath lotion formed by compounding other acceptable components, but the type of bath lotion has strong smell, strong alkalinity and super degreasing force, and is easy to cause dry, tight, itching and the like of skin after bathing; the other type is the surface active type bath cream which is formed by compounding other acceptable components with a surfactant, and the partial surfactant of the bath cream has the problems of strong degreasing force, insufficient refreshing and residual after washing, so that the skin is highly irritated, the sebum membrane on the skin can be damaged after long-term use, the natural barrier of the skin is damaged to a certain extent, and the skin is fragile and dry, so that various skin problems are caused. Therefore, it is often necessary to apply skin care products such as body lotions, skin oils, etc. after bathing to alleviate the above-mentioned skin problems. Bath oils containing oil components are becoming popular as daily-use washing and caring products, and they have been becoming popular in recent years.

With the continuous research and development of body care products, there have been a number of reports on bath oil compositions and methods of preparation: chinese patent No. 112494369A discloses a bath oil and a preparation method thereof, wherein the bath oil product is mainly prepared from vegetable oil, a cleaning agent, an emulsifying agent and an antioxidant, and the prepared bath oil is claimed to have excellent refreshing and washing effects and is mild and not irritated. However, the bath oil has reduced content of detergent and vegetable oil due to the addition of more emulsifier, and has both moisturizing and cleaning effects, but the effects of both are not outstanding, and the foam amount is less, so that the bath oil gives people an illusion of no washing. In addition, chinese patent No. 115381737A discloses a moisturizing type multi-foam bath oil and a preparation method thereof, wherein the bath oil comprises 30-50% of laureth type mixture, 25-30% of plant essential oil mixture, 1-2% of polyalcohol mixture, 2-4% of essence and the balance of oil ester mixture, and has good foam usage and moisturizing performance. The Chinese patent CN116421504A discloses a bath oil with high foam and high moisture for relieving dermatitis and a preparation method thereof, wherein the bath oil comprises sunflower seed oil, perilla seed oil and ginger root oil which are matched with a surfactant and an emollient for use so as to achieve moderate cleaning power and high foam, maintain the grease balance of skin, improve the water-deficient state of skin and increase the skin smoothness; meanwhile, the composition has the beneficial effects of improving skin inflammation and eczema, dispelling mites and resisting bacteria. Both bath oils achieve moderate cleaning power, foam texture and moisturizing after washing, but the grease components are more, the greasy feeling is strong during washing, the washing is slow, repeated rubbing is needed, and the requirements of young people on water-moist and fresh products cannot be met.

Therefore, there is a need to develop a moisturizing bath oil which has moderate cleaning power, good foam texture, is moist and not greasy during cleaning, and can keep moisture for a long time after cleaning, moisturize skin, and meet the use requirements of users while maintaining good cleaning feel.

Disclosure of Invention

In order to solve the problems, the invention provides moisturizing bath oil and a preparation method thereof, and the moisturizing bath oil specifically comprises the following technical scheme:

in a first aspect, a moisturizing bath oil is provided, which comprises the following components in percentage by weight:

32-45% of surfactant, 10-18% of synthetic grease, 25-30% of glycerol, 0.35-1.5% of natural vegetable grease, 0.5-4% of nonionic thickener, 0.1-3.5% of essence, 0.01-1% of rose water, 0.2-1% of preservative, 0.1-2% of citric acid and the balance of deionized water;

the surfactant is a mixture of nonionic surfactant and amphoteric surfactant; the weight ratio of the nonionic surfactant to the amphoteric surfactant is 1: (1-3);

the synthetic oil is one or more selected from PEG-7 glycerol cocoate, tocopheryl acetate and mixture of cocoyl glucoside and glycerol oleate;

The natural vegetable oil is selected from one or more of oleum Lavandula Angustifolia, rice bran oil, oleum Helianthi, soybean oil, and cedar wood oil.

Further, the amphoteric surfactant is sodium cocoyl amphoacetate; the nonionic surfactant is selected from one or more of cocoamidomethyl MEA, coco glucoside and polysorbate-20.

Further, the nonionic surfactant consists of cocamidomethyl MEA, coco glucoside and polysorbate-20; the weight ratio of the cocoamidomethyl MEA, coco glucoside and polysorbate-20 is 1: (3-6): (2-5).

Preferably, the weight ratio of the cocoamidomethyl MEA, coco glucoside and polysorbate-20 is 1:4:3.

further, the weight ratio of the nonionic surfactant to the amphoteric surfactant is 1:2.

further, the weight ratio of the natural vegetable oil to the synthetic oil to the glycerol is 1: (8-28): (18-54).

Preferably, the weight ratio of the natural vegetable oil to the synthetic oil to the glycerol is 1:14.2:27.5.

further, the synthetic oil consists of PEG-7 glycerol cocoate, tocopheryl acetate and a mixture of cocoyl glucoside and glycerol oleate, wherein the weight ratio of the mixture of the tocopheryl acetate, the PEG-7 glycerol cocoate and cocoyl glucoside to the glycerol oleate is 1: (45-70): (5-15).

Preferably, the weight ratio of the mixture of the tocopheryl acetate, the PEG-7 glycerol cocoate and the cocoyl glucoside and the glycerol oleate is 1:60:10.

further, the natural vegetable oil consists of hybrid lavender oil, rice bran oil, sunflower seed oil, soybean oil and cedar wood oil.

Further, the nonionic thickener is a mixture of PEG/PPG-120/10 trimethylolpropane trioleate and laureth-2.

Further, the preservative is selected from one or more of sodium benzoate and phenoxyethanol.

In a second aspect, there is provided the method for preparing moisturizing bath oil according to the first aspect, comprising the steps of:

s1, preparing materials according to weight percentage;

s2, adding a surfactant into deionized water, and uniformly mixing and stirring at 15-35 ℃ to prepare a phase A solution;

s3, sequentially adding synthetic grease, glycerol, natural vegetable grease, nonionic thickening agent, essence, rose water and preservative into the phase A solution, mixing and stirring the mixture at 15-35 ℃ until the solution is light yellow and transparent, and finally adding citric acid to adjust the pH value to 5.5-6.5, thus obtaining the moisturizing bath oil.

The cocoyl sodium amphoacetate is an amphoteric surfactant, has excellent stability, can be well compatible with anionic, cationic and nonionic surfactants, can reduce the irritation of the anionic surfactant, and has the advantages of thickening, stabilizing foam, hard water resistance and the like.

The coco glucoside belongs to a glucoside surfactant, is synthesized by glucose and natural fatty alcohol, has good foamability, is safe, has small stimulation and strong detergency, and is a novel nonionic surfactant with comprehensive performance. It can effectively clean the external pollutant of skin and restore the skin to clean state.

Polysorbate-20 belongs to fatty acid derivatives, can be used as an emulsifier in cosmetics, and can improve stability, compatibilize essence and improve product quality of cosmetics.

The cocoamidomethyl MEA is a natural novel nonionic surfactant, has excellent thickening and foaming and foam stabilizing performances, and does not contain diethanolamine and nitrosamine used in European Union.

PEG-7 glycerin cocoate is hydrophilic emollient oil ester, and HLB is between 10 and 11; the surfactant system is soluble in transparent, and is supplemented with grease, so that the surfactant system has excellent greasiness, can reduce the irritation of the surfactant, and improves the skin feel after use; can maintain the balance of skin and hair oil, reduce dry feel, and increase skin and hair smoothness.

The glycerol oleate can improve the mildness of the product to the skin, increase the moisturizing effect of the skin, improve the roughness of the skin and enable the skin to be smooth.

Tocopheryl acetate belongs to a vitamin E derivative, is often used as an antioxidant in cosmetics, has good antioxidant effect, is an oil-soluble natural substance, is a good nutrition moisturizing agent for skin, and can prevent rancidity and oxidation of grease and stabilize the grease when being added into a maintenance product. The composition has good performances of moisturizing and maintaining connective tissues and protecting skin from being damaged by ultraviolet rays, and can soften skin touch, keep skin moisture, promote wound healing, prevent inflammation, prevent rough skin and chap, and improve black spots.

Glycerin belongs to a chemical component which heats when meeting water. The glycerol contains three hydroxyl groups which can be effectively combined with water molecules, so that the moisture absorption and preservation are realized, and when the glycerol is in contact with the skin, the glycerol can absorb moisture aiming at the outside air and absorb moisture on the surface of the skin, so that air and water are caused to be fused into the glycerol dilution process, and heat is generated. The glycerol molecules can form hydrogen bonds with water molecules, can form a layer of film on the skin, has the functions of isolating air and preventing the skin from evaporating water, so that the skin is kept soft, and has good moisturizing effect.

The hybrid lavender oil is characterized by containing linalool which can reach about 50 percent and camphor which can reach about 10 percent, has stronger sterilization function and can effectively treat various skin and mucous membrane infections.

Rice bran oil is a nutritious vegetable oil rich in unsaturated fatty acid, octacosanol, gamma-oryzanol, phytosterol, tocotrienol, squalene and other functional substances, and has excellent antioxidant stability. Since its triglyceride is similar to sebum of human body, it is milder and more compatible with skin, and even after washing, the oil remains on the skin as a moisturizing ingredient.

Sunflower seed oil contains rich linoleic acid, linolenic acid, oleic acid and other fatty acids, and has the functions of softening skin, locking skin moisture and maintaining important barrier function of skin.

The soybean oil contains abundant unsaturated fatty acids such as linoleic acid and linolenic acid, and has high safety as edible oil, and can not generate allergy while moisturizing skin.

Cedar wood oil has excellent lipolytic effect, and can improve facial oil production and regulate scalp oil secretion.

The nonionic thickening agent comprises PEG/PPG-120/10 trimethylolpropane trioleate and laureth-2, and has good compatibility with various surface activities. The skin-care cream is easy to form a space network structure, is favorable for stabilizing grease, pearlescent chips and the like, so that the stability of a system is improved, is very suitable for sensitive skin isothermal and formula systems, has good compatibility with skin, is easy to separate out and deposit on the skin in the cleaning process, brings smooth and soft skin feel to the skin, and can enable the foam to be more moist and fine.

The rose water is also called as rose hydrosol, and is a saturated distilled stock solution separated when extracting rose essential oil, and has light rose fragrance. The rose hydrosol retains natural rose fragrance, can relax and relax, has pleasant mood, and has effects of moisturizing, whitening and removing speckle.

Sodium benzoate is an acidic preservative, the preservation principle of which is as follows: the cell membrane has high lipophilicity, is easy to penetrate into a cell body, interferes with the permeability of the cell membrane, inhibits the absorption of amino acid by the cell membrane, inhibits the activity of a cell respiratory enzyme system, prevents the condensation reaction of acetyl coenzyme and inhibits the activity of microorganisms, thereby achieving the aim of product preservation.

The phenoxyethanol has a slightly aromatic smell, is stable below 80 ℃, mainly inhibits bacteria, is weak in inhibition on fungi, has stable and effective pH value of 3-10, can be compatible with anionic and cationic surfactants, and has the corrosion prevention mechanism that the permeability of microbial membranes is lost, so that cell contents are exuded, and energy generated by electronic power is lost.

The citric acid is extracted from lemon, and belongs to one of fruit acids. The cosmetics are mainly used as chelating agent, buffering agent and acid-base regulator, and are important matters essential for circulation in human body. It can accelerate cutin regeneration, and is helpful for skin melanin exfoliation, pore contraction, and blackhead dissolution. And has effects of moistening skin and whitening skin, and can be used for improving skin black spot and roughness.

Compared with the prior art, the invention has the beneficial effects that:

the moisturizing bath oil provided by the invention is compounded by the amphoteric surfactant and the nonionic surfactant, so that the bath oil has proper mild cleaning force and foam effect; the synthetic grease, the glycerol and the natural vegetable grease are reasonably matched, so that the moist feel and the heating feel during bath oil washing are ensured; the non-ionic thickener is also added to ensure that the bath oil has a certain viscosity and accords with the texture of the oil; therefore, the bath oil can realize the technical effects of moisturizing and nourishing through the collocation of the surfactant, the synthetic grease, the glycerol, the natural vegetable grease and the nonionic thickener. Furthermore, the essence and the rose water are matched to generate a synergistic effect, so that a user can relax during washing, and the skin is subjected to lasting moisturizing after washing, so that the skin is moistened; finally, the weak acid system of the bath oil is stable and safe for a long time by adding the preservative and the citric acid.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In order to more fully understand the technical content of the present invention, the following description and description of the technical solution of the present invention will be further presented with reference to specific embodiments.

The nonionic thickener in the invention can be selected from TT，/>TT is derived from coconut oil and palm kernel oil.

The mixture of cocoyl glucoside and glycerol oleate in the invention can be selected fromPO65，PO65 was derived from coconut and sunflower oils, natural index 100%.

Preparation method of moisturizing bath oil

S1, preparing materials according to weight percentage;

Effect test of bath oil-foam Performance test

S1, selecting a screened test subject, marking a fixed position on the inner side of the left forearm by using a marker pen, lightly wiping the forearm by using clear water, and standing for 15min in a standard environment (the temperature is 20-22 ℃ and the humidity is 40-60%).

S2, cleaning the marked position of the left forearm of the subject by using bath oil with the mass of 1g, controlling the same operation and cleaning time, observing the foaming speed and foam texture of the bath oil and feeling the heating effect of the arm during cleaning, and recording.

Effect test of bath oil-mildness test

The test utilizes the characteristics of complete, clear and transparent chorioallantoic membrane vascular system in the middle period of the hatched chick embryo, a certain amount of the test object is directly contacted with the chick embryo allantoic membrane, and changes of chorioallantoic membrane toxicity effect indexes (such as bleeding, coagulation and vascular thawing) are observed after a period of action, the indexes reflect changes of morphological structures, colors and permeability of blood vessels and vascular networks, and reflect phenomena such as chorioallantoic membrane protein denaturation and the like and damage degree thereof, and finally a score is obtained by combination, so that the eye irritation of the test object is evaluated. The experimental steps are as follows:

s1, preparation of a test object

S1.1. liquid test article

The liquid test object of the present invention is bath oil. The test should be carried out in undiluted form of stock solution by the reaction time method; opaque liquid test substances (turbid and colored suspensions) should be tested using an endpoint evaluation method; the opaque turbid liquid test object can be dissolved/diluted by a proper solvent to be the transparent solution with the highest concentration, and the test is carried out by adopting a reaction time method. The experiment is carried out by adopting an end point evaluation method;

s1.2. control and preparation

Negative control: a 0.9% sodium chloride solution is typically selected for rinsing and negative control during the experiment.

Positive control: each test should be provided with a known eye irritant, and if the test is intended to identify corrosive or severely irritating substances, the positive control should be one that is capable of producing a severe response, such as 1% SDS, 0.1 mol/L sodium hydroxide. If the severity of eye irritation is to be assessed, positive substances that do not change too strongly in response, such as acetic acid at various concentrations, are selected.

Solvent control: if the test object is diluted with a solvent, the test should be provided with a solvent control.

Reference control: the method is mainly used for proving the effectiveness of a test method, particularly checking the reactivity of each batch of chick embryos, detecting turbidity/classifying test objects with special eye irritation reaction or evaluating the relative irritation capability of an eye irritation object, and the like. The reference control substance should have the following properties: the stable and reliable sources, structures and functions are similar to the chemical classification of the test substance, the physical/chemical characteristics are known, the in vivo rabbit eye test effect is known, and the degree of the expected reaction is known.

S2.CAM preparation

The 9-day-old chick embryos are checked for candling and the unfertilized, inactive, defective, shell-broken chick embryos are discarded. The position of the air chamber is marked by a pen, the shell is opened by a mini cutter, and the remaining shell in the air chamber is peeled off along the shell opening position, so that the integrity of the egg membrane is not damaged by careful operation. The wet egg membrane is dripped by a suction tube, and the inner membrane is carefully removed by forceps, so that the vascular membrane is not damaged. At this point the structure of the vascular system should be observed again, and if intact, the next test can be performed.

S3, detecting

0.3mL of the extruded test object was directly applied to the CAM, ensuring that at least 50% of the CAM surface was covered by the test object. After 3min of action, the test substance on the CAM membrane was gently rinsed with physiological saline, and the results were observed within 30 seconds after the rinsing was completed, and the extent of each toxic effect change was observed. If observations indicate that at least 1 response of all 6 chick embryos is scored above moderate, the test should be repeated once.

S4, observation of results

S4.1. bleeding

Referring to the outflow of blood from the blood vessels and/or capillaries of a CAM, the outflow may take a variety of forms, such as a cauliflower, smooth, diffuse gauze or punctate hemorrhage (due to selective outflow of blood from different areas of the vascular membrane); bleeding was graded and scored according to severity.

a) No bleeding (0 score);

b) Mild bleeding (1 min): bleeding from small blood vessels and small amount of bleeding (such as 0.5% Texapon ASV, 5 min);

c) Moderate bleeding (2 min): bleeding from small and large vessels, and significant blood flow (e.g., 1.0% Texapon ASV, 5 min);

d) Severe bleeding (3 points): almost all blood vessels bleed and a large amount of blood flows out (e.g., 5% Texapon ASV, 5 min). It should be noted that bleeding may be transient, and that the massive bleeding observed for the first 30 seconds may cover the bleeding response that occurs later.

S4.2. coagulation

Refers to the denaturation of intravascular and extravascular proteins, usually found only in large and moderately large blood vessels, excluding changes in capillary angiogenesis. Thrombus: i.e., intravascular coagulation, interruption of intravascular blood flow due to various causes, such as changes in vessel pressure, swelling of the vessel wall, etc., appears as a dark intravascular coagulation spot. Extravascular clotting: clotting points that can appear as dark extravascular colors; it may also appear cloudy (opaque), appear on all or a portion of the film, may be approximately opalescent tissue-like, or be opaque. Careful examination is required not to confuse coagulation with changes in physicochemical properties of the test substance in aqueous solution (e.g. colloid formation, precipitation, etc.). Coagulation was graded and scored by severity.

a) No clotting (0 min);

b) Mild coagulation (1 min): intravascular and/or extravascular light coagulation, and/or light turbidity of the CAM membrane (light coagulation such as 0.2% sodium hydroxide for 5min, light turbidity such as 0.3% acetic acid for 5 min);

c) Moderate coagulation (2 min): intravascular and/or extravascular moderate coagulation, and/or moderate turbidity of the CAM membrane (moderate coagulation such as 0.3% sodium hydroxide for 5min, moderate turbidity such as 3% acetic acid for 5 min);

d) Severe coagulation (3 points): intravascular and/or extravascular severe coagulation, and/or severe turbidity of the CAM membrane (severe coagulation such as 0.5% sodium hydroxide for 5min, severe turbidity such as 30% acetic acid for 5 min).

S4.3. vascular thawing

Meaning that the blood vessels on the CAM membrane disappear, possibly due to multiple factors such as bleeding, changes in wall tension of the blood vessels, etc. Blood melting was graded and scored by severity.

a) Avascular thawing (0 minutes);

b) Mild vascular thawing (1 min): only small vessel thawing (e.g. 0.5% texapon ASV, 5 min);

c) Moderate vascular thawing (2 min): small and large vessels were thawed (e.g., 1% texapon ASV, 5 min);

d) Severe vascular thawing (3 minutes): large vessels and all vessel trees are thawed (e.g., 5% texapon ASV, 5 min).

S5, end point scoring (ES)

The end point score (ES) should be calculated for the test performed using the end point evaluation method, with the result remaining two bits after the decimal point: the total of the extent to which bleeding, clotting, and vascularization were observed in es=6 chick embryos was classified according to ES value. Endpoint scoring stimulus classification:

a) ES is less than or equal to 12, no/light irritation;

b) Moderate irritation with ES less than 12 and ES less than 16;

c) ES is more than or equal to 16 and has strong irritation/corrosiveness.

Effect test of bath oil-moisture retention test

The method for testing the moisturizing performance comprises the following steps:

s1, selecting a screened test subject, marking a fixed position on the inner side of the left forearm by using a marker pen, lightly wiping the forearm by using clear water, standing for 15min in a standard environment (the temperature is 20-22 ℃ and the humidity is 40-60%), and then testing the moisture value L1 of the marked position by using a skin detector and recording.

S2, cleaning the marked position of the left forearm of the subject by using 300 mu L of bath oil, controlling the same operation and cleaning time, naturally airing after cleaning, standing for 30min, and then testing the moisture value L2 of the marked position again by using a skin detector to reach a specified node, and recording.

S3, comparing the moisture content of the S1 and the moisture content of the S2 to obtain a moisture content increase rate; moisture content increase rate= (L2-L1)/L1.

Effect test of bath oil-moisture loss test

Skin moisture loss (TEWL) is an important parameter for evaluating the function of the skin moisture protective layer, and can be used to evaluate the strength of the skin barrier function. If the skin barrier function is impaired, TEWL will increase and the skin will develop symptoms such as dryness, desquamation, sensitivity, etc. If the skin protection layer is better, the higher the moisture content, the lower the value of the skin moisture loss TEWL, the unit of TEWL is: g/hm ² . The water loss test method comprises the following steps:

s1, selecting a screened subject, marking a fixed position on the inner side of the left forearm by using a marker pen, lightly wiping the forearm by using clear water, standing for 15min in a standard environment (the temperature is 20-22 ℃ and the humidity is 40-60%), and then testing the skin moisture loss W1 by using a skin moisture loss test probe and recording;

s2, cleaning the marked position of the left forearm of the subject by 300 mu L of bath oil every day, controlling the same operation and cleaning time, continuously using for seven days, naturally airing and sitting for 30min after cleaning on the seventh day, and testing and recording the skin moisture loss W2 by adopting a skin moisture loss test probe.

During the test, the subject was unable to apply any additional cosmetics at the test site.

Example 1

A moisturizing bath oil comprises the following components in percentage by weight:

surfactant 36% (24% sodium cocoyl amphoacetate, 1.5% cocoamide methyl MEA, 6% cocoyl glucoside and 4.5% polysorbate-20),

synthetic oil 14.2% (12% PEG-7 glycerol cocoate, 0.2% tocopheryl acetate, 2% cocoyl glucoside and glycerol oleate mixture),

27.5 percent of glycerin,

1% of natural vegetable oil (0.1% of hybrid lavender oil, 0.25% of rice bran oil, 0.25% of sunflower seed oil, 0.25% of soybean oil and 0.15% of cedar wood oil),

Nonionic thickener 1.5% (mixture of PEG/PPG-120/10 trimethylolpropane trioleate and laureth-2),

3% of essence,

1 percent of rose water,

preservative 0.8% (0.3% sodium benzoate and 0.5% phenoxyethanol),

citric acid 0.85 percent,

the balance of deionized water;

the moisturizing bath oil of example 1 is prepared by the following components in percentage by weight:

s1, preparing materials according to weight percentage;

s2, adding a surfactant into deionized water, and uniformly mixing and stirring at 25 ℃ to prepare a phase A solution;

s3, sequentially adding synthetic grease, glycerol, natural vegetable grease, nonionic thickening agent, essence, rose water and preservative into the phase A solution, mixing and stirring the mixture at 25 ℃ until the solution is light yellow and transparent, and finally adding citric acid to adjust the pH value to 6, thus obtaining the moisturizing bath oil.

1. Effect of different weights of surfactant on bath oil Effect

Example 2: example 2 differs from example 1 in that the weight percent of surfactant in the bath oil was 43.5% (27% sodium cocoyl amphoacetate, 2% cocamidomethyl MEA, 9.5% cocoyl glucoside and 5% polysorbate-20), all the other conditions being the same.

Comparative example 1: comparative example 1 is different from example 1 in that the bath oil does not contain a surfactant, and the other conditions are the same.

Comparative example 2: comparative example 2 was compared to example 1, except that the weight percentage of surfactant in the bath oil was 8% (1% sodium cocoyl amphoacetate, 1% cocamidomethyl MEA, 1% cocoyl glucoside, and 5% polysorbate-20), all the other conditions being the same.

Comparative example 3: comparative example 3 was compared to example 1, except that the weight percentage of surfactant in the bath oil was 50% (30% sodium cocoyl amphoacetate, 2% cocamidomethyl MEA, 10% cocoyl glucoside, and 8% polysorbate-20), all the other conditions being the same.

Comparative example 4: comparative example 4 was compared to example 1, except that the weight percent of surfactant in the bath oil was 25% surfactant (15% sodium cocoyl amphoacetate, 1% cocoamidomethyl MEA, 4% cocoyl glucoside, and 5% polysorbate-20), all the other conditions being the same.

Mildness tests were performed on examples 1-2 and comparative examples 1-4, respectively, and the foaming properties of the bath oil during use were observed, and the test results are shown in tables 1 and 2 below:

TABLE 1 results of examples 1-2, comparative examples 1-4, moisturizing bath oil mildness test

As is clear from the test results in table 1, the moisturizing and moisturizing bath oil is free from the addition of the surfactant (comparative example 1), has a small addition amount of the surfactant (comparative examples 2 and 4) or has a large influence on the mild performance of the bath oil due to a large addition amount of the surfactant (comparative example 3), and has a moderate irritation, so that the weight percentage of the surfactant in the moisturizing and moisturizing bath oil is preferably 32 to 45%.

TABLE 2 results of test of moisturizing bath oil foam Performance for examples 1-2, comparative examples 1-4

As is clear from the test results in Table 2, the moisturizing bath oil is free from the addition of the surfactant (comparative example 1), has a small addition amount of the surfactant (comparative examples 2 and 4) or has a large influence on the foam performance of the bath oil due to a large addition amount of the surfactant (comparative example 3), and therefore the weight percentage of the surfactant in the moisturizing bath oil is preferably 32 to 45%.

2. Influence of different weight ratios of amphoteric surfactant to nonionic surfactant in surfactant on bath oil effect

Example 3: example 3 differs from example 1 in that the weight percentage of nonionic surfactant in the bath oil is 18% and the weight percentage of amphoteric surfactant is 18%, i.e. the weight ratio of nonionic surfactant to amphoteric surfactant is 1:1, and the rest conditions are the same.

Example 4: example 4 differs from example 1 in that the weight percentage of nonionic surfactant in the bath oil is 9% and the weight percentage of amphoteric surfactant is 27%, i.e. the weight ratio of nonionic surfactant to amphoteric surfactant is 1:3, and the rest conditions are the same.

Comparative example 5: comparative example 5 is different from example 1 in that the bath oil does not contain an amphoteric surfactant, and the remaining conditions are the same.

Comparative example 6: comparative example 6 is different from example 1 in that the bath oil does not contain a nonionic surfactant, and the other conditions are the same.

Comparative example 7: comparative example 7 is different from example 1 in that the weight percentage of nonionic surfactant in the bath oil is 24% and the weight percentage of amphoteric surfactant is 12%, i.e., the weight ratio of nonionic surfactant to amphoteric surfactant is 1:0.5, and the rest conditions are the same.

Comparative example 8: comparative example 8 differs from example 1 in that the weight percent of nonionic surfactant in the bath oil is 7.2% and the weight percent of amphoteric surfactant is 28.8%, i.e., the weight ratio of nonionic surfactant to amphoteric surfactant is 1:4, and the rest conditions are the same.

Mildness tests were performed on example 1, examples 3-4 and comparative examples 5-8, respectively, and the foaming properties of the bath oil during use were observed, and the test results are shown in tables 3 and 4 below:

TABLE 3 results of the moisturizing bath oil mildness test for example 1, examples 3-4 and comparative examples 5-8

As can be seen from the test results in table 3, the moisturizing bath oil is free of amphoteric surfactant (comparative example 5), free of nonionic surfactant (comparative example 6), low in addition amount of amphoteric surfactant (comparative example 7), high in addition amount of amphoteric surfactant or insufficient in addition amount of nonionic surfactant Rong Xiangjing (comparative example 8), has a large influence on the mildness of the bath oil and has moderate irritation, so that the weight ratio of nonionic surfactant to amphoteric surfactant in the moisturizing bath oil is preferably 1: (1-3).

Table 4 results of the moisturizing bath oil foam Performance test of example 1, examples 3-4, and comparative examples 5-8

As can be seen from the test results in table 4, the moisturizing and moisturizing bath oil is free of amphoteric surfactant (comparative example 5), free of nonionic surfactant (comparative example 6), less in the addition amount of amphoteric surfactant (comparative example 7), more in the addition amount of amphoteric surfactant or insufficient in the addition amount of nonionic surfactant Rong Xiangjing (comparative example 8), and has a great influence on the foaming property of the bath oil, so that the weight ratio of nonionic surfactant to amphoteric surfactant in the moisturizing and moisturizing bath oil is preferably 1: (1-3).

3. Effect of different weight ratios based on nonionic surfactant Components on bath oil Effect

Example 5: example 5 differs from example 1 in that the weight percent of nonionic surfactant in the bath oil is 12% (2% cocoamidomethyl MEA, 6% cocoglucoside, and 4% polysorbate-20), wherein the weight ratio of cocoamidomethyl MEA, cocoglucoside, and polysorbate-20 is 1:3:2, with the remaining conditions being the same.

Example 6: example 6 differs from example 1 in that the weight percent of nonionic surfactant in the bath oil is 12% (1% cocoamidomethyl MEA, 6% cocoglucoside, and 5% polysorbate-20), wherein the weight ratio of cocoamidomethyl MEA, cocoglucoside, and polysorbate-20 is 1:6:5, the rest conditions are the same.

Comparative example 9: comparative example 9 differs from example 1 in that the weight percentage of nonionic surfactant in the bath oil was 12% (6% coco glucoside and 6% polysorbate-20), wherein cocoamidomethyl MEA was absent, and the remaining conditions were the same.

Comparative example 10: comparative example 10 differs from example 1 in that the weight percentage of nonionic surfactant in the bath oil was 12% (2% cocoamidomethyl MEA and 10% cocoglucoside), wherein polysorbate-20 was absent, and the remaining conditions were the same.

Comparative example 11: comparative example 11 differs from example 1 in that the weight percentage of nonionic surfactant in the bath oil is 12% (2% cocoamidomethyl MEA, 8% cocoglucoside, and 2% polysorbate-20), wherein the weight ratio of cocoamidomethyl MEA, cocoglucoside, and polysorbate-20 is 1:4:1, and the rest conditions are the same.

Comparative example 12: comparative example 12 differs from example 1 in that the weight percentage of nonionic surfactant in the bath oil was 12% (2% cocoamidomethyl MEA and 10% polysorbate-20), wherein cocoglucoside was absent, with the remaining conditions being the same.

Mildness tests were performed on example 1, examples 5-6 and comparative examples 9-12, respectively, and the foaming properties of the bath oil during use were observed, and the test results are shown in tables 5 and 6 below:

table 5 results of the moisturizing bath oil mildness test of example 1, examples 5-6 and comparative examples 9-12

As can be seen from the test results in Table 5, the addition of no coco glucoside (comparative example 12), no polysorbate-20 (comparative example 10) and insufficient amount of polysorbate-20 Rong Xiangjing (comparative example 11) to the moisturizing and nourishing bath oil has a large effect on the mild performance of the bath oil and has a moderate irritation, so that the weight ratio of coco amidomethyl MEA, coco glucoside and polysorbate-20 in the nonionic surfactant in the bath oil is preferably 1: (3-6): (2-5).

Table 6 results of the moisturizing bath oil foam Performance test of example 1, examples 5-6 and comparative examples 9-12

As can be seen from the test results in Table 6, the addition of no coco glucoside (comparative example 12), no polysorbate-20 (comparative example 10), no coco amide methyl MEA (comparative example 9), and insufficient amount of polysorbate-20 Rong Xiangjing (comparative example 11) to the bath oil has a large effect on the foaming properties of the bath oil, and therefore the weight ratio of coco amide methyl MEA, coco glucoside, and polysorbate-20 in the nonionic surfactant in the bath oil is preferably 1: (3-6): (2-5).

4. Based on the influence of different weight ratios of natural vegetable oil, synthetic oil and glycerin on the effect of bath oil

Example 7: example 7 is different from example 1 in that the bath oil comprises 1.525% by weight of natural vegetable oil and fat, 12.2% by weight of synthetic oil and fat, and 28.975% by weight of glycerin, namely, the weight ratio of natural vegetable oil and fat, synthetic oil and glycerin is 1:8:19, the remaining conditions were the same.

Example 8: example 8 is different from example 1 in that the bath oil comprises 1.22% by weight of natural vegetable oil and fat, 19.52% by weight of synthetic oil and fat, and 21.96% by weight of glycerin, namely, the weight ratio of natural vegetable oil and fat to synthetic oil and glycerin is 1:16:18, and the rest conditions are the same.

Comparative example 13: comparative example 13 was different from example 1 in that no natural vegetable oil was contained and the other conditions were the same.

Comparative example 14: comparative example 14 was different from example 1 in that the bath oil had a weight percentage of natural vegetable oil and fat of 0.2%, a weight percentage of synthetic oil and fat of 10%, and a weight percentage of glycerin of 25%, that is, the weight ratio of natural vegetable oil and fat, synthetic oil and glycerin was 1:50:125, and the other conditions were the same.

Comparative example 15: comparative example 15 is different from example 1 in that the bath oil comprises 2% by weight of natural vegetable oil, 10% by weight of synthetic oil, and 25% by weight of glycerin, i.e., the weight ratio of natural vegetable oil, synthetic oil and glycerin is 1:5:12.5, and the other conditions are the same.

Comparative example 16: comparative example 16 was compared with example 1, except that no glycerin was contained, and the other conditions were the same.

Comparative example 17: comparative example 17 is different from example 1 in that the bath oil comprises 1.5% by weight of natural vegetable oil and fat, 12% by weight of synthetic oil and 22.5% by weight of glycerin, i.e., the weight ratio of natural vegetable oil and fat to glycerin is 1:8:15, and the other conditions are the same.

Comparative example 18: comparative example 18 was different from example 1 in that the bath oil had a weight percentage of natural vegetable oil and fat of 0.4%, a weight percentage of synthetic oil and fat of 10%, and a weight percentage of glycerin of 32%, that is, the weight ratio of natural vegetable oil and fat, synthetic oil and glycerin was 1:25:80, and the other conditions were the same.

Comparative example 19: comparative example 19 was different from example 1 in that no synthetic oil was contained and the other conditions were the same.

Comparative example 20: comparative example 20 is different from example 1 in that the bath oil comprises 1% by weight of natural vegetable oil and fat, 5% by weight of synthetic oil and 25% by weight of glycerin, that is, the weight ratio of natural vegetable oil and fat to glycerin is 1:5:25, and the other conditions are the same.

Comparative example 21: comparative example 21 is different from example 1 in that the bath oil comprises 0.8% by weight of natural vegetable oil and fat, 24% by weight of synthetic oil and 28% by weight of glycerin, namely, the weight ratio of natural vegetable oil and fat to glycerin is 1:30:35, and the other conditions are the same.

Comparative example 22: comparative example 22 was different from example 1 in that no natural vegetable oil or fat was contained as compared with synthetic oil or fat, and the other conditions were the same.

Comparative example 23: comparative example 23 was different from example 1 in that no natural vegetable oil or fat and no glycerin were contained, and the other conditions were the same.

Moisture retention property test, moisture loss test, and observation of foaming property of bath oil and heat feeling at washing during use were performed for example 1, examples 7 to 8, and comparative examples 13 to 23, respectively, and the test results are shown in tables 7 and 8 below:

table 7 results of moisturizing Performance test of moisturizing bath oil, moisture loss test of example 1, examples 7 to 8 and comparative examples 13 to 23

As is clear from the test results shown in Table 7, the moisturizing bath oil was free of synthetic fat (comparative example 19), free of glycerin (comparative example 16), free of natural vegetable fat (comparative example 13), free of natural vegetable fat and synthetic fat (comparative example 22), free of natural vegetable fat and glycerin (comparative example 23), low in the amount of natural vegetable fat added (comparative example 14), high in the amount of synthetic fat (comparative example 21), low in the amount of synthetic fat (comparative example 20), high in the amount of glycerin (comparative example 18), low in the rate of increase in the moisture content, and large in the loss of skin moisture. Wherein, the influence of the lack of two components of synthetic grease and natural vegetable grease or glycerin and natural vegetable grease on the moisturizing performance and the water loss of the bath oil is larger than that of the lack of a single component. The amount of the natural vegetable oil and fat (comparative example 15) was further increased, and the increase in the moisture content and the loss of skin moisture were not significantly affected. Therefore, the weight ratio of the natural vegetable oil synthetic oil to the glycerol in the moisturizing bath oil is 1: (8-28): (18-54).

TABLE 8 results of moisturizing bath oil foam Performance test, heat sensation test at washing for example 1, examples 7-8, and comparative examples 13-23

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As can be seen from the test results in Table 8, the moisturizing bath oil has a high natural vegetable oil content (comparative example 15), no synthetic oil content (comparative example 19) or a high synthetic oil content (comparative example 21) or a low synthetic oil content (comparative example 20), and a high glycerin content (comparative example 18) and has a large influence on the foaming properties of the bath oil. Since glycerin (comparative example 16 and comparative example 23) was not contained, the influence of heat generated during bath oil washing was large, and therefore, the weight ratio of the natural vegetable oil synthetic oil to glycerin in the moisturizing bath oil was 1: (8-28): (18-54).

5. Influence of weight ratio of synthetic oil components on bath oil effect

Example 9: example 9 differs from example 1 in that the synthetic fat content in the bath oil was 14.2% by weight (12.5% PEG-7 glycerol cocoate, 0.2% tocopheryl acetate, 1.5% cocoyl glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and cocoyl glucoside to glycerol oleate mixture was 1:62.5:7.5, the rest conditions are the same.

Example 10: example 10 differs from example 1 in that the synthetic fat content in the bath oil was 14.2% by weight (11.1% PEG-7 glycerol cocoate, 0.2% tocopheryl acetate, 2.9% cocoyl glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and cocoyl glucoside to glycerol oleate mixture was 1:55.5:14.5, the other conditions being identical.

Comparative example 24: comparative example 24 was compared with example 1, except that PEG-7 glycerol cocoate was absent from the synthetic oil and fat, and the other conditions were the same.

Comparative example 25: comparative example 25 was compared with example 1, except that the mixture of coco glucoside and glycerol oleate was absent from the synthetic oil and fat, and the other conditions were the same.

Comparative example 26: comparative example 26 was compared with example 1, except that the synthetic oil and fat lacked tocopheryl acetate, and the remaining conditions were the same.

Comparative example 27: comparative example 27 differs from example 1 in that the weight percentage of synthetic oil and fat is 14.2% (12% PEG-7 glycerol cocoate, 0.1% tocopheryl acetate, 2.1% coco glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and coco glucoside to glycerol oleate mixture is 1:120:21, the rest of the conditions are the same.

Comparative example 28: comparative example 28 compared to example 1, the difference was that the weight percentage of synthetic oil was 14.2% (12% PEG-7 glycerol cocoate, 1% tocopheryl acetate, 1.2% coco glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate, and coco glucoside and glycerol oleate mixture was 1:12:1.2, the rest of the conditions are the same.

Comparative example 29: comparative example 29 differs from example 1 in that the weight percentage of synthetic oil and fat is 14.2% (7% PEG-7 glycerol cocoate, 0.5% tocopheryl acetate, 6.7% coco glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and coco glucoside to glycerol oleate mixture is 1:14:13.4, the remaining conditions are the same.

Comparative example 30: comparative example 30 is different from example 1 in that the weight percentage of synthetic oil is 14.2% (13.6% PEG-7 glycerol cocoate, 0.1% tocopheryl acetate, 0.5% coco glucoside and glycerol oleate) i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and coco glucoside to glycerol oleate is 1:136:5, and the rest conditions are the same.

Comparative example 31: comparative example 31 is different from example 1 in that the weight percentage of synthetic oil is 14.2% (13.1% PEG-7 glycerol cocoate, 0.2% tocopheryl acetate, 0.9% coco glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and coco glucoside to glycerol oleate mixture is 1:65.5:4.5, the rest conditions are the same.

Comparative example 32: comparative example 32 differs from example 1 in that the weight percentage of synthetic oil and fat is 14.2% (10% PEG-7 glycerol cocoate, 0.2% tocopheryl acetate, 4% cocoyl glucoside and glycerol oleate mixture), i.e. the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate and cocoyl glucoside to glycerol oleate mixture is 1:50:20, and the rest conditions are the same.

Moisturizing bath oils of example 1, examples 9 to 10 and comparative examples 24 to 32 were subjected to a moisturizing property test, a moisture loss test, and the foaming properties of the bath oils during use were observed, and the test results are shown in tables 9 and 10 below:

table 9 results of moisturizing performance test, moisture loss test of example 1, examples 9 to 10 and comparative examples 24 to 32 moisturizing bath oils

As can be seen from the test results in Table 9, the moisturizing bath oils of examples 1, 9 and 10 of the present invention have high moisture content increase rate and less skin moisture loss. The synthetic oil of the moisturizing bath oil is free of PEG-7 glycerol cocoate (comparative example 24) or PEG-7 glycerol cocoate (comparative example 29), the PEG-7 glycerol cocoate is high (comparative example 30), the mixture of cocoyl glucoside and glycerol cocoate (comparative example 25) is not added, and the addition of tocopheryl acetate (comparative example 26) has a great influence on the increase rate of the moisture content of the moisturizing bath oil. The increase in the amounts of coco glucoside and glycerol oleate (comparative example 32) and tocopheryl acetate (comparative example 28) had little effect on the rate of increase in moisture content and the amount of skin moisture loss. Thus, the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate to cocoyl glucoside to glycerol oleate mixture in the synthetic oil of bath oil was 1: (45-70): (5-15).

Table 10 results of the moisturizing bath oil foam performance test of example 1, examples 9-10 and comparative examples 24-32

As can be seen from the test results in Table 10, the moisturizing bath oils of examples 1, 9 and 10 of the present invention have fast foaming, a large amount of foam, and fine and smooth foam. The synthetic oils and fats of the moisturizing bath oil were free of PEG-7 glycerol cocoate (comparative example 24) or low in PEG-7 glycerol cocoate (comparative example 29), free of a mixture of cocoyl glucoside and glycerol oleate (comparative example 25) or low in cocoyl glucoside and glycerol oleate (comparative example 31) or high in cocoyl glucoside and glycerol oleate (comparative example 32), high in tocopheryl acetate (comparative example 28), and have a large influence on the foam properties of the bath oil. Thus, the weight ratio of tocopheryl acetate, PEG-7 glycerol cocoate to cocoyl glucoside to glycerol oleate mixture in the synthetic oil of bath oil was 1: (45-70): (5-15).

6. Based on the influence of natural vegetable oil components on the effect of bath oil

Example 11: example 11 is different from example 1 in that the bath oil contains 1% by weight of natural vegetable oil (0.1% by weight of lavender oil, 0.3% by weight of rice bran oil, 0.2% by weight of sunflower seed oil, 0.3% by weight of soybean oil, and 0.1% by weight of cedar wood oil) and the other conditions are the same.

Example 12: example 12 is different from example 1 in that the bath oil contains 1% by weight of natural vegetable oil (0.1% by weight of lavender oil, 0.2% by weight of rice bran oil, 0.3% by weight of sunflower seed oil, 0.3% by weight of soybean oil, and 0.1% by weight of cedar wood oil) and the other conditions are the same.

Comparative example 33: comparative example 33 was different from example 1 in that the natural vegetable oil and fat contained no miscellaneous lavender oil and cedar oil, and the other conditions were the same.

Comparative example 34: comparative example 34 was compared with example 1, except that the natural vegetable oil and fat contained no cedar oil, and the other conditions were the same

Comparative example 35: comparative example 35 is different from example 1 in that the natural vegetable oil and fat does not contain rice bran oil, and the other conditions are the same

Comparative example 36: comparative example 36 was different from example 1 in that the natural vegetable oil and fat did not contain sunflower seed oil, and the other conditions were the same.

Comparative example 37: comparative example 37 was different from example 1 in that the natural vegetable oil and fat contained no soybean oil, and the other conditions were the same.

Comparative example 38: comparative example 38 was compared with example 1, except that the natural vegetable oil and fat contained no rice bran oil and no sunflower seed oil, and the remaining conditions were the same.

Comparative example 39: comparative example 39 was different from example 1 in that the natural vegetable oil and fat did not contain sunflower seed oil and soybean oil, and the other conditions were the same.

Comparative example 40: comparative example 40 was compared with example 1, except that the natural vegetable oil and fat contained no rice bran oil and soybean oil, and the other conditions were the same.

Moisturizing performance tests and moisture loss tests were performed on moisturizing bath oils of example 1, examples 11 to 12 and comparative examples 33 to 40, and the test results are shown in table 11 below:

table 11 results of moisturizing Performance test of moisturizing bath oil, moisture loss test of example 1, examples 11 to 12 and comparative examples 33 to 40

As can be seen from the test results in Table 11, the moisture retention and moisturizing bath oil has low moisture content increase rate, and large skin moisture loss, without adding the hybrid lavender oil and cedar wood oil (comparative example 33), without adding the cedar wood oil (comparative example 34), without adding the rice bran oil (comparative example 35), without adding the sunflower seed oil (comparative example 36), without adding the soybean oil (comparative example 37), without adding the rice bran oil and the sunflower seed oil (comparative example 38), without adding the sunflower seed oil and the soybean oil (comparative example 39), and without adding the rice bran oil and the soybean oil (comparative example 40). Wherein, the lack of two natural vegetable oils has a greater impact on the moisturizing properties and moisture loss of the bath oil than the lack of a single ingredient. Also, the lack of rice bran oil and sunflower seed oil has a greater impact on bath oil.

7. Effect of nonionic thickener content on bath oil Effect

Example 13: example 13 is different from example 1 in that the bath oil contains 3.5% by weight of nonionic thickener, with the remaining conditions being the same.

Example 14: example 14 differs from example 1 in that the bath oil contains 0.65% by weight of nonionic thickener, with the remaining conditions being the same.

Comparative example 41: comparative example 41 differs from example 1 in that it does not contain a nonionic thickener.

Comparative example 42: comparative example 42 differs from example 1 in that the bath oil contains 0.3% by weight of nonionic thickener, with the remaining conditions being the same.

Comparative example 43: comparative example 43 was compared to example 1, except that the bath oil had a nonionic thickener content of 4.5% by weight, with the remaining conditions being the same.

The moisturizing bath oils of example 1, examples 13 to 14 and comparative examples 41 to 43 were subjected to appearance observation and mildness test, foam property test, moisturizing test and moisture loss test, respectively, and the test results are shown in tables 12 to 14:

table 12 results of the appearance observation and mildness test of moisturizing bath oils of example 1, examples 13-14 and comparative examples 41-43

From the test results of table 12, it is understood that the nonionic thickener in the examples of the present invention was added in an amount consistent with the texture of oil and had no/light irritation. The nonionic thickener is added in a small amount, and the nonionic thickener is added in a large amount when the content is less than 0.5% (comparative example 42) and the nonionic thickener is added in a large amount when the content is more than 4% (comparative example 43), and the nonionic thickener has a large influence on the mildness of the bath oil and has a moderate irritation, so that the weight percentage of the nonionic thickener in the bath oil is preferably 0.5 to 4%.

Table 13 test of moisturizing bath oil foam Performance of example 1, examples 13-14 and comparative examples 41-43

As can be seen from the test results in Table 13, the bath oil in the examples of the present invention has the advantages of rapid foaming, high foam content and fine foam. The amount of nonionic thickener added in the moisturizing bath oil is small, and the amount of nonionic thickener added is large when the content is lower than 0.5% (comparative example 42) and the amount of nonionic thickener added is large when the content is higher than 4% (comparative example 43), so that the weight percentage of nonionic thickener in the bath oil is preferably 0.5% -4%.

Table 14 moisturizing bath oil moisturizing Performance test, moisture loss test of example 1, examples 13-14 and comparative examples 41-43

As can be seen from the test results in Table 14, the bath oil in the examples of the present invention has a high rate of increase in moisture content and less loss of skin moisture. The non-ionic thickener in the moisturizing bath oil has small addition amount, and the moisture content increase rate is low when the content is lower than 0.5 percent (comparative example 42), so that the skin moisture loss amount is large. The nonionic thickener is added in a large amount, and when the content is higher than 4% (comparative example 43), the effect on the moisture content increase rate and the skin moisture loss amount is small, so that the weight percentage of the nonionic thickener in the bath oil is preferably 0.5 to 4%.

8. Compared with commercially available bath oil and clear water

The moisturizing bath oil of example 1 was subjected to appearance observation and mildness test, foam property and heat feeling upon washing, moisturizing property test and moisture loss test with commercially available bath oil (comparative example 44) and clear water (comparative example 45), respectively, and the test results are shown in tables 15 to 17 below:

table 15 example 1, comparative example 44-comparative example 45 appearance observations and mildness tests

Examples/comparative examples	Appearance of	ES value	Stimulation determination
				Example 1	Like transparent oil	7	No/light irritation
Comparative example 44	Like transparent oil	11	No/light irritation
				Comparative example 45	Water form	3	No/light irritation

TABLE 16 foam Performance and heat on wash test for example 1, comparative example 44-comparative example 45

Table 17 example 1, comparative example 44-comparative example 45 moisture retention test, moisture loss test

As can be seen from the test results of tables 15 to 17, the moisturizing bath oil of the present invention has excellent heat feeling and moisturizing performance as compared with the commercially available bath oil and clear water.

The test results show that the moisturizing bath oil adopting the technical scheme disclosed by the invention has the oily texture similar to that of oil, and has mild cleaning force, fast foaming, fine foam, good moisturizing feel and heating feel and obvious moisturizing effect. The bath oil lacking one or more components of the amphoteric surfactant, the nonionic surfactant, the synthetic oil, the glycerin, the natural vegetable oil and the nonionic thickener is difficult to realize the ideal effects of excellent foaming effect, heating effect, moisturizing feel, moisturizing degree and mildness.

In conclusion, the moisturizing bath oil realizes proper mild cleaning force and foam effect through the mutual synergistic effect of different components; the synthetic grease, the glycerol and the natural vegetable grease are reasonably matched, so that the moist feel and the heating feel during bath oil washing are ensured; the non-ionic thickener is also added to ensure that the bath oil has a certain viscosity and accords with the texture of the oil; furthermore, the essence and the rose water are matched to generate a synergistic effect, so that a user can relax during washing, and the skin is subjected to lasting moisturizing after washing, so that the skin is moistened; finally, the weak acid system of the bath oil is stable and safe for a long time by adding the preservative and the citric acid.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. The moisturizing bath oil is characterized by comprising the following components in percentage by weight:

2. The moisturizing and moisturizing bath oil according to claim 1, wherein the amphoteric surfactant is sodium cocoyl amphoacetate; the nonionic surfactant is selected from one or more of cocoamidomethyl MEA, coco glucoside and polysorbate-20.

3. The moisturizing bath oil of claim 2, wherein the nonionic surfactant consists of cocamidomethyl MEA, coco glucoside, and polysorbate-20; the weight ratio of the cocoamidomethyl MEA, coco glucoside and polysorbate-20 is 1: (3-6): (2-5).

4. The moisturizing and moisturizing bath oil according to claim 1, wherein the weight ratio of the nonionic surfactant to the amphoteric surfactant is 1:2.

5. the moisturizing bath oil according to claim 1, wherein the weight ratio of the natural vegetable oil to the synthetic oil to the glycerin is 1: (8-28): (18-54).

6. The moisturizing and moisturizing bath oil according to claim 5, wherein the synthetic oil comprises PEG-7 glycerol cocoate, tocopheryl acetate, and a mixture of cocoyl glucoside and glycerol oleate, and the weight ratio of the tocopheryl acetate, PEG-7 glycerol cocoate, and the mixture of cocoyl glucoside and glycerol oleate is 1: (45-70): (5-15).

7. The moisturizing bath oil of claim 6, wherein the natural vegetable oil is composed of a hybrid lavender oil, rice bran oil, sunflower seed oil, soybean oil, cedar wood oil.

8. The moisturizing bath oil of claim 1, wherein the nonionic thickener is a mixture of PEG/PPG-120/10 trimethylolpropane trioleate and laureth-2.

9. The moisturizing bath oil according to claim 1, wherein the preservative is one or more selected from sodium benzoate and phenoxyethanol.

10. The method for preparing the moisturizing bath oil according to any one of claims 1 to 9, comprising the steps of:

s1, preparing materials according to weight percentage;