CN115040426A

CN115040426A - Skin cleaning composition based on soap-based system

Info

Publication number: CN115040426A
Application number: CN202210657714.4A
Authority: CN
Inventors: 王耀; 张毅; 许佳萍; 黄球明
Original assignee: Guangdong Gadetin Daily Necessities Co ltd
Current assignee: Guangdong Gadetin Daily Necessities Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-09-13

Abstract

The invention relates to the technical field of cosmetics, in particular to the field of IPC A61K8, and more particularly relates to a skin cleaning composition based on a soap base system. The soap-based system-based skin cleansing composition prepared by the invention is prepared from 20-35 wt% of fatty acid, 15-25 wt% of polyhydric alcohol, 0-1.5 wt% of emulsifier, 5-8 wt% of alkali, 1-3 wt% of emollient, 0.05-0.5 wt% of thickener, 0-3 wt% of surfactant, 0.01-0.1 wt% of chelating agent, 0-0.01 wt% of preservative, 0.001-0.01 wt% of essence, 0.001-0.01 wt% of fatting agent, 0.001-0.01 wt% of conditioner and the balance of water to 100 wt%. According to the invention, the neutralization degree of the prepared skin cleaning composition is kept at a proper level by adjusting the proportion of each raw material in the system, and the stability of the system at high and low temperatures and normal temperature is improved.

Description

Skin cleaning composition based on soap-based system

Technical Field

The invention relates to the technical field of cosmetics, in particular to the field of IPC A61K8, and more particularly relates to a skin cleaning composition based on a soap base system.

Background

The soap-based facial cleanser currently sold on the market is mainly prepared by neutralizing fatty acid (stearic acid, palmitic acid, myristic acid and lauric acid) and alkali under the conditions of water and polyhydric alcohol, cooling and pasting.

In the prior art, patent application publication No. CN107157799A discloses a soap-based facial cleanser, which is prepared by compounding an emulsifier, and the prepared soap-based facial cleanser is not tight after use, has low irritation, but has limited improvement on stability.

Patent application publication No. CN113712864A discloses a soap-based facial cleanser which has reduced irritation to the skin and simultaneously reduced feeling of tightness after washing and good cleansing power by adding peach gum extract, optionally, Dixian palm extract as an anti-irritation composition. However, the addition of plant extracts affects the stability of the system.

However, the soap-based facial cleanser is layered at high temperature, is watery and coarse at normal temperature, and becomes hard when being frozen. The reason is that a small amount of fatty acid in the soap-based facial cleanser still remains unreacted, and can be separated by layering and demulsification in the high-temperature and standing process or be crystallized and separated out into particles under the conditions of refrigeration and normal temperature, so that the structure of the cream body is damaged, and the condition of unstable water seepage occurs.

Disclosure of Invention

In order to solve the above problems, according to a first aspect of the present invention, there is provided a skin cleansing composition based on a soap-based system, which is prepared from, by weight, 20 to 35% of a fatty acid, 15 to 25% of a polyhydric alcohol, 0 to 1.5% of an emulsifier, 5 to 8% of an alkali, 1 to 3% of a softening agent, 0.05 to 0.5% of a thickener, 0 to 3% of a surfactant, 0.01 to 0.1% of a chelating agent, 0 to 0.01% of a preservative, 0.001 to 0.01% of a perfume, 0.001 to 0.01% of an fatting agent, 0.001 to 0.01% of a conditioning agent, and the balance of water to 100%.

Preferably, the fatty acid is one or more of stearic acid, myristic acid, lauric acid, arachidic acid, palmitic acid, palmitoleic acid, linoleic acid and linolenic acid; further preferred are stearic acid, myristic acid and lauric acid.

Preferably, the fatty acid comprises 7-20 parts by weight of stearic acid, 5-18 parts by weight of myristic acid and 1-5 parts by weight of lauric acid.

The applicant finds that the stearic acid and the myristic acid are selected as the fatty acid to be applied to the system, so that the cleaning capability of the prepared skin cleaning composition can be improved, and meanwhile, the pearly luster effect of the prepared skin cleaning composition can be improved. This is probably due to the synergistic effect of the two fatty acids, which results in a stable foam and at the same time a shiny pearlescent appearance. However, the two fatty acids have relatively high molecular weights, and the solubility of the two fatty acids in the system is affected after the two fatty acids are placed at normal temperature for a long time, so that the skin cleaning composition is coarse. Applicants have unexpectedly found that when a certain amount of lauric acid is added, and the fatty acids comprise, by weight, 7-20 parts stearic acid, 5-18 parts myristic acid, and 1-5 parts lauric acid, the skin cleansing composition prepared not only has a shiny pearlescent appearance, but also has a high degree of foam stability and good stability at both normal and high temperatures.

Preferably, the alkali is one or more of potassium hydroxide, sodium hydroxide and triethanolamine; further preferably, it is potassium hydroxide.

Preferably, the weight of the base is 18-25% of the weight of the fatty acid.

The applicant has surprisingly found that when potassium hydroxide is used as the base, the prepared skin cleansing composition is suitable in hardness and softness, and can be prevented from discoloring after being placed for a long time. However, too much alkali can irritate the skin, while too little alkali can cause instability of the system. The applicant unexpectedly finds that when the weight of the alkali in the raw materials is 18-25% of that of the fatty acid, the neutralization degree of the system can be adjusted, the unstable phenomenon caused by the unreacted excessive fatty acid is avoided, the paste forming point of the system is also adjusted, and the smooth operation of the production process is ensured.

Preferably, the polyhydric alcohol is one or more of glycerol, ethylene glycol, pentaerythritol, 1, 4-butanediol, 1, 6-hexanediol, neopentyl glycol, diethylene glycol and dipropylene glycol; further preferably, glycerol is used.

The applicants have surprisingly found that the use of glycerol as the polyol, in an amount of from 15 to 25% by weight of the skin cleansing composition, results in improved dispersion stability of the system while dissolving the fatty acid. This is probably because the soap formed during saponification is slightly soluble in water and if it is not dispersed and dissolved in time, it will affect the progress of saponification, on the one hand, it will delay the progress of production, and on the other hand, too much fatty acid will not dissolve, which will affect the high and low temperature stability of the prepared skin cleansing composition.

Preferably, the emulsifier is one or more of glyceryl stearate, PEG-100 stearate, sodium dodecyl benzene sulfonate, polyoxyethylene ether, polyoxypropylene ether, sorbitan monooleate and sorbitan monooleate; further preferred are glyceryl stearate and PEG-100 stearate.

Preferably, the softening agent is one or more of trihydroxystearin, squalane, glyceride and olive oil; more preferably, trihydroxystearin.

Preferably, the thickening agent is one or more of hydroxypropyl methyl cellulose, xanthan gum, carbomer, sodium carboxymethyl cellulose and N-methylene bisacrylamide; more preferably, hydroxypropyl methylcellulose is used.

In some preferred schemes, a certain amount of trihydroxystearin and hydroxypropyl methylcellulose are selected as a softener and a thickener respectively, and the synergistic effect of the trihydroxystearin and the hydroxypropyl methylcellulose can improve the stability of the prepared skin cleaning composition at high and low temperatures, improve the stability of the skin cleaning composition at normal temperature, and avoid the phenomena of coarseness, water outflow and the like.

Preferably, the surfactant is one or more of sodium cocoyl methyl taurate, sodium lauroyl sarcosinate, sodium lauroyl glutamate, sodium cocoyl glutamate, cocoyl glucoside and lauryl glucoside; further preferred is sodium cocoyl methyl taurate.

Preferably, the chelating agent is disodium EDTA.

Preferably, the preservative is one or more of phenoxyethanol, sodium hydroxymethyl glycinate, hydroxybenzoate, butylated hydroxytoluene and imidazolidinyl urea.

Preferably, the fatting agent is one or more of PEG-7 glyceryl cocoate and bis-PEG-1 methyl ether dimethylsilane.

Preferably, the conditioning agent is one or more of stearyl propyl dimethylamine, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride and behenyl propyl dimethylamine.

In a second aspect the present invention provides a process for the preparation of a skin cleansing composition based on a soap-based system comprising the steps of:

adding the raw materials into an emulsifying pot, heating to 70-90 deg.C, stirring to disperse uniformly, adding essence and antiseptic, and stirring uniformly.

Preferably, the method for preparing the skin cleansing composition based on the soap-based system comprises the following steps:

s1, adding a chelating agent and alkali into water to dissolve, adding polyol, heating to 70-90 ℃, and stirring until the mixture is uniformly mixed to obtain a water phase substance;

s2, mixing fatty acid, an emulsifier, a softening agent, a thickening agent, an ester forming agent and a conditioning agent, heating to 70-90 ℃, stirring until the solution is uniformly mixed, and obtaining an oil phase substance;

s3, adding the water phase substance into the oil phase substance, continuously stirring, keeping the temperature not lower than 85 ℃, stopping stirring and keeping the temperature for 30-80min after the solution is uniform;

s4, adding the surfactant into the solution obtained in the step S3, stirring until the solution is uniform, cooling to below 60 ℃, adding the preservative and the essence, continuing cooling, cooling to below 50 ℃, keeping the temperature unchanged, and stirring for 30-60min to obtain the water-based paint.

Has the advantages that:

1. stearic acid and myristic acid are selected as fatty acids to be applied to the system, so that the cleaning capability of the prepared skin cleaning composition can be improved, and meanwhile, the pearlescent effect of the skin cleaning composition is improved.

2. The skin cleaning composition prepared by compounding stearic acid, myristic acid and lauric acid in specific parts by weight has the advantages of shiny pearlescent appearance, high foam stability and richness, and good stability at normal temperature and high and low temperatures.

3. When the potassium hydroxide is used as the alkali, the prepared skin cleaning composition is proper in hardness, and can be prevented from discoloring due to long-time standing.

4. When the weight of the alkali in the raw materials is controlled to be 18-25% of that of the fatty acid, the neutralization degree of the system can be adjusted, the unstable phenomenon caused by the unreacted excessive fatty acid is avoided, the paste forming point of the system is adjusted, and the smooth operation of the production process is ensured.

5. By selecting glycerol as the polyol, and when the weight of the polyol is 15-25% of the weight of the skin cleaning composition, the dispersion stability of the system can be improved while the fatty acid is dissolved.

6. By selecting a certain amount of trihydroxystearin and hydroxypropyl methylcellulose as a softener and a thickener respectively, the synergistic effect of the trihydroxystearin and the hydroxypropyl methylcellulose can improve the stability of the prepared skin cleaning composition at high and low temperatures, improve the stability of the skin cleaning composition at normal temperature, and avoid the phenomena of coarseness, water outflow and the like.

7. According to the invention, the neutralization degree of the prepared skin cleaning composition is kept at a proper level by adjusting the proportion of each raw material in the system, and the stability of the system at high and low temperatures and normal temperature is improved.

8. The skin cleaning composition based on the soap-based system is suitable for various skins, such as oily skins, sensitive skins, dry skins and the like.

Detailed Description

Examples

Example 1

Example 1 provides a soap-based system based skin cleansing composition prepared from, by weight, 28% fatty acid, 15% polyol, 0.5% emulsifier, 5.57% base, 1.5% emollient, 0.05% thickener, 1.5% surfactant, 0.1% chelating agent, 0.005% preservative, 0.005% perfume, 0.005% fatliquoring agent, 0.005% conditioning agent, and the balance water to 100%.

The fatty acids are stearic acid, myristic acid and lauric acid.

The fatty acid comprises 18 parts of stearic acid, 5 parts of myristic acid and 5 parts of lauric acid in parts by weight.

The stearic acid, myristic acid and lauric acid were purchased from the company sumoli, ad hoc.

The alkali is potassium hydroxide.

The potassium hydroxide was purchased from Yoldeli, Jiangsu.

The polyol is glycerol.

The glycerol was purchased from jacaray, a, gaily, a, b.

The emulsifier is glyceryl stearate and PEG-100 stearate.

The emulsifier was purchased from a170 produced by the supplier procollagen.

The softening agent is trihydroxystearin.

The trihydroxystearin was purchased from forsteriol corporation.

The thickening agent is hydroxypropyl methyl cellulose.

The hydroxypropyl methylcellulose is purchased from dow chemical, usa.

The surfactant is sodium cocoyl methyl taurate.

The cocoyl methyl taurine sodium taurate is purchased from high chemical engineering.

The chelating agent is disodium EDTA.

The preservative is sodium hydroxymethyl glycinate.

The fat-liquoring agent is PEG-7 glycerol cocoate.

The PEG-7 glyceryl cocoate was purchased as a self-winning creative degussa.

The conditioner is cetyl trimethyl ammonium chloride.

The essence is rose essence.

The rose essence was purchased from Shandong Chundao chemical Co., Ltd.

s1, adding a chelating agent and alkali into water to dissolve, adding polyalcohol, heating to 80 ℃, and stirring until the mixture is uniformly mixed to obtain a water phase substance;

s2, mixing fatty acid, an emulsifier, a softening agent, a thickening agent, an ester forming agent and a conditioning agent, heating to 80 ℃, stirring until the solution is uniformly mixed, and obtaining an oil phase substance;

s3, adding the water phase substance into the oil phase substance, continuously stirring, keeping the temperature at 85 ℃, stopping stirring and keeping the temperature for 60min after the solution is uniform;

s4, adding the surfactant into the solution obtained in the step S3, stirring until the solution is uniform, cooling to 60 ℃, adding the preservative and the essence, continuing cooling, cooling to 50 ℃, keeping the temperature unchanged, and stirring for 50min to obtain the water-based organic fertilizer.

Example 2

Example 2 provides a skin cleansing composition based on a soap-based system, the specific embodiment being the same as example 1 except that: the preparation raw materials comprise, by weight, 30% of fatty acid, 15% of polyalcohol, 0.5% of emulsifier, 6.33% of alkali, 1.5% of softening agent, 0.05% of thickening agent, 1.5% of surfactant, 0.1% of chelating agent, 0.005% of preservative, 0.005% of essence, 0.005% of fat-imparting agent, 0.005% of conditioner and the balance of water to 100%.

The fatty acid comprises 7 parts by weight of stearic acid, 18 parts by weight of myristic acid and 5 parts by weight of lauric acid.

Example 3

Example 3 provides a skin cleansing composition based on a soap-based system, the specific embodiment being the same as example 1 except that: the preparation raw materials comprise, by weight, 28% of fatty acid, 15% of polyhydric alcohol, 0.5% of emulsifier, 5.57% of alkali, 0.5% of softening agent, 0.05% of thickening agent, 1.5% of surfactant, 0.1% of chelating agent, 0.005% of preservative, 0.005% of essence, 0.005% of fat-imparting agent, 0.005% of conditioner and the balance of water to 100%.

Example 4

Example 4 provides a skin cleansing composition based on a soap-based system, the specific embodiment being the same as example 1 except that: the preparation raw materials comprise, by weight, 28% of fatty acid, 15% of polyhydric alcohol, 0.5% of emulsifier, 5.57% of alkali, 1.5% of softening agent, 1.5% of surfactant, 0.1% of chelating agent, 0.005% of preservative, 0.005% of essence, 0.005% of fat-endowing agent, 0.005% of conditioner and the balance of water to 100%.

Example 5

Example 5 provides a skin cleansing composition based on a soap-based system, the specific embodiment being the same as example 1 except that: the preparation raw materials comprise, by weight, 28% of fatty acid, 15% of polyalcohol, 0.5% of emulsifier, 5.36% of alkali, 1.5% of softening agent, 0.05% of thickening agent, 1.5% of surfactant, 0.1% of chelating agent, 0.005% of preservative, 0.005% of essence, 0.005% of fat-imparting agent, 0.005% of conditioner and the balance of water to 100%.

The fatty acids are stearic acid and myristic acid.

The fatty acid comprises 20 parts by weight of stearic acid and 8 parts by weight of myristic acid.

Example 6

Example 6 provides a skin cleansing composition based on a soap-based system, the specific embodiment being the same as example 1 except that: the preparation raw materials comprise, by weight, 35% of fatty acid, 15% of polyol, 0.5% of emulsifier, 6.09% of alkali, 1.5% of softening agent, 0.05% of thickening agent, 1.5% of surfactant, 0.1% of chelating agent, 0.005% of preservative, 0.005% of essence, 0.005% of fat-imparting agent, 0.005% of conditioner and the balance of water to 100%.

The fatty acids are stearic acid, myristic acid and lauric acid.

The fatty acid comprises 10 parts by weight of stearic acid, 20 parts by weight of myristic acid and 5 parts by weight of lauric acid.

Example 7

Example 7 provides a skin cleansing composition based on a soap-based system, the specific embodiment being the same as example 1 except that: the preparation raw materials comprise, by weight, 28% of fatty acid, 10% of polyalcohol, 0.5% of emulsifier, 5.57% of alkali, 1.5% of softening agent, 0.05% of thickening agent, 1.5% of surfactant, 0.1% of chelating agent, 0.005% of preservative, 0.005% of essence, 0.005% of fat-imparting agent, 0.005% of conditioner and the balance of water to 100%.

Performance test method

High temperature stability determination

The skin cleansing compositions prepared in examples 1 to 7 were left at 48 ℃ for 4 weeks and then taken out to observe whether or not they were stratified, thickened, hardened, and washed out, and the results were shown in Table 1.

Low temperature stability assay

The skin cleansing compositions prepared in examples 1 to 7 were left at 5 ℃ for 4 weeks and then taken out to observe whether or not they were stratified, thickened, hardened, and washed out, and the results were shown in Table 1.

Measurement of stability at Normal temperature

The skin cleansing compositions prepared in examples 1 to 7 were left in an environment of 25 ℃ for 12 weeks and then were taken out to observe whether or not they were stratified, thickened, hardened, and washed out, and the results were shown in Table 1.

TABLE 1 stability determination

	High temperature stability	Stability at Low temperature	Stability at Normal temperature
				Example 1	Stabilization	Stabilization	Stabilization of
Example 2	Stabilization	Stabilization	Stabilization
				Example 3	Layering	Become coarse	Stabilization
Example 4	Stabilization	Stabilization	Discharging water
				Example 5	Stabilization	Stabilization	Become coarse
Example 6	Stabilization	Stabilization	Become coarse
				Example 7	Become coarse	Hair hardness	Stabilization

Claims

1. A skin cleaning composition based on a soap-based system is characterized in that the skin cleaning composition is prepared from 20-35% of fatty acid, 15-25% of polyalcohol, 0-1.5% of emulsifier, 5-8% of alkali, 1-3% of emollient, 0.05-0.5% of thickening agent, 0-3% of surfactant, 0.01-0.1% of chelating agent, 0-0.01% of preservative, 0.001-0.01% of essence, 0.001-0.01% of fat-imparting agent, 0.001-0.01% of conditioning agent and the balance of water to 100% by weight.

2. The soap-based system skin cleansing composition of claim 1, wherein the fatty acid is one or more of stearic acid, myristic acid, lauric acid, arachidic acid, palmitic acid, palmitoleic acid, linoleic acid, linolenic acid.

3. The soap-based system skin cleansing composition according to claim 2, wherein the fatty acids comprise 7-20 parts stearic acid, 5-18 parts myristic acid and 1-5 parts lauric acid by weight.

4. A soap-based system skin cleansing composition according to claim 3 wherein the base is one or more of potassium hydroxide, sodium hydroxide, triethanolamine.

5. A soap-based system skin cleansing composition according to claim 4 wherein the weight of base is 18-25% of the weight of fatty acid.

6. A soap-based system-based skin cleansing composition according to any of claims 1 to 5 wherein said polyhydric alcohol is one or more of glycerol, ethylene glycol, pentaerythritol, 1, 4-butanediol, 1, 6-hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol.

7. The soap-based system skin cleansing composition of claim 6 wherein the emollient is one or more of trihydroxystearin, squalane, glycerides, olive oil.

8. The soap-based system skin cleansing composition according to claim 7, wherein the thickener is one or more of hydroxypropyl methylcellulose, xanthan gum, carbomer, sodium carboxymethylcellulose, N-methylene bisacrylamide.

9. The soap-based skin cleansing composition according to claim 8 wherein the surfactant is one or more of sodium cocoyl methyl taurate, sodium lauroyl sarcosinate, sodium lauroyl glutamate, sodium cocoyl glutamate, coco glucoside, and lauryl glucoside.

10. A process for the preparation of a soap-based system based skin cleansing composition according to any one of claims 1 to 9 comprising the steps of: