阅读说明：本技术 一种具有柔顺修护亮泽功效的双层护发油及其制备方法 (Double-layer hair care oil with effects of smoothing, repairing and brightening and preparation method thereof ) 是由 李强 金淑芳 钟欢欢 万岳鹏 于 2021-08-17 设计创作，主要内容包括：本发明涉及化妆品领域,具体公开了一种具有柔顺修护亮泽功效的双层护发油及其制备方法。双层护发油包括上层油相和下层水相,油相包括甲基硅油、挥发性烷烃和氢化聚异丁烯。双层护发油的制备方法,包括以下步骤：先分别制得水相组合物和油相组合物,再将两者混合,制得双层护发油。本发明的护发油采用不相混溶且存在密度差的水相和油相两类原料,使其形成上层油相和下层水相的双层结构,各油相原料选取密度相近,相容性好的甲基硅油、挥发性烷烃和氢化聚异丁烯,通过复配组合,各原料从清爽度、丝滑感、滋润度三个功效维度,并与水相协同增效,从而达到了整体协同性能增强的综合效果。(The invention relates to the field of cosmetics, and particularly discloses a double-layer hair care oil with effects of smoothing, repairing and brightening and a preparation method thereof. The double-layer hair care oil comprises an upper oil phase and a lower water phase, wherein the oil phase comprises methyl silicone oil, volatile alkane and hydrogenated polyisobutene. The preparation method of the double-layer hair care oil comprises the following steps: preparing water phase composition and oil phase composition, respectively, and mixing the two compositions to obtain the double-layer hair care oil. The hair care oil adopts two types of raw materials of water phase and oil phase which are immiscible and have density difference, so that the two types of raw materials form a double-layer structure of an upper oil phase and a lower water phase, the raw materials of the oil phase are methyl silicone oil, volatile alkane and hydrogenated polyisobutene which have similar density and good compatibility, and through compounding and combination, the raw materials have three effect dimensions of freshness, silky feeling and moisture and are synergistic with the water phase, so that the comprehensive effect of enhancing the integral synergistic performance is achieved.)

1. A double-layer hair care oil is characterized in that: the double-layer hair care oil comprises an upper oil phase and a lower water phase, wherein the oil phase comprises methyl silicone oil, volatile alkane and hydrogenated polyisobutene.

2. The dual layer hair care oil of claim 1, wherein: the aqueous phase comprises a polyol and sodium chloride;

preferably, the polyhydric alcohol is at least one selected from propylene glycol, butylene glycol and 1, 3-propylene glycol.

3. The dual layer hair care oil of claim 1, wherein: the volatile alkane is at least one of isododecane, undecane and tridecane.

4. The dual layer hair care oil of claim 1, wherein: the methyl silicone oil comprises penta-dimethyl siloxane and/or polydimethylsiloxane.

5. The dual layer hair care oil of claim 4, wherein: the oil phase comprises the following components in parts by weight: 10-35 parts of pentamethyldimethicone, 1-15 parts of polydimethylsiloxane, 10-35 parts of volatile alkane and 0.2-2 parts of hydrogenated polyisobutene.

6. The dual layer hair care oil of claim 2, wherein: the water phase comprises the following components in parts by weight: 1-5 parts of polyhydric alcohol and 0.1-1.5 parts of sodium chloride.

7. The dual layer hair care oil of claim 1, wherein: the mass ratio of the water phase to the oil phase is (4-5): (5-6).

8. The dual layer hair care oil of claim 1, wherein: the double-layer hair care oil also comprises at least one of preservative, essence, pH value regulator, pigment and deionized water.

9. A process for the preparation of a bilayer hair care oil according to any one of claims 1 to 8 wherein: the method comprises the following steps:

mixing the raw materials of the water phase to obtain a water phase composition;

mixing the oil phase raw materials to obtain an oil phase composition;

mixing the oil phase composition and the water phase composition to obtain the double-layer hair care oil.

10. A process for preparing a bilayer hair care oil of claim 9 comprising: the method comprises the following steps:

mixing the raw materials of the water phase, heating while stirring until the raw materials are completely dissolved, heating to 75-85 ℃, stopping heating, keeping the temperature for 5-10 minutes, then cooling, cooling to 35-40 ℃, adding a preservative, and stirring to obtain a water phase composition;

stirring and mixing the raw materials of the oil phase to prepare an oil phase composition;

and (2) taking the water phase composition and the oil phase composition according to the mass ratio, filling the water phase composition and then filling the oil phase composition to obtain the double-layer hair care oil.

Technical Field

The invention relates to the field of cosmetics, in particular to double-layer hair care oil with effects of smoothing, repairing and brightening and a preparation method thereof.

Background

With the improvement of living standard of people, the hair care demand of consumers is higher and higher. The hair is natural polymer keratin fiber, covers the scalp, and has effects of preventing scalp from heat dissipation, protecting scalp from injury, and beautifying. The hair keratin fiber is inactive, but light, hot air, acid, alkali, oxidant and reductant can damage hair. The hair is often damaged to different degrees by hair ironing, dyeing, straightening, curling, hair drying and the like in life. The main manifestations are: on one hand, the scales of the hair epidermis are damaged and tilted, the hair is frightened and difficult to comb, and dull and lusterless; on the other hand, after the keratin fiber structure is damaged, the toughness and the strength of hair are obviously reduced, and the hair is fragile and easy to break.

In the current hair repair technology, products such as shampoo, conditioner, hair mask and the like are used for repairing damaged hair through the electrostatic attraction of cationic conditioners to the hair, or are used for providing hair care oil-resident products to prevent the further damage of the hair. The commercially available hair care oil is mostly single-layer homogeneous phase hair care oil, and some double-layer hair care oil is also available, and research and test show that the upper layer of the existing double-layer hair care oil generally adopts a pure silicone oil system, the lower layer of the existing double-layer hair care oil is a water phase, and the appearance layer is not easy to layer or the interface of the oil phase and the water phase is fuzzy after layering. In the actual use process, as the oil and the water are mixed, the smooth, repair and gloss effects are not ideal; on the other hand, after the hair care product is used, the hair is sticky and is difficult to dry, the refreshing degree is poor, the hair is easy to become strands, and the experience feeling is poor.

Therefore, there is a need to develop a refreshing double-layer hair care oil with a combination of softness, repair and shine.

Disclosure of Invention

The invention provides a double-layer hair care oil with effects of smoothing, repairing and brightening and a preparation method thereof, which are used for solving one or more technical problems in the prior art and at least providing a beneficial choice or creating conditions.

In order to overcome the technical problems, the invention provides a double-layer hair care oil in a first aspect.

The double-layer hair care oil comprises an upper oil phase and a lower water phase, wherein the oil phase comprises cyclomethicone oil, volatile alkane and hydrogenated polyisobutene.

The hair care oil adopts two types of raw materials of water phase and oil phase which are immiscible and have density difference, so that the two types of raw materials form a double-layer structure of an upper oil phase and a lower water phase, and compared with single-layer uniform oil phase hair care oil, the oil content of the double-layer structure is lower, so that hair is more fresh and not greasy. However, the key problem to be solved by the invention is how to ensure the effects of smoothness, restoration and luster of the hair care oil while reducing the oil content.

The oil phases of the invention have similar raw material density and good compatibility, and the effect of enhancing the overall synergistic performance is achieved by compounding and combining. Specifically, the methyl silicone oil is added, the unique molecular structure of the methyl silicone oil is utilized, the hair compatibility is good, and the softening, repairing and brightening effects of an oil phase can be changed; the volatile alkane has small molecular weight, small density and strong volatility, and is beneficial to changing the density and the freshness of an oil phase; the hydrogenated polyisobutene has good affinity with hair and high moistening degree, and can further improve the effects of smoothness, repair and luster of the upper oil phase of the hair care oil. On one hand, the refreshing degree of the hair care oil is improved by utilizing the strong volatility of the volatile alkane; on the other hand, the methyl silicone oil can bring silky touch to hair; hydrogenated polyisobutene is non-silicone oil grease, has a good moistening effect, and meanwhile, the water phase and the oil phase act together to achieve synergistic interaction from three effect dimensions of freshness, silky feeling and moistening degree, so that excellent comprehensive performance is obtained.

As a further improvement of the above, the aqueous phase comprises a polyol and sodium chloride.

The water phase of the hair care oil adopts the polyhydric alcohol and the sodium chloride, and the density and the polarity of the polyhydric alcohol and the sodium chloride are utilized to ensure that the lower-layer water phase and the upper-layer oil phase of the hair care oil are immiscible, have clear interfaces and form larger density difference to ensure that the oil phase and the water phase can be obviously layered. Specifically, the density of the propylene glycol is greater than that of water, and the propylene glycol is used for adjusting the density of the water phase, so that the density of the water phase is far greater than that of the oil phase, and the sodium chloride is used for adjusting the polarity of the water phase solution, so that the compatibility of the components of the water phase and the components of the oil phase is avoided, and the layering effect is not influenced. The layering effect is obvious, the appearance color value of the double-layer exterior-protecting oil is favorably improved, the color of the lower-layer water phase can be randomly adjusted in the later product preparation process, and the application range is expanded.

Preferably, the polyhydric alcohol is at least one selected from propylene glycol, butylene glycol and 1, 3-propylene glycol. The polyols are all higher in density than water, and are beneficial to promoting the layering effect of the water phase and the oil phase when the density of the water phase is adjusted.

As a further improvement of the above aspect, the volatile alkane is selected from at least one of isododecane, undecane, and tridecane. The alkanes have stronger volatility, are beneficial to changing the density and the freshness of an oil phase, reduce the sticky feeling of hair, are easy to blow and dry and have better experience.

As a further improvement of the above aspect, the methyl silicone oil includes penta-dimethyl siloxane and/or polydimethylsiloxane. The density of the penta-dimethyl siloxane and the polydimethylsiloxane is similar to that of volatile alkane and hydrogenated polyisobutene, the density is good, the compatibility is good, and meanwhile, the unique molecular structure of the penta-dimethyl siloxane and the polydimethylsiloxane can change the softening, repairing and brightening effects of an oil phase.

As a further improvement of the above scheme, the oil phase comprises, in parts by weight: 10-35 parts of pentamethyldimethicone, 1-15 parts of polydimethylsiloxane, 10-35 parts of volatile alkane and 0.2-2 parts of hydrogenated polyisobutene.

Specifically, the optimal proportioning relation among the raw materials of each oil phase is controlled, and the raw materials are synergistic, so that the prepared hair care oil not only has better effects of smoothness, repair and brightness, but also has obvious improvement on the aspect of using freshness.

Preferably, the oil phase comprises the following components in parts by weight: 10-30 parts of pentamethyldimethicone, 1-10 parts of polydimethylsiloxane, 10-30 parts of volatile alkane and 0.2-2 parts of hydrogenated polyisobutene.

More preferably, the oil phase comprises the following components in parts by weight: 12-30 parts of pentamethyldimethicone, 3-10 parts of polydimethylsiloxane, 12-30 parts of volatile alkane and 0.2-1.5 parts of hydrogenated polyisobutene.

As a further improvement of the above scheme, the aqueous phase comprises, in parts by weight: 1-5 parts of polyhydric alcohol and 0.1-1.5 parts of sodium chloride.

Specifically, the density and polarity of the water phase are controlled by adjusting the proportion relation of the polyhydric alcohol and the sodium chloride in the water phase, so that the immiscible effect of the water phase and the oil phase is better, and the obvious layering effect of the water phase and the oil phase is realized.

Preferably, the aqueous phase comprises the following components in parts by weight: 1-4 parts of polyhydric alcohol and 0.1-1.5 parts of sodium chloride.

As a further improvement of the above scheme, the mass ratio of the water phase to the oil phase is (4-5): (5-6). Research experiments show that the double-layer hair care oil with good softening, repairing, brightening and refreshing effects can be obtained when the mass ratio of the water phase to the oil phase is in the range.

As a further improvement of the scheme, the double-layer hair care oil also comprises at least one of preservative, essence, pH value regulator, pigment and deionized water. The preservative, the essence, the pH value regulator and the pigment are all auxiliary agents of the hair care oil, and each auxiliary agent mainly plays the respective effect of the hair care oil, so that the performances of corrosion prevention, acidity and alkalinity, fragrance, color and the like of the hair care oil are further improved.

Preferably, the preservative is selected from sodium benzoate and/or phenoxyethanol.

Preferably, the pH value regulator is selected from citric acid and/or sodium citrate; the pigment is selected from common pigments in hair care products.

In a second aspect of the invention, a method for preparing a dual-layer hair care oil is provided.

Specifically, the preparation method of the double-layer hair care oil comprises the following steps:

mixing the raw materials of the water phase to obtain a water phase composition;

mixing the oil phase raw materials to obtain an oil phase composition;

mixing the oil phase composition and the water phase composition to obtain the double-layer hair care oil.

Further, the preparation method of the double-layer hair care oil comprises the following steps:

mixing the raw materials of the water phase, heating while stirring until the raw materials are completely dissolved, heating to 75-85 ℃, stopping heating, keeping the temperature for 5-10 minutes, then cooling, cooling to 35-40 ℃, adding a preservative, and stirring to obtain a water phase composition;

stirring and mixing the oil phase raw materials at room temperature to obtain an oil phase composition;

and (2) taking the water phase composition and the oil phase composition according to the mass ratio, filling the water phase composition and then filling the oil phase composition to obtain the double-layer hair care oil.

Preferably, the preparation method of the double-layer hair care oil comprises the following steps:

adding deionized water, citric acid, sodium benzoate, sodium chloride and propylene glycol into an emulsifying pot, heating while stirring until completely dissolved, heating to 80 deg.C, stopping heating, holding for 10 min, cooling to 38 deg.C, adding phenoxyethanol, and stirring to obtain water phase composition;

adding cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane, hydrogenated polyisobutene and essence into an oil phase pot at room temperature, stirring and mixing uniformly, detecting physical and chemical indexes, discharging after the physical and chemical indexes are qualified, and preparing an oil phase composition;

and taking the water phase composition and the oil phase composition according to the mass ratio, canning the water phase composition, and canning the oil phase composition to obtain the double-layer hair care oil.

Compared with the prior art, the technical scheme of the invention at least has the following technical effects or advantages:

the hair care oil adopts two types of raw materials of water phase and oil phase which are immiscible and have density difference, so that the two types of raw materials form a double-layer structure of an upper oil phase and a lower water phase, and the hair care oil is relatively single-layer uniform, has lower oil content and enables hair to be more fresh and greasy. According to the invention, cyclopentadimethylsiloxane, polydimethylsiloxane, volatile alkane and hydrogenated polyisobutene which are similar in density and good in compatibility are selected as raw materials of the oil phase, and through compounding and combination, the raw materials have three effect dimensions of freshness, silky feeling and moisture degree and the synergistic effect of the water phase, so that the comprehensive effect of enhancing the overall synergistic performance is achieved. The instant softening effect of the double-layer hair care oil can reach 0.50, the instant glossiness can be improved by 50.5 percent, the glossiness can be improved by 59.9 percent within 1 hour, and the sensory integral evaluation result is higher than that of similar products sold in the market.

Drawings

FIG. 1 is an SEM image of the surface topography of hair after application of a double layer of hair conditioner of comparative example 1;

fig. 2 is an SEM image of the surface topography of the hair after application of the double layer of hair conditioner of example 1.

Detailed Description

The present invention is described in detail below by way of examples to facilitate understanding of the present invention by those skilled in the art, and it is to be specifically noted that the examples are provided only for the purpose of further illustrating the present invention and are not to be construed as limiting the scope of the present invention.

Example 1

A double-layer hair oil comprises the raw materials shown in Table 1.

A preparation method of double-layer hair care oil comprises the following steps:

adding deionized water, citric acid, sodium benzoate, sodium chloride and propylene glycol into an emulsifying pot, heating while stirring until completely dissolved, heating to 80 deg.C, stopping heating, holding for 10 min, cooling to 38 deg.C, adding phenoxyethanol, and stirring to obtain water phase composition;

adding cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane, hydrogenated polyisobutene, essence and the rest components into an oil phase pot at room temperature, stirring and mixing uniformly, detecting physical and chemical indexes, discharging after qualification, and preparing an oil phase composition;

according to the mass ratio of 4: 6 weighing the water phase composition and the oil phase composition, canning the water phase composition and then the oil phase composition to obtain the double-layer hair care oil.

Example 2

A double-layer hair oil comprises the raw materials shown in Table 1.

A preparation method of double-layer hair care oil comprises the following steps:

adding deionized water, citric acid, sodium benzoate, sodium chloride and propylene glycol into an emulsifying pot, heating while stirring until completely dissolved, heating to 75 deg.C, stopping heating, keeping the temperature for 10 min, cooling to 40 deg.C, adding phenoxyethanol, and stirring to obtain water phase composition;

adding cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane, hydrogenated polyisobutene, essence and the rest components into an oil phase pot at room temperature, stirring and mixing uniformly, detecting physical and chemical indexes, discharging after qualification, and preparing an oil phase composition;

according to the mass ratio of 5: 5 weighing the water phase composition and the oil phase composition, canning the water phase composition and then the oil phase composition to obtain the double-layer hair care oil.

Example 3

A double-layer hair oil comprises the raw materials shown in Table 1.

A preparation method of double-layer hair care oil comprises the following steps:

adding deionized water, citric acid, sodium benzoate, sodium chloride and propylene glycol into an emulsifying pot, heating while stirring until completely dissolved, heating to 85 deg.C, stopping heating, holding for 8 min, cooling to 35 deg.C, adding phenoxyethanol, and stirring to obtain water phase composition;

adding cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane, hydrogenated polyisobutene, essence and the rest components into an oil phase pot at room temperature, stirring and mixing uniformly, detecting physical and chemical indexes, discharging after qualification, and preparing an oil phase composition;

according to the mass ratio of 4.5: 5.5 weighing the water phase composition and the oil phase composition, canning the water phase composition and then the oil phase composition to obtain the double-layer hair care oil.

Table 1: raw Material composition Table of the two-layer Hair oil of examples 1 to 3

The raw material compositions of the following examples 4-9 are shown in table 2, wherein: the hair care oils of examples 4-5 were prepared in the same manner as in example 1, and the hair care oils of examples 6-9 were prepared in the same manner as in example 2.

Example 4

The starting material composition of example 4 was compared to example 1 without the addition of propylene glycol.

Example 5

The composition of the starting material of example 5 was comparable to that of example 1 without the addition of sodium chloride.

Example 6

The raw material composition of example 6 was 0.05 parts, which was lower in sodium chloride content than that of example 2.

Example 7

The starting material composition of example 7 was 1.6 parts, which was higher in sodium chloride content than that of example 2.

Example 8

The raw material composition of example 8 was 0.5 parts by weight, which was lower in the content of propylene glycol than that of example 2.

Example 9

The feed composition of example 9 was 5.5 parts higher in propylene glycol content than that of example 2.

Table 2: raw Material composition Table of two-layer Hair oil for examples 4 to 9

Raw materials (parts)	Example 4	Example 5	Example 6	Example 7	Example 8	Example 9
							Cyclopenta dimethyl siloxane	10.0	10.0	16.0	16.0	16.0	16.0
Polydimethylsiloxane	1.5	1.5	5.0	5.0	5.0	5.0
							Isododecane	10.0	10.0	15.0	15.0	15.0	15.0
Hydrogenated polyisobutenes	0.2	0.2	0.3	0.3	0.3	0.3
							Propylene glycol	0	1.0	2.0	2.0	0.5	5.5
Sodium chloride	0.2	0	0.05	1.6	0.8	0.8
							Sodium benzoate	0.1	0.1	0.1	0.1	0.1	0.1
Phenoxyethanol	0.2	0.2	0.2	0.2	0.2	0.2
							Citric acid	0.02	0.02	0.02	0.02	0.02	0.02
Essence	0.1	0.1	0.1	0.1	0.1	0.1
							Pigment	0.02	0.02	0.02	0.02	0.02	0.02
Deionized water	77.66	76.86	61.21	59.66	61.96	56.96

The following raw material compositions of comparative examples 1 to 4 are shown in table 3, and the preparation methods of the two-layer hair care oils of comparative examples 1 to 4 are the same as those of example 1.

Comparative example 1

The composition of the starting material of comparative example 1 is comparable to example 1 without the addition of cyclopentadimethylsiloxane.

Comparative example 2

The composition of the starting material of comparative example 2 is comparable to that of example 1, without the addition of polydimethylsiloxane.

Comparative example 3

The starting material composition of comparative example 3 was compared to example 1 without addition of isododecane.

Comparative example 4

The starting material composition of comparative example 4 is comparable to example 1 without the addition of hydrogenated polyisobutene.

Table 3: raw material composition table of the two-layer hair care oils of comparative examples 1 to 4

Raw materials (parts)	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4
					Cyclopenta dimethyl siloxane	0	10.0	10.0	10.0
Polydimethylsiloxane	1.5	0	1.5	1.5
					Isododecane	10.0	10.0	0	10.0
Hydrogenated polyisobutenes	0.2	0.2	0.2	0
					Propylene glycol	1.0	1.0	1.0	1.0
Sodium chloride	0.2	0.2	0.2	0.2
					Sodium benzoate	0.1	0.1	0.1	0.1
Phenoxyethanol	0.2	0.2	0.2	0.2
					Citric acid	0.02	0.02	0.02	0.02
Essence	0.1	0.1	0.1	0.1
					Pigment	0.02	0.02	0.02	0.02
Deionized water	86.66	78.16	86.66	76.86

The following raw material compositions of comparative examples 5 to 10 are shown in Table 4, and the preparation methods of the two-layer hair care oils of comparative examples 5 to 10 were the same as those of example 1.

Comparative example 5

The composition of the starting material of comparative example 5 compared to example 1, no cyclopentadimethylsiloxane and polydimethylsiloxane were added.

Comparative example 6

The feed composition of comparative example 6 compares to example 1 without addition of isododecane and hydrogenated polyisobutene.

Comparative example 7

The starting material composition of comparative example 7 compared to example 1, no polydimethylsiloxane, isododecane and hydrogenated polyisobutene were added.

Comparative example 8

The composition of the feedstock of comparative example 8 compared to example 1, no cyclopentadimethylsiloxane, propylene glycol and sodium chloride were added.

Comparative example 9

The composition of the starting material of comparative example 9 compared to example 1, with no polydimethylsiloxane, propylene glycol and sodium chloride added.

Comparative example 10

The composition of the feedstock of comparative example 10 compared to example 1, with no polydimethylsiloxane, isododecane, propylene glycol, and sodium chloride added.

Comparative example 11

Compared with the composition of the raw material in the example 1, the raw material composition of the comparative example 11 is that squalane is adopted to replace hydrogenated polyisobutene, and the specific raw material composition is as follows: 10 parts of cyclopenta dimethyl silicone polymer, 1.5 parts of polydimethylsiloxane, 10 parts of isododecane, 0.2 part of squalane, 1.0 part of propylene glycol, 0.2 part of sodium chloride, 0.1 part of sodium benzoate, 0.2 part of phenoxyethanol, 0.02 part of citric acid, 0.1 part of essence, 0.02 part of pigment and 88.16 parts of deionized water; the double-layer hair care oil of comparative example 11 was prepared in the same manner as in example 1.

Table 4: raw material composition table of two-layer hair care oils of comparative examples 5 to 10

Raw materials (parts)	Comparative example 5	Comparative example 6	Comparative example 7	Comparative example 8	Comparative example 9	Comparative example 10
							Cyclopenta dimethyl siloxane	0	10.0	10.0	0	10.0	10.0
Polydimethylsiloxane	0	1.5	0	1.5	0	0
							Isododecane	10.0	0	0	10.0	10.0	0
Hydrogenated polyisobutenes	0.2	0	0	0.2	0.2	0.2
							Propylene glycol	1.0	1.0	1.0	0	0	0
Sodium chloride	0.2	0.2	0.2	0	0	0
							Sodium benzoate	0.1	0.1	0.1	0.1	0.1	0.1
Phenoxyethanol	0.2	0.2	0.2	0.2	0.2	0.2
							Citric acid	0.02	0.02	0.02	0.02	0.02	0.02
Essence	0.1	0.1	0.1	0.1	0.1	0.1
							Pigment	0.02	0.02	0.02	0.02	0.02	0.02
Deionized water	88.16	86.86	88.36	87.86	79.36	89.36

Performance testing

1. Appearance contrast

The appearance of the two-layer hair care oils prepared in examples 1 to 9 and comparative examples 1 to 11 was observed and compared with a commercially available two-layer hair care oil a (the oil phase of the two-layer hair care oil a was mainly comprised of coco-caprylate/caprate and propylheptyl caprylate, and the aqueous phase was mainly comprised of water and propylene glycol), and the results are shown in table 5.

Table 5: comparative examples, comparative examples and comparative table of appearance of commercial two-layer hair oil A

The comparison of the appearance of table 5 shows that: comparing examples 1-3 with comparative examples 1-10, and the dual-layer hair conditioner a, it can be seen that when the oil phase raw material, cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane, hydrogenated polyisobutene, lacks any one of them, or lacks a combination of cyclopentadimethylsiloxane and polydimethylsiloxane, or lacks isododecane, hydrogenated polyisobutene, or lacks polydimethylsiloxane, isododecane, and hydrogenated polyisobutene, both the oil phase and the water phase are difficult to separate, the water-oil interface is not clear enough, and there is a wall hanging phenomenon, and the commercial dual-layer hair conditioner a has a clear water-oil interface, but also has a wall hanging phenomenon.

Comparing examples 4-5 with comparative examples 1-10, it can be seen that when one of propylene glycol and sodium chloride is absent in the water phase, the oil phase and the water phase are difficult to separate, the water-oil interface is not clear enough, and the phenomenon of wall hanging exists. Therefore, the double-layer hair care oil has the good effects that the layered interfaces of the oil phase and the water phase are clear and do not hang on the wall, and the effects are influenced as the result of the synergistic effect of the raw materials of the water phase and the oil phase and the lack of one or more raw materials.

Comparing examples 1-3 with examples 6-9, it can be seen that when the amount of sodium chloride added is less than or greater than 0.1-1.5 parts, both the oil phase and the water phase are difficult to separate, the water-oil interface is not clear enough and there is a phenomenon of wall build-up. When the propylene glycol is lower than or higher than 1.0-5.0 parts, the oil phase and the water phase are difficult to separate, the water-oil interface is not clear enough, and the phenomenon of wall hanging exists.

Comparing comparative example 11 with example 1, it is understood that when squalane is used instead of hydrogenated polyisobutene, the delamination effect is poor and wall build-up occurs.

2. Hair comb test

The double-layered hair tonics prepared in examples 1 to 9 and comparative examples 1 to 10 and the commercially available double-layered hair tonic a were subjected to a dynamic combing force test in which after the double-layered hair tonic was applied to the hair, the resistance generated when the hair tresses were combed and the integral thereof (i.e., combing work) were measured, thereby comparing the softening effect of each of the double-layered hair tonics on the hair. To facilitate uniform criteria, the baseline for all products was set to 1.0 and relative data for each sample was calculated based thereon. If the value is less than 1, the sample only needs lower combing work when combing the hair, and the sample has better softening effect than the reference product; on the contrary, if the numerical value is more than 1, the softening effect of the sample is poorer than that of the reference product, the instant softening effect refers to the effect measured after the hair care oil is smeared, and the test result is shown in table 6.

Table 6: comparative combing test tables for each example, comparative example and commercial two-layer hair conditioner

As can be seen from the results of the dynamic hair comb test shown in Table 6, the two-layer hair care oils prepared in examples 1 to 9 have significantly improved softening effects compared to the commercially available two-layer hair care oil A and comparative examples 1 to 10.

Comparing comparative examples 1-10 with example 1, it can be seen that: when the oil phase raw material of cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane and hydrogenated polyisobutene lacks any one of the cyclopentadimethylsiloxane, the polydimethylsiloxane combination, the isododecane and the hydrogenated polyisobutene, or the polydimethylsiloxane, the isododecane and the hydrogenated polyisobutene, or the hydrogenated polyisobutene, the softening effect is reduced.

Comparing the test results of example 2 with those of examples 6-9 shows that: none of examples 6-9 had the same compliant effect as example 2.

3. Microstructural testing

The double-layer hair care oil prepared in the example 1 and the double-layer hair care oil prepared in the comparative example 1 are respectively coated on different parts of a single hair, SEM scanning electron microscopic morphology test is carried out, and the actual repairing effect of the double-layer hair care oil is observed under a scanning electron microscope.

As shown in fig. 1, the surface appearance of the hair after applying the double-layer hair conditioner of comparative example 1 was represented as: the hair scales are not smooth and fit well.

As shown in fig. 2, the surface appearance of the hair after applying the double-layer hair conditioner of example 1 was: the hair scales are arranged flatly and relatively attached, and the hair scale has a good repairing effect.

4. Hair shine test

The method comprises the steps of testing the glossiness of hair bundles by using a skin glossiness testing probe, grouping the hair bundles by using corresponding data, coating a proper amount of hair care oil on the hair bundles, respectively testing the glossiness of the hair before the hair care oil is not coated, the instant glossiness after the hair care oil is used and the glossiness after 1h, and then respectively calculating the instant glossiness after the hair care oil is used and the percentage of the glossiness increase after 1 h.

The hair lightening tests were carried out on the two-layer hair care oils prepared in examples 1 to 9 and comparative examples 1 to 10 and the commercially available two-layer hair care oil A, and the results are shown in Table 7.

Table 7: comparative table for hair shine test of each example, comparative example and commercial two-layer hair care oil

As can be seen from the hair shine test results in Table 7, the two-layer hair care oils prepared in examples 1-9 exhibited significantly improved percent immediate gloss enhancement and 1h gloss enhancement relative to the commercially available two-layer hair care oil A and comparative examples 1-10.

Comparing comparative examples 1-10 with example 1, it can be seen that: the gloss effect is reduced when the oil phase is comprised of cyclopentadimethicone, dimethicone, isododecane, hydrogenated polyisobutene, either alone or in combination, of cyclopentadimethicone, dimethicone, isododecane, hydrogenated polyisobutene, or in combination, dimethicone, isododecane, hydrogenated polyisobutene.

Comparing the test results of example 2 with those of examples 6-9 shows that: the gloss effect of examples 6-9 was not particularly significantly different from that of example 2.

5. Human sensory evaluation

The human body sensory evaluation is to evaluate the softening effect, repairing effect, refreshing degree and double-layer appearance of the double-layer hair care oil through the sensory evaluation after the double-layer hair care oil is used.

The process of human body sensory evaluation is as follows: 120 volunteers were recruited, and after grouping, were randomly grouped into 20 volunteers each group for 1 week with each group of double-layer hair care oil continuously, and the testers scored according to the feeling of use. The scoring criteria used 10 points:

the softening effect is as follows: the softening effect is very low at 1 minute, low at 3 minutes, general at 5 minutes, high at 7 minutes and very high at 10 minutes;

repairing effect: 1 minute-no improvement, 3 minute-low degree of improvement, 5 minute-general degree of improvement, 7 minute-high degree of improvement, 10 minute-very high degree of improvement;

refreshing degree: 1 point-very not fresh, 3 point-low degree of fresh, 5 point-general degree of fresh, 7 point-high degree of fresh, 10 point very high degree of fresh.

The results of the sensory evaluation of human body are shown in table 8.

Table 8: table for comparing sensory evaluation of human body of each example, each comparative example, and each commercially available two-layer hair conditioner

As can be seen from the results of the human sensory evaluation in table 8, the two-layer hair care oils prepared in examples 1 to 3 have greater advantages in appearance and refreshing degree, and also have certain improvements in softening effect and repairing effect, compared to the commercially available two-layer hair care oil a and comparative examples 1 to 10, and are generally preferred by the testers.

Comparing the evaluation results of examples 4 to 5 with those of example 1, it can be seen that: examples 4 to 5 were slightly inferior to example 1 in the softening effect, repairing effect and refreshing property, but the two-layer appearance effect was poor, and the overall evaluation was also not high.

Comparing the evaluation results of examples 6 to 9 with those of example 2, it can be seen that: the softening effect, repairing effect, and refreshing degree of examples 6 to 9 were the same as those of example 2, but the appearance of the double layer was poor, resulting in poor overall evaluation.

Comparing comparative examples 1-10 with example 1, it can be seen that: when the oil phase raw material of cyclopentadimethylsiloxane, polydimethylsiloxane, isododecane and hydrogenated polyisobutene lacks any one of the cyclopentadimethylsiloxane, the polydimethylsiloxane and the hydrogenated polyisobutene, or simultaneously lacks the combination of cyclopentadimethylsiloxane and the polydimethylsiloxane, or simultaneously lacks isododecane and hydrogenated polyisobutene, or simultaneously lacks polydimethylsiloxane, isododecane and hydrogenated polyisobutene, the softening effect, the repairing effect, the freshness and the layered appearance of the oil phase raw material are reduced, and the overall evaluation is not ideal.

In conclusion, the double-layer hair care oil prepared by the invention has clear interface between the upper oil phase and the lower water phase, has obvious layering effect, is beneficial to improving the appearance color value of the double-layer hair care oil, can also enable the lower water phase to be randomly adjusted in the later product preparation process, and enlarges the application range. Meanwhile, the raw materials in the water phase and the oil phase of the double-layer hair care oil are synergistic, so that the prepared double-layer hair care oil has excellent softening effect and repairing effect, good use feeling, high freshness and good overall use effect.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.