JPH0237324B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides oil-based hair styling cosmetics (e.g. pomades,
(hair cream, etc.). More specifically, the present invention relates to an oil-based hair styling cosmetic that has low temperature dependence of hardness, is easy to remove and spread during use, has a soft, light, and mild feel, and is stable even after long-term storage. Traditionally, pomades are cosmetics whose hardness is highly dependent on temperature, and in winter they become hard and flaky.
It tends to have poor elongation, and its hardness decreases significantly in the summer, making it less usable. Therefore, there is a demand for products that can be used in all seasons, and various improvement methods have been proposed, but it is difficult to design an actual formulation (same formulation year after year) and to implement it industrially, and there are other drawbacks (such as stability and Many problems remain, including a decline in transparency. As a result of intensive research in view of the current situation, the present inventors have found that when an inert gas is actively introduced into a system of a homogeneous mixture of oily substances such as wood wax and castor oil for uniform dispersion, the entire system produces a cream-like composition (oil-based hair styling cosmetic with a cream-like appearance) that forms an emulsion phase, and this product is stable even during long-term storage, has low hardness, and has low temperature dependence. The present invention was completed based on the discovery that it is not only smaller but also has better release, elongation, feel, etc. during use. The present invention has relatively low hardness, low temperature dependence, and is easy to remove and stretch during use.
To provide a cream (milky white) oil-based hair styling cosmetic that gives a soft and mild touch (feeling) and has excellent storage stability and applicability. That is, the main constituent components of the present invention are essentially wood wax, castor oil, hydrogenated castor oil, a surfactant, and an inert gas, and the inert gas is uniformly distributed throughout the system of the homogeneous mixture of the oily substances. This oil-based hair styling cosmetic is characterized by the fact that the entire system forms a milky white cream. The cosmetics of the present invention can be produced by melt-mixing an oily substance consisting essentially of wood wax and castor oil, storing this oily substance mixture at 40 to 70°C, and stirring it vigorously to remove an inert gas in the atmosphere. into an oil mixture and/or by blowing pressurized inert gas into the oil mixture to homogeneously disperse it, followed by cooling. Can be done. Hereinafter, embodiments of the present invention will be explained in detail. The oil-based hair styling cosmetics (e.g., pomades, hair creams, etc.) of the present invention have a milky-white cream appearance similar to skin creams in skin cosmetics, and contain wood wax, castor oil (or even hydrogenated castor oil). ) The appearance is also markedly different from the conventional (ordinary) pomade (which is transparent and does not contain air bubbles). Furthermore, the milky cream-like appearance of the hair styling cosmetic of the present invention is due to the uniform dispersion of an inert gas into the oily substance mixture consisting of wood wax and castor oil (or even hydrogenated castor oil), as described above. It's not an emulsion like a skin cream. It is non-aqueous (oil-based) and does not contain water and an emulsifier. Therefore, such an oil-based hair styling cosmetic of the present invention may be referred to as, for example, a non-aqueous cream pomade or a non-aqueous hair cream. Examples of the inert gas that is uniformly dispersed in the system of the oily substance mixture of the present invention and forms an emulsion-colored cream include air, nitrogen gas, carbon dioxide gas, etc. The amount is 5 to 30% by volume, preferably 7 to 25% by volume based on the volume of the cosmetic (total amount of prescription ingredients). 5% solubility
When the amount decreases, the non-foaming gas bubbles become larger and form a milky white cream, which not only becomes the usual transparent to translucent pomer-like state, but also becomes extremely hard at low temperatures and soft at high temperatures. The temperature dependence of the so-called hardness increases, giving an undesirable feeling similar to that of ordinary pomades. When the amount exceeds 30% by volume, the stability against temperature decreases, and the hardness and viscosity decrease over time, making it easy to become fluid. The oily substance mixture in the present invention essentially consists of wood wax and castor oil, or wood wax, castor oil, and hydrogenated castor oil. as needed,
Other oily substances having good compatibility with the oily substance may be blended in a small amount within a range that does not deteriorate the properties. The content of wood wax is 5 to 15% by weight, preferably 7 to 13% by weight based on the weight of the cosmetic. The content of castor oil is 50 to 95% by weight, preferably 55 to 92% by weight, based on the weight of the cosmetic. The content of hydrogenated castor oil is 1 to 4% by weight based on the weight of the cosmetic. Examples of other components include antioxidants (content usually 0.01 to 0.5% by weight), fragrances (appropriate amounts), colorants, and the like. The oil-based hair styling product of the present invention can sufficiently achieve the above-mentioned purpose with the above-mentioned components, but it also contains an appropriate amount of a surfactant that is compatible with the above-mentioned oily substance in the coexistence of an inert gas. (0.5 to 9% by weight), the inert gas has good uniform dispersibility and stability, and is easy to wash when washing hair. In this case as well, there is no sweating phenomenon that occurs easily with conventional pomades, and this drawback has also been improved. Examples of surfactants include sorbitan monofatty acid ester, polyoxyethylene sorbitan monofatty acid ester, higher fatty acid dialkanolamide, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl phenyl ether, polyoxyethylene Examples include nonionic surfactants such as hydrogenated castor oil higher fatty acid monoester, polyoxyethylene-polyoxypropylene-higher alkyl ether, polyoxyethylene monohigher fatty acid ester, and cationic surfactants such as distearyldimethylammonium chloride. be able to. The hardness of the milky white creamy hair styling cosmetic of the present invention is considerably lower than that of conventional pomades containing wood wax, castor oil (or even hydrogenated castor oil), and is measured using a card tension meter, for example. Hardness at 25℃ is usually 10~
50, preferably 17-45. Furthermore, the temperature dependence of hardness is much smaller and softer than the conventional pomades, and the viscoelastic properties are also slightly different from conventional (ordinary) pomades of the same hardness. Therefore, it is soft even in winter and can be applied in the same way throughout all seasons, but it also has disadvantages of conventional pomades such as becoming hard during long-term storage, being difficult to release when used, being stretchy, and giving a slightly sticky feeling. There is no, it has been improved.
In addition, it has better long-term stability and applicability, and when used, it comes off easily, spreads easily, and gives a soft and mild feeling.
The effect of using an inert gas uniformly dispersed in an oily substance system is unique and useful. According to the present invention, an oil-based hair styling cosmetic having the excellent features described above can be produced by the method described above. Melt mixing of an oily substance in the method of the invention,
Introducing or blowing inert gas and subsequent cooling are usually carried out using a mixer or homogenizer with strong stirring power, which is equipped with a powerful stirrer, an inert gas introduction pipe, a heating device, a cooling device, etc. It is carried out with During production, first the required amount of wood wax, an oily substance such as castor oil (or even hydrogenated castor oil), and other conventional additive ingredients are added to the tank of the device, stirred and mixed, and then heated and melted. . This melting temperature is usually 75-85°C. The mixed and melted oily substance mixture is cooled, the temperature is maintained at 40 to 70°C (preferably 45 to 65°C), and the inert gas in the atmosphere is removed from the oily substance mixture by vigorous stirring. and/or by blowing an inert gas into the oil mixture. Introducing an inert gas into the atmosphere by vigorously stirring the oily substance mixture (40
~70°C) and high-speed stirring, usually at least 2000 times/min, so that the internal space of the mixer tank is constantly filled with an atmosphere consisting of an inert gas. During such strong stirring, the inert gas forming the atmosphere is (naturally) introduced and dispersed in the oily substance mixture. In addition, the blowing of pressurized inert gas (usually 2 to 5 kg/cm ² ) is carried out using a blowing device commonly used for aeration in normal wastewater treatment, so that the inert gas is uniformly dispersed. This method is preferable because it proceeds more quickly than the introduction method. Most preferably,
This is a method (a combination of the above two methods) in which pressurized inert gas is blown into the system while vigorously stirring the oily substance mixture in an inert gas atmosphere. The introduction or blowing of an inert gas (air, nitrogen gas, carbon dioxide gas or a combination thereof) is carried out until the inert gas content is 5 to 30% by volume (preferably 7 to 25% by volume) based on the volume of the final composition (product). %). As the inert gas is uniformly dispersed into the oily substance mixture system, the entire system changes from transparent or translucent to milky white cream-like. After the inert gas content has reached the required amount, it is either cooled to about 15-30°C in the tank of the mixer or pumped into another cooler (e.g. an aurator). After cooling to approximately 15 to 30°C, the product is filled into appropriate containers. Further, if necessary, an inert gas may be further brought into contact with the mixture while flowing through the cooler for uniform dispersion. Examples will be described below. In the examples, % means % by volume, and parts means parts by weight. The hardness shown in Examples is the result of measurement using a card tension meter. In addition, the quality characteristics of sample cosmetics and the results of practical tests are the results of five specialized inspectors. Also,
The results of the spring test were based on 30 male participants. Example 1 10 parts of wood wax, 74 parts of castor oil, and an antioxidant (BHT) are placed in a mixer equipped with a powerful stirrer, an inert gas inlet and blowing device, a heating device, a cooling device, etc. 0.1 part was added and heated to 85°C to uniformly mix and melt while stirring. Melt this mixture at 45 °C.
After cooling the mixture to a temperature ^of The mixture was blown for 1 hour to uniformly disperse the oily substance mixture in the system. Thereafter, the product was cooled to 25°C and taken out. The obtained oil-based hair styling cosmetic was in the form of a milky white cream, and its air content was 16.1%. And the hardness is 5℃
35, 25 at 25℃, and 12 at 45℃, confirming that the temperature dependence of hardness is small. This cream-like hair conditioner is stable even in a severe test where it is left at 45℃ for 2 months, and the hardness of the sample is 35 at 5℃, 24 and 45 at 25℃.
It was 12°C. In addition, both the sample immediately after production and the sample left at 45° C. for two months were soft, had good release and spreadability during use, gave a soft and mild feel, and had good hair styling ability. Furthermore, the results of a panel test (2 months) of 30 men showed that 25 out of 30 answered that they were soft.
24 people answered that it comes off easily when using it.
30 people answered that it was easy to grow, 25/30 people said it felt good, 23/30 people said it had good hair styling ability. Comparative Example 1 10 parts of wood wax, 74 parts of castor oil, and 0.1 part of antioxidant (BHT) were mixed and melted (melted at 85°C) under the same conditions as in Example 1 (invention), and then placed in a container.
A conventional pomade was obtained by quenching in a freezer.
Next, this pomade was left at 45°C for 2 months. The hardness of this pomade was 80 at 5°C, 47 at 25°C, and 9 at 45°C, and it was found that the hardness was extremely temperature dependent. Further, a panel test of this pomade was conducted in the same manner as in Example 1. As a result, those who answered that it was hard
27 out of 30 people, 10 out of 30 people answered that it comes off easily when using it, and 14 people answered that it stretches easily.
8/30 people said it felt good, and 27/30 people said it had good hair styling ability. Example 2 The same procedure as Example 1 was carried out except that nitrogen gas was used instead of air. The resulting hair styling product was in the form of a milky white cream, and its nitrogen gas content was 15.7%. And the hardness is 36 at 5℃,
It was 27 at 25°C and 12 at 45°C, and it was recognized that the temperature dependence was small. This cream-like hair conditioner was also stable in a severe test of being left at 45°C for 2 months. After the test, it remained soft, had good release and spreadability during use, gave a soft and mild feel, and had good hair styling ability. Example 3 The same procedure as Example 1 was carried out except that carbon dioxide gas was used instead of air. The resulting hair styling product was in the form of a milky white cream, and its carbon dioxide content was 14.7%. And the hardness is 35, 25 at 5℃
℃, 26, and 45℃, 10, and the temperature dependence was recognized to be small. This cream-like hair conditioner was also stable in a severe test of being left at 45°C for 2 months. After the test, it remained soft, had good release and spreadability during use, gave a soft and mild feel, and had good hair styling ability. Example 4 Furthermore, 1 part of hydrogenated castor oil was added to the wood wax of Example 1.
Besides mixing and melting 10 parts with 74 parts of castor oil,
The same procedure as in Example 1 was carried out. The obtained oil-based hair styling product was in the form of a milky white cream and had an air content of 17.2%. And the hardness is 28 at 5℃,
It was confirmed that the temperature dependence of hardness was 23 at 25°C and 16 at 45°C. This creamy hair conditioner was stable in a severe test of being left at 45°C for two months, and also stable in a test of being stored at room temperature for one year. The hardness of the sample after the above severe test was 5℃
It was 27 at temperature, 22 at 25℃, and 16 at 45℃. In addition, both the sample immediately after production and the sample left at 45°C for two months were soft, had good removal and spread during use, gave a soft and mild feel, and had good hair styling ability. Furthermore, the results of a panel test (2 months) of 30 men showed that 27 out of 30 answered that it was soft, and 28 out of 30 answered that it was easy to remove when using it, making it easy to improve. Those who answered
27/30 people, 26/30 people said it felt good
27 out of 30 people answered that their hair styling ability was good. Example 5 The same procedure as in Example 1 was conducted except that 4 parts of each of the following surfactants were mixed and melted together with 10 parts of the wood wax of Example 1 and 74 parts of castor oil. Each of the obtained oil-based hair styling products formed a milky white cream, and Table 1 shows the air content, hardness, stability after 2 months at 45°C, and the results of practical tests. Surfactant No.1 Polyoxyethylene castor oil (40E.O) No.2 Hardened castor oil (50E.O.
O) No.3 Benzalkonium chloride No.4 Sorbitan monostearate No.5 Coconut fatty acid diethanolamide No.6 Polyoxyethylene sorbitan monostearate (20E.O)

【table】

[Table] Example 6 In Example 1, without cooling after blowing pressurized air into the system of the oily substance mixture,
The mixture was cooled to 25° C. by sending it through a cooling cylinder (onlator) using a pump and then taken out. In this case, 5Kg/
cm ² of pressurized air was continuously blown for an additional hour to uniformly disperse the mixture in the milky white cream. The air content of the resulting milky white creamy hair styling product (at 25°C) was 25%. Also, the hardness at 5℃ is 23 and 25
The hardness at 45°C was 20 and 17 at 45°C, confirming that the temperature dependence was extremely small. This creamy hair conditioner was stable even in a severe test in which it was left at 45°C for two months. The hardness of the sample after the said severe test was 22 at 5℃, 19 at 25℃, and 45
It was 16°C. In addition, both the sample after being left at 45°C for two months and the sample immediately after production were soft, had extremely good removal and spread during use, gave a soft and mild feel, and had good hair styling ability. Furthermore, the results of a panel test (2 months) of 30 men showed that 28/30 said it was soft, 29/30 said it was easy to stretch, and 29/30 said it felt good. 27 out of 30 people answered that their hair styling ability was good.

Claims (1)

[Claims] 1 The main components are essentially wood wax (5-15% by weight), castor oil (50-90% by weight), hydrogenated castor oil (1-4% by weight), and surfactant (0.5-9% by weight)
and one or more (5 to 30% by volume) of the inert gas group consisting of air, nitrogen gas, and carbon dioxide gas, and the inert gas is uniform in the system of the homogeneous mixture of the oily substance. An oil-based hair styling cosmetic, which has a milky-white creamy system as a whole, and has a hardness of 10 to 50 at 25°C as measured with a card tension meter.