JP6280911B2 - Shower cosmetic and cosmetic cartridge - Google Patents

Description

  The present invention relates to a shower cosmetic and a cosmetic cartridge accommodated in a cosmetic cartridge that is detachably incorporated in a shower head.

  In general, a cosmetic cartridge of a shower device provided in a bathroom or a bathroom is filled with cosmetic components such as an oil agent, a moisturizing agent, a fragrance, and a bath agent. These cosmetic components are eluted from the cosmetic cartridge into cold water or warm water and are sprayed from the shower head. Cosmetic ingredients are usually filled in cosmetic cartridges as solids or powders, but are easy to dissolve in cold water or warm water, so they dissolve in cold water or warm water in a short time, and the solid form has no persistence. As a result, the effect is not sustainable. For this reason, the cosmetic ingredient must be frequently supplied to the cosmetic cartridge, which is complicated. Accordingly, there is a need for a cosmetic ingredient that is suppressed in solubility in cold water or warm water and has a solid form of durability.

  This type of solid shower product is disclosed in Patent Document 1. This solid shower product contains 30 to 95% by weight of polyethylene glycol together with one or more components selected from pigments, fragrances, bathing agents, cleaning agents and cosmetics. As the polyethylene glycol, those having an average molecular weight of 1000 to 6000 are preferably used. By using this solid shower product, the dissolution time of the solid shower product in cold water or warm water is long, and the elution of the pigment, the fragrance, the bath agent, the cleaning agent, and the cosmetic product can be made uniform.

Japanese Patent Publication No. 2-7571

  In the solid shower product of the conventional configuration described in the aforementioned Patent Document 1, polyethylene glycol is used as a component that suppresses solubility in water. However, the polyethylene glycol has higher solubility in water than polypropylene glycol and the like. For this reason, when the cosmetic ingredient is filled in the cosmetic cartridge and used, the solubility in water is relatively high, and in particular, the solubility in warm water of 35 ° C. or higher is further enhanced. Therefore, as a solid shower product for a cosmetic cartridge, sustainability of the solid shape was insufficient.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose of the present invention is to provide a shower cosmetic that can secure a certain amount of elution with respect to cold water or hot water, while suppressing excessive solubility and obtaining sufficient sustainability of the solid shape. .

  In order to achieve the above object, the shower cosmetic of the present invention comprises a polyoxyethylene glycol (hereinafter referred to as PEG) / polyoxypropylene glycol (hereinafter referred to as PPG) copolymer as an essential component.

  The shower cosmetic preferably contains polyvinyl alcohol (hereinafter referred to as PVA).

  Furthermore, the cosmetic for shower preferably contains a cosmetic agent.

  The PEG / PPG copolymer, PVA or cosmetic agent is preferably dispersed uniformly and solid at normal temperature.

  The mass ratio of PEG to PPG (PEG / PPG) in the PEG / PPG copolymer is preferably (150 to 200) / (35 to 70).

  The PVA is preferably partially saponified PVA having a saponification degree of 86 to 90 mol%.

  The PVA content is preferably 0.7 to 15% by mass.

Also, cosmetic agent cartridge housed within the shower head of the present invention, the apertures taking the cold water or hot water, and the inner tube communicating with the apertures, and having a decorative ZaiOsamu paid chamber, said cosmetic agent storage chamber and communicating with said inner tube, have a communicating hole which allows out of the cold water or hot water passing through the inner pipe to the cosmetic agent storage chamber, wherein the cosmetic agent storage chamber, any of the above-described Shower cosmetics are stored.

  According to the present invention, it is possible to ensure a certain amount of elution with respect to cold water or hot water, while at the same time achieving an effect of suppressing excessive solubility and obtaining sufficient sustainability.

It is an external view of a shower head, (a) is a front view, (b) is a right side view. It is sectional drawing of a shower head, Comprising: (a) is a longitudinal cross-sectional view of a grip part, (b) is a longitudinal cross-sectional view of the grip part cut | disconnected by the part different from (a). It is a figure explaining the internal structure of the grip part of a shower head, (a) is a top view, (b) is a perspective view. It is a figure explaining the cartridge incorporated in a shower head, Comprising: (a) is a perspective view which shows the external appearance of a cartridge, (b) is sectional drawing of a cartridge. The graph which shows the relationship between the temperature of warm water and the elution density | concentration of the shower cosmetic in warm water about the cosmetics for showers of Example 1 and Comparative Examples 1 and 2.

  Hereinafter, embodiments embodying the present invention will be described in detail.

  The shower cosmetic agent contains a PEG / PPG copolymer as an essential component. This shower cosmetic agent preferably contains PVA, and more preferably contains a cosmetic agent. Further, the shower cosmetic may contain other components.

  Next, each component of the shower cosmetic will be described.

(PEG / PPG copolymer)
The PEG / PPG copolymer has a polyoxyethylene glycol (polyethylene glycol) unit and a polyoxypropylene glycol (polypropylene glycol) unit in the molecule, is a nonionic surfactant, and has a moisturizing effect. As the PEG / PPG copolymer used in the cosmetic for shower, those that are solid at room temperature are suitable.

  The PEG unit constituting the PEG / PPG copolymer functions to increase the solubility of the shower cosmetic in water (cold water or hot water), and the PPG unit suppresses the solubility of the shower cosmetic in water. To function. Therefore, by having both of these PEG units and PPG units, the PEG units and the PPG units act synergistically to suppress the solubility of the cosmetic for shower in cold water and hot water, and to maintain elution sustainability. be able to.

The copolymerization ratio of PEG and PPG in the PEG / PPG copolymer is not particularly limited. Therefore,
Examples of the PEG / PPG copolymer include the following (numbers indicate mass ratio).

  PEG / PPG-3 / 17 copolymer, PEG / PPG-5 / 30 copolymer, PEG / PPG-5 / 35 copolymer, PEG / PPG-8 / 55 copolymer, PEG / PPG-10 / 30 copolymer, PEG / PPG-10 / 65 copolymer, PEG / PPG-12 / 35 copolymer, PEG / PPG-16 / 17 copolymer, PEG / PPG-20 / 9 copolymer, PEG / PPG-20 / 20 copolymer, PEG / PPG-20 / 60 copolymer, PEG / PPG-22 / 25 copolymer, PEG / PPG-25 / 30 copolymer, PEG / PPG-30 / 35 Copolymer, PEG / PPG-35 / 40 copolymer, PEG / PPG-50 / 40 copolymer, PEG / PPG-150 / 35 copolymer, PEG / PPG-160 / 30 copolymer, PEG / PPG-190 / 0 copolymer, PEG / PPG-200/40 copolymer, PEG / PPG-200/70 copolymer, PEG / PPG-240/60 copolymer, PEG / PPG-300/55 copolymer.

  Among the examples of the above-mentioned copolymer, the range is preferably PEG / PPG (mass ratio) = (150 to 200) / (35 to 70). When this copolymerization ratio exceeds 150/35 and the proportion of PEG increases, the solubility of the shower cosmetic in cold water and hot water tends to be too high. On the other hand, when the copolymerization ratio is smaller than 200/70 and the ratio of PEG is decreased, the solubility of the shower cosmetic in cold water and hot water becomes insufficient.

  Incidentally, the freezing point of the copolymer having a PEG / PPG mass ratio of 150/35 is 52 ° C., and the freezing point of the copolymer having a PEG / PPG weight ratio of 200/70 is 55 ° C.

  If the molecular weight (degree of polymerization) of the PEG / PPG copolymer is increased, the elution rate of the shower cosmetic with respect to cold water or hot water can be suppressed and swelling can be suppressed. Since (smoothness) deteriorates, the molecular weight of the PEG / PPG copolymer is appropriately set in consideration of them.

(PVA)
Since PVA has a large number of hydroxyl groups, it has a very strong hydrophilic property and is particularly soluble in hot water. Therefore, by adding PVA to the shower cosmetic, the solubility of the shower cosmetic particularly in warm water of 35 ° C. or higher can be enhanced.

  This PVA is obtained by a saponification reaction of polyvinyl acetate and is represented by the following general formula.

- _[CH 2 -CH (OH)] _m - _[CH 2 -CH (OCOCH _{3)] n}
Here, the polymerization degree of PVA is represented by m + n, and the saponification degree is represented by m / (m + n).

  As PVA used for the cosmetic for shower, partially saponified PVA is preferable from the viewpoint of enhancing the solubility in warm water and suppressing swelling, and the degree of saponification is preferably 86 to 90 mol%, the degree of polymerization. Is preferably 1800-2000. When the degree of saponification is less than 86 mol% or the degree of polymerization is less than 1800, the tendency for the cosmetic for shower to swell against cold water or hot water becomes unfavorable. On the other hand, when the degree of saponification is greater than 90 mol% or the degree of polymerization is greater than 2000, the solubility of the shower cosmetic in cold water or hot water is unfavorable.

(Beauty agent)
Beauty agents include collagen, ceramide, placenta, various vitamins (vitamin C, vitamin E, etc.), natural fragrances, synthetic fragrances, formulated fragrances (fragrances, etc.), oils, moisturizers, fragrances, deodorants, antiperspirants, Examples thereof include pigments, preservatives, emulsifiers, amino acids and water. The kind of beauty agent is not limited, You may use a well-known thing.

  By containing the PEG / PPG copolymer and PVA, the beauty agent can be eluted for a long period of time without being unnecessarily eluted from the cosmetic for shower.

(Other additive components)
As other additive components, viscosity modifiers, excipients and the like are appropriately selected and used.

(Composition of cosmetic for shower)
The PEG / PPG copolymer constituting the shower cosmetic is the main component of the shower cosmetic and is preferably contained in the shower cosmetic in an amount of 80 to 97% by mass. When the content of the PEG / PPG copolymer is less than 80% by mass, it is difficult to obtain appropriate solubility of the cosmetic for shower in cold water or hot water, and it is difficult to obtain moisture retention. On the other hand, when the content of the PEG / PPG copolymer exceeds 97% by mass, the content of PVA and the cosmetic agent is relatively decreased, and an effect based on those components cannot be obtained, which is not preferable.

  Moreover, it is preferable that 0.7-15 mass% is contained in the cosmetics for showers, and it is still more preferable that PVA is contained 3.5-15 mass%. When the content of PVA is less than 0.7% by mass, when the shower cosmetic agent is used, it tends to swell when it comes into contact with cold water or warm water, which is not preferable. On the other hand, when the content of PVA exceeds 15% by mass, the content of the PEG / PPG copolymer and the cosmetic agent becomes relatively small, and the effects of these components are not sufficiently exhibited, which is not preferable. .

  Furthermore, it is preferable that 2-7 mass% of cosmetics is contained in the cosmetic for showers. When the content of the cosmetic agent is less than 2% by mass, effects such as moisturizing property and fragrance as the cosmetic agent cannot be sufficiently exhibited. On the other hand, when the content of the beauty agent is more than 7% by mass, the content of the PEG / PPG copolymer or PVA is relatively small, and the function expression by these components is insufficient, and the cosmetic for shower It is not preferable.

  In addition, when other additive components are blended, the content is desirably 5% by mass or less in the shower cosmetic. When the content of the other additive components exceeds 5% by mass, the content of each component described above is lowered, and the original function of the cosmetic for shower cannot be expressed.

  The shower cosmetic is preferably stored in a cosmetic cartridge and is solid at room temperature for easy management. That is, when the shower cosmetic is not used at the time of washing the body by the shower, it is preferably solid at room temperature in order to maintain its shape. In addition, it is preferable that the PEG / PPG copolymer, PVA, and the cosmetic agent are uniformly dispersed because each component can be eluted evenly when it is eluted at the time of use.

(Cosmetic cartridge and shower head)
Next, a configuration of the shower head 10 in which the cosmetic cartridge (hereinafter simply referred to as a cartridge) 50 of the embodiment and the cartridge 50 are incorporated will be described with reference to FIGS.

  As shown in FIGS. 1A and 1B, the shower head 10 includes a head portion 11 and a grip portion 12. The head unit 11 includes a switching unit 20 that is switched to communicate the water channel 70 in the grip unit 12 with one of the downstream channels 71 and 72 shown in FIGS. Is provided. The flow paths 71 and 72 are merged on the downstream side of the switching unit 20. The switching unit 20 includes a first operation member 45 and a second operation member 48. A large number of water spray holes 16 are formed at the tip of the head portion 11.

  As shown in FIGS. 2A and 2B, the cartridge 50 is accommodated in the water channel 70 of the grip portion 12 in a replaceable manner. A water passage gap 12 c is formed in the water passage 70 between the inner peripheral surface of the grip portion 12 and the outer peripheral surface of the cartridge 50. The head portion 11 and the grip portion 12 are connected via a screwing portion 12d. By releasing the screwing, the upper portion of the water channel 70 is opened, and the cartridge 50 can be attached to and detached from the grip portion 12.

  As shown in FIGS. 3A and 3B, a plurality of raised portions 12 e are formed at the bottom portion on the downstream side of the water channel 70. As shown in FIGS. 2A and 2B, by placing the cartridge 50 on the raised portion 12 e, cold water and hot water are diffused into the water channel 70. A plurality of positioning ribs 12 f that are engaged with the outer peripheral surface of the cartridge 50 and position the cartridge 50 at the center position of the water channel 70 are formed on the inner peripheral surface of the grip portion 12.

  As shown in FIGS. 4A and 4B, the cartridge 50 has a lid member 61. The cartridge 50 includes a cartridge case 51 having a bottomed cylindrical shape. A plurality of slits 51 a are formed in the bottom wall of the cartridge case 51. As shown in FIG. 4B, a cylindrical valve chamber 51b communicating with the slit 51a is formed at the center of the bottom wall of the cartridge case 51. The valve chamber 51b communicates with an inner pipe 53 described later through an opening 51c provided in the upper portion of the valve chamber 51b. The opening 51c corresponds to an inflow port, and the inner pipe 53 corresponds to a water passage.

  As shown in FIGS. 2A and 2B and FIG. 4B, a duckbill valve 52 made of an elastic material such as rubber that functions as a check valve is disposed in the valve chamber 51b. The tip 52b of the duckbill valve 52 is broken into two, and the tip 52b is elastically contacted.

  As shown in FIGS. 2 (a), 2 (b) and 4 (b), a cylindrical inner tube 53 whose lower portion is integrated with the valve chamber 51b is disposed at the axial center portion of the cartridge case 51. Yes. The inner pipe 53 is provided with a large number of communication holes 53c at a predetermined pitch in the circumferential direction and over the entire length in the length direction. The communication hole 53c corresponds to a communication part. A medicine container 54 is defined between the inner tube 53 and the valve chamber 51 b and the cartridge case 51. A cylindrical outlet member 55 is fitted to the downstream end portion of the cartridge case 51, and an end portion of the inner pipe 53 is fitted therein, and the outlet member 55 and the inner pipe 53 are communicated with each other. In the storage space of the medicine storage portion 54, a water-soluble shower cosmetic 100 formed in a solid and substantially cylindrical shape is stored. The storage space of the medicine container 54 corresponds to a storage room, and the medicine container 54 corresponds to a cosmetic agent storage part. A space 101 is formed between the downstream end of the shower cosmetic 100 and the lower end of the outlet member 55 in the initial state where the shower cosmetic 100 is not dissolved. In the present embodiment, for example, a moisturizing agent containing a moisturizing component is used as the shower cosmetic 100. The shower cosmetic 100 is dissolved by cold water or hot water introduced through the communication hole 53c of the inner tube 53 to generate a moisturizing liquid. Then, the moisturizing liquid flows out of the cartridge 50 through the outlet member 55.

  A net-like strainer 57 is disposed between the upper end portion of the inner pipe 53 shown in FIG. 4B and the outlet member 55. The strainer 57 is made of a wire mesh or the like, and a number of fine holes are formed in the strainer 57. The strainer 57 keeps the particles separated from the solid drug 100 and flowing out from the communication hole 53c from flowing out to the head part 11 side. The strainer 57 has an inverted cup shape as a whole, and bulges toward the downstream side of the shower cosmetic 100.

  Next, the operation of the cosmetic cartridge for the shower head and the shower cosmetic configured as described above will be described.

  When using a shower that does not contain the moisturizing liquid, the user pushes in the second operation member 48 as shown in FIG. In this way, although detailed explanation is omitted, the flow channel 71 on the water passage gap 12c side of the water channel 70 is opened, and the flow channel 72 on the inner tube 53 side is closed, so that cold water and hot water are It flows into the flow path 71 of the head part 11 through the water flow gap 12 c through the shower hose and is discharged from the water spray hole 16. In this case, since the flow path 72 on the downstream side of the inner pipe 53 is closed, the duckbill valve 52 is not opened, and water does not flow into the inner pipe 53 of the cartridge 50. Therefore, in this state, even if the duckbill valve 52 is closed by its own elasticity and the water pressure in the inner pipe 53 becomes higher than the water pressure on the upstream side of the duckbill valve 52, the pressure difference is relative to the duckbill valve 52. Acting in the valve closing direction. Therefore, it is possible to prevent the moisturizing liquid in the inner pipe 53 from flowing backward to the shower hose side outside the shower head 10.

  When using a shower containing moisturizing liquid, the user presses the pressing portion 45 a of the first operating member 45. For this reason, although not shown, the flow path 72 is opened. Accordingly, the cold water or hot water not only flows from the water passage gap 12c to the flow path 71 but also opens the flow path 72 on the upstream side of the duckbill valve 52, and therefore, as shown in FIGS. 2 (a) and 2 (b). The duckbill valve 52 is opened and flows into the inner pipe 53 of the cartridge 50. The cold water or hot water that has flowed into the inner tube 53 flows into the medicine container 54 through the communication hole 53 c of the inner tube 53. The cold water or hot water that has flowed into the medicine container 54 dissolves the medicine in the medicine container 54 and becomes a moisturizing liquid. Then, the moisturizing liquid flows out from the communication hole 53 c into the inner pipe 53 and flows into the flow path 72 from the outlet member 55 through the strainer 57.

  The moisturizing liquid in the flow path 72 is mixed with cold water or hot water flowing in the flow path 71 from the water passage gap 12 c on the downstream side of the switching unit 20 to become a diluted moisturizing liquid. Then, the diluted moisturizing liquid is discharged from the sprinkling holes 16. In addition, although the hole is not formed in the wall of the valve chamber 51b, if the volume of the shower cosmetic 100 is reduced by dissolution, cold water and hot water that have entered the medicine container 54 through the communication hole 53c are reduced in volume. A turbulent flow is formed around the later shower cosmetic 100, and the shower cosmetic 100 after the volume reduction is lifted. For this reason, even if a hole is not formed in the wall of the valve chamber 51b, the shower cosmetic 100 is appropriately dissolved and flows out from the communication hole 53c.

  As described above, a normal shower that does not include the moisturizing liquid and a shower that includes the moisturizing liquid can be obtained by the selection operation of the first and second operation members 45 and 48. In this case, the inner diameter of the inner tube 53, the size and number of the openings of the communication hole 53c, the arrangement position, and the like are set so that a moisturizing liquid with an appropriate concentration can be obtained. If it does in this way, the cosmetics 100 for showers will be scraped off little by little by the cold water or warm water which flowed in the chemical | medical agent accommodating part 54, and it will melt | dissolve instantly.

  In addition, a space 101 is formed on the downstream side of the shower cosmetic 100, and an interval is formed between the upper end of the shower cosmetic 100 and the strainer 57. In addition, the strainer 57 bulges downstream. It is formed in a shape. Therefore, a relatively large particle peeled from the shower cosmetic 100 moves so as to fluctuate due to the water flow on the upstream side of the strainer 57. For this reason, it can prevent that such a granular material adheres to the inside of the strainer 57, and a flow path is blocked.

  Since the shower cosmetic 100 contains a PEG / PPG copolymer as an essential component, it can exhibit a certain solubility while suppressing the solubility in cold water or warm water. Moreover, since the shower cosmetic 100 contains PVA, the solubility in warm water is particularly enhanced. Furthermore, the moisturizing agent as a beauty agent can improve the moist feeling of the skin after taking a shower.

  As described above, according to the shower cosmetic 100 of the present embodiment, excessive solubility in cold water or warm water can be suppressed, and at the same time, it is eluted in a stable state over a long period of time with a constant amount of elution. Can do.

(Example of change)
In the above embodiment, a humectant is used as the medicine stored in the cartridge 50. The medicine contained in the cartridge 50 is not limited to this, but is a perfume, a slimming agent, other cosmetic additives such as whitening lotion, antiperspirant, acne, atopy, and a dermatological drug. May be. Moreover, in the said embodiment, although the solid and cylindrical chemical | medical agent was used, the shape and form of a chemical | medical agent are not limited to this. For example, a gel-like or particulate drug may be used.

  In the above embodiment, the duck bill valve 52 is provided in the cartridge 50 so that the water does not flow into the cartridge 50 when only water is sprayed from the shower head 10. The check valve that prevents water from flowing into the cartridge when only water is sprayed may have a configuration other than the duckbill valve 52. Further, when only water is sprayed, if the solution in which the medicine is dissolved in the cartridge 50 does not flow out, the water may flow into the cartridge 50.

  According to this embodiment, the following effects can be obtained.

  (1) The shower cosmetic of the present embodiment is configured to include a PEG / PPG copolymer as an essential component. As a result, the synergistic action of the PEG unit and the PPG unit of the PEG / PPG copolymer can ensure a certain amount of elution with respect to cold water or hot water, while suppressing the excessive solubility and sufficient sustainability of the solid shape. Can be obtained.

  (2) The shower cosmetic was further configured to contain PVA. The solubility of PVA in water varies depending on the temperature, and the solubility in hot water is higher than that in cold water. Therefore, the solubility of the entire cosmetic for shower with respect to cold water or hot water can be adjusted by adjusting the addition amount of PVA. Moreover, the swelling property of the cosmetic for shower can be suppressed by adding PVA.

  (3) The cosmetic composition for shower was further configured to contain a cosmetic agent. Therefore, effects such as moisturizing property, deodorizing property, antiperspirant property, antiseptic property and the like based on the beauty agent can be exhibited while maintaining appropriate solubility of the cosmetic for shower in cold water or hot water.

  (4) In the shower cosmetic of this embodiment, the PEG / PPG copolymer, the PVA, and the beauty agent were uniformly dispersed and solidified at room temperature. As a result, these components can be uniformly eluted during use.

  (5) The mass ratio of PEG and PPG in the PEG / PPG copolymer is (150 to 200) / (35 to 70). In this case, it is possible to improve the sustainability by suppressing the solubility of the cosmetic for shower in water and warm water.

  (6) The PVA is a partially saponified PVA having a saponification degree of 86 to 90 mol%. As a result, by adjusting the amount of the partially saponified PVA, the solubility of the entire shower cosmetic with respect to cold water or hot water can be more easily adjusted. Moreover, the swelling property of the cosmetic for shower can be suppressed by adding partially saponified PVA.

  (7) Content of the said PVA is 0.7-15 mass%. As a result, it is possible to reduce the possibility that the shower cosmetic agent swells when touched with cold water or hot water when the shower cosmetic agent is used. A more preferable content of PVA is 1 to 13% by weight with reference to Example 11 and Examples 14 and 15. A more preferred content of PVA is 3.5-7% by weight with reference to Examples 2, 9 and 10.

  (8) The cosmetic cartridge of this embodiment includes an opening 51c (inlet) for taking in cold water or hot water, an inner pipe 53 (water passage) communicating with the opening 51c, and a storage space (accommodating room) for storing the cosmetic. And a communication hole 53c (communication portion) through which the storage space and the inner pipe 53 (water passage) communicate with each other and cold water or hot water passing through the inner pipe 53 (water passage) can enter and exit the storage space. A medicine container 54 (drug container) is provided, and the shower cosmetic 100 is housed in the medicine container 54.

  As a result, according to this embodiment, the above-described shower cosmetic that can secure a certain amount of elution with respect to cold water or warm water and suppress excessive solubility and obtain sufficient sustainability of the solid shape is preferable. Can be used for

  Next, the embodiment will be described more specifically with reference to examples and comparative examples.

(Example 1 and Comparative Examples 1 and 2)
In Example 1, the components classified by the following a to d were mixed by the following production method to prepare a shower cosmetic.

(A)
92.15% by mass of PEG / PPG-150 / 35 copolymer
(B1) The following three components total 1.7% by mass
1,2-octanediol (humectant), ethylhexyl glycerin (deodorant, antiperspirant), methyl paraoxybenzoate (preservative)
(B2) The following three components total 1.5% by mass
Amino acids, collagen, water (c)
3.65% by mass of PVA
(D)
Fragrance 1.0% by mass
(Production method)
A method for producing a shower cosmetic will be described.

  The materials of the above sections a, b1, and b2 are put into a vacuum emulsification kettle, heated to 80 ° C. in a vacuum state while stirring with a paddle, and uniformly dissolved. Although the heating temperature is 80 ° C. in this embodiment, it may be any temperature suitable for dissolution.

  Next, the material of section c is put into the kettle, and while stirring with a paddle, it is heated to 80 ° C. in a vacuum state and kneaded until uniform. The heating temperature is 80 ° C. in this embodiment, but may be any temperature suitable for uniform dispersion.

  Next, while stirring with a paddle, cooling is started in a vacuum state, and when the temperature falls to a predetermined temperature (for example, about 65 ° C.), the material of the section d is added, and while stirring with the paddle, cooling is continued. When the take-out temperature is lower than the predetermined temperature, it is taken out and molded into a predetermined shape to obtain a shower cosmetic. This shower cosmetic is solid at room temperature (for example, 25 ° C.). The take-out temperature is not limited as long as it is easy to take out from the pot (in this embodiment, 65 ° C.).

  The shape of the shower cosmetic is not limited as long as it is a shape that can be stored in a cartridge loaded with the shower cosmetic. For example, as the shape of the shower cosmetic that can be stored in the cartridge, an appropriate shape such as powder, granular shape, columnar shape, or cylindrical shape can be selected.

  On the other hand, in the comparative example 1, it replaces with the PEG / PPG-150 / 35 copolymer in the said Example 1, and has a unit (block) substantially the same as the PEG unit of a PEG / PPG-150 / 35 copolymer. PEG homopolymer was used.

  In Comparative Example 2, PPG having substantially the same unit (block) as the PPG unit of PEG / PPG-150 / 35 copolymer in place of PEG / PPG-150 / 35 copolymer in Example 1. A homopolymer was used.

  In addition, in order to maintain the same conditions, the shape of the cosmetic agent in an Example and a comparative example was each cylindrical.

(Test method)
The shower cosmetic of Example 1 and Comparative Examples 1 and 2 is filled in the cartridge 50 described above, and hot water of 35 ° C., 40 ° C. and 45 ° C. is supplied from the shower head at a flow rate of 9 L / min as follows. Sprinkled with water. That is, in one test cycle, warm water is passed for 1 minute, allowed to stand at room temperature for 1 hour, then warm water is passed for 15 minutes, dried at 40 ° C. for 8 hours, the mass of the cartridge 50 is measured, and the cartridge 50 is measured. The weight loss (g) of the cosmetic agent was measured, and the elution concentration (ppm) was determined. The results are shown in Table 1 and FIG.

  In FIG. 5, ◇ indicates Example 1, □ indicates Comparative Example 1 and Δ indicates Comparative Example 2.

  As shown in Table 1 and FIG. 5, in Example 1, the elution concentration of the shower cosmetic was able to be suppressed to a low concentration of 13.4 to 36.9 ppm regardless of the temperature of the hot water. On the other hand, in the case of PEG of Comparative Example 1, the elution concentration was as high as 41.3 ppm when the temperature of the hot water was 35 ° C., and the elution concentration increased to 89.2 ppm when the temperature was 45 ° C. In the case of the PPG of Comparative Example 2, the elution concentration was 22.9 ppm when the temperature of hot water was 35 ° C., but the elution concentration rapidly increased to 80.3 ppm when the temperature was 40 ° C. When the temperature was 45 ° C., the elution concentration reached 112.3 ppm.

  Next, for the shower cosmetics of Example 1 and Comparative Examples 1 and 2, the body sensation (smoothness) during use of the shower, the moisturizing feeling after drying, and the persistence of the solid shape were measured, and the results are shown. It was shown in 2.

  As shown in Table 2, in Example 1, there was no swelling due to water with respect to any of the bodily sensation during shower use, the moisturizing feeling after drying, and the solid shape sustainability, and good results were obtained. On the other hand, in the case of PEG of Comparative Example 1, although the solid shape can be maintained, the elution concentration with respect to warm water cannot be adjusted, the slimy feeling during shower use is not obtained, and the moisturizing feeling after drying is weak. In addition, in the case of PPG of Comparative Example 2, a slimy feeling during shower use was obtained, but the solid shape could not be maintained, and a moisturizing feeling after drying was not obtained.

(About swelling)
(Examples 2 to 5)
Next, Examples 2 to 5 will be described.

  The components of the shower cosmetics of Examples 2 to 5 were as follows.

(Example 2)
(A)
PEG / PPG-150 / 35 copolymer 91.8% by mass
(B1) The following three components total 1.7% by mass
1,2-octanediol, ethylhexylglycerin,
Methyl paraoxybenzoate (b2) The following three components total 2.0% by mass
Amino acids, collagen, water (c)
PVA 3.5% by mass
(D)
Fragrance 1.0% by mass
(Example 3)
(A)
PEG / PPG-150 / 35 copolymer 92.8% by mass
(B1) The following three components total 1.7% by mass
1,2-octanediol, ethylhexylglycerin,
Methyl paraoxybenzoate (b2) The following three components total 2.0% by mass
Amino acids, collagen, water (c)
PVA 2.5% by mass
(D)
Fragrance 1.0% by mass
Example 4
(A)
PEG / PPG-150 / 35 copolymer 93.8% by mass
(B1) The following three components total 1.7% by mass
1,2-octanediol, ethylhexylglycerin,
Methyl paraoxybenzoate (b2) The following three components total 2.0% by mass
Amino acids, collagen, water (c)
PVA 1.5 mass%
(D)
Fragrance 1.0% by mass
(Example 5)
(A)
PEG / PPG-150 / 35 copolymer 94.8% by mass
(B1) The following three components total 1.7% by mass
1,2-octanediol, ethylhexylglycerin,
Methyl paraoxybenzoate (b2) The following three components total 2.0% by mass
Amino acids, collagen, water (c)
PVA 0.5 mass%
(D)
Fragrance 1.0% by mass
The shower cosmetics of Examples 2 to 5 were prepared by the same production method as in Example 1. In these Examples 2 to 5, as in Example 1, the test was performed by the test method, and the swelling state in the cartridge 50 was confirmed.

  In Example 2 described above, there was no swelling due to water in any of the bodily sensation during shower use, the moisturizing feeling after drying, and the solid shape sustainability, and good results were obtained as in Example 1.

  In Examples 3 to 5, some swelling was observed as compared to Examples 1 and 2, but the swelling was lighter than those in Comparative Examples 1 and 2.

(Examples 6 to 8)
In Examples 6 to 8, shower cosmetics were prepared using only a PEG / PPG copolymer.

  That is, Example 6 uses only PEG / PPG-150 / 35 copolymer, Example 7 uses only PEG / PPG-200 / 70 copolymer, and Example 8 uses PEG / PPG-150 / 35 copolymer. A shower cosmetic was prepared using only a mixture of 50% by mass of a polymer and 50% by mass of a PEG / PPG-200 / 70 copolymer.

  About the obtained shower cosmetics, the elution density | concentration (ppm) was calculated | required from the reduction | decrease (g) of the shower cosmetics in the cartridge 50 like Example 1, and the result was shown in Table 3.

  As shown in Table 3, in Example 6, although the elution concentration of the cosmetic was slightly high at 45 ° C, it could be suppressed to a low concentration of 27.0-27.6 ppm at 35 ° C and 40 ° C. In Example 7, the elution concentration of the cosmetic agent could be suppressed to a low concentration of 5.6 to 10.7 ppm regardless of the temperature. In Example 8, the elution concentration of the cosmetic agent could be suppressed to a sufficiently low concentration of 13.1 to 23.0 ppm regardless of the temperature.

  Moreover, regarding the cosmetics for showers of Examples 6 to 8, the body sensation (smoothness) during use of the shower, the moisturizing feeling after drying, and the solid shape sustainability were measured in the same manner as in Example 1. As a result, the experience during use was almost the same as in Example 1.

(Examples 9 to 13)
In Examples 9 to 13, a cosmetic for shower was prepared using a PEG / PPG copolymer and PVA and changing the PVA content.

  That is, Example 9 uses 93% by mass of PEG / PPG-150 / 35 copolymer and 7% by mass of PVA, and Example 10 uses 96.5% by mass of PEG / PPG-150 / 35 copolymer and PVA 3.5. In Example 11, 99% by mass of PEG / PPG-150 / 35 copolymer and 1% by mass of PVA were used, and in Example 12, PEG / PPG-150 / 35 copolymer was 99.5% by mass. In Example 13, a cosmetic for shower was prepared using 84% by mass of PEG / PPG-150 / 35 copolymer and 16% by mass of PVA.

  About the obtained shower cosmetics, the elution concentration (ppm) was calculated | required from the weight loss (g) of the shower cosmetics in the cartridge 50 like Example 1, and the result was shown in Table 4.

  As shown in Table 4, in Examples 9 to 11 and Example 13, the elution concentration of the cosmetic agent was 6.1 to 43.3 ppm, and only the PEG / PPG-150 / 35 copolymer was used. Compared to Example 6, the concentration could be suppressed to a low level. In Example 12, the elution concentration of the cosmetic agent was 22.1 to 51 ppm, and could not be suppressed to a sufficiently low concentration as compared with Example 6.

  Moreover, regarding the cosmetics for showers of Examples 9 to 13, the body feeling (smoothness) during use of the shower, the moisturizing feeling after drying, and the solid shape persistence were measured in the same manner as in Example 1. As a result, in Examples 9 to 11, the experience during use was almost the same as that in Example 6. In Example 12, the moisturizing feeling after use and the solid shape sustainability were improved as compared to Example 6, and in Example 13, the solid shape sustainability was improved as compared to Example 6.

  Accordingly, the PVA blended in the shower cosmetic can enhance the solubility of the shower cosmetic in water, in particular, the solubility in hot water, and the PVA content is preferably 0.7 to 15 mass. %.

(Examples 14 and 15)
In Examples 14 and 15, a shower cosmetic was prepared using a PEG / PPG copolymer, PVA, and a cosmetic agent.

  That is, in Example 14, a shower cosmetic was prepared using 86% by mass of a PEG / PPG-150 / 35 copolymer, 13% by mass of PVA, and 1% by mass of a cosmetic agent. In Example 15, a shower cosmetic was prepared using 86% by mass of a PEG / PPG-200 / 70 copolymer, 13% by mass of PVA, and 1% by mass of a cosmetic agent. As a cosmetic agent, a mixture of propanediol (wetting agent), capryl glycol (preservative), ethylhexyl glycerin (deodorant, antiperspirant), and methyl parahydroxybenzoate (preservative) was used.

  About the obtained shower cosmetics, the elution density | concentration (ppm) was calculated | required from the reduction | decrease (g) of the shower cosmetics in the cartridge 50 like Example 1, and the result was shown in Table 5.

  As shown in Table 5, in Example 14, the elution concentration of the cosmetic agent was 10.2 to 25.6 ppm, compared with Example 6 using only the PEG / PPG-150 / 35 copolymer. The concentration was sufficiently low. In Example 15, the elution concentration of the cosmetic agent was 3.1 to 10.3 ppm, and could be suppressed to a lower concentration than Example 7 using only the PEG / PPG-200 / 70 copolymer. .

  Moreover, regarding the shower cosmetics of Examples 14 and 15, the body feeling (smooth feeling) during use of the shower, the moisturizing feeling after drying, and the solid shape sustainability were measured in the same manner as in Example 1. As a result, in Examples 14 and 15, the bodily sensation during use and the moisturizing feeling after use were the same as those in Examples 6 and 7, respectively, but both have slightly higher swellability and lower solid shape sustainability. did.

  DESCRIPTION OF SYMBOLS 10 ... Shower head, 11 ... Head part, 12 ... Grip part, 51 ... Cartridge case, 51c ... Opening (inlet), 52 ... Duck bill valve, 53 ... Inner pipe (water passage), 53c ... Communication hole (communication part) 54... Medicine container (cosmetic agent container), 100. Shower cosmetic.

Claims (11)

Polyoxyethylene glycol (hereinafter PEG hereinafter) / polyoxypropylene glycol (hereinafter, referred to as PPG) seen contains as an essential component a copolymer, polyvinyl alcohol (hereinafter referred to as PVA) to contain 0.7 to 15 wt% Shower Cosmetics. The shower cosmetic according to claim 1 , comprising a cosmetic agent. The cosmetic for shower according to claim 2 , wherein the PEG / PPG copolymer, PVA, or cosmetic agent is uniformly dispersed and is solid at room temperature. The shower cosmetic according to any one of claims 1 to 3 , wherein a mass ratio of PEG and PPG in the PEG / PPG copolymer is (150 to 200) / (35 to 70). The PVA is showers cosmetic agent according to any one of claims 1 to 4 is a saponification degree of 86 to 90 mol% of partially saponified PVA. A cosmetic cartridge housed in a showerhead,
The cosmetic cartridge has an opening for taking in cold water or hot water,
An inner pipe communicating with the opening ;
And has a decorative ZaiOsamu paid chamber, possess the cosmetic agent storage chamber cold water or warm water is the cosmetic agent out possible passage of the housing chamber through the inner tube communicating with said inner tube,
A cosmetic cartridge in which the cosmetic for shower according to any one of claims 1 to 5 is stored in the cosmetic storage chamber . The cosmetic cartridge according to claim 6 ,
A tubular cartridge case, with and an inner tube which is formed through the axial center position of the cartridge case, a cosmetic ZaiOsamu accommodated chamber is provided between the inner tube and the cartridge case, the tube wall of the inner tube A cosmetic cartridge in which a plurality of communication holes are transparently provided and a strainer is provided at the downstream end of the inner tube. The communication hole arranged over the entire length in the axial direction of the inner tube, wherein with makeup on ZaiOsamu paid chamber to retract and cosmetic agents for the shower, downstream of the shower cosmetic agent in the cosmetic ZaiOsamu pay room The cosmetic cartridge according to claim 7 , wherein a space is formed in the cosmetic cartridge. The cosmetic cartridge according to claim 7 or 8 , wherein the strainer bulges toward the downstream side. The upstream end of the cartridge case, a valve chamber communicating with the interior of the downstream end of the inner tube is provided, one of claims 7 to 9 in which a check valve in the valve chamber one The cosmetic cartridge according to Item. The decorative ZaiOsamu with placing upstream end of the paid chamber, cosmetic agent cartridge according to claim 10 which closes the periphery of the check valve by the peripheral wall of the valve chamber between the valve chamber and the cartridge case.

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