JPH0627057B2 - Flowable composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention comprises a filling section filled with contents and an outlet section having a narrow flow path for obstructing the flow, thereby obstructing the flow. The narrow channel is formed by pores, slits or nozzles having a cross-sectional area that is 1/30 or less of the cross-sectional area of the filling portion, or a mesh of cloth or mesh of 5 to 300 mesh, and the contents are filled as described above. The present invention relates to an active composition to be filled in the filling portion of a pump container or an aerosol container, which is re-kneaded in the flow passage when flowing out from the outlet through the flow passage to the outside through the flow passage.

2. Description of the Related Art Recently, pump type containers and aerosol type containers have attracted attention as containers for toothpaste compositions, but toothpaste compositions have an increased viscosity of the composition at low temperatures (eg, -5 ° C). As a result, the hardness of the extruded product at low temperature increases, making it difficult to extrude. In particular, when a toothpaste composition is filled in a container having a narrow flow passage such as a pump type or aerosol type container, such an increase in extrusion hardness significantly impairs usability. Further, according to the studies by the present inventors, a toothpaste composition filled in such a container is subjected to a shearing action when extruded through a narrow channel thereof, which reduces the shape retention of the composition. It was hot.

For this reason, the present inventors filled a fluid composition such as a toothpaste composition into a container having a narrow flow passage such as a pump type or an aerosol type, and when it is used by extrusion, the extrusion hardness is low even at a low temperature. As a result of diligent research on a fluid composition that does not increase and has good low-temperature extrudability and good shape-retaining property, when a crosslinkable polyacrylic acid or a salt thereof is used as a binder, Have been found to be well achieved.

That is, crosslinked polyacrylic acid and its salts have been conventionally known as a binder for toothpaste compositions, but toothpaste compositions containing crosslinked polyacrylic acid and its salts have liquid separation during long-term storage. There was a problem of causing it, and it was hardly used in actual products. However, when a crosslinked polyacrylic acid or a salt thereof is used as a binder for a toothpaste composition filled in a pump type container or an aerosol type container, the temperature dependence of the viscosity of the composition becomes small,
Improved extrusion hardness at low temperature, even when stored and extruded at low temperature, it is smoothly extruded through a narrow channel, improving usability and not lowering shape retention,
In addition to maintaining good shape-retaining property, when the composition is extruded through a narrow channel, it is subjected to an action such that it is re-kneaded if flow is obstructed in this channel, and thus the extruded composition is The present invention has been made based on the finding that there is no liquid separation and has a good appearance, and therefore the drawback that the crosslinked polyacrylic acid and its salt cause liquid separation can be solved. .

Therefore, the present invention comprises a filling portion filled with contents, and an outlet portion having a narrow flow path that obstructs the flow, and the fine flow path obstructing the flow is 1/30 or less of the cross-sectional area of the filling portion. Pores, slits or nozzles having a cross sectional area of
A pump container or aerosol that is formed in the mesh of a cloth or mesh of 300 mesh and is re-kneaded in the above flow passage when the content flows from the filling section through the flow passage to the outside from the outlet. A flowable composition to be filled in the filling part of the container, characterized in that a water-insoluble powder as the flowable composition and a crosslinkable polyacrylic acid and / or a salt thereof as a binder are used. The present invention provides a fluid composition.

Hereinafter, the present invention will be described in more detail.

Composition of the Invention The flowable composition according to the present invention uses polyacrylic acid and / or a salt thereof as a binder as described above, and is thereby filled in a container having a narrow flow path that obstructs flow. It is possible to obtain a toothpaste composition and a fluid composition such as a liquid or kneading cleanser suitable for being processed.

Here, as the cross-linked polyacrylic acid and its salt, any of acid type, sodium salt type, ammonium salt type and the like can be used, and one kind or two or more kinds thereof can be blended. Specifically, as the acid type, Carbopol 940, Carbopol 934, Carbopol 941 (all manufactured by Gutsudrichchi), Junron PW-110, Junron PW.
Examples include -111 (all manufactured by Nippon Pure Chemical Co., Ltd.), sodium salt type Rheodic 250H and Rheodic 835H, and ammonium salt type Rheodic 305H (all Nippon Pure Chemicals). As these cross-linked polyacrylic acids and salts thereof, those having a 0.5% aqueous solution viscosity (B-type rotational viscometer, 20 rpm, 25 ° C.) of 1.500 cps or more, and more preferably 7,000 to 80,000 cps are preferably used. To be The viscosity of the acid type is a value measured by neutralizing with sodium hydroxide.

The amount of cross-linked polyacrylic acid and / or its salt is preferably 0.3 to 2.5% (same as below by weight) of the entire composition. In the present invention, in addition to the cross-linked polyacrylic acid or its salt, other binders, such as sodium carboxymethyl cellulose, xanthan gum, hydroxyethyl cellulose, gum arabic, polyvinyl alcohol, etc., may be blended alone or in combination. However, in this case, it is desirable that the cross-linked polyacrylic acid and its salt contain 30% or more of the total amount of the binder. If the content of the cross-linked polyacrylic acid and / or its salt is less than 30% of the total amount of the binder, the extrusion hardness from the container may be deteriorated and the shape retention property may be deteriorated.

The fluid composition of the present invention further contains water-insoluble powder.

Here, the water-insoluble powder includes primary calcium phosphate,
Dibasic calcium phosphate dihydrate and anhydrate, tribasic calcium phosphate, calcium pyrophosphate, calcium carbonate, calcium sulfate, apatite, tribasic magnesium phosphate, magnesium carbonate, insoluble sodium metaphosphate, precipitated silica, aluminosilicate, etc. One or more of silica, aluminum oxide, aluminum hydroxide, lysine and the like may be blended (the blending amount varies depending on the type of the composition, but in the case of toothpaste, it is usually 5 to 60).
%). In this case, when powder that elutes divalent or more metal ions is used, crosslinked polyacrylic acid and / or
Alternatively, xanthan gum is preferably used in combination with a salt thereof in a weight ratio of 3: 1 to 1: 2, and when silica is used, crosslinked polyacrylic acid and / or a salt thereof is used with sodium carboxymethyl cellulose, particularly 1 % Aqueous solution having a viscosity of 500 centipons or less and an etherification degree of 0.5 to 1.3 are preferably used together in a weight ratio of 3: 1 to 1: 2. The shape retention, dispersibility in the mouth and stability of the composition can be further enhanced.

The composition of the present invention may be blended with usual components used depending on its type. For example, toothpaste compositions further include thickeners such as polyethylene glycol, sorbit, glycerin, propylene glycol, sodium lauryl sulfate, sodium dodecylbenzene sulfonate, hydrogenated coconut fatty acid monoglyceride sodium monosulfate,
Foaming agents such as sodium lauryl sulfoacetate, sodium N-lauroyl sarcosinate, N-acyl glutamate and sucrose fatty acid ester, essential oils such as peppermint and spearmint, and flavoring materials such as l-menthol, carvone, eugenol and anethole. , Saccharin sodium, stevioside, neohesperidyl dihydrochalcone, glycyrrhizin, perillartine, sweeteners such as p-methoxycinnamic aldehyde, preservatives,
A dye or the like can be added, and dextranase, methanase, sorbic acid, alexidine, β-glycyrrhetinic acid, hinokitiol, chlorhexidines, sodium monofluorophosphate, sodium fluoride, fluorinated first
Tin, alkylglycine, alkyldiaminoethylglycine salts, allantoin, ε-aminocaproic acid, tranexamic acid, azulene, vitamin E, water-soluble primary or secondary phosphates, quaternary ammonium compounds such as cetylpyridinium chloride, sodium chloride It is also possible to mix active ingredients such as crude drug extracts.

In addition, the components that are usually used can be used when manufacturing a cleanser and the like.

In the present invention, a filling portion filled with contents, and an outlet portion having a narrow flow path that obstructs the flow, the thin flow path obstructing the flow is 1/30 or less of the cross-sectional area of the filling portion. , Especially pores having a cross-sectional area of 1/100 or less, slits or nozzles or formed in the mesh of a cloth or mesh of 5 to 300 mesh, the contents from the filling portion through the flow path As a fluid composition filled in the filling portion of the pump container or the aerosol container that is re-kneaded in the flow path when flowing out from the outlet, the water-insoluble powder and the cross-linked polyacrylic acid and / or Alternatively, the one containing a salt thereof is used.

Here, as such a container, a pump type container, an aerosol type container or the like is used, and for example, the container as shown in FIGS. 1 and 2 is used. That is, the container of FIG. 1 impedes the flow of the composition flow outlet 4 by pressing the head 3 with a fluid composition such as a toothpaste composition filled in the composition filling section 2 in the container body 1. It is designed to flow out from the outlet 6 through the narrow flow path 5. The container of this type is, for example, SAI 54-34641, S55-38783, S56-4.
6572, Shokai 56-100378, Shokai 56-121677, Shokai 57-4
4041, 57-74168, 57-164079, 57-68
367, those described in JP-A-57-68368, and the like.

The container shown in FIG. 2 is a double can type aerosol container, where 1a is an inner can, 1b is an outer can, 2 is a filling part, 4 is an outlet part, 5 is a narrow channel, and 6 is a container. An outlet, 7 is a grommet, 8 is a housing, 9 is a spring, 10 is an inner gasket, and 11 is a stem. The aerosol type container is not limited to the one shown in FIG.
For example, a single can type may be used, and conventionally known aerosol type containers can be effectively used.

Further, the container usable in the present invention is,
16208, 45-18115, 46-701.
1, No. 46-9820, No. 46-27678, No. 46-36224, No. 47-2702, No. 47-2.
No. 695, No. 47-2696, No. 48-31086.
No. 48, No. 48-38041, No. 53-522, No. 53
No. 33334, No. 54-30270 and the like can be used, and any container having a narrow flow path that obstructs the flow of the fluid composition at the composition flow outlet can be used.

In this case, this narrow channel is formed by pores, slits, nozzles, etc., but its cross-sectional area is 1/30 of the cross-sectional area of the filling part.
The following, especially 1/100 or less is preferably used (Note that the cross-sectional area ratio of a normal toothpaste tube is 1/15 to 1/20.
Is). Further, the fine flow path can be formed in the mesh of cloth or mesh, but in this case, the size of the mesh is preferably 5 to 300 mesh.

EFFECTS OF THE INVENTION The flowable composition of the present invention has good extrusion hardness at low temperature and good shape retention by incorporating a cross-linking polyacrylic acid and / or a salt thereof as a binder. Therefore, it is possible to preferably use a container having a narrow flow path that obstructs the flow, even if using a container of this kind, the composition can be smoothly flowed out at low temperature, and even if a shearing action is applied to the flow path. In addition to having good shape retention, the composition is re-kneaded as it passes through the flow path, so that the composition flowing out does not undergo liquid separation.

Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples.

The following examples are examples of toothpaste compositions, but these compositions were prepared by a conventional method. At this time, when the acid type was used as the cross-linked polyacrylic acid salt, an aqueous solution of sodium hydroxide, potassium hydroxide, sodium carbonate or the like was added and neutralized before blending the powder base.

[Example 1] [Example 2] [Example 3] [Example 4] [Example 5] [Comparative example] In each of the toothpaste compositions of Examples 1 and 2 and Comparative Example described above, the diameter of the narrow flow path which obstructs the flow at the outlet of the composition flow is 5.
6 mm, the cross-sectional area is 1 / the cross-sectional area of the composition-filled part
34 was filled in the vertical pump type container shown in FIG.

Next, these compositions were evaluated for low temperature extrusion hardness and shape retention by the following methods. The results are shown in Table 1.

Low Temperature Extrusion Hardness The toothpaste composition was stored in the above-mentioned container at -5 ° C for one week and then extruded at -5 ° C to evaluate the extrusion hardness.
In this case, the extrusion was carried out according to the usual method of use, so that about 1 g of the content was extruded from the outlet at a speed of about 0.5 seconds.

The evaluation criteria for the extruded hardness are as follows.

Evaluation Criteria O: Easy to extrude and good.

B: Poor extrusion.

X: The composition does not come out even when pressed, or the extrusion is extremely poor.

Shape retention The toothpaste composition was extruded from the above container onto a toothbrush and evaluated for shape retention. In this case, the extrusion method is the same as the above method.

The evaluation criteria for shape retention are as follows.

Evaluation criteria ◎: Very good ○: Good.

X: Flows from the toothbrush.

From the results shown in Table 1, it is recognized that the toothpaste compositions of Examples 1 and 2 are easily extruded from the container having a fine flow path even when stored at low temperature and have very good shape retention. It was In addition, in Examples 1 and 2, liquid separation was not observed when extruded.

Further, the toothpaste compositions of Examples 1 to 5 were filled in an aerosol type container having a composition flow passage having a cross-sectional area of 0.785 mm ² and a filling portion having a cross-sectional area of 1017 mm ² , at 20 ° C. And, after being stored at -5 ° C for 1 month, they were used at an injection pressure of 7 kg / cm ² , and both of them maintained good low temperature extrusion hardness and shape retention.

No liquid separation occurred in any of the extruded toothpastes, which had a good appearance.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a container used in the present invention, and FIG.
The figure is a schematic sectional view showing another example of the container used in the present invention. 1 ... Container body, 2 ... Filling section, 4 ... Outflow port section, 5 ...
… Thin channel, 6 …… Outlet.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-101418 (JP, A) Actually opened 57-164079 (JP, U) Actually opened Sho 56-100378 (JP, U) Actually opened 54- 34641 (JP, U) Actual development Sho 55-38783 (JP, U)

Claims (1)

[Claims] 1. A filling part for filling contents and an outlet part having a narrow flow path for obstructing the flow, wherein the thin flow path for obstructing the flow is 1/30 or less of a cross-sectional area of the filling part. Pores, slits or nozzles having a cross-sectional area which is
Formed in the mesh of cloth or mesh of mesh,
In a fluid composition filled in the filling portion of a pump container or an aerosol container that is re-kneaded in the flow passage when the content flows from the filling portion through the flow passage to the outside from the outlet, A fluid composition comprising a water-insoluble powder as a fluid composition and a crosslinkable polyacrylic acid and / or a salt thereof as a binder.