JP2808178B2 - Toothpaste composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dentifrice, and more particularly, to a dentifrice binder having excellent properties which could not be obtained conventionally.

[Prior art and problems] The main constituent components of toothpaste are an abrasive, a wetting agent and water, but a binder is also an indispensable additive.

Primarily, the purpose of using the binder is to prevent the separation of the solid component and the liquid component and to stabilize the toothpaste uniformly. is there. For example, various other purposes of addition include improving the dispersibility in the oral cavity to improve the feeling of use, improving the slip and facilitating extrusion from the tube, improving the water retention of the dentifrice, and extruding the toothbrush. In order to improve shape retention when extruding, to improve skin gloss when extruded, etc., the required functions and properties are easy handling, easy dissolution, and sterility during toothpaste manufacturing. After production, rot resistance, chemical resistance, ease of washing, tasteless odor and the like are required.

However, there has not yet been a binder technology that satisfies all of the above-mentioned purposes of use and required functions and properties. There is a technique in which an alkali salt of carboxymethyl cellulose having a degree of etherification of 2.0 or more is used as a binder (JP-A-59-13740).
6). However, a critical disadvantage of the binder according to this technique is that it has no shape retention, so that this binder cannot be put to practical use.

There is a technique in which sodium carboxymethylcellulose is dissolved in a microfibrillated cellulose suspension to obtain a uniform dispersion, and the dried dispersion is used as a binder (Japanese Patent Application Laid-Open No. 61-103818). However, the disadvantages of the binder according to this technique are poor skin gloss, poor rot resistance and chemical resistance, high cost of drying, and the like, so that this binder is also unsuitable for practical use.

[Means for Solving the Problems] The present invention has reached the present invention as a result of intensive studies on the development of an excellent binder.

The present invention is characterized in that a microfibrillated cellulose in the form of a granular material that can be handled as a granular material is used as a binder for dentifrice, and carboxymethyl cellulose having a degree of etherification (hereinafter abbreviated as DS) of 2.0 or more. It is also characterized in that sodium (hereinafter abbreviated as CMC) is used in combination as a binder.

Granular microfibrillated cellulose (hereinafter MFC)
As described in Japanese Patent Application No. 1-289164, MFC in a state of being wetted with water, which can be handled as a powder which is not substantially re-blocked.
That is. For powdery and granular MFCs, the dispersion concentration of the MFC can be reduced to 10-60% by filter press or other means.
It is a MFC that can be dehydrated to a certain degree and then handled as a non-reblockable powder obtained by pulverization. When used as a dentifrice binder, the solid concentration as MFC is desirably about 20 to 50%. If the solid content concentration is 20% or less, it is difficult to obtain a powdery or granular MFC that does not reblock, and furthermore, the amount of mixed water increases, and the degree of freedom in dentifrice prescription becomes extremely small. .

If the solid content exceeds 50%, the redispersibility deteriorates, and the energy required for redispersion during use becomes excessive, which is not preferable.

In some cases, the use of MFC alone may be unsatisfactory in toothpaste dispersion stability, slippage, water retention, skin luster, etc.In such cases, all issues can be solved by using CMC with DS2.0 or higher as a binder. Excellent toothpaste can be obtained. If a CMC of DS2.0 or less is used, it becomes an unsatisfactory binder in functions such as slipping, skin gloss, rot resistance and chemical resistance. The mixing ratio of MFC and CMC is preferably MFC / CMC = 1/5 to 4/1.

When MFC / CMC is 1/5 or less, extrudability and shape retention are unsatisfactory, and when MFC / CMC is 4/1 or more, dispersion stability and
Unsatisfactory in slip, water retention, skin gloss, etc.

[Examples and Effects of the Invention] The present invention will be described below with reference to examples.

Toothpaste was manufactured according to the prescription in Table 1, and its function and quality were evaluated.

Table 1 Toothpaste formula Dibasic calcium phosphate 42.00% Glycerin 18.00% Granular MFC Note 1) 2.00% CMC (DS2.4) Note 2) 0.50% Sodium lauryl sulfate 1.20% Saccharin 0.09% Flavor 1.10% Butyl paraoxybenzoate 0.01% Water 35.10% Total 100.00% Note 1) This invention product with a solid content of 25%.

Note 2) Ernest Gum FDM manufactured by Daicel Chemical Industries, Ltd.

The dentifrices manufactured according to the prescriptions in Table 1 were satisfactory in terms of economy, simplicity of manufacturing operations, various required functions and quality.

[Effects of the Invention] The granule binder according to the present invention has the following effects on dentifrice production.

1) Because it can be treated as a granular material and has two components, MFC and water, it has a higher degree of freedom in terms of equipment, workability, and formulation than conventional slurry MFC. It has increased dramatically.

2) The resulting dentifrice is superior to conventional dentifrice in terms of function and quality, and is particularly excellent in the following points.

・ Excellent extrudability from tube due to good slip and thixotropic properties.

 ・ Excellent shape retention when extruded onto toothbrush.

 ・ Good skin gloss when extruded.

・ Rotification resistance (cellulase resistance) is comparable to synthetic paste.

Claims (3)

(57) [Claims] 1. A dentifrice composition comprising a microfibrillated cellulose in the form of a powder having a solid content of 20 to 50%. 2. The dentifrice composition according to claim 1, wherein an alkali salt of carboxymethyl cellulose having a degree of etherification of 2.0 or more is used in combination. 3. The dentifrice composition according to claim 2, wherein the mixing ratio of the microfibrillated cellulose and the alkali salt of carboxymethylcellulose is 1/5 to 4/1 in terms of solids weight ratio.