JPH09110664A - Denture cleaner - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To develop a denture cleaner that is excellent in cleaning effects on denture stains, especially stain stains, is not harmful to metal for dentures, and has good storage stability. SOLUTION: As an oxygen-based bleaching component, 1 to 19% by weight of potassium monopersulfate and 31 to 31 of sodium perborate are used.
80% by weight, tetraacetic ethylenediamine 0.5 to 10% by weight, and sodium tripolyphosphate 5
˜30 wt%, and the pH value of the 1 wt% aqueous solution is adjusted to 8-11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denture cleansing agent which is excellent in the effect of removing denture stains, has low harm to denture metal, and has good storage and solidification stability.

[0002]

2. Description of the Related Art Denture stains include food residues, denture plaques, stains (colored deposits: tea astringent stains), etc. Of these, food residues and denture plaques are relatively easy to brush. However, stains are difficult to remove by these methods.

However, in the denture, not only the teeth but also the mucous membrane of the palate and gingiva are made of resin or metal, so that the area to be soiled is large and the soiling is easily noticeable. It is not preferable from the viewpoint of beauty and aesthetics, and it is desired to effectively remove stains.

In partial dentures which occupy half of the dentures, it is difficult to clean metal parts such as clasps and bars with a dentifrice, so it is preferable to use a denture cleanser. There is a problem of corrosion.

Under these circumstances, various denture cleansing agents have been proposed, but none of them are at a satisfactory level in all of the above-mentioned problems, and in particular, they have excellent cleaning power for stains on dentures and partly. There has been a demand for the development of a denture cleanser that can be used with confidence in denture fittings.

The present invention has been made in order to meet the above-mentioned demands and is excellent in the cleaning power for stains on dentures, especially stain stains such as brown astringent, and is not harmful to metal for dentures, and has good storage stability. An object of the present invention is to provide a denture cleanser having

[0007]

Means for Solving the Problems and Modes for Carrying Out the Invention As a result of intensive studies to achieve the above object, the present inventor has found that potassium hydrogen persulfate (A) is used as an oxygen-based bleaching component (stain removing component). Component) 1 to 19 wt% and sodium perborate (B component) 31 to 80 wt%, tetraacetic ethylenediamine (hereinafter abbreviated as TAED) 0.5 to 10 wt%, and sodium tripolyphosphate 5
-30% by weight and by adjusting the pH value of a 1% by weight aqueous solution to 8-11, excellent denture stain cleaning power can be exhibited, and the denture alloy has low toxicity,
Moreover, it has been found that a denture cleanser having excellent long-term storage stability can be obtained.

That is, the components A and B, which are oxygen-based bleaching agents, and the bleach activator, TAE, are components of the denture cleansing agent.
D and condensed phosphate are known, respectively (JP-A-63-86).
799, JP-A-2-22217, and JP-A-3-21541.
(See Japanese Patent Publication No. 3), in most of these implementations, the amount of the component A was excessively large in the A / B mixing ratio.

On the other hand, by mixing the components A, B, TAED and sodium tripolyphosphate in the above specified ratios and adjusting the pH when dissolved in water (1% by weight aqueous solution) to the above specified range, dentures It has excellent detergency for deposited astringent tea stains, low damage to denture metal (black discoloration, corrosion, etc.) and good storage stability. The addition of the acidic phosphoric acid salt provides more excellent stability (prevention of moisture absorption and solidification, improvement of performance deterioration) during long-term storage.

Therefore, according to the present invention, 1 to 19% by weight of potassium monopersulfate and 31 to 80 of sodium perborate are used.
% By weight, and tetraacetic ethylenediamine to 0.
5-10% by weight and sodium tripolyphosphate 5-3
Containing 0% by weight and the pH of a 1% by weight aqueous solution
Provided is a denture cleanser having a value of 8 to 11.

The present invention will be described in more detail below. The denture cleaner of the present invention comprises potassium monopersulfate (A component) and sodium perborate (B component) as oxygen bleaching components, and tetraacetic ethylenediamine. (TAED) and sodium tripolyphosphate.

The content of potassium monopersulfate is 1 to 19% by weight, preferably 5 to 15% by weight of the total detergent.
% By weight. If the blending amount is less than 1% by weight, the foamability when administered in water is weak and the granular preparation does not dissolve uniformly, so the desired detergency cannot be obtained, and if it exceeds 19% by weight, the black denture metal is used. There is a risk of change.

The content of sodium perborate is 31 to 80% by weight, preferably 35 to 60% by weight, based on the entire detergent. If the blending amount is less than 31% by weight, the amount of active oxygen is small and sufficient detergency cannot be obtained. If the blending amount exceeds 80% by weight, the detergency is saturated, and further addition becomes meaningless.

In the cleaning agent of the present invention, the mixing ratio of the above two kinds of oxygen bleaching agents is such that the component B is in excess of the component A in terms of prevention of blackening of the denture metal and storage stability. However, considering the detergency, the weight ratio of the component A / component B is 1/2 to 1/30, especially 1 / 4.1 to 1
It is desirable to set it in the range of / 10, especially 1 / 5.1 to 1/8. Further, in the above mixing ratio, A and B
It is preferable that the total amount of the components blended is 45% by weight or more, especially 50 to 70% by weight based on the entire detergent, and if the total amount blended is less than 45% by weight, high cleaning performance may not be exhibited.

It is possible to mix sodium percarbonate in place of the above-mentioned component B, sodium perborate, or to replace a part of sodium perborate with sodium percarbonate. In this case also, the present invention is excellent. It does not impair the cleaning effect.

Next, the compounding amount of TAED is 0.5 to 10% by weight, preferably 2 to 8% by weight, based on the whole detergent.
When the content of TAED is less than 0.5% by weight, the amount of peracid generated is small and sufficient detergency cannot be obtained. When it exceeds 10% by weight, the detergency is saturated and addition of more than that is meaningless. Is.

Further, the content of sodium tripolyphosphate is 5 to 30% by weight, preferably 10 to 20% by weight. When the compounding amount of sodium tripolyphosphate is less than 5% by weight, sufficient detergency cannot be obtained, and when it exceeds 30% by weight, the detergency is saturated, and further addition is meaningless.

The denture cleanser of the present invention may contain other optional components in addition to the above essential components. As an optional component, specifically, as a surfactant, for example, a sodium ester lauryl sulfate, a sulfate ester type anion active agent such as sodium EO-added alkyl ether sulfate, sodium dodecylbenzene sulfonate, sodium α-oleyl sulfonate, N-lauroyl methyl taurine. Sulfonic acid-based surfactants such as sodium, carboxylic acid-based surfactants such as sodium lauroyl sarcosine, anionic surfactants such as phosphoric acid-based surfactants such as EO-added alkyl ether sodium phosphate, EO-added alkyl ethers, etc. Examples thereof include alkyl ether-based nonionic surfactants, alkylphenyl ethers such as EO-added nonylphenyl ethers, and nonionic surfactants such as dialkyl ether-based nonionic surfactants. The amount of the surfactant added is preferably 0 to 8% by weight, particularly 0.2 to 5% by weight. If the blending amount exceeds 8%, the disappearance of bubbles in the washing container becomes worse.

Generally, a denture cleansing agent contains an organic acid such as citric acid or sulfamic acid as a foaming component.
The cleaning agent of the present invention contains excess B in peroxide as a bleaching component.
Component (alkaline) and small amount of A component (acidic), and T
When AED and sodium tripolyphosphate are combined, pH when dissolved in water (1% by weight aqueous solution of detergent)
By adjusting to 8 to 11, rich and fine oxygen bubbles (oxygen generated by decomposition of sodium perborate) can be distributed in the cleaning liquid, so that an organic acid as a foaming component is included. You don't have to.

It is preferable to add an enzyme as an optional component, and examples of the enzyme include alkaline protease, dextranase, β-1,3-glucanase, mutanase, amylase and the like. The amount of the enzyme added is preferably in the range of 0.05 to 10% by weight based on the total detergent.

Further, as an optional component, for example, a binder such as polyvinylpyrrolidone, lactose, or Avicel, various fragrances, dyes and the like can be blended. In addition, the addition amount of these optional components can be a usual amount as long as the effects of the present invention are not impaired.

The denture cleanser of the present invention may be prepared in a liquid form or, if necessary, prepared in the form of powder, granules or tablets and dissolved in a solvent at the time of use to be used as a liquid form. However, in consideration of cleaning performance and harmfulness to the skin, the pH value when dissolved in water (p of a 1% by weight aqueous solution)
It is necessary to adjust the H value) to 8 to 11, preferably 8.5 to 10.5. If the pH value when dissolved in water is less than 8, sufficient detergency cannot be obtained, and if the pH value exceeds 11, the safety of the hands and fingers due to alkali becomes a problem. The detergent of the present invention exhibits both the excellent detergency and the safety to the skin by exhibiting the above pH range from immediately after being added to water to the end of washing in use.

The pH of the denture stabilizer is adjusted by adding an inorganic acid phosphate such as disodium dihydrogen pyrophosphate and disodium dihydrogen phosphate as a pH adjuster in view of storage stability. preferable. The amount of the above-mentioned acidic phosphate can be adjusted according to pH, but it is usually 0 to 30% by weight, preferably 5 to 15% by weight. In this case,
When a pH adjusting agent such as an organic acid such as citric acid or sulfamic acid or a salt thereof which is generally used for a denture cleanser is used, moisture absorption and solidification may be induced.

[0024]

EFFECT OF THE INVENTION The denture cleanser of the present invention has excellent cleaning power for stains on dentures, especially stain stains such as tea astringency, is not harmful to metal for dentures, and has good storage stability. It is safe for the skin and can be effectively used for cleaning dentures.

[0025]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to experimental examples and examples, but the present invention is not limited to the following examples. In addition, all% in each example are weight%. The pH when dissolved in water is the pH of a 1% by weight aqueous solution of the detergent.

[Experimental Example 1] Denture cleaners having the compositions shown in Tables 1 and 2 were prepared, and the tannin stain (tea astringent) cleansing power was evaluated by the following method. The results are shown in Tables 1 and 2. (1) Preparation of Tannin Stain (tea astringent) dirt After the surface of an acrylic white plate (20 mm x 20 mm) was rough-polished with sandblasting, this plate was treated with an albumin solution, a tannin solution (an extract of Japanese tea, coffee, and black tea), Sequential dipping in a ferric chloride solution was repeated to prepare tannin stain soil chips. (2) Evaluation of Detergency The color difference (E1) of the acrylic white plate and the color difference (E2) of the tannin stain stain chip prepared as described above were measured. The E2 tannin stain stain chip was hung in a beaker filled with 150 ml of distilled water (25 ° C), 3 g of the detergent sample shown in Tables 1 and 2 was administered, and a washing test was performed for 30 minutes while maintaining the temperature at 25 ° C. It was

Next, the washed dirt chips are washed with water and dried.
Then, the color difference (E3) is measured, and the cleaning rate is calculated according to the following formula.
Along with the calculation, the detergency was evaluated according to the following criteria. Tannin stain cleaning rate (%) = [(E3-E2) /
(E1-E2)] × 100 Evaluation criteria Tannin stain cleaning rate ○: 80% to 100% △: 50% to 80% ×: less than 50%

[0028]

[Table 1]

[0029]

[Table 2]

From the results of Tables 1 and 2, it was confirmed that the denture cleanser of the present invention is excellent in tannin stain (brown astringent) cleansing power.

[Experimental Example 2] The denture cleaners shown in Table 3 were prepared, and the damage (blackening) to the metal for dentures was evaluated by the following method. Table 3 shows the results. (1) Evaluation method for harmfulness (blackening) to metal for dentures The surface of gold-silver palladium alloy pieces (10 mm × 10 mm) was polished by sandblasting to remove the oxidized surface, and the color difference (E1) of the polished surface was measured. Next, after suspending the gold-silver-palladium alloy piece in a beaker filled with 150 ml of distilled water (25 ° C), 3 g of the detergent sample shown in Table 3 was administered, and washing was performed for 2 hours while maintaining the temperature at 25 ° C. . The washed metal piece was washed with water and dried to measure the color difference (E2), the black discoloration difference (ΔE) was calculated according to the following formula, and the metal-damaging property was evaluated according to the following criteria. Black discoloration difference: ΔE = E2-E1 evaluation standard Black discoloration difference (ΔE) ○: Less than 3 △: 3 or more and less than 6 ×: 6 or more

[0032]

[Table 3]

From the results shown in Table 3, the denture cleanser of the present invention is
It was confirmed that the harmfulness (blackening) to the denture metal was very low.

[Experimental Example 3] The denture cleaners shown in Table 4 were prepared and evaluated for storage and solidification stability by the following method. Table 4 shows the results
Shown in (1) Evaluation Test Method for Storage and Solidification Stability 100 g of the denture cleanser shown in Table 4 was put in a 250 ml plastic bottle, a hole having a diameter of 1 mm was opened in the lid, and 40 ° C., RH75
% In a thermo-hygrostat. After one month, the bottle was taken out and solidification of the preparation was evaluated according to the following evaluation criteria. Solidification Evaluation Standard A : 40 ° C./75% RH No solidification at 1 hour. ◯: 40 ° C./75% RH Some solidification in 1 hour, but there is no problem in fluidity. Δ: 40 ° C./75% RH Slightly solidified in 1 hour. X: Solidified at 40 ° C./75% RH for 1 hour.

[0035]

[Table 4]

From the results of Table 4, the denture cleanser of the present invention is
It was confirmed that the storage and solidification stability was excellent.

Example 1 The following components were kneaded and granulated to prepare a granular denture cleanser (pH when dissolved in water: 9.8). Potassium monopersulfate 10% Sodium perborate 50 TAED 5 Sodium tripolyphosphate 15 Sodium lauryl sulphate 1 Alcalase 0.5 Carboxymethylcellulose sodium 4 Lactose sodium disulfate Balance meter 100.0%

Example 2 The following components were powder mixed to prepare a powdery denture cleaner (pH 10.
1). Potassium monopersulfate 12% Sodium perborate 50 TAED 4 Sodium tripolyphosphate 20 Sodium lauryl sulfate 4 Alcalase 1 Magnesium oxide 2 Sodium sulfate Balance meter 100.0%

Example 3 The following components were powder mixed to prepare a powdery denture cleaner (pH 9.9 when dissolved in water). Potassium monopersulfate 16% Sodium perborate 32 TAED 2 Sodium tripolyphosphate 20 Sodium lauryl sulfate 2 Alcalase 2 Magnesium oxide 1.5 Sodium carbonate Balance meter 100.0%

Example 4 The following components were powder-mixed to prepare a powdery denture cleanser (pH 10 when dissolved in water.
5). Potassium monopersulfate 2% Sodium perborate 60 TAED 5 Sodium tripolyphosphate 15 Disodium dihydrogen pyrophosphate 5 Sodium lauryl sulfate 2 Alcalase 1 Magnesium oxide 2 Sodium carbonate Balance meter 100.0%

[Example 5] The following ingredients were tabletted to prepare a denture cleanser for tablets (pH 9.2 when dissolved in water). Potassium monopersulfate 19% Sodium perborate 35 TAED 2 Sodium tripolyphosphate 10 Sodium lauryl sulfate 2 Sulfamic acid 5 Alcalase 1 Lactose 2 Polyvinylpyrrolidone 2 Sodium sulfate Balance meter 100.0%

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI technical display location C11D 7:32) (72) Inventor Ken Naganuma 1-3-7 Main Office, Sumida-ku, Tokyo Rio Within the corporation

Claims (2)

[Claims] 1. 1 to 19% by weight of potassium monopersulfate, 31 to 80% by weight of sodium perborate, and 0.5 to 10% by weight of tetraacetic ethylenediamine.
And 5 to 30% by weight of sodium tripolyphosphate, and a 1% by weight concentration aqueous solution having a pH value of 8 to 11. 2. The denture cleanser according to claim 1, further comprising an inorganic acid phosphate as a pH adjuster.