JPH0597640A - Dentrue detergent - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a denture cleansing agent that satisfies both tartar removal power and cleansing power at the same time. [Constitution] Ethylenediaminetetraacetic acid and its salt, and one or more kinds of tartar-removing components selected from nitrilotriacetic acid and its salt, and percarbonate as a bleaching agent, containing 10 to 90% by weight of percarbonate. P of the aqueous solution containing the concentration
When H is 8 to 11, a denture cleaner, and, in addition to the above components, tetraacetyldiamine and / or tetramethylpiperidinol are blended, the percarbonate is 10 to 90% by weight. The pH of the aqueous solution containing 4 is 4
Provided is a denture cleanser characterized by being -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 having both excellent tartar removing power and excellent cleaning power.

[0002]

2. Description of the Related Art As a denture is used, stains due to the deposition of pigments in foods and drinks such as coffee and tea, the deposition of cigarette tar and the like, and the deposition of tartar.

In order to remove such stains and tartar, denture cleansing agents have been conventionally used, and various proposals for such denture cleansing agents have been made.

For example, EDTA is used in combination with sodium perborate or potassium monopersulfate, and the average pore size is 90-4.
A solid foaming composition containing 00Å silica gel and preventing deterioration of the cleaning agent due to generation of peroxide gas by absorbing moisture in the silica gel (JP-A-47-
11596), proteolytic enzymes, starch degrading enzymes,
A detergent (water softening agent) is blended to improve the detergency by an enzyme (JP-A-48-58006), and the dissolution rate is controlled by stacking sulfamic acid and EDTA to control the detergency. An improved cleaning agent (JP-A-54
-76836), phosphate, sodium perborate,
Polymer fluorocarbon, chelating agent (EDTA, NT
A), a denture cleaner suitable for forming a tablet form (JP-A-59-205309), an alkaline layer (containing active oxygen) and an acidic layer (containing quaternary ammonium salt and acidic substance). Denture cleaning agent (Japanese Patent Laid-Open No. 61-225116) and sulfated aliphatic alcohol cleaning agent, which are laminated, washed with an alkaline layer and bleached to efficiently remove tartar and stain in an acidic layer , Chelating agent,
Spray type denture cleaner containing water (Japanese Patent Laid-Open No. 62-8
No. gazette) is proposed. Further, a denture cleaner containing percarbonate as a main component (JP-A-55-111414) and a cleaner for removing tartar by acidification with a solid organic acid or potassium monopersulfate (JP-A-55-114) 51-7
No. 0831), potassium monopersulfate, fruit acids (citric acid, etc.), and carbonates (Japanese Patent Laid-Open No. 55-
No. 55110) is also proposed.

Further, tetraacetyldiamine (TAE
D) as a denture cleaner containing a bleaching activator, sodium bicarbonate, sodium carbonate, citrate, sodium perborate,
A denture cleanser containing potassium monopersulfate, organic phosphonic acid and TAED (Japanese Patent Laid-Open No. 22217/1990) has been proposed.

[0006]

However, there are relatively few proposals for efficiently removing tartar and stains at the same time, and it is found in JP-A-61-225116 and JP-A-51-70831. It can be done.

Therefore, a denture cleansing agent having both excellent tartar removal power and stain cleaning power at the same time is further desired.

[0008]

Means and Actions for Solving the Problems As a result of intensive studies to meet the above-mentioned demand, the present inventor has found that ethylenediaminetetraacetic acid or a salt thereof (hereinafter, referred to as EDTA including a salt) or trinitrilolotriacetic acid or a salt thereof. A salt (hereinafter referred to as NTA including the salt) is used in combination with a percarbonate, and in this case, the pH when the denture cleaner is used (percarbonate is 10
~ 90% (wt%, the same applies below) of the aqueous solution containing p
It has been found that it is effective to set H) in the range of 8-11. Furthermore, when tetraacetyldiamine (TAED) or tetramethylpiperidinol (TMP) is blended in addition to EDTA or NTA and percarbonate, effective removal of tartar is possible even if the pH when using a denture cleaner is 8 or less. It was found that the stain removing effect is exerted and that it can be used in a wide range of pH 4 to 11.

That is, as described above, it is known to use EDTA or NTA as a denture cleanser component, but this is taken up as a tartar remover component, and it is proposed that its effect is effectively exhibited in a combined system with a peroxide. Has never been known. That is, according to the study of the present inventors, sodium perborate alone is blended as a bleaching agent, or a mixture of sodium perborate and potassium monopersulfate is blended (most of the denture cleansing agents currently on the market are In the formulated denture cleanser, EDTA and NTA are rapidly decomposed and inactivated by active oxygen generated from these peroxides, especially potassium monopersulfate. That is, when EDTA or NTA is used alone, it shows an excellent effect of removing tartar due to its chelating ability, but when it is mixed with the above-mentioned peroxide, EDTA and NTA are decomposed by active oxygen generated from them. , It does not show sufficient tartar removal effect.

Therefore, in the prior art, EDTA and NTA were not blended for the purpose of removing tartar in the peroxide-containing denture cleaner, but were blended for other purposes.

However, when EDTA or NTA is used in combination with a percarbonate and the denture stabilizer is prepared so that the pH of the aqueous solution at the time of use is 8 to 11, more preferably 8.5 to 11, it is unexpected. Also by its active oxygen EDTA
And NTA are not significantly decomposed and exhibit excellent tartar removal effect, and their stain removal and detergency are superior to the combined system of EDTA or NTA and perborate or monopersulfate. I found out.

Further, when EDTA or NTA is used in combination with percarbonate, the use pH is limited to 8 to 11, but when TAED or TMP is further added to this, the use pH is 4 or more. Expanded to ~ 11, EDTA or NTA
The present invention has been made based on the finding that the stain removal and detergency are remarkably increased even at low pH as compared with the case where TAED or TMP is blended in a combination system of lactic acid and perborate. ..

Therefore, the present invention comprises (1) one or more tartar-removing components selected from ethylenediaminetetraacetic acid and salts thereof and nitrilotriacetic acid and salts thereof, and a percarbonate salt as a bleaching agent, The pH of an aqueous solution containing percarbonate in a concentration of 10 to 90% by weight is 8
To 11, and (2) one or more tartar-removing components selected from ethylenediaminetetraacetic acid and salts thereof and nitrilotriacetic acid and salts thereof, and percarbonate as a bleaching agent. And a tetraacetyldiamine and / or tetramethylpiperidinol as a bleach activator, and the pH of an aqueous solution containing percarbonate in a concentration of 10 to 90% by weight is 4 to 11. Provide a cleaning agent.

The present invention will be described in more detail below. In the present invention, ethylenediaminetetraacetic acid and salts thereof (EDTA.2Na, EDTA.4Na, etc.) and nitrilotriacetic acid and salts thereof (NTA.3Na, etc.) are used as tartar-removing components. To use as. In this case, these are the 1
The seeds may be used alone or in combination of two or more.

The amount of the tartar-removing component blended is preferably 2 to 50%, preferably 5 to 45%, and more preferably 10 to 40% of the total denture cleanser. If the blending amount is less than 2%, satisfactory tartar removal ability may not be obtained in consideration of deterioration during use or aging. If it exceeds 50%, other components such as percarbonate and a pH adjusting agent may not be obtained. The blending amount of citric acid, sodium citrate, baking soda, etc. is relatively decreased, which may cause a decrease in bleaching power and a decrease in foaming power. It is preferably within the range.

On the other hand, as the percarbonate used as the bleaching agent, sodium percarbonate or the like can be used. These percarbonates may be used alone or in combination of two or more.

The content of percarbonate is preferably 10 to 90%, preferably 15 to 70%, more preferably 20 to 60%. When the blending amount is less than 10%, it may not be possible to obtain a satisfactory bleaching power, and when the blending amount of the percarbonate exceeds 90%, since other components are relatively reduced, the tartar removal ability, The foaming power may decrease.

The denture cleanser of the present invention preferably further contains tetraacetyldiamine (TAED) and / or tetramethylpiperidinol (TMP). In this case, the blending amount is preferably 1 to 10% of the whole.

The denture cleanser according to the present invention comprises powder, granules,
It is prepared in the form of tablets, etc., and is dissolved in water at the time of use. In this case, in addition to the above-mentioned components, known ingredients such as pH adjusting agents, citric acid, sodium citrate, sodium bicarbonate, etc. A foaming agent such as sodium carbonate, a fragrance, and a proteolytic enzyme such as alcalase and a surfactant such as sodium lauryl sulfate and sodium linear alkylbenzene sulfonate can be added to further improve detergency. Further, in the case of tablet form, an imparting agent such as polyvinylpyrrolidone and lactose can be mixed.

In the denture cleanser of the present invention, the pH of the aqueous solution when dissolved in water at the time of use (pH of the aqueous solution containing percarbonate at a concentration of 10 to 90%) is the above tartar-removing component and the percarbonate. When used in combination, 8 to 11, more preferably 8.5
It is necessary to appropriately mix and adjust the pH adjusting component such that the pH adjusting component becomes -11, and when it is further mixed with TAED or TMP, it becomes 4-11, more preferably 4.5-11.

[0021]

EXAMPLES The present invention will be described below by showing experimental examples and examples, but the present invention is not limited to the following examples.

[Experimental Example] With respect to the compositions shown in Tables 1 and 2, the tartar removing power and the tobacco tar cleaning power were evaluated by the following methods.

Evaluation of tartar removal ability The composition shown in Table 1 was added to 150 ml of distilled water and dissolved, and the pH was quickly adjusted to 8.5 or 10.5 using a small amount of HCl and NaOH. 0.5g of hydroxyapatite powder was added to this, and it was left at 25 ° C for 2 hours, then filtered, and the amount of eluted Ca was measured by atomic absorption method. did.
The results are shown in Table 1. ⊚: Ca elution amount is 50 mg or more O: Ca elution amount is 40 mg or more and less than 50 mg Δ: Ca elution amount is 20 mg or more and less than 40 mg X: Ca elution amount is less than 20 mg Evaluation of tobacco tar cleaning power First, a membrane filter having a pore diameter of 0.22 μm The color difference E _{1 of} was measured using a color difference meter. Next, the cigarette was sucked through this filter to attach the tar and dried, and then the color difference E ₂ was measured in the same manner as above. After measurement 1
This membrane filter was suspended in a beaker filled with 50 ml of distilled water, the composition shown in Table 1 or Table 2 was added and dissolved in distilled water, and the solution was quickly adjusted to a predetermined pH with a small amount of HCl and NaOH. After holding the membrane filter therein at 40 ° C. for 1 hour, the membrane filter was taken out and dried, and the color difference E ₃ was measured in the same manner as above, and the detergency was calculated according to the following formula. Tobacco tar cleaning power = [(E ₃ −E ₂ ) / (E ₁ −E ₂ )] ×
100 The calculated detergency was evaluated according to the following criteria. The measurement results are shown in Tables 1 and 2.

The evaluation criteria are as follows. ⊚: Detergency of tobacco tar is 40% or more ○: Detergency of tobacco tar is 30% or more and less than 40% △: Detergency of tobacco tar is 20% or more and less than 30% ×: Tobacco tar detergency is less than 20%

[0025]

[Table 1]

[0026]

[Table 2] Note: In the above table, EDTA: ethylenediaminetetraacetic acid 2Na NTA: nitrilotriacetic acid 3Na PC: sodium percarbonate OX: potassium monopersulfate PB: sodium perborate TAED: tetraacetyldiamine TMP: tetramethylpiperidinol

From the results of Table 1 and Table 2, EDTA or N
A single combination system of TA and PC has a Ca elution amount of pH 8 or more,
Both of the cleaning powers of tobacco tar show satisfactory results, and it is recognized that they have both tartar removal power and cleaning power.
It is also found that when TAED or TMP is added to this, the detergency is further increased and the detergency is good even in weak acidity.

On the other hand, when OX is used, the cleaning power of the tobacco tar is good, but the elution amount of Ca is low and the tartar removal effect is poor. On the other hand, when PB is used,
The Ca elution amount was good, but the cleaning power for tobacco tar was insufficient.

Examples will be shown below. In the following examples, the pH value is 15 g for 3 g of each detergent (tablets, powder, granules).
PH value after 5 minutes of dissolution in 0 ml of water.

Example 1 Tablets Ethylenediaminetetraacetic acid 2% Sodium percarbonate 30 Citric acid 10 Sodium citrate 10 Polyethylene glycol 1 Sodium lauryl sulfate 0.5 Polyvinylpyrrolidone 1 Sodium benzoate 1.5 Powdered perfume 1 Alcalase 1 Hydrogencarbonate Sodium balance 100.0% pH 8.6

Example 2 Powder Ethylenediaminetetraacetic acid 5% Sodium percarbonate 40 Citric acid 20 Sodium citrate 2 Sodium lauryl sulfate 3.5 Polyvinylpyrrolidone 2.5 Sodium benzoate 1 Powdered fragrance 1 Alcalase 0.5 Sodium hydrogencarbonate Residual 100.0% pH 9.1

[Example 3] Granules Ethylenediaminetetraacetic acid 10% Sodium percarbonate 30 Citric acid 10 Sodium citrate 5 Polyethylene glycol 1 Sodium lauryl sulfate 1 Polyvinylpyrrolidone 1.5 Sodium benzoate 1 Powdered fragrance 1 Alcalase 1.5 Hydrogencarbonate Sodium balance 100.0% pH 8.7

Example 4 Tablet Ethylenediaminetetraacetic acid 30% Tetraacetyldiamine 1 Sodium percarbonate 20 Citric acid 5 Sodium citrate 10 Polyethylene glycol 1 Sodium lauryl sulfate 1.5 Polyvinylpyrrolidone 1 Sodium benzoate 1 Powdered perfume 1 Alcalase 0 .5 Sodium hydrogen carbonate Residual 100.0% pH 7.7

[0034]

The denture cleansing agent of the present invention has both excellent tartar removing power and excellent cleaning power.

Claims (2)

[Claims] 1. One or two selected from ethylenediaminetetraacetic acid and salts thereof and nitrilotriacetic acid and salts thereof.
A denture cleanser containing at least one tartar-removing component and a percarbonate as a bleaching agent, wherein the pH of an aqueous solution containing the percarbonate at a concentration of 10 to 90% by weight is 8 to 11. 2. One or two selected from ethylenediaminetetraacetic acid and salts thereof and nitrilotriacetic acid and salts thereof.
Containing at least one tartar-removing component, a percarbonate as a bleaching agent, and tetraacetyldiamine and / or tetramethylpiperidinol as a bleaching activator.
The denture cleansing agent is characterized in that the pH of the aqueous solution contained at a concentration of ˜90 wt% is 4-11.