JPH11246891A - Liquid cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid cleanser composition maintaining good cleansing powers against persistent stains adhered to hard material surfaces and soft material surfaces, not damaging the surfaces and having improved rinsability by sphering water-insoluble powder as grinding powder. SOLUTION: This liquid cleanser composition contains water-insoluble spherical powder. The powder preferably has a Wadel sphericity of >=0.90 and an average particle diameter of 0.1-1 μm. A substance constituting the powder is preferably an abrasive having a Mohs hardness of 1-12 and concretely includes amorphous silica. The objective composition preferably comprises the above powder, water and a surfactant in an amount of 5-10 wt.% based on the total amount of the composition. The surfactant is preferably a nonionic surfactant. The composition may further contain a dispersion stabilizer, a low temperature stabilizer, etc. It is preferable that the composition is controlled to a pH of 7-10.5 from the point of dispersion stability security.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of removing fixed dirt which is difficult to remove by ordinary washing, such as scale, darkening, and scorch, which adhere to a hard surface or a surface of a soft material such as plastic. The present invention relates to a liquid cleanser composition which greatly reduces and greatly reduces powder residue at the time of rinsing.

[0002]

2. Description of the Related Art Conventionally, cooking equipment, cooking utensils, bathrooms,
Stubborn dirt fixed on the bathtub etc. is difficult to remove with a general liquid cleaning agent containing surfactants, alkali agents, solvents, etc. as a main component, and in order to remove these dirt,
It is common to use a cleanser type detergent that removes dirt with the abrasive power of the abrasive particles.

[0003] Normally, a cleanser type detergent contains a large amount of water-insoluble powder, which is an abrasive powder, and enhances the detergency by its abrasive power. Therefore, the greater the abrasive powder, and the larger the particle size, the greater the detergency, but with this, in recent years, the increased damage to soft materials such as plastics and fluorine processing has become severe,
In addition, there is a problem that good usability cannot be obtained because powder residue at the time of rinsing increases.

Conventional liquid cleanser compositions include, for example, water-insoluble abrasives (powder) uniformly dispersed in water with a specific surfactant and magnesium sulfate and / or sodium silicate. Those characterized by a combination of an insoluble abrasive, a specific surfactant and a specific component, or a specific combination of the amounts thereof (JP-A-57-16)
No. 098, No. 57-100198,
Nos. -151692, 2-215898, and 2-300299) or those in which the average particle size, particle size distribution, specific surface area, hardness, etc. of the water-insoluble abrasive are limited to specific sizes and the like ( JP-A-59-84999, JP-A-59-140300, JP-A-62-95400, JP-A-63-63794, JP-A-63-69895, JP-A-63-189499, and JP-A-1-170
Nos. 694, 1-29299, 1-30
Nos. 4192, 2-3500, and 2-215
Numerous applications have been filed, such as Nos. 898 and 2-320099.

[0005] However, the water-insoluble powder in the liquid cleanser compositions and the like described in each of the above publications does not specify the particle shape, but usually has an irregular shape in order to improve the detergency. Things. In fact, even if the contents described in each of the above publications are closely examined, it is found that there is no description or suggestion that the particle shape of the water-insoluble powder is spherical, and there is no motivation therefor.

The average particle diameter of the water-insoluble powder in the liquid cleanser compositions and the like described in each of the above publications is 1 μm or more except for publications other than those described below. Of the above publications,
No. 140300 discloses that 200 m is used as an anti-corrosion agent.
Aqueous liquid detergent compositions containing silica having a surface area greater than ² / g and an elementary particle size smaller than 30 nm are described in JP-A 1-292099 and JP-A 1-29299.
JP 304304 and JP 2-3500 each disclose a liquid detergent composition containing a colloidal aluminum oxide thickening agent having an average particle size not larger than 1 μm. The composition is not a cleanser-type detergent, but rather contains silica as an anti-corrosive agent in a dissolved state, and the latter colloidal aluminum oxide thickener does not have abrasiveness. And the use of a particle abrasive having an average particle size of more than 1 μm together with the colloidal aluminum oxide thickening agent. Obviously, the composition does not have the properties of a water-insoluble powder. Therefore, from the contents described in each of the above publications,
It describes or suggests that the average particle size of the water-insoluble powder in the liquid cleanser composition is less than 1 μm, and has no motivation. As described above, in the liquid cleanser compositions and the like described in each of the above publications, in recent years, problems with soft materials such as plastics and fluorine processing that have been increasing, that is, the scratches have become severe, and, at the time of rinsing The problem that good usability cannot be obtained due to an increase in powder residue cannot be solved yet.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and is intended to solve the problem. The present invention is intended to maintain the detergency against stubborn dirt adhered to a hard surface and a soft material surface. An object of the present invention is to provide a liquid cleanser composition that has no scratches and has improved rinsing properties.

[0008]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, that is, the particle shape or average particle size of the water-insoluble powder, the detergency, the rinsing property, As a result of conducting a multifaceted study on the relationship with the scratching property, by making the particle shape of the water-insoluble powder a specific shape, or by specifying the average particle size, the above-mentioned liquid cleanser composition is obtained. They found what they could do, and completed the present invention. That is, the liquid cleanser composition of the present invention is characterized by containing a spherical water-insoluble powder. Further, the liquid cleanser composition of the present invention is characterized by containing a water-insoluble powder having an average particle size of less than 1 μm.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. The liquid cleanser composition of the present invention is characterized by containing a spherical water-insoluble powder as a first invention, and has an average particle diameter of 1 μm as a second invention.
It is characterized by containing less than water-insoluble powder.

(Regarding the First Invention) The water-insoluble powder used in the first invention needs to have a spherical particle shape. By using a water-insoluble powder having a spherical particle shape, while maintaining the detergency against stubborn dirt fixed to the hard surface and the soft material surface, eliminating scratches,
Further, the rinsing property can be made much better. The “spherical shape” defined in the first invention refers to Wadel
Has a sphericity of 0.85 or more, preferably 0.90 or more. Wadel's sphericity refers to the ratio of the diameter of a circle having the same area as the area of the projected image of a particle to the diameter of the smallest circle circumscribing the projected image of the particle.
In the case of 00, the sphere is a true sphere, and becomes smaller as the sphericity value becomes smaller. The projected image is observed with a scanning electron microscope. FIG. 1 is an explanatory diagram for explaining the “sphere” defined in the first invention,
(A) has a Wadel sphericity of 0.85 or more, and (b) has a Wadel sphericity of less than 0.85. 0.85 particle shape with Wadel sphericity
If less than the water-insoluble powder is used, the intended effects of the present invention cannot be exhibited.

The water-insoluble powder having a spherical particle shape used in the first invention has an average particle diameter of less than 10 μm, preferably less than 1 μm, and more preferably less than 1 to 0.1 μm.
It is desirable that If the particle shape used in the first invention is a spherical water-insoluble powder, the average particle size is 10%.
Even if the average particle size of the spherical water-insoluble powder is 1 μm to 1 μm, the effect of the object of the present invention can be exhibited.
When it is less than μm (more preferably, less than 1 to 0.1 μm), there is no further damage, and the rinsing property is greatly improved.

(Regarding the Second Invention) The water-insoluble powder used in the second invention has an average particle size of less than 1 μm, preferably
It is desirable that the thickness be less than 1 to 0.1 μm. By using a water-insoluble powder having an average particle size of less than 1 μm,
While maintaining the detergency against stubborn dirt fixed to the hard surface and the soft material surface, scratches can be eliminated, and rinsing properties can be significantly improved. The water-insoluble powder used in the second invention is a water-insoluble powder having an average particle size of less than 1 μm, even if the particle shape is irregular, and can exert the effects of the object of the present invention. And
Further, if the particle shape of the water-insoluble powder having an average particle size of less than 1 μm is the spherical water-insoluble powder of the first invention, there is no further scratching property, and the rinsing property is greatly improved. .

The spherical water-insoluble powder of the first invention or the compounding amount of the second invention having an average particle diameter of less than 1 μm is 40 to 60% by weight, preferably 4% by weight, based on the total amount of the composition.
5 to 55% by weight. If the amount is less than 40% by weight, satisfactory detergency cannot be obtained, and if it exceeds 60% by weight, the plastic is greatly damaged and the rinsing property is poor.

The substance constituting the water-insoluble powder of the first invention having a spherical shape or the second invention having an average particle diameter of less than 1 μm is as follows:
Both are generally used water-insoluble abrasives, and boron carbide or the like having a remarkably high Mohs hardness is not preferred. A water-insoluble abrasive having a Mohs hardness of about 3 to 12, preferably 7 to 12 is used. . Specific examples include silica, alumina and the like, and more specific examples include amorphous silica, silica sand, fused alumina and the like, but are not limited thereto. These water-insoluble powders can be used alone or in combination of two or more.

[0015] The liquid cleanser composition of the present invention (including the above first invention and the second invention, less than, simply referred to as "the present invention") contains the above-mentioned water-insoluble powder having a spherical or average particle diameter of less than 1 µm. It is desirable to add a surfactant in addition to water (purified water). Examples of the surfactant include an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant. Specific examples of the anionic surfactant include a linear or branched alkylbenzene sulfonate having an alkyl group of 8 to 22, and an alkyl group having an alkyl group of 8 to 2.
Alpha olefin sulfonate 2, alkyl group of 8 to 12
Alkyl ether sulfates, polyoxyethylene alkyl ether sulfates having an alkyl group of 8 to 22 and an average number of moles of added oxyethylene groups of 1 to 6 and the like, and as salts, metal salts such as sodium and potassium and alkanols Examples thereof include organic amine salts such as amines, but are not limited thereto.

Examples of the nonionic surfactant include a nonionic surfactant containing no nitrogen and a nonionic surfactant containing nitrogen. Examples of the nonionic surfactant containing no nitrogen include an ether type nonionic surfactant in which an alcohol ethoxylate having an alkyl group of 6 to 12 and an average number of moles of added oxyethylene groups of 2 to 12 is used. Examples of the alcohol ethoxylate include, but are not limited to, polyoxyethylene 9-moldodecyl alcohol ether, polyoxyethylene 2 mol octyl alcohol ether, and the like. Examples of the nonionic surfactant containing nitrogen include fatty acid alkanolamides and polyoxyethylene-added fatty acid alkanolamides. Examples of these fatty acid alkanolamides include, but are not limited to, coconut oil fatty acid diethanolamide, lauric acid diethanolamide, polyoxyethylene lauric acid diethanolamide, and the like.

Specific examples of the amphoteric surfactant include an alkyl betaine having an alkyl group of 8 to 22, an alkylamidopropyl betaine, an alkyl imidazolinium betaine, an alkyl sulfo betaine and an alkyl phosphobetaine. It is not limited to this.

These surfactants can be used alone or in combination of two or more. Preferably, one or more nonionic surfactants are used. The amount of these surfactants is 2 to 10% by weight, preferably 5 to 10% by weight, based on the total amount of the composition. If the amount is less than 2% by weight, a satisfactory detergency cannot be obtained. If the amount exceeds 10% by weight, problems such as the agent not being able to come out of the container due to viscosity increase are not preferred.

In the present invention, the aforementioned spherical or average particle diameter is 1
In addition to the water-insoluble powder and the surfactant having a particle size of less than μm, if necessary, known components conventionally used in a liquid cleanser composition, such as a dispersion stabilizer, a low-temperature stabilizer, and a fragrance component. Can be blended. Specifically, in order to ensure dispersion stability, for example, carbon number 2
And the like. When this is used, it can be used with an eye that does not impair the effects of the present invention. Specific examples of the hydroxycarbonate include glycolic acid, tartaric acid, gluconic acid, citric acid, malic acid, and salts thereof.

Further, by using a low-temperature stabilizer,
Further, the dispersion stability can be kept in a good state. Specific examples of the low-temperature stabilizer include those selected from the group of monohydric alcohols such as ethanol, isopropanol and isopropynol, and polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol and dipropylene glycol. it can.

Although the fragrance component is not particularly limited, examples of the fragrance component include hydrocarbons such as aliphatic hydrocarbons, terpene hydrocarbons, and aromatic hydrocarbons, aliphatic alcohols, terpene alcohols, and aromatic hydrocarbons. Alcohols such as alcohols, ethers such as aliphatic ethers and aromatic ethers, oxides such as aliphatic oxides and terpene oxides, aliphatic aldehydes, terpene aldehydes, hydrogenated aromatic aldehydes, thioaldehydes, and aromatics Aldehydes such as aliphatic aldehydes, aliphatic aldehydes, aliphatic ketones, terpene ketones, hydrogenated aromatic ketones, aliphatic cyclic ketones, non-benzene aromatic ketones,
Ketones such as aromatic ketones, acetals, ketals, phenols, phenol ethers, fatty acids, terpene carboxylic acids, hydrogenated aromatic carboxylic acids, acids such as aromatic carboxylic acids, acid amides, aliphatic lactones ,
Macrocyclic lactone, terpene lactone, hydrogenated aromatic lactone, lactones such as aromatic lactone, aliphatic ester, furan carboxylic acid ester, aliphatic cyclic carboxylic acid ester, cyclohexyl carboxylic acid ester,
Synthetic flavors such as esters such as terpene carboxylic esters and aromatic carboxylic esters, nitrogen-containing compounds such as nitromusks, nitriles, amines, pyridines, quinolines, pyrroles and indoles, and natural flavors from animals and plants. One or two or more of these fragrances can be combined. The compounding amount is not particularly limited, but is 0.1 to 2% by weight based on the total amount of the composition.

Further, water-soluble polymers for improving usability such as spreadability and viscosity, and those selected from preservatives and antioxidants, and defoamers for improving storage stability can be used. It can be blended in an appropriate amount according to the purpose. Further, the liquid cleanser composition of the present invention has a pH of 5 to 11, preferably 7 to 1, from the viewpoint of ensuring dispersion stability.
It is preferable to adjust to 0.5.

The liquid cleanser composition of the present invention thus constituted contains, for the first time, the surface of a soft material such as plastic or the like due to the water-insoluble powder having a spherical or average particle diameter of less than 1 μm. Dirt can be removed, and further, by reducing powder residue during rinsing, the usability of the cleanser can be improved. Etc.).

[0024]

Next, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Examples 1 to 8 and Comparative Examples 1 and 2 Each composition shown in the following Tables 1 and 2 was prepared by appropriately adding, stirring and mixing using an ordinary stirrer to obtain a milky white uniform liquid cleanser composition. (All pH adjusted to 8.5). The shape and average particle size of the used water-insoluble powder were measured by the following methods.

[Measurement of Particle Shape] Using a scanning electron microscope, take a projection of water-insoluble powder particles at a magnification of 1 to 3 cm, and trace one particle from the projection. The tracing paper on which the particles were copied and the particles were copied was measured for the weight (Ga). Also,
The minimum circumscribed circle of the particles was drawn on tracing paper, and the weight (Gb) of the circumscribed circle was measured in the same manner. From the measured values thus obtained, Wadel sphericity was calculated according to the following equation.

(Equation 1) In this way, the sphericity of ten particles was calculated, and those having an average value of 0.85 or more were regarded as spherical, and those having less than that were regarded as non-spherical.

[Measurement of average particle size] JIS M 8511
The specific surface area (S) was measured using a constant-pressure aeration-type specific surface area measuring apparatus described in (1976) Industrial analysis and test method of natural graphite, and the average particle size was calculated from the following equation.

(Equation 2)

With respect to the obtained liquid cleanser compositions of Examples 1 to 8 and Comparative Examples 1 and 2, the following test methods were used.
A detergency test, a rinsing test and a plastic surface condition test were performed. The results are shown in Tables 1 and 2 below.

[Detergency test] Place carbon black (approximately 0.4 g) on the surface of a white polypropylene sample plate (10 × 10 cm, same as below), rub it evenly with tissue paper, and spread 2 g on the prepared sample plate.
Was placed and rubbed by applying a constant load 60 times with a 5 × 5 cm sponge, and the degree of dirt removal was evaluated according to the following five-grade evaluation criteria. This is 3
Times, and the results were averaged. Evaluation criteria:-Same whiteness as before applying dirt (complete removal): 5 points-Slightly inferior to the same whiteness as before applying dirt: 4 points-Whiteness is the same whiteness as before applying dirt Between the state (5 points) and the state where no dirt is removed (1 point): 3 points ・ The whiteness is the same whiteness as before the dirt is attached (5 points) and no dirt is removed Slightly inferior to the middle of the state (1 point): 2 points-Dirt not removed at all (state not removed at all): 1 point

[Rinse test] Place 1 g of a sample on the upper end of a stainless steel plate having a surface of 20 × 10 cm and painted black.
After rubbing 10 times with a × 5 cm sponge, the stainless steel plate was leaned at an angle of 30 ° with the end on which the sample was placed facing up. Next, after rinsing with 200 ml of water from the upper end and drying the stainless steel plate, the remaining degree of the water-insoluble powder was evaluated according to the following three criteria. Evaluation criteria: ○: Almost no powder residue △: Powder residue slightly anxious ×: Powder residue anxious

[Plastic surface condition test] Sample 2 was placed on the surface (gloss level 55) of a white polypropylene sample plate.
g, and rubbed it with a 5 × 5 cm sponge by applying a constant load 60 times, and then measuring the glossiness of the surface with a glossmeter. This was performed three times, the results were averaged, and the average value was evaluated in relation to visual observation according to the following three-grade evaluation criteria. Evaluation criteria: ○: glossiness of 50 or more Δ: glossiness of 40 or more ×: glossiness of less than 40

[0032]

[Table 1]

[0033]

[Table 2]

(Consideration of Tables 1 and 2) As is clear from the results of Tables 1 and 2, Examples 1 to 8 which fall within the scope of the present invention are Comparative Examples 1 to 4 which fall outside the scope of the present invention. It was found that the detergency, the rinsing property, and the state of the plastic surface after cleaning were superior to those of Comparative Example 2.

[0035]

According to the present invention, there is provided a liquid cleanser composition which is free from scratches and has a good rinsing property while maintaining a detergency for stubborn dirt adhered to a hard surface and a soft material surface. Is done.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram for explaining a “sphere” defined in the present invention. FIG. 1 (a) shows a Wadel sphericity of 0.85.
The above are 0.98 and 0.88, and (b)
It is a figure which shows 0.72 and 0.44 when the sphericity of adel is less than 0.85.

Claims (2)

[Claims] 1. A liquid cleanser composition comprising a spherical water-insoluble powder. 2. A liquid cleanser composition comprising a water-insoluble powder having an average particle size of less than 1 μm.