JP3167635B2 - High concentration solid neutral detergent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-concentration solid neutral detergent suitable as a commercial dishwashing detergent.

[0002]

2. Description of the Related Art Conventionally, commercial dishwashing detergents used in kitchens such as schools, hospitals, employee cafeterias, etc. are mostly in the form of liquids, and the surfactant component concentration is as follows.
The mainstream is about 15 to 20% by weight (hereinafter abbreviated as "%").
From the viewpoint of simplicity of replacement and the like, surfactants having a surfactant component concentration increased to about 50 to 60% are on the market.

[0003]

However, even in such a highly concentrated type, since it is still liquid, the exchange unit is heavy, the exchange operation is not easy, and the stock product is stored. Does not solve the problem of requiring a large amount of space. In addition, since a thick polyethylene container generally used for accommodating a detergent is flame-retardant and hardly decomposable, disposal of the container becomes a problem. In addition, high-concentration detergents often use organic solvents such as ethanol and propylene glycol together with water to reduce viscosity and make handling easier, but these solvents are easily flammable and leaked detergents. There is also a problem that a fire may be caused to cause a disaster. In addition, those containing the above organic solvent have a problem that the product itself has a solvent odor or a solvent odor is accompanied when a diluted and dissolved cleaning solution is used. Thus, in some cases, a fragrance is used to mask the odor of the organic solvent. However, some consumers do not like the odor of the fragrance, and also have the disadvantage that the raw material cost is high.

In order to solve these problems, it has been proposed to solidify the detergent. For example, JP
Japanese Patent Application Laid-Open No. 1-120900 discloses a solid rinse agent containing water, urea and a predetermined surfactant.
JP-A-308498 discloses a transparent solid detergent obtained by heating and melting a detergent composition containing a predetermined fatty acid diethanolamide, followed by molding, cooling and solidification. However, all of these detergents contain a predetermined amount of water, which increases their weight and bulk, and thus has a problem that handling is not easy. In addition, since water is contained, there is also a problem that the solid detergent tends to deteriorate with time due to water.

[0005] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a high-concentration solid neutral detergent which is completely free from water and organic solvents and is excellent in safety and stability. Things.

[Means for Solving the Problems]

[0006] In order to achieve the above object, the invention according to claim 1 of the present invention provides a surfactant component comprising the following components (a) to (c) as essential components:
It is a high-concentration solid neutral detergent which is contained at a concentration of 0.1% and contains no organic solvent and water. (A) Sulfonic acid having a linear alkyl group having an average number of carbon atoms of 8 to 16 contained in 30 to 70% of the whole and a general formula

Embedded image wherein, m = 0~2, n = 1~3 , m + n = 3 ] _{H m N (CH 2 CH 2} OH) n sulfonic acid ethanolamine salt obtained by ethanolamine and represented by An anionic surfactant comprising: (B) a general formula containing 5 to 55% of the whole

Embedded image _{R-O (CH 2 CH 2} O) n H [wherein, R mean a linear or branched alkyl group having 8 to 16 carbon atoms, n = 2 to 18] Poly represented by Nonionic surfactant comprising oxyethylene alkyl ether. (C) A general formula containing 15 to 50% of the whole.

Embedded image _{R-CONH-CH 2 CH 2} OH [wherein, R is an average alkyl or alkenyl group having 8 to 18 carbon atoms] nonionic surfactants consisting of fatty acid monoethanolamide, represented by.

[0007] The invention according to claim 2 of the present invention provides:
In the invention according to claim 1, the gist is that the solidifying agent is contained in a ratio of 20% or less based on the whole.

Further, according to a third aspect of the present invention, in the second aspect, the solidifying agent is selected from the group consisting of polyethylene glycol having an average molecular weight of 3,000 to 6,000, polyvinyl alcohol, polyvinylpyrrolidone and soap. In addition, the gist is that the substance is at least one substance.

[0009]

Next, an embodiment of the present invention will be described.

The anionic surfactant (a) used in the present invention is blended in order to secure the detergency according to the purpose, and is a sulfone having a linear alkyl group having an average of 8 to 16 carbon atoms. Acids and general formula

Embedded image wherein, m = 0~2, n = 1~3 , m + n = 3 ] _{H m N (CH 2 CH 2} OH) n sulfonic acid ethanolamine salt obtained by ethanolamine and represented by An anionic surfactant consisting of

The sulfonic acid is preferably a straight-chain alkylbenzene sulfonic acid, and the ethanolamine includes monoethanolamine, diethanolamine, triethanolamine and the like. The sulfonic acid ethanolamine salt may be used alone or in combination of two or more.

In some cases, a part or all of the above-mentioned ethanolamine sulfonate may be replaced with a sulfone other than an ethanolamine salt, such as sodium linear alkylbenzene sulfonate (LAS-Na) or sodium alkane sulfonate (SAS). Can be replaced by acid salts.

The compounding ratio of the anionic surfactant (a) must be set to 30 to 70% of the whole. That is, if it exceeds 70%, the detergent becomes a paste and a solid detergent cannot be obtained. Conversely, if it is less than 30%, the expected cleaning properties cannot be obtained. In addition, it is preferable to set to 50 to 60% among the above mixing ratios.

Further, the nonionic surfactant (b) used in the present invention can be used for diluting a solid detergent obtained by blending the same without diminishing the detergency extremely. Prepared so that the solution viscosity is in the low range, it is used to facilitate handling, the general formula

Embedded image _{R-O (CH 2 CH 2} O) n H [wherein, R mean a linear or branched alkyl group having 8 to 16 carbon atoms, n = 2 to 18] Poly represented by Oxyethylene alkyl ether is used.

The mixing ratio of the nonionic surfactant (b) must be set to 5 to 55% of the whole.
That is, if it exceeds 55%, the balance with other surfactant components is deteriorated, and the detergency decreases. On the other hand, if it is less than 5%, the lipophilicity becomes high and it becomes difficult to dissolve in water, and a certain level of detergency is obtained. This is because it becomes difficult to secure the property. In addition, it is preferable to set to 20 to 40% among the above mixing ratios.

Further, the nonionic surfactant (c) used in the present invention is known to have an effect of improving the detergency and emulsifying power for oil and fat stains.
Serves to eventually solidify the composition. The nonionic surfactant (c) has a general formula

Embedded image A fatty acid monoethanolamide represented by R-CONH—CH ₂ CH ₂ OH [where R is an alkyl group or an alkenyl group having an average of 8 to 18 carbon atoms] is used.

The mixing ratio of the nonionic surfactant (c) must be set to 15 to 50%. That is, if it exceeds 50%, the balance with other surfactant components is deteriorated, the detergency is reduced, and the practicality is poor.
Conversely, if it is less than 15%, a solid detergent cannot be obtained. In addition, it is preferable to set to 20 to 40% among the above mixing ratios.

The high-concentration solid neutral detergent of the present invention contains the above-mentioned three types of surfactant components as essential components. In addition to these, other known surfactant components and the like can be appropriately contained. . However, the concentration of the entire surfactant component including the above three types of surfactant components in the composition must be set to 80% or more. That is, if the surfactant component is less than 80%, the effect associated with the concentration of the detergent, such as the compactness of the detergent, is poor.

Further, the high-concentration solid neutral detergent of the present invention includes:
For the purpose of making the obtained detergent more robust, a solidifying agent can be contained at a ratio of 20% or less. Examples of such a solidifying agent include polyethylene glycol (PEG), polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), and soap. Among them, PEG having an average molecular weight of 3,000 to 6,000 is preferable. . The content of these solidifying agents is preferably set to 5 to 15%.

It is important that the high-concentration solid neutral detergent of the present invention does not contain any water. That is, conventional detergents contain some water in solid detergents as well as liquid detergents, but in the present invention,
By not using water at all, increase in weight and bulk derived from water is suppressed, and long-term quality stability is ensured.

It is also important that no organic solvents such as ethanol and propylene glycol, which have been widely used in the past, are contained. That is, these organic solvents have been conventionally used as viscosity modifiers, but in the present invention, by not using these organic solvents at all, the solvent odor and the ignition of the solvent, which have been a problem in the past, have been problematic. The danger associated with ease of use has been avoided, and the safety has been improved.

The high-concentration solid neutral detergent of the present invention can be easily obtained by heating and melting each of the above-mentioned component materials, mixing them uniformly, leaving them to stand for a predetermined time, and solidifying them by cooling. The heated and melted mixture can be solidified in a predetermined mold to be formed into a lump having a usage amount of one unit. Further, in order to be able to easily divide a lump for a single use, the lump may be formed into a plate-like material (a shape like a commercially available solid curry) having a lattice-like groove extending vertically and horizontally. Furthermore, granules, needles, and pellets can be obtained by a known method using a solidified mass of an appropriate size or a melt that has not been solidified as it is.

Therefore, for example, when it is used by dissolving it in a solution by directly shaking it into a washing tank or the like, use a granular or needle-like material. It is preferable to use the one-time amount formed into one lump (tablet shape).
Of course, plate-like objects having a shape like the solid curry may be inserted one by one. Furthermore, in large kitchens, multiple sinks (sinks)
In the case where the cleaning liquid is simultaneously supplied from the supply devices at several places, a large lump of about 1 kg may be prepared, dissolved in a predetermined supply device, and the cleaning liquid may be transported and distributed to each sink.

As described above, in the present invention, “solid” refers to a block, plate, granule, needle, pellet, etc.
The purpose is to include various forms.

The high-concentration solid neutral detergent of the present invention thus obtained has a high concentration of a surfactant component of 80% or more and is solid. Easy handling during storage and use. Also, unlike the case of liquid, there is no leakage from the packaging material, no dripping, etc., and it is sanitary. And even if spilled, it is easy to collect. As the solid form, an appropriate form such as a lump or a granule can be selected according to the application, so that the usability is good. Furthermore, since water is not contained in the detergent, decay due to water does not occur, and the quality is stable for a long time. Further, since it does not contain a low boiling organic solvent, it is safe without solvent odor. Incidentally, the flash point of the high-concentration solid neutral detergent of the present invention depends to some extent on its composition, but is usually 200 ° C. or higher. Also, the heat of combustion is less than 8000 cal / g,
In the classification of dangerous goods based on the Fire Service Law, it has been confirmed that they are "non-dangerous goods".

[0026]

As described above, the high-concentration solid neutral detergent of the present invention contains a surfactant component containing three special surfactants as essential components at a high concentration of 80% or more. ,
Moreover, since it is solid, it is more compact than conventional ones, and has good handleability. Also, unlike liquids,
Sanitary and easy to recover if spilled. Since an appropriate form such as a lump or a granule can be selected according to the application, the usability is good. In addition, because it does not contain water,
There is no spoilage due to water, and the quality is stable for a long time. Further, since it does not contain a low boiling organic solvent, it is safe without solvent odor.

Next, examples will be described together with comparative examples.

[0028]

Examples 1 to 12 and Comparative Examples 1 to 6 High-concentration solid neutral detergent compositions having the compositions (weight basis, the same applies hereinafter) shown in Tables 1 to 4 below were prepared and melted at 80 to 90 ° C. The resulting mixture was allowed to stand naturally for one day and night to obtain the desired high-concentration solid neutral detergent (lumpy). In Example 12, the type of the anionic surfactant (component a) was changed.

Each detergent was evaluated in terms of appearance (degree of solidification), solubility, foaming power and detergency as follows. The results are shown in Tables 1 to 4 below.

(1) Appearance (degree of solidification) [Test method] Evaluation was made by visual observation and tactile sensation at the fingertip. [Evaluation criteria] ◎: Solid ○: Separated, upper layer is liquid, lower layer is solid △: Paste ×: Liquid

(2) Solubility [Test Method] Tap water at 20, 40, 60 ° C. (total hardness 8)
One liter of a sample (detergent) was added to 1 liter (0 mg / liter), and the amount dissolved after stirring uniformly for 10 minutes with a glass rod was evaluated by visual observation. [Evaluation Criteria] 完全: Easily and completely dissolved ８０: Dissolves 80% or more △: Dissolves about 80-50% ×: Dissolves about 50-20% XX: Dissolves 20% or less

(3) Foaming power [Test method] JIS K3362 (Rosmiles method)
Tested according to The foaming power of the sample measured under the conditions of a measurement temperature of 40 ± 1 ° C. and a detergent concentration of 0.04% was evaluated based on the foaming power of the JIS detergency-determining index detergent. [Evaluation Criteria] ：: Excellent ○: Equivalent △: Slightly poor ×: Poor

(4) Detergency test [Test method] The test was carried out according to JIS K3362 (improved leanut method). The cleaning power of the sample measured under the conditions of a measurement temperature of 30 ± 1 ° C. and an active ingredient detergent concentration of 0.04% was compared with the cleaning power (detergent concentration of 1.5%) of the JIS detergency indicator detergent. evaluated. [Evaluation Criteria] ：: Notably excellent ○: Somewhat excellent △: Equal ×: Somewhat poor XX: Poor

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

[0037]

[Table 4]

From the above results, it can be seen that all of the examples were solid detergents having practical properties such as solubility and detergency. On the other hand, it can be seen that the comparative example does not have a solid form or has a problem in practical characteristics such as detergency. In addition, in the evaluation of the solubility, in the evaluation of solubility, only the one that does not dissolve in water but dissolves at 40 ° C. or 60 ° C., but a recent cleaning liquid supply device dissolves the detergent in hot water and supplies it. Since there are many such substances, there is no practical problem with the above solubility.

[0039]

Examples 13 to 17 As shown in Table 5 below, the type of the nonionic surfactant (component (b)) composed of polyoxyethylene alkyl ether was changed. Otherwise in the same manner as in Example 2, an intended high-concentration solid neutral detergent (lumpy) was obtained. Then, these examples were evaluated in the same manner as described above. The results are shown in Table 5 below.

[0040]

[Table 5]

From the above results, it can be seen that when the nonionic surfactant (component b) composed of polyoxyethylene alkyl ether is used, the difference in the effect due to the number of added EO and the difference in the effect due to the alcohol composition is hardly recognized. Understand.

[0042]

Examples 18 to 25 As shown in Tables 6 and 7 below,
The type of nonionic surfactant (component c) composed of aliphatic monoethanolamide was changed. Otherwise, the above-mentioned Example 2
In the same manner as above, the desired high-concentration solid neutral detergent (lump)
I got Then, these examples were evaluated in the same manner as described above. The results are shown in Tables 6 and 7 below.

[0043]

[Table 6]

[0044]

[Table 7]

From the above results, it can be seen that when a nonionic surfactant (component c) composed of aliphatic monoethanolamide is used, there is almost no difference in the effect depending on the type of aliphatic.

[0046]

Examples 26 and 27 As shown in Table 8 below, by mixing polyethylene glycol (PEG) as a solidifying agent together with a surfactant component, an intended high-concentration solid neutral detergent (lumpy) was obtained. Was. These examples were evaluated in the same manner as described above, and the effect of the solidifying agent to stabilize the solid state was evaluated. That is, the sample (detergent) was evaluated whether the solid state was maintained not only at room temperature but also at high temperature. Rating is 37
This was carried out by observing the appearance of the device at a temperature of 45 ° C., 45 ° C., 50 ° C., 55 ° C., and 60 ° C. in a state of being left overnight. In addition, the same evaluation was performed also about the example product (2, 4) which does not mix | blend a solidifying agent with the composition of a surfactant component as a control example. The evaluation criteria are the same as the above-mentioned appearance evaluation. The results are shown in Table 8 below.

[0047]

[Table 8]

From the above results, it can be seen that when the solidifying agent (PEG) is blended, the solid state of the high-concentration solid neutral detergent can be more stably maintained.

[0049]

Examples 28 to 35 As shown in the following Tables 9 and 10, the desired high-concentration solid neutral detergent (lumpy) was obtained by blending various solidifying agents with the surfactant component. . These examples were evaluated in the same manner as described above. The results are shown in Tables 9 and 10 below.

[0050]

[Table 9]

[0051]

[Table 10]

From the above results, it can be seen that all of the examples containing the solidifying agent are solid detergents having practical properties such as solubility and detergency.

[0053]

Comparative Examples 7 to 13 As shown in Tables 11 and 12, various ethanolamides were used in place of the fatty acid monoethanolamide as the component c. However, in order to uniformly mix them, a solvent (for example, ethanol or the like) was required, and all of those obtained by uniformly mixing were liquids.

[0054]

[Table 11]

[0055]

[Table 12]

The above results show that the ethanolamide used in the present invention must be a fatty acid monoethanolamide.

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C11D 1/00-1/94 C11D 17/00

Claims (3)

(57) [Claims] 1. A surfactant component comprising the following components (a) to (c) as essential components: 80 to 100% by weight based on the whole
A high-concentration solid neutral detergent characterized by containing no organic solvent and water. (A) Sulfonic acid having a linear alkyl group having an average of 8 to 16 carbon atoms and containing 30 to 70% by weight based on the whole, and a general formula: H _m N (CH ₂ CH ₂ OH) _n [ Wherein m = 0-2, n = 1-3, m + n = 3], an anionic surfactant comprising a sulfonate ethanolamine salt obtained with ethanolamine. (B) 5 to 55% by weight based on the general formula: R--O (CH ₂ CH ₂ O) _n H wherein R is a straight chain having an average carbon number of 8 to 16 or A nonionic surfactant comprising a polyoxyethylene alkyl ether represented by a branched alkyl group, n = 2 to 18]. (C) R-CONH-CH ₂ CH ₂ OH wherein R is an alkyl group or alkenyl group having an average of 8 to 18 carbon atoms, which is contained in an amount of 15 to 50% by weight based on the whole. A nonionic surfactant comprising the fatty acid monoethanolamide represented. 2. The high-concentration solid neutral detergent according to claim 1, wherein the solidifying agent is contained in a proportion of not more than 20% by weight based on the whole. 3. The method according to claim 1, wherein the solidifying agent has an average molecular weight of 3,000 to 6,000.
3. The high-concentration solid neutral detergent according to claim 2, which is at least one substance selected from the group consisting of polyethylene glycol, polyvinyl alcohol, polyvinyl pyrrolidone and soap.