JPH0734090A - Water based detergent composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition useful for removing oil and fine particles adhered to a surface of a glass, a metal, etc., consisting of a specific nonionic surfactant, a specific alkali builder and water, being safe for human and having the same high cleaning ability as usual. CONSTITUTION:This detergent composition consists of (A) 0.1-20Wt.% nonionic surfactant made by adding 5-12 mole ethylene oxide to a straight chain secondary alcohol, (B) 0.1-10wt.% alkali builder comprising a compound of the formula (R1-R4 are a 1-4C hydroxyalkyl, etc.), (e.g. tetrahydroxypropyl ethtlenediamine, etc.) and the residue with water. Here, a perfume, a hydrotropic agent such as ethanol, ethylene glycol or a fatty acid salt, etc., can be added to the composition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent, and more particularly to an aqueous detergent composition for removing oil and fine powder adhering to the surfaces of glass, metal and ceramics.

[0002]

2. Description of the Related Art An aqueous detergent is generally composed of a mixed composition of a surfactant and an alkali additive called an alkali builder. Among them, as a detergent having high detergency and good defoaming property, a detergent composition using a nonionic surfactant as a surfactant and an amino alcohol as an alkali builder is disclosed in JP-A-3-126798.
It is described in Japanese Patent Publication No. This conventional detergent composition,
While a nonionic surfactant is used as the surfactant, an amino alcohol having the structure shown in Chemical formula 2 is used as the alkali builder, and the pH of the 0.2 wt% aqueous solution is
Is 8 to 9.5.

[0003]

[Chemical 2]

In the chemical formula 2, R5 has 1 to 4 carbon atoms.
R6 and R7 are each a hydrogen atom or a hydroxyalkyl group having 1 to 4 carbon atoms.

[0005]

However, the above-mentioned conventional cleaning composition has the following safety characteristics for human body due to its composition:
It was not possible to combine the two points of high detergency. That is, it has been confirmed that the nonionic surfactant is highly safe for the human body, and the safety for the human body strongly depends on the safety of the alkali builder. Here, the alkali builder having the above chemical formula can be classified into primary to tertiary amines by the alkyl groups of R5, R6 and R7. Of these, primary amines have a higher pH in aqueous solution than other amines and are highly effective as builders for detergents, but on the other hand, there are concerns about the effects on the human body from oral and transdermal routes, and they are similar to ammonia. It emits an unpleasant odor, which causes a problem in the working environment. The secondary amine forms a carcinogenic nitrosamine by the reaction with nitrous acid in the air, and has the same safety problem as the primary amine. The most safe tertiary amine has a lower pH than the primary and secondary amines, and the effectiveness of the detergent as a builder is reduced.

Incidentally, the oral toxicity LD _{50 in} rats as safety data is 2.14 g / kg for the primary amine, monoethanolamine, 1.82 g / kg for the secondary amine, diethanolamine and tertiary amine. One triethanolamine amounts to 8.68 g / kg. Therefore, diethanolamine and triethanolamine meet the criteria for cosmetic raw materials, but monoethanolamine does not.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a water-based detergent composition which ensures safety for a human body and has a conventional detergency.

[0008]

Means and Actions for Solving the Problems The aqueous detergent composition of the present invention comprises a nonionic interface composed of a linear secondary alcohol to which 5 to 12 mol of ethylene oxide or 5 to 15 mol of propylene oxide is added. Activator 0.1-20 wt%
And an alkali builder 0.1 represented by the chemical formula
10 wt% and the balance is water.

[0009]

[Chemical 3]

In the above chemical formula, R1 to R4 have 1 carbon atom.
~ 4 hydroxyalkyl groups. The nonionic surfactant in the above-mentioned constitution has its own detergency, rinsing property,
It is excellent in all aspects such as biodegradability and safety for the human body, and in order to bring out its performance, it is necessary to make the compounding amount 0.1 to 20 wt% with respect to the total composition of the water-based detergent composition. . If the blending amount is less than 0.1 wt%, the oil content of the cleaning agent is small, so the life is short, and if the blending amount is 20 wt% or more, the viscosity rapidly increases, and the detergency of the cleaning agent decreases due to insufficient physical force transmission. The problem of reduced rinsing property occurs.

Further, the alkali builder in the above chemical formula raises the pH so that the entire detergent becomes alkaline,
It has the effect of saponifying and decomposing oil and fat stains, neutralizing the charge on the surface of the fine powder by its charge, and facilitating dispersion. In addition, since this component does not react with nitrous acid in the air, it does not produce carcinogenic nitrosamines, is safe for the human body, has good biodegradability and is safe for the environment. Moreover, it does not emit an unpleasant odor similar to ammonia. The rat oral toxicity LD ₅₀ of this alkaline builder is about twice that of primary and secondary amines. In order to bring out the performance of this component for cleaning, it is necessary to make the compounding amount 0.1 to 10 wt% with respect to the total composition of the aqueous cleaning composition. If the blending amount is 0.1 wt% or less, the detergency is insufficient, and 10
If it is more than wt%, the rinsing property becomes insufficient.

The water-based detergent composition of the present invention comprises the above-mentioned nonionic surfactant and alkali builder as essential components, but various other components, if desired, are conventionally used in this type of composition. It is also possible to add auxiliary components of. Such auxiliary ingredients include, for example, fragrances,
A dye or the like can be added, and a general hydrotrope such as ethanol, ethylene glycol, propylene glycol, or a fatty acid salt such as citrate can be added.

[0013]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to these. Polyoxyethylene secondary alkyl ether (ethylene oxide 7 mol adduct) 5 wt% as a nonionic surfactant,
Example 1 of the present invention is an aqueous detergent composition comprising 1 wt% of tetrahydroxypropylethylenediamine represented by the chemical formula of Chemical Formula 4 as an alkali builder and the balance being water. Pure water having a resistance value of 2 MΩ or more was used as water.

[0014]

[Chemical 4]

R1 to R4 in the above chemical formula are all isopropyl alcohol groups. The thus obtained aqueous cleaning composition had a pH of 10.8, was colorless and transparent, and had no ammonia odor at all.

Safety Evaluation The polyoxyethylene secondary alkyl ether (ethylene oxide 7 mol adduct) used as the nonionic surfactant in this example has good biodegradability and is safe for the human body. It has been confirmed that tetrahydroxypropylethylenediamine used as an alkali builder has good biodegradability, has an oral toxicity LD _{50 in} rats of 3.9 g / kg, and does not produce carcinogenic nitroamine. This is the first compared to the oral toxicity LD ₅₀ of the alkaline builder in rats, which is used in conventional detergents.
Almost twice as much as amines and secondary amines, and has the advantage of not being carcinogenic.

Evaluation of Detergency In order to confirm the detergency of the water-based cleaning composition of this example, the cutting oil adhering to the metal surface was washed. As a comparative example, only the alcal builder of the present example was treated with monoethanolamine (Comparative Example 1), diethanolamine (Comparative Example 2),
It was washed with a detergent replaced with triethanolamine (Comparative Example 3).

The cleaning conditions are 100 cm × 100 cm × 2c
The copper plate of m was used as a cleaning member, cutting oil for metal was attached to this cleaning member, and the cleaning process shown in Table 1 was performed.

[0019]

[Table 1]

Evaluation The change in weight after washing with carbon tetrachloride for 5 minutes was measured and evaluated visually. In the weight measurement, the remaining amount of less than 1 mg was designated as "O", and the remaining amount was designated as "X". In the visual evaluation, a change in color due to the removal of cutting oil was confirmed before and after cleaning with carbon tetrachloride, and no change was indicated by "○", and change was indicated by "x".
Table 2 shows the detergency and the effect on the human body.

[0021]

[Table 2]

It can be seen from Table 2 that the cleaning agent of this embodiment has two points that, unlike the conventional cleaning agent, there is no problem in the evaluation of the cleaning power by visual evaluation and weight evaluation, and there is no problem in the influence on the human body. I understand.

Further, by utilizing the cloud point of the ethylene oxide adduct of the linear secondary alcohol of the nonionic surfactant used in the aqueous detergent composition of this example, heating above the cloud point. The oil-water separation was carried out by the method, and the effect that it became possible to improve the wastewater treatment property by separating into a two-component system of a surfactant component and a lipophilic component and a hydrophilic component was also obtained. Further, since the cleaning agent of this embodiment has a liquid property, it does not need to be diluted or dissolved and can be used as it is, unlike the case of powder, and is easily used as a cleaning agent.

Table 3 shows each example of the water-based detergent composition using the nonionic surfactant and the alkali builder other than those used in Example 1. In these examples, the same detergent as in Example 1 and The effect on safety has been confirmed.

[0025]

[Table 3]

[0026]

INDUSTRIAL APPLICABILITY As described above, the water-based detergent composition of the present invention secures safety for the human body, does not particularly generate a bad odor or a carcinogen, and combines the high detergent power of conventional detergents. be able to.

Claims (3)

[Claims] 1. A nonionic surfactant 0.1 to 2 in which 5 to 12 mol of ethylene oxide is added to a linear secondary alcohol.
0 wt% and 0.1 to 0.1 of the alkali builder represented by
A water-based detergent composition comprising 10 wt% and the balance being water. [Chemical 1] 2. A nonionic surfactant obtained by adding 5 to 15 mol of propylene oxide to a linear secondary alcohol.
20% by weight, 0.1 to 10% by weight of the alkali builder described in claim 1, and the balance water. 3. A nonionic surfactant obtained by adding 5 to 12 mol of ethylene oxide to a linear secondary alcohol and a nonionic surfactant obtained by adding 5 to 15 mol of propylene oxide to a linear secondary alcohol. 0.1-20 wt.
%, And the alkali builder 0.1 to 1 according to claim 1.
An aqueous cleaning composition comprising 0 wt% and the balance being water.