JP3253664B2 - Alkaline hard surface cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to metal, plastic,
The present invention relates to an alkaline cleaning agent used for cleaning the surface of hard materials such as glass and composite materials thereof. More specifically, the present invention relates to an alkaline hard surface cleaner having a high detergency against oil stains and stably containing a nonionic surfactant.

[0002]

2. Description of the Related Art Conventionally, as an alkaline detergent, a mixture of an alkaline agent and a nonionic surfactant is used in order to avoid salting out action by a large amount of an alkaline agent (for example, Japanese Patent Publication No. 2-55799). No. 1), an alkali agent and a nonionic surfactant are blended using a solubilizing agent.
A liquefied product (for example, JP-A-1-301799) is known.

[0003]

However, the above-mentioned composition has poor workability because it must be mixed each time it is used, and the composition has a problem that the composition is insufficient in stability.

[0004]

Means for Solving the Problems The present inventors have intensively studied to solve these problems and to obtain an alkaline detergent having a detergency equal to or higher than the conventional one. As a result, a specific nonionic surfactant was used. By using the composition, a one-part composition containing an alkali agent and a surfactant stably can be obtained without using a solubilizer, and this composition has been found to have high detergency, and has reached the present invention. .

That is, the present invention provides an alkaline hard surface cleaner comprising an aqueous solution containing a polyglyceryl ether type nonionic surfactant of a dihydric alcohol (A) and an alkali agent (B); Characterized by comprising an aqueous solution containing (A) a product obtained by adding glycidol to glycidol or a product obtained by adding epichlorohydrin to a monohydric alcohol and then converting chlorine to a hydroxyl group, and an aqueous solution containing an alkali agent (B). It is. In the present invention, the polyglyceryl ether type nonionic surfactant (A) of a dihydric alcohol is a nonionic surfactant having a glyceryl skeleton.

As (A), a product obtained by adding glycidol to an alkylene oxide adduct of a monohydric alcohol or a dihydric alcohol (A1), a monohydric alcohol or a dihydric alcohol or a dihydric alcohol
Product obtained by adding epichlorohydrin to an alkylene oxide adduct of a polyhydric alcohol and then converting chlorine to a hydroxyl group (A
2) A product obtained by adding glycidol and an alkylene oxide to a dihydric alcohol or an alkylene oxide adduct thereof (A3); A product obtained by adding epichlorohydrin and an alkylene oxide to a dihydric alcohol or an alkylene oxide adduct thereof and then converting chlorine to a hydroxyl group. (A
4) A product obtained by further adding an alkylene oxide to those containing a dihydric alcohol among (A1) to (A4).
And the like. Among (A1) to (A5), preferred are (A1) and (A3) and those obtained by further adding an alkylene oxide to those containing a dihydric alcohol. That is, the type in which glycidol is added is more excellent in alkali solubility than the type in which chlorine is converted to a hydroxyl group after addition of epichlorohydrin, even at the same mole number of addition, and the production method is simpler.

The alcohols in each of (A1) to (A5) usually have 6 to 18 carbon atoms. Examples of the alcohols include monohydric alcohols [linear or branched saturated monohydric alcohols having usually 6 to 18 carbon atoms (n-octyl alcohol, n-decyl alcohol, n-dodecyl alcohol, n-tetradecyl alcohol, n-hexadecyl alcohol, n-octadecyl alcohol, 2-hexyldecanol, isostearyl alcohol, etc., a linear or branched unsaturated monohydric alcohol having 6 to 18 carbon atoms (oleyl alcohol, linoleyl alcohol, etc.), 2
And a hydric alcohol [alkanediols having usually 8 to 18 carbon atoms (1,2-decanediol, 1,2-dodecanediol, etc.)] and the like. Among these alcohols, those preferable in terms of solubility of (A) in alkali are straight-chain or branched-chain saturated monohydric alcohols having 6 to 18 carbon atoms and alkanediols having usually 8 to 18 carbon atoms. is there.

Examples of the alkylene oxide in each of (A1) to (A5) include ethylene oxide and propylene oxide, and two or more thereof may be used in combination.

In each of (A1) and (A3), the number of moles of glycidol added to the alkylene oxide adduct of alcohols or dihydric alcohols is usually from 1 to 1.
20 mol, preferably 1 to 10 mol, more preferably 2 mol
６6 mol. Generally, the adduct of glycidol is obtained as a mixture of different addition moles, but (A1)
In each of (A3) and (A3), a preferred range of the average number of moles of glycidol added is 3 to 6, particularly 3 to 5. (A
In 2) and (A4), the number of moles of epichlorohydrin added to the alkylene oxide adduct of alcohols or dihydric alcohols is usually 1 to 20 mol, preferably 1 to 10 mol, more preferably 2 to 6 mol. In each of (A1) to (A5), the total added mole number of the alkylene oxide is usually 0 to 20 mol, and a preferable range from the viewpoint of detergency is 0 to 10 mol, particularly 0 to 5 mol.

In the present invention, examples of the alkaline agent (b) include alkali metal hydroxides (such as caustic soda and causal), alkali metal salts of silicic acids (such as sodium orthosilicate and sodium metasilicate), and metal salts of phosphoric acids (such as sodium orthosilicate and sodium metasilicate). Sodium tripolyphosphate, sodium metaphosphate, etc.) and amines (ethylenediamine, alkanolamine, etc.).

The cleaning agent of the present invention can contain an antifoaming agent, if necessary. Any defoaming agent may be used as long as it is generally used for detergents, and examples thereof include polyalkylene glycol-based defoaming agents (for example, Caraline DF, manufactured by Sanyo Chemical Industries, Ltd.). If necessary, the detergent of the present invention may contain a chelating agent. Examples of the chelating agent include ethylenediaminetetraacetic acid, gluconic acid, polyacrylic acid, and the like, and salts thereof. Preferred among these are ethylenediaminetetraacetic acid and salts thereof. The cleaning agent of the present invention includes other anionic surfactants (for example, Sandet ALH manufactured by Sanyo Chemical Industry Co., Ltd.) and other nonionic surfactants (for example, Nonipol 10 manufactured by Sanyo Chemical Industry Co., Ltd.)
0] can be contained. The amount of each component constituting the cleaning agent of the present invention may be adjusted according to the purpose, but the weight ratio is usually as follows. The amount of the surfactant (A) is usually 0.01 to 30%, preferably 0.1 to 10%.
%, The amount of the alkaline agent (B) is usually 0.1 to 50%, preferably an amount such that the pH of the cleaning agent of the present invention becomes 10 or more. The balance is other optional components and water.

As an example of the method for producing the detergent of the present invention, the nonionic surfactant (A) and, if necessary, the above-mentioned optional components are charged into an aqueous solution of an alkaline agent (B) and mixed, whereby the present invention is prepared. A cleaning agent is obtained.

Hard surfaces suitable for cleaning with the cleaning agent of the present invention include surfaces of hard materials such as metals, plastics, glass, and composite materials thereof.

[0014]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. In the following description, parts and% represent parts by weight and% by weight, respectively. Based on the formulation shown in Table 1, the alkaline detergent of the present invention was obtained. Next, the appearance and detergency of the detergent composition were evaluated by the test methods described below. Table 1 shows the results.

-Testing Method for Appearance of Detergent- After mixing based on the formulation shown in Table 1 and stirring for 10 minutes,
Observe the appearance after standing for 1 hour. ：: No separation and precipitation ×: Separation and precipitation-Detergency test method-0.1 g of a mixture of 2 parts of carbon black and 100 parts of soybean oil was applied evenly to a mild steel plate (70 x 20 mm) with a brush. The sample baked at 175 to 180 ° C. for 1 hour was air-cooled to prepare a test piece with oil stains attached. The alkaline cleaning agent shown in Table 1 was diluted 10 times to prepare a cleaning solution.
After immersing the test piece in a cleaning solution at 30 ° C. for 30 seconds,
After washing with water for 10 seconds in still water, dry. Next, when the cellophane tape is adhered to the washed test piece and peeled off, the remaining dirt moves to the cellophane tape side. The cellophane tape is adhered to a blank sheet of paper, and the reflectance is measured with an AKA photoelectric tube colorimeter to determine the cleaning rate. Cleaning rate (%) = (RW-RS) / (RO-RS) × 100 RO: reflectance of original blank paper RS: reflectance of test piece before cleaning RW: reflectance of test piece after cleaning

[0016]

[Table 1] A: average 4-mol adduct of n-octyl alcohol crisitol B: average 4 mol adduct of n-todecyl alcohol crisitol E: average 4-mol adduct of 1,2-decanol alcohol citrate F: average of 2 mols of adduct of 1,2-tetracycloethylene oxide 2 Glycitol average of 4 mol adduct of molar adduct G: alkyl phenyl ether sulfonic acid sorter H: nonylphenol ethylene oxide averaging 9 mol adduct

[0017]

The cleaning agent of the present invention has the following effects. (1) Good stability. The conventional one-part alkaline detergent has a problem in stability. (2) Workability is good. The conventional two-part alkaline cleaning agent required this trouble of mixing at the time of use. (3) High detergency against oil stains. Due to the above effects, the cleaning agent of the present invention is useful as an alkaline hard surface cleaning agent.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI C11D 7:14 C11D 7:14 7:36 7:36 7:32) 7:32) (58) Fields surveyed (Int.Cl. . ^7, DB name) C11D 10/02 C23G 1/14 C11D 10/02 C11D 1/72 C11D 7/06 C11D 7/14 C11D 7/36 C11D 7/32

Claims (5)

(57) [Claims] 1. An alkaline hard surface cleaner comprising an aqueous solution containing a polyglyceryl ether type nonionic surfactant of a dihydric alcohol (A) and an alkali agent (B). (2) a compound obtained by adding glycidol to an alkanediol having 8 to 18 carbon atoms or an alkylene oxide adduct thereof, or adding glycidol and an alkylene oxide, or further adding an alkylene oxide thereto; The cleaning agent according to claim 1, which is: 3. The average addition mole number of glycidol to the alkanediol or its alkylene oxide adduct is 3 to 6, and the total addition mole number of the alkylene oxide in (A) is 0 to 10 moles. Item 6. The cleaning agent according to item 2 or 3. 4. An aqueous solution containing a product obtained by adding glycidol to a monohydric alcohol or a product obtained by adding epichlorohydrin to a monohydric alcohol and then converting chlorine to a hydroxyl group (A) and an alkali agent (B). Characteristic alkaline hard surface cleaner. 5. The composition according to claim 1, further comprising at least one member selected from the group consisting of a chelating agent, an antifoaming agent, an anionic surfactant and a nonionic surfactant [excluding (A)].
The cleaning agent according to any one of the above.