JP2001003099A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent composition which is excellent in removing organic and inorganic stains and bas been improved in terms of environmental pollution and safety by compounding a specified amount of a nonionic surfactant, a specified amount of an aliphatic carboxylic acid having a specified number of carbon atoms, an alkaline compound, and water. SOLUTION: A nonionic surfactant represented by the formula in an amount of 1-20 wt.% and a 6-12C aliphatic carboxylic acid in an amount of 1-20 wt.% are used. In the formula, the number of carbon atoms of R is 8; n is 2 or 3; and p is 1-15. Examples of the aliphatic carboxylic acid are heptanoic, octanoic, 2-ethyloctanoic, nonanoic, 3,5,5-trimethylhexanoic, and dodecanoic acids. Inorganic alkaline compounds (e.g. potassium hydroxide, sodium hydroxide, and sodium metasilcate) and organic alkaline compounds (e.g. triethanolamine and morpholine) are listed as the alkaline compound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fingerprints, oils and fats, machine oils, cutting oils, chips, greases, and the like, which are present on the surface of an object to be cleaned such as precision parts, machine parts, automobile parts or jigs and tools.
The present invention relates to a cleaning agent excellent in removing contaminants such as wax, liquid crystal, abrasive slurry liquid, and rosin flux.

[0002]

2. Description of the Related Art Conventionally, for removing organic stains such as fingerprints, machine oils, greases, waxes and the like adhered to the surface of precision parts, machine parts, automobile parts, jigs and tools, various organic solvents, alkalis, and the like. It was washed and removed with an aqueous solution containing a surfactant and the like.

[0003]

As organic solvents, chlorofluorocarbon-based and chlorine-based solvents such as chlorofluorocarbon 113, trichloroethylene, 1,1,1-trichloroethane, and methylene chloride are widely used. Although it has excellent permeability and the like, it has significant problems in safety, toxicity, environmental pollution and the like. In addition, water-soluble detergents containing alkalis, surfactants, etc. are inadequate in terms of degreasing power, and contain environmental hormone problems and endocrine disrupting substances, which have recently become problems, and are satisfactory in degreasing performance and environmental aspects. What is done has not been obtained.

An object of the present invention is to provide a cleaning agent which solves the above-mentioned conventional problems, is excellent in removing organic and inorganic stains, and improves environmental pollution and safety.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above problems can be solved by using a specific nonionic surfactant, and have completed the present invention. That is, the present invention provides at least (A) a nonionic activator represented by the following general formula from 1 to 20.
weight%

Embedded image (Wherein, the C number of R is 8, n is 2 or 3, and P is an integer of 1 to 15.) (B) 1 to 20% by weight of an aliphatic carboxylic acid having 6 to 12 carbon atoms; It is intended to provide a detergent comprising the compound (D) water.

In the present invention, the amount of the surfactant (A) is from 1 to 20% by weight, preferably from 1 to 10% by weight, more preferably from 2 to 5% by weight. If this amount is less than 1% by weight, the washing property is reduced, and
If it is larger, a stable liquid state cannot be maintained, which is not preferable.
The surfactant (A) is used alone or in combination of two or more.

The aliphatic carboxylic acid of the component (B) is an essential component for keeping the detergent of the present invention in a stable liquid state in a wide temperature range from 0 ° C. or lower to 50 ° C. or higher,
Specific examples include heptanoic acid, octylic acid, 2-ethyloctylic acid, nonanoic acid, 3,5,5-trimethylhexanoic acid, dodecanoic acid, and the like. When the number of carbon atoms is less than 6, an unpleasant odor becomes strong, and when the number is more than 12, foaming becomes large, which is not preferable. If the amount is less than 1% by weight, it is difficult to maintain a stable liquid state,
If the amount is more than 0% by weight, the degreasing power is undesirably reduced.

[0008] The alkaline compound of the component (C) is
It is a component necessary for solubilizing the component in water, and examples thereof include inorganic alkaline compounds such as potassium hydroxide, sodium hydroxide, and sodium metasilicate, and organic alkaline compounds such as triethanolamine and morpholine.

The component (D) water is used as a solvent for making the surfactant (A) and the aliphatic carboxylic acid (B) detergent active ingredient a uniform liquid product. The amount thereof is determined so that the total amount of water and the equivalent amount of the above-mentioned cleaning agent active ingredient and known additives will be 100% by weight.

When the cleaning agent of the present invention is used in an actual cleaning step, it is further diluted with water before use. The dilution concentration at that time is usually 1 to 10% by weight. This dilution concentration is appropriately adjusted depending on conditions such as a cleaning method, a cleaning part, and a stain.

In the present invention, other known additives, for example, nonionic activators such as polyoxyethylene alkyl ether and polyoxyethylene polyoxypropylene ether, anionic activators, carbonates, silicates, and boric acid Salts, phosphates, salts such as sodium hydroxide and potassium hydroxide, sodium tripolyphosphate, gluconate, ED
A chelating agent such as TA and NTA, a corrosion inhibitor such as benzotriazole, amines, alkanolamines, and nitrite, an antifoaming agent, and a solvent such as alcohol, glycol, and glycol ether can be appropriately blended and used. .

The cleaning agent of the present invention exhibits good cleaning properties for cleaning precision parts, machine parts, automobile parts, and jigs and tools used in an assembly processing step. In the present invention, the precision parts refer to, for example, electronic parts, electric parts, precision machine parts, resin processed parts, optical parts and the like. Specifically, examples of the electronic component include a printed wiring board, an IC lead frame, a capacitor, a liquid crystal display, a hard disk substrate, and a semiconductor material. Examples of the electric component include components for a coater and the like.
Electric motor parts such as magnets, brushes, and housings, and precision machine parts include bearings, sewing machine parts, processing parts, and the like. Further, the resin processed parts include precision resin processed parts used in cameras, automobiles, and the like, and the optical parts include lenses used in cameras, glasses, optical devices, and the like.

[0013] The mechanical parts include bearings, gears, various mechanical parts, and the like, and the automotive parts include engine parts, transmission gears, carburetors, and the like.
The jigs and tools used in the assembling process are mainly metal parts of the jigs and tools, tools and the like handled in various processes such as manufacturing, assembling, and finishing the precision parts. .

The cleaning composition of the present invention can be used in various cleaning methods such as an immersion method, an oscillating method, an ultrasonic cleaning method and a hand wiping method, and good results can be obtained. Hereinafter, the present invention will be described with reference to examples.

[0015]

EXAMPLES Examples 1 to 4 and Comparative Examples 1 and 2 are shown in Table 1.
The following tests were conducted by mixing the cleaning agents shown in Table 1 below. Table 2 shows the results.

(1) Degreasing Force Test A cold-rolled steel plate (60 × 80 × 1.2 mm) is ground on an abrasive paper (#
Polish with 320) and degrease with acetone and ethyl ether. The test piece is completely immersed in a water-insoluble cutting fluid (JIS Class 2 No. 4) and suspended vertically all day and night to remove oil. Each test piece was immersed in 3% by weight of the detergent composition, washed at 50 ± 1 ° C. for 3 minutes while applying ultrasonic waves, and then the test piece washed with the detergent composition was rinsed with ion-exchanged water.
After drying, the degreasing rate was calculated from the amount of oil adhering before and after washing by the following formula 1, and compared with 1,1,1-trichloroethane. (2) Stability test The cleaning composition was kept at -5 ° C, 30 ° C, and 600 ° C, and observed for the separation and precipitation of the cleaning active ingredient.

[0017]

(Equation 1)

[0018]

[Table 1]

The numbers in the table indicate% by weight. 1) Surfactant A1 of the general formula (1) A1: the number of carbon atoms in R, 8〃 B1: n = 2, P = 8〃 B2: n = 2, P = 10 2) Aliphatic carboxylic acid C1: octylic acid〃 C2: 3,5,5-trimethylhexanoic acid 3) Other nonionic activator: lauryl alcohol (EO) ₈

[0020]

[Table 2]

[0021]

The cleaning agent of the present invention is an excellent water-based cleaning agent having a degreasing power comparable to that of a chlorine-based solvent and having a stable liquid state with little risk of environmental pollution.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4H003 AB03 AB44 AC08 AC09 BA12 DA14 DA15 DA16 DB01 DB02 DB03 EA15 EA21 EB07 ED02 FA03

Claims (1)

[Claims] At least (A) 1 to 20% by weight of a nonionic surfactant represented by the following general formula (1) (Wherein, the C number of R is 8, n is 2 or 3, and P is an integer of 1 to 15.) (B) 1 to 20% by weight of an aliphatic carboxylic acid having 6 to 12 carbon atoms; Cleaning agent consisting of compound (D) water