JP2000008080A - Industrial detergent composition and cleaning using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an industrial detergent composition useful for cleaning e.g. glass products or metallic parts, safely handleable and excellent in cleaning off solid contaminants and being rinsed with water by including benzyl alcohol, a specific glycol ether, a specific surface-active agent and water. SOLUTION: This detergent composition comprises (A) benzyl alcohol, (B) a water-soluble glycol ether exemplified by a compound of formula I (R1 is an 1-4C hydrocarbon group; and R2 is H or a methyl) or compound of formula II (R3 is an 1-3C hydrocarbon group; R4 is R2; R5 is an 1-2C hydrocarbon group), (C) a nonionic surface-active agent having a HLB of 12 to 18 and (D) water and furthermore, if necessary, (E) alkanol amine, an alkali salt, organic acid, deformer or thickener, wherein the composition, when totally corresponding to 100 wt.%, comprises 50 to 70 wt.% of component A, 20 to 40 wt.% of component B, 1 to 20 wt.% of component C and 5 to 20 wt.% of component D.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial cleaning composition and a cleaning method, and more particularly to a method for safely and effectively removing various solid contaminants adhering to a member having a hard surface such as a metal or glass material. The present invention relates to an industrial cleaning composition that can be removed (hereinafter, also simply referred to as “cleaning composition”) and a cleaning method using the same.

[0002]

2. Description of the Related Art Conventionally, the following cleaning agents have been used for many contaminants. That is, water-based cleaning agents having a low cleaning effect and low selectivity for cleaning contaminants having different polarities and properties such as halogenated hydrocarbons such as 1,1,1-trichloroethane and methylene chloride, fluxes and waxes, petroleum pitches and waxes. Polar solvents such as glycol ethers and N-methyl-2-pyrrolidone Non-polar solvents such as paraffinic hydrocarbons and naphthenic hydrocarbons.

[0003]

However, it is known that halogenated hydrocarbons generally have strong toxicity to the human body and lack safety for the environment.
Permanent use in the future is at stake.

Although water-based cleaning agents have general-purpose effects for cleaning contaminants having different polarities and characteristics, they have effects such as increasing the cleaning temperature, extending the cleaning time, and enhancing the capability of the cleaning equipment. There were many points to be noted when performing an effective cleaning.

[0005] Glycol ethers and N-methyl-2
-Polar solvents such as pyrrolidone are effective for flux and petroleum-based pitch contamination, but lack effectiveness for cleaning non-polar contamination such as waxes.

[0006] Non-polar solvents such as paraffinic hydrocarbons and naphthenic hydrocarbons have a practical effect for cleaning waxes, but lack practicality for cleaning polar and ionic contaminants. Only the effect was obtained.

[0007] In order to make the cleaning effective, a cleaning agent using a mixture of a polar solvent and a non-polar solvent has also been proposed. However, it is flammable, and great care must be taken in handling it for safety. In other words, a safe, relatively gentle washing operation provides a practical washing effect, and is useful for solid contamination of complex contamination systems in which different polarities and characteristics coexist, and carbonized processing oils and resin systems. There is a need for cleaning agents.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems. That is, the industrial detergent composition according to claim 1 comprises the following (A) to (D).
The components are blended to make the whole 100% by weight.

(A) 50 to 70% by weight of benzyl alcohol (B) 20 to 40% by weight of a water-soluble glycol ether represented by the following general formula

Embedded image (C) Nonionic surfactant 1 having an HLB of 12 to 18
(D) 5 to 20% by weight of water. The industrial detergent composition according to claim 2 has the following (A)
(E) to 100% by weight.

(A) 50-70% by weight of benzyl alcohol (B) 20-40% by weight of a water-soluble glycol ether represented by the following general formula

Embedded image (C) Nonionic surfactant 1 having an HLB of 12 to 18
(D) 5-20% by weight of water (E) At least one selected from the group consisting of alkanolamines, alkali salts, organic acids, antifoaming agents, and thickeners is the remaining weight% ((A) To (D) is 9% by weight, for example.
6% by weight means "4% by weight").

According to a third aspect of the present invention, there is provided a method for cleaning glass or metal parts with a stock solution of the industrial cleaning composition according to the first or second aspect, and thereafter rinsing with water. Is the way.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION (A) Benzyl alcohol Benzyl alcohol is the main ingredient of the detergent composition of the present invention, and it is essential to use it in the range of 50 to 70% by weight in the preparation. If it is less than 50% by weight, the washing performance is poor, and if it exceeds 70% by weight, the rinsing properties and the stability of the preparation are poor.

(B) Water-Soluble Glycol Ether Examples of the water-soluble glycol ether include: a. Diethylene glycol monomethyl ether a. Diethylene glycol monoethyl ether a. Diethylene glycol monoisopropyl ether a. Diethylene glycol mono normal propyl ether a. Diethylene glycol monoisobutyl ether a. Diethylene glycol mono normal butyl ether a. Dipropylene glycol monomethyl ether a. Dipropylene glycol monoethyl ether b. Diethylene glycol dimethyl ether b. Diethylene glycol diethyl ether b. Dipropylene glycol dimethyl ether b. Examples thereof include dipropylene glycol diethyl ether, and it is essential that the compound be water-soluble at least at room temperature. Glycol ethers other than these have poor cleaning properties, rinsing properties and stability.

In the preparation, the water-soluble glycol ether contains 20
If the amount is less than 40% by weight, the rinsing properties and the stability of the preparation are poor.

(C) Nonionic surfactant Nonionic surfactants include polyoxyalkylene alkyl ether type, polyoxyalkylene alkyl phenyl ether type, polyoxyalkylene fatty acid ester type,
Various nonionic surfactants such as a polyoxyethylene polyoxypropylene block copolymer type are exemplified. Less than 1% by weight of the formulation is inferior in rinsing properties and formulation stability,
If it exceeds 20% by weight, the cleaning properties are mainly poor. HLB is 12
It is necessary to be in the range of １８18, and if it is out of this range, the rinsing property and the stability are deteriorated.

[0016] (D) water water, pure water and ultrapure water, or ion exchange water is preferable. The mixing ratio is 5 to 20% by weight. If the amount is less than 5% by weight, flammability may be exhibited and there is a problem in safety. If the amount is more than 20% by weight, detergency and formulation stability are poor.

In addition, in the cleaning composition of the present invention, the above four components (A) to (D) are essential components, and when the composition balance is deviated, the stability of the cleaning agent is lost and a stable cleaning effect is obtained. Cannot be obtained, the expected high cleaning effect cannot be obtained, the solid-contamination cleaning properties of different properties are poor, good rinsing properties with water after the cleaning operation cannot be obtained, and further, the cleaning stability cannot be obtained. This raises the problem.

The cleaning composition of the present invention exerts an excellent cleaning action on solid contaminants adhering to hard surfaces such as glass, metal materials, plastics, pottery, mirrors, etc. Hydrocarbons, paints, greases,
Demonstrates excellent performance for cleaning components with hard surfaces to which wax and the like have adhered.

The detergent composition of the present invention is basically used in the form of an undiluted solution. However, when the solid contamination is relatively low, the detergent composition can be diluted with water. When the content is less than 100% by weight even with the components (A) to (D) (even in this case, if the components (A) to (D) are within the above-mentioned predetermined mixing ratios, the problem is solved. Can be solved), as the component (E), an alkanolamine, an alkali salt, an organic acid, an antifoaming agent or a thickener may be used in combination to make the total amount 100% by weight.

Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine and the like.

As the alkali salts, potassium hydroxide,
Examples include sodium orthosilicate and potassium pyrophosphate.

Examples of the organic acid include formic acid, oxalic acid, citric acid, glycolic acid and the like.

Examples of the antifoaming agent include a silicone-based antifoaming agent, a mineral oil-based antifoaming agent, and a polyglycol-based antifoaming agent.

Examples of the thickener include carboxymethyl cellulose, polyvinyl alcohol and the like.

As the washing operation, any washing operation method such as immersion washing method, stirring washing method, ultrasonic washing method and brush washing method can be applied.

The cleaning composition of the present invention is safe in handling, is capable of rapidly dissolving and washing any solid contaminants, and is an excellent industrial product which can be easily rinsed with water after the cleaning operation. It is a cleaning composition.

[0027]

EXAMPLES Next, the industrial cleaning composition of the present invention will be described in detail, but these are for explanation and not intended to be limiting.

[0028] Examples, and the components described in Comparative Example below [Table 1] were blended Te than in the ratio described in the table, the detergent composition of the present invention 1-5, and Comparative detergent composition 1 12 was created.

[0029]

[Table 1]

The performance and effects of these detergent compositions (appearance stability, detergency (1), detergency (2),
Detergency (3), rinsing, and safety (flammable))
Was examined. The results are shown in Table 2 below.

Example of Effect (Appearance Stability) Each detergent composition was placed in a 200 ml glass bottle, and was heated at 35 ° C. ×
After standing in a thermostat for 3 days, the "appearance stability" of each cleaning composition was visually judged according to the following criteria. <Criterion> Stability ：: homogeneous stable state Stability ×: separated state.

Example of Effect (Washability (1)) A commercial acrylic water-based paint was applied to a stainless steel test piece for approximately 1 mm, air-dried at room temperature for 1 hour, and used as a sample for washing. Each washing solution was collected in a 1 liter glass container and adjusted to a temperature of 40 ° C. Next, the paint-adhered model plate prepared above was immersed, and was immersed and washed for 20 minutes. After 20 minutes, immediately rinse with tap water at 40 ° C,
After drying with a hot-air dryer at 0 ° C., the cleaning property was evaluated. The acrylic water-based paint remaining on the model plate was actually measured by a gravimetric method and evaluated according to the following criteria. <Criterion> Detergency ：: Residual paint less than 2 mg / sheet Detergency ：: Residual paint 2 mg to less than 5 mg / sheet Detergency △: Residual paint 5 mg to less than 50 mg / sheet Detergency X: Residual paint 50 mg or more / sheet.

Example of effect (detergency (2)) A petroleum pitch-based fixing agent (contaminant) was diluted with methylene chloride, an aluminum die-cast part was immersed, air-dried, and used as a cleaning sample. Each washing solution was collected in a 1 liter glass container and adjusted to a temperature of 50 ° C. Next, the previously prepared model aluminum die-casting part with petroleum pitch adhered was immersed and subjected to ultrasonic cleaning at 40 KHz / 600 W for 2 minutes. After 2 minutes, immediately rinse with 40 ° C tap water,
Furthermore, finish rinsing was performed with soft water at room temperature, and after drying with a hot air drier at 80 ° C., the cleaning property was evaluated. The petroleum pitch-based fixing agent remaining in the model aluminum die-cast part was measured by ultraviolet spectrophotometry and evaluated according to the following criteria. <Criterion> Detergency ：: Residual pitch less than 20 μg / sheet Detergency ：: Remaining pitch 20 μg to less than 50 μg / sheet Detergency △: Remaining pitch 50 μg to less than 200 μg / sheet

Example of Effect (Washability (3)) A paraffin wax having a melting point of 90 ° C. was melted, a glass test piece was immersed, and air-cooled before use as a cleaning sample. Each washing solution was collected in a 1-liter glass container and adjusted to a temperature of 60 ° C. Next, the paraffin wax-adhered model glass material prepared above was immersed and washed with stirring for 3 minutes. After 3 minutes, the sample was immediately rinsed with tap water at 40 ° C., further rinsed with pure water at room temperature, dried with a hot air dryer at 70 ° C., and evaluated. Paraffin wax remaining in the model glass material was measured by infrared spectrophotometry and evaluated according to the following criteria. <Criterion> Detergency ：: Residual wax less than 10 μg / sheet Detergency ：: Residual wax 10 μg to less than 30 μg / sheet Washability Δ: Remaining wax 30 μg to less than 100 μg / sheet

Example of Effect (Rinseability) A clean polished glass test piece was used as a specimen for confirming the rinseability. Each washing solution was collected in a 500 ml glass container and adjusted to a temperature of 40 ° C. Next, each of the previously prepared clean glass test pieces was immersed in the cleaning solution,
The mixture was stirred for minutes. After 3 minutes, immediately immersed in a 40 ° C. tap water tank for 10 seconds and further in a room temperature pure water tank for 20 seconds,
Each of the cleaning agents that adhered after rinsing with a hot air dryer at 80 ° C. and were not completely rinsed were measured by infrared spectrophotometry, and evaluated based on the following criteria. <Criterion> Rinsability ◎: Residual detergent less than 5 μg / sheet Rinsability ○: Residual detergent 5 μg to less than 10 μg / sheet Rinsability Δ: Residual detergent 10 μg to less than 20 μg / sheet Rinsability ×: Residual detergent 20 μg or more / sheet Sheet.

Effect Example (Safety) The cleaning composition of the present invention and the comparative cleaning composition were checked for flammability by a tag-closed measuring method and a Cleveland open-type measuring method by a hazardous substance type 4 confirmation test. Done. A composition which was confirmed to be flammable by the measurement method and was confirmed to be a dangerous substance class 4 was evaluated as ×, and a composition which was confirmed to be non-dangerous substance according to the measurement method was evaluated as ◎.

[0037]

[Table 2]

[0038]

The industrial detergent composition of the present invention is safe in handling, is capable of rapidly dissolving and washing any solid contaminants, and is easily rinsed with water after the washing operation. It is an excellent cleaning composition that can be used.

Claims (3)

[Claims] An industrial detergent composition comprising the following components (A) to (D) to make the total amount 100% by weight. (A) 50 to 70% by weight of benzyl alcohol (B) 20 to 40% by weight of a water-soluble glycol ether represented by the following general formula: (C) Nonionic surfactant 1 having an HLB of 12 to 18
-20% by weight (D) 5-20% by weight of water 2. An industrial detergent composition comprising the following components (A) to (E) to give a total of 100% by weight. (A) 50 to 70% by weight of benzyl alcohol (B) 20 to 40% by weight of a water-soluble glycol ether represented by the following general formula: (C) Nonionic surfactant 1 having an HLB of 12 to 18
(E) alkanolamine, alkali salts, organic acid, antifoaming agent, thickener, remaining weight% 3. A cleaning method comprising washing a glass or metal part with an undiluted solution of the industrial detergent composition according to claim 1, and then rinsing with water.