JPH0586398A - Non-halogen cleaning agent composition and washing therewith - Google Patents

Abstract

PURPOSE:To obtain the subject compsn. capable of removing contaminants such as a rest-proofing oil by washing therewith without damage to a primed part by blending an alkylbenzene with a cyclohexylamine compd. CONSTITUTION:100 pts.wt. alkylbenzene of formula I (R<1> is a linear or branched 4-18C alkyl) is blended with 0.01 pts.wt. cyclohexylamine compd. of formula II [X and Y are H or a group (AO)mH, provided that not both of X and Y and H at the same time; A is 2-3C alkylene; and (m) is 1 to 3] to obtain a non-halogen cleaning agent compsn. According to the foregoing formulation, a combination of a predetermined amt. of the compd. of the formula II with the compd. of the formula I as the solvent component remarkably increases the dissolving power of the latter to widen the kinds of substances soluble therein and removable therewith. The cleaning agent comps. has a high flash point, a low volatility, a low irritant action and an excellent workability, and can remove surface contaminants such as a rust-proofing oil by washing therewith without damage to a primer applied on the surface of a metallic material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel and useful non-halogen detergent composition and a cleaning method to which the detergent composition is applied.

[0002]

Freon-based solvents such as trichlorotrifluoroethane and chlorinated solvents such as trichloroethylene, 1,1,1-trichloroethane and perchloroethylene are nonflammable and chemically stable, and are oily base coatings. It does not attack metal surfaces coated with a primer such as plastic or plastics, has strong penetrability, and has many excellent properties such as quick drying, so it is a large size that can not be chemically converted until now. It has been used in a wide range of fields as a cleaning agent for steel materials and plastics.

Here, the primer is used to improve the adhesion between the metal base material and the topcoat paint and at the same time improve the rust preventive power. Depending on the use and purpose, the primer and the zinc are used. Chromate primer,
Zinc rich primer, urethane resin primer, epoxy resin primer, polyurethane resin primer,
Various primers such as alkyd resin primer and vinyl primer are used.

In recent years, these halogen-based solvents have come to be regulated due to the necessity of global environmental protection, and as a cleaning agent having the ability to replace CFCs and chlorine-based solvents at present,
For example, a detergent composition has been proposed in which an alkylene oxide adduct of an aliphatic alcohol is blended as a solvent component (JP-A-3-62895, JP-A-3-1521).
No. 97). However, there is a problem that the primer is damaged when the metal material treated with the primer is washed with these detergents.

[0005]

DISCLOSURE OF THE INVENTION The present invention has excellent characteristics of conventionally known CFC and chlorine-based detergents, that is, it is chemically stable, retains excellent detergency, and destroys the environment. A cleaning composition that is not afraid and does not damage a base coating such as a primer applied to the surface of a material when cleaning a metal material, that is, a novel useful cleaning composition that can substitute for a CFC or chlorine-based cleaning agent, and An object is to provide a practical cleaning method to which the cleaning agent is applied.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found the following facts and have completed the invention based on such findings. That is,

1. Alkylbenzene having a specific structure is used as a solvent component, and a cyclohexylamine-based compound having a specific structure is used in a predetermined amount in combination with the solvent to dramatically improve the dissolving power as a synergistic effect. Since it expands, it becomes a more general-purpose detergent composition.

2. The cleaning composition has a high flash point,
Low volatility, low irritation, and excellent workability.

3. A non-ionic interface having a specific structure as a rinsing treatment agent in a post-treatment step adopted as necessary after the washing treatment, that is, a rinsing step of removing the detergent composition remaining on the material to be washed. By applying the aqueous solution of the activator, it is possible to avoid damage to the primer, which has been a problem in the past.

The halogen-free detergent composition according to the present invention contains 0.01 to 10 parts by weight of the cyclohexylamine compound represented by the general formula (2) with respect to 100 parts by weight of the alkylbenzene represented by the general formula (1). It is characterized by containing parts by weight.

[In the formula, R ¹ is a linear or branched carbon number 4
Represents an alkyl group of -18. ]

[In the formula, X and Y are the same or different and each represents a hydrogen atom or a group-(AO) mH. However, neither X nor Y is a hydrogen atom. A represents an alkylene group having 2 to 3 carbon atoms. m shows the integer of 1-3. ]

In the alkylbenzene according to the present invention, the alkyl group bonded to the aromatic ring may be linear or branched, and may be a mixture of each. Of these, linear alkylbenzene, which has good biodegradability, is preferable.

The carbon number of the alkyl group is 4 to 18, preferably about 10 to 16. When the number of carbon atoms is less than 4, it is highly toxic, and it is not preferable to use this as a detergent component in view of the danger and complexity of the work of handling it. On the other hand, when the number of carbon atoms exceeds 18, the dissolving power for dirt components such as rust preventive oil and machine oil is lowered, which is not preferable.

As the cyclohexylamine compound,
Examples thereof include EO adducts of cyclohexylamine, PO adducts and co-adducts thereof, and these may be used alone or in combination of two or more. In particular, when the EO adduct of cyclohexylamine is applied, a detergent composition having a very good dissolving power can be obtained. Also, by adding alkylene oxide to cyclohexylamine, the boiling point can be raised to improve the safety as a detergent composition, and the odor peculiar to cyclohexylamine can be reduced to improve the working environment. You can

In this case, the number of moles of alkylene oxide added is preferably about 1 to 6 moles. In particular, when the 2 mol adduct is applied, the detergent composition obtained has a large detergency and is low in foaming property, which is more practical.

The mixing ratio of the cyclohexylamine compound to 100 parts by weight of alkylbenzene is 0.01 to
10 parts by weight, preferably 0.05-5 parts by weight. If the amount of the cyclohexylamine-based compound is less than 0.01 parts by weight, the dissolving power for the material to be washed tends to decrease, and even if the amount exceeds 10 parts by weight, there is a significant difference in cleaning effect. Is not observed and tends to adversely affect the primer portion, which is not preferable in any case.

The detergent composition according to the present invention may optionally contain various conventionally known additives such as an antioxidant, a fungicide, a rust preventive and an antifoaming agent.

The above-mentioned non-halogen type cleaning composition is a fat or oil,
It has an epoch-making feature that it dissolves mineral oils, waxes, rust preventive oils, cutting oils, etc., and at the same time does not damage the primer of the base paint. Therefore, the material to be cleaned to which the cleaning composition is applied is not particularly limited, and various materials such as metals and plastics are specifically illustrated, but the cleaning composition is not particularly subjected to a primer treatment. Metal materials such as machine tools, industrial machines, agricultural equipment, precision machines, automobiles, railway vehicles, containers,
It is useful as a cleaning agent for parts such as ships and bridge structures.

Generally, a cleaning system for metal parts is
At least, it consists of a step of cleaning dirt components adhering to the surface of the object to be cleaned and a subsequent step of drying the material to be cleaned. Normally, the cleaning agent remaining on the object to be cleaned between the cleaning step and the drying step. A step of removing the composition, a so-called rinsing step is taken.

In order to construct a cleaning system including such steps and having excellent performance, it is important to combine the cleaning composition with the rinse treatment agent. For example, when cleaning a metal material that has been subjected to a primer treatment, even if the primer is not damaged in the cleaning step, it is not practical if it is damaged in the next rinsing step. Further, even a rinse treatment agent which does not damage the primer must not be a composition which cannot sufficiently remove the detergent component.

In the present invention, a polyoxyalkylene alkylphenyl ether type nonionic surface active agent represented by the general formula (3) is used as a rinsing agent which is washed with a detergent composition mainly containing alkylbenzene and then applied. A chemical solution is proposed.

[In the formula, R ² represents an alkyl group having 8 to 10 carbon atoms. A represents an alkylene group having 2 to 3 carbon atoms. n is 5
Indicates an integer of -16. ]

Among such polyoxyalkylene alkyl phenyl ethers, polyoxyethylene nonyl phenyl ether is preferable. Even if the same alkylene oxide addition type surfactant is rinsed with polyoxyalkylene alkyl ether or polyoxyalkylene alkyl sulfonate, the removal of the detergent component may be insufficient or the material to be cleaned may In the case of a metal part that has been subjected to a primer treatment, there is a tendency for the primer to be damaged such as swelling or peeling from the metal surface.

The concentration of the surfactant in the rinse treatment agent is 0.
It is about 05 to 5% by weight, preferably about 0.2 to 2% by weight. If the amount is less than 0.05% by weight, the cleaning agent components are not sufficiently removed, and even if the amount is more than 5% by weight, no remarkable superiority is observed in the rinsing effect. Absent.

Next, the cleaning method according to the present invention will be described in detail, but the cleaning conditions are not particularly limited as long as a predetermined effect can be obtained. (1) Washing step The article to be washed is immersed in the detergent composition adjusted to about 10 to 50 ° C, preferably about 20 to 30 ° C for about 30 minutes to 2 hours, and the washing liquid is stirred or shaken. Or aeration, or by using these operations together, dirt components and metal oil agents such as rust preventives are washed and removed. Generally, the cleaning speed is increased by raising the cleaning temperature or by stirring. (2) Rinsing Step After washing, the surface is washed with the above-mentioned aqueous surfactant solution (rinsing treatment agent) heated to room temperature to about 50 ° C. to remove the detergent component remaining on the surface of the raw material in the above step. (3) Washing step Washing with water to remove the rinse treatment agent. (4) Drying step Drying is performed by passing warm air or hot air.

When the cleaning method according to the present invention is applied, that is, when the present cleaning composition and the rinse treatment agent are applied in combination, the dirt components mixed in the rinse treatment agent float on the surface of the rinse treatment agent to form a layer. To do. Therefore, in an actual system, the rinse treatment agent can be repeatedly used by collecting and removing the stain layer formed on the surface of the rinse treatment agent, which is extremely economical.

[0025]

EXAMPLES The present invention will be described in detail below with reference to examples. The cleaning agent components used in each example are as follows. ○ Alkylbenzene: Product name "Alkylbenzene AB-
SG ", manufactured by Mitsubishi Petrochemical Co., Ltd. (hereinafter abbreviated as" AB ") ○ 2 mol adduct of ethylene oxide with cyclohexylamine: trade name" Wandamine CHE-20P ", manufactured by Shin Nippon Rika Co., Ltd. (hereinafter referred to as" CHE ") (Abbreviated.) O Ethylene oxide adduct of nonylphenol: trade name "Liponox NC-95", manufactured by Lion Corporation (hereinafter abbreviated as "NC-95").

Example 1 150 ml of a detergent composition consisting of 100 parts by weight of AB and 5 parts by weight of CHE was placed in a 200 ml beaker and the mixture was kept at 25 ° C. with stirring, and rust preventive oil (JIS
An iron primer-treated iron plate (40 × 20 × 1 mm) to which Z 1801 compliant product was attached was immersed and washed for 15 minutes with stirring. Detergency was evaluated by visually observing the degree of rust-preventing oil remaining on the test piece after washing and the degree of damage to the primer-treated portion. As a result, the surface of the test piece was clean, and no damage was observed on the primer-treated part.

Then, the test piece after the cleaning treatment was NC.
Rinsing was performed with a 1% by weight aqueous solution of -95 for 10 minutes, followed by washing with water for 10 minutes and then drying at 105 ° C for 30 minutes.
The dried test piece was visually observed. as a result,
The surface of the test piece was clean, and no damage was found on the primer-treated part.

Comparative Example 1 AB was applied as a cleaning agent, and the rust-preventing oil adhering to the primer-treated iron plate was washed under the same conditions as in Example 1, and the rust-preventing oil remained on the surface of the test piece. However, the cleaning was insufficient.

Comparative Example 2 A cleaning composition consisting of 100 parts by weight of AB and 15 parts by weight of CHE was applied, and the rust preventive oil adhering to the primer-treated iron plate was washed under the same conditions as in Example 1. Although it was clean, part of the primer was peeled off.

Comparative Example 3 When a treatment was carried out in the same manner as in Example 1 except that a 1% by weight aqueous solution of 8 mol of ethylene oxide of lauryl alcohol was used as a rinse treatment agent, a part of the primer portion was swollen.

[0031]

EFFECTS OF THE INVENTION By applying the cleaning composition and the cleaning method according to the present invention, the rust preventive oil and the like adhered to the surface of the material to be cleaned can be removed without damaging the primer portion applied to the surface of the metal material. Dirt components can be washed away.

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Claims (3)

[Claims] 1. A cyclohexylamine-based compound represented by the general formula (2) is contained in an amount of 0.01 to 10 parts by weight with respect to 100 parts by weight of the alkylbenzene represented by the general formula (1). A halogen-free cleaning composition. [Chemical 1] [In the formula, R ¹ represents a linear or branched alkyl group having 4 to 18 carbon atoms. ] [Chemical 2] [In the formula, X and Y are the same or different and each represents a hydrogen atom or a group-
Represents (AO) m H. However, neither X nor Y is a hydrogen atom. A represents an alkylene group having 2 to 3 carbon atoms. m shows the integer of 1-3. ] 2. After washing with the halogen-free detergent composition according to claim 1, rinsing with a polyoxyalkylene alkylphenyl ether type nonionic surfactant aqueous solution represented by the general formula (3), and then A washing method characterized by washing with water. [Chemical 3] [In the formula, R ² represents an alkyl group having 8 to 10 carbon atoms. A
Represents an alkylene group having 2 to 3 carbon atoms. n shows the integer of 5-16. ] 3. The non-halogen-based cleaning composition according to claim 1 or the cleaning method according to claim 2, wherein the material to be cleaned is a metal material subjected to a primer treatment.