JPH06205902A - Dehydrating agent composition and method for removing moisture by using the same - Google Patents

Abstract

(57) [Summary] [Structure] At least one selected from the group consisting of amines or ammoniums having an oxyalkylene group, salts of these amines or ammoniums with specific organic acids, etc. as the surfactant 1,1- A dehydrating agent composition added to dichloro-1-fluoroethane. [Effect] It is possible to provide a dehydrating agent which is excellent in both dehydration performance and water separation ability and has little ozone depletion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehydrating agent composition, for example, to quickly remove water from a solid surface such as a metal material, a plastic material, a glass material, a ceramic material, or a product or part made of an organic or inorganic material. And more specifically 1,1-dichloro-1- having excellent water removing effect
The present invention relates to a dehydrating agent composition containing fluoroethane and a surfactant, and a method for removing water using the same.

[0002]

2. Description of the Related Art Conventionally, CFC113, which is a chlorofluoroethane compound, is nonflammable and has low biotoxicity.
Does not attack high molecular substances such as plastics and rubber,
It has advantages such as excellent selective solubility for dissolving grease and wax, and is widely used as a solvent, a cleaning agent, a dehydrating agent, etc. alone or as a mixture with other organic solvents.

However, it has been pointed out that CFC 113 has a risk of destroying the ozone layer in the stratosphere and seriously adversely affecting the ecosystem on earth including human beings. Therefore, the use and production of CFC113, which has a high risk of depletion of the ozone layer, has been limited by international agreements, and the development of solvents, cleaning agents, and dehydrating agents using alternative halogenated hydrocarbons is desired. There is.

It is also known that a composition containing a certain kind of surfactant in a halogenated hydrocarbon solvent is used as a dehydrating agent.

The properties that such a dehydrating agent should have are that water can be rapidly and completely removed from a solid surface (excellent dehydration performance), and that the removed water is mixed with a solvent and an emulsion phase. That is, it can be rapidly and completely separated without forming (excellent water separation property). Furthermore, it is difficult for the surfactant to dissolve in water, and its performance lasts for a long time.

However, in general, the more excellent the dehydration performance of the composition, the more easily the water removed from the object to be treated forms an emulsion phase with the solvent, and thus the rate at which the water and the solvent are completely separated becomes slower. There was no dehydrating agent which was liable to be easy and had excellent dehydration performance and water separation ability.

[0007] 1,1-Dichloro-1-fluoroethane is a solvent containing chlorine in the molecule, but also hydrogen, so that there is little danger of destroying the ozone layer. However, it has not been used as a dehydrating agent because it has a low specific gravity of 1.23 and is inferior in dehydration performance by itself.

For example, Japanese Patent Laid-Open No. 1-135502 discloses that
Although a solvent containing 1,1-dichloro-1-fluoroethane and various surfactants is shown, the combination thereof does not satisfy the above performance.

[0009]

The object of the present invention is to
By combining a specific surfactant with 1-dichloro-1-fluoroethane, a dehydrating agent composition with less ozone depletion and excellent in both dehydration performance and water separation ability, and water removal using the same To provide a way to do.

[0010]

Means for Solving the Problems As a result of intensive studies, the present inventor has found that 1,1-dichloro-1-fluoroethane and a surfactant are contained, and the surfactant is (a) oxy An amine having an alkylene group, (b) This amine and the general formula: R ¹ COOH, HOOCR ² COOH, R ¹ SO ₃ H, R ¹ OSO ₃ H, R ¹ OPO ₃ H or (R ¹ O) ₂ PO ₂ (However, in this general formula, R ¹ is an alkyl group or an alkylphenyl group having 1 to 20 carbon atoms which may be substituted with a hydroxy group, and R ² is an alkylene group having 1 to 10 carbon atoms.). A salt with an organic acid represented by the formula, and (c) at least one selected from the group consisting of a quaternary ammonium salt consisting of an oxyalkylene group-containing ammonium and an acid radical of the organic acid. It was found that the dehydrating agent composition effectively achieves the above object, and has arrived at the present invention.

The dehydrating agent composition of the present invention preferably contains 0.05 to 10% by weight of the above-mentioned surfactant and has an interfacial tension with water at 20 ° C. of 6 dyn / cm or less.

The present invention also provides a method for removing water from a solid surface using the above-described dehydrating agent composition of the present invention.

In the above surfactant used in the present invention, "having an oxyalkylene group" means containing a mono- or polyoxyalkylene group.

As the amine having an oxyalkylene group,

[Chemical 1] (However, in this general formula I, R ³ is an alkyl group having 6 to 15 carbon atoms and may be linear or branched, and R ⁴ and R ⁵ are hydrogen atoms or methyl groups,
m and n are zero or an integer of 1 to 5, m and n cannot be zero at the same time, and the sum of m and n is 1
Is ~ 10. ) And mono- and polyoxyalkylene alkylamines.

In addition,

[Chemical 2] (However, in this general formula II, R ³ and R ⁴ are the same as defined above, R ⁶ is an alkyl group having 1 to 15 carbon atoms, and p is an integer of 1 to 5.) Also included are oxyalkylene dialkylamines.

The amines of the general formulas (I) and (II) and the general formulas: R ¹ COOH, HOOCR ² COOH, R ¹ SO ₃ H, R ¹ OSO ₃
A preferable example is a salt (neutralization product) with the above-mentioned specific organic acid represented by H ₂ , R ¹ OPO ₃ H or (R ¹ O) ₂ PO ₂ H.

The quaternary ammonium salt consisting of ammonium having an oxyalkylene group and the acid radical of the above-mentioned specific organic acid is

[Chemical 3] (However, in this general formula III, R ³ , R ⁴ , R ⁵ and R ⁶
Is the same as above, q and r are integers of 1 to 5, the sum of q and r is 2 to 6, and the acid radical is the acid radical of the above-mentioned specific organic acid. The compounds represented by the formula () are exemplified as preferable ones.

Typical examples of the above-mentioned "amine or salt" include, for example, monooxyethylene lauryl amine, dioxyethylene dilauryl amine, dioxyethylene lauryl ethyl amine, dioxyethylene lauryl amine dibutyl phosphate, monooxypropylene. Examples thereof include octylamine octylate, dioxyethylene dilaurylamine nonylbenzenesulfonate, di (dioxyethylene) octyllaurylamine caprate, monooxyethylene dioxyethylene dioctylamine dioctyl phosphate, and the like.

Typical examples of the above-mentioned "quaternary ammonium salt" include, for example, dioxyethylene dilauryl ammonium octylate, monooxyethylene monooxypropylene dilauryl ammonium caprate,
Examples thereof include dioxyethylene lauryl ammonium dioctyl phosphate, monooxyethylene monooxypropylene lauryl ethyl ammonium-2-ethyl butyrate and di (dioxyethylene) palmityl propyl ammonium octylate.

As an example of the production of these ammonium salts, for example, a dialkylamine is reacted with a necessary amount of alkylene oxide to obtain a mono (or poly) oxyalkylenedialkylamine, which is then neutralized with a desired acid. Further, a method for producing by reacting a necessary amount of alkylene oxide can be mentioned.

The ratio of the above-mentioned surfactant compounded in 1,1-dichloro-1-fluoroethane is 0.05.
-10% by weight is preferable, and it is more preferable to select 0.1 to 3% by weight, which can reduce the interfacial tension of the dehydrating agent composition with water to 6 dyn / cm or less (20 ° C). it can.

If the amount of the above-mentioned surfactant is less than the above range, the interfacial tension will not be sufficiently lowered, and it will be difficult to exert the dehydrating effect. The agent easily forms an emulsion, and it is difficult to separate the agent quickly and completely, or a large amount of the surfactant remains on the surface of the object to be treated, and it is easy to require a complicated procedure for its removal.

Although the dehydrating agent composition of the present invention is excellent in chemical stability, known stabilizers may be added to further improve the stability. Specific examples of such stabilizers include nitro compounds such as nitromethane, nitroethane, nitropropane, nitrobenzene and nitrostyrene; 3
-Methyl-1-butyn-3-ol, 3-methyl-1-
Acetylene alcohols such as pentin-3-ol;
Glycidol, methyl glycidyl ether, allyl glycidyl ether, phenyl glycidyl ether, 1,2
-Epoxides such as butylene oxide, cyclohexene oxide, epichlorohydrin; dimethoxymethane,
1,2-dimethoxyethane, 1,4-dioxane, 1,
Ethers such as 3,5-trioxane; hexene, heptene, octene, 2,4,4-trimethyl-1-pentene, pentadiene, octadiene, cyclohexene,
Unsaturated hydrocarbons such as cyclopentene; olefinic alcohols such as allyl alcohol, 1-buten-3-ol, 3-methyl-1-buten-3-ol; methyl acrylate, ethyl acrylate, butyl acrylate,
Examples thereof include acrylic acid esters such as vinyl methacrylate, and these may be used alone or in combination of two or more kinds.

Further, by using the above stabilizer in combination with the following stabilizer, a synergistically improved stabilizing effect is achieved. Such stabilizers include phenol, trimethylphenol, thymol, 2,6-
Phenols such as di-t-butyl-4-methylphenol, butylhydroxyanisole, isoeugenol; benzotriazole, 2- (2'-hydroxy-
Examples thereof include triazoles such as 5′-methylphenyl) benzotriazole and chlorobenzotriazole.

These stabilizers are 1,1-dichloro-1-
It is more preferable to form an azeotrope with fluoromethane, and the amount of the azeotrope used varies depending on the kind of the stabilizer and the like, but it is preferably about 0.1 to 5% by weight so long as the dehydration effect is not hindered.

The article treated with the dehydrating agent composition of the present invention is not particularly limited as long as it is a solid article insoluble in 1,1-dichloro-1-fluoroethane, but may be a ball bearing, a valve, a cock or the like. Various machine parts, motors,
Typical examples include semiconductor elements, printed wiring boards, electric and electronic parts such as terminals.

Further, as the material thereof, for example,
Iron, stainless steel, nickel, nickel alloy, chrome, chrome alloy, copper, brass, bronze, aluminum, zinc,
In addition to metallic materials such as magnesium, semiconductor materials such as silicon and germanium, inorganic materials such as glass and ceramics, polyamide, polyester, polyethylene,
Examples thereof include plastic materials such as polyacetal and polycarbonate.

The water adhering to the surface of these articles may be in the form of a thin layer or in the form of water droplets of various sizes. Such water is not only pure water but also a dilute aqueous solution of a detergent or soap. May be

As a method of removing the water adhering to the above-mentioned article by using the detergent composition of the present invention, a known method can be adopted. That is, the surface of the article may be treated with the composition of the present invention. Examples of such treatment means include dipping the article in the composition, spraying, brushing, or other surface treatment methods. Can be adopted. At that time, if necessary, the effect of removing water may be promoted by stirring, shaking, irradiation with ultrasonic waves, or the like.

The treatment temperature is not particularly limited, but usually 10 ° C.
It is selected as desired from the range from the degree to the boiling point of the composition. Further, the treatment time may be selected so that water is removed, and normally, several seconds to several minutes are sufficient.

The surface of the treated article may be washed with 1,1-dichloro-1-fluoroethane or a halogenated hydrocarbon or other solvent if the surfactant needs to be removed.

[0032]

In the dehydrating agent composition of the present invention, at least one selected from the group consisting of an amine or ammonium having an oxyalkylene group, a salt of this amine or ammonium and a specific organic acid, etc. is surface-active. 1,1 as an agent
-Since it is added to dichloro-1-fluoroethane,
It is possible to provide a dehydrating agent that is excellent in both dehydration performance and water separation ability and has low ozone depletion.

[0033]

EXAMPLES Examples of the present invention will be described below, but the following examples do not limit the present invention, and various modifications can be made based on the technical idea thereof.

Various surfactants shown in Table 1 below were added to 1,1-dichloro-1-fluoroethane at respective concentrations,
The interfacial tension of the obtained composition with water at 20 ° C. was measured.

[0035]

[0036]

Dehydration test Iron test piece (30 mm x 30 mm x 2 mmt, diameter 7 in the center)
mm hole) was dipped in water, then dipped in a treating solution having the composition shown in Table 1 for 30 seconds, and then washed with a predetermined amount of anhydrous methanol. The water content in this washing liquid (methanol) was analyzed by the Karl Fischer method (A value).

As a blank test, the amount of water was determined in the same manner except that the use of the treatment liquid was omitted (B value).

The water removal rate (%) was calculated according to the following formula. Moisture removal rate (%) = (B−A) / B × 100 The temperature of the treatment liquid was 20 ° C. The results are shown in the table below.
2 shows.

Water Separation Test A glass bottle with a lid of 120 ml was charged with 60 ml of the treating solution having the composition shown in Table 1. Then, 40 ml of water was added, and the mixture was shaken vigorously 100 times for 60 seconds on a shaker.

At the same time as standing still, start measuring time,
The width of the emulsified layer of water and the treatment liquid after 10 minutes was measured and calculated as the volume ratio of the emulsified layer to the whole. The test is 20 ℃
I went there. The results are shown in Table 2 below.

[0042]

From Table 2, it can be seen that the dehydrating agent composition of the present invention is a dehydrating agent having excellent dehydrating performance and water separating ability.

Claims (3)

[Claims] 1. A composition comprising 1,1-dichloro-1-fluoroethane and a surfactant, wherein the surfactant is (a) an amine having an oxyalkylene group, (b) this amine and a general formula: R ¹ COOH, HOOCR ² COOH, R ¹ SO
₃ H, R ¹ OSO ₃ H, R ¹ OPO ₃ H or (R ¹ O) ₂ PO ₂ H (however, in this general formula, R ¹ has 1 to 20 carbon atoms which may be substituted with a hydroxy group. An alkyl group or an alkylphenyl group, R ² is an alkylene group having 1 to 10 carbon atoms), a salt with an organic acid, and (c) ammonium having an oxyalkylene group, and an acid radical of the organic acid. A dehydrating agent composition comprising at least one selected from the group consisting of quaternary ammonium salts consisting of 2. A surfactant containing 0.05 to 10% by weight,
The dehydrating agent composition according to claim 1, which has an interfacial tension with water at 6 ° C. of 6 dyn / cm or less. 3. A method for removing water from a solid surface using the dehydrating agent composition according to claim 1.