JPS6257491A - Detergent for non-aqueous washing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-aqueous cleaning agent for cleaning and removing various stains adhering to nine parts of various products such as machines and devices.

[Conventional technology]

Conventionally, Japanese Patent Application Laid-Open No. 59-1980 was developed as a method for cleaning and removing various types of dirt such as grease that adhere firmly to machines and equipment.
As disclosed in Japanese Patent Application Laid-open No. 157196 and Japanese Patent Application Laid-Open No. 59-202298, non-aqueous cleaning methods using organic solvents as the cleaning liquid are known.

The organic solvents mentioned above are generally perchloroethylene,
Chlorinated solvents such as 1,1,1-1-lichloroethane and methylene chloride are used, and recently 1,1,2-trichloroethane, 2,2, which has fewer problems of corrosivity and toxicity than chlorinated solvents, has been used. -Fluorine-based solvents such as trifluoroethane (hereinafter referred to as Freon 1) 3) are used.

Even in such a non-aqueous cleaning method, as proposed in Japanese Patent Publication No. 160 (1982), cleaning is carried out in an organic solvent, as in the case of ordinary cleaning methods that use water as the cleaning liquid. By adding a surfactant as an agent,
Efforts have been made to increase cleaning power.

[Problem that the invention seeks to solve]

However, in recent years, as seen in the electronics industry and precision machinery industry, there is a tendency for single product parts to become more precise and smaller. However, it is extremely difficult to completely dissolve and remove it.

Moreover, when the dirt to be dissolved and removed is made up of complex substances containing organic and inorganic substances, as is the case when cleaning fingerprints from glass parts, etc., it is necessary to remove not only the organic but also the inorganic dirt. Therefore, a certain degree of water solubilization ability is required in the organic solvent used. However, if ordinary surfactants such as those disclosed in the above-mentioned Japanese Patent Publication No. 55-1) No. 160 were used as cleaning agents in this type of cleaning method, the above requirements could hardly be met. .

Therefore, the present invention aims to significantly improve the cleaning power of non-aqueous cleaning methods, and moreover, uses a specific method that has a large ability to solubilize water into an organic solvent as a cleaning solution and can sufficiently remove inorganic stains. The purpose of the present invention is to provide a cleaning agent for non-aqueous cleaning using selective surfactants.

[Means for solving problems]

As a result of intensive studies to achieve the above object, the inventors found that alkanolamides of fatty acids or their alkylene oxide adducts should be used alone as surfactants to be applied to this type of non-aqueous cleaning method; Alternatively, when the above-mentioned specific surfactant is used in a combination system with other surfactants at a specific ratio or higher, cleaning power can be significantly improved, and water can be absorbed into the organic solvent as a cleaning solution. This invention was completed after learning that a cleaning agent with increased solubilization ability and capable of sufficiently removing inorganic stains could be obtained.

That is, this invention provides 35 to 100% by weight of fatty acid alkanolamide or its alkylene oxide adduct.
and 65 to 0% by weight of a surfactant other than the above as an essential component.

[Structure and operation of the invention]

The alkanolamide of a fatty acid in this invention is obtained by reacting a fatty acid or a derivative such as a lower alkyl ester thereof with an alkanolamine. One or a mixture of two or more saturated or unsaturated fatty acids may be used.

Further, examples of the above-mentioned alkanolamines include monoethanolamine, jetanolamine, monoisopropanolamine, diisopropanolamine, aminoethylethanolamine, etc., and one type or a mixture of two or more of these may be used.

The alkylene oxide adduct in this invention can be obtained by adding an alkylene oxide to the fatty acid alkanolamide obtained by the above method according to a known method. Here, the number of moles of alkylene oxide added is usually 1 to 100 moles, preferably 1 to 70 moles.

The alkylene oxide used to obtain the above-mentioned adduct is preferably ethylene oxide, propylene oxide, butylene oxide, styrene oxide, etc., and one type or a mixture of two or more of these is used. When used as a mixture of two or more types, the addition polymerization may be block copolymerization or random copolymerization.

In the present invention, the above fatty acid alkanolamide or its alkylene oxide adduct may be used alone as a non-aqueous cleaning agent, or depending on the type of dirt, these surfactants and other surfactants may be used. It may also be used in combination with activators.

That is, the surfactant constituting the non-aqueous cleaning agent of the present invention consists of 35 to 10% by weight of an alkanolamide of a fatty acid or an alkylene oxide adduct thereof, and 65 to 0% by weight of other surfactants. By using the fatty acid alkanolamide or its alkylene oxide adduct in a proportion of at least 35% by weight of the surfactant, particularly preferably in a proportion of 50% by weight or more, it improves the detergency and the organic solvent. It is possible to improve the solubilization ability of water.

In the present invention, examples of combinations of fatty acid alkanolamide or its alkylene oxide adduct with other surfactants include, for example, fatty acid alkanolamide or its alkylene oxide adduct with an anionic surfactant and/or Examples include a combination with an ionic surfactant, or a combination of an alkanolamide of a fatty acid or an alkylene oxide adduct thereof with a cationic surfactant or a mixture thereof with a nonionic surfactant.

Examples of the above-mentioned anionic surfactants include alkylbenzene sulfonates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl phenyl ether sulfates, higher alcohol sulfates, α-olefin sulfonates, and α-sulfo fatty acid esters. salts, fatty acid soaps, dialkyl sulfosuccinic acids, phosphoric acid esters or salts thereof, petroleum sulfonates, and the like.

Examples of the nonionic surfactants include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene/polyoxypropylene Examples include block or random copolymers, alkyl ethers or alkylphenyl ethers of polyoxyethylene/polyoxypropylene block or random copolymers.

Further, examples of the above-mentioned cationic surfactants include alkyltrimethylammonium chloride, alkylimidazolium chloride, alkyldimethylbenzylammonium chloride, polyoxyethylenealkylmonomethylammonium chloride, alkylisoquinolinium bromide, and alkylamine acetate. Can be mentioned.

Furthermore, in the present invention, in addition to the above combinations, other surfactants such as amphoteric surfactants and tertiary amine oxides may be used in combination. Examples of the amphoteric surfactant include dimethylalkylbetaine and alkyl(aminoethyl)glycine, and examples of the tertiary amine oxide include lauryldimethylamine oxide.

In the non-aqueous cleaning agent of the present invention, in addition to the surfactant component described above, appropriate subcomponents may be used in combination as necessary. Examples of this subcomponent include solvents such as ethyl cellosolve, ethyl carpitol, butyl cellosolve, butyl carpitol, propyl cellosolve, propyl carpitol, isobutyl cellosolve, and isobutyl carpitol.

In non-aqueous cleaning of dirt from parts of various products using such cleaning agents, appropriate organic solvents are used depending on the type of dirt, such as the aforementioned chlorine-based solvents and fluorine-based solvents. The above-mentioned cleaning agent components are added to the solvent in an amount of usually about 0.1 to 5% by weight, and the cleaning treatment is carried out in a conventional manner using an ultrasonic cleaner or the like. This treatment effectively removes the dirt and provides a good cleaning effect even if the dirt contains inorganic matter.

〔Effect of the invention〕

As described above, in this invention, fatty acid flucaramide or its alkylene oxide adduct is used in a specific ratio or more in a system in which it is used alone or in combination with other surfactants. , a cleaning agent for non-aqueous cleaning that can significantly improve the cleaning power of non-aqueous cleaning methods, and has a large ability to solubilize water in organic solvents as cleaning liquids, and can sufficiently remove inorganic stains. can be provided.

〔Example〕

EXAMPLES Below, examples of the present invention will be described in more detail.

Example Sample fish shown in the composition ratio (weight ratio) in Table 1 below.
The alkanolamide of fatty acids or its alkylene oxide adduct according to Nos. 1 to 10, a mixture thereof with other surfactants, or a mixture of these with other subcomponents was used as the non-aqueous cleaning agent of the present invention. . For reference, surfactants related to sample magnets 1) to 15 shown in the composition ratio (weight ratio) in the same table were used as non-aqueous cleaning detergents for comparison.

The numbers in parentheses for the surfactants in Table 1 indicate the number of polymerized moles of ethylene oxide or propylene oxide or the number of added moles of ethylene oxide or propylene oxide.

Using the above non-aqueous cleaning agent, a detergency test and a water solubilization test were conducted in the following manner.

Cleanability Test> Dirt consisting of a mixture of grease and carbon black was applied to a transparent acrylic resin plate of 100 Tsuru x 50 tm It was used as a test piece for cleaning. Next, this test piece was immersed in a Freon 1)3 solution prepared by adding 1% by weight of the cleaning agent according to Samples 1kl to 15, and washed in an ultrasonic cleaner at 25°C for 20 minutes.

After this washing, changes in the coated surface were visually observed and evaluated as ○ if most of the dirt had fallen off, Δ if more than half of the dirt had fallen off, and × if almost no dirt had fallen off. The results were as shown in Table 1.

<Water solubilization test> 40 ml of Freon 1) 3 was placed in a 100 ml graduated cylinder with a stopper, and 40% by weight of the detergent components according to Samples 1 & 1) to 15 above were added thereto. 3
After adding 5 ml of the solution, add water using a pipette.
ml of water was added and shaken, and the amount of water added was repeated while observing the degree of turbidity of the liquid until it became turbid, and the amount of water added immediately before turbidity was taken as the solubilized amount. The results were as shown in Table 1.

As is clear from the above table, sample floors 1 to 1 of this invention
The non-aqueous cleaning agent according to No. 0 has excellent cleaning properties and good water solubilization ability, but the cleaning agents according to comparative samples N1) 1) to 15 have inferior performance. I understand.

Claims (7)

[Claims] (1) Non-aqueous cleaning product characterized by containing as an essential component a surfactant consisting of 35-100% by weight of alkanolamide of fatty acid or its alkylene oxide adduct and 65-0% by weight of a surfactant other than the above. Washing soap. (2) The non-aqueous cleaning agent according to claim (1), wherein the fatty acid is a saturated or unsaturated fatty acid having 6 to 22 carbon atoms. (3) Claim (1) or Claim 1, wherein the alkanolamide is an amide of one or a mixture of two or more of monoethanolamine, diethanolamine, monoisopropanolamine, diisopropanolamine, and aminoethylethanolamine. The non-aqueous cleaning agent described in (2). (4) The alkylene oxide in the alkylene oxide adduct is one or two of ethylene oxide, propylene oxide, butylene oxide, and styrene oxide.
Claims (1) to (3) which are mixtures of more than one species
A cleaning agent for non-aqueous cleaning as described in any of the above. (5) The non-aqueous cleaning agent according to any one of claims (1) to (4), wherein the number of moles of alkylene oxide added in the alkylene oxide adduct is 1 to 100. (6) Any of claims (1) to (5), wherein the surfactant other than the alkanolamide of fatty acid or its alkylene oxide adduct is an anionic surfactant and/or a nonionic surfactant. A non-aqueous cleaning agent described in . (7) Claims (1) to (5) in which the surfactant other than alkanolamide of fatty acid or its alkylene oxide adduct is a cationic surfactant or a mixture of this and a nonionic surfactant. A cleaning agent for non-aqueous cleaning as described in any of the above.