JPS591437B2 - Solvent composition for dry cleaning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solvent composition for dry cleaning textiles, and particularly to a solvent composition for dry cleaning textiles containing a fluorine-containing halogenated hydrocarbon containing a surfactant mixture as a main component. The present invention relates to a solvent composition.

Fibers made of materials such as cotton, wool, linen or other natural fibres, polyester, nylon, acrylic, polyurethane, acetate or other synthetic fibres, such as clothing, personal items, bedding, interior decoration or other coverings. Dry cleaning of laundry is usually carried out using a solvent containing a surfactant.

Conventionally, petroleum-based solvents and perchlorethylene have been widely used as this solvent. In particular, perchlorethylene has the characteristics of being plain compared to petroleum-based solvents, having excellent dissolving power, having a large specific gravity, which improves the cleaning effect, and being easy to dry. It was more suitable as a cleaning solvent.
However, perchlorethylene has drawbacks such as being highly toxic and easily causing air pollution compared to petroleum-based solvents. Fluorine-containing halogenated hydrocarbons such as 1,1,2-trifluorotrichloroethane are known as less toxic solvents than perchlorethylene.

However, this fluorine-containing halogenated hydrocarbon has a lower detergency than perchlorethylene, and has not been widely used as an addictive agent for dry creaming. Therefore, the present inventors have investigated the improvement of the detergency of dry cleaning solvents using fluorine-containing halogenated hydrocarbon hydrocarbons.
Various research studies were conducted. As a result, it has been found that detergency can be greatly improved by using a specific combination of surfactants. That is, as a surfactant, an anionic surfactant and an amphoteric surfactant are added in an amount of 0.05 to 5 (:!) to a fluorine-containing halogenated hydrocarbon medium, and an anionic surfactant. By setting the weight ratio of agent/ampholytic surfactant to 25/75 to 98/2, a composition excellent as a dry cleaning solvent can be obtained.
This is the gist of the present invention, that is, a surfactant-containing fluorine halogenated hydrocarbon system? In the solvent composition for dry cleaning of fibers, the main component of which is a solvent, the fluorine-containing halogenated hydrocarbon-based ? The surfactant is contained in the medium in an amount of 0.05 to 5% by weight, and the surfactant has an anionic surfactant/ampholytic surfactant weight ratio of 25/75.
This is a dry cleaning solvent composition characterized in that it is a mixture of an anionic surfactant and an amphoteric surfactant with a ratio of ~98/2. The fluorine-containing halogenated hydrocarbon solvent in the present invention is a halogenated hydrocarbon containing at least one fluorine atom in one molecule and having 1 to 4 carbon atoms and is liquid at room temperature.

For example, fluorotrichloromethane, 1,2-difluoro-tetrachloroethane, 1,1-difluorotetrathalolethane, 1.1.2-trifluorotrichloroethane, 1.1.1-trifluorotrithalolethane, 1
-Fluoro-1.1,2.2tetrachloroethane, 1-
Fluoro-1.2.2.2 Tetrachloroethane, 1.1
-difluoro”. 2.2-trichloroethane, 1.2-difluoro-1.1.2-tritaloloethane, 1-fluoro-1.1.2-trichloroethane, 1.2-difluoro-1.2-dichloroethane, hexafluoro-1.2-
dichlorocyclobutane or other fluorine-containing halogenated hydrocarbons. Preferred hydromedium is 1.1.2-
Trifluoro-1,2,2-trichloroethane, 1.2
Difluorotetrachloroethane and fluorotrichloromethane are particularly preferred, and 1.1.2trifluoro-1.2,2-trichloroethane is particularly preferred. Two or more of these fluorine-containing halogenated hydrocarbons may be used in combination, or may be used in combination with a small amount of another solvent. Examples of anionic surfactants include fatty acid salts, higher alcohol sulfate ester salts, sulfone salts of dibasic fatty acid esters, fatty acid ester salts, sulfates of aliphatic amines or aliphatic amides, aliphatic acid sulfonates, alkyl Allyl sulfonates, aliphatic alcohol phosphate ester salts, or other anionic surfactants can be used, but sulfone salts of dibasic fatty acid esters are particularly preferred, and specifically dialkyl sulfosuccinate ester salts are preferred. Most preferred.

For example, sodium di-2-ethylhexyl sulfosuccinate, sodium dihexyl sulfosuccinate, sodium diacyl sulfosuccinate, sodium diisobutyl sulfosuccinate, sodium di(4-methyl-2acyl) sulfosuccinate, di-J
Sodium meoctylsulfosuccinate, or other compounds. These sulfosuccinate hydrochloric acids can be used alone or in combination as anionic surfactants, and can also be used in combination with other surfactants. Particularly effective in combination are higher alcohol sulfate ester salts.
Ampholytic surfactants include those containing an anionic active group and a cationic active group in one molecule, or those containing an anionic active group or a cationic active group and a nonionic active group, and the former type is usually the most common.

Cationic active groups are usually nitrogen-containing groups such as amino groups and quaternary ammonium groups, and anionic active groups include carboxylic acid groups, sulfuric acid ester groups, and sulfonic acid groups. The preferred surfactant is an amphoteric surfactant called betaine type, which is a quaternary ammonium salt having a carboxylic acid group. Specific amphoteric surfactants include cetyl betaine, myristyl betaine,
lauryl betaine, N-octadecyloxymethyl N,
Examples include betaine type amphoteric surfactants such as N-dimethylbetaine, amino acid type amphoteric surfactants such as sodium lauryl aminopropionate and sodium octadecylpropionate, and sulfate ester salt type amphoteric surfactants such as sodium oleylaminoethyl sulfate. These amphoteric surfactants may be used alone or in combination of two or more. The combination ratio of these anionic surfactants and amphoteric surfactants is in the range of anionic surfactant/ampholytic surfactant -25/75 to 98/2, preferably,
The ratio is 50/50 to 90 to 10. In addition, the amount of the surfactant mixture in the fluorine-containing halogenated hydrocarbon is 0.05 to 5
% by weight, particularly from 0.1 to 1.0% by weight. The dry cleaning solvent composition of the present invention is
Furthermore, surfactants other than those listed above? agent, water, alkali agents such as alkali and alkaline salts, bleach, sour agent, glue,
Various additives such as filter aids and adsorbents can be added.

In particular, it is preferable to add nonionic surfactants such as nonionic surfactants and cationic nonionic surfactants to improve the texture of textiles, and alcohol, which is called a mutual solvent, to adjust the cleaning effect. glycols,
It is preferable to add a solvent such as glycol ethers, glycol esters, or water. The amount of these additives added is not particularly limited, but it is usually 5% by weight or less based on the fluorine-containing halogenated hydrocarbon, and in particular, the amount of nonionic surfactants for improving texture is 1% by weight or less. preferable.
For dry cleaning of the present invention? A major feature of the medium composition is that it contains an amphoteric surfactant.

By adding this amphoteric surfactant, oil? It has high cleaning efficiency not only for water-borne stains but also for water-based stains, which have been relatively difficult to clean in the past. In other words, as is clear from the examples, if the anionic surfactant alone is used as water? The cleaning efficiency for water-soluble stains is not sufficient, but by adding an amphoteric surfactant to this, the cleaning efficiency for water-soluble stains can be improved. In dry cleaning, additives such as surfactants and solvents are sold and stored separately, and are high-concentration additives used? Liquid? A so-called charge system is sometimes used in which the solution is diluted to the required concentration with a medium.
In the case of this charge system, the surfactant mixture according to the invention is added to the solvent at a concentration of 5 to 80% by weight, in particular 15 to 50% by weight. It is understood. this? The medium is usually a fluorine-containing halogenated hydrocarbon, which is a dry cleaning agent, but it may also be a mutual addictive agent or other addictive agent. The present invention can be applied to a charge system using this concentrated surfactant solution by dissolving it in a dry cleaning solvent during dry cleaning. EXAMPLES The present invention will be specifically explained below using Examples and Comparative Examples, but the present invention is not limited only to these Examples.

For dry cleaning in Examples and Comparative Examples? The solvent composition is prepared by preparing a single surfactant or a mixture of two or more surfactants, dissolving this in a mutual solvent as necessary, and then proceeding to step 1.1.

2-Trifluoro-1. Add required amount to 2-trichloroethane? This is what I understood.

A contaminated cloth test material prepared by the following method was added to these compositions, and the contaminated cloth was washed using a round-o-meter method.
Next, the reflectance of the washed item was measured and compared with the reflectance measured before washing and the reflectance of the uncontaminated cloth to calculate the cleaning efficiency. The results are shown in the table below. As is clear from the test results, it is recognized that the dry cleaning medium composition of the present invention has excellent cleaning efficiency.

Test method: Preparation of soiled fabric with 5 wt. A wool muslin is soaked in the solution, squeezed out to 80%, and then dried.

B. Aqueous-stained cloth (acid sweat-stained cloth) A wool muslin is soaked in the above mixture, squeezed out and dried.

C. Aqueous-stained cloth (fabric with alkaline sweat stains) A wool muslin is immersed in the above mixture, squeezed out to 80%, and then dried.

After measuring the reflectance of the contaminated cloth as described above, the contaminated cloth is washed by a rounder-o-meter method, and then the reflectance after washing is measured.

Also, measure the reflectance of uncontaminated cloth in advance. 0 Rounder Ometer one method cleaning? A contaminated cloth (5 x 10 cm) and 10 steel balls of 200ml of cleaning solvent composition were placed in the solution, washed at 25°C for 10 minutes, and then dried.

Examples 11 to 17, Comparative Examples 5 to 8 As a solvent, 1,1,2-trifluoro-1,2,'.
Evaluations similar to those described above were conducted for examples in which fluorotolylmethane was used instead of trichloroethane and the types of additives were changed.

Claims (1)

[Scope of Claims] 1. A solvent composition for dry cleaning of textiles containing a surfactant-containing fluorine-containing halogenated hydrocarbon solvent as a main component, wherein the surfactant is contained in the fluorine-containing halogenated hydrocarbon solvent. The surfactant is a mixture with an anionic surfactant containing 0.05 to 5% by weight, and the weight ratio of anionic surfactant/ampholytic surfactant is 25/75 to 98/2. A dry cleaning solvent composition characterized by: 2 The fluorine-containing halogenated hydrocarbon solvent is 1.1.2-
The dry cleaning solvent composition according to claim 1, which is trifluoro-1.2.2-trichloroethane. 3. The dry cleaning solvent composition according to claim 1, wherein the anionic surfactant is a dialkyl sulfosuccinate salt. 4. The dry cleaning solvent composition according to claim 1, wherein the amphoteric surfactant is a betaine type amphoteric surfactant. 5. The dry cleaning solvent composition according to claim 1, further comprising a nonionic surfactant and/or a mutual solvent. 6. A highly concentrated surfactant solution with a surfactant concentration of 15 to 50% by weight is dissolved in a fluorine-containing halogenated hydrocarbon to a concentration of 0.05 to 5.0% by weight to obtain a dry cleaning solvent. A dry cleaning solvent composition according to claim 1.