SE176728C1 - - Google Patents

Description

Inventors: W Gutmann and L Heiss Priority set for 11 September 1958 (Federal Republic of Germany) It is already possible to use surfactants as chemical cleaners in chemical washing. It is furthermore the case that the surfactant compounds in particular develop a good cleaning effect, especially for aqueous solids, if they have the ability to bind water in the usual solvents, even in the presence of hydrophilic substances, e.g. gasoline carbonates or low molecular weight chlorine-containing aliphatic carbonates. The cleaning effect depends on the ability of the detergent builder to bind to water and emulsify, whereby the moisture content of the wash bath and the laundry is factors which are of decisive importance for the removal of the water-soluble contaminants. Since the pigment contaminants extracted during the washing process are filtered out, another essential condition for carrying out the washing process is added, namely that wash baths including the cleaning enhancer, solubilized water, loose and unresolved contaminants remain filterable. The hitherto, as cleaning enhancers, the products may meet the latter condition but substantially reduce the effect of a subsequent hydrophobicization of the laundry in an organic solvent with the usual metal experiences on the basis of aluminum, zirconium or titanium, whether due to their substantivity, i.e. bonding to the fibrous material, which prevents their priming, or at least necessitating a rinsing. Admittedly, there are also products kanda, which joke st8ra a subsequent hydrophobia with the usual metal compounds, e.g. acylated aluminum, titanium or zirconium alcoholates, from an organic bath. However, these products either give rise to an insufficient filterability of the water bath or do not have a satisfactory water-binding or emulsifying form. It has now been found that the chemical washing process can be carried out without adversely affecting the subsequent hydrophobing with the usual metal compounds. of aluminum, zirconium or titanium while effectively removing the water-soluble contaminants and ensuring a good water-binding capacity of the wash bath while maintaining its filterability, if compounds of the general formula are added to the usually non-chemical solvents during chemical washing. X - OCIVOOY where n represents a number between 1-3, X represents an aromatic hydrocarbon residue, in particular a benzene or naphthalene residue, R an alkyl residue having at least 3 carbon atoms, however the number of carbon atoms in all alkyl residues is at least 8, and Y represents mate or a salt-forming cation, which with the anion forms a salt soluble in the final organic detergents, in particular an alkali or alkaline earth metal or a low molecular weight amine. As the compounds of the above formula can for example be mentioned nonylfenoxiattiksyrans potassium salt, magnesium salt nonylfenoxiattiksyrans, dinonylfenoxiattiksyrans sodium salt, monoethanolamine salt of tributyl or nonylphenoxyacetic, dibutylresorcylattiksyrans magnesium salt, magnesium salt dinonylresorcylattiksyrans, dinonylnaftoxiattiksyrans magnesium salt, potassium salt dinonylnaftoxiattiksyrans. The salts which are to be used in the process of the present invention are added to the purification baths in amounts of about 0.5-50 g / l. Approximately 3 g / l is preferably used. In the place of the salts, one can in some cases add the free acids themselves or also mixtures of different salts and the free acids and their salts, respectively.

The associations have a distinct water-binding ability. The water can be added to the treatment bath hazard or during the washing process. Before or during the washing process, the water content of the bath is installed so that the textile material assumes a moisture content, which corresponds to a conditioning of 70-90% relative humidity. As usual for the chemical purification solvents, aliphatic hydrocarbons such as benzene or low molecular weight chlorinated aliphatic hydrocarbons such as carbon tetrachloride, methylene chloride, trichlorethylene, perchlorethylene, methyl chloroform and the like are obtained. In the process according to the invention, it may prove appropriate to add compounds which are capable of forming water bridges and which in turn do not produce a slight reduction in the hydrophobing effect. Examples of such compounds are, for example, low molecular weight alcohols such as methyl, ethyl or propyl alcohol, fatty alcohols such as octyl alcohol, dodecyl alcohol fatty acid ethanolamides and the like.

Sample kg of soiled filament garments of wool, cotton, cellulose, father, polyamide fibers, polyester fibers, polyacrylonitrile fibers and acetate fibers are washed in 100 l of tetrachlorethylene during continuous filtration in the bath. The water bath was mixed with 2 kg of the magnesium salt of the air nonylphenoxyacetic acid and the water addition is regulated so that a relative moisture content of 7580% lines in the washing system. Bath cleansing effect Si excellent, filterability very good. A subsequent hydrophobing of the cladding garments from a tetrachlorethylene bath with monostearic acid aluminum ethylate and Indonesian paraffin in the ratio 2: 1 gives without flaking an intermediate rinsing process with solvent a hydrophobing effect which is at least as good as in a hydrophobing of the material without predisposition. In comparison with this, a cleaning of the same type of fiber in tetrachlorethylene under the same conditions but during the addition of kanda cleaning intensifiers gives substantially the same value. The results are reported in the table below for cotton poplin. The rain samples are challenged according to the "Bundesmann" method.

Chart.

Cleaning enhancer 20 g / l.

Mixture of 70% alkylaryl sulphonate and% oxyethylated nonylene oil / petroleum sulphonate cetylpyridinium chloride Magnesium salt of the nonylphenoxyacetic acid untreated g / l untreated g / l 20 gil water uptake 56 41 80 23 a tetrachlorethylene bath. Similar good results are obtained if the alkali salts are used instead of the magnesium salt of nonylphenoxyacetic acid, e.g. sodium or potassium salts. Instead of the metal salts, the monoethanol, dietanol or triethanolamine salts can also be used. With the same success, it is also possible to use salts of dinonylphenoxyacetic acid or tributylphenoxyacetic acid resp. dinonyl naphthoxyacetic acid or dinonyl resorcyl acetic acid.

Claims (1)

Patent claim: residue with at least 3 carbon atoms, however, the number of carbon atoms in all alkyl residues must be at least 8, and Y represents irate or a salt-forming cation, which with the anion forms a salt weldable in the usual organic detergents, in particular an alkali or alkaline earth metal or a low molecular weight amine. Request publications: Stockholm 1961. Rungl. Boktr. P. A. Norstedt & Sealer. 610089 Process for chemical washing, characterized in that the washing is carried out with customary solvents, which contain cleaning enhancers of the general formula 11, -X-OCH2COOY where n denotes a belt number raglan 1-3, X denotes an aromatic piston residue, in particular a benzene or naphthalene radical, R and alkyl-