EP1861543A1

EP1861543A1 - Method for chemically cleaning textile material

Info

Publication number: EP1861543A1
Application number: EP06707433A
Authority: EP
Inventors: Frank-Peter Lang
Original assignee: Clariant Produkte Deutschland GmbH
Current assignee: Clariant Produkte Deutschland GmbH
Priority date: 2005-03-15
Filing date: 2006-03-06
Publication date: 2007-12-05
Also published as: JP2008535951A; CA2601177A1; DE102005011722B4; RU2007137825A; DE102005011722A1; WO2006097213A1; RU2404315C2; CN101151411A; US20090031504A1

Abstract

The invention relates to a method for chemically cleaning textile material, characterised in that the textile material is treated with a compound of formula (1), wherein R1, R2, R3 and R4 have the meaning cited in the description.

Description

description

Process for the dry cleaning of textile material

In addition to the washing of textiles with water and detergents, as is the case in private households, but also in commercial laundry, the dry-cleaning of textiles is of great importance. This takes place in water-sensitive textiles, as well as stubborn dirt, especially in oily and greasy soiling instead.

As a cleaning medium were and still are here

Halogenated hydrocarbons used. These include, e.g. chlorohydrocarbons which are no longer permitted in Germany trichloroethene, 1,1-trichloroethane and dichloromethane. Even those previously widely used in dry cleaning

Chlorofluorocarbons (CFCs) are no longer approved for this application in many countries.

The use of tetrachloroethene (perchlorethylene, PER) is still widespread.

Tetrachloroethene is a volatile chlorinated hydrocarbon which, due to its fat-dissolving property as a solvent and cleaning agent, is widely used commercially

Use, so also in the textile cleaning found.

The disadvantages of PER are its potential carcinogenic effects

Humans, its high volatility, its easy solubility in fatty

Food and its highly water polluting properties.

PER is classified as a "dangerous substance" in the "black list" of the EU and as

Hazardous substance classified according to the Ordinance on Hazardous Substances.

In the dry cleaning dangers result from the used

Solvent, in particular by perchlorethylene, then, when these in the

Get around.

Potential emission sources are the cleaning machine, the drying air, the contact water, the distillation sludge, the textile material due to insufficient drying and / or as a result of the retention of the solvent, as well as

Accidents. Depending on the state of environmental legislation and the observance and control of laws, the emission paths for organic solvents in the area of chemical cleaning plants are limited to different degrees in the various countries.

In Germany, textile cleaning companies and machine manufacturers face a large number of requirements for limiting perchlorethylene emissions, such as the maximum permissible values for PER emissions in the exhaust gas, in the drum area and in neighboring areas, which means a high level of technical complexity. Regardless of the control of the PER emissions in the textile cleaning companies, PER can be retained in considerable quantities in the most important textile substrates (wool, polyester) (retention), so that the discharge of solvents through the textiles is also important. In the case of the PER, this can then lead to indoor air pollution far beyond the textile cleaning companies at the consumer.

With the chlorofluorocarbons (CFCs), which are now no longer approved in most countries in chemical cleaning, extremely low drying temperatures and, due to the high volatility, even short drying times and thus low mechanical stress on the textiles were possible.

This reliably prevented irreversible damage to textiles with the care symbol "F".

As technical alternatives to the no longer permissible CFCs, as well as to the widely used PER, halogen-free hydrocarbon solvents (HCS) have long been used. Originally, the KWL were only intended as a replacement for CFCs for cleaning particularly sensitive textiles. The KWL are straight-chain aliphatics or mixtures of straight-chain, branched and cyclic aliphatics having 10 to 14 C atoms. Their higher boiling range of about 180 to 210 ⁰ C, it differs significantly from the previously also used in textile cleaning gasoline fractions or perchlorethylene with a boiling point of only 121 ⁰ C. The KWL are in large quantities in the US and Japan in the chemical Cleaning used. A disadvantage of the use of HCL, however, is that as a result of the low vapor pressures, the drying temperatures increased and / or the drying times must be significantly extended. Thus, sensitive textiles are thermally and mechanically significantly more heavily loaded, which reduces the useful life of the consumer.

In addition, there is a significantly higher energy consumption for the distillation and recycling of KWL compared to PER.

Thus, there is still the need for organic solvents, which not only have a good cleaning power, but are also to be assessed as toxicological or ecological evaluation and because of their physicochemical properties better than the prior art.

In addition, these should be able to be used extensively in the cleaning processes which are used in the state of the art for perchlorethylene (PER) and hydrocarbon solvents (HCL).

The PER cleaning process consists of three stages:

1) The actual cleaning in a solvent bath to which a little more water and cleaning enhancers (surfactants, co-solvents and other components containing) are added.

2) The drying with hot air and the recovery of the solvent via condensation and adsorption.

3) The solvent regeneration by filtration and distillation, or desorption.

Cleaning with the KWL takes place in principle in the same stages as the PER cleaning process. The cleaning techniques offered by different manufacturers differ by a separation of cleaning and drying (reloading), an integration of cleaning and drying in a machine (closed procedure), as well as by inerting during cleaning and drying (nitrogen, combination of fresh air and circulating air or vacuum).

The following requirements should, at least to a large extent, be fulfilled by organic solvents which are considered as an alternative to perchlorethylene or to hydrocarbon solvents:

A good cleaning power in general and a good detachability for water-soluble or water-swellable dirt and pigment dirt, possibly by water / surfactant combinations (cleaning booster); a very good dissolving power for fats and oils; good dispersibility and dispersion stability of pigment soil to prevent graying; no or very little influence on fibers, dyeings and finishes, ie only limited swelling of fibers, no negative influence on felt shrinkage of wool, negligible changes in the thermo-mechanical properties of fibers, no separation of dyes, finishes, hot melt adhesives, etc. (not even in the case of drying); a very low retention in the fiber substrate; no solvent smell in the cleaned textiles; high volatility to facilitate drying and recovery; a sufficiently high flashpoint; no or little corrosivity to metals and other materials of the cleaning and drying machines, even in the presence of water; no or little decomposition under cleaning and distillation conditions, ie in the presence of dirt and at higher temperatures; a low viscosity to facilitate soil removal and better mechanical separation of the solvent by centrifugation; a low water solubility, but a certain ability to dissolve water (possibly by the addition of surfactants and other solubilizers); a dissolving power for so-called cleaning enhancers (containing, for example, nonionic, anionic, cationic, arrtphotere surfactants, other solvents, such as (2-methoxymethylethoxy) propanol, special salts, bleaches, disinfectants, antistatic agents and other additives); Formation of stable water / surfactant emulsions in the solvent; Compliance with the procedural maximum values specified by the care labeling; as well as a low human and ecotoxicity. The object of the present invention is to provide organic solvents which better fulfill the abovementioned requirements for dry cleaning than the solvents used according to the prior art and which have a better toxicological and ecological property profile.

It has now surprisingly been found that compounds of formula (1) have a better cleaning power or solubility for fats and oils and a better soil-carrying capacity and thus cause less graying and toxicologically and ecologically much more favorable than perchlorethylene or hydrocarbon solvents and more In addition, meet the other aforementioned requirements and thus are excellent as detergents for dry cleaning.

The invention thus relates to the use of compounds of the formula (1) as organic cleaning agents and solvents in the dry-cleaning of textiles,

(D where

A is (CH ₂ ) _a or phenylene,

R ^1, R ^2, R ³ and R ⁴ identically or independently denote Ci to C ₂₂ -n- and / or iso- alkyl, C ₅ or C _ö cycloalkyl, phenyl-C _-C-4 alkyl, Ci-Cg-alkyl-phenyl or phenyl and a is an integer from 0 to 6.

Preferably, R ¹ , R ² , R ³ and R ^{4 are the} same or independently C ₁ to Ci ₃ - n- and / or iso-alkyl, C ₅ or C ₆ cycloalkyl, phenyl-Ci-C ₂ alkyl -, d-Cg-alkyl-phenyl or phenyl and a is preferably 0 to 2. R ¹ , R ² , R ³ and R ⁴ are particularly preferably or independently of one another C ¹ to C ₈ -n- and / or iso-alkyl, cyclohexyl, benzyl or phenyl and a is preferably 0 or 1.

Most preferably, R ¹ , R ² , R ³ and R ^{4 are the} same or independently of one another Ci to C ₃ -n- and / or iso-alkyl and a is 0.

Examples of the radicals R ¹ to R ⁴ are, for example: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-butyl Amyl, iso-amyl, tert-amyl, neopentyl, cyclopentyl, n-hexyl, iso-hexyl, cyclohexyl, octyl, decyl, isotridecyl, phenyl, benzyl, phenyl-ethyl -, nonyl-phenyl.

The compounds of the general formula (1) are acetals.

Acetals are generally prepared by the reaction of aldehydes with 2 moles of a

Alcohol per carbonyl group in the presence of catalysts, e.g. dry hydrogen chloride, obtained.

For the synthesis of compounds of formula (1) dialdehydes must be used. Preferred dialdehydes for the synthesis of compounds of formula (1) are glyoxal, malondialdehyde (1, 3-propanedial, 1,3-propanedialdehyde),

1, 4-butanedial and terephthalaldehyde.

A very preferred dialdehyde is glyoxal, which is a compound of the formula

(1) with a = 0 leads.

A particularly preferred compound for the described

The intended use is tetramethoxyethane (2) from Clariant

(2)

and the analogous compound tetraethoxyethane.

Compounds of the formula (1) can be used in various stages of chemical cleaning, both in the commercial sector and in the domestic chemical cleaning. In particular, this includes the Application as solvent and cleaning agent in basic cleaning. Here, the compounds of formula (1) the detergents perchlorethylene, hydrocarbons and other solvents completely replace.

The use of the solvents of the formula (1) can be carried out according to the known processes in so-called "PER machines" or in "KWL machines" (for example Satec).

Representative process conditions for the use of the compounds of formula (1) are given by the process conditions set out below for PER and KWL machines.

Depending on the physicochemical properties more specific

Compounds of formula (1), process modifications or

Modifications of the cleaning machines may be required.

For example, due to different boiling points, due to different radicals R ¹ to R ⁴ and / or different values for a, others

Drying temperatures may be required and e.g. Variations in the

Distillation conditions for the recovery of the solvents (pressure, temperature) are necessary.

By deviating flash points from those of the KWL used, safety-related modifications, e.g. by the kind of inertization

(Residual oxygen levels) will be required.

In particular, by the variation of the organic radicals R in the

Solvents of formula 1, the solvent power for nonpolar substances (other

Solvents, greases, oils) as well as polar substances and solvents (including water) can be specifically adjusted.

For example, different retentions and viscosities may also require different g-factors when spinning off the solvents. In practice, higher g-factors are used in KWL machines

Application as in PER machines.

Other factors which can be changed / optimized by the use of solvents of formula (1) are e.g. Cleaning time, liquor ratio,

Reversierrhytmus, load, type and amount of used

Cleaning booster, application of a bubble bath by blowing a

Air-solvent mixture for the gentle cleaning of sensitive textiles.

All such modifications of the conventional method of chemical cleaning which result from the use of the novel solvents of the formula (1) are readily ascertainable to the person skilled in the art by orienting experiments.

In dry cleaning, a distinction is further made between the one-bath and the two-bath process. Standard ware is usually cleaned in a two-bath process with a short liquor ratio in the first and a longer liquor ratio in the second bath. The first bath serves to replace the Main soil. Solvents of the formula (1) can be used in the one-bath and the two-bath process.

But it is also a combination of detergents of formula (1) with perchlorethylene, hydrocarbons or other solvents and thus a partial replacement of conventional solvents in principle possible. In addition to the use as a "main cleaning agent" (basic cleaning), compounds of formula (1) can also be used in so-called detangling agents, in cleaning activators or in cleaning enhancers.The Detachur refers to the removal of stains from textiles in the commercial textile cleaning The following groups of detackifiers are distinguished:

1) Brushing agents are used for pre-taching large areas of soiled batches of textiles. They are applied undiluted before the basic cleaning with a soft brush or by spraying on the heavily soiled areas

2) Focusing agents are used to treat intense specific stains on textiles. They are placed before the basic cleaning directly on the spot and left to act.

3) Postdyeing agents are used after the basic cleaning to remove any remaining stains.

Cleaning activators serve to remove stains and can be used e.g. also contain odor absorbers. They are used in the pre-treatment bath and save brushing as a dirt remover.

Cleaning enhancers are intended to increase the cleaning action as an additive to the organic solvent used as cleaning agent and, in particular, to effect the detachment of water-soluble or water-swellable impurities which are not or only poorly soluble in the organic solvent. Such water-soluble compounds are also, for example, road salt (NaCl in high purity or else in a mixture with CaCl ₂ or MgCl ₂ sols) as described in US Pat Winter is used for deicing of sidewalks and roads. Furthermore, they are intended to remove insoluble pigment soil and to exhibit pigment dispersancy and thus prevent the redeposition of detached, particulate soil. Furthermore, they serve to avoid leaching and the improvement of the goods handle.

Cleaning enhancers usually contain surfactants (in particular anionic, nonionic, amphoteric surfactants or even cationic surfactants), solvents, antistatic agents, plasticizers or handle-improving additives and optionally special additives such as disinfectants and bleaches / Furthermore, small amounts of water can be introduced into the cleaning bath via the cleaning enhancer, which is emulsified with the surfactants in the organic solvents.

The cleaning agent bath, ie the solvent of the formula (1) used for the basic cleaning, the spotting agents, the cleaning activators and the cleaning boosters containing solvents of the formula (1) may contain the following further soil release reinforcing components.

surfactants

Surfactants which, in addition to or in the detergents of formula (1), e.g. in

Tetramethoxyethane (2) can be used are:

Anionic surfactants

Suitable anionic surfactants are sulfates, sulfonates, carboxylates, phosphates and mixtures thereof. Suitable cations here are alkali metals, such as sodium or potassium or alkaline earth metals, such as calcium or magnesium and ammonium, substituted ammonium compounds, including mono-, di- or Triethanolammoniumkationen, and mixtures thereof. The following types of anionic surfactants are particularly preferred: alkyl ester sulfonates, alkyl sulfates, alkyl ether sulfates, alkylbenzenesulfonates, alkanesulfonates and soaps, as described below. Alkyl ester sulfonates include linear esters of C ₈ -C ₂₂ carboxylic acids (ie, fatty acids) which are sulfonated by means of gaseous SO ₃ . suitable Starting materials are natural fats, such as tallow, coconut oil and palm oil. The carboxylic acids may also be synthetic in nature. Preferred alkyl ester sulfonates are compounds of the formula

R ¹ CH COOR

SO ₃ M

wherein R ^{1 is} a C ₈ -C ₂ o-hydrocarbon radical, preferably alkyl, and R is a C ₁ -C ₆ hydrocarbon radical, preferably alkyl. M is a cation which forms a water-soluble salt with the alkyl ester sulfonate. Suitable cations are sodium, potassium, lithium or ammonium cations, such as monoethanolamine, diethanolamine and triethanolamine. Preferably, R ^{1 is} Cio-C- | ₆ alkyl and R is methyl, ethyl or isopropyl. Particularly preferred are methyl ester sulfonates in which R ^{1 is} Cio-Ci ₆ alkyl.

Alkyl sulfates are salts or acids of the formula ROSO ₃ M wherein R is a C1 ₀ -C ₂₄ - hydrocarbon radical, preferably an alkyl or hydroxyalkyl radical having C ₁₀ -C ^ o alkyl moiety, more preferably a _C12-C1 8 alkyl or hydroxyalkyl is.

M is hydrogen or a cation, e.g. an alkali metal cation (e.g., sodium, potassium, lithium) or ammonium or substituted ammonium, e.g. Methyl, dimethyl and trimethylammonium cations and quaternary ammonium cations such as tetramethylammonium and dimethylpiperidinium cations and quaternary ammonium cations derived from alkylamines such as ethylamine, diethylamine, triethylamine and mixtures thereof.

Alkyl ether sulfates are salts or acids of the formula RO (A) _m SO ₃ M, where R is an unsubstituted C 10 -C 24 -alkyl or hydroxyalkyl radical, preferably a C ₁₂ -C 20 -alkyl or hydroxyalkyl radical, more preferably C ₁ - C ₂ -C ₈ alkyl or hydroxyalkyl. A is an ethoxy or propoxy moiety, m is a number greater than 0, preferably between about 0.5 and about 6, more preferably between about 0.5 and about 3, and M is a hydrogen atom or a cation, such as eg Sodium, potassium, lithium, calcium, magnesium, ammonium or a substituted ammonium cation.

Specific examples of substituted ammonium cations are methyl, dimethyl, trimethylammonium and quaternary ammonium cations such as tetramethylammonium and dimethylpiperidinium cations and those derived from alkylamines such as ethylamine, diethylamine, triethylamine or mixtures thereof. Examples which may be mentioned are C ₁₂ -C fatty alcohol ether sulfate wherein the content of EO is 1, 2, 2.5, 3 or 4 mol per mol of the fatty alcohol ether sulfate and in which M is sodium or potassium.

In secondary alkanesulfonates, the alkyl group may be either saturated or unsaturated, branched or linear and optionally substituted with a hydroxyl group. The sulfo group can be at any position of the C chain, with the primary methyl groups at the beginning of the chain and chain end no

Have sulfonate groups.

The preferred secondary alkanesulfonates contain linear alkyl chains of about 9 to 25 carbon atoms, preferably about 10 to about 20 carbon atoms, and more preferably about 13 to 17 carbon atoms. The cation is, for example, sodium, potassium, ammonium, mono-, di- or

Triethanolammonium, calcium or magnesium, and mixtures thereof. Sodium as a cation is preferred.

Secondary alkanesulfonate is sold under the trade name Hostapur SAS (Fa.

Clariant) available.

In addition to secondary alkanesulfonates, it is also possible to use primary alkanesulfonates in the detergents according to the invention. The preferred alkyl chains and cations are the same as those of the secondary alkanesulfonates.

Other suitable anionic surfactants are alkenyl or alkylbenzenesulfonates.

The alkenyl or alkyl group may be branched or linear and optionally substituted with a hydroxyl group. The preferred alkylbenzenesulfonates contain linear alkyl chains having about 9 to 25 carbon atoms, preferably from about

10 to about 13 carbon atoms, the cation is sodium, potassium, ammonium,

Mono-, di- or triethanolammonium, calcium or magnesium and mixtures thereof. Magnesium is preferred as the cation for mild-surfactant systems, whereas sodium is preferred for standard applications. The same applies to alkenylbenzenesulfonates.

The term anionic surfactants also includes olefin sulfonates obtained by sulfonation of C ₈ -C ₂₄ -, preferably be obtained with sulfur trioxide and subsequent neutralization. Due to the preparation process, these olefin sulfonates may contain minor amounts of hydroxyalkanesulfonates and alkanedisulfonates.

Other preferred anionic surfactants are carboxylates, e.g. Fatty acid soaps and comparable surfactants. The soaps may be saturated or unsaturated and may contain various substituents such as hydroxyl groups or α-sulfonate groups. Preferred are linear saturated or unsaturated hydrocarbon radicals as hydrophobic moiety with about 6 to about 30, preferably about 10 to about 18 carbon atoms.

Also suitable as anionic surfactants are salts of acylaminocarboxylic acids which are acylsarcosinates formed by reaction of fatty acid chlorides with sodium sarcosinate in an alkaline medium; Fatty acid-protein condensation products obtained by reaction of fatty acid chlorides with oligopeptides; Salts of alkylsulfamidocarboxylic acids; Salts of alkyl and alkyl aryl ether carboxylic acids; sulfonated polycarboxylic acids; Alkyl and Alkenylglycerinsulfate as Oleylglycerinsulfate, Alkylphenolethersulfate, alkyl phosphates, alkyl ether phosphates, isethionates, such as acyl isethionates, N-Acyltauride, alkyl succinates, sulfosuccinates, monoesters of sulfosuccinates (especially saturated and unsaturated Ci ₂ -Ci ₈ monoesters) and diesters of sulfosuccinates (especially saturated and unsaturated C ₂ -C ₈ diesters), acyl sarcosinates, sulfates of alkylpolysaccharides such as sulfates of glycosides alkylpolyglycosides, branched primary alkyl sulfates, and alkyl polyethoxy carboxylates such as those of the formula RO (CH ₂ CH ₂₎ RCH ₂ COO-M ⁺ wherein R is C ₈ to C _{2 is} 2-alkyl, k is a number from 0 to 10 and M is a cation. Nonionic surfactants

Condensation products of aliphatic alcohols with about 1 to about 25 mol

Ethylene oxide.

The alkyl chain of the aliphatic alcohols may be linear or branched, primary or secondary, and generally contains from about 8 to about 22 carbon atoms.

Particularly preferred are the condensation products of C 10 to C ₂₀ alcohols with about 2 to about 18 moles of ethylene oxide per mole of alcohol. The alkyl chain can be saturated or unsaturated. The alcohol ethoxylates may have a close ("Narrow

Range Ethoxylates ") or a broad homolog distribution of ethylene oxide

("Broad Range Ethoxylates"). This class of products includes e.g. the

Genapol ^® brands (Fa. Clariant).

Condensation products of ethylene oxide having a hydrophobic base formed by condensation of propylene oxide with propylene glycol. The hydrophobic part of these compounds preferably has a molecular weight between about 1500 and about 1800. The addition of ethylene oxide to this hydrophobic part leads to an improvement in water solubility. The product is liquid up to a polyoxyethylene content of about 50% of the total weight of the condensation product, which corresponds to a condensation with up to about 40 moles of ethylene oxide. Commercially available examples of this product class are the ^® Genapol PF grades (Clariant).

Condensation products of ethylene oxide with a reaction product of propylene oxide and ethylenediamine.

The hydrophobic moiety of these compounds consists of the reaction product of ethylenediamine with excess propylene oxide and generally has a molecular weight of about 2,500 to 3,000. Ethylene oxide is added to this hydrophobic unit to a content of about 40 to about 80 wt .-% polyoxyethylene and a molecular weight of about 5000 to 11000. Commercially available examples of this class of compounds are the ^® Tetronic brands of BASF and the ^® Genapol PN brands of Clariant GmbH. Semipolar nonionic surfactants

This category of nonionic compounds includes water-soluble amine oxides, water-soluble phosphine oxides, and water-soluble sulfoxides each having an alkyl group of about 10 to about 18 carbon atoms. Semi-polar nonionic surfactants are also amine oxides of the formula

R here is an alkyl, hydroxyalkyl or alkylphenol group having a chain length of about 8 to about 22 carbon atoms, R ² is an alkylene or hydroxyalkylene group having about 2 to 3 carbon atoms or mixtures thereof, each R ¹ is an alkyl or hydroxyalkyl group having from about 1 to about 3 carbon atoms or a polyethylene oxide group having from about 1 to about 3 ethylene oxide units and x represents a number from 0 to about 10. The R ¹ groups may be linked together via an oxygen or nitrogen atom be and thus form a ring. Amine oxides of this type are particularly C ₁₀ -C- _I e- alkyldimethylamine and Cs-C ^ -Alkoxiethyl-dihydroxyethyl amine oxides.

fatty acid amides

Fatty acid amides have the formula

wherein R is an alkyl group having from about 7 to about 21, preferably about 9 to about 17 carbon atoms and each radical R ^{1 is} hydrogen, Ci-C ₄ alkyl, CrC ₄ - hydroxyalkyl or (C ₂ H ₄ O) _x H means where x varies from about 1 to about 3. Preferred are C ₈ -C ₂ o-amides, -monoethanolamide, diethanolamides and - isopropanolamides. Further suitable nonionic surfactants are alkyl and Alkenyloligoglycoside and Fettsäurepolyglykolester or Fettaminpolyglykolester having in each case 8 to 20, preferably 12 to 18 C-atoms in Fettal kylrest, alkoxylated triglycamides, mixed ethers or Mischformyle, Alkyloligoglycoside, Alkenyloligoglycoside, fatty acid N-alkylglucamide, phosphine oxides, dialkylsulphoxides and protein hydrolysates.

Polyethylene, polypropylene and polybutylene oxide condensates of alkylphenols.

These compounds include the condensation products of alkylphenols having a CQ to C ₂ o-alkyl group, which may be either linear or branched, with alkene oxides. Preference is given to compounds having about 5 to 25 mol of alkene oxide per mole of alkylphenol. Commercially available surfactants of this type are, for example, the ^® Arkopal N grades (Clariant). These surfactants are referred to as alkylphenol alkoxylates, for example alkylphenol ethoxylates.

Zwitterionic surfactants

Typical examples of amphoteric or zwitterionic surfactants are alkyl betaines, alkyl amide betaines, aminopropionates, aminoglycinates, or amphoteric imidazolinium compounds of the formula

R3

R ^{1 is} CON (CH ₂ ) _n N ⁺ -CH ₂ Z

R4 R ²

wherein R ^{1 is} C ₈ -C ₂₂ alkyl or alkenyl, R ^{2 is} hydrogen or CH ₂ CO ₂ M, R ^{3 is} CH ₂ CH ₂ OH or CH ₂ CH ₂ OCH ₂ CH ₂ CO ₂ M, R ^{4 is} hydrogen, CH ₂ CH ₂ OH or CH ₂ CH ₂ COOM, Z is CO ₂ M or CH ₂ CO ₂ M, n is 2 or 3, preferably 2, M is hydrogen or a cation such as alkali metal, alkaline earth metal, ammonium or alkanolammonium. Preferred amphoteric surfactants of this formula are monocarboxylates and dicarboxylates. Examples of these are cocoamphocarboxypropionate, cocoamidocarboxypropionic acid, cocoamphocarboxyglycinate (also referred to as cocoamphodiacetate) and cocoamphoacetate.

Further preferred amphoteric surfactants are Alkyldimethylbetaine ( ^® Genagen LAB / Clariant GmbH) and Alkyldipolyethoxybetaine having an alkyl radical having from about 8 to about 22 carbon atoms, which may be linear or branched, preferably having 8 to 18 carbon atoms and more preferably with about 12 to about 18 carbon atoms.

Suitable cationic surfactants are substituted or unsubstituted straight-chain or branched quaternary ammonium salts of the type R ¹ N (CH ₃ ) 3 ⁺ X ^" , R ¹ R ² N (CH ₃ ) ₂ ⁺ X ^" , R ¹ R ² R ³ N (CH ₃ ) ⁺ X or R ¹ R ² R ³ R ⁴ N ⁺ X ^". The radicals R ^1, R ^2, R ³ and R ⁴ may preferably independently unsubstituted alky! with a chain length between 8 and 24 carbon atoms, in particular between 10 and 18 carbon atoms, hydroxyalkyl having about 1 to about 4 carbon atoms, phenyl, C ₂ - to C ₈ -alkenyl such as tallow alkyl or oleyl, C ₇ - to C ₂₄ -aralkyl, (C ₂ H ₄ O) _x H, where x is from about 1 to about 3 or also be one or more ester groups-containing alkyl radicals or cyclic quaternary ammonium salts. X is a suitable anion.

In addition to the surfactants may be included as further substances: odor absorbers, deodorants, fragrances, antistatic agents, microbicides such as bactericides and fungicides, preservatives, solubilizers, fiber-regenerating substances, seasoning agents, emulsifiers, enzymes, impregnating agents, and water in small quantities.

Examples

For the tests described below, an example of a solvent of formula (1) tetramethoxyethane (TME) of formula (2) was selected. As references were used: Tetrachloroethene (= perchlorethylene, = PER) C ₁₀ _ ₁₃ -lsoalkane (= hydrocarbon solvent, = hydrocarbon)

example 1

The peelability of a stain (Paraffinum liq.) Of various standard test fabrics of the laundry research institute Krefeld was investigated.

The test fabrics used were: cotton wfk 10A, cotton / polyester wfk

2OA, polyester wfk 3OA, polyamide wfk 4OA, polyacryl wfk 5OA, wool wfk 6OA and

Silk wfk 7OA.

These test fabrics were each soiled with paraffin oil which had been dyed with the fat-soluble dye Sudan Red. The remission (whiteness) of the soiled tissues was measured.

The test tissues were then used in a Linitest laboratory washing machine

Tetramethoxyethane and the reference solvents at room temperature.

At the same time, the laundry of each fabric type was not soiled

White fabric of the same type was washed in order to prevent dirt /

To investigate dirt reduction position. After washing, the test fabrics were dried and evaluated as follows.

To quantify the soil release, the remission (whiteness) of the cleaned fabrics was determined and the difference to the measured values of the soiled fabrics formed.

The higher the remission values dR, the better the test soil was removed.

To determine the dirt red position, the L, a, b values of the whitewashed white fabrics before and after the wash were compared and the color difference dE determined therefrom.

The smaller the color difference dE, the smaller the flaps were

Stained dirt transfer (redeposition). Table 1: Removal of paraffin oil by tetramethoxyethane over PER and KWL

Table 2: Soiling of the white fabrics due to dirt redeposition

Example 2

It became the Ablosenvermögen a soiling with vegetable oil of various standard test fabrics of the Laundry Research Institute Krefeld examined. As a vegetable oil sunflower oil was chosen, which also with

Sudan red was dyed.

The test procedure and the evaluation were carried out analogously to Example 1.

Table 3: Tetramethoxyethane removal of sunflower oil from PER and KWL

Table 4: Dewing of white fabrics by dirt redeposition

Example 3

The detergency of tetramethoxyethane compared to PER and KWL was investigated on various standardized test soil fabrics from the Krefeld laundry research institute. The following test fabrics were used: cotton / polyester wfk 2OC (blended fabric with grease pigment soiling) and cotton / polyester wfk 2OD (blended fabric with synthetic skin grease stain). The test fabrics were washed in a Linitest laboratory washing machine at room temperature. At the same time, non-soiled cotton / polyester white fabric wfk 2OA was added to the wash to examine the soil transfer from the soiled to white test fabrics.

The cleaning of the fabrics, the metrological quantification of the cleaning performance and the dirt transfer / graying was carried out as described in Example 1.

Table 5: Cleaning of standard test soil fabrics by tetramethoxyethane over PER and KWL

Table 6: Dewing of the white fabrics by dirt redeposition

Example 4: Stability of textile dyeings

The stability of textile dyeings was tested on various colored commercial fabrics. The color fabrics were:

1. 100% polyamide, turquoise

2. 100% polyester, royal blue

3. 100% polyester, yellow

4. 100% silk, claret

5. 100% silk, dark green

6. 100% viscose, burgundy

7. 100% viscose, black

8. 100% wool, ocher yellow

At room temperature in each case, two lobes of a colored fabric were washed with tetramethoxyethane and the reference solvents at room temperature in the Linitest washing machine together with 4 white lobules of the wfk 2OA test fabric. After 10 minutes, one of the color lobules and two of the white lobules were removed.

The second color patch and the two remaining white lobules were each washed for another 50 minutes.

After drying, the color fabrics and the white fabrics were evaluated as follows.

In order to quantify the color shade and the color content of the colored fabrics, the color difference dE to the unwashed color fabrics was determined. The lower the color differences dE, the less the dyeings are attacked by the cleaning agent.

One possible color transfer by peeled dye was quantified by measuring the color difference dE of the washed white lobules to the unwashed white fabric. The lower the dE value, the lower the white fabrics were stained by the color fabrics. In the ideal path, the dE values are zero for both color retention and color transfer. Table 7: Color retention of various colored textiles after washing with tetramethoxyethane compared to PER and KWL over 10 min.

Table 8: Color retention of various colored textiles after washing with tetramethoxyethane compared to PER and KWL over 60 min.

Table 9: Color transfer to white fabric by washing with colored textiles in tetramethoxyethane compared to PER and KWL over 10 min.

Table 10: Color transfer to white fabric by washing with colored textiles in tetramethoxyethane compared to PER and KWL over 60 min.

Claims

claims:

1. A process for the dry cleaning of textile material, characterized in that the textile material with a compound of formula (1)

(1 )

treated, where

A is (CH ₂ ) _a or phenylene,

R ¹ , R ² , R ³ and R ^{4 are} identical or independently of one another Ci to C ₂ 2-n- and / or iso-

Alkyl, C ₅ or C ₆ cycloalkyl, phenyl-Ci-C ₄ alkyl, CrCg-alkyl-phenyl or phenyl and a is an integer from 0 to 6.

2. The method according to claim 1, characterized in that the textile material is treated with a compound of formula (1), wherein R ¹ , R ² , R ³ and R ^{4 are} identical or independently of one another Ci to C-π-n- and / or iso-alkyl, C ₅ or Cβ-cycloalkyl, phenyl-Ci-C ₂ -alkyl, Ci-Cg-alkyl-phenyl or phenyl and a is an integer from 0 to 2.

3. The method according to claim 1, characterized in that the textile material is treated with a compound of formula (1), wherein R ¹ , R ² , R ³ and R ^{4 are} identical or independently of one another Ci to C ₈ -n- and / or iso-alkyl, cyclohexyl, benzyl or phenyl and a is O or 1.

4. The method according to claim 1, characterized in that the textile material is treated with a compound of formula (1), wherein R ¹ , R ² , R ³ and R ^{4 are} identical or independently of one another Ci to C ₃ -n- and / or iso-alkyl and a is O.

5. The method according to claim 1, characterized in that one uses the compound of formula (1) in the basic cleaning.

6. The method according to claim 1 / characterized in that one uses the compound of formula (1) as part of a spotting agent, cleaning agent or cleaning activator.

7. The method according to claim 1, characterized in that the compound of formula (1) in combination with anionic surfactants, nonionic surfactants, amphoteric surfactants, cationic surfactants, odor absorbers, deodorizers, fragrances, antistatic agents, microbicides such as bactericides and fungicides, preservatives, Solubilizers, fiber-regenerating substances, finishers, emulsifiers, enzymes, impregnating agents, and water used in small quantities.

8. The method according to claim 1, characterized in that treating the textile material with a compound of formula (1), wherein R ¹ , R ² , R ³ and R ^{4 is} methyl and / or ethyl and a is 0.

9. The method according to claim 1, characterized in that the method for the dry cleaning of textiles takes place in the commercial sector.

10. The method according to claim 1, characterized in that the method for the dry cleaning of textiles takes place in the household.

11. The method according to claim 1, characterized in that compounds of formula 1 are used, wherein the radicals R ¹ , R ² , R ³ and R ⁴ contain a different number of C atoms.

12. The method according to claim 1, characterized in that two or more compounds of formula 1 are used, each differing in the number of C atoms contained in them.