EP0230565A1 - Laundry aftertreating agent - Google Patents

Abstract

The present invention relates to a new laundry aftertreatment agent, which is preferably added to the washing machine in the last rinse cycle, consisting of a cationic water-dispersed silicone oil, a cationic fatty acid condensation product and a cation-active film former, the silicone oil can be partially replaced by a paraffin wax and / or an alkoxylated one Can contain fatty amine in an amount of up to 10 wt .-%, based on the silicone content, as well as the method for producing this agent. This agent makes ironing easier, gives the ironed laundry a slight finish, increases the absorbency of the laundry against water and gives the laundry a soft and fluffy feel.

Description

The invention relates to a laundry aftertreatment agent serving in particular as an ironing aid.

It is known to use an aqueous dispersion of a water-insoluble lubricant, in particular a silicone oil, and a water-soluble film former, in particular a water-soluble starch derivative, as an ironing aid for laundry, in particular of cotton. This dispersion is sprayed onto the laundry to be ironed and enables the iron to slide more easily than an untreated laundry, the film former imparting a certain stiffness to the ironed laundry, which is particularly desirable for shirts and blouses.

Spraying the laundry using a spray can is expensive, however, and is therefore mainly limited to use with shirts and blouses. In addition, the sliding effect achieved with the known dispersion described above is still not entirely satisfactory. It is also difficult to spray the tissue evenly without completely soaking it. This can lead to undesirable stains or margins on the fabric. Another disadvantage is that the spray can often cannot be completely emptied despite a complex spray mechanism.

The invention has therefore set itself the object to provide a fabric conditioning composition for easy ironing to _Ver - to provide addition, which is compared to the above-described known ironing aid by an increased _Gl EIT effect an even easier ironing permitted and cost-saving in the application.

This object is achieved by the laundry aftertreatment agent according to claim 1, which is preferably introduced in the last rinse cycle in the washing machine, so _that the use of costly spray cans is omitted.

However, the laundry aftertreatment agent according to the invention not only causes a higher sliding effect than the known ironing aid described above, but also increases the absorbency of the fabric against water and gives the fabric a soft, fluffy feel, while also giving the ironed laundry a slight finish. This effect of the laundry aftertreatment agent according to the invention is surprising insofar as it has hitherto been considered impossible to achieve the combination of the properties described above, in particular the combination of a fluffy feel with the absorbency of the fabric against water. To achieve a fluffy feel, so-called fabric softeners, which contain quaternary ammonium bases with long-chain alkyl radicals as active ingredients, have hitherto been used. This added to the final rinse cycle of the washing machine means give the laundry, especially terry goods and hosiery, soft to the touch, but they are, despite some _B ügelerleichterung over untreated wash for the treatment of ironing unsuitable. A serious disadvantage of the fabric softener is its hydrophobic effect on textile fabrics, especially on cotton, combined with a strong reduction in the absorbency of the laundry.

The laundry aftertreatment agent according to the invention is therefore not only an improved ironing aid compared to the known ironing aid, but at the same time a means by which the body and the handle the laundry is improved while at the same time achieving a softening effect without the absorbency of the treated laundry being impaired. In addition, the laundry aftertreatment agent according to the invention enables ironing of dry laundry, an even better sliding effect being achieved compared to moistened laundry. Only with stubborn creases it is necessary to slightly dampen the laundry. There are also no disadvantages when using steam irons. As is known, a steam iron cannot be used for ironing laundry which has been treated with the known ironing aid described above.

In DE-OS 26 31 419, a fabric conditioning composition, the ^g also in the last Spülgan is a washing machine can be introduced, described that a silicone oil has in common with the inventive fabric conditioners use, in the known case, however, are not alkoxylated starches and celluloses used, in their use according to the invention surprisingly not only the bulk and the lubricity, but also the absorbency of the treated tissues are increased. In the known case, roasted dextrins are used which only act as thickeners.

In addition, fatty acid amides are used according to the invention in contrast to the use of fatty acid amines in the known case. These require less dirt reduction and are easier to hydrolyze than amines and are therefore easier to wash out. They are also more easily degradable and therefore more environmentally friendly than the amines used in the known case.

The cationic water-dispersed silicone oil _(K omponen- te A)) is a textile relevant silicone oil having a viscosity 500-5 ₀₀₀₀ mm ² s ^-1 at 25 ° C, in particular 1000 to 10000 mm ² s ^-1 at 25 ° C as it is described, for example, in "Textilveredelung", 19, (1984) No. 5 on pages 144 to 145. In particular, alkyl silicone oils, very particularly methyl silicone oil with a viscosity of 1,000 to 10,000 mm ² s ^-1 , are suitable.

_V orzugseise laundry after-treatment agent of the invention as a partial replacement for the silicone oil, a paraffin wax may contain, preferably having a melting point ≧ 40 ° C and especially from 50 to 60 ° C possesses.

worin bedeuten:

• R₁ = H
• R₂ = R₁ = -CH₂CH₃
• m = 2 bis 3
• n = 1 bis 2
• M = ₅₀ bis 2000
• N = 0,1 bis 2 % Stickstoff

An amino-functional siloxane which preferably corresponds to the present formula can also be used as the silicone oil of component A)

in which mean:

• R ₁ = H
• R ₂ = R ₁ = -CH ₂ CH ₃
• m = 2 to 3
• n = 1 to 2
• M = ₅₀ to 2000
• N = 0.1 to 2% nitrogen

n = 50 bis 2000
m richtet sich nach dem Stickstoffgehalt von 1 bis 4 %. Vorzugsweise besitzt dieses quaternäre Siloxan, das sich als Polysiloxan-dimethylalkylammoniumacetat-Copolymeres bezeichnen läßt, in einer 30 %igen wäßrigen Lösung eine Dichte bei 20°C von 1,053 g/cm³ und eine Viskosität bei 20°C von 60 bis 100 mPas, während der pH-Wert einer 30 %igen Lösung 6 bis 7 beträgt.Furthermore, the silicone oil of component A) can be a quaternary siloxane, which preferably corresponds to the following formula

n = 50 to 2000
m depends on the nitrogen content of 1 to 4%. This preferably has quaternary siloxane, which is a polysiloxane-dimethylalkylammonium acetate copolymer denotes in a 30% aqueous solution a density at 20 ° C of 1.053 g / cm ³ and a viscosity at 20 ° C of 60 to 100 mPas, while the pH of a 30% solution is 6 to 7.

In addition, the silicone oil of component A) can consist of a silicone elastomer as described in "Textilpraxis International", (1983), December on pages 1342 to 1343. A component of the substances mentioned can also be used as component A).

worin bedeuten:

• R₁ = Alkyl oder Alkylen mit 9 bis 21 Kohlenstoffatomen
• R₂ = -
  
  -R1 oder Wasserstoff
• R₃ = Wasserstoff oder Methyl
• m = 1 bis 4
• n = 0 bis 3.

Component B), namely the fatty acid condensation product, is a condensation product from an aliphatic longer-chain, in particular C ₁₀ -C ₂₂ - _' saturated or unsaturated monocarboxylic acid with a polyamine or an addition product from a polyamine with ethylene oxide or propylene oxide. This condensation product preferably corresponds to the formula

in which mean:

• R ₁ = alkyl or alkylene with 9 to 21 carbon atoms
• R ₂ = -
  
  -R1 or hydrogen
• R ₃ = hydrogen or methyl
• m = 1 to 4
• n = 0 to 3.

In particular, stearic acid or oleic acid come as monocarboxylic acids and diethylenetriamine comes as polyamine. and diethylenetriamineethanolamine in question.

The component C) is a cation-active alkoxylated ._ starch, as is described, for example, in the _E-PS 21 55 941, or a cation-active alkoxylated cellulose.

worin bedeuten:

• R = H oder CH3
• m = 1 bis 3
• n = 0 bis 3

The cationic alkoxylated starch preferably corresponds to the formula

in which mean:

• R = H or CH3
• m = 1 to 3
• n = 0 to 3

The alkoxy content is preferably between 4 and 10% and the nitrogen content between 0.1 and 0.5 _% .

worin R³ ein langkettiger Kohlenwasserstoffrest, der gesättigt oder ungesättigt sein kann und insbesondere 10 oder mehr Kohlenstoffatome aufweist, ist, R⁴ Wasserstoff oder einen Alkylrest, insbesondere mit 1 bis 5 Kohlenstoffatomen, wobei der Alkylrest substituiert und insbesondere an seinem Ende einen Hydroxyrest tragen kann, bedeutet, R⁵ ein niederer Alkylrest, insbesondere ein C₁-C₄-Alkylrest, ist, X ein anionischer Rest, vorzugsweise Halogenidrest, oder eine anionische Gruppe, insbesondere die Gruppe

worin R⁶ für eine C₁-C₄-Alkylgruppe steht, oder die Acetatgruppe ist. Das kationaktive Dispergiermittel wird vorzugsweise in einer Menge von 2 bis 10 %, bezogen auf den Siliconanteil verwendet.The cationic dispersant for the silicone oil of component A) can be any cationic emulsifier. Particularly preferably, the invention provides a cation-active midazoliniumsalz _I, especially a compound of formula

wherein R ^{3 is} a long-chain hydrocarbon radical which may be saturated or unsaturated and in particular has 10 or more carbon atoms, R ^{4 is} hydrogen or an alkyl radical, in particular having 1 to 5 carbon atoms, the alkyl radical being substituted and in particular having a hydroxyl radical at its end , R ^{5 is} a lower alkyl radical, in particular a C ₁ -C ₄ alkyl radical, X is an anionic radical, preferably a halide radical, or an anionic group, in particular the group

wherein R ^{6 represents} a C ₁ -C ₄ alkyl group, or is the acetate group. The cationic dispersant is preferably used in an amount of 2 to 10%, based on the silicone content.

Component A) also contains an alkoxylated, in particular ethoxylated, fatty amine in an amount of up to 10% by weight, based on the silicone content.

The laundry aftertreatment agent according to the invention preferably contains component A) in an amount of 0.5 to 20% by weight, in particular 3 to 8% by weight, component B) in an amount of 0.5 to 15% by weight, in particular 2 to 8% by weight, and component C) in an amount of 1 to ₁₅ % by weight, in particular 2.5 to 7.5% by weight. -; (Rest of water).

In addition, the laundry aftertreatment agent according to the invention preferably contains fragrances, preservatives, dyes and organic acids, in particular organic aliphatic carboxylic acids, such as acetic acid or citric acid, for setting a pH of preferably 3 to 5.

The components of the laundry aftertreatment agent according to the invention are distinguished by a relatively high substantivity to the textile fiber, i.e. they draw from a cold and long liquor, in particular onto cotton, so that the laundry aftertreatment agent according to the invention is particularly suitable for treating laundry consisting of cotton or laundry containing a proportion of cotton.

Since the components of the laundry aftertreatment agent according to the invention can easily be washed out again, there is no danger that they will accumulate on the fibers when the agent is used repeatedly and thus affect the laundry properties.

Furthermore, the laundry aftertreatment agent according to the invention does not cause increased re-soiling of the treated laundry, nor does it promote laundry yellowing, which can occur in the case of conventional softeners.

The laundry aftertreatment agent according to the invention is expediently added to the last rinse after the washing process in an amount of 50 to 80 grams, the water volume of the last rinse being about 20 liters.

The laundry aftertreatment agent according to the invention can be produced by the following two methods:

Method I

_C ation-active alkoxylated starch is dispersed in water. This dispersion is heated to 80 to 90 ° C. with vigorous stirring, giving a moderately viscous, clear solution. The mixture is then cooled to 20 to 25 ° C. and the solution is mixed with the cationic fatty acid condensation product, dispersed in water. Once a uniform dispersion is obtained, the silicone oil dispersion dispersed with a cationic disperser is carefully added with slow and vigorous stirring. The dispersion is adjusted to an acidic pH using an acid. Finally, dye, fragrance and a preservative are added.

Method II

The starch solution is prepared in the manner described above. The cationic fatty acid condensation product in pure solid form is added to the solution heated to 90 ° C. with vigorous stirring. The mixture is stirred until a stable dispersion has formed. Then it is cooled to 20 to 25 ° C and proceed as described above.

example 1

This example describes a recipe with which a laundry aftertreatment agent according to the invention is produced according to method _I.

₁ ) Approx. 50% aqueous dispersion of an approx. 1: 1 mixture of a dimethylpolysiloxane with a viscosity of approx. 5000 mm ² · s ^-1 and a paraffin wax with a melting range of 50 to 55 ° C, emulsified with a dioleylimidazolinium sulfate and one Cocosamine ethylene oxide adduct with 5 to 10 moles of ethylene oxide 6.00 parts by weight

2) Approx. 30% dispersion of a propylaminoethylamine dimethylpolysiloxane with an amine number of 0.1 to 0.5 cationically emulsified with dioleylimidazolinoium sulfate and cocosamine ethylene oxide adduct with 5 to 10 moles of ethylene oxide, 4.50 parts by weight

3) Approx. 20% aqueous dispersion of distearic acid dipropylenetriaminethanolamine condensate 10.00 parts by weight, adjusted to pH 3 with acetic acid

4) Hydroxypropyltrimethylammonium chloride-hydroxypropyl starch ether with an N content of approx. 0.25% and a propoxy content of approx. 7% 7.50 parts by weight

5) dye, fragrance, preservative 0.20 parts by weight

6) water 71.80 parts by weight

The p _H of this drug is approximately 4. It is a low-viscosity milky-looking dispersion having a viscosity of about 120 mPas.

Example 2

• 1) wie Beispiel 1 (Silicon/Wachs-Mischung) 6,20 Gew.-Teile
• 2) _Di-stearinsäurediethylentriaminkondensat (Fp: ca. 90°C) 3,25 Gew.-Teile
• 3) wie 4) in Beispiel 1 (Stärkeether) 5,00 Gew.-Teile
• 4) Zitronensäuremonohydrat 3,00 Gew.-Teile
• 5) Farbstoff, Duftstoff, Konservierungsmittel 0,20 Gew.-Teile
• 6) Wasser 82,35 Gew.-Teile

Using the method II, a laundry treatment agent according to the invention is produced according to the following recipe:

• 1) As example 1 (silicone / wax mixture) 6.20 parts by weight
• 2) _D i-stearic acid diethylenetriamine condensate (mp: approx. 90 ° C.) 3.25 parts by weight
• 3) as 4) in Example 1 (starch ether) 5.00 parts by weight
• 4) Citric acid monohydrate 3.00 parts by weight
• 5) Colorant, fragrance, preservative 0.20 parts by weight
• 6) water 82.35 parts by weight

The pH of this agent is 3 to 4. It is a thin, milky-looking dispersion with a viscosity of approx. 80 mPa · s.

Example 3

Determination of the ironing values:

Using the composition prepared in Example 2, that is g added to a conventional home washing machine in an amount of 50 to 80 the last rinse cycle, are garments made from cotton and cotton / polyester _- the previously washed using a conventional detergent at 95 ° C blended fabric, were treated to determine the stirrup values.

The ironing test is carried out as follows:

An iron with a temperature of 200 + 10 ° C is pulled over the test fabric with constant tensile force that can be adjusted by weights along a constant measuring path. This sliding test breaks down into two phases, namely the "ironing" of the fabric adjusted to 30% moisture and the "final ironing" of the dry smooth fabric.

For comparison purposes, untreated fabric and fabric treated with a conventional ironing aid were subjected to the ironing test. The results obtained are summarized in Table 1 below.

The ironing values for the untreated fabric fluctuate around the mean values given in the table by + 10%. This applies in particular to the sliding values. The cause is to be found in the non-uniformity of the surface roughness of the fabric. Determined the "ügelhilfe _B" and the agents of the invention, significantly lower bracket values indicate a substantially lower fluctuation (maximum 5%), since due to the decreasing surface roughness of the treated tissue, reproducibility is improved.

Example 4

Determination of the washability of the agent according to the invention:

_W mullet samples of 100% cotton fabrics are each treated g according to Example 2 in the last rinse cycle in an amount of 80 5 or 6 times at 95 ° C and 60 ° C using washed a conventional detergent and adding the fabric conditioning composition of the invention.

For comparison purposes, untreated items of laundry washed in the same way and with "ironing aid" are used traded laundry tested. The ironing test is used as the test method. The mean values, which are recorded in the attached FIGS. 1 and 2, are formed from 6 individual sliding tests.

1 and FIG. 2 represent the tensile force extrapolated at the same time t = 10 s of cotton fabric washed and post-treated or not post-treated at 95 ° C. (5 times) or 60 ° C. (6 times).

As shown in FIGS. 1 and 2, surprisingly, with the first repetition of the after-treatment, an ironing value arises that deviates only slightly from the smoothness value of the first after-treatment.

It can be seen from this that the laundry aftertreatment agent according to the invention can be washed out of the laundry sample both when washing at 95 ° C. and when washing at 60 ° C. There are therefore no adverse addition effects when using the laundry aftertreatment agent according to the invention.

Example 5

Determination of bulk (fullness):

_F roteetücher (100% cotton) were washed in a conventional manner and in the final rinse again with the agent of Example 2 in a concentration of 50 to 80 g / 20 liters and once for comparison to a conventional fabric softener (on the basis of distearyl dimethyl ammonium chloride) in treated with the same concentration. Untreated terry towels are also used for comparison purposes. A total of 15 terry towels are washed twice at 60 ° C. After air drying on a clothes horse, the terry towels of the three test groups are stacked separately. Stack heights are determined after 10 minutes and the results are shown in Table II.

The height of the stack is a measure of the bulkiness of the terry towels and the loosening of the individual fibers. The agent according to the invention surprisingly brings about an even greater stack height than the known plasticizer.

Example 6

Determination of absorbency (drying capacity)

The absorbency is a measure of the absorption capacity of moisture from textile fabrics (terry cloth). The absorbency is determined using the rising height method according to DIN 53294. The _{3 cm} wide and 25 cm long cotton strips (100% cotton fabric, not equipped, with a basis weight of ₁₄₀ g / m ² ) are immersed at one end in detilled water, which due to the capillary forces in the fabric more or less depending on the absorbency rises high. The climbing heights after a test period of 5 minutes are shown in Table III.

Wie die vorstehende Tabelle III zeigt, wird durch das erfindungsgemäße Mittel die Saugfähigkeit gegenüber einer unbehandelten Gewebeprobe fast erreicht.

As shown in Table III above, the absorbency compared to an untreated tissue sample is almost achieved by the agent according to the invention.

Claims (5)

1. Laundry treatment agent consisting of A) an aqueous dispersion of a silicone oil from the group of textile-relevant silicone oils with a viscosity between 500 and 50,000 mm ² s ^-1 at 25 ° C, the amino-functional siloxanes, the quaternary, which is prepared with the aid of a cationic dispersant and which may be partially replaced by a paraffin wax Siloxanes, the silicone elastomers and the mixtures of these substances, an alkoxylated fatty amine optionally being present in this component in an amount of up to 10% by weight, based on the silicone content. B) a condensation product of an aliphatic longer-chain saturated or unsaturated monocarboxylic acid with a polyamine or an addition product of a polyamine with ethylene oxide or propylene oxide, C) a cationic film former from the group of the cationic alkoxylated starches and the cationic alkoxylated celluloses, D) water and E) further additives from the group of fragrances, preservatives, dyes and organic acids suitable for adjusting the pH. 2. Composition according to claim 1, characterized in that component A) is a textile-relevant silicone oil with a viscosity between 1000 to 10000 mm ² s ^-1 at 25 ° C. 3. Composition according to claim 2, characterized in that the silicone oil is an alkyl silicone oil, in particular a methyl silicone oil with a viscosity of _1,000 to 10,000 mm ² s ^-1 . _4th Agent according to one of claims 1 to 3, characterized in that the cationic dispersant for component A) is a cationically active imidazolinium salt of the formula

in which R ^{3 is} a long-chain, saturated or unsaturated hydrocarbon radical having 10 or more carbon atoms, R ^{4 is} hydrogen or an optionally substituted alkyl radical having 1 to 5 carbon atoms, R ^{5 is} a lower alkyl radical and X is an anionic radical or an anionic group is. 5. Composition according to one of claims 1 to 4, characterized in that, based on the entire product, component A) in an amount of 0.5 to 20 wt .-%, component B) in an amount of 0, 5 to 15 wt .-% and component C) in an amount of 1 to 15 wt .-%, the rest of water.

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