DE2242541A1 - Low-foam washing, cleaning and water-softening compsns - contg, foam-suppressing synergistic combination of higher acetals, ketals or mercaptals with higher ketones - Google Patents

Abstract

Title compsn. contg. anionic, hybrid-ionic or non-ionic surfactants, polymeric phosphates, complex-forming cpds. and a foaming-controlling agent selected from acetals, ketals and mercaptals having the general formula (in which R1 and R2 are H or 1-24C hydrocrbon; R3 and R4 are 1-48C hydrocarbon or together form a ring; X is O or S; m = 0-1; n = 0-6; with the proviso that R1-4 are >=30C) according to the Parent Patent is improved in that 5-95 wt.% (pref. 15-85 wt.%) of the above foam-suppressing agent(s) is replaced by a ketone(s) contg. 11-23C alkyls (pref. laurone, myristone, palmitone or higher ketone mixts), so that the content of the above acetals, ketals and/or mercaptals is 0.1-5 wt.% (esp. 0.2-3 wt.%) w.r.t. the total solid components. A synergistic foam-suppressing effect is achieved.

Description

"Low-foaming detergents, cleaning and softening agents" addendum to patent application P 21 32 898.3 (D 4266) The subject of the German patent (patent application P 21 32 898.3) is foam-regulated washing, cleaning and softening agents with a content of at least one detergent or compounding agent acting compound from the class of anionic, zwitterionic and nonionic washing active substances, polymer phosphates and complexing agents, characterized in that, based on the amount of the aforementioned cleaning or complexing compounds, 0.1 to 10% by weight of at least one foam-suppressing compound of the class of acetals, ketones and mercaptals contains the following formula: in which R1 and R2 represent hydrogen or hydrocarbon radicals with 1 to 24 carbon atoms, dic radicals R3 and R! 1 and n stand for 0 to 6 and in which the sum of the carbon atoms contained in the radicals R1, R2, R3 and R4 should be at least 30.

It has now been found that the foam-inhibiting effect is still achieved can increase if, in addition to the foam inhibitors according to the main application even higher molecular weight ketones applies or a part of the foam inhibitors replaced by ketones. The present invention is therefore weak foaming detergents, cleaning agents and softeners according to patent (patent application P 21 32 898.3), characterized in that 5 to 95 wt .-%, preferably 15 to 85 wt .- * of the foam-inhibiting acetals, ketals and mercaptans due to ketones are replaced, the alkyl radicals of which each contain 11 to 23 carbon atoms.

Suitable ketones are those with branched, but in particular straight chain alkyl groups, e.g. Lauron, Myriston, Palmiton, Stearon, Arachinon and Behenone, also ketones, whose alkyl radicals have a different number of carbon atoms have as well as mixtures of ketones with different carbon numbers. Such Mixtures are natural, for example, by ketoning fatty acid mixtures Origin, such as coconut and tallow or hardened rapeseed oil or fish fatty acids available.

The foam inhibitors according to the main application and the synergistic ones Ketones can be added to the detergents individually or as mixtures. The maximum the synergistic effect is in the range of a mixing ratio of 15: 85 to 85:15, especially in the range of about 30:50. Particularly practical Mixtures of ketals and ketones are of interest, as one is involved in their production only partially needs to acetalize the ketones used as starting materials.

The ones to be used in detergents, cleaning agents and detergents Amounts of synergistic foam inhibitor mixtures depend on the Amount of foaming or detergent substance as well as according to the size the desired effect. The application concentration, which is important for practice, is sufficient from 0.1 to 5, preferably 0.2 to 3% by weight, based on the solid substance. It is possible to work with amounts larger than 5 wt .-%, but this is in the Practice usually not required.

A particular advantage of the combination of foam inhibitors according to the invention can be seen in the fact that they are also used in extremely soft water, for example with those of 30 dH and less, as well as in the simultaneous absence of soap are very effective. It was known from DOS 1 467 613 of the applicant that that ketones also have a good foam-suppressing effect in detergents. However, this effect is lost in the absence of soaps - in very soft water.

The synergistically acting sleep suppressants according to the invention can be used with the other detergents, cleaning agents and encrusting agents in the usual way Mixed in a way and processed together with them, e.g. spray-dried or granulated or by other known processes into solid, liquid or pasty mixtures be convicted. One can also use the compounds in molten or dissolved form Enormously with the other ingredients of the Mix or spray or granulate agents.

These other ingredients consist of at least one washing agent or a complexing compound from the class of anionic, nonionic or zwitterionic surfactants, polymer phosphates and complex . respectively.

Chelating agents. In addition, other nielite surface-active Building salts, oxygenated lead clots and other usually additives contained in such agents be present. These mix ingredients and their composition are listed in the main application.

Examples The following foam inhibitors, designated S1 to S6, were used used: S1 = stearon-propylene- (1,2) -ketal S2 = stearon-butylene- (1,3) -ketal 83 = Formaldehyde di-octadecyl acetal S4 = acetaldehyde di-hexadecyl mercaptal S5 = stearon 6 = ketone from hardened tallow fatty acids (C14-C18) A soap containing one was used and a soap-free laundry detergent with the following composition (% by weight solids) A B Na-n-dodecylbenzenesulfanate 7.5 7.5 Tallow fatty alcohol, 10 times ethoxylated 2.5 2.5 Na soap (tallow coconut 5: 1) 2.5 pentasodium triphosphate 40.0 40.0 sodium silicate (Na2O: SiO2 = 1: 3.3) 3.5 3.5 EDTA (Na salt) 0.3 0.3 Sodium perborate tetrahydrate 25.0 25.0 Na carboxymethyl cellulose 1.5 1.5 Magnesium silicate 1.5 1.5 Foam inhibitor, Sodium sulfate remainder remainder The proportion of foam inhibitors is shown in Table 1.

The foam behavior was fully automated in a commercially available Washing machine with horizontally mounted drum depending on the washing temperature checked.

The machine was equipped with a round sight glass through which the foam level could be observed. For the evaluation of the foam height were award the following grades: Grade Maximum foam level O no foam 1 1/4 of the sight glass 2 1/2 of the sight glass 3 3/4 of the sight glass 4 4/4 of the sight glass 5 Foam visible in the filler neck 6 Foaming over The washing machine was started with 3 kg of clean laundry loaded.

The detergent concentration was 5 g / l, the weight ratio from textile to washing liquor 1:15. The degrees of hardness of the water were in German degrees of hardness indicated (10 dH corresponds to 1 mg CaO in 100 ml water).

The results are shown in Table 1.

The comparative experiments are denoted by letters, the examples according to the invention with numbers. In the absence of foam inhibitors, the washing liquor became excessively acidic in the total temperature range of both detergents. Foam wash ° dH foam height at Ex. inhibitor medium 30 50 70 90 95 ° C A 1% S1 A 3 4 3 1 3 5 B 1% S1 B 3 4 3 4 6 6 C 1% S2 A 3 3 1 1 2 3 D 1% S2 B 3 3 1 2 5 5 E 1% S3 A 3 3 1 1 3 4 F 1% S3 B 3 3 3 5 5 5 G 1% S4 A 3 3 1 1 2 4 H 1% S4 B 3 4 4 3 5 5 J 1% S5 A 3 4 4 1 3 4 K 1% S5 B 3 4 6 6 6 - L 1% S6 A 3 4 3 2 2 4 M 1% S6 B 3 4 6 6 6 - 1 0.5% S1 A 3 4 1 1 2 3 0.5% S5 2 0.5% S1 B 3 4 1 2 2 4 0.5% S5 ' 3 0.85% S2 A 3 1 1 0 - 2 3 0.15% S5² 4 0.5% S2 A 3 1 0 0 0 1 0.5% 5 0.85% S2 B 3 2 1 2 4 4 0.15% S5 6 0.5% S2 B 3 3 1 1 1 2 0.5% S5² 7 0.15% S2 B 3 4 1 1 3 4 0.85% S5² 8 0.5% S3 A 3 3 1 0 1 2 0.5% S5 9 0.5% S3 B 3 3 3 1 1 4 0.5% S5 10 0.5% S4 B 3 4 1 1 2 4 0.5% S5 Foam washing ° dH foam height for example.

inhibitor medium 30 50 70 90 95 ° C 11 0.5% S2 A 3 2 0 0 1 2 0.5% S6 12 0.5% S2 B B 3 2 1 1 2 3 0.5% S6² 13 0.5% S2 A 16 1 0 0 0 1 0.5 $ 14 0.5 % So 13 16 1 0 0 1 2 0.5% S6² 15 0.2% S2 A 16 2 1 1 2 3 0.2% S6² The results show that the foam by the combination according to the invention, especially in the for foam dampening particularly critical area of low water hardness, more effective is attenuated than by the individual connections.

Claims (4)

P a t e n t a n s p r ü c h e 1. Low foaming detergent, cleaning agent and softener according to Patent .......... (patent application P 21 32 898.3), characterized in that 5 up to 95% by weight, preferably 15 to 85% by weight of the foam-inhibiting acetates, Ketals and mercaptals have been replaced by ketones whose alkyl radicals are 11 to each Contains 23 carbon atoms. 2. Means according to claim 1, characterized in that the total amount of foam-inhibiting acetates, ketates, mercaptals to be used and ketones 0.1 to 5, in particular 0.2 to 3% by weight, based on solid substance, amounts to. 3. A method for producing the agent according to claim 3 and 2, characterized characterized in that the foam inhibitors with the oil powder and / or granules present other constituents of the means or a part thereof mixed. 4 The method according to claim 3, characterized in that the foam inhibitors on the other ingredients present as powder or granulate or one Part of the same sprayed or granulated.