DE1054635B - Synthetic detergent - Google Patents

Description

GERMAN

The soap-based detergents form insoluble compounds in hard water. In general is this because of the loss of soap and the deposition of these compounds on the fiber (higher Ash content after washing many times) a disadvantage.

However, there are also some advantages associated with this precipitation of insoluble compounds. So it is an advantage that this precipitate is also on the metal wall of washing kettles and Washing machines forms and acts as a protective layer against corrosion.

The synthetic detergents generally form these insoluble compounds with the Hardness components from the water, or at least to a much lesser extent. This is generally a Advantage, but to that extent no protective layer on the metal of washing kettles and washing machines is formed or the protective layer is loosened on it, this is to be regarded as a disadvantage, because it corrodes these washing kettles and washing machines. Especially with galvanized. Washing kettles and galvanized sub-parts, this has the great disadvantage that the protective zinc layer or zinc alloy layer disappears and rust develops.

Rusted washing kettles and washing machines with rusted bases are of course very harmful for the laundry, because this causes rust stains on the laundry and, as a result, holes easily caused by bleaching can. The phenomenon of corroding metals and especially galvanized metals occurs particularly strong in synthetic detergents, which polymeric phosphates such. B. tripolyphosphate, contain. If these detergents also contain perborate, it is corrosive Effect many times greater.

Corrosion takes place to a greater extent in relatively soft water (4 ° dH.) Than in hard water instead of.

Surprisingly, it has now been found that the corrosive effect of synthetic detergents can greatly reduce if these detergents 0.01 to 10%, preferably 0.2 to 2%, of a titanium and / or zirconium salt with titanium or zirconium as a cation.

Although synthetic detergents are detergents, their washing-active substance consists of non-soaps, a small amount of soap may be present in the detergent according to the invention.

The titanium salt or zirconium salt used is preferably well-soluble salts, such as titanium sulfate, titanium nitrate, Titanium chloride, titanyl salts, e.g. B. titanyl sulfate, etc., zirconium sulfate, zirconium chloride, zirconium nitrate, etc., on.

Synthetis this detergent

Applicant: Koninklijke Dobbelman N.V., Nijmegen (Netherlands)

Representative: Dipl.-Ing. F. Weickmann and Dr.-Ing. A. Weickmann, Patent Attorneys, Munich 2, Brunnstr. 8/9

* 5 Claimed priority:

Netherlands of March 27, 1957

Drs Dirk van den Bosch, Nijmegen (Netherlands), has been named as the inventor

An even greater improvement is obtained if, in addition to the titanium salt or zirconium salt, 0.1 to 10%, preferably up to 6%, magnesium salts such as Mg SO ₄ , Mg Cl ₂ , magnesium silicate, Mg (NO ₃ ) ₂ are added to the synthetic detergent, whose addition to detergent is known per se.

Example I.

A synthetic detergent of the so-called "heavy-duty" type based on alkylarylsulfonate 1% titanium salt is added.

The composition of the detergent is then:

Dodecyl benzene sulfonate 20%

Fatty acid amide condensate 3%

Polyphosphates 40%

Silicate 6%

C M. C 1%

Sodium sulfate 12%

Magnesium sulfate 4%

Titanium sulfate 1%

Sodium perborate 4aq 8%

opt. active dye 0.06%

Water 5%

The corrosive influence on zinc is determined by the fact that the weight loss per m ² of zinc flakes after a number of boilings in the washing water of the synthetic detergent is

809 '789/483

Claims (3)

> · .; 1 0.5 •; . 3 true. The results of these determinations are shown graphically in curve I in the drawing. Example Ia Synthetic laundry detergents of the same composition as in Example I, but the titanium sulfate has been replaced by zirconium nitrate. The corrosive effect can be seen from curve I a. Example II A synthetic heavy duty detergent Based on alkyl aryl sulfonate, but without the addition of magnesium compounds, ϊ% titanium salt is added. The composition of the detergent is then: Dodecyl benzene sulfonate 10% cetyl oleyl sulfate 10% fatty acid amide condensate 3% polyphosphate 40% silicate 6% CM. C 1% sodium sulfate 16% titanium sulfate 1 %> Sodium perborate 8% · optically active dye 0.06%. Water 5% The corrosive effect of this composition is shown in curve II. Example IIa The same composition as in Example II, but zirconium nitrate is used instead of titanium sulfate 635,: 4 .- To explain the diagram, the fact that there "the wt Loss of light in the zinc platelets in grams per m2 with regard to the number of boilings in the washing water of the synthetic detergent is shown. 5- The hardness of the water was 9 ° dH. In the. On the "blank" curve, no titanium salt has been added to the synthetic detergent. The curves I, I a, II and II a indicate the weight loss with the compositions according to ίο Examples I, la, II and IIa. This shows that the addition of titanium salt and / or zirconium salt significantly reduces the corrosive effect of the detergent. The difference between curves I and I a on the one hand and II and 11 a on the other hand "shows that 'the effect of titanium sulfates and zirconium nitrate is still significantly supported by the presence of magnesium compounds. 1. Synthetic detergent with reduced corrosive properties, which if necessary contains a minor amount of soap and preferably polyphosphate, characterized in that that it is 0.01 to 10%, preferably 0.2 to 2%, of a non-complex tetravalent titanium salt and / or contains zirconium salt. 2. Synthetic detergent according to claim 1, characterized in that it contains 0.01 to 10%, preferably 0.2 to 2%, titanium sulfate, titanium nitrate, zirconium sulfate and / or zirconium nitrate. 3. Synthetic detergent according to claim i or 2, characterized in that it also still contains magnesium compounds. 1 sheet of drawings ®mmtm 3.59