EP0058751B1 - Use of n-oxyalkylated derivatives of aniline as polymer dissolving components in floor cleaning compositions - Google Patents

Description

(hergestellt durch Anlagerung von 2 Molen Ethylenoxid an Anilin ohne Kontaktzugabe) eingesetzt (W. E. Draper, L. P. Johnson, Soap & Chemical Specialties Januar 1971, Page 38 bis 44, 74 und 75). Dieses Produkt hat den Nachteil, daß es sich selbst und auch die zu reinigenden Oberflächen, wie Stein, Holz, Kunststoffe und lackierte Oberflächen, nach einer gewissen Zeit blau verfärbt. Diese Blaufärbung ist unangenehm, weil dadurch die ursprüngliche Farbe blaustichig wird. Bedingt durch die Reinigung ist diese Blaufärbung nicht einheitlich, sondern führt zu mehr oder weniger starken Einfärbungen. Spritztropfen, die nicht entfernt werden, ergeben tiefblaue Farbpunkte. Diese Blauverfärbungen lassen sich nur sehr schlecht oder gar nicht mehr entfernen.N-phenyldiethanolamine is mainly used to dissolve the polymers in floor cleaning agents (self-wax wax removal)

(prepared by adding 2 moles of ethylene oxide to aniline without adding any contact) (WE Draper, LP Johnson, Soap & Chemical Specialties January 1971, Page 38 to 44, 74 and 75). The disadvantage of this product is that it turns itself and the surfaces to be cleaned, such as stone, wood, plastics and painted surfaces, blue after a certain time. This blue color is unpleasant because it makes the original color bluish. Due to the cleaning, this blue coloring is not uniform, but leads to more or less intense coloring. Splashes of drops that are not removed result in deep blue color dots. These blue discolorations can only be removed very poorly or not at all.

in der R₁ und R₂ Wasserstoff oder die NH₂-Gruppe oder niedere Alkylgruppen mit 1 bis 4 C-Atomen bedeuten, jedoch nicht gleich sein müssen, R₃ für Wasserstoff oder eine niedere Alkylgruppe mit 1 bis 4 C-Atomen, R₄ für Wasserstoff oder die Methylgruppe und n für Werte von 1,0 bis 5,0 steht, als polymerlösende Komponente in Fußbodenreinigungsmitteln.It has now been found that these disturbing blue stains do not occur when using N-oxyalkylated derivatives of the aniline of the general formula

in which R ₁ and R ₂ denote hydrogen or the NH ₂ group or lower alkyl groups with 1 to 4 C atoms, but need not be the same, R ₃ for hydrogen or a lower alkyl group with 1 to 4 C atoms, R ₄ represents hydrogen or the methyl group and n stands for values from 1.0 to 5.0, as a polymer-dissolving component in floor cleaning agents.

in der n einen Wert von 1 bis 5, insbesondere von 1 bis 3, annimmt.Compounds of the general formula are preferably used

in which n assumes a value from 1 to 5, in particular from 1 to 3.

The following N-oxalkylated derivatives of aniline can thus be used according to the invention as a polymer-dissolving component in floor cleaning agents: reaction products of o-toluidine, p-toluidine, p-phenylenediamine, N-methylaniline with the corresponding number of moles of ethylene oxide and / or propylene oxide, preferably reaction products of Aniline with the corresponding mole number of ethylene oxide and / or propylene oxide.

The N-oxalkylated aniline derivatives in question can be prepared by adding the corresponding number of moles of ethylene oxide and / or propylene oxide to aniline and substituted aromatic amines in the presence of alkaline catalysts. The following can be used as alkaline catalysts: Na methylate, Na ethylate, Na n-propylate, sodium hydroxide, potassium hydroxide, potassium methylate and sodium phenolate.

Production of N- (ß-hydroxy-oxethyl-) aniline

Under a nitrogen atmosphere, 440 g (10 moles) of ethylene oxide were added to 465 g (5 moles) of aniline in an autoclave at approx. 140 ° C. and 3 bar in the presence of 2.3 g of Na methylate. After the reaction had ended, the mixture was flushed with nitrogen for half an hour and the reaction product obtained was used without further workup.

The following aniline derivatives can be used as starting materials for the addition of ethylene oxide and / or propylene oxide: o-toluidine, p-toluidine, p-phenylenediamine, N-methylaniline.

The most important effect of the products to be used according to the invention is that they do not show the disturbing blue color of the agent of the prior art. Furthermore, some of them have a significantly improved dissolving effect on the polymers used in self-waxing floors.

• 2,5 % n-Dodecylbenzolsulfonat-Na-Salz
• 3,0 % Fettsäuretriethanolaminsalz
• 2,0 % Fettsäureamidpolyglykolether
• 2,0 % Butyldiglykol
• 3,Q % Triethanolamin
• 3,0 % Ethylendiamintetraacetat
• 5,0% N-oxethyliertes Anilin

Rest zu 100% TrinkwasserSome of the products according to the invention were incorporated into the following formulation of a floor cleaning agent and used for cleaning tests:

• 2.5% n-dodecylbenzenesulfonate Na salt
• 3.0% fatty acid triethanolamine salt
• 2.0% fatty acid amide polyglycol ether
• 2.0% butyl diglycol
• 3, Q% triethanolamine
• 3.0% ethylenediaminetetraacetate
• 5.0% N-oxyethylated aniline

Rest 100% drinking water

PVC sheets that had been pretreated with commercially available floor care products (gloss, emsal, registered trademarks) were used for cleaning. The care products were colored with a dark color (R 28032 ex. Conc. BASF) for better evaluation of the cleaning tests.

The Gardner scrubber was used for cleaning. The cleaning effect was determined with the filter color measuring device RFC 3 from Zeiss.

• Reinigungswirkung in Prozent Aufhellung
  

Results:

• Cleaning effect in percent brightening
  

Figure 1 shows the cleaning effect of various N-oxyalkylated aniline derivatives compared to N-phenyldiethanolamine.

It shows that the products to be used according to the invention with 1 to 2 mol EO give significantly better cleaning results than the prior art. Products with higher levels of ethoxylation are less good.

However, it must be pointed out that, under practical conditions of use, no undesirable blue color was found even after several weeks.

Recipe examples for floor cleaning agents

The floor cleaning agents, in which the agent to be used according to the invention is used, consist i. a. from an anionic and / or nonionic surfactant and optionally an inorganic basic compound.

Claims (3)

1. The use of an N-oxyalkylated derivative of an aniline as a polymer solvent component in a floor cleaning composition, characterised in that a derivative of the general formula

where R₁ and R₂ are hydrogen, NH₂ or lower alkyl of 1 to 4 carbon atoms but are not identical with one another, R₃ is hydrogen or lower alkyl of 1 to 4 carbon atoms, R₄ is hydrogen or methyl and n is from 1.0 to 5.0, is used.

2. A use according to claim 1, characterised in that an aniline derivative of the general formula

where n is from 1 to 5, is used.

3. A use according to claim 1 or 2, characterised in that an aniline derivative of the general formula

where n is from 1 to 3, is used.