WO1998001528A1

WO1998001528A1 - Agent for cleaning hard surfaces

Info

Publication number: WO1998001528A1
Application number: PCT/EP1997/003368
Authority: WO
Inventors: Elisabet Dejorge; Jaume Josa
Original assignee: Henkel Kommanditgesellschaft Auf Aktien
Priority date: 1996-07-04
Filing date: 1997-06-26
Publication date: 1998-01-15
Also published as: EP0925351A1; DE19626906C1; DE59704548D1; ES2163787T3; ATE205249T1; EP0925351B1

Abstract

The invention concerns agents for cleaning hard surfaces, the agents containing: (a) alkali metal hypochlorites; (b) alkali metal hydroxides; (c) amino oxides; (d1) C8-C10 alkyl sulphates; and/or (d2) alkyl phosphates; and optionally further conventional auxiliary substances and additives. The agents are preferably used in the form of pump sprays and are distinguished by particularly advantageous foaming and cleaning power.

Description

Means for cleaning hard surfaces

Field of the Invention

The invention relates to new agents for cleaning hard surfaces, containing alkali metal hypochlorites, alkali metal hydroxides and selected surfactants and the use of the mixtures for the production of foam cleaners in aerosol form.

State of the art

In the past, such cleaning agents based on alkali metal hypochlorites have proven themselves in the areas of hygiene and disinfection, which have a remarkable viscosity and are therefore suitable for the treatment of horizontal as well as inclined and especially vertical surfaces. The viscosity of these agents has the effect that the contact time between them and the surfaces to be treated is considerably longer than in the case of commercially available liquid products which flow off rapidly from the surface.

Accordingly, there has been no shortage of attempts to provide such viscous bleaching and disinfecting agents. For example, it has been found that certain surfactants or surfactant mixtures have a thickening effect on aqueous hypochlorite solutions. For example, EP-A 0 274 885 (ICI) recommends the use of mixtures of linear and branched amine oxides. According to the teaching of EP-A 0 145 084 (Unilever), mixtures of amine oxides with soaps, sarcosinates, taurides or sugar esters can also be used for this purpose. The documents EP-A 0 137 551 and EP-A 0 447 261 (Unilever) disclose the use of amine oxides with soap or sarcosinate and other anionic surfactants, for example alkyl sulfates, alkyl ether sulfates, secondary alkane sulfonates or alkyl benzene sulfonates as thickening components. About using EP-A 0 156 438 reports alkylarylsulfonates as thickeners in aqueous bleaching agents which contain certain stilbene dyes as optical brighteners. ES-A 8801389 (Henkel Iberica) relates to bleaching agents based on aqueous hypochlorite solutions which, as surfactant components, predominantly contain alkyl ether sulfates and, in addition, small amounts of amine oxides. From EP-AI 0 447 261 aqueous bleaching compositions containing sodium hypochlorite and anionic surfactants are also known. However, the hypochlorite concentration of these agents is 0.1 to 8 and preferably 0.5 to 5% by weight of active chlorine. German patent DE-C1 43 33 100 (Henkel) proposes viscous aqueous bleaching and cleaning agents based on hypochlorites, fatty alcohol ether sulfates and amine oxides, which contain amine oxide phosphonic acids as a mandatory component.

Despite this extensive state of the art, not all market requirements have been met to this day. In particular for the production of spray cleaners, there is an urgent need for formulations based on hypochlorites which, on the one hand, have such a low viscosity that they can be sprayed in spray formulations, but whose foam is sufficiently stable and has enough volume that it can be applied even on inclined ones Adheres to surfaces long enough to completely remove the dirt. The object of the invention was therefore to provide aqueous cleaning agents with this complex profile of requirements.

Description of the invention

The invention relates to compositions for cleaning hard surfaces containing

(a) alkali metal hypochlorites,

(b) alkali metal hydroxides,

(c) amine oxides,

(d1) Cβ-Cio-alkyl sulfates and / or (d2) alkyl phosphates

and, if appropriate, other customary auxiliaries and additives.

Surprisingly, it has been found that agents of the stated composition have a viscosity which allows use in spray form and at the same time a particularly advantageous one Have foam and cleaning ability. This is all the more astonishing since short-chain alkyl sulfates have an extremely poor cleaning ability.

Alkali metal hypochlorites

Alkali metal hypochlorites are to be understood as meaning lithium, potassium and in particular sodium hypochlorite. The hypochlorites can preferably be used in amounts of 0.5 to 6, preferably 1 to 3 and in particular 1.5 to 2% by weight, based on the composition.

Alkali metal hydroxides

Potassium hydroxide and in particular sodium hydroxide are suitable as alkali metal hydroxides, which are preferably used in amounts of 0.05 to 2 and preferably 0.5 to 1.5% by weight and serve to adjust the pH of the compositions to an optimal value of 12.5 to 14 to set.

Amine oxides

Amine oxides which are suitable as component (c) are also known substances which are occasionally attributed to the cationic, but generally the nonionic surfactants. They are prepared from tertiary fatty amines, which usually have either one long and two short or two long and one short alkyl radical, and are oxidized in the presence of hydrogen peroxide. The amine oxides which are suitable for the purposes of the invention follow the formula (I)

I.

R ⁱ -N-> 0 (I)

I.

R3

in which R is a linear or branched alkyl radical having 12 to 18 carbon atoms and R ² and R ² independently of one another are R ¹ or an optionally hydroxy-substituted alkyl radical having 1 to 4 carbon atoms. Amine oxides of the formula (I) in which R ¹ and R ^{2 is} C12 / 14 or C 12/1 β-coconut a! Ky ireste and R ^{3 is} a methyl or a hydroxyethyl radical. Also preferred are amine oxides of the formula (I) in which R ^{1 is} a C12 / 14 or C12 / 18 cocoalkyl radical and R ² and R ³ are methyl or hydroxyethyl. The amine oxides are usually used in amounts of 0.1 to 4, preferably 0.3 to 2 and in particular 0.5 to 1.5% by weight.

Alkyl sulfates

Short-chain alkyl sulfates which follow the formula (II) are suitable as component (d1),

R OS0 ₃ X (II)

in which R ^{4 represents} an alkyl radical having 8 to 10 carbon atoms and X represents an alkali and / or alkaline earth metal, ammonium, alkylammonium, hydroxyalkylammonium or glucammonium. These are known anionic surfactants which are usually obtained by gas sulfation of the corresponding alcohols and subsequent neutralization with aqueous bases. Typical examples are octyl sulfate, decyl sulfate and their technical mixtures in the form of their sodium salts.

Alkyl phosphates

Instead of the short-chain alkyl sulfates, but also in a mixture with these substances, further surfactants of group (d2) are alkyl phosphates which follow the formula (III)

O

II

R5 (OCH ₂ CH ₂ ) "0-P-0 (CH ₂ CH2θ) mR ⁶ (III)

I ox

in which R ⁵ and R ⁶ independently of one another for alkyl and / or alkenyl radicals having 6 to 22 carbon atoms, X for an R ⁵ (OCH2CH2) n group, hydrogen or an alkali metal and n and m independently of one another for 0 or numbers of 1 are up to 10. These substances too are known anionic surfactants which are usually obtained by reacting optionally ethoxylated alcohols with phosphorus pentoxide. Typical examples are technical mixtures of Mono- and dialkyl phosphates based on fatty alcohols with 6 to 22, preferably 8 to 18 and in particular 12 to 18 carbon atoms. Instead of the alcohols, their adducts with an average of 1 to 10 and in particular 2 to 8 moles of ethylene oxide can also be used. The alkyl phosphates are preferably in the form of their sodium salts.

Industrial applicability

The agents according to the invention are characterized by a sufficiently low viscosity, which allows use in spray form. In the application, the foam proves to be stable, so that it remains sufficiently long on vertical surfaces to be able to reliably remove the dirt.

Auxiliaries and additives which the preparations may further contain include, for example, other chlorine-stable surfactants or hydrotropes, such as soaps, alkyl ether sulfates, alkyl sulfonates, alkyl benzene sulfonates, xylene sulfonates, sarcosinates, taurides, isethionates, sulfosuccinates, betaines, sugar esters, Fatty alcohol polyglycol ethers and preferably alkyl oligoglycosides and fatty acid N-alkyl glucamides. As a rule, the sum of these additional surfactants makes up at most 10% by weight of the total amount of surfactants in the formulation. The use of alkyl oligoglucosides in amounts of 0.5 to 3% by weight is particularly preferred.

Although the preparations can be used as aqueous solutions with an active substance content in the range from 1 to 25 and preferably 5 to 15% by weight, the preferred embodiment of the invention is to formulate the mixtures as sprays. Another object of the invention therefore relates to the use of mixtures containing

(a) Aikalimetalihypochlorite.

(b) alkali metal hydroxides,

(c) amine oxides,

(d1) Cβ-Cio-alkyl sulfates and / or (d2) alkyl phosphates for the production of foam cleaners in aerosol form. Accordingly, such formulations can contain from 1 to 25% by weight of propellant gases, such as propane, butane and / or carbon dioxide. However, the preparations are preferably formulated as propellant-free pump sprays.

In addition, the agents can contain active chlorine-stable fragrances, optical brighteners, dyes and pigments in a total amount of 0.01 to 0.5% by weight, based on the agents. The fragrances known to be active chlorine-resistant include, for example, monocyclic and bicyclic monoterpene alcohols and their esters with acetic or propionic acid (for example isoborneal, dihydroterpene oil, isobomylacetate, dihydroterpenylacetate). The optical brighteners can be, for example, the potassium salt of 4,4'-bis (1, 2,3-triazolyl) - (2 -) - stilbin-2,2-sulfonic acid, which is sold under the Phorwite® BHC brand 766 is distributed. Possible color pigments include green chlorophthalocyanines (Pigmosol® Green, Hostaphine® Green) or yellow Solar Yellow® BG 300 (Sandoz). The agents according to the invention are produced by stirring. If necessary, the product obtained can be decanted or filtered to remove foreign bodies and / or agglomerates.

Examples

The viscosity was determined at 20 ° C. using a Brookfield viscometer (model RVT, spindle No. 1 or No. 2, 200 rpm). To test for foam resistance, the test formulations were formulated as pump sprays and sprayed 5 times in succession against a vertically arranged glass surface. The drainage behavior was realistically determined against a standard commercial product (= 100% rel). The time within which the foam had completely run off the glass surface was measured. The cleaning ability was determined photometrically against the same standard product. The formulas R1 to R6 are according to the invention, the formulas R7 to R12 are used for comparison. The results are summarized in Table 1 (quantitative data as% by weight)

Table 1 Viscosity, foam resistance and cleaning ability

Components R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12

Sodium hypochlorite 1.5

Sodium hydroxide 1.0

Methyldilaurylamine oxide 1.0 1.0 1.0 1.5 1.0 1.0 1.0 1.0 1.5 2.0 _ _

Octyl sulfate sodium salt 1.0 2.0 3.0 2.0 2.0 1.5. _ _ _m 2.0 _

Lauryl sulfate sodium salt _ _ _ -. _ 1.0 _ 1.0 _

Cetearyl sulfate sodium salt. . . . . . . 1.0. _ _

Dilauryl phosphate sodium salt _ _ - »_ 1.0 1.5 _ _ _« _ 2.0

Water ad 100

Viscosity [mPas] <10 <10 <10 <10 <10 <10> 50> 50> 50 <10 <10 <10

Foam resistance [% -rel] 100 100 100 110 110 110 110 110 110 50 50 50

Cleaning power [% -rel] 104 105 105 105 107 108 100 102 105 54 66 76

It can be seen that the formulations with portions of longer-chain alkyl sulfates also have good foaming and cleaning properties, but are too viscous to be formulated as sprays. Preparations containing only amine oxides, alkyl sulfates or alkyl phosphates do not have sufficient foaming and cleaning properties. An optimum in terms of viscosity, foam resistance and cleaning performance is only achieved in the context of the mixtures according to the invention.

Claims

claims

1. Means for cleaning hard surfaces, containing

(a) alkali metal hypochlorites,

(b) alkali metal hydroxides,

(c) amine oxides,

(d1) Cβ-Cio-alkyl sulfates and / or (d2) alkyl phosphates

and, if appropriate, other customary auxiliaries and additives.

2. Composition according to claim 1, characterized in that they contain sodium hypochlorite.

3. Composition according to claims 1 and 2, characterized in that they contain sodium hydroxide.

4. Composition according to claims 1 to 3, characterized in that they contain amine oxides of the formula (I),

R ²

in which R ^{1 represents} a linear or branched alkyl radical having 12 to 18 carbon atoms, and R ² and R ³ independently of one another represent R ¹ or an optionally hydroxy-substituted alkyl radical having 1 to 4 carbon atoms.

5. Compositions according to claims 1 to 4, characterized in that they contain alkyl sulfates of the formula (II),

R ⁴ OS0 ₃ X (II) in which R ^{4 represents} an alkyl radical having 8 to 10 carbon atoms and X represents an alkali and / or alkaline earth metal, ammonium, alkylammonium, hydroxyalkylammonium or glucammonium.

6. Composition according to claims 1 to 5, characterized in that they contain alkyl phosphates of the formula (III),

0

II

R ⁵ (OCH ₂ CH ₂ ) nO-P-0 (CH ₂ CH ₂ 0) m R ⁶ (III)

I ox

in which R ⁵ and R ⁶ independently of one another for alkyl and / or alkenyl radicals having 6 to 22 carbon atoms, X for an R ⁵ (OCH2CH2) _n group, hydrogen or an alkali metal and n and m independently of one another for 0 or numbers of 1 are up to 10.

7. Use of mixtures containing

(a) alkali metal hypochlorites,

(b) alkali metal hydroxides,

(c) amine oxides,

(d1) Cβ-C 1 o-alkyl sulfate and / or (d2) alkyl phosphates

for the production of foam cleaners in aerosol form.