WO2001059055A1 - Detergent - Google Patents

Abstract

The invention relates to an aqueous detergent for industrial use, containing alkoxyalkyl acetate, alkane sulfonate and arylpolyglycol ether.

Description

cleaning supplies

The present invention relates to a new cleaning agent, in particular for use in industrial areas.

Cleaners are mostly surfactant-containing formulations with a wide range of uses and therefore very different compositions.

A distinction is made between alkaline, neutral and acidic cleaners according to the pH value, liquid cleaners (also in spray form) and solid cleaners (also in tablet form). In contrast to dishwashing detergents, which are usually also classified in the product group of detergents, so-called cleaners for hard surfaces should show an optimal application profile both in the concentrated state and in dilute aqueous solutions in conjunction with mechanical energy. Cold cleaners perform without increasing the temperature. The main determining factors for the cleaning action are surfactants and / or alkali carriers, alternative acids, and if appropriate also solvents such as glycol ethers and lower alcohols. In general, there are also builders in the formulations, depending on the type of detergent, bleaching agents, enzymes, germ-reducing or disinfectant additives and perfume oils.

Household cleaners can be formulated as universal cleaners or as special cleaners for ceramics, tiles, windows, plastics, (carpeted) floors, hobs, ovens, microwave ovens, as sanitary cleaners or toilet cleaners. Pipe cleaners are alkaline and consist, for example, of solid sodium hydroxide and aluminum powder. In addition to surfactants and builders, sanitary cleaners mainly contain germ-reducing agents, although the sodium hypochlorite previously used is partly replaced by hydrogen peroxide or other peroxygen compounds. The specialty cleaners in the do-it-yourself area include automotive, car, window, rim, engine and paint application cleaner. Technical cleaners are mainly used in the beverage, food, chemical, cosmetic and pharmaceutical industries, but also in the metal industry for metal degreasing. The product group also includes cleaners for car washes, tank truck and aircraft cleaners. In view of the required productivity, these cleaners must be formulated with low-foam surfactants, for which special non-ionic surfactants such as ethylene oxide-propylene oxide block copolymers and so-called end-capped alkyl ethoxylates are suitable.

Many of the known cleaners may contain halogenated, organic ones

Solvent. Another disadvantage is that the cleaners often contain acidic or basic components. In many cases, their effectiveness is not sufficient. A sufficiently high flash point is still important for industrial applications.

A new cleaning agent has now been found containing one or more

Alkoxyalkylacetate, one or more alkanesulfonates, one or more aryl polyglycol ethers and water.

Surprisingly, the cleaning agent according to the invention has a very good cleaning effect.

The term alkoxyalkyl acetate encompasses compounds of the formula (I)

R ¹ - (CH ₂ -CH ₂ -O) _n -CO-R ² (I) wherein

R ¹ for alkyl,

R ² for alkyl and

n stands for an integer, in particular from 1 to 50. R ¹ preferably represents C _r C ₆ alkyl,

R ² preferably represents C1 -C ₄ alkyl,

n is preferably an integer from 1 to 5.

R ¹ particularly preferably represents C ¹ -C ₄ -alkyl,

R ² particularly preferably represents C _j -C 3 alkyl,

n particularly preferably represents an integer from 1 to 3,

n very particularly preferably stands for 2.

Alkyl glycol esters may be mentioned as examples. Butyl diglycol esters are preferably used, particularly preferably butoxyethoxyethyl acetate.

The term alkanesulfonate encompasses compounds of the formula (II)

H- (CH ₂ ) _m -SO ₃ X (II) wherein

m represents an integer, preferably from 1 to 30, particularly preferably from 3 to 15 and very particularly preferably for 13 and

X stands for sodium or potassium.

Examples include sulfonates and alkanesulfonates. Na alkanesulfonates are preferred, particularly preferably Na alkanesulfonate with a medium

Chain length of C ₁ 3 used. The term aryl polyglycol ether encompasses compounds of the formula (III)

Ar- (CH ₂ -CH ₂ -O) _p -H (III) wherein

No is aryl, preferably phenyl and

p represents an integer, preferably from 10 to 20, particularly preferably from 12 to 18 and very particularly preferably from 14 to 16.

Monofunctional polyethers may be mentioned as examples. Aryl polyglycol ethers are preferably used, particularly preferably aryl polyglycol ethers with about 16 ethoxy units (EO).

The term water includes tap water, but also demineralized water.

The composition of the constituents mentioned for the cleaner can be varied. If the sum of the components mentioned is considered to be 100% by weight (although these do not necessarily represent the entire cleaning agent), the individual components are present in the following amounts:

Compound or compounds of the formula (I): 30 to 50% by weight,

Compound or compounds of the formula (II): 10 to 25% by weight, compound or compounds of the formula (III): 5 to 20% by weight and

Water: 20 to 40% by weight.

The present invention further relates to a method for producing the cleaner according to the invention, which is characterized in that the constituents of the cleaner are intimately mixed with one another. The present invention further relates to the use of the cleaner according to the invention for cleaning objects.

The term cleaning includes the removal of unwanted deposits, especially dirt from objects. Especially in industrial

This includes incrustations, sticky contaminants, resins, greases as well as oligomeric and polymeric production residues, but also includes other industrial contaminants.

The items to be cleaned include, for example, tanks, grinders and

Motors, but also metallic objects of all kinds. The cleaner can be used particularly advantageously for metal degreasing, for example in the metal industry. The cleaner according to the invention is free from acids, alkalis and organic solvents.

It is partially miscible with water, which enables problem-free subsequent cleaning or rinsing with water.

The good cleaning effect is achieved without the addition of aggressive or abrasive materials. The cleaner is therefore well compatible with most materials, such as high-alloy steels (stainless steel), steel, glass, ceramics and some plastics, such as polycarbonates, HD-PE and fluorinated polyolefms.

The high flash point of the cleaner according to the invention is also advantageous

(> 81 ° C).

The cleaner according to the invention can additionally contain further additives.

Examples include corrosion inhibitors (e.g. imidazoles and triazole) VI

Viscosity index improvers (e.g. hydrogenated copolymers and methacrylates) germ-reducing (e.g. phenol derivatives) and disinfectant (e.g. FN-releasing) additives called.

The cleaner can also contain perfume oils. The cleaner can continue to use so-called defoamers, for example

Contain silicone defoamers or tributyl phosphate.

The additives mentioned are optionally present in the cleaner in customary amounts familiar to the person skilled in the art.

Surprisingly, the cleaner according to the invention shows its good effect even at room temperature. However, it can be used in a wide temperature range, generally between 0 ° C and 50 ° C, preferably between 10 ° C and 30 ° C.

Preparation example

The following components are placed in a 2 m ³ stirred tank at room temperature in the order given below:

400 kg butyl diglycol acetate

320 kg of demineralized water

150 kg Na alkanesulfonate (Mersolat W93)

130 kg aryl polyglycol ether (emulsifier PS 16)

This mixture is stirred at room temperature for 30 minutes. The cleaner is then ready for use.

Nnwendungsbeispiele

The effectiveness of the above-mentioned detergent mixture has been tested on high and low alloy steels.

example 1

In terms of production technology, a V2-A steel surface was covered with a previously swollen and then dried styrene resin. State of the art is the mechanical removal of this contamination with so-called high-pressure cleaners. Various detergents were examined for their detachability:

Visual assessment of the resin release ability

Water no effect

Universal cleaner with little effect

(Surfactant / Falterol)

Industrial cleaner little effect

(Solvent)

Special cleaner moderate effect

(Cupran) very good effect according to the invention

cleanser

Test conditions: The contaminated surface was wetted with the cleaning solution for 20 minutes at room temperature. Finally, an attempt was made to clean the surface with a gentle water jet.

Example 2

In terms of production technology, an ST 34 metal surface was contaminated with a previously swollen and then dried styrene resin. State of the art is the mechanical removal of this contamination with so-called high-pressure cleaners.

Various detergents were examined for their detachability:

Visual assessment of the resin release ability

Water no effect

Universal cleaner with little effect

(Surfactant / Falterol)

Industrial cleaner little effect

(Solvent)

Special cleaner moderate effect

(Cupran) very good effect according to the invention

cleanser

Test conditions: The contaminated surface was wetted with the cleaning solution for 20 minutes at room temperature. Finally, an attempt was made to clean the surface with a gentle water jet.

Example 3

In terms of production technology, a glass surface was covered with a previously swollen and then dried styrene resin. The state of the art is the mechanical removal of this contamination.

Various detergents were examined for their detachability:

Visual assessment of the resin release ability

Water no effect

Universal cleaner with little effect

(Surfactant / Falterol)

Industrial cleaner little effect

(Solvent)

Special cleaner moderate effect

(Cupran) very good effect according to the invention

cleanser

Test conditions: The contaminated surface was wetted with the cleaning solution for 20 minutes at room temperature. Finally, an attempt was made to clean the surface with a gentle water jet.

Claims

claims 1. Cleaning agent containing one or more alkoxyalkylates, one or more alkanesulfonates, one or more aryl polyglycol ethers and water. 2. Use of the cleaning agent according to claim 1 for cleaning objects.