HU207120B - Degreasing and deoling micellar solution, particularly for cleaning metal surfaces - Google Patents

Abstract

A degreasing cleaning cpd especially for metallic surfaces is a smaller soln of: a) 5 wt% max of a surfactant mixt (HLB 7-9) contg an alkyl-poly-glycol-ether (I) with 2-5 mols of ethoxy gps based on 10-18C satd, or 16C unsatd natural or 9-18C synthetic alcohols and nonyl-phenyl-polyglycol ether (II) contg 10 mols of ethoxy gps. the wt ratio between (I):(II) = 2:1-4:1, and b) 3-5 fold excers of iso-propyl-alcohol-based on (I)+(II)

Description

(57) EXTRAS

The cleaning agent of the invention

(a) 25 molar alkyleneglycol ether of ethylene oxide and 10 molar nonylphenylpolyglycol ether containing 10 mol of ethylene oxide and 10 mol of ethylene oxide in saturated or unsaturated alcohol or in carbon monoxide of synthetic alcohol of 9 to 18 carbon atoms 2: 1-4 : 1 wt.% HLB 7-9 surfactant mixture as surfactant,

b) it contains 3 to 5 times the amount of the surfactant mixture in an aqueous solution.

Scope of the description: 4 pages

HU 207 120 B

HU 207 120 B

BACKGROUND OF THE INVENTION The present invention relates to an environmentally friendly liposuction and de-oiling micellar solution which is effective at room temperature, especially for cleaning metal surfaces containing an optimized HLB mixture of water-soluble nonionic surfactants and a lower alcohol favoring solubilization.

It is well known in the literature and practice that micelles are structured aggregates of amphiphilic molecules containing hydrophobic and hydrophilic groups in which the hydrophobic moieties of the molecules produce interactions. the inner nucleus, while the outer sphere contains hydrated polar groups.

Other amphiphilic ("cosurfactant") molecules - alcohols, carboxylic acids - can also be incorporated into the micelle structure with a certain orientation. mixed or complex micelles develop. One of the very important features of aqueous micellar solutions is that the micelles are capable of solubilizing lipophilic molecules according to the chemical structure of the inner core. However, larger amounts of oil than the solubilization capacity of the solution are concentrated in a separate water-in-oil type emulsion phase.

The solubilization capacity of aqueous micellar systems is more pronounced in solutions of complex micelles.

DE 3 232915 A1 discloses a two-component surface cleaning agent containing 0.5 to 5% by weight of polyglycol ether. As the polyglycol ether, e.g. Straight-chain or branched saturated or unsaturated C 6 -C 18 -alkyl alcohol, phenol and C 1 -C 12 -alkyl alkyl phenol containing from 3 to 12 moles of ethylene oxide and optionally from 1 to 10 moles of propylene oxide; Alkyl or alkenylcarboxylic acids having 5 to 17 carbon atoms or alkenyl groups which may be substituted by hydroxy and employ alkyl amines having 6 to 18 carbon atoms. In addition to the polyglycol ether, the detergent also contains anionic surfactants and / or complexing agents. A disadvantage of the present invention is that it is effective only at high temperatures (70-80 ° C) and at a given pH (7.5-9.5). Additives should be used to further increase efficiency.

GB 2116557 9A discloses a two- or three-component aqueous nonionic micellar detergent with alkanolamides to remove hydrocarbon oils.

One component is from 5 to 95% by weight of a non-surfactant (alcohol, carboxylic acid, alkylphenol, nonionic phosphate) containing from 1 to 120 moles of ethylene oxide having from 6 to 12 carbon atoms and the other component having from 95 to 5% by weight. Alcoholic amides containing from 1 to 12 moles of ethylene oxide in an organic solvent containing an aqueous and / or water miscible hydroxyl group.

This cleaner contains tertiary amine, which is not environmentally friendly and must be treated as hazardous waste with all the disadvantages that this entails.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a water-predominantly water-degreasing micellar solution which is environmentally friendly and has high surface-cleaning properties at room temperature and which it is concentrated in a small volume and can be disposed of by a suitable method, and the exhausted aqueous phase can be reused after regeneration.

FIELD OF THE INVENTION The present invention relates to a degreasing and de-oiling micellar solution, mainly for cleaning metal surfaces, containing up to 5% by weight of a mixture of fatty alcohols and alkylphenyl polyglycol ether surfactants in an aqueous organic solvent solution. In the cleaning agent of the invention

(a) 2-5 moles of alkylpolyglycol ether containing 10 to 5 moles of ethylene oxide and 10 moles of nonylphenyl containing ethylene oxide as the fatty alcohol polyglycol ether and containing 10 to 5 moles of naturally occurring saturated or C16-C18 unsaturated alcohol or 9 to 18 moles of synthetic alcohol; polyglycol ether as a surfactant in a weight ratio of 2: 1-4: 1, HLB 7-9,

b) it contains 3-5 times the amount of isopropanol as the organic solvent in the amount of the surfactant mixture.

The present invention is based on the discovery that the HLB nonylphenyl polyglycol ether is a water-soluble and oil-soluble, low-HLB alkyl-polyglycol ether having a low HLB content of 10, but not a water-soluble surfactant (HLB). = 7-10) ensures the maximum oil solubilizing property of the micellar solution and the ability to produce a high water content system.

This requires the use of ethoxylates based on various natural and synthetic alcohols. These can be uniform or blends.

For fatty alcohols, the only alcohols of natural origin which may be taken into consideration are those with even number of carbon atoms:

C _l2 alcohol (lauryl alcohol), coconut oil base,

_C) -C _{6 Ig} alcohols (palmityl or stearyl alcohol), natural fats base, neat or mixed with

C ₁₆ -unsaturated alcohol (oleyl alcohol).

Of the fatty alcohols produced on a sintered basis:

Cji-Cg alcohols; C | _{2- C13} alcohols; C | ₂ -C ₁₅ alcohols;

C | ₄ -C ₁₅ alcohols;

C ₁₂ -C 14 alcohols; C ₂ -C ₁₈ alcohols;

_C12 alcohol; izotridecil- _(C13) alcohol.

Another component of the detergent according to the invention is propyl alcohol, which is one of the most beneficial in solubilizing and does not cause environmental pollution.

The experimental results described below, for example, are Verolex-4, 4 molar ethoxy-grouped C 10 -C 18 alkyl polyglycol ether (hereinafter REO ₄ ) having an HLB of 6, and Neonol10-branded 10 mole ethoxy group nonylphenyl polyglycol. ether (hereinafter referred to as NPEO ₁₀ ) having an HLB value of 15.

HU 207 120 Β

Example 1 Composition:

3,284 wt% REO ₄ (Verolex-4 brand name) 0.821 wt% NPEO _{) 0} (Neonol-10 brand name) 14.683 wt% IPA (isopropyl alcohol)

81.218% H ₂ O.

Example 2 Composition:

3.942% by weight REO ₄ (Verolex-4) 0.986% NPEO ₁₀ (Neonol-10) 14.688% IPA

80.386 wt.% H ₂ O.

According to our experimental results, at room temperature, micellar solutions of the above composition contain about 6 times (2530 vol.%) Of surfactant (hereinafter FAA) in mechanical oil, motor oil (eg Multisuper oil MSE15 W-40) for mechanical action (shaking). within minutes, they form a stable emulsion that does not oil out for days, so they are easy to remove and skim. (The "familiarity" with the lower aqueous phase is indicated by the absence of cloudiness when diluted with water. The micellar solutions tested maintain their thermal stability up to 55 ° C. In our experiments, these requirements are consistent with REO ₄ : NPEO ₁₀ = 4: l weight ratio. The surfactant mixture corresponds to HLB = 7.8 and = 0.960 g / cm ³ .

According to our investigations, for this surfactant composition, the IPA content of the water-IPA solvent mixtures in the FAA solution is only slightly increased with the amount of FAA, while the specific concentration of IPA ( _cf = cm ³ IPA / cm ³ FAA, , which, at a given concentration of surfactant, exhibits a strongly decreasing tendency to convert FAA to a volume of aqueous micellar solution.

After low FAA content of the solution a solubilizing or emulsifying ability of the practical needs not met, however, the FAA concentration further increase of over 5% FAA, the impact is hardly enhanced by established that c _f = 3-5cm ³ IPA / The solubilizing or emulsifying properties of micellar solutions prepared at specific values between cm ^{3 and} FAA are optimal.

For the formulations in the examples, _cf = 4.5. The optimized formulations provide a micellar solution, according to our objectives, which solubilizes the impurities in the specimens efficiently and disperses them in a stabilized emulsion with small solid impurities.

The solution remaining on the surface of the specimens or the solubilized or emulsified oil may be washed off with plenty of water. To determine the metal surface obtained after cleaning, the specimens were washed with white spirit. No measurable amount of oil in the wash was detected. Studies of the solubilizing and emulsifying capacity of the shaker roller showed that as the oil content increased, the initial aqueous FAA and IPA contents gradually increased in the equilibrium oil phase, resulting in a stable, crisp type emulsion, so called it is concentrated in a transitional phase without the appearance of a third pure oil phase. The aqueous phase beneath the emulsion is free of turbidity and can be reused after removal and regeneration of the oily emulsion. The oily emulsion can be disposed of without pollution.

The degreasing solution of the present invention is advantageously used for cleaning degreasing machine parts prior to heat treatment, for cleaning the engine compartment, engine block of motor vehicles.

Apply the appropriate amount of degreasing solution to the contaminated surface by spraying, brushing or dipping.

It is also available in aerosol form.

Claims (1)

PATIENT INDIVIDUAL POINTS 1. Fat and degreasing micellar solution mainly for tearing metal surfaces, containing up to 5% by weight of a fatty alcohol and alkylphenyl polyglycol ether ether in an aqueous-organic solvent solution, characterized in that (a) alkylene-polyglycol ether of 2-5 moles of ethylene oxide containing from 2 to 5 moles of ethylene oxide and from 10 moles of ethylene oxide containing nonylphenyl polyglycol ether produced from naturally occurring C illetve illetve illetveomosomos természetes-18 alapú vagy illetve illetve illetve illetve illetve illetve illetve illetve illetve illetve illetve illetve illetve illetve vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy vagy))). : 1 weight ratio, 7-9 HLB, b) contains, in the form of an organic solvent, from 3 to 5 times the amount of the isopropanol mixture.