ES2249262T3 - LIQUID CLEANING COMPOSITIONS CONTAINING AN ETOXYLED ESTIMATE ESTER. - Google Patents

Abstract

An improvement is described in all purpose liquid cleaning composition which are especially effective in the removal of oily and greasy soil containing a nonionic surfactant, an anionic surfactant, a fatty acid, magnesium sulfate, methyl ethoxylated ester cosurfactant, a perfume, essential oil or water insoluble organic compound and water.

Description

Liquid cleaning compositions containing an ethoxylated methyl ester.

Field of the Invention

The present invention relates to a multipurpose cleaning composition or a cleaning composition in microemulsion, which contains a co-surfactant of the ester type of ethoxylated methyl.

Background of the invention

This invention relates to a composition. improved multi-purpose liquid cleaner or a composition in microemulsion designed in particular for surface cleaning hard and that is effective in removing grease dirt and / or the dirt of bathrooms and leaving surfaces not rinsed with A bright appearance.

In recent years liquid detergents Multipurpose have been widely accepted for cleaning hard surfaces, e.g. eg, carpentry work and boards painted, tiled walls, sinks, bathtubs, linoleum or floors tiling, washable paper to wallpaper walls, etc. These multi-purpose liquids comprise transparent and opaque aqueous mixtures of water-soluble synthetic organic detergents and salts water-soluble detergent builders. With the purpose of achieve a cleaning efficiency comparable to that of granular or powder multipurpose cleaning compositions, the use of reinforcing salts of the type of water soluble inorganic phosphates, it was favored in the multi-purpose liquids of the prior art. By example, those first compositions containing phosphates were They are described in US Pat. no. 2,560,839; 3,234,138; 3,350,319; and in British Patent No. 1,223,739.

In view of the efforts to improve the environment environment to reduce phosphate levels in groundwater, improved multi-purpose liquids that contain reduced concentrations of phosphate-type reinforcing salts inorganic or reinforcing salts of the type other than phosphates. A particularly useful self-opaque liquid of The latter type is described in US Pat. no. 4,244,840.

However, these multi-purpose liquid detergents of the prior art, which contain reinforcing salts for detergents or other equivalent salts, tend to leave veils, stains or scratches on the cleaned and unclarified surfaces, in particular on glossy surfaces. Therefore, these liquids require well-made rinses of cleaned surfaces which For the user it is a time-consuming task.

In order to solve the disadvantage discussed above of the multi-purpose liquid of the prior art, U.S. Patent no. 4 017.409 teaches that a mixture of paraffin sulphonate and a reduced concentration of one reinforcing salt of the inorganic phosphate type. However, those compositions are not totally acceptable from a point of view environmental based on phosphate content. For other part, another alternative to obtain multi-purpose liquids free of phosphates has consisted of using a larger proportion of a mixture of anionic and non-ionic detergents along with smaller amounts of solvent of glycol ether and organic amine type, as shown in US Pat. no. 3,935,130. Again, this strategy does not It has been totally satisfactory and high levels of detergents organic necessary to obtain the cleaning produce the formation of foam which, in turn, leads to the need for rinsing well done which has been found not convenient for today's consumers.

Summary of the invention

The present invention provides a composition Improved liquid cleaner, in microemulsion, which has a better interfacial tension that improves surface cleaning hard and is suitable for cleaning hard surfaces such as plastic, vitreous and metallic surfaces that have a finish bright, oil-stained floors, automotive engines and others engine types More particularly, the cleaning compositions Improved microemulsion exhibit good elimination properties of grease stains due to the best interfacial tensions, when used in diluted form, and leave surfaces shiny cleaned without rinsing or wiping, or requiring Only an additional minimum of rinsing or wiping. This last feature is evidenced by scant or no waste visible left on the surfaces cleaned and not cleared and, therefore, it solves one of the disadvantages of the products of the prior art.

Surprisingly, these desirable results are they achieve even in the absence of polyphosphate salts or other salts boosters for detergents, organic or inorganic, and also in complete absence or substantially complete absence of fat eliminating solvents.

WO 99 09121 A describes a microemulsion composition that includes a non-ionic surfactant containing ethoxylated and / or propoxylated groups, a surfactant anionic, a co-surfactant, a fatty acid, a perfume / oil essential / organic compound of C 8 -C 18 Insoluble in water, a salt of magnesium and water. However, this previous application does not describe the compositions that also include ethoxylated methyl compounds used as co-surfactants.

Documents DE 195 02 454 A, US-A-4 088 598, DE 42 27 046 and the summary of document JP 05 202 381 ( Chemical Abstracts , vol. 120, No. 2, January 24, 1994 (24- 01-1994) Columbus, Ohio, US; summary No. 33451x, page 166; XP 000408011) describe ethoxylated methoxy esters. However, these compounds are described only as non-ionic surfactants due to low foaming properties and the documents do not contain indications that these compounds may be suitable as surfactants in a microemulsion cleaning composition.

This invention generally provides a cleaning composition for hard surfaces, in microemulsion stable, especially effective in the removal of oil and grease. The liquid cleaning composition or the microemulsion composition includes, in a proportion by weight:

a proportion of 0.5% to 6%, more preferably from 1% to 3%, of a non-ionic surfactant that it contains ethoxylated groups and / or ethoxylated / propoxylated groups;

a proportion of 0.1% to 8%, more preferably from 1% to 4%, of an anionic surfactant;

a proportion of 0.5% to 8%, more preferably from 1% to 4%, of an ester type co-surfactant of water-miscible ethoxylated methyl;

a proportion of 0.1% to 2.5%, more preferably 0.15% to 1%, of a fatty acid;

a proportion of 0.1% to 6%, more preferably 0.2% to 2%, of a magnesium sulfate heptahydrate;

a proportion of 0.1% to 5%, more preferably 0.2% to 2%, of a water insoluble perfume, of an essential oil or a water-insoluble organic compound that it contains from 8 to 18 carbon atoms; Y

water being the remaining proportion, in which the Composition does not contain choline chloride, polyethylene glycol, poly (vinyl pyrrolidone), or an ethoxylated polyhydric alcohol, totally or partially esterified, and in which the composition does not it contains a monoester that has 8 to 20 carbon atoms and that does not it contains 6 or 8 ethoxylate groups, or an organic diester that has 10 to 40 carbon atoms and it does not contain 6 or 8 ethoxylate groups such as isohexyl neopentanoate, distearate PEG-8, PEG-12 distearate, isopropyl myristate, mírido-3-myristate and lauryl-2 (ethyl hexanoate). The composition it also does not contain an aliphatic carboxylic acid of C 3 -C 6 or a glycol ether.

Detailed description of the invention

The present invention relates to a stable microemulsion cleaning composition as defined in claim 1

According to the present invention, the role of the water insoluble hydrocaubide can be provided with a water insoluble perfume. Typically, in aqueous-based compositions the presence of solubilizers, such as a lower alkyl and aryl hydrotrope sulfonate and alkali metal sulfonate, triethanolamine, urea, etc., is required for the dissolution of the perfume, especially with perfume levels of 1% and higher, because perfumes are generally a mixture of fragrant essential oils and aromatic compounds that are usually insoluble in water. Therefore, by incorporating the perfume in the aqueous cleaning composition, in the oil (hydrocarbon) phase of the final composition of the oil / water microemulsion (or / a), several, important and different are achieved.
advantages.

First, the cosmetic properties of the Final cleaning composition improves: the compositions are transparent (as a result of the formation of a microemulsion) and with a high level of fragrance (as a consequence of the perfume level).

Second, the need to use is eliminated solubilizers, which do not contribute to cleaning efficiency.

Third, you can get a better effect fat shedding and better elimination capacity of fat with pure (undiluted) use of the diluted appearance or after of the dilution of the concentrate, without using reinforcing agents for detergents or buffers, or conventional solvents fat eliminators, at neutral or acidic pH and at low levels of active components, although an efficacy of Improved cleaning with use in diluted form.

As used herein and in the claims attached, the term "perfume" is used in its ordinary sense to refer to, and to include, any fragrant substance or mixture of fragrant substances, insoluble in water, including natural odoriferous substances (i.e., obtained by extraction of flowers, herbs, flower buds or plants), artificial (i.e. mixture of natural oils or oily constituents) and synthetically produced. By way of typical, perfumes are complex mixtures of mixtures of different organic compounds such as alcohols, aldehydes, ethers, aromatic compounds and varying amounts of essential oils (e.g., terpenes) in a proportion such as 0% to 80%, normally from 10% to 70% by weight, the oils themselves being essential volatile odoriferous compounds that also serve to dissolve the rest of the perfume components.

In the present invention the exact composition of perfume has no particular importance for the effectiveness of cleaning as long as it satisfies the immiscibility criteria in water and having a pleasant smell. Naturally and of course, especially in the case of cleaning compositions intended for domestic use, perfume, as well as the rest of the components, it must be cosmetically acceptable, that is, it must be non-toxic, hypoallergenic, etc. The present compositions show a remarkable improvement in ecotoxicity compared to products existing commercials.

Instead of perfume, both in the composition in microemulsion as in the microemulsion cleaning composition for hard surfaces, and in the same concentrations previously defined in which the perfume was used in the microemulsion or composition cleaning composition multipurpose cleaner for hard surfaces, you can use a essential oil or a water insoluble hydrocarbon containing 6 to 18 carbons, such as a paraffin or isoparaffin.

Typical heterocyclic compounds are the 2,5-dimethylhydrofuran, 2-methyl-1,3-dioxolane, 2-ethyl-2-methyl-1,3-dioxolane, 3-ethyl-4-propyl-tetrahydropyran, 3-morpholino-1,2-propanediol and N-isopropyl-morpholine. An amine typical is the alpha-methylbenzyldimethylamine. They are typical 4-bromotoluene halogens, butyl chloroform and methyl perchloropropane. They are typical hydrocarbons 1,3-dimethylcyclohexane, cyclohexyl-1-dean, methyl-3-cyclohexyl-9-nonano, methyl-3-cyclohexyl-6-nonane, dimethyl cycloheptane, trimethyl-cyclopentane, ethyl-2-isopropyl-4-cyclohexane. They are typical aromatic hydrocarbons bromotoluene, diethyl benzene, cyclohexyl-bromoxylene, ethyl-3-pentyl-4-toluene, tetrahydronaphthalene, nitrobenzene and methyl naphthalene. Typical are water-insoluble esters of benzyl acetate, acetate of dicyclopentadienyl, isononyl acetate, isobornyl acetate, isobutyl isobutyrate, and aliphatic esters having the formula from:

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one

or

2

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in which R_ {12}, R_ {14} and R 15 are C 2 -C 8 alkyl groups, plus preferably C 3 -C 7 alkyl groups, and R 13 is a C 3 -C 8 alkyl group, plus preferably a C 4 -C 7 alkyl group, and n is a number from 3 to 8, more preferably from 4 to 7.

They are typical water insoluble ethers di (alphamethyl benzyl) ether and diphenyl ether. They are typical phenoxyethanol alcohols and 3-morpholino-1,2-propanediol. Typical nitrobutane and water insoluble nitro derivatives nitrobenzene.

Suitable essential oils are selected from the group consisting of: natural anethole 20/21, star anise oil from China, world brand of aniseed oil, balm (from Peru), basil oil (India), black pepper oil , 40/20 black pepper oleoresin, rosewood oil (Brazil) FOB, bomeol flakes (China), camphor oil, technical white camphor synthetic powder, cananga oil (Java), cardamom oil, cassia (China), cedar wood oil (China) BP, cinnamon bark oil, cinnamon leaf oil, citronella oil, clove bud oil, clove leaves, coriander (Russia), coumarin 69 ° C (China ), cyclamen aldehyde, diphenyl oxide, ethyl vanillin, eucalyptol, eucalyptus oil, Eucalyptus citriodora , fennel oil, geranium oil, ginger oil, ginger oleoresin (India), white grapefruit oil, guaiac bark oil , Gurjun balm, heliotropin, isobor acetate nile, isolongifolene, juniper berry oil, methyl L-acetate, lavender oil, lemon oil, lemon oil, distilled lime oil, litsea cubeba oil, longifolene, menthol crystals, methyl-cedril-ketone, methyl chavicol, methyl salicylate, musk amber, musk ketone, musk xylol, nutmeg oil, orange oil, patchouli oil, peppermint oil, phenylethyl alcohol, pepper berry oil, pepper leaf oil, Rosalina, sandalwood oil, Sandenol, sage oil, wild sage, sassafras oil, spearmint oil, lavender spikes, tagetes, tea tree oil, vanillin, vetiver oil (Java), ferrule, Allocimeno , Arbanex ™, Arbanol®, bergamot oils, canphene, alpha-canphenic aldehyde, L-carvone, cineols, citral, citronellol terpenes, alpha-citronellol, citronellyl acetate, citronellyl nitrile, para-cimeno, dihydroanetol, dihydrocarveol, d-dihydrocarvo na, dihydrolinalol, dihydromyrcene, dihydromyrcenol, dihydromyrcenyl acetate, dihydroterpineol, dimethyloctanal, dimethyloctanol, dimethylctanyl acetate, estragol, 2-methylbutyrate ethyl, phenol, Femlol ™, Florilys ™, geraniol, geranyl acetate, geranityl, geranityl oils, geranylmint, glranylmint, geranityl oils, geranityl oils, geranityl oils ™, Glidox ™, grapefruit oils, trans-2-hexenal, trans-2-hexenol, cis-3-hexenyl isovalerate, cis-3-hexanyl-2-methyl butyrate, hexyl isovalerate, hexyl 2-methylbutyrate , hydroxycitronellal, ionone, isobornyl methyl ether, linalool, linalool oxide, linalyl acetate, methane hydroperoxide, I-methyl acetate, methyl hexyl ether, methyl 2-methylbutyrate, 2-methylbutyl isovalerate, myrcene, nerol, neryl acetate, 3-octanol acetate, 3-octyl, phenylethyl 2-methylbutyrate, Petitgrain oil, cis-pinene, pineapple hydroperoxide, pinanol, pineal ester, pine acid oils, pine oil, alpha -pinine, beta-pinene, alpha-pinene oxide, plinol, acetat or plinyl, pseudo-ionone, rodinol, rhodinyl acetate, spice oils, alpha-terpinen, gamma-terpinen, terpinen-4-OL, terpineol, terpinolene, terpinyl acetate, tetrahydrolinalol, tetrahydrolinalyl acetate, tetrahydromyrcenol, Tetralol ™ , tomato oils, Vitalizair, Zestoral ™.

The non-ionic surfactant that constitutes the main component of the present liquid detergent, is found in amounts of 0.1% to 10%, preferably 0.2% to 8% in weight of the composition, and provides superior efficacy in the oil stain removal and provides softness to the skin human

Water-soluble nonionic surfactants, used in this invention, are well known commercially and include ethoxylates of primary aliphatic alcohols, ethoxylates of secondary aliphatic alcohols, ethoxylates of alkylphenols and products resulting from the condensation of oxide of ethylene - propylene oxide on primary alkanols, such as Plurafacs (BASF) such as Plurafac LF300, and resulting products of the condensation of ethylene oxide with fatty acid esters and sorbitan such as the Tweens (ICI). Organic detergents do not synthetic ionics are generally the products resulting from the condensation of a hydrophobic, aliphatic or alkyl organic compound aromatic, and hydrophilic groups of ethylene oxide. Practically any hydrophobic compound containing a carboxy, hydroxy group, amido or amino with a free hydrogen bound to nitrogen, you can condense with ethylene oxide or with the product of the polyhydration of the latter, polyethylene glycol, to form a Water-soluble non-ionic detergent. In addition, the length of the poly (ethylene oxide) chain can be adjusted to obtain the desired balance between hydrophobic elements and elements hydrophilic

The non-ionic detergent class includes condensation products of a higher alcohol (e.g., a alkanol containing 8 to 18 carbon atoms in a linear or branched chain configuration) condensed with 5 to 30 moles of ethylene oxide, for example, lauryl alcohol or myristyl condensed with 16 moles of ethylene oxide (EO), condensed tridecanol with 6 moles of EO, myristyl alcohol condensed with about 10 moles of EO per mole of alcohol myristyl, the product of EO condensation with a cut of coconut fatty alcohols containing a mixture of fatty alcohols with alkyl chains of a length ranging from 10 to 14 atoms of carbon, and in which the condensation product contains or either 6 moles of EO per mole of total alcohol or 9 moles of EO per mole of alcohol, and tallow alcohol ethoxylates containing 6 EO to 11 EO per mole of alcohol.

Suitable nonionic surfactants are those Neodol ethoxylates (Shell Co.), which are primary chain alcohols upper aliphatic, which contain approximately 9-15 carbon atoms, such as an alkanol of C 9 -C 11 condensed with 8 moles of oxide ethylene (Neodol 91-8), alkanol C 12 -C 13 condensed with 6.5 moles of oxide of ethylene (Neodol 23-6.5), alkanol of C 12 -C 15 condensed with 12 moles of oxide of ethylene (Neodol 25-12), alkanol of C 14 -C 15 condensed with 13 moles of oxide of ethylene (Neodol 45-13), and similar ethoxylates. These ethoxamers have a value of HLB (balance hydrophobic-lipophilic) of 8-15 and they provide a good emulsification, while the ethoxamers with HLB values less than 8 contain less than 5 groups ethyleneoxy and tend to be poorer emulsifiers and Detergents of worse quality.

Additional satisfactory products resulting from the condensation of ethylene oxide and a water-soluble alcohol are the condensation products of a secondary aliphatic alcohol containing 8 to 18 carbon atoms in a linear or branched chain configuration, condensed with 5 to 30 moles of ethylene oxide. Examples of commercially available non-ionic detergents of the above type are a C 11 -C 15 secondary alkanol condensed or with 9 EO (Tergitol 15-S-9) or with 12 EO (Tergitol 15-S-12) marketed by Union Carbide .

Other suitable non-ionic detergents include condensation products of poly (ethylene oxide) resulting from the condensation of one mole of an alkylphenol containing 8 to 18 carbon atoms in a straight or branched chain alkyl group, with 5 to 30 moles of ethylene oxide. Specific examples of alkylphenol ethoxylates include nonylphenol condensed with 9.5 moles of EO per mole of nonylphenol, dinonylphenol condensed with 12 moles of EO per mole of phenol, dinonylphenol condensed with 15 moles of EO per mole of phenol, and condensed di-isoctylphenol 15 moles of EO per mole of the phenol. Commercially available non-ionic surfactants of this type include Igepal CO-630 (nonyl phenol ethoxylate) marketed by GAF Corporation .

Also among the satisfactory non-ionic detergents are the water soluble products resulting from the condensation of a C 8 -C 20 alkanol with an ether mixture of ethylene oxide and propylene oxide, in which the proportion of weights of ethylene oxide with respect to propylene oxide is 2.5: 1 to 4: 1, preferably 2.8: 1 - 3.3: 1, the total ratio being ethylene oxide and propylene oxide ( including the ethanol or terminal propanol group) of 60% -85%, preferably 70% -80% by weight. These detergents are commercially available from BASF-Wyandotte and a particularly preferred detergent is a product resulting from the condensation of a C 10 -C 16 alkanol with ethylene oxide and propylene oxide, the weight ratio being of ethylene oxide with respect to propylene oxide of 3: 1 and the total alkoxy content being 75%
in weigh.

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Other suitable, non-ionic, soluble detergents in water, which are less preferred, are those marketed with the trade name "Pluronics". The compounds are formed condensing ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol. The weight Molecular of the hydrophobic portion of the molecule is of the order of 950 to 4,000 and preferably 200 to 2,500. The addition of radicals from poly (oxyethylene) to the hydrophobic portion tends to increase the solubility of the molecule as a whole in order to make the water soluble surfactant. The molecular weight of the polymers of blocks varies from 1,000 to 15,000 and the content of poly (oxide of ethylene) may comprise from 20% to 80% by weight. Preferably, these surfactants will be in liquid form and are satisfactory surfactants available in grades L62 and L64

Suitable anionic surfactants, not soapy and water soluble, used in the present compositions, include surfactants or detergents that contain a hydrophobic organic group that generally contains 8 to 26 atoms carbon, and preferably 10 to 18 carbon atoms in their molecular structures, and at least one water solubilizer group, selected from the group of sulphonate, sulfate and carboxylate, to in order to form a water soluble detergent. Normally the group hydrophobic will include or comprise an alkyl or acyl of C_ {8} -C_ {22}. These surfactants are used in water soluble salt form and salt forming cation normally selected from the group consisting of sodium, potassium, ammonium, magnesium and mono-, di- o tri-alkanol (C 2 -C 3) ammonium, sodium, magnesium and ammonium cations being preferred.

Examples of sulfonated anionic surfactants suitable are the well-known mononuclear aromatic sulfonates of a higher alkyl such as benzenesulfonates of a higher alkyl containing 10 to 16 carbon atoms in the higher alkyl group in a linear or branched chain, the toluenesulfonates of a C 8 -C 15 alkyl and the phenolsulfonates of an alkyl of C_ {8} -C_ {15}.

A preferred sulphonate is a linear alkyl benzenesulfonate having a high content of 3 isomers (or a higher digit position) -phenyl, and a correspondingly low content (well below 50%) of isomers 2 (or a digit position minor) -phenyl, that is, in which the benzene ring is preferably largely attached to the 3-position or a larger digit position (eg, the 4, 5, 6 or 7 position) of the alkyl group, and the content of the isomers in which the benzene ring is attached in position 2 or position 1 is correspondingly low. Particularly preferred materials are those set forth in the Patent of
USA 3,320,174.

Other suitable anionic surfactants are olefin sulphonates, which include long chain alkene sulphonates, long chain hydroxyalkane sulphonates or mixtures of alkene sulphonates and hydroxyalkane sulphonates. These olefin sulphonate type detergents can be prepared in a known manner by the reaction of sulfur trioxide (SO3) with long chain olefins containing from 8 to 25, preferably from 12 to 21 carbon atoms, and having the formula RCH = CHR1, in which R is a higher alkyl group of 6 to 23 carbons and R1 is an alkyl group of 1 to 17 carbons or is hydrogen, to form a mixture of sulfones and alkenesulfonic acids which are then treated to convert sulfones into sulphonates. Preferred olefin sulfonates contain from 14 to 16 carbon atoms in the alkyl group R and are obtained by sulfonation of a
α-olefin.

Other examples of suitable surfactants from type of anionic sulfonates are paraffin sulfonates that they contain from 10 to 20, preferably from 13 to 17, carbon atoms. Primary paraffin sulfonates are prepared by making react long chain alpha-olefins and bisulfites, and paraffin sulfonates having the sulfonate group distributed along the paraffin chain are shown in U.S. Pat. No. 2,503,280; 2,507,088; 3,260,744; 3,372,188; and in German Patent 735,096.

Examples of anionic surfactants satisfactory sulfate type are sulfate salts of (C 8 -C 18) alkyl and sulfate salts (C 8 -C 18) alkyl ether polyethenoxylated having the formula R (OC 2 H 4) n OSO 3 M in which n is 1 to 12, preferably 1 to 5, and M is a metal cation selected from the group consisting of sodium, potassium, ammonium, magnesium and ions of mono-, di- and tri-ethanol-ammonium. Sulfates of alkyl can be obtained by sulfating the alcohols obtained by reducing glycerides from coconut or tallow oil or from their mixtures, and neutralizing the resulting product.

On the other hand, alkyl ether sulfates polyethenoxylated are obtained by sulfating the condensation product of ethylene oxide with an alkanol of C_ {8} -C_ {18} and neutralizing the product resulting. The alkyl sulfates can be obtained by sulfating the alcohols obtained by reducing oil glycerides from coconut or tallow or mixtures thereof and neutralizing the resulting product. On the other hand, polyethenoxylated alkyl ether sulfates are obtained by sulfating the condensation product of ethylene oxide with a C 8 -C 18 alkanol and neutralizing The resulting product. Polyethenoxylated alkyl ether sulfates differ from each other in the number of moles of ethylene oxide that They reacted with one mole of alkanol. Alkyl sulfates preferred and preferred polyethenoxy alkyl ether sulfates they contain 10 to 16 carbon atoms in the alkyl group.

Sulfates of (C 8 -C 12) alkyl phenyl ether polyethenoxylated containing 2 to 6 moles of ethylene oxide in the molecule are also suitable for use in the compositions of the invention. These surfactants can be prepared by making react an alkylphenol with 2 to 6 moles of ethylene oxide and sulphating and neutralizing the resulting ethoxylated alkylphenol.

Other suitable anionic surfactants are those (C 9 -C 15) alkyl carboxylates - ether polyethenoxylated having the structural formula R (OC 2 H 4) n OXCOOH in which n is a number from 4 to 12, preferably from 5 to 10, and X is selected from the group consisting of

3

where R_ {1} is a group C 1 -C 3 alkylene. The compounds preferred include (C 9 -C 11) alkyl ether polyethenoxy (7-9) C (O) CH 2 CH 2 COOH, (C 13 -C 15) alkyl ether polyethenoxy (7-9) -

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4

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Y (C 10 -C 12) alkyl ether polyethenoxy (5-7) CH2COOH. These Compounds can be prepared by condensing ethylene oxide with a appropriate alkanol and reacting the product of this reaction with chloroacetic acid to form carboxylic acids attached to the ether as shown in US Pat. no. 3,741,911, or with succinic anhydride or phthalic anhydride. Obviously these anionic surfactants will be present in the form of acid or in salt form depending on the pH of the final composition, the salt forming cation the same as in the case of the others surfactants anionic

The co-surfactant of the methyl ester type ethoxylated, soluble in water, is present in the composition in a concentration of 0.5% to 10% by weight, and more preferably of 1.0% by weight to 8% by weight. The ester type co-surfactant of Ethoxylated methyl is represented by the structure:

5

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where n is a number from 6 to 12, preferably from 8 to 10, and x is a number selected from the group consisting of 4, 6, 8 and 10, in which the preferred number is 6 or 8.

In addition to the components above described, required for the formation of the present composition, the compositions of this invention can often contain, and preferably contain one or more additional components that they serve to improve the total effectiveness of the product.

One of those components is an organic salt or inorganic or an oxide of a multivalent metal cation, in particular, Mg ++. Salt or metal oxide provides several benefits that include improved cleaning efficiency with use of the diluted composition, particularly in soft water areas. Magnesium sulfate, anhydrous or hydrated (e.g., heptahydrate), is especially preferred as magnesium salt. Good results have also been obtained with magnesium oxide, magnesium chloride, magnesium acetate, magnesium propionate e magnesium hydroxide. These magnesium salts can be used with formulations at neutral pH or at acidic pH since the hydroxide of Magnesium does not precipitate at these pH levels.

Although magnesium is the multivalent metal preferred with which salts are formed (including oxide and hydroxide), other metal ions can also be used versatile with the condition that its salts are non-toxic and are soluble in the aqueous phase of the system at the pH level wanted.

The present compositions may include a proportion of 0.1% to 2.5%, preferably 0.15% to 2.0% in weight of the composition, of a fatty acid of C 8 -C 22 or a fatty acid soap such as foam suppressor The addition of a fatty acid or soap fatty acids provides an improvement in the rinse capacity of The composition is already applied in pure form or in diluted form. Generally, however, it is necessary to increase the level of co-surfactant to maintain product stability when the Fatty acid or soap are present. Yes in the present compositions a proportion of a fatty acid greater than the 2.5% by weight, the composition will become unstable at temperatures low and will also present an unpleasant smell. As an example of fatty acids that can be used as such or in the form of soap, are may mention fatty acids from distilled coconut oil, acids fatty foods of the type of "mixed vegetables" (eg, with a high percentage of saturated, monounsaturated and / or C 18 chains polyunsaturated); oleic acid, stearic acid, palmitic acid, eicosanoic acid and similar fatty acids, being generally acceptable fatty acids that are 8 to 22 carbon atoms When a fatty acid of C 8 -C 22 or a fatty acid soap is included in the compositions as a foam suppressor, it has been found that for the purposes of the invention it is useful to also add a neutralized poly (acrylic acid) polymer, with a weight low molecular ranging from about 10,000 to 45,000

The liquid cleaning composition in Microemulsion of this invention, if desired, may also contain other components either to provide an additional effect or to make the product more attractive to the consumer. The following Components are mentioned by way of example: Paints and dyes in amounts up to 0.5% by weight; bactericidal substances in amounts up to 1% by weight; preservatives and agents antioxidants, such as formaldehyde, 5-bromo-5-nitro-dioxan-1,3; 5-chloro-2-methyl-4-isothiazolin-3-one; 2,6-di-tert-butyl-p-cresol, etc., in amounts of up to 2% by weight; and adjusting agents of pH, such as sulfuric acid or sodium hydroxide as appropriate. In addition, if it is desired to obtain opaque compositions, a opacifying agent in a proportion of up to 4% by weight.

The final essential component of the compositions liquid microemulsion cleaners of the invention, which has Improved properties of interfacial tension, is water. The proportion of water in the multi-purpose surface cleaning composition hard or in the cleaning composition for hard surfaces in microemulsion is usually in the range of 10% to 97% in weight, preferably 70% to 97% by weight.

In the final form, liquid microemulsion cleaning compositions exhibit stability at lower temperatures and higher temperatures. More specifically, these compositions remain transparent and stable in the range of 5 ° C to 50 ° C, especially 10 ° C to 43 ° C. These compositions exhibit a pH in the acidic range or in the neutral range depending on the end use for which it is intended. Liquids are easily discharged and exhibit a viscosity in the range of 6 to 60 milliPascals.second (mPa.s) measured at 25 ° C with a Brookfield RVT Viscosimeter viscometer using a spindle no. 1 rotating at 20 RPM. Preferably, the viscosity is maintained in the range of 10 mPa.s to 40 mPa.s.

The compositions are ready for use direct or can be diluted as appropriate, and in any of the two cases or no clarification is required or only one minimum rinse, and leave substantially no residue or scratches. In addition, because the compositions are agent free detergent builders, such as metal polyphosphates alkaline, are environmentally acceptable and provide a better "shine" on hard surfaces cleaned.

When they are intended for use in pure form, the Liquid compositions can be pressure packed in a container spray or in a pump type sprayer for the type of application called spraying and wiping.

Because the prepared compositions are aqueous liquid formulations, and since mixing is not required particular to form the compositions, the compositions are easily prepare by simply mixing all components in a suitable container or container. The mixing order of the components is not particularly important and usually the different components can be added successively or all to the time, or in the form of aqueous solutions of each of the primary surfactants, or all of them, and the co-surfactants of type of ethoxylated methyl esters can be prepared by separate and mix with each other. Magnesium salt, or other compound Multivalent metal, when present, can be added in form of its aqueous solution or can be added directly. It is not it is necessary to use high temperatures in the constitution stage and The ambient temperature is sufficient.

The present compositions exclude explicitly alkali metal silicates and agents reinforcers containing alkali metals such as polyphosphates of alkali metals, alkali metal carbonates, phosphonates of alkali metals and alkali metal citrates because these materials, if used in the present composition, would make the composition had a high pH, and also left residues on The surface that is cleaned.

The following examples illustrate the liquid cleaning compositions of the described invention. The compositions used as examples are illustrative only and do not limit the scope of the invention. Unless specified otherwise, the proportions that appear in the examples and in other places in this specification are given by weight.

Example 1

The following compositions in% by weight are prepared by simple mixing at 25 ° C:

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TO B C D AND Sulphonate paraffin 2.4 2.4 2.4 2.4 2.4 Plurafac LF300 non-ionic, BASF 1.6 1.6 1.6 1.6 1.6 Hexanol EO5 4 0 0 0 0 C6-C10 MEE surfactant EO4 0 4 0 0 0 C6-C10 MEE surfactant EO6 0 0 4 0 0 C6-C10 MEE surfactant EO8 0 0 0 4 0 C6-C10 MEE surfactant EO10 0 0 0 0 4 Fatty acid coconut 0.3 0.3 0.3 0.3 0.3 MgSO4 \ cdot 7H 2 O 0.9 0.9 0.9 0.9 0.9 Fragrance 0.7 0.7 0.7 0.7 0.7 Water until until until until until to complete to complete to complete to complete to complete Absorption of oil STD best same slightly worst worst Capacity of coupling STD worst same same same Stability thermal STD worst same same same Court of the grease STD - same - - Foam Collapse (200 ppm) STD - same - -

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New test methodology: The coupling capacity is expressed as the power of the solvant (C6EO5 or MEE) to act ONLY as the coupling agent at the base consisting of anionic surfactant / surfactant
Vo non-ionic / fragrance.

Method of measuring coupling capacity Purpose

Evaluate the coupling capacity of new materials within a surfactant base formula anionic / nonionic surfactant.

materials

 \ hskip0,4cm Matrix / base fla % in weigh $ (60%) 2 Dobanol 91-5 2 MgSO 4 • H 2 O 0.75 Fragrance Hemisphere 0.7 DI water until 96

Sample Preparation

Sample % in weight Matrix 96 Material of test 4

Titration

One hundred grams of sample are titled with Butyldiglycol (DEGMBE) until the sample is transparent.

Calculation

The results are expressed in weight (g). How much The lower the amount of DEGMBE, the better the ability to coupling of the test material.

Measurement method of oil absorption Purpose

Evaluate the oil absorption capacity of APC compositions.

materials

Petroleum ether 100-140 ex. Vel.

Titration

Ten grams of pure product are titrated with ether of oil until the sample darkens / cloudiness. Are added repeatedly 2-3 drops each time of petroleum ether and wait 2 minutes to determine the end point.

Calculation

Capacity of oil absorption (%) = \ frac {\ text {petroleum ether by weight (g)}} {10 + \ text {petroleum ether by weight (g)}} x 100

Note: A criterion to determine if a concrete composition is a microemulsion, is that

\ frac {\ text {ability to oil absorption}} {Al (%)} must be greater than 0.66.

Claims (1)

1. A microemulsion cleaning composition stable comprising approximately by weight: (a) a proportion of 0.5% by weight to 6% by weight of a nonionic surfactant containing ethoxylate and / or groups propoxylate; (b) a proportion of 0.1% by weight to 8% by weight of an anionic surfactant; (c) a proportion of 0.5% to 8% of a co-surfactant of the ethoxylated methyl ester type, miscible in water, which is represented by the structure: 6 where n is a number from 6 to 12, and x is a number selected from the group consisting of 6 or 8; (d) a proportion of 0.1% to 2.5% of an acid fatty; (e) a proportion of 0.1% to 6% sulfate of magnesium heptahydrate; (f) a proportion of 0.1% to 5% of a perfume insoluble in water, an essential oil or an organic compound insoluble in water that has 8 to 18 carbon atoms; Y (g) the remaining proportion being water, in which the composition does not contains: - choline chloride, polyethylene glycol, poly (vinyl pyrrolidone), or an ethoxylated polyhydric alcohol, totally or partially esterified, - a monoester having 8 to 20 atoms of carbon and that does not contain 6 or 8 ethoxylate groups, or a diester organic that has 10 to 40 carbon atoms and does not contain 6 or 8 ethoxylate groups, - an aliphatic carboxylic acid of C 3 -C 6 or a glycol ether, - alkali metal silicates and agents reinforcers containing an alkali metal such as polyphosphates alkali metal, alkali metal carbonates, metal phosphonates alkali and alkali metal citrates.