ES2227577T5 - DISHWASHER COMPOSITIONS WITH IMPROVED GELIFICATION RESISTANCE. - Google Patents

Abstract

DISHWASHED LIQUID COMPOSITIONS FOR DISHWASHERS CONTAINING A ROBUST SURFACTANT SYSTEM, A SOLVENT FOR CONTROLLING VISCOSITY, A HYDROTROPE TO ENSURE PROPER SOLUBILITY OF THE COMPOSITION AND AN EFFECTIVE AMOUNT OF AN ANTIGELIFYING COMPILATION LABEL.

Description

Dishwasher compositions with resistance to Enhanced gelation

Technical field

The invention relates to compositions liquid dishwasher The compositions have a system effective surfactant, are relatively soluble in water and have a enhanced gelation resistance.

Background

The liquid dishwashing compositions that they have good fat removal benefits are highly desired by consumers, and therefore, it is necessary that you Compositions comprise an effective surfactant system. Without However, such effective surfactant systems produce an increase in the viscosity that makes such compositions not convenient for use. Therefore, solvents are added that decrease the viscosity of the composition to a value acceptable. But a problem that occurs with these compositions is that solvents tend to evaporate over time and thus Compositions tend to gel.

Other requirement of dishwasher compositions is that they must be easy to dissolve in water before using them, and this is also somewhat contradictory with the presence of a effective surfactant system. to get this need, it formulate compositions further comprising a hydrotrope which improves the solubility (and stability) of the composition. Without However, it has now been found that such compositions that comprise a hydrotrope are even more likely to gel, compared to the same compositions without hydrotrope.

It is known from the document EP-A-0 059 043 than the compositions comprising a salt of an alcohol sulfate ether can be diluted without many problems due to gel formation, if found present an adequate amount of a molecular weight compound 500 to 10,000 comprising at least one polyalkylene glycol chain and at least two ether bonds per seven carbon atoms.

It is also known that the addition of salts Inorganic such as chlorine salts can relieve the effect gelling to some degree. However, there are inconveniences for the use of inorganic salts, specifically, they can affect negatively to the solubility of the compositions, and they can also cause formulability or corrosivity problems.

Therefore, an objective of the present invention is to provide liquid dishwashing compositions stable, comprising an effective surfactant system, which are easy to dissolve and have improved resistance to gelation

In response, it has now been found that the formulation - in a composition comprising a system effective surfactant together with a solvent and a hydrotrope of a polyalkylene glycol antigelifying polymer satisfies that need.

Summary of the invention

The compositions of the present invention are liquid dishwashing compositions comprising:

- from 15% to 60% surfactant of alkylethoxysulfate;

- from 0% to 30% of an oxide surfactant of amine;

- from 0% to 2.0% magnesium ions;

- an effective amount of a solvent;

- an effective amount of a hydrotrope; Y

- an antigelifying amount of a polymer of polyalkylene glycol type.

In addition, the invention encompasses a method of washing Dishes with these compositions.

Detailed description of the invention Alkylethoxysulfate Surfactant

As an essential component, the compositions herein they comprise an alkylethoxysulfate surfactant. Such surfactants are according to formula (1)

(1) R 1 O (CH 2 CH 2 O) n SO 3 M

where R_ {1} represents a straight or branched chain alkyl group or an alkenyl group that it has 9 to 15 carbons, n represents 0.5 to 7 of real number in average, and M shows an alkali metal, alkaline earth metal, ammonium group or ammonium group substituted with alkanol. If the number of carbons of R1 is less than 9, the detergency is insufficient, and if it is more than 16, the low temperature stability of the Composition deteriorates considerably and is not preferable. Especially, the preferred number of carbons is 10 to 13. In addition, when the number of moles of adduct n of ethylene oxide in the formula (1) is less than 0.5, increases the stimulus at hand and skin and is not preferable, while if it is more than 3, the detergency It deteriorates strongly, which is not desirable. Therefore the desired range of the number of moles of ethylene oxide adduct is 0.5 to 3.

The compositions of the present invention comprise from 15% to 60%, by weight of the total composition of such surfactant, or mixtures thereof, preferably from 15% to 40%, the most preferably from 20% to 30%.

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Amine Oxide Surfactant

As an optional but preferred component, the compositions of the invention may further comprise a amine oxide surfactant. Such surfactants are according to the formula (2)

one

in which R2 represents a straight or branched chain alkyl group or an alkenyl group that it has 10 to 16 carbons, and R 3 and R 4 represent a group methyl or an ethyl group respectively. If the carbon number of R2 is less than 10, the detergency of the composition is low, and if It is more than 16, low temperature stability deteriorates considerably, which is not preferable.

The compositions of the present invention comprise from 0% to 30%, by weight of the total composition of such surfactant, preferably from 1.5% to 15%, most preferably from 1.5% to 10%.

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Magnesium Ions

As another optional but preferred component of the compositions of the invention can be added from 0% to 2.0%, preferably 0.1% to 2%, most preferably 0.3% to 2% in composition weight, from magnesium ions to the compositions liquid detergents of the invention to improve the stability of the product, as well as to improve foaming and softness of the skin.

It is preferred that magnesium ions be introduce by neutralization of the acid form of the alkylethoxylated surfactants with an oxide suspension of magnesium or magnesium hydroxide in water. Normally this method is limited by the amount of anionic surfactants in the composition. An alternative method is to use MgCl2, MgSO4 or other inorganic Mg salts. These materials are less desirable. since they can cause corrosivity problems (chloride salts), decrease the solubility of the formulations, or cause problems of formulability / stability in the compositions. For these reasons, it is desirable to limit the addition of inorganic salts to less than 2%, preferably less than 1% by weight of the inorganic counterion anionic

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Solvent

As another essential component, the compositions of the invention comprise a solvent in an effective amount of so that the viscosity of the compositions herein is 50 cps at 2000 cps, preferably 100 cps at 450 cps, the most preferably from 100 cps to 350 cps, measured at 20 ° C, with a Brookfield viscometer, spindle no. 18.

Solvents suitable for use herein include low molecular weight alcohols such as mono- alcohols and C 1 -C 10 dihydroxy, preferably C 1 -C 4, preferably ethyl alcohol, Isopropyl alcohol, propylene glycol and hexylene glycol.

The compositions of this memory typically comprise from 3% to 20% by weight of the total composition of a solvent, or mixtures thereof, preferably 3% to 15%, the most preferably 5% to 10%.

Hydrotrope

As another essential component, the compositions of the invention comprise a hydrotrope in an effective amount such that the compositions are appropriately soluble in water. By properly soluble in water, it is understood that the product is dissolves quickly enough in water as determined by the habit of Washing and conditions of use. Products that do not dissolve quickly in water can lead to negative effects on the behavior when it comes to fat cleaning, foaming, ease of product rinse glass plates / material etc, or the product left in the glass plates / material after washing.

Hydrotropes suitable for use herein include anionic type hydrotropes, particularly sodium, potassium and ammonium xylenesulfonates (preferred), sodium, potassium and sodium toluenesulfonates, cumenesulfonates of sodium, potassium and ammonium (more preferred), and mixtures thereof, and related compounds (as described in US Pat. 3,915,903). Preferred hydrotropes are selected from sodium cumenesulfonate, sodium xylenesulfonate, toluenesulfonate of sodium and its mixtures.

Typically, the compositions of the invention comprise from 1.5% to 20% by weight of the total composition of a hydrotrope, or mixtures thereof, preferably from 3% to 10%, the most preferably from 3% to 6%.

Antigelifying polymer

As another essential component, the compositions of the invention comprise an antigelifying polymer that improves the resistance of the compositions to gelation. Polymers suitable for use herein have a molecular weight of at less than 500, preferably 500 to 20,000, more preferably 1,000 to 5,000, most preferably 1,000 to 3,000.

The necessary amount of polymer antigelificante can be determined easily by test and error, but generally, the compositions of this report they comprise from 0.5% to 10%, typically 0.5 to 6% by weight of the total composition of an antigelifying polymer, or mixtures thereof, preferably 0.5% to 4%, most preferably 1.5% to 3%.

Suitable polymers to use are polyalkylene glycols, preferably polyethylene glycol and polypropylene glycol

Optional ingredients

The compositions of this memory may further comprise a series of optional ingredients described to continuation.

The compositions of this invention contain preferably some co-surfactants to aid foaming, detergency and / or softness. Various categories are included in this category. anionic surfactants commonly used in detergents liquid or gel dishwasher. Examples of co-surfactants anionics that are useful in the present invention are the types following:

(1) Alkylbenzenesulfonates in which the group alkyl contains 9 to 15 carbon atoms, preferably 11 at 14 carbon atoms, in linear chain or chain configuration branched. An alkylbenzene sulfonate especially Preferred contains about 12 carbon atoms. These Surfactants are described in detail in US Pat. 2,220,099 and 2,477,383.

(2) Alkylsulfates obtained by sulfating a alcohol having 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms The alkyl sulfates have the formula ROSO 3 -M +, where R is the alkyl group C 8 -22 and M is a mono- and / or cation divalent

(3) Paraffin sulphonates having 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms, in the alkyl rest. These surfactants are commercially available as Hostapur SAS of Hoechst Celanese.

(4) Olefin sulphonates having 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms. The U.S. Patent No. 3,332,880 contains a description of suitable olefin sulfonates.

(5) Alkylglyceryl ether sulfonates having 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms, in the alkyl rest.

(6) Sulfonates of fatty acid esters of the formula:

R_ {1} -CH (SO_ {3} {} - M +) CO 2 R 2

in which R1 is an alkyl linear or branched from approximately C 8 to C 18, preferably C 12 to C 16, and R 2 is a linear alkyl or branched from about C 1 to C 6, preferably C 1 mainly, and M + represents a mono- or cation divalent

(7) sulfates of secondary alcohols that have 6 to 18, preferably 8 to 16, carbon atoms.

Other suitable co-surfactants used here They are:

(8) Fatty acid amide surfactants that They have the formula:

2

in which R 6 is a group alkyl containing from 7 to 21, preferably from 9 to 17, atoms of carbon and each R 7 is selected from the group consisting of hydrogen, C 1 -C 4 alkyl, hydroxyalkyl C 1 -C 4 and - (C 2 H 4 O) x H, in which x varies from 1 to approximately 3.

(9) Fatty acid amide surfactant Polyhydroxy of the structural formula:

3

in which R1 is H, C 1 -C 4 hydrocarbyl, 2-hydroxyethyl, 2-hydroxypropyl, or its mixture, preferably C 1 -C 4 alkyl, more preferably C 1 or C 2 alkyl, most preferably C 1 alkyl (that is, methyl); and R2 is a C 5 -C 31 hydrocarbyl, preferably C 7 -C 19 alkyl or alkenyl chain linear, more preferably alkyl or alkenyl C_ {9} -C_ {17} linear chain, the most preferably, alkyl or alkenyl C 11 -C 17 straight chain, or mixtures thereof; Y Z is a polyhydroxyhydrocarbyl having a hydrocarbyl chain linear with at least 3 hydroxyls connected directly to the chain, or its alkoxylated derivative (preferably ethoxylated or propoxylated). Z will preferably be derived from a reducing sugar in a reductive amination reaction; more preferably, Z is a Glicityl Suitable reducing sugars include glucose, fructose, maltose, lactose, galactose, mannose and xylose. Preferably Z is select from the group consisting of -CH 2 - (CHOH) n -CH 2 OH, -CH (CH 2 OH) - (CHOH) n-1 -CH 2 OH, -CH 2 - (CHOH) 2 (CHOR) (CHOH) -CH 2 OH,  where n is an integer from 3 to 5 inclusive, and R 'is H or a cyclic or aliphatic monosaccharide, and its alkoxylated derivatives. The more preferred are the glicitilos in which n is 4, in particular, -CH 2 - (CHOH) 4 -CH 2 OH.

In formula (I), R 1 can be, by example, N-methyl, N-ethyl, N-propyl, N-isopropyl, N-Butyl, N-2-hydroxyethyl or N-2-hydroxypropyl.

R2 -CO-N < it can be, for example, cocamide, stearamide, oleamide, lauramide, myristamide, capricamide, palmitamide, seboamide, etc.

Z can be 1-deoxyglucityl, 2-deoxifructityl, 1-deoximaltityl, 1-deoxylactityl, 1-deoxygalactityl, 1-deoxyanityl, 1-desoximaltotriotitil, etc.

(10) Betaine detergent surfactants that They have the general formula:

R-N (+) (R 1) 2 -R 2 COO (-)

in which R is a hydrophobic group selected from the group consisting of alkyl groups containing from 10 to 22 carbon atoms, preferably from 12 to 18 atoms of carbon, alkylaryl and arylalkyl groups containing a number similar carbon atoms, with a benzene ring that is treated as equivalent to about 2 carbon atoms, and similar structures interrupted by amido or ether bonds; every R1 is an alkyl group containing from 1 to about 3 carbon atoms; and R2 is an alkylene group containing 1 at about 6 atoms of carbon.

(11) Ethylene oxide condensates, which are they can define broadly as compounds produced by the condensation of ethylene oxide groups (hydrophilic by nature) with an organic hydrophobic compound, which can be aliphatic or aromatic alkyl by nature. The length of the hydrophilic or polyoxyalkylene radical that condenses with any particular hydrophobic group can be easily adjusted to produce a water soluble compound that has the desired degree of balance between hydrophilic and hydrophobic elements.

Examples of such oxide condensates of Suitable ethylene as soap stabilizers are the condensation products of aliphatic alcohols with oxide ethylene. The alkyl chain of the aliphatic alcohol can be linear or branched, and usually contains about 8 to about 18, preferably about 8 to approximately 14 carbon atoms for better behavior as soap stabilizers, with the oxide of ethylene in amounts of about 8 moles to about 30, preferably from about 8 to about 14 moles of ethylene oxide per mole of alcohol.

(12) Quaternary ammonium surfactants cationic formula:

[R 1 (OR 2) y] [R 3 (OR 2) y] 2 R 4 N + X -

or amine surfactants of the formula:

[R 1 (OR 2) y] [R 3 (OR 2) y] R 4 N

in which R1 is a group alkyl or alkylbenzyl having about 6 to approximately 16 carbon atoms in the alkyl chain; every R2 is selected from the group consisting of -CH2CH2, -CH 2 CH (CH 3) -, -CH 2 CH (CH 2 OH) -, -CH 2 CH 2 CH 2 -, and mixtures thereof; each R3 is select from the group consisting of alkyl C 1 -C 4, hydroxyalkyl C 1 -C 4, benzyl and hydrogen when and is not 0; R 4 is the same as R 3 or an alkyl chain in which the total number of carbon atoms of R 1 plus R 4 is of about 8 to about 16, each and is about 0 to about 10, and the sum of the values of y is about 0 to about 15; and X is any anion compatible.

In addition to optional co-surfactants described above, the compositions may contain other optional components suitable for use in the compositions liquid dishwashers such as perfume, dyes, opacifiers, enzymes, detergency builders and chelators, and media pH absorbers, so that these compositions of this memory generally have a pH of 5 to 11, preferably 6.5 to 8.5, most preferably 7 to 8.

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Method

In the methodical aspect of this invention, Dirty dishes get in touch with an effective amount, typically from about 0.5 ml. to about 20 ml. (by 25 treated dishes), preferably about 3 ml. to approximately 10 ml., of the detergent composition herein invention. The actual amount of liquid detergent composition used It will be based on the user's judgment, and will typically depend on factors such as the formulation of the composition in a product particular, including the concentration of active ingredients in the composition, the number of dirty dishes to clean, the degree of dirt of the dishes, and the like.

The formulation of a particular product, at its Once, it will depend on several factors, such as the intended market (i.e., USA, Europe, Japan, etc.) for the product of the composition.

Generally, about 0.01 ml. to about 150 ml., preferably about 3 ml. to approximately 40 ml. of a liquid detergent composition of the invention is combined with approximately 2,000 ml. to about 20,000 ml., more typically about 5,000 ml. to approximately 15,000 ml. of water in a bathroom that has a volumetric capacity in the range of approximately 1,000 ml. to about 20,000 ml., more typically about 5,000 ml. to approximately 15,000 ml. Dirty dishes are submerged in the bath containing the diluted compositions obtained, where clean by contact of the dirty surface of the dish with a cloth, Sponge or similar item. The rag, sponge, or similar item is you can dip into the mixture of detergent composition and water before of contacting the surface of the plate, and typically puts in contact with the surface of the plate during a period of time that varies from about 1 to about 10 seconds, although the real time will vary with each application and user. He rag, sponge, or similar item contact with the surface of the dish is preferably accompanied by simultaneous rubbing of the surface of the plate.

Another method of use will include submerging dirty dishes in a water bath without any dishwashing detergent liquid. A device, such as a sponge, that absorbs the dishwashing liquid detergent, placed directly in a separate amount of undiluted dishwashing liquid composition over a period of time that typically varies from about 1 to about 5 seconds. The device absorbent, and consequently the liquid dishwasher composition undiluted, can then be contacted individually with the surface of each of the dirty dishes to remove said dirt. The absorbent device is typically contacted with each surface of the dishes for a period of time that it varies from about 1 to about 10 seconds, although the Real time application will depend on factors such as grade of dirt on the plate. The contact of the absorbent device with the dish surface is preferably accompanied by rubbing simultaneous.

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Examples

The following compositions are obtained mixing the ingredients indicated in the proportions indicated.

4

5

6

7

8

9

10

eleven

Claims (9)

1. A liquid dishwashing composition that understands: - from 15% to 60% of a surfactant of alkylethoxysulfate; - from 0% to 30% of an oxide surfactant of amine; - from 0% to 2% magnesium ions; - a solvent in an effective amount so the viscosity of the composition is 50 cps to 2,000 cps. - a hydrotrope in an effective amount so that the compositions are appropriately soluble in water; Y - an antigelifying amount of a polymer of polyalkylene glycol type that improves the resistance of compositions to gel.

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2. A composition according to claim 1, which includes: - from 15% to 60% of said surfactant of alkylethoxysulfate; - from 0% to 30% of said oxide surfactant of amine; - from 0% to 2% of said magnesium ions; - from 3% to 20% of said solvent; - from 1.5% to 20% of said hydrotrope; Y - from 0.5% to 6% of said type polymer polyalkylene glycol.

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3. A composition according to any of the previous claims, having a viscosity of 50 cps at 2,000 cps 4. A composition according to any of the previous claims, wherein said type polymer Polyalkylene glycol has a molecular weight of 500 to 20,000. 5. A composition according to any of the previous claims, comprising from 0.5% to 10% of said polyalkylene glycol type polymer. 6. A composition according to any of the previous claims, wherein said hydrotrope is select from the group consisting of anionic type hydrotropes, preferably sodium cumenesulfonate, sodium xylenesulfonate, sodium toluenesulfonate and mixtures thereof. 7. A composition according to any of the previous claims, wherein said solvent is select from the group consisting of alcohols C 1 -C 10 monohydroxylated and dihydroxylated and their mixtures 8. A method for washing dishes, in which dilute 0.01 ml to 150 ml of a composition according to any of the previous claims in 2,000 ml to 20,000 ml of water, and the dishes are immersed in the diluted composition obtained in this way, and cleaned by contacting the dirty surface of the plate with a rag, sponge or similar item. 9. A method of washing dishes, in which dishes are immersed in a water bath, absorbed on a device an effective amount of a composition according to any of claims 1-8, and the device with the absorbed composition is contacted individually with the surface of each of the dirty dishes.