CN106536700A - Stain treatment compositions - Google Patents

Abstract

A stain removal composition comprising an arginine alkyl ester.

Description

Sewage Treatment Composition

The present invention relates to soil release compositions for use on soils active under ambient conditions.

It is an object of the present invention to remove soil from soiled substrates.

US3707505 discloses an enzyme-containing detergent composition which has enhanced enzyme storage capacity due to the presence of N-acyl amino acids having 6-20 carbon atoms and their salts and esters group of fatty acids. Example 10 describes a method by adding to a mixture of 15 g lauryl ether sulfate, 10 g alkylamide of coconut oil fatty acid, 5 g ethanol and 2 g N-myristoyl-L-arginine butyl ester lactate Liquid detergent obtained with 0.1 g of protease and 1 g of amylase.

In a first aspect, the present invention provides a stain removal composition comprising an arginine ester compound and a surfactant. Preferably, the arginine ester compound comprises an alkyl arginine ester, more preferably the compound is methyl arginine or ethyl arginine, or any combination thereof.

In a second aspect, the present invention provides a method of removing a soil from a soiled substrate fabric comprising the step of applying to said soil a soil removal composition of the first aspect of the invention.

In a third aspect, the present invention provides a pretreatment device comprising (i) a reservoir for storing the stain removal composition of the first aspect of the present invention and (i) for applying said composition to a stain on a substrate The dispenser of said pretreatment device is preferably suitable for use in the method of the second aspect.

In a further aspect, the present invention provides the use of an alkyl arginine ester compound, preferably in combination with a surfactant, for removing soil from a soiled substrate.

With the present invention, soil removal at low temperatures is substantially improved and thus provides cost effective improved household eg laundry cleaning in areas where ambient washing is done out of habit or necessity. Improved wash performance at lower temperatures is generally desired, but improved low temperature performance will also help curb the adoption of hot water washing in these countries as living standards improve and more people are able to buy Affordable base washing machines, hot water washing is on the rise. The present invention provides stain removal performance on soils and/or soils during ambient temperature cleaning (using low temperature wash liquids) without critical consideration of the temperature sensitivity of the ingredients during storage. Formulations can thus be designed more freely based on other considerations.

As used herein, the term "substrate" includes fabrics, and clothing as well as other surfaces such as tableware, crockery and other household hard surfaces.

As used herein, the terms "arginine ester compound" and "arginine alkyl ester compound" are intended to include any suitable compound, including stereoisomeric and racemic forms, derivatives and substituted derivatives, and mixtures thereof .

The term "active under ambient conditions" is intended to mean less than 25 degrees Celsius and preferably 22 degrees Celsius or lower, more preferably 15 degrees Celsius or lower, but always above 1 degree Celsius, and "active" means that the is valid.

As used herein, the term "decontamination" refers to removal as measured in terms of elimination units or elimination index. For visual (by human eye) effect, effective stain removal is indicated by a removal equal to or greater than 2 units of elimination and preferably greater than or equal to 5 units.

As used herein, the abbreviation "wt%" means "% by weight". All percentages mentioned herein are by weight calculated relative to the total composition, unless otherwise indicated.

Soil can include biological material such as fat, oil, blood, starch, and combinations thereof.

The method of the invention preferably comprises an aqueous washing process. Accordingly, it is preferred that the method comprises the step of adding water to the composition to form an aqueous wash liquor.

Preferably, the method comprises topically applying the composition to the soiled or stained area of the substrate. The method may be a pretreatment method followed by an aqueous washing step. The pretreatment step may be performed without further addition of any water other than any water contained in the composition. Alternatively or additionally, the pretreatment process may comprise the step of soaking the substrate in an aqueous solution to which the treatment composition has been added. Optionally, the pretreatment process may include the step of applying the composition by spraying, brushing, rubbing or scrubbing.

The second step of the method of the invention may be a "main" wash and may be a manual washing process and/or a washing process in a washing machine. Any suitable detergent composition can be used in the second step. Preferably, the detergent composition comprises one or more surfactants and/or other functional ingredients, adjuvants etc. as described below.

As far as pretreatment according to the invention is concerned, subsequent steps may not require the further application of an alkyl arginine ester compound.

Preferably, the duration of the washing process of the invention is less than 90 minutes, more preferably less than 60 minutes and most preferably less than 30 minutes. In pretreatment embodiments, the pretreatment step is preferably less than 5 minutes, and more preferably less than 2 minutes.

For the treatment of beef and lard soils, the alkyl arginine ester compound is preferably present in the wash liquor at a concentration of 0.01 mg/ml to 10 mg/ml, more preferably at a concentration of 0.31 mg/ml to 0.62 mg/ml. For the treatment of frying fat and milk fat, the concentration of the methyl arginine/ethyl arginine compound in the wash liquor is preferably from 0.15 mg/ml to 10 mg/ml.

Preferably, the alkyl arginine ester compound is present in any composition of the invention at a concentration of 40 mg to 5000 mg per dose, preferably 320 mg to 4000 mg per dose. The compositions are provided in single dose form or in multi-dose, free-flowing forms (powder, liquid, gel, paste, etc.) which are measured out by the consumer using a dosing device. The dosage may be from 10ml to 100ml.

Preferably, the wash liquid has a pH in the range of 4-9.5.

The pre-treatment device may be any suitable device, such as a roll-on applicator or tube, spray, aerosol, paste, pump dispenser, or spot treatment pen or brush, among others. The pre-treatment device may include a scrubbing member having brushes, bristles, tufts, protrusions, reliefs, etc., or any combination thereof, to further aid in the application of the detergent composition to the substrate.

Preferably, the treatment composition is active under ambient conditions. Correspondingly, the temperature of the wash liquid step of the water washing process is therefore always below 40°C, preferably below 30°C, more preferably below 25°C, more preferably below or equal to 22°C during washing (but not including drying) , Still more preferably 15°C or lower. It is environmentally and economically advantageous to encourage low temperature wash liquids.

The treatment compositions of the present invention and/or any detergent compositions used subsequently may comprise any of the following ingredients.

The surfactant may be a synthetic surfactant, or a biosurfactant synthesized by bacteria, fungi, or other microbial microorganisms. The biosurfactant preferably comprises a microbially derived biosurfactant. Preferably, it comprises a glycolipid biosurfactant which may be a rhamnolipid or a sophorolipid or a trehalolipid or a mannose erythritol lipid (MEL). Alternatively, the biosurfactant may advantageously comprise cellobiose, peptidyl biosurfactants, lipoproteins and lipopeptides (such as surfactin), fatty acids such as corynomucolic acid (preferably with a hydrocarbon chain C ₁₂ -C ₁₄ ), phospholipids (e.g., phosphatidylethanolamine produced by Rhodococcus erythropolis growing on n-alkanes, which causes a reduction in the interfacial tension between water and hexadecane to less than 1 mN m-1 and a CMC of 30 mg L-1) (Kretschner et al., 1982) and coniferic acid; polymeric biosurfactants including emulsifiers (emulsan), lipid emulsifiers (liposan), mannoproteins, and polysaccharide-protein complexes.

Preferably, the biosurfactant comprises a rhamnolipid.

Surfactants may be present in the composition at a level of 3-85 wt%, preferably 3-60 wt%, more preferably 3-40 wt%, most preferably 3-35% by weight.

Preferably, the anionic surfactant is present at a level of 0.1-95 wt%, preferably 1-50 wt%, more preferably 1.5-25 wt%, based on the total weight of surfactant present.

Preferably, the surfactant is an anionic surfactant.

Anionic surfactants are defined herein as amphiphilic molecules comprising one or more functional groups that exhibit a net anionic charge in aqueous solution at normal wash pH between 6-11.

Preferred anionic biosurfactants are the lactone acid forms of rhamnolipids and sophorolipids. Biosurfactants that have not been biologically expressed in an anionic form but have been modified to provide/improve anionic properties are included in the present invention.

Preferred synthetic anionic surfactants are alkali metal salts of organosulfur reaction products having in their molecular structure an alkyl group comprising about 6 to 24 carbon atoms and a group selected from the group consisting of sulfonate and sulfate groups .

Although any anionic surfactant described hereinafter may be used, such as alkyl ether sulfates, soaps, fatty acid ester sulfonates, alkylbenzene sulfonates, sulfosuccinates, primary alkyl sulfates, olefin sulfonates, salts, paraffin sulfonates and organic phosphates; preferred anionic surfactants are alkali metal and alkaline earth metal salts of fatty acid carboxylic acids, fatty alcohol sulfates, preferably primary alkyl sulfates, more preferably they are Ethoxylated, such as alkyl ether sulfates; and alkylbenzene sulfonates or mixtures thereof.

Amphoteric and/or zwitterionic surfactants may be present in the compositions according to the invention. For amphoteric surfactants, the pH of the wash liquor is preferably between 6-10. Preferably, the amphoteric or zwitterionic surfactant is present at a level of 0.1-20% by weight, more preferably 0.25-15% by weight, even more preferably 0.5-10% by weight.

Suitable zwitterionic surfactants are illustratively those that may be broadly referred to as derivatives of aliphatic quaternary ammonium, sulfonium and phosphonium compounds, which contain a long chain group having from about 8 to about 18 carbon atoms and At least one water solubilizing group selected from a sulfate group, a sulfonate group, a carboxylate group, a phosphate group or a phosphonate group. The general formula of these compounds is:

R ₁ (R ₂ ) _X Y ⁺ R ₃ Z ^-

Wherein R comprises _an alkyl, alkenyl or hydroxyalkyl group having 8-18 carbon atoms, 0-10 ethylene oxide groups or 0-2 glycerol units; Y is a nitrogen, sulfur or phosphorus atom ; R ₂ is an alkyl or hydroxyalkyl group with 1-3 carbon atoms; when Y is a sulfur atom, X is 1, and when Y is a nitrogen or phosphorus atom, X is 2; R ₃ is a group with 1 - an alkyl or hydroxyalkyl group of 5 carbon atoms, and Z is a group selected from a sulfate group, a sulfonate group, a carboxylate group, a phosphate group or a phosphonate group.

Preferred amphoteric surfactants are amine oxides such as cocodimethylamine oxide. Preferred zwitterionic surfactants are betaines, especially amidobetaines. Preferred betaines are C ₈ -C ₁₈ alkylamidoalkyl betaines, such as cocamido betaines. These may be introduced as co-surfactants, preferably present in an amount of 0-10% by weight, more preferably 1-5% by weight, based on the weight of the total composition.

Preferred amphoteric or zwitterionic surfactants for incorporation into compositions according to the invention are betaine surfactants. Examples of these are mentioned in the enumeration below.

Sulfated betaines such as 3-(lauryldimethylammonium)-1-propane sulfate; and 2-(cocodimethylammonium)-1-ethane sulfate.

Sulfobetaines such as 3-(dodecyldimethylammonium)-2-hydroxy-1-propanesulfonate; 3-(tetradecyldimethylammonium)-1-propanesulfonate ; 3-(C ₁₂ -C ₁₄ Alkyl-amidopropyldimethylammonium)-2-hydroxy-1-propanesulfonate; and 3-(Cocodimethylammonium)-1-propanesulfonic acid Salt.

Carboxybetaines such as (lauryldimethylammonium) acetate (also known as lauryl betaine); (tetradecyldimethylammonium) acetate (also known as myristyl betaine ); (cocodimethylammonium) acetate (also known as coconut betaine); (oleyldimethylammonium) acetate (also known as oleyl betaine); (lauryloxymethylammonium) acetate (cocamidopropyldimethylammonium) acetate; and (cocamidopropyldimethylammonium) acetate (also known as cocamidopropyl betaine or CAPB).

Sulfonium betaines such as: (dodecyldimethylsulfonium) acetate; and 3-(cocodimethyl-sulfonium)-1-propanesulfonate.

Phosphonium betaines such as: 4-(trimethylphosphonium)-1-hexadecanesulfonate; 3-(dodecyldimethylphosphonium)-1-propanesulfonate; and 2-(dodecylphosphonium) Alkyldimethylphosphonium)-1-ethanesulfonate.

The compositions according to the invention preferably comprise carboxybetaines or sultaines or mixtures thereof as amphoteric or zwitterionic surfactants. Especially preferred is lauryl betaine.

Further optional ingredients include additional surfactants such as non-ionic and cationic surfactants, viscosity modifiers, foam boosters, preservatives (such as bactericides), pH buffering agents, polyelectrolytes, anti-shrinkage agents, anti-wrinkle agents, Antioxidants, sunscreens, anticorrosion agents, drape imparting agents, antistatic agents and ironing aids. The composition may further comprise colorants, pearlescent and/or opacifying agents, as well as shading dyes, fluorescent agents.

The composition may comprise enzymes. The composition is preferably free or at least substantially free of proteases and/or amylases.

The composition is preferably free, or at least substantially free, of alkylamides of coconut fatty acids.

experiment

Example

Exemplary laundry detergent compositions to which an alkyl arginine ester compound may be added are described below.

Where Neodol 25-7 is from Shell, =C ₁₂ -C ₁₅ alcohol 7-ethoxylate.

LAS acid=C ₁₀ -C ₁₄ alkylbenzenesulfonic acid;

SLES = C ₁₂ -C ₁₃ alcohol 3-ethoxylated sulfate, Na salt: = sodium lauryl ether sulfate (with an average of 3 ethylene oxide groups);

In these examples, alkyl arginine ester compounds were tested in laundry detergent compositions to determine their ability to treat soils from cotton fabrics in various ways. All values throughout are % by weight.

Endpoint decontamination experiment

Reagent

• Punch out the following stained cotton fabric samples (centered on test material BV) into discs and transfer to 300 μl 96-well plates.

• Fatty soils: Purple stained used frying fat (CS-46), colored tallow (CS-61).

Laundry detergent composition: working concentration stock solution dilution = 1: 428 (that is, the following stock solution is diluted 1: 428 times in the washing liquid)

●Enzyme-free laundry detergent composition

Arginine methyl ester (arginine methyl ester dihydrochloride form, Sigma catalog number: 26340-89-6, EC number 247-622-0)

program

Prewashing of soiled fabrics

Prewash the soiled fabric discs to remove any residual free soil by:

●Add 200 μl distilled water to each well

● Shake the plate for 2 minutes at 250 rpm on a plate shaker

●Remove water

Pretreatment of soiled fabrics with diamines followed by main wash

Add the following test and control mixtures to the wells:

●Test mixture

●Laundry detergent composition 100μl

●Distilled water 80μl

●Arginine Methyl Ester Diluent* 20μl

*Alkyl arginate compound was diluted to a final concentration of 5 mg/ml.

● Control mix (negative control laundry detergent composition only)

●Laundry detergent composition 100μl

●Distilled water 100μl

The stained fabric was incubated in the pretreatment solution for 5 minutes at room temperature without shaking. The pretreatment wash liquid is then removed. After pretreatment, the stained fabrics were washed (250 rpm, 1 hour, room temperature) in the following mixture:

●Laundry detergent composition 100μl

●Distilled water 100μl

After washing, the wash liquid was then removed and the fabric was washed with 200 μl of distilled water for 4 x 5 min at 250 rpm on a plate shaker. The fabrics were then allowed to dry overnight at room temperature before being scanned.

(2b) Main washing of stained fabrics utilizing diamines

Add the following test and control mixtures to the wells:

●Test mixture

●Laundry detergent composition 100μl

●Distilled water 80μl

●Arginine methyl ester 20μl

* Compounds were diluted to final concentrations: 10, 5, 2.5, 1.25, 0.62, 0.31 and 0.15 mg/ml.

● Control mix (negative control for laundry detergent composition only)

●Laundry detergent composition 100μl

●Distilled water 100μl

The soiled fabrics were washed at 250 rpm for 1 hour at room temperature. After washing, the wash liquid was then removed and the fabric was washed with 200 μl of distilled water for 4 x 5 min at 250 rpm on a plate shaker. The fabrics were then allowed to dry overnight at room temperature before being scanned.

After drying, the soiled panels were digitally scanned and their ΔE measured. This value is used to represent cleaning performance and is defined as the color difference between a white cloth and a laundered stained cloth. Mathematically, ΔE is defined as:

ΔE＝[(ΔL) ² +(Δa) ² +(Δb) ² ] ^1/2

where ΔL is the measure of the difference in darkness between the wash cloth and the white cloth; Δa and Δb are the measures of the difference in redness and yellowness, respectively, of the two cloths. From this equation, it is clear that the lower the value of ΔE, the whiter the cloth will be. For this color measurement technique, refer to the International Commission on Illumination (CIE) (Commission International de l'Eclairage); Recommendation on Uniform Color Spaces, color difference equations, psychometric colourterms, No. 2 CIE Publication Supplement No. 15, Colormetry, Bureau Central de la CIE, Paris 1978.

In the table below, the cleaning performance is expressed in terms of the Stain Removal Index (SRI);

SRI = 100-ΔE.

The higher the SRI, the cleaner the cloth, SRI=100 (white).

result

fried fatty dirt results

tallow soil results

in conclusion

The results show that alkyl arginine esters in combination with a laundry detergent composition can improve the cleaning of fatty soiled fabrics when applied both as a pre-treatment prior to the main wash and when included directly in the main wash. In general, cleansing improvements were dose-dependent.

Claims (15)

CLAIMS 1. An ambient active stain removal composition comprising an alkyl arginine ester. 2. The ambient active stain removal composition according to claim 1, wherein said alkyl arginine ester comprises arginine methyl ester or arginine ethyl ester or any combination thereof. 3. A composition according to claim 1 or claim 2, wherein the surfactant comprises an anionic surfactant. 4. A composition according to any one of the preceding claims, wherein the surfactant comprises a rhamnolipid. 5. A composition according to any one of the preceding claims, wherein the stain removal composition is active under ambient conditions. 6. A composition according to any one of the preceding claims, wherein the substrate comprises a fabric. 7. A composition according to any one of the preceding claims, wherein the substrate comprises tableware, crockery and other household hard surfaces. 8. A pretreatment device comprising (i) a reservoir for storing a composition according to any one of claims 1-7 and (i) a dispenser for topical application of said composition to a soil on a substrate, Preferably wherein said substrate comprises cutlery, crockery and other household hard surfaces. 9. A method of removing soil from a soiled substrate comprising the step of applying to said soil a soil removal composition according to any one of claims 1-8, said step being carried out at ambient temperature. 10. A method according to claim 9 including the step of adding water to the stain removal composition to form an aqueous wash liquid, said liquid being at ambient temperature. 11. The method according to any one of claims 9 or 10, comprising topically applying the fabric stain removal composition of any one of claims 1-8 to the stain on the stained fabric, said step being at ambient temperature conduct. 12. The method according to any one of claims 9-11, wherein the step of applying a stain removal composition is a pretreatment step using a pretreatment device according to claim 9. 13. The method according to any one of claims 9-12, wherein the arginine alkyl compound is present in the wash liquor at 0.01-10 mg/ml. 14. The method of any one of claims 9-13, wherein the substrate comprises tableware, crockery and other household hard surfaces. 15. Use of alkyl arginine esters, preferably in combination with surfactants, for the removal of oily/fatty soils.