Cost-effective detergent composition for commercial laundry
A cost-effective laundry detergent blend of nonionic surfactants and chelants addresses the inefficiencies of expensive commercial detergents by providing effective soil removal for commercial laundry facilities.
Patent Information
- Application Number
- PCT/CN2024/071980
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-07-17
AI Technical Summary
Commercial laundry facilities face challenges in cleaning large volumes of heavily soiled textiles efficiently and cost-effectively due to the high cost and complexity of existing detergents.
A cost-effective laundry detergent composition comprising a blend of nonionic surfactants, including C10-C20 linear alcohol ethoxylates and C8-C16 branched alcohol ethoxylates, along with a chelant and a carrier, which provides high detergency without expensive ingredients.
The composition effectively removes a variety of soils from textiles while maintaining high detergency, offering a more economical solution for commercial laundry operations.
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Figure CN2024071980_17072025_PF_FP_ABST
Abstract
Description
COST-EFFECTIVE DETERGENT COMPOSITION FOR COMMERCIAL LAUNDRYTECHNICAL FIELD
[0001] The disclosure relates to cost-effective laundry detergent compositions. The laundry compositions are for commercial laundries, including in particular on-premise laundry and factory textile washing. The laundry detergents have minimal ingredients while maintaining soil removal properties.BACKGROUND
[0002] The background description provided herein gives context for the present disclosure. Work of the presently named inventors, as well as aspects of the description that may not otherwise qualify as prior art at the time of filing, are neither expressly nor impliedly admitted as prior art.
[0003] Commercial laundry service facilities, including, but not limited to, on-premises laundry (such as hotels, gyms, and restaurants) and factory textile washing facilities, are faced with the challenge of cleaning large volumes of textiles, of varying textile materials, often heavily soiled, under quick time constraints. Many laundry detergents now utilize expensive materials due to their detergency properties; other laundry detergents include a lot of ingredients, which also increases the cost. There is a need for cost-effective commercial laundry detergents that, while having less costly and less numerous ingredients, are able to provide quality detergency.
[0004] It is therefore an object of this disclosure to provide commercial laundry detergents that satisfy this need.
[0005] It is a further object of this disclosure to provide commercial laundry detergents with high efficacy detergency which do not include expensive components.
[0006] It is a further object of the disclosure to provide commercial laundry detergents with high efficacy detergency suitable for commercial laundry cleaning and a variety of textiles.
[0007] Other objects, embodiments and advantages of this disclosure will be apparent to one skilled in the art in view of the following disclosure, the drawings, and the appended claims.SUMMARY
[0008] An advantage of the compositions and methods disclosed herein is that they are cost-effective in not requiring expensive components or a long list of ingredients, while providing very good detergency properties. It is a further object, feature, and / or advantage of the laundry detergent compositions disclosed herein, that they are suitable for use in commercial laundering conditions and with a variety of textiles and soils.
[0009] A preferred embodiment is a laundry detergent composition comprising from about 10 wt. %to about 35 wt. %of a surfactant blend having at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate, a C8-C16 branched alcohol ethoxylate, and mixtures thereof; from about 2 wt. %to about 15 wt. %of a chelant; and from 50 wt. %to about 90 wt. %of a carrier.
[0010] A preferred embodiment is a laundry detergent composition comprising from about 10 wt. %to about 35 wt. %of a surfactant blend having at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate having 2 to 5 moles of ethoxylation, a C10-C20 linear alcohol ethoxylate having 6 to 10 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having 2 to 6 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having 7 to 11 moles of ethoxylation, and mixtures thereof; from about 2 wt. %to about 15 wt. %of a chelant; and from 50 wt. %to about 90 wt. %of a carrier.
[0011] A preferred embodiment a method of cleaning laundry comprising (a) providing a soiled laundry item to a laundering machine; (b) providing the laundry detergent composition to the laundering machine, wherein the laundry detergent composition comprises from about 10 wt. %to about 35 wt. %of a surfactant blend having at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate, a C8-C16 branched alcohol ethoxylate, and mixtures thereof; from about 2 wt. %to about 15 wt. %of a chelant; and from 50 wt. %to about 90 wt. %of a carrier (c) washing the soiled laundry item with the laundry detergent composition; (d) performing a rinse cycle in the laundering machine; and (e) draining water from the laundering machine; wherein the soiled laundry is cleaned such that soils are removed.
[0012] A preferred embodiment a method of cleaning laundry comprising (a) providing a soiled laundry item to a laundering machine; (b) providing the laundry detergent composition to the laundering machine, wherein the laundry detergent composition comprises from about 10 wt. %to about 35 wt. %of a surfactant blend having at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate having 2 to 5 moles of ethoxylation, a C10-C20 linear alcohol ethoxylate having 6 to 10 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having 2 to 6 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having 7 to 11 moles of ethoxylation, and mixtures thereof; from about 2 wt. %to about 15 wt. %of a chelant; and from 50 wt. %to about 90 wt. %of a carrier (c) washing the soiled laundry item with the laundry detergent composition; (d) performing a rinse cycle in the laundering machine; and (e) draining water from the laundering machine; wherein the soiled laundry is cleaned such that soils are removed.
[0013] While multiple embodiments are disclosed, still other embodiments will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.
[0014] BRIEF DESCRIPTION OF THE FIGURES
[0015] Figure 1 shows the results of testing Formulas 1, 2, 3 as denoted on the x axis, with multiple soil stains as shown in the legend. The y axis shows the percentage of soil removal for each Formula and soil stain tested.
[0016] Figure 2 shows the results of testing Formulas 1, 2, 3 as denoted on the x axis, with multiple soil stains as shown in the legend. The y axis shows the percentage of soil removal for each Formula and soil stain tested.
[0017] Figure 3 shows the results of testing Formulas A, B, C, D, E, F, and G as denoted on the x axis, with multiple soil stains as shown in the legend. The y axis shows the percentage of soil removal for each Formula and soil stain tested.
[0018] Figure 4 shows the results of testing Formulas H, I, J, K, L, and M as denoted on the x axis, with multiple soil stains as shown in the legend. The y axis shows the percentage of soil removal for each Formula and soil stain tested.
[0019] Figure 5 shows the results of testing Formulas N, O, P, Q and R as denoted on the x axis, with multiple soil stains as shown in the legend. The y axis shows the percentage of soil removal for each Formula and soil stain tested.
[0020] Various embodiments of the present disclosure will be described in detail with reference to the figures. Reference to various embodiments does not limit the scope of the disclosure. Figures represented herein are not limitations to the various embodiments according to the disclosure and are presented for exemplary illustration of the invention. An artisan of ordinary skill in the art need not view, within isolated figure (s) , the near infinite number of distinct permutations of features described in the following detailed description to facilitate an understanding of the present invention.DETAILED DESCRIPTION
[0021] The present disclosure is not to be limited to that described herein, which can vary and are understood by skilled artisans. No features shown or described are essential to permit basic operation of the present disclosure unless otherwise indicated. It has been found and disclosed herein that cost effective laundry detergent compositions high detergent efficacy can be formulated utilizing a blend of nonionic surfactants and a chelant along with a carrier. These formulations do not require expensive cleaning ingredients, nor a lot of ingredients. The cleaning efficacy is found in the use of a particular blend of three or more nonionic surfactants. This and other advantages and benefits of the disclosure are provided herein.
[0022] It is further to be understood that all terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting in any manner or scope. For example, as used in this specification and the appended claims, the singular forms “a, ” “an” and “the” can include plural referents unless the content clearly indicates otherwise. Further, all units, prefixes, and symbols may be denoted in its SI accepted form.
[0023] Numeric ranges recited within the specification are inclusive of the numbers defining the range and include each integer within the defined range. Throughout this disclosure, various aspects of this disclosure are presented in a range format. It should be understood that the description in range format is merely for convenience and brevity and should not be construed as an inflexible limitation on the scope of the disclosure. Accordingly, the description of a range should be considered to have specifically disclosed all the possible sub-ranges, fractions, and individual numerical values within that range. For example, description of a range such as from 1 to 6 should be considered to have specifically disclosed sub-ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6 etc., as well as individual numbers within that range, for example, 1, 2, 3, 4, 5, and 6, and decimals and fractions, for example, 1.2, 3.8, 11 / 2, and 43 / 4. This applies regardless of the breadth of the range.
[0024] All publications, including all patents, patent applications and other patent and non-patent publications cited or mentioned herein are incorporated herein by reference for at least the purposes that they are cited; including for example, for the disclosure or descriptions of methods of materials which may be used. Nothing herein is to be construed as an admission that a publication or other reference (including any reference cited in the Background section) is prior art to the invention or that the invention is not entitled to antedate such disclosure, for example, by virtue of prior invention.
[0025] As used herein, the term “and / or” , e.g., “X and / or Y” shall be understood to mean either “X and Y” or “X or Y” and shall be taken to provide explicit support for both meanings or for either meaning, e.g. A and / or B includes the options i) A, ii) B or iii) A and B.
[0026] It is to be appreciated that certain features that are, for clarity, described herein in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features that are, for brevity, described in the context of a single embodiment, may also be provided separately or in any sub-combination.
[0027] The methods and compositions of the present disclosure may comprise, consist essentially of, or consist of the components and ingredients of the present disclosure as well as other ingredients described herein. As used herein, “consisting essentially of” means that the methods, systems, apparatuses and compositions may include additional steps, components or ingredients, but only if the additional steps, components or ingredients do not materially alter the basic and novel characteristics of the claimed methods, systems, apparatuses, and compositions.
[0028] Unless defined otherwise, all technical and scientific terms used above have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present disclosure pertain.
[0029] The terms “invention” or “present invention” are not intended to refer to any single embodiment of the particular invention but encompass all possible embodiments as described in the specification and the claims.
[0030] The term “about, ” as used herein, refers to variation in the numerical quantity that can occur, for example, through typical measuring techniques and equipment, with respect to any quantifiable variable, including, but not limited to, concentration, mass, volume, time, molecular weight, temperature, pH, molar ratios, and the like. Further, given solid and liquid handling procedures used in the real world, there is certain inadvertent error and variation that is likely through differences in the manufacture, source, or purity of the ingredients used to make the compositions or carry out the methods and the like. The term “about” also encompasses these variations. Whether or not modified by the term “about, ” the claims include equivalents to the quantities.
[0031] The term “actives” or “percent actives” or “percent by weight actives” or “actives concentration” are used interchangeably herein and refers to the concentration of those ingredients involved in cleaning expressed as a percentage minus inert ingredients such as water or salts. It is also sometimes indicated by a percentage in parentheses, for example, “chemical (10%) . ”
[0032] As used herein, the term “alkyl” or “alkyl groups” refers to saturated hydrocarbons having one or more carbon atoms, including straight-chain alkyl groups (e.g., methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, etc. ) , cyclic alkyl groups (or “cycloalkyl” or “alicyclic” or “carbocyclic” groups) (e.g., cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, etc. ) , branched-chain alkyl groups (e.g., isopropyl, tert-butyl, sec-butyl, isobutyl, etc. ) , and alkyl-substituted alkyl groups (e.g., alkyl-substituted cycloalkyl groups and cycloalkyl-substituted alkyl groups) .
[0033] Unless otherwise specified, the term “alkyl” includes both “unsubstituted alkyls” and “substituted alkyls. ” As used herein, the term “substituted alkyls” refers to alkyl groups having substituents replacing one or more hydrogens on one or more carbons of the hydrocarbon backbone. Such substituents may include, for example, alkenyl, alkynyl, halogeno, hydroxyl, alkylcarbonyloxy, arylcarbonyloxy, alkoxycarbonyloxy, aryloxy, aryloxycarbonyloxy, carboxylate, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, alkylthiocarbonyl, alkoxyl, phosphate, phosphonato, phosphinato, cyano, amino (including alkyl amino, dialkylamino, arylamino, diarylamino, and alkylarylamino) , acylamino (including alkylcarbonylamino, arylcarbonylamino, carbamoyl and ureido) , imino, sulfhydryl, alkylthio, arylthio, thiocarboxylate, sulfates, alkylsulfinyl, sulfonates, sulfamoyl, sulfonamido, nitro, trifluoromethyl, cyano, azido, heterocyclic, alkylaryl, or aromatic (including heteroaromatic) groups.
[0034] In some embodiments, substituted alkyls can include a heterocyclic group. As used herein, the term “heterocyclic group” includes closed ring structures analogous to carbocyclic groups in which one or more of the carbon atoms in the ring is an element other than carbon, for example, nitrogen, sulfur or oxygen. Heterocyclic groups may be saturated or unsaturated. Exemplary heterocyclic groups include, but are not limited to, aziridine, ethylene oxide (epoxides, oxiranes) , thiirane (episulfides) , dioxirane, azetidine, oxetane, thietane, dioxetane, dithietane, dithiete, azolidine, pyrrolidine, pyrroline, oxolane, dihydrofuran, and furan.
[0035] As used herein, the term “between” is inclusive of any endpoints noted relative to a described range.
[0036] As used herein, the term “cleaning” refers to a method used to facilitate or aid in soil removal, bleaching, microbial population reduction, and any combination thereof. As used herein, the term “microorganism” refers to any noncellular or unicellular (including colonial) organism. Microorganisms include all prokaryotes. Microorganisms include bacteria (including cyanobacteria) , spores, lichens, fungi, protozoa, virinos, viroids, viruses, phages, and some algae. As used herein, the term “microbe” is synonymous with microorganism.
[0037] Terms characterizing sequential order, a position, and / or an orientation are not limiting and are only referenced according to the views presented.
[0038] As used herein, the term “exemplary” refers to an example, an instance, or an illustration, and does not indicate a most preferred embodiment unless otherwise stated.
[0039] The phrase “free of” or similar phrases if used herein means that the composition comprises 0%of the stated component and refers to a composition where the component has not been intentionally added. However, it will be appreciated that such components may incidentally form thereafter, under some circumstances, or such component may be incidentally present, e.g., as an incidental contaminant.
[0040] The term “generally” encompasses both “about” and “substantially. ”
[0041] The term "laundry" refers to items or articles that are cleaned in a laundry washing machine. In general, laundry refers to any item or article made from or including textile materials, woven fabrics, non-woven fabrics, and knitted fabrics. The textile materials can include natural or synthetic fibers such as silk fibers, linen fibers, cotton fibers, polyester fibers, polyamide fibers such as nylon, acrylic fibers, acetate fibers, and blends thereof including cotton and polyester blends. The fibers can be treated or untreated. Exemplary treated fibers include those treated for flame retardancy. It should be understood that the term "linen" is often used to describe certain types of laundry items including bed sheets, pillowcases, towels, table linen, table cloth, bar mops and uniforms. The invention additionally provides a composition and method for treating non-laundry articles and surfaces including hard surfaces such as dishes, glasses, and other ware.
[0042] As used herein the term “polymer” refers to a molecular complex comprised of a more than ten monomeric units and generally includes, but is not limited to, homopolymers, copolymers, such as for example, block, graft, random and alternating copolymers, terpolymers, and higher “x” mers, further including their analogs, derivatives, combinations, and blends thereof. Furthermore, unless otherwise specifically limited, the term “polymer” shall include all possible isomeric configurations of the molecule, including, but are not limited to isotactic, syndiotactic and random symmetries, and combinations thereof. Furthermore, unless otherwise specifically limited, the term “polymer” shall include all possible geometrical configurations of the molecule.
[0043] As used herein, the term “soft surface” refers to surfaces not classified as hard surfaces, but which are solid surfaces. Soft surfaces, include, but are not limited to, textiles, fabrics, woven surfaces, and non-woven surfaces. Soft surfaces, include, but are not limited to, carpet, curtains, fabrics, hospital partitions, linens, and upholstery.
[0044] As used herein, the term “soil” or “stain” refers to any soil, including, but not limited to, non-polar oily and / or hydrophobic substances which may or may not contain particulate matter such as industrial soils, mineral clays, sand, natural mineral matter, carbon black, graphite, kaolin, environmental dust, and / or food based soils such as blood, proteinaceous soils, starchy soils, fatty soils, cellulosic soils, etc.
[0045] The “scope” of the present disclosure is defined by the appended claims, along with the full scope of equivalents to which such claims are entitled. The scope of the disclosure is further qualified as including any possible modification to any of the aspects and / or embodiments disclosed herein which would result in other embodiments, combinations, subcombinations, or the like that would be obvious to those skilled in the art.
[0046] The term “substantially” refers to a great or significant extent. “Substantially” can thus refer to a plurality, majority, and / or a supermajority of said quantifiable variable, given proper context.
[0047] As used herein, the term “substantially free” refers to compositions completely lacking the component or having such a small amount of the component that the component does not affect the performance of the composition. The component may be present as an impurity or as a contaminant and shall be less than 0.5 wt-%. In another embodiment, the amount of the component is less than 0.1 wt-%and in yet another embodiment, the amount of component is less than 0.01 wt-%.
[0048] The term “surfactant” or “surface active agent” refers to an organic chemical that when added to a liquid changes the properties of that liquid at a surface.
[0049] As used herein the terms “use solution, ” “ready to use, ” or variations thereof refer to a composition that is diluted, for example, with water, to form a use composition having the desired components of active ingredients for cleaning. For reasons of economics, a concentrate can be marketed, and an end-user can dilute the concentrate with water or an aqueous diluent to a use solution.
[0050] The term “weight percent, ” “wt-%, ” “percent by weight, ” “%by weight, ” and variations thereof, as used herein, refer to the concentration of a substance as the weight of that substance divided by the total weight of the composition and multiplied by 100. It is understood that, as used here, “percent, ” “%, ” and the like are intended to be synonymous with “weight percent, ” “wt-%, ” etc.
[0051] COMMERCIAL LAUNDRY DETERGENT COMPOSITIONS
[0052] The commercial laundry detergent compositions are liquids that a blend of nonionic surfactants, a chelant, and water. The blend of nonionic surfactants includes at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate, a C8-C16 branched alcohol ethoxylate, and mixtures thereof. Preferred embodiments of the commercial laundry detergent compositions are provided in Tables 1-2 in weight percentage.
[0053] TABLE 1
[0054] TABLE 2
[0055] The embodiments provided in tables 1 and 2 are concentrated formulations. They may be used in concentrated form and diluted during use or they can be diluted prior to use to form ready to use formulations. In general, a concentrate refers to a composition that is intended to be diluted with water to provide a use solution that contacts an object to provide the desired cleaning, rinsing, or the like. The laundry detergent compositions that contacts the articles to be washed can be referred to as a concentrate or a use composition (or use solution) dependent upon the formulation employed in methods. It should be understood that the concentration of the nonionic surfactants, chelants, and any optional ingredients will vary depending on whether the composition is provided as a concentrate or as a use solution.
[0056] A use solution may be prepared from the concentrate by diluting the concentrate with water or other diluents at a dilution ratio that provides a use solution having desired detersive properties. The typical dilution factor is between approximately 1 and approximately 10,000 but will depend on factors including water hardness, the amount of soil to be removed and the like. In an embodiment, the concentrate is diluted at a ratio of between about 1: 10 and about 1: 10, 000 concentrate to water, inclusive of all integers with this range, e.g., 1: 50, 1: 100, 1:1, 000, and the like. Particularly, the concentrate is diluted at a ratio of between about 1: 100 and about 1: 5, 000 concentrate to diluent. In an embodiment, the compositions are diluted to a concentration of between about 0.1 g / L to about10 g / L, preferably between about 0.5 g / L to about 8 g / L.
[0057] Blend of Nonionic Surfactants
[0058] The commercial laundry detergent compositions comprise at least three nonionic surfactants. The nonionic surfactants alcohol ethoxylate surfactants include at least three of a C10-C20 linear alcohol ethoxylate and a C8-C16 branched alcohol ethoxylate.
[0059] Alcohol ethoxylates have the following formula:
[0060] wherein R1 is a branched, saturated or unsaturated, substituted or unsubstituted alkyl group; and wherein n represents the degree of ethoxylation and is an integer between 1 and 20, preferably between 2 and 16, and more preferably between 2 and 12. According to this disclosure, the alkyl group is from C6 to C22, more preferably C8 to C20.
[0061] Suitable 5 moles EO to 7 moles EO alcohol polyethylene glycol ethers include, but are not limited to, those sold under the names of TO5, TO7, XP5, XL50, and XL70.
[0062] Particularly preferred alcohol ethoxylates include, but are not limited to, isotridecanol ethoxylate (7 EO) and isotridecyl alcohol ethoxylate (9 EO) , such as TO7, TO 8, TO9.
[0063] In a preferred embodiment the nonionic alcohol ethxylate surfactants include at least one of an isotridecanol ethoxylate (7 EO) or isotridecyl alcohol ethoxylate (9 EO) and a branched C10–C15 alcohol ethoxylate having between 5 moles EO and 10 moles EO.
[0064] In an embodiment, the laundry compositions can comprise two C10-C20 linear alcohol ethoxylates each having different moles of ethoxylation, one having from about 2 to about 5 moles of ethoxylation and the second having from about 6 to about 10 moles of ethoxylation. In a preferred embodiment, the C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation is in an amount of from about 10 wt. %to about 20 wt. %.
[0065] In an embodiment, the laundry compositions can comprise two C8-C16 branched alcohol ethoxylates each having different moles of ethoxylation, one having from about 2 to about 6 moles of ethoxylation and the second having from about 7 to about 11 moles of ethoxylation. In a preferred embodiment, the C8-C16 branched alcohol ethoxylate having from about 3 to about 6 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %.
[0066] In an embodiment, the laundry compositions comprise three nonionic surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation, a C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having from about 2 to about 6 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation, and mixtures thereof.
[0067] In an embodiment, the laundry compositions comprise four nonionic surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation, a C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having from about 2 to about 6 moles of ethoxylation, a C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation, and mixtures thereof.
[0068] In a most preferred embodiment, the laundry compositions comprise a C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation in an amount of from about 1 wt. %to about 5 wt. %; a C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation in an amount of from about 10 wt. %to about 20 wt. %; a C8-C16 branched alcohol ethoxylate having from about 2 to about 6 moles of ethoxylation in an amount of from about 1 wt. %to about 5 wt. %; and a C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation in an amount of from about 1 wt. %to about 5 wt. %.
[0069] Chelant
[0070] The commercial laundry detergent compositions comprise a chelant. As used herein “chelant” or “chelating agent” refers to a compound capable of coordinating (i.e., binding) metal ions commonly found in hard or natural water to prevent the metal ions from interfering with the action of the other detersive ingredients of the commercial laundry detergent composition.
[0071] Suitable chelants can comprise an organic water conditioning agent including polymeric and small molecule water conditioning agents. Organic small molecule water conditioning agents are typically organocarboxylate compounds or organophosphate water conditioning agents. Polymeric inhibitors commonly comprise polyanionic compositions such as polyacrylic acid compounds (PAA) .
[0072] Preferred small molecule organic water conditioning agents include, but are not limited to: gluconic acid, sodium glucoheptonate, N-hydroxyethylenediaminetriacetic acid (HEDTA) , ethylenediaminetetraacetic acid (EDTA) , nitrilotriacetic acid (NTA) , diethylenetriaminepentaacetic acid (DTPA) , ethylenediaminetetraproprionic acid, triethylenetetraaminehexaacetic acid (TTHA) , and the respective alkali metal, ammonium and substituted ammonium salts thereof, ethylenediaminetetraacetic acid tetrasodium salt (EDTA) , nitrilotriacetic acid trisodium salt (NTA) , ethanoldiglycine disodium salt (EDG) , diethanolglycine sodium-salt (DEG) , and 1, 3-propylenediaminetetraacetic acid (PDTA) , dicarboxymethyl glutamic acid tetrasodium salt (GLDA) , methylglycine-N-N-diacetic acid trisodium salt (MGDA) , 1-hydroxyethylidene-1, 1-diphosphponic acid (HEDP) , iminodisuccinate sodium salt (IDS) , or a combination thereof.
[0073] Preferred inorganic water conditioning agents include, but are not limited to, sodium tripolyphosphate and other higher linear and cyclic polyphosphates species. Suitable condensed phosphates include sodium and potassium orthophosphate, sodium and potassium pyrophosphate, sodium tripolyphosphate, and sodium hexametaphosphate. A condensed phosphate may also assist, to a limited extent, in the solidification of the solid detergent composition by fixing the free water present in the composition as water of hydration. Examples of phosphonates included, but are not limited to: 1-hydroxyethane-1, 1-diphosphonic acid, CH3C (OH) [PO (OH) 2] 2; aminotri (methylenephosphonic acid) , N [CH2PO (OH) 2] 3; aminotri (methylenephosphonate) , sodium salt (ATMP) , N [CH2PO (ONa) 2] 3; 2-hydroxyethyliminobis (methylenephosphonic acid) , HOCH2CH2N [CH2PO (OH) 2] 2; diethylenetriaminepenta (methylenephosphonic acid) , (HO) 2POCH2N [CH2CH2N [CH2PO (OH) 2] 2] 2; diethylenetriaminepenta (methylenephosphonate) , sodium salt (DTPMP) , C9H28-xN3NaxO15P5 (x=7) ; hexamethylenediamine (tetramethylenephosphonate) , potassium salt, C10H28-xN2KxO12P4 (x=6) ; bis (hexamethylene) triamine (pentamethylenephosphonic acid) , (HO2) POCH2N [ (CH2) 6N [CH2PO (OH) 2] 2] 2; and phosphorus acid, H3PO3. A preferred phosphonate combination is ATMP and DTPMP.
[0074] Preferred chelants include gluconic acid or its salt, aminocarboxylic acids or there salts, or mixtures thereof. More preferred chelants comprise gluconic acid, EDTA, MGDA, GLDA, HEDTA, and combinations thereof.
[0075] In an embodiment, the compositions are substantially free of phosphates and / or phosphonates.
[0076] Carrier
[0077] The commercial laundry detergent compositions are liquid and comprise a carrier. Preferably the carrier is water; although in some embodiments, the carrier can be a mixture of water and a water miscible solvent. Preferably, the carrier is in an amount from about 50 wt. %to about 90 wt. %; from about 55 wt. %to about 85 wt. %; from about 60 wt. %to about 80 wt. %. In addition, without being limited according to the disclosure, all ranges recited are inclusive of the numbers defining the range and include each integer within the defined range.
[0078] Water
[0079] The commercial laundry detergent compositions comprise water as the carrier; while it can be combined with a water miscible solvent, more preferably the carrier consists essentially of, or consists of water. The water can be from any suitable source and is preferably low hardness. Preferred water includes water having a hardness of less than 15 grain, less than 10 grain, less than 9 grain, less than 8 grain, less than 7 grain, less than 6 grain, less than 5 grain. Preferred water can be tap water, distilled water, reverse osmosis water, or another water source.
[0080] Solvents
[0081] The commercial laundry detergent compositions can optionally comprise a solvent, preferably an organic solvent, in combination with water. If a solvent is included, it is preferably a water miscible solvent. Preferred solvents, include but are not limited to, an alcohol, a glycol, an ether, a ketone, or a combination thereof. In a preferred embodiment, the organic solvent comprises a lower alkyl alcohol, a propylene glycol, or a combination thereof.
[0082] A lower alkyl alcohol solvent includes compounds of the general formula ROH where R is linear or branched, substituted or unsubstituted C1-8 alkyl group and OH is the hydroxyl group; a ketone solvent includes organic compounds with a carbonyl group attached to two carbon atoms, and a glycol solvent refers to an organic compound containing two hydroxyl groups; an ether solvent includes organic compounds containing an ether group, namely an oxygen connected to two alkyl or aryl groups according to the general formula R-O-R’ .
[0083] Suitable organic solvents include but are not limited 1-methoxy-2-propanol, 2-methoxy ethanol, acetic acid, acetone, acetonitrile, amylalcohol, benzene, 1-butanol, 2-butanol, or other butanols, 2-butanone, t-butyl alcohol, carbon tetrachloride, chlorobenzene, chloroform, cyclohexane, cyclopentane, 1, 2-dichloroethane, dichloromethane, diethylene glycol, diethyl ether, diethylene glycol dimethyl ether, 1, 2-dimethoxy-ethane, dimethyl acetamide, dimethyl formamide, dimethyl sulfoxide, 1, 4-dioxane, ethanol / ethyl alcohol, ethyl acetate, ethyl methyl ketone, ethylene glycol, glycerin, heptane, hexamethylphosphoramide, hexamethylphosphorous triamine, hexane, isopropylcarbinol, isopropyl alcohol, methanol / methyl alcohol, methyl t-butyl ether, methylene chloride, N, N-dimethyl formamide, N-methyl-2-pyrrolidone, n-butyl acetate, n-propyl alcohol, nitromethane, pentane, petroleum ether, 1-propanol, 2-propanol, propyl alcohol, propylene glycol, pyridine, sec-butyl alcohol, tetrahydrofuran, toluene, triethyl amine, trimethyl carbinol, water, o-dichlorobenzene, o-xylene, m-xylene, p-xylene, virahol, or a combination thereof.
[0084] Preferably, the organic solvent is a mixture of a glycol and a lower alkyl alcohol.
[0085] Particularly preferred organic solvents include, but are not limited to diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, 2-butoxyethanol, ethylene glycol phenyl ether, propylene glycol, including propylene glycol phenyl ether, hexylene glycol, or a combination thereof.
[0086] Optional Additional Functional Ingredients
[0087] The components of the commercial laundry detergent compositions can further be combined with various optional additional functional components suitable for uses disclosed herein. In some embodiments, the commercial laundry detergent compositions including the nonionic surfactant blend and chelant, the carrier makes up a large amount, or even substantially all of the total weight of the detergent compositions. Thus, in some embodiments few or no additional functional ingredients are included therein.
[0088] In other embodiments, optional additional functional ingredients may be included in the compositions. The functional ingredients provide desired properties and functionalities to the compositions. For the purpose of this application, the term “functional ingredient” includes a material that when dispersed or dissolved in a use and / or concentrate solution, such as an aqueous solution, provides a beneficial property in a particular use. Some particular examples of functional materials are discussed in more detail below, although the particular materials discussed are given by way of example only, and that a broad variety of other functional ingredients may be used. For example, many of the functional materials discussed below relate to materials used in laundering.
[0089] In some embodiments, the detergent compositions may include additional softening agents, optical brighteners, defoaming agents, anti-redeposition agents, optical brighteners (including, but not limited to bleaching agents and whitening agents) , solubility modifiers, dispersants, metal protecting agents, stabilizing agents, corrosion inhibitors, enzymes, aesthetic enhancing agents including fragrances and / or dyes, additional rheology and / or solubility modifiers or thickeners, hydrotropes or couplers, buffers, solvents, additional cleaning agents (including additional surfactants) , and the like.
[0090] In embodiments additional the compositions may optionally include one or more additional surfactants, including nonionic, semi-polar nonionic, cationic, anionic, zwitterionic, or amphoteric surfactants. In an embodiment, the compositions are free of additional surfactants, such as additional nonionic, semi-polar nonionic, cationic, anionic, zwitterionic, or amphoteric surfactants. Additional surfactants are described in WO2023 / 178580 which is herein incorporated by reference in its entirety.
[0091] According to embodiments of the disclosure, the various optional additional functional ingredients may be provided in a composition in the amount from up to about 15 wt. %, up to about 14 wt. %, up to about 13 wt. %, up to about 12 wt. %, up to about 11 wt. %, or up to about 10 wt. %. If included, the minimal amount of an optional functional ingredient is 0.001 wt. %, preferably 0.01 wt. %, 0.1 wt. %, 0.2 wt. %, 0.3 wt. %, 0.4 wt. %, or 0.5 wt. %.
[0092] The laundry compositions can optionally include an optical brightener. Preferred optical brightening agents, include, but are not limited to, bleaching agent can be used for lightening or whitening a substrate, and can include bleaching compounds capable of liberating an active halogen species, such as Cl2, Br2, -OCl-and / or -OBr-, or the like, under conditions typically encountered during the cleansing process. Suitable bleaching agents for use can include, for example, chlorine-containing compounds such as a chlorine, a hypochlorite, chloramines, of the like. Some examples of halogen-releasing compounds include the alkali metal dichloroisocyanurates, chlorinated trisodium phosphate, the alkali metal hypochlorites, monochloramine and dichloroamine, and the like. Encapsulated chlorine sources may also be used to enhance the stability of the chlorine source in the composition (see, for example, U. S. Pat. Nos. 4, 618, 914 and 4, 830, 773, the disclosures of which are incorporated by reference herein) . A bleaching agent may also include an agent containing or acting as a source of active oxygen. The active oxygen compound acts to provide a source of active oxygen, for example, may release active oxygen in aqueous solutions. An active oxygen compound can be inorganic or organic, or can be a mixture thereof. Some examples of active oxygen compound include peroxygen compounds, or peroxygen compound adducts. Some examples of active oxygen compounds or sources include hydrogen peroxide, perborates, sodium carbonate peroxyhydrate, phosphate peroxyhydrates, potassium permonosulfate, and sodium perborate mono and tetrahydrate, with and without activators such as tetraacetylethylene diamine, and the like. A laundry composition may include a minor but effective amount of a bleaching agent, for example, in some embodiments, in the range of up to about 10 wt. %, and in some embodiments, in the range of about 0.1 to about 6 wt. %.
[0093] METHODS OF USE
[0094] The methods described herein are for commercial laundry cleaning. It should be understood though that other commercial laundering methods, steps and machines can be utilized with the laundry detergent compositions disclosed herein.
[0095] The compositions and methods are particularly suitable for cleaning soils that accumulate on any type of textiles, namely any item or article made from or including natural fabrics, synthetic fabrics, woven fabrics, non-woven fabrics, and knitted fabrics. The textile materials can include natural or synthetic fibers such as silk fibers, linen fibers, cotton fibers, hemp fibers, angora fibers, bamboo fibers, polyester fibers, polyamide fibers such as nylon, acrylic fibers, acetate fibers, wool, rayon, cashmere, satin, spandex, and blends thereof, including cotton and polyester blends. The fibers can be treated or untreated. Example treated fibers include those treated for flame retardancy. It should be understood that the term “linen” describes a type of material derived from flax plants that is often used in certain types of laundry items including bed sheets, pillowcases, towels, table linen, tablecloth, bar mops, and uniforms.
[0096] The methods of laundering textiles and disinfecting a laundry machine include contacting the compositions described herein with water to generate a use solution to contact textiles in the laundry machine as well as contact the interior surfaces of the laundry machine to disinfect the surfaces. Various types of laundry machines are suitable for use, including institutional and consumer laundry machines, as well as self-service laundry machines that are often available in limited service hotels and other locations for consumer use.
[0097] In embodiments, the compositions described can be provided as concentrate compositions or use solutions. In embodiments, a concentrate composition is employed and first contacts a water source to generate a use solution of the composition.
[0098] Any means of contacting can be used to place the textile surface in contact with the compositions, including, for example, soaking, spraying, dipping, wiping, or the like. Included within the scope of contacting described herein, the textile can also be soaked, including a pretreatment, with the compositions. As a result of the contacting step the textile is washed, and the soils removed.
[0099] In certain embodiments, a concentrate can be sprayed onto a textile surface or provided in water as part of a pre-treatment. The contacting time may vary about 10 seconds to six hours, for example, 1 minute to four hours, 10 minutes to two hours, 15 minutes to an hour, inclusive of all integers within this range. In another aspect, the pre-treatment may last as long as several hours (e.g., overnight soak) .
[0100] As described the method of cleaning may comprise a first step of diluting or creating a use solution (such as from a concentrate liquid composition) can also be included in the methods. An exemplary dilution step includes contacting the liquid concentrate composition with water or another suitable solvent.
[0101] More particularly, in a typical cleaning method, the washing process comprises a pre-wash or pre-soak where the textiles are wetted, and a pre-soak composition is added. The wash phase follows the pre-soak phase; the compositions described herein are added to the wash tank to facilitate soil removal. In some cases, a bleach phase follows the wash phase in order to remove oxidizable stains and whiten the textiles. Next, the rinsing phase removes all suspended soils. In some cases, a laundry sour is added in a souring or finishing phase to neutralize any residual alkalinity from the composition or complete and post-treatment of the textiles needed. In many cases, a fabric softener or other finishing chemical like a starch is also added in the finishing step. Finally, the extraction phase removes as much water from the wash tank and textiles as possible. In some cases, a wash cycle may have two rinse and extraction phases, i.e., a rinse cycle, an intermediate-extract cycle, a final rinse cycle, and a final extraction cycle. After the wash cycle is complete, the resulting wastewater is typically removed and discarded. Although the compositions are typically contacted with the textiles in a pre-treatment or wash phase, the compositions can be contacted with the textiles during any one or more parts of the wash cycle.
[0102] The compositions disclosed herein may be contacted with the textiles during any phase of the wash cycle. Preferably, the compositions are diluted with water and contacted with the textiles during the pre-soak / pre-wash phase or the wash phase, still more preferably during the wash phase. In some embodiments, the compositions are not added during the bleaching phase or the softening or souring phase.
[0103] When the compositions are diluted, they are diluted to a concentration of between about 0.1 ml / L to about 5 ml / L, preferably between about 1 ml / L to about 2 ml / L,
[0104] In an aspect, the compositions will contact the textile to be cleaned for a sufficient amount of time to remove the soils, including from a few seconds to a few hours, including all ranges therebetween. In an embodiment, the composition contacts the textiles for at least about 15 seconds, at least about 30 seconds, at least about 45 seconds, or at least about 60 seconds. In an embodiment, the composition contacts the textiles for at least about 1 minute, at least about 2 minutes, at least about 3 minutes, at least about 4 minutes, or at least about 5 minutes.
[0105] A preferred laundering method comprises the following steps: (a) providing a soiled laundry item to a laundering machine; (b) providing a laundry detergent composition to the laundering machine; (c) washing the soiled laundry item with the laundry detergent composition; (d) performing a rinse cycle in the laundering machine; and (e) draining water from the laundering machine, wherein the soiled laundry is cleaned such that soils are removed. Various additional steps can optionally incorporated into the method, including, but not limited to, a pre-rinse, a soak, a softening step, a sour step, a bleaching / whitening step, or a combination thereof.
[0106] The laundry detergent compositions disclosed herein are suitable for use with a variety of soils. As such, the soiled laundry can be soiled with food soil, non-food oily soil, cosmetic soil, blood, grass stains, dirt, or a mixture thereof. The soils can also be stains and the stains can be removed by the laundering method. The method steps are performed in a commercial laundry machine.
[0107] PREFERRED EMBODIMENTS
[0108] The present disclosure is further defined by the following numbered embodiments:
[0109] 1. A laundry detergent composition comprising: from about 10 wt. %to about 35 wt. %of a surfactant blend having at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate, a C8-C16 branched alcohol ethoxylate, and mixtures thereof; from about 2 wt. %to about 15 wt. %of a chelant; and from 50 wt. %to about 90 wt. %of a carrier.
[0110] 2. The composition of embodiment 1, wherein the C10-C20 linear alcohol ethoxylate has from about 2 to about 10 moles of ethoxylation.
[0111] 3. The composition of embodiment 1 or embodiment 2, wherein the surfactant blend has two C10-C20 linear alcohol ethoxylates.
[0112] 4. The composition of embodiment 3, wherein the two C10-C20 linear alcohol ethoxylates each have different moles of ethoxylation, one having from about 2 to about 5 moles of ethoxylation and the second having from about 6 to about 10 moles of ethoxylation.
[0113] 5. The composition of embodiment 4, wherein the C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation is in an amount of from about 10 wt. %to about 20 wt.%.
[0114] 6. The composition of any one of embodiments 1-5, wherein the C8-C16 branched alcohol ethoxylate has from about 3 to about 11 moles of ethoxylation.
[0115] 7. The composition of any one of embodiments 1-6, wherein the surfactant blend has two C8-C16 branched alcohol ethoxylates.
[0116] 8. The composition of embodiment 7, wherein the two C8-C16 branched alcohol ethoxylates each have different moles of ethoxylation, one having from about 2 to about 6 moles of ethoxylation and the second having from about 7 to about 11 moles of ethoxylation.
[0117] 9. The composition of embodiment 4, wherein the C8-C16 branched alcohol ethoxylate having from about 3 to about 6 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %.
[0118] 10. The composition of any one of embodiments 1-9, wherein the surfactant blend has two C10-C20 linear alcohol ethoxylates and two C8-C16 branched alcohol ethoxylates.
[0119] 11. The composition of any one of embodiments 1-10, wherein surfactant blend has two C10-C20 linear alcohol ethoxylates each having different moles of ethoxylation, one having from about 2 to about 5 moles of ethoxylation and the second having from about 6 to about 10 moles of ethoxylation; and wherein the surfactant blend has two C8-C16 branched alcohol ethoxylates each have different moles of ethoxylation, one having from about 2 to about 6 moles of ethoxylation and the second having from about 7 to about 11 moles of ethoxylation.
[0120] 12. The composition of embodiment 11, wherein the C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; wherein the C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation is in an amount of from about 10 wt. %to about 20 wt. %; wherein the C8-C16 branched alcohol ethoxylate having from about 2 to about 6 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %.
[0121] 13. The composition of any one of embodiments 1-12, wherein the chelant comprises an aminocarboxylic acid or salt thereof, gluconic acid or a salt thereof, or a mixture thereof.
[0122] 14. The composition of embodiment 13, wherein the chelant is selected from the group consisting of gluconic acid, N-hydroxyethylaminodiacetic acid, ethylenediaminetetraacetic acid (EDTA) , methylglycinediacetic acid (MGDA) , hydroxyethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, N-hydroxyethyl-ethylenediaminetriacetic acid (HEDTA) , glutamic acid N, N-diacetic acid (GLDA) , diethylenetriaminepentaacetic acid (DTPA) , iminodisuccinic acid (IDS) , ethylenediamine disuccinic acid (EDDS) , 3-hydroxy-2, 2-iminodisuccinic acid (HIDS) , hydroxyethyliminodiacetic acid (HEIDA) , and mixtures thereof.
[0123] 15. The composition of any one of embodiments 1-14, wherein the carrier is a mixture of water and a C1-C8 alkyl alcohol.
[0124] 16. The composition of any one of embodiments 1-15, further comprising an optical brightener.
[0125] 17. A laundering method comprising: (a) providing a soiled laundry item to a laundering machine; (b) providing the laundry detergent composition of any one of embodiments 1-16 to the laundering machine; (c) washing the soiled laundry item with the laundry detergent composition; (d) performing a rinse cycle in the laundering machine; and (e) draining water from the laundering machine; wherein the soiled laundry is cleaned such that soils are removed.
[0126] 18. The method of embodiment 17, wherein the soiled laundry is soiled with food soil, non-food oily soil, cosmetic soil, blood, grass stains, dirt, or a mixture thereof.
[0127] 19. The method of embodiment 17 or embodiment 18, wherein the soiled laundry item is stained and wherein the stains are removed by the laundering method.
[0128] 20. The method of any one of embodiments 17-19, wherein the soiled laundry item comprises one or more of silk fibers, linen fibers, cotton fibers, hemp fibers, angora fibers, bamboo fibers, polyester fibers, polyamide fibers, acrylic fibers, acetate fibers, wool, rayon, cashmere, satin, spandex, and blends thereof.
[0129] 21. The method of any one of embodiments 17-20, wherein the laundering machine is a commercial laundering machine.
[0130] EXAMPLES
[0131] Embodiments of the present disclosure are further defined in the following non-limiting Examples. It should be understood that these Examples, while indicating certain embodiments of the disclosure, are given by way of illustration only. From the above discussion and these Examples, one skilled in the art can ascertain the essential characteristics of this disclosure, and without departing from the spirit and scope thereof, can make various changes and modifications of the embodiments of the disclosure to adapt it to various usages and conditions. Thus, various modifications of the embodiments of the disclosure, in addition to those shown and described herein, will be apparent to those skilled in the art from the foregoing description. Such modifications are also intended to fall within the scope of the appended claims.
[0132] The following instruments and materials utilized in the Examples:
[0133] Commercially available tergotometer and spectrophotometer were employed. Soiled fabrics: either commercial or laboratory prepared soiled cloth. The laboratory soiled cloths included cotton based textiles soiled with graphite and lanolin.
[0134] The following procedure was utilized for the following Examples:
[0135] A wash performance test was conducted on various test fabrics. Additionally, each cloth had various types of stains and soil types, as described in Table 1 below.
[0136] Each test fabric was cut, specifically two for each test condition. Additionally, each fabric had a gray swatch and white swatch. Each swatch was read.
[0137] The tergotometers were turned on and set to a standard rpm of 100.1000 ml of water was placed into the tergotometer pots at a desired temperature of 40 ℃. Each detergent was added into one of the pots within the tergotometers and agitated until dissolved. Two soiled swatches of the same type were placed in each pot and agitated for ten minutes before agitation was turned off. The swatches were removed and rinsed thoroughly in cool tap water before air drying them. Then the swatches were re-read under the HunterLab UltraScan.
[0138] Data Glossary
[0139] L*--The light to dark number in the color solid. 0=totally black, 100=totally white.
[0140] This is the number used for Percent Soil Removal calculations.
[0141] a*--The red to green number in the color solid. A positive number is toward red and a negative number is toward green.
[0142] b*--The yellow to blue number in the color solid. A positive number is toward yellow and a negative number is toward blue.
[0143] WI 313--Whiteness Index. This an index of overall whiteness that also takes the "b" number into account. The higher the number, the whiter the sample.
[0144] Percent Soil Removal Formula
[0145] The results of test were calculated with the following formula:
[0146] Soil Removal %= (L *after-L *initial) / (96-L *initial) *100. *96 is considered a clean number.
[0147] CIELAB Test Procedure:
[0148] The resulting color was measured using a CIELAB type protocol (as described in the reference: Measurement and Control of the Optical Properties of Paper, by S. J. Popson et al., Technidyne Corp., New Albany, Ind. (1996) ) . The results were measured according to the following data sets:
[0149] L*--The light to dark number in the color solid. 0=totally black, 100=totally white.
[0150] This is the number used for Percent Soil Removal calculations.
[0151] a*--The red to green number in the color solid. A positive number is toward red and a negative number is toward green.
[0152] b*--The yellow to blue number in the color solid. A positive number is toward yellow and a negative number is toward blue.
[0153] EXAMPLE 1
[0154] Other swatches chosen for wash wheel testing included the following as shown in Table 3 where CO represents cotton, PES represents polyester, and both is a polyester / cotton blend.
[0155] TABLE 3
[0156] Two example formulations (Formulas 1 and 2) of the liquid laundry detergent compositions disclosed herein were prepared as provided in Table 4 and tested.
[0157] TABLE 4
[0158] Formulas 1 and 2 are of Table 4, the difference being that Formula 2 included higher concentration of the nonionic surfactants within the range of Table 4. A control laundry detergent (Formula 3) was used for comparison, which was a commercially available laundry detergent. Figure 1 shows the results of testing using three formulas. Figure 1 demonstrates that the laundry detergent composition was tested using a textile substrate, primarily cotton. On each textile substrate, each sample was stained with various soils as shown in the legend on Figure 1 and then tested with 3 different formulas as shown on the x axis. The graph shows the percentage of soil removed based off calculations photometric reflection value of each swatch using the CIELAB protocol (specifically the L*, a*, and b*values as outlined above) and Soil removal equation outlined previously. As the graph shows, Formula 2 proved to be the most effective against each of the different types of soil stains.
[0159] Figure 2 shows the results of testing using the same three formulas in Figure 1. The laundry detergent composition was tested using a textile substrate, primarily cotton. On each textile substrate, each sample was stained with various soils with multiple different types of soil stains, as described on the x axis. The graph shows the percentage of soil removed based off calculations of the photometric reflection value of each swatch using the CIELAB protocol (specifically the L*, a*, and b*values as outlined above) and Soil removal equation outlined previously. As the graph shows, Formula 1 proved to be most effective against blood, Formula 2 proved to be the most effective against pigment / vegetable oil / milk stains, and formula 3 proved to be most effective against blood stains.
[0160] EXAMPLE 2
[0161] Figure 3 shows the results of the testing using Formulas A, B, C, D, E, F, G, and a separate Control. Each of the formulas were tested using a textile substrate and various soil stains including Sebum, P / Veg fat-P / C, Carbon black and Blood stains. The base formula included a different nonionic surfactant blend, a carrier (mixture of isopropyl alcohol, water, and polypropylene glycol) , gluconic acid and EDTA as chelants, and an optical brightener. The nonionic surfactant blends used in the formulas are provided in Table 5.
[0162] Table 5
[0163] In Figure 3, the X axis denotes each formula. As can be seen, Formula G appears to be the most effective against the four types of stains used and closest to the commercially available detergent (control) .
[0164] Figure 4 shows the results of the testing using Formulas H, I, J, K, L, M and a Control. Each of the formulas were tested using a textile substrate and various soil stains including Sebum, P / Veg fat-P / C, Carbon black and Blood stains. The base formula included a different nonionic surfactant blend, a carrier (mixture of isopropyl alcohol, water, and polypropylene glycol) , a chelant or mixture of chelants, and an optical brightener. The nonionic surfactant blends used in the formulas are provided in Table 6.
[0165] Table 6
[0166] The X axis denotes each formula. As shown in the figures, Formula M appears to be the most effective against the four types of stains used and closest to the commercially available detergent (control) . Thus, the goal of achieving similar results with a more cost effective formulation is nearly achieved.
[0167] Figure 5 shows the results of the testing using Formulas N, O, P, Q, R and a Control. Each of the formulas were tested using a textile substrate and various soil stains including Sebum, P / Veg fat-P / C, Carbon black and Blood stains. The base formula included a different nonionic surfactant blend, a carrier (mixture of isopropyl alcohol and water) , a chelant or mixture of chelants, and an optical brightener. The nonionic surfactant blends used in the formulas are provided in Table 7.
[0168] Table 7
[0169] The X axis denotes each formula. As shown in the figures, Formula R appears to be the most effective against the four types of stains used and stronger than the control. Further, other example formulations also provided better soil removal for various of the soils compared to the commercially available detergent (control) . This demo
[0170] It is to be understood that while the invention has been described in conjunction with the detailed description thereof, the foregoing description is intended to illustrate, and not limit the scope of the invention, which is defined by the scope of the appended claims. Other embodiments, advantages, and modifications are within the scope of the following claims. Any reference to accompanying drawings which form a part hereof, are shown, by way of illustration only. It is understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present disclosure. The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilized for realizing the invention in diverse forms thereof.
Claims
1.A laundry detergent composition comprising:from about 10 wt. %to about 35 wt. %of a surfactant blend having at least three surfactants selected from the group consisting of a C10-C20 linear alcohol ethoxylate, a C8-C16 branched alcohol ethoxylate, and mixtures thereof;from about 2 wt. %to about 15 wt. %of a chelant; andfrom 50 wt. %to about 90 wt. %of a carrier.2.The composition of claim 1, wherein the C10-C20 linear alcohol ethoxylate has from about 2 to about 10 moles of ethoxylation.3.The composition of claim 1 or claim 2, wherein the surfactant blend has two C10-C20 linear alcohol ethoxylates.4.The composition of claim 3, wherein the two C10-C20 linear alcohol ethoxylates each have different moles of ethoxylation, one having from about 2 to about 5 moles of ethoxylation and the second having from about 6 to about 10 moles of ethoxylation.5.The composition of claim 4, wherein the C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation is in an amount of from about 10 wt. %to about 20 wt. %.6.The composition of any one of claims 1-5, wherein the C8-C16 branched alcohol ethoxylate has from about 3 to about 11 moles of ethoxylation.7.The composition of any one of claims 1-6, wherein the surfactant blend has two C8-C16 branched alcohol ethoxylates.8.The composition of claim 7, wherein the two C8-C16 branched alcohol ethoxylates each have different moles of ethoxylation, one having from about 2 to about 6 moles of ethoxylation and the second having from about 7 to about 11 moles of ethoxylation.9.The composition of claim 4, wherein the C8-C16 branched alcohol ethoxylate having from about 3 to about 6 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %.10.The composition of any one of claims 1-9, wherein the surfactant blend has two C10-C20 linear alcohol ethoxylates and two C8-C16 branched alcohol ethoxylates.11.The composition of any one of claims 1-10, wherein surfactant blend has two C10-C20 linear alcohol ethoxylates each having different moles of ethoxylation, one having from about 2 to about 5 moles of ethoxylation and the second having from about 6 to about 10 moles of ethoxylation; and wherein the surfactant blend has two C8-C16 branched alcohol ethoxylates each have different moles of ethoxylation, one having from about 2 to about 6 moles of ethoxylation and the second having from about 7 to about 11 moles of ethoxylation.12.The composition of claim 11, wherein the C10-C20 linear alcohol ethoxylate having from about 2 to about 5 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; wherein the C10-C20 linear alcohol ethoxylate having from about 6 to about 10 moles of ethoxylation is in an amount of from about 10 wt. %to about 20 wt. %; wherein the C8-C16 branched alcohol ethoxylate having from about 2 to about 6 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %; and wherein the C8-C16 branched alcohol ethoxylate having from about 7 to about 11 moles of ethoxylation is in an amount of from about 1 wt. %to about 5 wt. %.13.The composition of any one of claims 1-12, wherein the chelant comprises an aminocarboxylic acid or salt thereof, gluconic acid or a salt thereof, or a mixture thereof.14.The composition of claim 13, wherein the chelant is selected from the group consisting of gluconic acid, N-hydroxyethylaminodiacetic acid, ethylenediaminetetraacetic acid (EDTA) , methylglycinediacetic acid (MGDA) , hydroxyethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, N-hydroxyethyl-ethylenediaminetriacetic acid (HEDTA) , glutamic acid N, N-diacetic acid (GLDA) , diethylenetriaminepentaacetic acid (DTPA) , iminodisuccinic acid (IDS) , ethylenediamine disuccinic acid (EDDS) , 3-hydroxy-2, 2-iminodisuccinic acid (HIDS) , hydroxyethyliminodiacetic acid (HEIDA) , and mixtures thereof.15.The composition of any one of claims 1-14, wherein the carrier is a mixture of water and a C1-C8 alkyl alcohol.16.The composition of any one of claims 1-15, further comprising an optical brightener.17.A laundering method comprising:(a) providing a soiled laundry item to a laundering machine;(b) providing the laundry detergent composition of any one of claims 1-16 to the laundering machine;(c) washing the soiled laundry item with the laundry detergent composition;(d) performing a rinse cycle in the laundering machine; and(e) draining water from the laundering machine;wherein the soiled laundry is cleaned such that soils are removed.18.The method of claim 17, wherein the soiled laundry is soiled with food soil, non-food oily soil, cosmetic soil, blood, grass stains, dirt, or a mixture thereof.19.The method of claim 17 or claim 18, wherein the soiled laundry item is stained and wherein the stains are removed by the laundering method.20.The method of any one of claims 17-19, wherein the soiled laundry item comprises one or more of silk fibers, linen fibers, cotton fibers, hemp fibers, angora fibers, bamboo fibers, polyester fibers, polyamide fibers, acrylic fibers, acetate fibers, wool, rayon, cashmere, satin, spandex, and blends thereof.21.The method of any one of claims 17-20, wherein the laundering machine is a commercial laundering machine.
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