WO2008087497A1 - Laundry care composition comprising a whitening agent for cellulosic substrates - Google Patents

Laundry care composition comprising a whitening agent for cellulosic substrates Download PDF

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WO2008087497A1
WO2008087497A1 PCT/IB2007/050192 IB2007050192W WO2008087497A1 WO 2008087497 A1 WO2008087497 A1 WO 2008087497A1 IB 2007050192 W IB2007050192 W IB 2007050192W WO 2008087497 A1 WO2008087497 A1 WO 2008087497A1
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ch
whitening agent
laundry care
care composition
preferably
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PCT/IB2007/050192
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French (fr)
Inventor
Eugene Steven Sadlowski
Mark Robert Sivik
Michael David Cummings
Donna D'angelo Morrall
Kevin Lee Kott
Keith Homer Baker
Brian Joseph Loughnane
Michael A Valenti
Laurent D Kieken
Xiaoyong Michael Hong
Eduardo Torres
Dominick J Valenti
Patrick D Moore
Leonard J Starks
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The Procter & Gamble Company
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Priority to PCT/IB2007/050192 priority Critical patent/WO2008087497A1/en
Publication of WO2008087497A1 publication Critical patent/WO2008087497A1/en

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    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/40Dyes ; Pigments
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/40Dyes ; Pigments
    • C11D3/42Brightening agents ; Blueing agents

Abstract

This invention relates to laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions that comprise whitening agents for cellulosic substrates. The whitening agents are comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by having a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPaO.5.

Description

NOVEL WHITENING AGENTS FOR CELLULOSIC SUBSTRATES

TECHNICAL FIELD This invention relates to novel whitening agents for cellulosic substrates. The whitening agents are comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by having a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPa0 . These whitening agents may be ideal for use in laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions.

BACKGROUND

The use of whitening agents, either optical brighteners or blueing agents, in textile applications is well known in the prior art. As textile substrates age, their color tends to fade or yellow due to exposure to light, air, soil, and natural degradation of the fibers that comprise the substrates. Thus, the purpose of whitening agents is generally to visually brighten these textile substrates and counteract the fading and yellowing of the substrates. Typically, whitening agents may be found in laundry detergents, fabric softeners, or rinse aids and are therefore applied to textile substrates during the laundering process. However, it is important that whitening agents function to brighten treated textile substrates without causing undesirable staining of the textile substrates.

Cellulosic substrates, in particular, tend to exhibit a yellow hue after exposure to light, air, and/or soiling. This yellowness is often difficult to reverse by normal laundering procedures. As a result, there exists a need for improved whitening agents which are capable of eliminating the yellowness exhibited by ageing cellulosic substrates. By utilizing such improved whitening agents, the life of the textile substrates, such as clothing articles, table linens, etc., may be extended.

The present invention offers advantages over US Patents No. 4,137,243, 5,039,782 and US Patent Application Publication No. 2005/0288206 as this invention takes advantage of compounds having a Hansen Solubility Parameter of less than or equal to about 17 MPa05 and which emit light with wavelengths in the range of blue, red, violet, purple, or combinations thereof upon exposure to ultraviolet light (or, they absorb light to produce the same shades) in order to neutralize the yellowness of cellulosic substrates. These compounds function ideally as whitening agents for cellulosic substrates and may be incorporated into laundry detergent formulations for use by consumers during the laundering process.

SUMMARY OF INVENTION This invention relates to novel whitening agents for cellulosic substrates. The whitening agents are comprised of at least two components: at least one chromophore component and at least one polymeric component. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to ultraviolet light, or they may absorb light to reflect these same shades. The whitening agents are further characterized by having a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPa0 . This invention also relates to laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions that comprise such whitening agents.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a graphical representation of dispersion component values of the Hansen Solubility Parameter versus CIELab b* values for various whitening agents after 1 rinse cycle.

DETAILED DESCRIPTION

As used herein, "cellulosic substrates" are intended to include any substrate which comprises at least a majority by weight of cellulose. Cellulose may be found in wood, cotton, linen, jute, and hemp. Cellulosic substrates may be in the form of powders, fibers, pulp and articles formed from powders, fibers and pulp. Cellulosic fibers, include, without limitation, cotton, rayon

(regenerated cellulose), acetate (cellulose acetate), triacetate (cellulose triacetate), and mixtures thereof. Articles formed from cellulosic fibers include textile articles such as fabrics. Articles formed from pulp include paper. As used herein, the term "laundry care composition" includes, unless otherwise indicated, granular, powder, liquid, gel, paste, bar form and/or flake type washing agents and/or fabric treatment compositions.

As used herein, the term "fabric treatment composition" includes, unless otherwise indicated, fabric softening compositions, fabric enhancing compositions, fabric freshening compositions and combinations there of. Such compositions may be, but need not be rinse added compositions.

As used herein, the articles including "the", "a" and "an" when used in a claim, are understood to mean one or more of what is claimed or described. As used herein, the terms "include", "includes" and "including" are meant to be non-limiting.

The test methods disclosed in the Test Methods Section of the present application should be used to determine the respective values of the parameters of Applicants' inventions. Unless otherwise noted, all component or composition levels are in reference to the active portion of that component or composition, and are exclusive of impurities, for example, residual solvents or by-products, which may be present in commercially available sources of such components or compositions.

All percentages and ratios are calculated by weight unless otherwise indicated. All percentages and ratios are calculated based on the total composition unless otherwise indicated. It should be understood that every maximum numerical limitation given throughout this specification includes every lower numerical limitation, as if such lower numerical limitations were expressly written herein. Every minimum numerical limitation given throughout this specification will include every higher numerical limitation, as if such higher numerical limitations were expressly written herein. Every numerical range given throughout this specification will include every narrower numerical range that falls within such broader numerical range, as if such narrower numerical ranges were all expressly written herein.

All documents cited are, in relevant part, incorporated herein by reference; the citation of any document is not to be construed as an admission that it is prior art with respect to the present invention.

The whitening agents of the present invention may be dyes, pigments, or polymeric colorants comprising a chromophore constituent and a polymeric constituent. The chromophore constituent is characterized in that it emits or absorbs wavelength in the range of blue, red, violet, purple, or combinations thereof upon exposure to light. Preferably, the chromophore constituent exhibits an absorbance spectrum value from about 520 nanometers to about 640 nanometers in water, and more preferably from about 570 nanometers to about 610 nanometers in water. Preferably, the chromophore constituent exhibits an emission spectrum value from about 400 nanometers to about 480 nanometers in water.

Examples of suitable polymeric constituents include polyoxyalkylene chains having multiple repeating units. Preferably the polymeric constituents include polyoxyalkylene chains having from 2 to about 20 repeating units, and more preferably from 2 to about 10 or even from about 4 to about 6 repeating units. Non-limiting examples of polyoxyalkylene chains include ethylene oxide, propylene oxide, glycidol oxide, butylene oxide and mixtures thereof.

The whitening agent of the present invention may be characterized by the following structure:

Figure imgf000005_0001

Wherein Ri and R2 can independently be selected from: a) [(CH2CR1HO)x(CH2CR11HCOyH] wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 5; wherein y > 1; and wherein z = 0 to 5; b) Ri = alkyl, aryl or aryl alkyl and R2 = [(CH2CR'HO)x(CH2CR"HO)yH] wherein R' is selected from the group consisting of H, CH3, CH2θ(CH2CH2θ)zH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 10; wherein y > 1; and wherein z = 0 to 5 ; c) Ri = [CH2CH2(OR3)CH2OR4] and R2 = [CH2CH2(O R3)CH2O R4] wherein R3 is selected from the group consisting of H, (CH2CH2O)ZH, and mixtures thereof; and wherein z = 0 to 10; wherein R4 is selected from the group consisting of (Ci-Ci6)alkyl , aryl groups, and mixtures thereof; and d) wherein Rl and R2 can independently be selected from the amino addition product of styrene oxide, glycidyl methyl ether, isobutyl glycidyl ether, isopropylglycidyl ether, t- butyl glycidyl ether, 2-ethylhexylgycidyl ether, and glycidylhexadecyl ether, followed by the addition of from 1 to 10 alkylene oxide units.

A preferred whitening agent of the present invention may be characterized by the following structure:

Figure imgf000006_0001

wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 5; wherein y > 1; and wherein z = 0 to 5. Another characteristic of the whitening agent of the present invention is its affinity for cellulosic material. Affinity may be determined quantitatively from using the dispersion force component of the Hansen Solubility Parameter. The Hansen Solubility Parameter is a three component measuring system that includes a dispersion force component (δd), a hydrogen bonding component (δh), and a polar component (δp). The Hansen Solubility Parameter "δ" is derived from the fact that the total cohesive energy, which is the energy required to break all the cohesive bonds, is the combination of the dispersion forces (d), the molecular dipole forces (p), and the hydrogen bonding forces (h) according to the following equation:

Figure imgf000007_0001

Dispersion forces are weak attractive forces between non-polar molecules. The magnitude of these forces depends on the polarizability of the molecule, and the dispersion Hansen Solubility Parameter, δd, typically increases with increasing volume (and size) of the molecule, all other properties being roughly equal. The parameter "δp" increases with increasing polarity of the molecule.

Hansen Solubility Parameters are calculated at 250C with ChemSW's Molecular Modeling Pro v.6.1.9 software package which uses an unpublished proprietary algorithm that is based on values published in the Handbook of Solubility Parameters and Other Parameters by Allan F.M. Barton (CRC Press, 1983) for solvents obtained experimentally by Hansen. All values of the Hansen Solubility Parameter reported herein are in units of MPa0 (square root of megaPascals). Hansen originally determined the solubility parameter of solvents for polymer solutions. While Hansen Solubility Parameter calculation has been applied successfully to a wide range of applications such as solubility of biological materials, characterization of pigments, fillers and fibers, etc., it has not heretofore been adapted to polymeric colorants.

Thus, for the effective whitening agents of the present invention, it is preferable that the dispersion force component of the Hansen Solubility Parameter, δd, is less than or equal to about 17, and more preferably less than or equal to about 15. It may also be desirable that the dispersion force component of the Hansen Solubility Parameter is from about 12 to about 17, and more preferably from about 12 to about 15. While the affinity of the whitening agent to the cellulosic material appears to correlate very well with the Hansen Solubility Dispersion Component parameter, the invention is not limited to the use of δd. Other molecular descriptors, which are directly or indirectly related to δd such as, for example, polarizability, radius of gyration, molecular volume, and Jurs descriptors based on partial atomic charges mapped on solvent-accessible surface area, were also considered. However, the goodness of fit of the univariate correlations of the affinity with these descriptors was not as good as with δd.

Without being bound by theory, it is believed that the affinity of the whitening agents for the cellulose substrates may be ascribed to Van der Waals forces, the attractive forces that exist between electrically neutral molecules in close proximity to one another. It is also postulated that if the cellulose substrate is comprised of porous regions, the whitening agent, or portions thereof, may be physically trapped in the pores of the cellulose, depending on the size of the molecule as compared to the diameter of the pores. This physical entrapment may provide some level of durability to protect the whitening agent from being easily removed form the cellulose substrate upon exposure to washing or rinsing.

The whitening agent's described in the present specification may be incorporated into a laundry care composition including but not limited to laundry detergents and fabric care compositions. Such compositions comprise one or more of said whitening agents and a laundry care ingredient. The whitening agent may be added to cellulose substrates using a variety of application techniques. For application to cellulose-containing textile substrates, the whitening agent is preferably included as an additive in laundry detergent. Thus, application to the cellulose- containing textile substrate actually occurs when a consumer adds laundry detergent to a washing machine. Similarly, RAFS compositions are typically added in the rinse cycle, which is after the detergent solution has been used and replaced with the rinsing solution in typical laundering processes. For application to cellulosic paper substrates, the whitening agent may be added to the paper pulp mixture prior to formation of the final paper product.

The laundry care compositions including laundry detergents may be in solid or liquid form, including a gel form. The laundry detergent composition comprises a surfactant in an amount sufficient to provide desired cleaning properties. The whitening agent may be present in the laundry detergent composition in an amount from about 0.0001% to about 10% by weight of the composition, more preferably from about 0.0001% to about 5% by weight of the composition, and even more preferably from about 0.0001% to about 1% by weight of the composition.

The laundry detergent composition comprises a surfactant in an amount sufficient to provide desired cleaning properties. In one embodiment, the laundry detergent composition comprises, by weight, from about 5% to about 90% of the surfactant, and more specifically from about 5% to about 70% of the surfactant, and even more specifically from about 5% to about 40%. The surfactant may comprise anionic, nonionic, cationic, zwitterionic and/or amphoteric surfactants. In a more specific embodiment, the detergent composition comprises anionic surfactant, nonionic surfactant, or mixtures thereof.

Suitable anionic surfactants useful herein can comprise any of the conventional anionic surfactant types typically used in liquid detergent products. These include the alkyl benzene sulfonic acids and their salts as well as alkoxylated or non-alkoxylated alkyl sulfate materials.

Exemplary anionic surfactants are the alkali metal salts of C.sub.10-16 alkyl benzene sulfonic acids, preferably C.sub.11-14 alkyl benzene sulfonic acids. Preferably the alkyl group is linear and such linear alkyl benzene sulfonates are known as "LAS". Alkyl benzene sulfonates, and particularly LAS, are well known in the art. Such surfactants and their preparation are described for example in U.S. Pat. Nos. 2,220,099 and 2,477,383. Especially preferred are the sodium and potassium linear straight chain alkylbenzene sulfonates in which the average number of carbon atoms in the alkyl group is from about 11 to 14. Sodium Cn-Ci4, e.g., Cn, LAS is a specific example of such surfactants.

Another exemplary type of anionic surfactant comprises ethoxylated alkyl sulfate surfactants. Such materials, also known as alkyl ether sulfates or alkyl polyethoxylate sulfates, are those which correspond to the formula: R'— O— (C2H4O)n-- SO3M wherein R' is a C8-C20 alkyl group, n is from about 1 to 20, and M is a salt-forming cation. In a specific embodiment, R' is Ci0-Ci8 alkyl, n is from about 1 to 15, and M is sodium, potassium, ammonium, alkylammonium, or alkanolammonium. In more specific embodiments, R' is a Ci2-Ci6, n is from about 1 to 6 and M is sodium.

The alkyl ether sulfates will generally be used in the form of mixtures comprising varying R' chain lengths and varying degrees of ethoxylation. Frequently such mixtures will inevitably also contain some non-ethoxylated alkyl sulfate materials, i.e., surfactants of the above ethoxylated alkyl sulfate formula wherein n=0. Non-ethoxylated alkyl sulfates may also be added separately to the compositions of this invention and used as or in any anionic surfactant component which may be present. Specific examples of non-alkoxylated, e.g., non-ethoxylated, alkyl ether sulfate surfactants are those produced by the sulfation of higher C8-C20 fatty alcohols. Conventional primary alkyl sulfate surfactants have the general formula: ROSO3-M"1" wherein R is typically a linear C8-C20 hydrocarbyl group, which may be straight chain or branched chain, and M is a water-solubilizing cation. In specific embodiments, R is a C10-C15 alkyl, and M is alkali metal, more specifically R is Ci2-Ci4 and M is sodium.

Specific, non- limiting examples of anionic surfactants useful herein include: a) Cn-Ci8 alkyl benzene sulfonates (LAS); b) C10-C20 primary, branched-chain and random alkyl sulfates (AS); c) CiO-Ci8 secondary (2,3) alkyl sulfates having formulae (I) and (II): wherein M in formulae (I) and (II) is hydrogen or a cation which provides charge neutrality, and all M units, whether associated with a surfactant or adjunct ingredient, can either be a hydrogen atom or a cation depending upon the form isolated by the artisan or the relative pH of the system wherein the compound is used, with non-limiting examples of preferred cations including sodium, potassium, ammonium, and mixtures thereof, and x is an integer of at least about 7, preferably at least about 9, and y is an integer of at least 8, preferably at least about 9; d) CiO-Ci8 alkyl alkoxy sulfates (AE.sub.xS) wherein preferably x is from 1-30; e) CiO-Ci8 alkyl alkoxy carboxylates preferably comprising 1-5 ethoxy units; f) mid-chain branched alkyl sulfates as discussed in U.S. Pat. No. 6,020,303 and U.S. Pat. No. 6,060,443; g) mid-chain branched alkyl alkoxy sulfates as discussed in U.S. Pat. No. 6,008,181 and U.S. Pat. No. 6,020,303; h) modified alkylbenzene sulfonate (MLAS) as discussed in WO 99/05243, WO 99/05242, WO 99/05244, WO 99/05082, WO 99/05084, WO 99/05241, WO 99/07656, WO 00/23549, and WO 00/23548; i) methyl ester sulfonate (MES); and j) alpha-olefin sulfonate (AOS). Suitable nonionic surfactants useful herein can comprise any of the conventional nonionic surfactant types typically used in liquid detergent products. These include alkoxylated fatty alcohols and amine oxide surfactants. Preferred for use in the liquid detergent products herein are those nonionic surfactants which are normally liquid.

Suitable nonionic surfactants for use herein include the alcohol alkoxylate nonionic surfactants. Alcohol alkoxylates are materials which correspond to the general formula: R1(CmH2mO)nOH wherein R1 is a Cg-Ciό alkyl group, m is from 2 to 4, and n ranges from about 2 to 12. Preferably R1 is an alkyl group, which may be primary or secondary, that comprises from about 9 to 15 carbon atoms, more preferably from about 10 to 14 carbon atoms. In one embodiment, the alkoxylated fatty alcohols will also be ethoxylated materials that contain from about 2 to 12 ethylene oxide moieties per molecule, more preferably from about 3 to 10 ethylene oxide moieties per molecule.

The alkoxylated fatty alcohol materials useful in the liquid detergent compositions herein will frequently have a hydrophilic-lipophilic balance (HLB) which ranges from about 3 to 17. More preferably, the HLB of this material will range from about 6 to 15, most preferably from about 8 to 15. Alkoxylated fatty alcohol nonionic surfactants have been marketed under the tradenames Neodol and Dobanol by the Shell Chemical Company.

Another suitable type of nonionic surfactant useful herein comprises the amine oxide surfactants. Amine oxides are materials which are often referred to in the art as "semi-polar" nonionics. Amine oxides have the formula: R(EO)x(PO)y(BO)zN(O)(CH2R')2.qH2O. In this formula, R is a relatively long-chain hydrocarbyl moiety which can be saturated or unsaturated, linear or branched, and can contain from 8 to 20, preferably from 10 to 16 carbon atoms, and is more preferably Ci2-Ci6 primary alkyl. R' is a short-chain moiety, preferably selected from hydrogen, methyl and -CH2OH. When x+y+z is different from 0, EO is ethyleneoxy, PO is propyleneneoxy and BO is butyleneoxy. Amine oxide surfactants are illustrated by Ci2-I4 alkyldimethyl amine oxide.

Non-limiting examples of nonionic surfactants include: a) Ci2-CiS alkyl ethoxylates, such as, NEODOL® nonionic surfactants from Shell; b) CO-CI2 alkyl phenol alkoxylates wherein the alkoxylate units are a mixture of ethyleneoxy and propyleneoxy units; c) Ci2-Ci8 alcohol and C6- Ci2 alkyl phenol condensates with ethylene oxide/propylene oxide block polymers such as Pluronic® from BASF; d) C14-C22 mid-chain branched alcohols, BA, as discussed in U.S. Pat. No. 6,150,322; e) C14-C22 mid-chain branched alkyl alkoxylates, BAEx, wherein x if from 1-30, as discussed in U.S. Pat. No. 6,153,577, U.S. Pat. No. 6,020,303 and U.S. Pat. No. 6,093,856; f) Alkylpolysaccharides as discussed in U.S. Pat. No. 4,565,647 to Llenado, issued Jan. 26, 1986; specifically alkylpolyglycosides as discussed in U.S. Pat. No. 4,483,780 and U.S. Pat. No. 4,483,779; g) Polyhydroxy fatty acid amides as discussed in U.S. Pat. No. 5,332,528, WO 92/06162, WO 93/19146, WO 93/19038, and WO 94/09099; and h) ether capped poly(oxyalkylated) alcohol surfactants as discussed in U.S. Pat. No. 6,482,994 and WO 01/42408.

In the laundry detergent compositions herein, the detersive surfactant component may comprise combinations of anionic and nonionic surfactant materials. When this is the case, the weight ratio of anionic to nonionic will typically range from 10:90 to 90: 10, more typically from 30:70 to 70:30.

Cationic surfactants are well known in the art and non-limiting examples of these include quaternary ammonium surfactants, which can have up to 26 carbon atoms. Additional examples include a) alkoxylate quaternary ammonium (AQA) surfactants as discussed in U.S. Pat. No.

6,136,769; b) dimethyl hydroxyethyl quaternary ammonium as discussed in U.S. Pat. No.

6,004,922; c) polyamine cationic surfactants as discussed in WO 98/35002, WO 98/35003, WO

98/35004, WO 98/35005, and WO 98/35006; d) cationic ester surfactants as discussed in U.S.

Pat. Nos. 4,228,042, 4,239,660 4,260,529 and U.S. Pat. No. 6,022,844; and e) amino surfactants as discussed in U.S. Pat. No. 6,221,825 and WO 00/47708, specifically amido propyldimethyl amine (APA).

Non-limiting examples of zwitterionic surfactants include derivatives of secondary and tertiary amines, derivatives of heterocyclic secondary and tertiary amines, or derivatives of quaternary ammonium, quaternary phosphonium or tertiary sulfonium compounds. See U.S. Pat. No. 3,929,678 to Laughlin et al., issued Dec. 30, 1975 at column 19, line 38 through column 22, line 48, for examples of zwitterionic surfactants; betaine, including alkyl dimethyl betaine and cocodimethyl amidopropyl betaine, C$ to Ci8 (preferably Ci2 to Ci8) amine oxides and sulfo and hydroxy betaines, such as N-alkyl-N,N-dimethylammino-l -propane sulfonate where the alkyl group can be Cg to Ci8, preferably Ci0 to C14.

Non-limiting examples of ampholytic surfactants include aliphatic derivatives of secondary or tertiary amines, or aliphatic derivatives of heterocyclic secondary and tertiary amines in which the aliphatic radical can be straight- or branched-chain. One of the aliphatic substituents comprises at least about 8 carbon atoms, typically from about 8 to about 18 carbon atoms, and at least one comprises an anionic water- solubilizing group, e.g. carboxy, sulfonate, sulfate. See U.S. Pat. No. 3,929,678 to Laughlin et al., issued Dec. 30, 1975 at column 19, lines 18-35, for examples of ampholytic surfactants.

As noted, the compositions may be in the form of a solid, either in tablet or particulate form, including, but not limited to particles, flakes, or the like, or the compositions may be in the form of a liquid. The liquid detergent compositions comprise an aqueous, non-surface active liquid carrier. Generally, the amount of the aqueous, non-surface active liquid carrier employed in the compositions herein will be effective to solubilize, suspend or disperse the composition components. For example, the compositions may comprise, by weight, from about 5% to about 90%, more specifically from about 10% to about 70%, and even more specifically from about 20% to about 70% of the aqueous, non-surface active liquid carrier.

The most cost effective type of aqueous, non-surface active liquid carrier is, of course, water itself. Accordingly, the aqueous, non-surface active liquid carrier component will generally be mostly, if not completely, comprised of water. While other types of water-miscible liquids, such alkanols, diols, other polyols, ethers, amines, and the like, have been conventionally been added to liquid detergent compositions as co-solvents or stabilizers, for purposes of the present invention, the utilization of such water-miscible liquids should be minimized to hold down composition cost. Accordingly, the aqueous liquid carrier component of the liquid detergent products herein will generally comprise water present in concentrations ranging from about 5% to about 90%, more preferably from about 20% to about 70%, by weight of the composition. Detergent compositions may also contain bleaching agents. Suitable bleaching agents include, for example, hydrogen peroxide sources, such as those described in detail in the herein incorporated Kirk Othmer's Encyclopedia of Chemical Technology, 4th Ed (1992, John Wiley & Sons), Vol. 4, pp. 271-300 "Bleaching Agents (Survey)." These hydrogen peroxide sources include the various forms of sodium perborate and sodium percarbonate, including various coated and modified forms of these compounds.

The preferred source of hydrogen peroxide used herein can be any convenient source, including hydrogen peroxide itself. For example, perborate, e.g., sodium perborate (any hydrate but preferably the mono- or tetra-hydrate), sodium carbonate peroxyhydrate or equivalent percarbonate salts, sodium pyrophosphate peroxyhydrate, urea peroxyhydrate, or sodium peroxide can be used herein. Also useful are sources of available oxygen such as persulfate bleach (e.g., OXONE, manufactured by DuPont). Sodium perborate monohydrate and sodium percarbonate are particularly preferred. Mixtures of any convenient hydrogen peroxide sources can also be used.

A suitable percarbonate bleach comprises dry particles having an average particle size in the range from about 500 micrometers to about 1,000 micrometers, not more than about 10% by weight of said particles being smaller than about 200 micrometers and not more than about 10% by weight of said particles being larger than about 1,250 micrometers. Optionally, the percarbonate can be coated with a silicate, borate or water-soluble surfactants. Percarbonate is available from various commercial sources such as FMC, Solvay and Tokai Denka.

Compositions of the present invention may also comprise as the bleaching agent a chlorine-type bleaching material. Such agents are well known in the art, and include for example sodium dichloroisocyanurate ("NaDCC"). However, chlorine-type bleaches are less preferred for compositions which comprise enzymes.

(a) Bleach Activators - Preferably, the peroxygen bleach component in the composition is formulated with an activator (peracid precursor). The activator is present at levels of from about

0.01%, preferably from about 0.5%, more preferably from about 1% to about 15%, preferably to about 10%, more preferably to about 8%, by weight of the composition. A bleach activator as used herein is any compound which, when used in conjunction with a hydrogen peroxide, source leads to the in situ production of the peracid corresponding to the bleach activator. Various non- limiting examples of activators are disclosed in U.S. Patent Nos. 5,576,282; 4,915,854 and 4,412,934. See also U.S. Patent No. 4,634,551 for other typical bleaches and activators useful herein.

Preferred activators are selected from the group consisting of tetraacetyl ethylene diamine

(TAED), benzoylcaprolactam (BzCL), 4-nitrobenzoylcaprolactam, 3-chlorobenzoylcaprolactam, benzoyloxybenzenesulphonate (BOBS), nonanoyloxybenzenesulphonate (NOBS), phenyl benzoate (PhBz), decanoyloxybenzenesulphonate (CχQ-OBS), benzoylvalerolactam (BZVL), octanoyloxybenzenesulphonate (Cg-OBS), perhydrolyzable esters and mixtures thereof, most preferably benzoylcaprolactam and benzoylvalerolactam. Particularly preferred bleach activators in the pH range from about 8 to about 11 are those selected having an OBS or VL leaving group. Preferred hydrophobic bleach activators include, but are not limited to, nonanoyloxybenzene- sulphonate (NOBS); 4-[N-(nonanoyl) amino hexanoyloxy] -benzene sulfonate sodium salt (NACA-OBS), an example of which is described in U.S. Patent No. 5,523,434; dodecanoyloxybenzenesulphonate (LOBS or Cχ2"0BS); 10-undecenoyloxybenzenesulfonate

(UDOBS or C^-OBS with unsaturation in the 10 position); and decanoyloxybenzoic acid

(DOBA).

Preferred bleach activators are those described in U.S. Patent No. 5,998,350 to Burns et al.; U.S.

Patent No. 5,698,504 to Christie et al.; U.S. Patent No. 5,695,679 to Christie et al.; U.S. Patent

No. 5,686,401 to Willey et al.; U.S. Patent No. 5,686,014 to Hartshorn et al.; U.S. Patent No.

5,405,412 to Willey et al.; U.S. Patent No. 5,405,413 to Willey et al.; U.S. Patent No. 5,130,045 to Mitchel et al.; and U.S. Patent No. 4,412,934 to Chung et al., and copending Patent

Application Serial No. 08/064,564, all of which are incorporated herein by reference.

The mole ratio of peroxygen source (as AvO) to bleach activator in the present invention generally ranges from at least 1:1, preferably from about 20:1, more preferably from about 10:1 to about 1:1, preferably to about 3:1. Quaternary substituted bleach activators may also be included. The present laundry compositions preferably comprise a quaternary substituted bleach activator (QSBA) or a quaternary substituted peracid (QSP, preferably a quaternary substituted percarboxylic acid or a quaternary substituted peroxyimidic acid); more preferably, the former. Preferred QSBA structures are further described in U.S. Patent No. 5,686,015 to Willey et al.; U.S. Patent No. 5,654,421 to Taylor et al.; U.S. Patent No. 5,460,747 to Gosselink et al.; U.S. Patent No. 5,584,888 to Miracle et al.; U.S. Patent No. 5,578,136 to Taylor et al.; all of which are incorporated herein by reference.

Highly preferred bleach activators useful herein are amide-substituted as described in U.S. Patent Nos. 5,698,504; 5,695,679; and 5,686,014, each of which are cited herein above. Preferred examples of such bleach activators include: (6-octanamidocaproyl) oxybenzenesulfonate, (6-nonanamidocaproyl)oxybenzenesulfonate, (6-decanamidocaproyl) oxybenzenesulfonate and mixtures thereof.

Other useful activators are disclosed in U.S. Patent Nos. 5,698,504; 5,695,679; and 5,686,014, each of which is cited herein above, and in U.S. Patent No. 4,966,723 to Hodge et al. These activators include benzoxazin-type activators, such as a C6H4 ring to which is fused in the 1,2- positions a moiety -C(O)OC(Rl)=N-.

Nitriles, such as acetonitriles and/or ammonium nitriles and other quaternary nitrogen containing nitriles, are another class of activators that are useful herein. Non- limiting examples of such nitrile bleach activators are described in U.S. Patent Nos. 6,133,216; 3,986,972; 6,063,750; 6,017,464; 5,958,289; 5,877,315; 5,741,437; 5,739,327; 5,004,558; and in EP Nos. 790 244, 775 127, 1 017 773, 1 017 776; and in WO 99/14302, WO 99/14296, WO96/40661, all of which are incorporated herein by reference.

Depending on the activator and precise application, good bleaching results can be obtained from bleaching systems having an in-use pH of from about 6 to about 13, and preferably from about 9.0 to about 10.5. Typically, for example, activators with electron-withdrawing moieties are used for near-neutral or sub-neutral pH ranges. Alkalis and buffering agents can be used to secure such pH. Acyl lactam activators, as described in U.S. Patent Nos. 5,698,504; 5,695,679 and 5,686,014, each of which is cited herein above, are very useful herein, especially the acyl caprolactams (see for example WO 94-28102 A) and acyl valerolactams (see U.S. Patent No. 5,503,639 to Willey et al. incorporated herein by reference).

(b) Organic Peroxides, especially Diacyl Peroxides - These are extensively illustrated in Kirk Othmer, Encyclopedia of Chemical Technology, Vol. 17, John Wiley and Sons, 1982 at pages 27-90 and especially at pages 63-72, all incorporated herein by reference. If a diacyl peroxide is used, it will preferably be one which exerts minimal adverse impact on fabric care, including color care.

(c) Metal-Containing Bleach Catalysts - The compositions and methods of the present invention can also optionally include metal-containing bleach catalysts, preferably manganese and cobalt- containing bleach catalysts.

One type of metal-containing bleach catalyst is a catalyst system comprising a transition metal cation of defined bleach catalytic activity (such as copper, iron, titanium, ruthenium tungsten, molybdenum, or manganese cations), an auxiliary metal cation having little or no bleach catalytic activity (such as zinc or aluminum cations), and a sequestrate having defined stability constants for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra (methylenephosphonic acid) and water-soluble salts thereof. Such catalysts are disclosed in U.S. Patent No. 4,430,243 to Bragg.

Manganese Metal Complexes - If desired, the compositions herein can be catalyzed by means of a manganese compound. Such compounds and levels of use are well known in the art and include, for example, the manganese-based catalysts disclosed in U.S. Patent Nos. 5,576,282; 5,246,621; 5,244,594; 5,194,416; and 5,114,606; and European Pat. App. Pub. Nos. 549,271 Al; 549,272 Al; 544,440 A2; and 544,490 Al. Preferred examples of these catalysts include

MnIV2(u-O)3(l,4,7-trimethyl-l,4,7-triazacyclononane)2(PF6)2, Mnπi2(u-O)i(u-OAc)2( 1,4,7- trimethyl-l,4,7-triazacyclononane)2(Clθ4)2, MnIV^ (u-θ)g(l,4,7-triazacyclononane)4(Clθ4)4,

MnMnIV4(u-O)i(u-OAc)2-(l,4,7-trimethyl-l,4,7-triazacyclononane)2(Clθ4)3, MnIV(l,4,7- trimethyl-l,4,7-triazacyclononane)- (OCH3)3(PFg), and mixtures thereof. Other metal-based bleach catalysts include those disclosed in U.S. Patent Nos. 4,430,243 and 5,114,611. The use of manganese with various complex ligands to enhance bleaching is also reported in the following: U.S. Patent Nos. 4,728,455; 5,284,944; 5,246,612; 5,256,779; 5,280,117; 5,274,147; 5,153,161; and 5,227,084.

Cobalt Metal Complexes - Cobalt bleach catalysts useful herein are known, and are described, for example, in U.S. Patent Nos. 5,597,936; 5,595,967; and 5,703,030; and M. L. Tobe, "Base Hydrolysis of Transition- Metal Complexes", Adv. Inorg. Bioinorg. Mech., (1983), 2, pages 1-94. The most preferred cobalt catalyst useful herein are cobalt pentaamine acetate salts having the formula [Co(NH3)5θAc] Ty, wherein "OAc" represents an acetate moiety and "Ty" is an anion, and especially cobalt pentaamine acetate chloride, [Co(NH3)5θAc]Cl2; as well as [Co(NH3)5OAc](OAc)2; [Co(NH3)5OAc](PF6)2; [Co(NH3)5OAc](SO4); [Co-

(NH3)5OAc](BF4)2; and [Co(NH3)5OAc](Nθ3)2 (herein "PAC").

These cobalt catalysts are readily prepared by known procedures, such as taught for example in U.S. Patent Nos. 6,302,921; 6,287,580; 6,140,294; 5,597,936; 5,595,967; and 5,703,030; in the Tobe article and the references cited therein; and in U.S. Patent No. 4,810,410; J. Chem. Ed. (1989), 66 (12), 1043-45; The Synthesis and Characterization of Inorganic Compounds, W.L. Jolly (Prentice-Hall; 1970), pp. 461-3; Inorg. Chem., 18, 1497-1502 (1979); Inorg. Chem., 21, 2881-2885 (1982); Inorg. Chem.. 18, 2023-2025 (1979); Inorg. Synthesis, 173-176 (1960); and Journal of Physical Chemistry. 56, 22-25 (1952).

Transition Metal Complexes of Macropolycyclic Rigid Ligands - Compositions herein may also suitably include as bleach catalyst a transition metal complex of a macropolycyclic rigid ligand. The amount used is a catalytically effective amount, suitably about 1 ppb or more, for example up to about 99.9%, more typically about 0.001 ppm or more, preferably from about 0.05 ppm to about 500 ppm (wherein "ppb" denotes parts per billion by weight and "ppm" denotes parts per million by weight). Transition-metal bleach catalysts of Macrocyclic Rigid Ligands which are suitable for use in the invention compositions can in general include known compounds where they conform with the definition herein, as well as, more preferably, any of a large number of novel compounds expressly designed for the present laundry or laundry uses, and are non-limitingly illustrated by any of the following:

Dichloro-5,12-dimethyl-l,5,8,12-tetraazabicyclo[6.6.2]hexadecane Manganese(II)

Dichloro-5,12-diethyl- 1,5,8, 12-tetraazabicyclo[6.6.2]hexadecane Manganese(II)

Diaquo-5,12-dimethyl- 1,5,8, 12-tetraazabicyclo[6.6.2]hexadecaneManganese(II)

Hexafluorophosphate Diaquo-5,12-diethyl- 1,5,8, 12-tetraazabicyclo[6.6.2]hexadecaneManganese(II)

Hexafluorophosphate

Aquo-hydroxy-5,12-dimethyl-l,5,8,12-tetraazabicyclo[6.6.2]hexadecane

Manganese(III) Hexafluorophosphate

Diaquo-5,12-dimethyl- 1,5,8, 12-tetraazabicyclo[6A2]hexadecaneManganese(II) Tetrafluoroborate

Dichloro-5,12-dimethyl-l,5,8,12 tetraazabicyclo[6.6.2]hexadecane

Manganese(III) Hexafluorophosphate

Dichloro-5,12-diethyl- 1,5,8, 12-tetraazabicyclo[6.6.2]hexadecaneManganese(III)

Hexafluorophosphate Dichloro-5,12-di-n-butyl-l,5,8,12-tetraaza bicyclo[6.6.2]hexadecane

Manganese(II)

Dichloro-5, 12-dibenzyl- 1 ,5,8, 12-tetraazabicyclo[6.6.2]hexadecaneManganese(II)

Dichloro-5-n-butyl-12-methyl-l,5,8,12-tetraaza-bicyclo[6.6.2]hexadecane

Manganese(II) Dichloro-5 -n-octyl-12-methyl- 1,5,8, 12-tetraaza-bicyclo[6.6.2]hexadecane

Manganese(II)

Dichloro-5-n-butyl-12-methyl-l,5,8,12-tetraaza-bicyclo[6.6.2]hexadecane

Manganese(II).

As a practical matter, and not by way of limitation, the compositions and methods herein can be adjusted to provide on the order of at least one part per hundred million of the active bleach catalyst species in the composition comprising a lipophilic fluid and a bleach system, and will preferably provide from about 0.01 ppm to about 25 ppm, more preferably from about 0.05 ppm to about 10 ppm, and most preferably from about 0.1 ppm to about 5 ppm, of the bleach catalyst species in the composition comprising a lipophilic fluid and a bleach system.

(d) Bleach Boosting Compounds - The compositions herein may comprise one or more bleach boosting compounds. Bleach boosting compounds provide increased bleaching effectiveness in lower temperature applications. The bleach boosters act in conjunction with conventional peroxygen bleaching sources to provide increased bleaching effectiveness. This is normally accomplished through in situ formation of an active oxygen transfer agent such as a dioxirane, an oxaziridine, or an oxaziridinium. Alternatively, preformed dioxiranes, oxaziridines and oxaziridiniums may be used.

Among suitable bleach boosting compounds for use in accordance with the present invention are cationic imines, zwitterionic imines, anionic imines and/or polyionic imines having a net charge of from about +3 to about -3, and mixtures thereof. These imine bleach boosting compounds of the present invention include those of the general structure:

Figure imgf000020_0001

[I]

where RI - R^ may be a hydrogen or an unsubstituted or substituted radical selected from the group consisting of phenyl, aryl, heterocyclic ring, alkyl and cycloalkyl radicals.

Among preferred bleach boosting compounds are zwitterionic bleach boosters, which are described in U.S. Patent Nos. 5,576,282 and 5,718,614. Other bleach boosting compounds include cationic bleach boosters described in U.S. Patent Nos. 5,360,569; 5,442,066; 5,478,357; 5,370,826; 5,482,515; 5,550,256; and WO 95/13351, WO 95/13352, and WO 95/13353. Peroxygen sources are well-known in the art and the peroxygen source employed in the present invention may comprise any of these well known sources, including peroxygen compounds as well as compounds, which under consumer use conditions, provide an effective amount of peroxygen in situ. The peroxygen source may include a hydrogen peroxide source, the in situ formation of a peracid anion through the reaction of a hydrogen peroxide source and a bleach activator, preformed peracid compounds or mixtures of suitable peroxygen sources. Of course, one of ordinary skill in the art will recognize that other sources of peroxygen may be employed without departing from the scope of the invention. The bleach boosting compounds, when present, are preferably employed in conjunction with a peroxygen source in the bleaching systems of the present invention.

(e) Preformed Peracids - Also suitable as bleaching agents are preformed peracids. The preformed peracid compound as used herein is any convenient compound which is stable and which under consumer use conditions provides an effective amount of peracid or peracid anion. The preformed peracid compound may be selected from the group consisting of percarboxylic acids and salts, percarbonic acids and salts, perimidic acids and salts, peroxymonosulfuric acids and salts, and mixtures thereof. Examples of these compounds are described in U.S. Patent No. 5,576,282 to Miracle et al.

One class of suitable organic peroxycarboxylic acids have the general formula:

O Y— R— C— O— OH wherein R is an alkylene or substituted alkylene group containing from 1 to about 22 carbon atoms or a phenylene or substituted phenylene group, and Y is hydrogen, halogen, alkyl, aryl, -C(O)OH or -C(O)OOH. Organic peroxyacids suitable for use in the present invention can contain either one or two peroxy groups and can be either aliphatic or aromatic. When the organic peroxycarboxylic acid is aliphatic, the unsubstituted peracid has the general formula:

O Y-(CH2)n-C— O— OH wherein Y can be, for example, H, CH3, CH2CI, C(O)OH, or C(O)OOH; and n is an integer from 0 to 20. When the organic peroxycarboxylic acid is aromatic, the unsubstituted peracid has the general formula:

Y-C6H4- ?C-O-OH wherein Y can be, for example, hydrogen, alkyl, alkylhalogen, halogen, C(O)OH or

C(O)OOH.

Typical monoperoxy acids useful herein include alkyl and aryl peroxyacids such as:

(i) peroxybenzoic acid and ring-substituted peroxybenzoic acid, e.g. peroxy-a- naphthoic acid, monoperoxyphthalic acid (magnesium salt hexahydrate), and o- carboxybenzamidoperoxyhexanoic acid (sodium salt);

(ii) aliphatic, substituted aliphatic and arylalkyl monoperoxy acids, e.g. peroxylauric acid, peroxystearic acid, N-nonanoylaminoperoxycaproic acid (NAPCA), N,N-(3- octylsuccinoyl)aminoperoxycaproic acid (SAPA) and N,N-phthaloylaminoperoxycaproic acid (PAP);

(iii) amidoperoxyacids, e.g. monononylamide of either peroxysuccinic acid (NAPSA) or of peroxyadipic acid (NAPAA).

Typical diperoxy acids useful herein include alkyl diperoxy acids and aryldiperoxy acids, such as: (i) 1,12-diperoxydodecanedioic acid;

(ii) 1,9-diperoxyazelaic acid;

(iii) diperoxybrassylic acid; diperoxysebacic acid and diperoxyisophthalic acid; (iv) 2-decyldiperoxybutane-l,4-dioic acid; (v) 4,4'-sulfonylbisperoxybenzoic acid.

Such bleaching agents are disclosed in U.S. Patent Nos. 4,483,781 to Hartman and 4,634,551 to Burns et al.; European Patent Application 0,133,354 to Banks et al.; and U.S. Patent No. 4,412,934 to Chung et al. Sources also include 6-nonylamino-6-oxoperoxycaproic acid as described in U.S. Patent No. 4,634,551 to Burns et al. Persulfate compounds such as for example OXONE, manufactured commercially by E.I. DuPont de Nemours of Wilmington, DE can also be employed as a suitable source of peroxymonosulfuric acid. PAP is disclosed in, for example, U.S. Patent Nos. 5,487,818; 5,310,934; 5,246,620; 5,279,757 and 5,132,431.

(f) Photobleaches - Suitable photobleaches for use in the treating compositions of the present invention include, but are not limited to, the photobleaches described in U.S. Patent Nos.

4,217,105 and 5,916,481.

(g) Enzyme Bleaching - Enzymatic systems may be used as bleaching agents. The hydrogen peroxide may also be present by adding an enzymatic system (i.e. an enzyme and a substrate therefore) which is capable of generating hydrogen peroxide at the beginning or during the washing and/or rinsing process. Such enzymatic systems are disclosed in EP Patent Application 91202655.6 filed October 9, 1991.

The present invention compositions and methods may utilize alternative bleach systems such as ozone, chlorine dioxide and the like. Bleaching with ozone may be accomplished by introducing ozone-containing gas having ozone content from about 20 to about 300 g/m3 into the solution that is to contact the fabrics. The gas:liquid ratio in the solution should be maintained from about 1:2.5 to about 1:6. U.S. Patent No. 5,346, 588 describes a process for the utilization of ozone as an alternative to conventional bleach systems and is herein incorporated by reference.

The detergent compositions of the present invention may also include any number of additional optional ingredients. These include conventional laundry detergent composition components such as non-tinting dyes, detersive builders, enzymes, enzyme stabilizers (such as propylene glycol, boric acid and/or borax), suds suppressors, soil suspending agents, soil release agents, other fabric care benefit agents, pH adjusting agents, chelating agents, smectite clays, solvents, hydrotropes and phase stabilizers, structuring agents, dye transfer inhibiting agents, opacifying agents, optical brighteners, perfumes and coloring agents. The various optional detergent composition ingredients, if present in the compositions herein, should be utilized at concentrations conventionally employed to bring about their desired contribution to the composition or the laundering operation. Frequently, the total amount of such optional detergent composition ingredients can range from about 0.01% to about 50%, more preferably from about 0.1% to about 30%, by weight of the composition. The liquid detergent compositions are in the form of an aqueous solution or uniform dispersion or suspension of surfactant, whitening agent, and certain optional other ingredients, some of which may normally be in solid form, that have been combined with the normally liquid components of the composition, such as the liquid alcohol ethoxylate nonionic, the aqueous liquid carrier, and any other normally liquid optional ingredients. Such a solution, dispersion or suspension will be acceptably phase stable and will typically have a viscosity which ranges from about 100 to 600 cps, more preferably from about 150 to 400 cps. For purposes of this invention, viscosity is measured with a Brookfield LVDV-II+ viscometer apparatus using a #21 spindle.

The liquid detergent compositions herein can be prepared by combining the components thereof in any convenient order and by mixing, e.g., agitating, the resulting component combination to form a phase stable liquid detergent composition. In a preferred process for preparing such compositions, a liquid matrix is formed containing at least a major proportion, and preferably substantially all, of the liquid components, e.g., nonionic surfactant, the non-surface active liquid carriers and other optional liquid components, with the liquid components being thoroughly admixed by imparting shear agitation to this liquid combination. For example, rapid stirring with a mechanical stirrer may usefully be employed. While shear agitation is maintained, substantially all of any anionic surfactants and the solid form ingredients can be added. Agitation of the mixture is continued, and if necessary, can be increased at this point to form a solution or a uniform dispersion of insoluble solid phase particulates within the liquid phase. After some or all of the solid-form materials have been added to this agitated mixture, particles of any enzyme material to be included, e.g., enzyme prills, are incorporated. As a variation of the composition preparation procedure hereinbefore described, one or more of the solid components may be added to the agitated mixture as a solution or slurry of particles premixed with a minor portion of one or more of the liquid components. After addition of all of the composition components, agitation of the mixture is continued for a period of time sufficient to form compositions having the requisite viscosity and phase stability characteristics. Frequently this will involve agitation for a period of from about 30 to 60 minutes.

In an alternate embodiment for forming the liquid detergent compositions, the whitening agent is first combined with one or more liquid components to form a whitening agent premix, and this whitening agent premix is added to a composition formulation containing a substantial portion, for example more than 50% by weight, more specifically, more than 70% by weight, and yet more specifically, more than 90% by weight, of the balance of components of the laundry detergent composition. For example, in the methodology described above, both the whitening agent premix and the enzyme component are added at a final stage of component additions. In a further embodiment, the whitening agent is encapsulated prior to addition to the detergent composition, the encapsulated whitening agent is suspended in a structured liquid, and the suspension is added to a composition formulation containing a substantial portion of the balance of components of the laundry detergent composition.

As noted previously, the detergent compositions may be in a solid form. Suitable solid forms include tablets and particulate forms, for example, granular particles or flakes. Various techniques for forming detergent compositions in such solid forms are well known in the art and may be used herein. In one embodiment, for example when the composition is in the form of a granular particle, the whitening agent is provided in particulate form, optionally including additional but not all components of the laundry detergent composition. The whitening agent particulate is combined with one or more additional particulates containing a balance of components of the laundry detergent composition. Further, the whitening agent, optionally including additional but not all components of the laundry detergent composition, may be provided in an encapsulated form, and the whitening agent encapsulate is combined with particulates containing a substantial balance of components of the laundry detergent composition.

The compositions of this invention, prepared as hereinbefore described, can be used to form aqueous washing solutions for use in the laundering of fabrics. Generally, an effective amount of such compositions is added to water, preferably in a conventional fabric laundering automatic washing machine, to form such aqueous laundering solutions. The aqueous washing solution so formed is then contacted, preferably under agitation, with the fabrics to be laundered therewith. An effective amount of the liquid detergent compositions herein added to water to form aqueous laundering solutions can comprise amounts sufficient to form from about 500 to 7,000 ppm of composition in aqueous washing solution. More preferably, from about 1,000 to 3,000 ppm of the detergent compositions herein will be provided in aqueous washing solution. Fabric Care Compositions / Rinse Added Fabric Softening Compositions

In another specific embodiment, the whitening agents of the present invention may be included in a fabric care composition. The fabric care composition may be comprised of at least one whitening agent and a rinse added fabric softening composition ("RAFS;" also known as rinse added fabric conditioning compositions). Examples of typical rinse added softening compositions can be found in U.S. Provisional Patent Application Serial No. 60/687582 filed on October 8, 2004. The rinse added fabric softening compositions of the present invention may comprise (a) fabric softening active and (b) a thiazolium dye. The rinse added fabric softening composition may comprise from about 1% to about 90% by weight of the FSA, more preferably from about 5% to about 50% by weight of the FSA. The whitening agent may be present in the rinse added fabric softening composition in an amount from about 0.5 ppb to about 50 ppm, more preferably from about 0.5 ppm to about 30 ppm.

In one embodiment of the invention, the fabric softening active (hereinafter "FSA") is a quaternary ammonium compound suitable for softening fabric in a rinse step. In one embodiment, the FSA is formed from a reaction product of a fatty acid and an aminoalcohol obtaining mixtures of mono-, di-, and, in one embodiment, triester compounds. In another embodiment, the FSA comprises one or more softener quaternary ammonium compounds such, but not limited to, as a monoalky quaternary ammonium compound, a diamido quaternary compound and a diester quaternary ammonium compound, or a combination thereof.

In one aspect of the invention, the FSA comprises a diester quaternary ammonium (hereinafter "DQA") compound composition. In certain embodiments of the present invention, the DQA compounds compositions also encompasses a description of diamido FSAs and FSAs with mixed amido and ester linkages as well as the aforementioned diester linkages, all herein referred to as DQA.

A first type of DQA ("DQA (I)") suitable as a FSA in the present CFSC includes a compound comprising the formula:

{R4-m " N+ - [(CH2)n - Y - R1Im) X" wherein each R substituent is either hydrogen, a short chain Cχ-Cg, preferably C1-C3 alkyl or hydroxyalkyl group, e.g., methyl (most preferred), ethyl, propyl, hydroxyethyl, and the like, poly (C2-3 alkoxy), preferably polyethoxy, group, benzyl, or mixtures thereof; each m is 2 or 3; each n is from 1 to about 4, preferably 2; each Y is -0-(O)C-, -C(O)-O-, -NR-C(O)-, or -C(O)- NR- and it is acceptable for each Y to be the same or different; the sum of carbons in each R.1, plus one when Y is -0-(O)C- or -NR-C(O) -, is C12-C22, preferably C14-C20 with each RI being a hydrocarbyl, or substituted hydrocarbyl group; it is acceptable for RI to be unsaturated or saturated and branched or linear and preferably it is linear; it is acceptable for each RI to be the same or different and preferably these are the same; and X" can be any softener-compatible anion, preferably, chloride, bromide, methylsulfate, ethylsulfate, sulfate, phosphate, and nitrate, more preferably chloride or methyl sulfate. Preferred DQA compounds are typically made by reacting alkanolamines such as MDEA (methyldiethanolamine) and TEA (triethanolamine) with fatty acids. Some materials that typically result from such reactions include N,N-di(acyl- oxyethyl)-N,N-dimethylammonium chloride or N,N-di(acyl-oxyethyl)-N,N- methylhydroxyethylammonium methylsulfate wherein the acyl group is derived from animal fats, unsaturated, and polyunsaturated, fatty acids, e.g., tallow, hardended tallow, oleic acid, and/or partially hydrogenated fatty acids, derived from vegetable oils and/or partially hydrogenated vegetable oils, such as, canola oil, safflower oil, peanut oil, sunflower oil, corn oil, soybean oil, tall oil, rice bran oil, palm oil, etc.

Non-limiting examples of suitable fatty acids are listed in US Patent No. 5,759,990 at column 4, lines 45-66. In one embodiment, the FSA comprises other actives in addition to DQA (1) or DQA. In yet another embodiment, the FSA comprises only DQA (1) or DQA and is free or essentially free of any other quaternary ammonium compounds or other actives. In yet another embodiment, the FSA comprises the precursor amine that is used to produce the DQA.

In another aspect of the invention, the FSA comprises a compound, identified as DTTMAC comprising the formula:

[R4-m " N(+) - R!m] A" wherein each m is 2 or 3, each RI is a Cg-C22> preferably Cχ4-C20> but no more than one being less than about Cχ2 and then the other is at least about 16, hydrocarbyl, or substituted hydrocarbyl substituent, preferably CχQ-C20 alkyl or alkenyl (unsaturated alkyl, including polyunsaturated alkyl, also referred to sometimes as "alkylene"), most preferably Cχ2-Cig alkyl or alkenyl, and branch or unbranched. In one embodiment, the Iodine Value (IV) of the FSA is from about 1 to 70; each R is H or a short chain Cχ-Cg, preferably C1-C3 alkyl or hydroxyalkyl group, e.g., methyl (most preferred), ethyl, propyl, hydroxyethyl, and the like, benzyl, or (Rz O)2-4.H where each R^ is a Cχ.g alkylene group; and A" is a softener compatible anion, preferably, chloride, bromide, methylsulfate, ethylsulfate, sulfate, phosphate, or nitrate; more preferably chloride or methyl sulfate.

Examples of these FSAs include dialkydimethylammonium salts and dialkylenedimethylammonium salts such as ditallowdimethylammonium and ditallowdimethylammonium methylsulfate. Examples of commercially available dialkylenedimethylammonium salts usable in the present invention are di-hydrogenated tallow dimethyl ammonium chloride and ditallowdimethyl ammonium chloride available from Degussa under the trade names Adogen® 442 and Adogen® 470 respectively. In one embodiment, the FSA comprises other actives in addition to DTTMAC. In yet another embodiment, the FSA comprises only compounds of the DTTMAC and is free or essentially free of any other quaternary ammonium compounds or other actives.

In one embodiment, the FSA comprises an FSA described in U.S. Pat. Pub. No. 2004/0204337 Al, published Oct. 14, 2004 to Corona et al., from paragraphs 30 - 79. In another embodiment, the FSA is one described in U.S. Pat. Pub. No. 2004/0229769 Al, published Nov. 18, 2005, to Smith et al., on paragraphs 26 - 31; or U.S. Pat. No. 6,494,920, at column 1, line 51 et seq. detailing an "esterquat" or a quaternized fatty acid triethanolamine ester salt.

In one embodiment, the FSA is chosen from at least one of the following: ditallowoyloxyethyl dimethyl ammonium chloride, dihydrogenated-tallowoyloxyethyl dimethyl ammonium chloride, di tallow dimethyl ammonium chloride, ditallowoyloxyethyl dimethyl ammonium methyl sulfate, dihydrogenated-tallowoyloxyethyl dimethyl ammonium chloride, dihydrogenated- tallowoyloxyethyl dimethyl ammonium chloride, or combinations thereof.

In one embodiment, the FSA may also include amide containing compound compositions. Examples of diamide comprising compounds may include but not limited to methyl- bis(tallowamidoethyl)-2-hydroxyethylammonium methyl sulfate (available from Degussa under the trade names Varisoft 110 and Varisoft 222). An example of an amide-ester containing compound is N-[3-(stearoylamino)propyl]-N-[2-(stearoyloxy)ethoxy)ethyl)]-N-methylamine. Another specific embodiment of the invention provides for a rinse added fabric softening composition further comprising a cationic starch. Cationic starches are disclosed in US 2004/0204337 Al. In one embodiment, the rinse added fabric softening composition comprises from about 0.1% to about 7% of cationic starch by weight of the fabric softening composition. In one embodiment, the cationic starch is HCP401 from National Starch.

Suitable Laundry Care Ingredients

While not essential for the purposes of the present invention, the non-limiting list of laundry care ingredients illustrated hereinafter are suitable for use in the laundry care compositions and may be desirably incorporated in certain embodiments of the invention, for example to assist or enhance performance, for treatment of the substrate to be cleaned, or to modify the aesthetics of the composition as is the case with perfumes, colorants, dyes or the like. It is understood that such ingredients are in addition to the components that were previously listed for any particular embodiment. The total amount of such adjuncts may range from about 0.1% to about 50%, or even from about 1% to about 30%, by weight of the laundry care composition.

The precise nature of these additional components, and levels of incorporation thereof, will depend on the physical form of the composition and the nature of the operation for which it is to be used. Suitable laundry care ingredients include, but are not limited to, polymers, for example cationic polymers, surfactants, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, and enzyme stabilizers, catalytic materials, bleach activators, polymeric dispersing agents, clay soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, additional perfume and perfume delivery systems, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments. In addition to the disclosure below, suitable examples of such other adjuncts and levels of use are found in U.S. Patent Nos. 5,576,282, 6,306,812 Bl and 6,326,348 Bl that are incorporated by reference.

As stated, the laundry care ingredients are not essential to Applicants' laundry care compositions. Thus, certain embodiments of Applicants' compositions do not contain one or more of the following adjuncts materials: bleach activators, surfactants, builders, chelating agents, dye transfer inhibiting agents, dispersants, enzymes, and enzyme stabilizers, catalytic metal complexes, polymeric dispersing agents, clay and soil removal/anti-redeposition agents, brighteners, suds suppressors, dyes, additional perfumes and perfume delivery systems, structure elasticizing agents, fabric softeners, carriers, hydrotropes, processing aids and/or pigments. However, when one or more adjuncts are present, such one or more adjuncts may be present as detailed below:

Surfactants - The compositions according to the present invention can comprise a surfactant or surfactant system wherein the surfactant can be selected from nonionic and/or anionic and/or cationic surfactants and/or ampholytic and/or zwitterionic and/or semi-polar nonionic surfactants. The surfactant is typically present at a level of from about 0.1%, from about 1%, or even from about 5% by weight of the cleaning compositions to about 99.9%, to about 80%, to about 35%, or even to about 30% by weight of the cleaning compositions.

Builders - The compositions of the present invention can comprise one or more detergent builders or builder systems. When present, the compositions will typically comprise at least about 1% builder, or from about 5% or 10% to about 80%, 50%, or even 30% by weight, of said builder. Builders include, but are not limited to, the alkali metal, ammonium and alkanolammonium salts of polyphosphates, alkali metal silicates, alkaline earth and alkali metal carbonates, aluminosilicate builders polycarboxylate compounds, ether hydroxypolycarboxylates, copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1,3,5-trihydroxybenzene- 2,4,6-trisulphonic acid, and carboxymethyl-oxysuccinic acid, the various alkali metal, ammonium and substituted ammonium salts of polyacetic acids such as ethylenediamine tetraacetic acid and nitrilotriacetic acid, as well as polycarboxylates such as mellitic acid, succinic acid, oxydisuccinic acid, polymaleic acid, benzene 1,3,5-tricarboxylic acid, carboxymethyloxysuccinic acid, and soluble salts thereof.

Chelating Agents - The compositions herein may also optionally contain one or more copper, iron and/or manganese chelating agents. If utilized, chelating agents will generally comprise from about 0.1% by weight of the compositions herein to about 15%, or even from about 3.0% to about 15% by weight of the compositions herein.

Dye Transfer Inhibiting Agents - The compositions of the present invention may also include one or more dye transfer inhibiting agents. Suitable polymeric dye transfer inhibiting agents include, but are not limited to, polyvinylpyrrolidone polymers, poly amine N-oxide polymers, copolymers of N-vinylpyrrolidone and N-vinylimidazole, polyvinyloxazolidones and polyvinylimidazoles or mixtures thereof. When present in the compositions herein, the dye transfer inhibiting agents are present at levels from about 0.0001%, from about 0.01%, from about 0.05% by weight of the cleaning compositions to about 10%, about 2%, or even about 1% by weight of the cleaning compositions.

Dispersants - The compositions of the present invention can also contain dispersants. Suitable water-soluble organic materials are the homo- or co-polymeric acids or their salts, in which the polycarboxylic acid may comprise at least two carboxyl radicals separated from each other by not more than two carbon atoms.

Enzymes - The compositions can comprise one or more detergent enzymes which provide cleaning performance and/or fabric care benefits. Examples of suitable enzymes include, but are not limited to, hemicellulases, peroxidases, proteases, cellulases, xylanases, lipases, phospholipases, esterases, cutinases, pectinases, keratanases, reductases, oxidases, phenoloxidases, lipoxygenases, ligninases, pullulanases, tannases, pentosanases, malanases, β- glucanases, arabinosidases, hyaluronidase, chondroitinase, laccase, and amylases, or mixtures thereof. A typical combination is a cocktail of conventional applicable enzymes like protease, lipase, cutinase and/or cellulase in conjunction with amylase.

Enzyme Stabilizers - Enzymes for use in compositions, for example, detergents can be stabilized by various techniques. The enzymes employed herein can be stabilized by the presence of water-soluble sources of calcium and/or magnesium ions in the finished compositions that provide such ions to the enzymes.

Catalytic Metal Complexes - Applicants' compositions may include catalytic metal complexes. One type of metal-containing bleach catalyst is a catalyst system comprising a transition metal cation of defined bleach catalytic activity, such as copper, iron, titanium, ruthenium, tungsten, molybdenum, or manganese cations, an auxiliary metal cation having little or no bleach catalytic activity, such as zinc or aluminum cations, and a sequestrate having defined stability constants for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra (methyl-enephosphonic acid) and water- soluble salts thereof. Such catalysts are disclosed in U.S. patent 4,430,243.

If desired, the compositions herein can be catalyzed by means of a manganese compound. Such compounds and levels of use are well known in the art and include, for example, the manganese-based catalysts disclosed in U.S. patent 5,576,282.

Cobalt bleach catalysts useful herein are known, and are described, for example, in U.S. patents 5,597,936 and 5,595,967. Such cobalt catalysts are readily prepared by known procedures, such as taught for example in U.S. patents 5,597,936, and 5,595,967.

Compositions herein may also suitably include a transition metal complex of a macropolycyclic rigid ligand - abbreviated as "MRL". As a practical matter, and not by way of limitation, the compositions and cleaning processes herein can be adjusted to provide on the order of at least one part per hundred million of the benefit agent MRL species in the aqueous washing medium, and may provide from about 0.005 ppm to about 25 ppm, from about 0.05 ppm to about 10 ppm, or even from about 0.1 ppm to about 5 ppm, of the MRL in the wash liquor.

Preferred transition-metals in the instant transition-metal bleach catalyst include manganese, iron and chromium. Preferred MRL' s herein are a special type of ultra-rigid ligand that is cross-bridged such as 5,12-diethyl-l,5,8,12-tetraazabicyclo[6.6.2]hexa-decane.

Suitable transition metal MRLs are readily prepared by known procedures, such as taught for example in WO 00/32601, and U.S. patent 6,225,464.

Examples

The following examples are provided to further illustrate the novel whitening agents of the present invention; however, they are not to be construed as limiting the invention as defined in the claims appended hereto. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in this invention without departing from the scope or spirit of the invention. All parts and percents given in these examples are by weight unless otherwise indicated. All values of the Hansen Solubility Parameter reported herein are in units of MPa05.

Sample Preparation and Test Methods

A. Sample Preparation Each sample is prepared by adding 0.5 grams of whitening agent (0.1% based on weight of the cellulosic substrate) to a solution containing 3 grams of powdered laundry detergent (AATCC powder laundry detergent) and 50OmL of room temperature water. Each colorant loading is corrected for absorbance to assure equal amount of color units. The formulation is then combined with 50 grams of cellulose powder (available from Aldrich) and the mixture is agitated for 10 minutes. The mixture is then filtered to separate the cellulose particles from the liquid, and the cellulose particles are allowed to air dry. Both the cellulose particles and the liquid are measured for color using a Gretag Macbeth Color Eye 7000A spectrophotometer, as described previously.

The cellulose particles are then placed in a container containing 500 rriL of tap water and agitated for 10 minutes. The mixture is filtered to separate the cellulose particles from the liquid, and the cellulose particles are again allowed to air dry. Both the cellulose particles and the liquid are again measured for color using the Gretag Macbeth Color Eye 7000A spectrophotometer. A Control Sample is also prepared that contained untreated cellulose particles (no whitening agent added).

The whitening agents shown in Tables IA and IB are prepared as described herein and tested for various parameters. All violet colorants are synthesized according to the procedure disclosed in US Patent No. 4,912,203 to Kluger et al. Note also that ethylene oxide, propylene oxide and butylenes oxide are shown below by their typical designation of "EO," "PO" and "BO," respectively. The average length and composition of the polymeric components of the whitening agents in Tables IA and IB is obtained from the formula: (Block 1 + Block 2 + Block 3)/(number of chains). For example, the average structure for Violet thiophene_5EO consists of a thiophene chromophore with 2 chains on the nitrogen, one equal to 3EO and one equal to 2EO. Chain caps are present on all polymeric components. Table IA - Identification of Inventive Whitening Agents

Figure imgf000034_0001
Triphenylmethane_2

Example 17 (2EO)2 (2 PO)2 OH EO 2PO

(a) EO groups are added to the terminal OH group.

Table IB - Identification of Inventive Whitening Agents

Figure imgf000035_0001

(a) EO groups are added to the terminal OH group.

B. Calculation of Whiteness: CIELab b* and Ganz and CIE Whiteness Index Whiteness Index ("WI") is a qualifying assessment of color that is calculated by a formula which includes three components of color measurement - hue, saturation, and lightness - which is then indexed to a standard white value. Several whiteness formulas can be used to measure whiteness on cellulose based substrates. Two common formulas are the Ganz Whiteness Index and CIE Whiteness. Ganz Whiteness Index is expressed by the formula: WI = (D*Y) + (P*x) + (Q*y) + C, where Y, x and y are colorimetric values and D, P, Q and C are formula parameters. CIE Whiteness is expressed by the formula: WI = Y- (800*x) - (1700*y) + 813.7, where Y, x and y are colorimetric values. Further information is available in the publication of Rolf Griesser, Ciba-Geigy Ltd, "Whiteness and Tint", June 1993.

The surface color of an article may be quantified using a series of measurements - L*, a*, and b* - generated by measuring the samples using a spectrophotometer. The equipment used for this test is a Gretag Macbeth Color Eye 7000A spectrophotometer. The software program used is "Color imatch." "L" is a measure of the amount of white or black in a sample; higher "L" values indicate a lighter colored sample. A measure of the amount of red or green in a sample is determined by "a*" values. A measure of the amount of blue or yellow in a sample is determined by "b*" values; lower (more negative) b* values indicate more blue on a sample.

Yet another measurement of the relative color of a substrate is DE CMC. DE CMC is a measure of the overall color difference for all uniform color spaces, where DE CMC represents the magnitude of difference between a color and a reference (in this case, a pure white standard). The higher the DE CMC value, the more pronounced the difference in color. In other words, smaller DE CMC values represent colors that are closer to white. The Gretag Macbeth Color Eye 7000A Spectrophotometer calculates DE CMC values based on wavelength and reflectance data for each sample.

C. Calculation of Molecular Properties The average structure of each inventive whitening agent is drawn with Material Studio molecular modeling software (available from Accelrys, Inc.). Each structure's geometry is optimized by minimizing its energy with the Forcite module using the semi-empirical Universal forcefield and the Qeq charge assignment system. The N=N bond of the diazo colorants are calculated at -1.270- 1.275 Angstroms compared to the average N=N bond distance of 1.25 Angstroms. These values are slightly shorter that those reported by Liu Jun-na et al., i.e., -1.3 angstroms, which are calculated for diphenyl diazo dyes with Gaussian 98 software package and the B3LYP/6-311G method (Liu Jun-na, Chen Zhi-rong, and Yuan Shen-feng, Journal of Zhejiang University Science, 6B(6), 2005, pp. 584-589).

After the geometry optimization of all structures, a variety of descriptors are calculated. Descriptors can be categorized in the following categories: 1. Structural, 2. Functional, 3. Energetic, 4. Topological, 5. Spatial, and 6. Thermodynamic.

All descriptors are calculated with the QSAR module of Material Studio software, except for the total number of EO groups and PO groups on the chromophore, the Hansen solubility parameter (Solubility_parameter), and the Hydrophile-Lipophile Balance number (MWJTLB). The latter two parameters are calculated with ChemSW's Molecular Modeling Pro software. Descriptors are screened as potential predictors of affinity of the whitening agent to the cellulosic substrate. Table 2 summarizes some of the test parameters that are used to characterize the whitening agents of the present invention.

Table 2 - Summary of Test Parameters

Figure imgf000037_0001
Test Results

Test 1: Whiteness Test As Determined by CIELab b* Values and the Ganz Whiteness Index

Examples 1 through 17 are tested for whiteness to determine CIELab b* values and Ganz Whiteness Index ("Ganz WI") values. Test results are provided in Table 3. Lower (more negative) CIELab b* values and higher positive Ganz WI values indicate that more blueing, or whitening effect, is exhibited by the treated cellulose particles.

Table 3 - Test Results For Whiteness as Determined by CIELab b* Values and the Ganz Whiteness Index

Figure imgf000038_0001
The test results indicate that Example 2, which contained 5 ethylene oxide repeating units, and Example 12, which contained a glycidol unit, performed the best under these test conditions. The data reveals a relatively linear correlation between CIELab b* color values and the Ganz WI values. A linear regression fit for all of the data points has a regression value of R2 = 0.988.

Test 2: Measurement of CIELab b* Values and the Dispersion Component Values of Hansen Solubility Parameter

Examples 1 through 17 are tested to determine CIELab b* values and the dispersion component values of the Hansen Solubility Parameter. Note that Examples 1 through 14 contain a violet thiophene chromophore, while Examples 15 through 17 contain triphenylmethane colorants. Examples 18 through 25 are tested to determine the dispersion component value of the Hansen Solubility Parameter only.

Test results are provided in Table 4. Larger negative CIELab b* values indicate that more blueing, or whitening effect, is exhibited by the treated cellulose particles. "N/ A" indicates that data are not available.

Table 4 - Measured CIELab b* Values and Dispersion Component Values of

Hansen Solubility Parameter

Figure imgf000039_0001
Figure imgf000040_0001

The test results reveal a relatively linear correlation between the blueing parameter, CIELab b*, and the dispersion component value of the Hansen Solubility Parameter. The color value b* decreases (i.e. blueing performance increases) linearly as δd decreases.

A linear regression fit for all of the data points and has a regression value of R2 = 0.763. The regression line has the following equation:

b_blueing = 0.9704 * δd - 22.468 (2)

Test 3: Prediction of CIELab b* Values Based on the Dispersion Component Values of Hansen Solubility Parameter

Examples 1 - 10 and 15 - 17 are first used to train a model based on the dispersion component value of the Hansen Solubility Parameter. The CIELab b* value is calculated for these Examples using Equation 3, as shown below, which utilizes the dispersion component value obtained after 1 rinse cycle:

b_blueing = 1.0014* δd - 23.02 (3)

This equation is very similar to Equation 2, which is derived using all of the Examples. The model represented by Equation 3 is validated with test compounds in Examples 11 - 14. Equation 3 is used to generate predictions for the CIELab b* value of molecules in Examples 11 - 14 (test molecules) before these molecules are synthesized and tested for whitening efficiency. The predicted CIELab b* values obtained from Equation 3 are compared to the measured values previously obtained from the Gretag Macbeth Color Eye 7000A spectrophotometer. The percent difference between measured b* color values and predicted b* color values is also determined.

Dispersion component values and predicted CIELab b* values are also determined for Comparative Examples 1 and 2. Comparative Example 1 is a blue polymeric anthraquinone dye disclosed in Example III of USPN 4,127,243 to Farmer. Comparative Example 2 is Basic Violet 3, as disclosed in Table 2 of US Patent Application Publication No. 2005/0288206 to Sadlowski et al.

Test results are provided in Table 5 and Figure 1. "N/ A" indicates that data are not available.

Table 5 - Predicted CIELab b* Values Based on Dispersion Component Values of Hansen Solubility Parameter After Post Rinse 1

Figure imgf000041_0001

Figure imgf000042_0001

Example 11 (Violet thiophene_5EO_COCH3) and Example 12 (Violet thiophene_glycidol) are synthesized and tested to verify that the model can explain the effects of the functionality of the polymeric chain end caps. Example 12 has four hydroxyl groups, while whitening agents with EO or PO end groups have only 2 hydroxyl groups. Example 11 has roughly the same size as Example 12, but the acetate caps are less polar than the OH groups.

Figure 1 provides a graphical representation of the data. The phrase "violet thiophene" is shown as "violet" and "triphenylmethane" is shown as "TPM" on Figure 1. The data points represent the measured CIELab b* color values. The solid line represents Equation 3, which is the predicted data. The linear correlation between color value b* and δd suggests that the smaller the molecule the stronger the deposition on the cellulose powder. The size of the whitening agent compound may influence its ability to access and diffuse into the pores of the cellulose powder. In addition, whitening agents having a more polar cap on the chains of the molecule, or those whitening agents having a greater number of polar end groups, exhibited greater blueing efficacy. The calculations also show that triphenylmethane-containing whitening agents are preferred whitening agents.

Exemplary Detergent Formulations Formulations Ia - 11: Liquid Detergent Formulations

Tables 6A and 6B provide examples of liquid detergent formulations which include at least one whitening agent of the present invention. The formulations are shown in Table 6A as Formulations Ia through If and in Table 6B as Formulations Ig through 11.

Table 6A - Li uid Deter ent Formulations Com risin the Inventive Whitenin A ent

Figure imgf000043_0001
Table 6B - Liquid Detergent Formulations Comprising the Inventive Whitening Agent

Figure imgf000044_0001

Footnotes for Formulations Ia-I:

1 diethylenetriaminepentaacetic acid, sodium salt

2 diethylenetriaminepentakismethylenephosphonic acid, sodium salt

3 ethylenediaminetetraacetic acid, sodium salt

4 a non-tinting dyes used to adjust formula color compact formula, packaged as a unitized dose in polyvinyl alcohol film 6 alkoxylated anthraquinone colorant with hueing efficiency >10 and wash removability 30-85% 7 alkoxylated thiophene colorant with hueing efficiency >10 and wash removability 30-85% alkoxylated triphenylmethane colorant with hueing efficiency >10 and wash removability 30- 85% 9 Acusol OP301

Formulations 2a - 2e: Granular Detergent Formulations

Table 7 provides examples of granular detergent formulations which include at least one whitening agent of the present invention. The formulations are shown in Table 7 as Formulations 2a through 2e.

Table 7 - Granular Detergent Formulations Comprising the Inventive Whitening Agent

Figure imgf000045_0001
Exemplary Fabric Care Compositions Formulations 3a - 3d: Liquid Fabric Care Compositions

Table 8 provides examples of liquid fabric care compositions which include at least one whitening agent of the present invention. The compositions are shown in Table 8 as Formulations 3a through 3d.

Table 8 - Liquid Fabric Care Compositions Comprising the Inventive Whitening Agent

Figure imgf000046_0001
a N,N-di(tallowoyloxyethyl)-N,N-dimethylammonium chloride. b Cationic starch based on common maize starch or potato starch, containing 25% to 95% amylose and a degree of substitution of from 0.02 to 0.09, and having a viscosity measured as

Water Fluidity having a value from 50 to 84. c Copolymer of ethylene oxide and terephthalate having the formula described in US 5,574,179 at col.15, lines 1-5, wherein each X is methyl, each n is 40, u is 4, each R1 is essentially 1,4- phenylene moieties, each R2 is essentially ethylene, 1 ,2-propylene moieties, or mixtures thereof. d Diethylenetriaminepentaacetic acid. e KATHON® CG available from Rohm and Haas Co. f Silicone antifoam agent available from Dow Corning Corp. under the trade name DC2310. s Disodium 4,4'-bis-(2-sulfostyryl) biphenyl, available from Ciba Specialty Chemicals. h Cocomethyl ethoxylated [15] ammonium chloride, available from Akzo Nobel. Accordingly, the present invention provides a whitening agent for cellulosic substrates comprising at least one chromophore component that comprises a thiophene or triphenylmethane colorant and at least one polymeric component; wherein the whitening agent possesses a dispersion component value of the Hansen Solubility Parameter of less than or equal to about 17 MPa05. A laundry detergent containing such a whitening agent is also contemplated herein.

The whitening agent of the present invention includes a whitening agent for cellulosic substrates comprising at least one chromophore component that comprises a thiophene colorant and at least one polymeric component wherein the whitening agent is characterized by the following structure:

Figure imgf000047_0001

Wherein Ri and R2 can independently be selected from: a) [(CH2CR'HO)x(CH2CR"HO)yH] wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 5; wherein y > 1; and wherein z = 0 to 5 ; b) Ri = alkyl, aryl or aryl alkyl and R2 = [(CH2CR'HO)x(CH2CR"HO)yH] wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)2H, and mixtures thereof; wherein x + y < 10; wherein y > 1; and wherein z = 0 to 5; c) Ri = [CH2CH2(OR3)CH2OR4] and R2 = [CH2CH2(O R3)CH2O R4] wherein R3 is selected from the group consisting of H, (CH2CH2O)ZH, and mixtures thereof; and wherein z = 0 to 10; wherein R4 is selected from the group consisting of (Ci-Ci6)alkyl , aryl groups, and mixtures thereof; and d) wherein Rl and R2 can independently be selected from the amino addition product of styrene oxide, glycidyl methyl ether, isobutyl glycidyl ether, isopropylglycidyl ether, t- butyl glycidyl ether, 2-ethylhexylgycidyl ether, and glycidylhexadecyl ether, followed by the addition of from 1 to 10 alkylene oxide units.

A potentially preferred whitening agent of the present invention includes a whitening agent for cellulosic substrates comprising at least one chromophore component that comprises a thiophene colorant and at least one polymeric component wherein the whitening agent is characterized by the following structure:

Figure imgf000048_0001

wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 5; wherein y > 1; and wherein z = 0 to 5.

Additionally, the present invention provides a whitening agent characterized by a CIELab b* color value ("b") and a dispersion component value of the Hansen Solubility Parameter ("δd"). wherein "b" and "δd" exhibit an approximately linear correlation with each other according to the following equation: b = l.OO(δd) - 23. A laundry detergent containing such a whitening agent is also contemplated herein.

Thus, it is believed to be an advantage of the present invention to employ the predictive model to aid in the selection of chromophore-containing compounds ideally suited as whitening agents.

Test results provided herein tend to indicate that deposition of the whitening agent on the cellulose powder may be controlled, at least in part, by the size of the whitening agent compound and by its chain cap functionality. Test results also suggest that larger molecules may be too bulky to diffuse into the pores of the cellulose powder which may decrease the whitening effect after multiple washing and/or rinsing cycles.

While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.

Claims

CLAIMSWhat is claimed is:
1. A laundry care composition comprising a laundry care ingredient and a whitening agent, said whitening agent comprising:
(a) at least one chromophore component that comprises a thiophene colorant, and
(b) at least one polymeric component; wherein the whitening agent is characterized by the following structure:
Figure imgf000050_0001
Wherein Ri and R2 can independently be selected from: a) [(CH2CR1HO)X(CH2CR11HO)XH] wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 5; wherein y > 1; and wherein z = 0 to 5; b) Ri = alkyl, aryl or aryl alkyl and R2 = [(CH2CR1HO)X(CH2CR11HO)5H] wherein R' is selected from the group consisting of H, CH3, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 10; wherein y > 1; and wherein z = 0 to 5; c) Ri = [CH2CH2(OR3)CH2OR4] and R2 = [CH2CH2(O R3)CH2O R4] wherein R3 is selected from the group consisting of H, (CH2CH2θ)zH, and mixtures thereof; and wherein z = 0 to 10; wherein R4 is selected from the group consisting of (Ci-Ci6)alkyl , aryl groups, and mixtures thereof; and d) wherein Rl and R2 can independently be selected from the amino addition product of styrene oxide, glycidyl methyl ether, isobutyl glycidyl ether, isopropylglycidyl ether, t- butyl glycidyl ether, 2-ethylhexylgycidyl ether, and glycidylhexadecyl ether, followed by the addition of from 1 to 10 alkylene oxide units.
2. The laundry care composition of claim 1, wherein the whitening agent comprises a polyoxy alkylene chain having from 2 to 20 repeating units.
3. A laundry care composition according to any preceding claim, wherein the whitening agent comprises at least two hydroxyl groups, preferably said least two hydroxyl groups are primary hydroxyl moieties.
4. A laundry care composition according to any preceding claim, wherein the whitening agent comprises an alkoxylated thiophene polymeric colorant.
5. A laundry care composition according to any preceding claim, wherein the whitening agent possesses a dispersion component value of the Hansen Solubility Parameter of less than or equal to 17 MPa0 5, preferably from 12 to 17 MPa0 5.
6. The laundry care composition of any of claims 1 to 4, wherein the whitening agent's chromophore exhibits an absorbance spectrum in water of from 520 nanometers to 640 nanometers.
7. The laundry care composition of any of claims 1 to 4, wherein the whitening agent's chromophore exhibits an emission spectrum in water of from 400 nanometers to 480 nanometers.
8. A laundry care composition comprising a laundry care ingredient and a whitening agent, said whitening agent comprising: (a) at least one chromophore component that comprises a thiophene or triphenylmethane colorant, and
(b) at least one polymeric component; wherein the whitening agent possesses a dispersion component value of the Hansen Solubility Parameter of less than or equal to 17 MPa0 5, preferably from 12 to 17 MPa05.
9. The laundry care composition of claim 8, wherein the whitening agent comprises a polyoxyalkylene chain having from 2 to 20 repeating units.
10. A laundry care composition according to any preceding claim, wherein the whitening agent comprises at least two hydroxyl groups, preferably said least two hydroxyl groups are primary hydroxyl moieties.
11. A laundry care composition according to any preceding claim, wherein the whitening agent comprises an alkoxylated triphenylmethane polymeric colorant.
12. A laundry care composition according to any preceding claim, wherein the whitening agent comprises an alkoxylated thiophene polymeric colorant.
13. A laundry care composition according to any of claims 8 to 12, wherein the whitening agent's chromophore exhibits an absorbance spectrum in water of from 520 nanometers to 640 nanometers.
14. A laundry care composition according to any of claims 8 to 12, wherein the whitening agent's chromophore exhibits an emission spectrum in water of from 400 nanometers to 480 nanometers.
15. A laundry care composition comprising a laundry care ingredient and a whitening agent, said whitening agent comprising:
(a) at least one chromophore component that comprises a thiophene colorant, and
(b) at least one polymeric component; wherein the whitening agent is characterized by the following structure:
Figure imgf000053_0001
wherein R' is selected from the group consisting of H, CH3, CH2θ(CH2CH2θ)zH, and mixtures thereof; wherein R" is selected from the group consisting of H, CH2O(CH2CH2O)ZH, and mixtures thereof; wherein x + y < 5; wherein y > 1; and wherein z = 0 to 5.
16. The laundry care composition of claim 15, wherein the whitening agent comprises a polyoxyalkylene chain having from 2 to 20 repeating units, preferably from 4 to 6 repeating units.
PCT/IB2007/050192 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agent for cellulosic substrates WO2008087497A1 (en)

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Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
ES10155140T ES2386873T3 (en) 2007-01-19 2007-01-19 Care composition on laundry comprising a whitening agent for cellulosic substrates
MX2009007746A MX2009007746A (en) 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agent for cellulosic substrates.
CA 2673239 CA2673239C (en) 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agent having an azo-thiophene or triphenylmethane colorant moiety and a polyoxyalkylene moiety
EP20070700644 EP2104729B1 (en) 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agent for cellulosic substrates
EP10155140A EP2192169B1 (en) 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agents for cellulosic substrates
CN 200780049971 CN101583704B (en) 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agent for cellulosic substrates
JP2009545246A JP5122583B2 (en) 2007-01-19 2007-01-19 Laundry care compositions comprising a cellulose substrate for brightener
DE200760010350 DE602007010350D1 (en) 2007-01-19 2007-01-19 Laundry care products with whiteners for cellulosic substrates
BRPI0720944A BRPI0720944B1 (en) 2007-01-19 2007-01-19 composition for treating the clothes washing comprising a bleaching agent for cellulosic substrates
PCT/IB2007/050192 WO2008087497A1 (en) 2007-01-19 2007-01-19 Laundry care composition comprising a whitening agent for cellulosic substrates
ES07700644T ES2355763T3 (en) 2007-01-19 2007-01-19 Care composition on laundry comprising a whitening agent for cellulosic substrates.
AT10155140T AT557080T (en) 2007-01-19 2007-01-19 Laundry care composition with bleach for cellulosic substrates
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DE602007010350D1 (en) 2010-12-16
ES2386873T3 (en) 2012-09-04

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