GB2360792A - Laundry treatment composition containing a rebuild agent - Google Patents

Abstract

A laundry treatment composition comprises a water-soluble or water-dispersible rebuild agent for deposition onto a fabric during a treatment process wherein the material undergoes during the treatment process, a chemical change by which change the affinity of the material for the fabric is increased; and a cellulose-crosslinking and/or reactive polymer. The rebuild agent has a polymeric backbone, eg. cellulose or another polysaccharide, and ester-linked pendant groups.

Description

Laundry <U>Treatment Compositions</U> <U>Technical Field</U> The present invention relates to laundry treatment compositions.

<U>Background of the Invention</U> Alternating cycles or using and laundering textile items results in adverse affects on the appearance of the item. Laundering is necessary to remove the stains and soils that accumulate on textiles during use. However, the laundering process itself tends to accelerate or cause the degradation of the appearance of the items. This is caused by many reasons, including dye loss from the fabric, redeposition of fugitive dyes onto other garments in the wash, abrasion of the fabric surface leading to fuzzing and/or pilling, loss of garment shape and/or garment shrinkage and/or thinning of the fabric, and wrinkling. All of these affects combined lead to an overall worn or faded appearance of the garments. The present inventors have set out to provide a laundry treatment composition which can overcome some or a11 of these problems.

In laundry cleaning or treatment products, it is essential for some ingredients to be deposited onto and adhere to the fabric for them to deliver their beneficial effects.

Typical examples are fabric conditioners or softeners. Nevertheless, the benefits conferred by such conventional materials do not include rebuilding the fabric. It has now been found possible to include in laundry products, agents which deposit cellulose or cellulose-like materials onto the fabric to at least partially replace the lost material of the fibre. WO-A-99/14245 discloses laundry detergent compositions containing cellulosic based polymers to provide appearance and integrity benefits to fabrics. These polymers are cellulosic polymers in which the saccharide rings have pendant oxygen atoms to which substituents `R' are bonded, i.e. they are attached to the rings via an ether linkage. The groups 'R' can be hydrogen, lower alkyl or alkylene linkages terminated by carboxylic acid, ester or amide groups. Optionally, up to five alkyleneoxy groups may be interspersed between the groups are the respective oxygen atom. At least some of these groups may undergo a chemical change such as hydrolysis, in the wash liquor. However no such change would result in an increased affinity for the fabric. On the contrary, because the "ester" group is configured with the carbonyl group closer to the polysaccharide than the oxygen atom (i.e. esters of carboxyalkyl groups), any hydrolysis will result in free acid substituents which will actually result in an increase in solubility and therefore, a decrease in affinity for the fabric.

WO-A-99/14295 discloses structures analogous to those described in WO-A-99/14245 but in one alternative, the substituents `R' together with the oxygen on the saccharide ring, constitute pendant half-esters of certain dicarboxylic acids. A single example of such a material is given. The dicarboxylic acid half-esters would tend to hydrolyse in the wash liquor and thereby increase affinity of the material for a cotton fabric. However, first, this mechanism of action or behaviour is not mentioned. Second, the hydrolysis rate of such dicarboxylic acids half esters is not as great as that of esters of monocarboxylic acids (which are not disclosed or claimed in WO-A-99/14295). Third, the degree of substitution for this variant is specified as being from 0.001 to 0.1. This is so low as to make the enhancement of fabric affinity too low to be worthwhile for this mechanism of action. Fourth, the structures described and claimed insofar as they have such half ester substituents, must also have substituents of the type which are carboxyalkyl groups or esters thereof, i.e. of the type also described in WO-A-99/14245. In the latter (ester) case, these would hydrolyse to the free acid form. The degree of substitution of the latter (0.2 to 2) is considerably higher than for the half-ester groups and the resultant increase in solubility would easily negate any enhanced affinity for the fabric by hydrolysis of the half- ester groups.

Our copending patent application no. PCT/EP99/07422 describes laundry treatment compositions comprising a water- soluble or water dispersible rebuild agent for deposition onto a fabric during a treatment process, wherein the rebuild agent undergoes during the treatment process a chemical change by which the affinity of the rebuild agent for the fabric is increased, the chemical change resulting in the loss or modification of one or more groups covalently bonded to be pendant to a polymeric backbone of the rebuild agent. According to one embodiment, the groups are covalently bonded to the polymeric backbone by an ester linkage, the ester-linked groups being selected from monocarboxylic acid esters. In a further embodiment, the backbone comprises cellulose units or other P-1, 4-linked polysaccharide units, the average degree of substitution of the total of all groups pendant on the saccharide rings of the backbone being from 0.3-3, preferably 0.4-1 more preferably from 0.5-0.75, most preferably from 0.6-0.7.

A different approach to fabric damage during washing is to employ fibre-reactive polymers. Fibre-reactive polymers are described in WO 98/29530, where it is claimed that the polymers impart overall improved appearance to fabrics, including reduced pill/fuzz and anti-fading. Similar compositions are taught in WO 97/42287. US 5571286 discloses certain polymers and pre-polymers derived from polyoxyalkylene amines and their use in a process for shrink proofing wool.

The present inventors have realised that fibre-reactive polymers and fabric rebuild polymers can be advantageously combined in a laundry treatment composition. Surprisingly, the benefits of the two different types of polymer are retained even in the presence of the other polymer.

Our copending application no. GB 99239212.2 discloses a fabric care composition comprising a polymeric material which is capable of self cross-linking and/or reacting with cellulose together with one or more textile compatible carriers, wherein the polymeric material comprises one or more poly (oxyalkylene) groups having an end group which comprises one or more amino groups or derivatives of said amino groups is disclosed in our copending application no. GB 9923279.5 discloses fabric care compositions adapted for use in a laundering process comprising at least one cationic polymer which is an amine- or amide- epichlorohydrin resin or derivative thereof, at least one anionic polymer and at least one textile compatible carrier, wherein the cationic polymer and the anionic polymer are present in amounts such that the overall charge provided by the polymers is positive.

Our copending application no. GB 9820206.2 discloses the use of a fabric care composition comprising at least one amine- or amide- epichlorohydrin resin or derivative thereof and at least one textile compatible carrier, wherein the textile compatible carrier facilitates contact between the resin and the fabric in a laundering process to improve fabric dimensional stability of fabric comprising cellulosic fibres.

The combined fabric rebuild and fibre-reactive polymers are found to provide the following advantages: Reduced thinning of fabric. Improved surface colour definition. Pill and/or fuzz resistance. Improved dimensional stability. Reduced wrinkling.

<U>Definition of the Invention</U> The present invention provides a laundry treatment composition comprising (a) a water-soluble or water-dispersible rebuild agent for deposition onto a fabric during a treatment process wherein the rebuild agent undergoes during the treatment process, a chemical change by which change the affinity of the rebuild agent for the fabric is increased, said chemical change resulting in the loss or modification of one or more groups covalently bonded to be pendant to a polymeric backbone of the rebuild agent via an ester linkage, the ester-linked group (s) being selected from monocarboxylic acid esters, and (b) a polymeric material which is capable of cross- linking and/or reacting with cellulose, wherein the polymeric material is selected from the group consisting of polymeric material comprising one or more poly (oxyalkylene) groups having an end group which comprises one or more amino groups or derivatives of said amino groups, and cationic polymers which are amine- or amide- epichlorohydrin resins or derivatives thereof.

In compositions according to the first aspect of the invention, the polymeric backbone of the rebuild agent preferably comprises cellulose units or other f-1,4 linked polysaccharide units. Moreover, the average degree of substitution of a11 pendant group(s), i.e. all the group (s) which undergo the chemical change plus any other groups per saccharide rings for the totality of saccharide rings in the rebuild agent is preferably from 0.3 to 3, more preferably from 0.4 to 1, still more preferably from 0.5 to 0.75 and most preferably from 0.6 to 0.7.

Throughout this specification, "average degree of substitution" refers to the number of substituted pendant groups per saccharide ring, averaged over all saccharide rings of the rebuild agent. Each saccharide ring prior to substitution has three -OH groups and therefore, an average degree of substitution of 3 means that each of these groups on all molecules of the sample, bears a substituent.

By ester linkage is meant that the hydrogen of an -OH group has been replaced by a substituent such as R'-CO-, R'S02- etc to form a carboxylic acid ester, sulphonic acid ester (as appropriate) etc together with the remnant oxygen attached to the saccharide ring. In some cases, the group R' may for example contain a heteroatom, e. g. as an -NH- group, attached to the carbonyl, sulphonyl etc group, so that the linkage as a whole could be regarded as a urethane etc linkage. However, the term ester linkage is still to be construed as encompassing these structures. The compositions according to the second aspect are not limited to those incorporating rebuild agents incorporating monocarboxylic acid ester linkages. According to a second aspect of the present invention, there is provided a laundry treatment composition comprising: (a) a water-soluble or water- dispersible rebuild agent for deposition onto a fabric during a treatment process wherein the rebuild agent undergoes during the treatment process, a chemical change by which change the affinity of the rebuild agent for the fabric is increased, the chemical change occurring in or to a group or groups covalently bonded to be pendant on a polymeric backbone of the rebuild agent and which backbone comprises cellulose units or other a-1,4 linked polysaccharide units, the average degree of substitution of the total of all groups pendant on the saccharide rings of the backbone being from 0.3 to 3, preferably from 0.4 to 1, more preferably from 0.5 to 0.75, most preferably from 0.6 to 0.7, and (b) a polymeric material which is capable of cross- linking and/or reacting with cellulose, wherein the polymeric material is selected from the group consisting of polymeric material comprising one or more poly (oxyalkylene) groups having an end group which comprises one or more amino groups or derivatives of said amino groups, and cationic polymers which are amine- or amide- epichlorohydrin resins or derivatives thereof.

Optionally, compositions may embody both the first and second aspects of the inventions, simultaneously. The exact mechanism by which the rebuild agents exert their effect is not fully understood. Whether or not they can repair thinned or damaged fibres is not known. However, they are capable of replacing lost fibre weight with deposited and/or bonded material, usually of cellulosic type. This can provide one or more advantages such as repair or rebuilding of the fabric, strengthening of the textile or giving it enhanced body or smoothness, reducing its transparency, reducing fading of colours, improving the appearance of the fabric or of individual fibres, improved comfort during garment wear, dye transfer inhibition, increased stiffness, anti-wrinkle, effect and ease of ironing.

In the case of those rebuild agents having a cellulose backbone and pendant ester groups, without being bound by any particular theory or explanation, the inventors have conjectured that the mechanism of deposition is as follows. Cellulose is substantially insoluble in water. Attachment of the ester groups causes disruption of the hydrogen bonding between rings of the cellulose chain, thus increasing water solubility or dispersibility. In the treatment liquor, it is believed that the ester groups are hydrolysed, causing the affinity for the fabric to increase and the polymer to be deposited on the fabric. <U>Detailed Description of the Invention.</U> <U>The Rebuild Agent</U> The rebuild agent material used in the present invention is water-soluble or water-dispersible in nature and in a preferred form comprises a polymeric backbone having one or more pendant groups which undergo the chemical change to cause an increase in affinity for fabric.

The weight average molecular weight (M,,) of the rebuild agent (as determined by GPC) may typically be in the range of 500 to 2,000,000 for example 1,000 to 1,500,000. Preferably though, it is from 1,000 to 100,000, more preferably from 5,000 to 50,000, especially from 10,000 to 15,000.

By water-soluble, as used herein, what is meant is that the material forms an isotropic solution on addition to water or another aqueous solution.

By water- dispersible, as used herein, what is meant is that the material forms a finely divided suspension on addition to water or another aqueous solution. Preferably though, the term "water-dispersible" means that the material, in water at pH 7 and at 25 C, produces a solution or a dispersion having long-term stability.

By an increase in the affinity of the material for the fabric upon a chemical change, what is meant is that at some time during the treatment process, the amount of material that has been deposited is greater when the chemical change is occurring or has occurred, compared to when the chemical change has not occurred and is not occurring, or is occurring more slowly, the comparison being made with all conditions being equal except for that change in the conditions which is necessary to affect the rate of chemical change.

Deposition includes adsorption, cocrystallisation, entrapment and/or adhesion.

<U>The Polymeric Backbone</U> For the first aspect of the invention, it is especially preferred that the polymeric backbone is of a similar chemical structure to that of at least some of the fibres of the fabric onto which it is to be deposited.

For example, if the fabric is cellulosic in nature, e.g. cotton, the polymeric backbone is preferably cellulose or a cellulose derivative or a another (3-1,4-linked polysaccharide having an affinity for cellulose, such as mannan and glucomannan. This is essential in the case of the second aspect of the invention. The average degree of substitution on the polysaccharide of the pendant groups which undergo the chemical change (plus any non-functional pendant groups which may be present) is preferably (for compositions according to the first aspect of the invention) or essential (for compositions according to the second aspect of the invention) from 0.3 to 3, more preferably from 0.4 to 1. Still more preferred is a degree of substitution of from 0.5 to 0.75 and yet more preferred is 0.6-0.7. The polysaccharide may be straight or branched. Many naturally occurring polysaccharides have at least some degree of branching, or at any rate, at least some saccharide rings are in the form of pendant side groups (and therefore are not in themselves counted in the degree of substitution) on a main polysaccharide backbone.

A polysaccharide comprises a plurality of saccharide rings which have pendant hydroxyl groups. The pendant groups can be bonded chemically or by other bonding mechanism, to these hydroxyl groups by any means described hereinbelow. The "average degree of substitution" means the average number of pendant groups per saccharide ring for the totality of polysaccharide molecules in the sample and is determined for all saccharide rings whether they form part of a linear backbone or are themselves, pendant side groups in the polysaccharide.

Other polymeric backbones suitable as according to the present invention include those described in Hydrocolloid Applications, A. Nussinswitch, Blackie 1997.

<U>Pendant Groups which undergo the Chemical Change</U> In the case of the first aspect of the invention, the chemical change which causes the increased fabric affinity will usually be hydrolysis. In the case of the second aspect of the invention it is preferably lysis, for example hydrolysis or, perhydrolysis or else it is preferably bond- cleavage, optionally catalysed by an enzyme or another catalyst. Hydrolysis of ester-linked groups is most typical. However, preferably this change is not merely protonation or deprotonation, i.e. a pH induced effect. The chemical change occurs in or to a group covalently bonded to a polymeric backbone, especially, the loss of one or more such groups. These group (s) is/are pendant on the backbone. In the case of the first aspect of the invention these are ester-linked groups based on monocarboxylic acids. Preferred for use in the first aspect of the invention are cellulosic polymers of formula (I):-

wherein at least one or more R groups of the polymer are independently selected from groups of formulae:-

wherein each R1 is independently selected from C1-20 (preferably C1_6) alkyl, C2_20 (preferably C2_6) alkenyl (e.g. vinyl) and CS_, aryl (e.g. phenyl) any of which is optionally substituted by one or more substituents independently selected from C1_4 alkyl, C1_12 (preferably C1-4) alkoxy, hydroxyl, vinyl and phenyl groups; and each RZ is independently hydrogen or a group R1 as hereinbefore defined.

The second aspect of the invention is not limited to (but may include) use of rebuild agents incorporating ester linkages based on monocarboxylic acids. Mono-, di- and polycarboxylic ester- or semi-ester- linkages, ester and semi-ester linkages derived from non-carboxylic acids, as well as carbamate, urea or silyl linked groups, as well as others, are also possible.

However, preferred for use in the second aspect of the invention are cellulosic polymers of formula (II) :-

wherein at least one or more R groups of the polymer are independently selected from groups of formulae:-

wherein each R1 is independently selected from Cl-20 (preferably C1_6) alkyl, Cz_zo (preferably C2_6) alkenyl (e.g. vinyl) and CS_, aryl (e.g. phenyl) any of which is optionally substituted by one or more substituents independently selected from C1_4 alkyl, C1_12 (preferably C1_4) alkoxy, hydroxyl, vinyl and phenyl groups; each R2 is independently selected from hydrogen and groups R1 as hereinbefore defined; R3 is a bond or is selected from C1_4 alkylene, C2_4 alkenylene and CS_7 arylene (e.g. phenylene) groups, the carbon atoms in any of these being optionally substituted by one or more substituents independently selected from C1_12 (preferably Cl_ 4) alkoxy, vinyl, hydroxyl, halo and amine groups; each R4 is independently selected from hydrogen, counter cations such as alkali metal (preferably Na) or 2Ca or zMg, and groups R1 as hereinbefore defined; wherein each RS is independently selected from the group consisting of H, Cl-C20 alkyl, CS-C7 cycloalkyl, C7-C20 arylalkyl, C7-C20 alkylaryl, substituted alkyl, hydroxyalkyl, (R6) 2N-alkyl, and (R6) 3N-alkyl, where R6 is independently selected from the group consisting of H, Cl-C20 alkyl, CS-C7 cycloalkyl, C7-C20 arylalkyl, C7-C20 alkylaryl, aminoalkyl, alkylaminoalkyl, dial kylaminoalkyl, piperidinoalkyl, morpholinoalkyl, cycloaminoalkyl and hydroxyalkyl; groups R which together with the oxygen atom forming the linkage to the respective saccharide ring forms an ester or hemi-ester group of a tricarboxylic- or higher polycarboxylic- or other complex acid such as citric acid, an amino acid, a synthetic amino acid analogue or a protein. For the avoidance of doubt, as already mentioned, in both formula (I) and formula (II) some of the R groups may optionally have one or more structures, for example as hcreinbefore described. For example, one or more R groups may simply be hydrogen or an alkyl group.

In the case of formula (II), some preferred R groups may be independently selected from one or more of methane sulphonate, toluene, sulphonate, groups and hemiester groups of fumaric, malonic, itaconic, oxalic, malefic, succinic, tartaric, glutamic, aspartic and malic acids.

In the case of formula (I) and formula (II), they may be independently selected from one or more of acetate, propanoate, trifluroacetate, 2-(2-hydroxy-l-oxopropoxy) propanoate, lactate, glycolate, pyruvate, crotonate, isovalerate, cinnamate, formate, salicylate, carbamate, methylcarbamate, benzoate and gluconate groups.

Particularly preferred are cellulose monoacetate, cellulose hemisuccinate, and cellulose 2-(2-hydroxy-1- oxopropoxy)propanoate. The term cellulose monoacetate is used herein to denote those acetates with the degree of substitution of 1 or less.

<U>Other Pendant Groups</U> As mentioned above, preferred (for the first aspect of the invention) or essential (for the second aspect of the invention) are degrees of substitution for the totality of all pendant substituents in the following order of increasing preference: from 0.3 to 3, from 0.4 to 1, from 0.5 to 0.75, from 0.6 to '0.7. However, as well as the groups which undergo the chemical change, pendant groups of other types may optionally be present, i.e. groups which do not undergo a chemical change to enhance fabric affinity. Within that class of other groups is the subclass of groups for enhancing the solubility of the rebuild agent (e.g. groups which are, or contain one or more free carboxylic acid/salt and/or sulphonic acid/salt and/or sulphate groups).

Examples of solubility enhancing substituents include carboxyl, sulphonyl, hydroxyl, (poly) ethyl eneoxy-and/or (poly)propyleneoxy-containing groups, as well as amine groups.

The other pendant groups preferably constitute from 0% to 65%, more preferably from 0% to<B>10%</B> (e.g. from 0% to 5%) of the total number of pendant groups. The minimum number of other pendant groups may, for example be 0.1% or 1 % of the total. The water- solubilising groups could comprise from 0% to<B>100%</B> of those other groups but preferably from 0% to 20%, more preferably from 0 % to 10%, still more preferably from 0 % to 5 % of the total number of other pendant groups. <U>Synthetic Routes</U> Those rebuild agents according to the present invention which are not commercially available may be prepared by a number of different synthetic routes, for example:- (1) polymerisation of suitable monomers, for example, enzymatic polymerisation of saccharides, e.g. per S. Shoda, & S. Kobayashi, Makromol. Symp. 1995, 99, 179-184 or oligosaccharide synthesis by orthogonal glycosylation e.g. per H. Paulsen, Angew. Chem. Int. Ed. Engl. 1995, 34, 1432- 1434.; (2) derivatisation of a polymeric backbone (either naturally occurring, especially polysaccharides, especially beta-1,4- linked polysaccharides, especially cellulose, mannan, glucomannan, galactomannan, xyloglucan; or synthetic polymers) up to the required degree of substitution with functional groups which improve the solubility of the polymer using a reagent (especially acid halides, especially carboxylic acid halides, anhydrides, carboxylic acid anhydrides, carboxylic acids or, carbonates) in a solvent which either dissolves the backbone, swells the backbone, or does not swell the backbone but dissolves or swells the product; (3) hydrolysis of polymer derivatives (especially esters) down to the required degree of substitution; or (4) a combination of any two or more of routes (1) - (3) . The degree and pattern of substitution from routes (1) or (2) may be subsequently altered by partial removal of functional groups by hydrolysis or solvolysis or other cleavage. Relative amounts of reactants and reaction times can also be used to control the degree of substitution. In addition, or alternatively, the degree of polymerisation of the backbone may be reduced before, during, or after the derivatisation with functional groups. The degree of polymerisation of the backbone may be increased by further polymerisation or by cross linking agents before, during, or after the derivatisation step.

Cellulose esters of hydroxyacids can be obtained using the acid anhydride, typically in acetic acid solution at 20 30 C. When the product has dissolved the liquid is poured into water. Glycollic and lactic esters can be made in this way.

Cellulose glycollate may also be obtained from cellulose chloracetate (B.P. 320,842) by treating 100 parts with 32 parts of NaOH in alcohol added in small portions.

An alternative method of preparing cellulose esters consists in the partial displacement of the acid radical in a cellulose ester by treatment with another acid of higher ionisation constant (F.P. 702,116). The ester is heated at about 100 with the acid which, preferably, should be a solvent for the ester. By this means cellulose acetate- oxalate, tartrate, maleate, pyruvate, salicylate and phenyl glycol late have been obtained, and from cellulose tribenzoate a cellulose benzoate-pyruvate. A cellulose acetate-lactate or acetate -glycol late could be made in this way also. As an example cellulose acetate (10 g) in dioxan (75 ml) containing oxalic acid (10 g) is heated at 100 for 2 hours under reflux.

Multiple esters are prepared by variations of this process. A simple ester of cellulose, e.g. the acetate, is dissolved in a mixture of two (or three) organic acids, each of which has an ionisation constant greater than that of acetic acid (1.82 x 10-5). With solid acids suitable solvents such as propionic acid, dioxan and ethylene dichloride are used. If a mixed cellulose ester is treated with an acid this should have an ionisation constant greater than that of either of the acids already in combination. Thus: A cellulose acetate- lactate -pyruvate is prepared from cellulose acetate, 40 per cent. acetyl (100 g), in a bath of 125 ml pyruvic acid and<B>125</B> ml of 85 per cent. lactic acid by heating at 100 for 18 hours. The product is soluble in water and is precipitated and washed with ether-acetone. M.p. 230-250<B>0</B>.

<U>Fibre Reactive Polymer</U> The compositions of the present invention may comprise at least one amine- or amide- epichlorohydrin resin or derivatives thereof.

In the context of the present invention these materials are polymeric, or at least oligomeric, in nature. Preferably, they have a weight average mean molecular weight of from 300 to 1,000,000 daltons.

The resins are sometimes referred to below as amine- epichlorohydrin resins and polyamine-epichlorohydrin (PAE) resins (the two terms being used synonymously) although these terms encompass both the amine and amide resins of the invention. The resins may also have a mixture of amine and amide groups.

The amine or amide-epichlorohydrin resins may have one or more functional groups capable of forming azetidinium groups and/or one or more azetidinium functional groups.

Alternatively, or additionally the resins may have one or more functional groups that contain epoxide groups or derivatives thereof e.g. Kymene 450TM (ex Hercules).

Suitable polyamine-epichlorohydrin (PAE) resins include those described in Wet Strength Resins and Their Application , pp 16-36, ed. L.L.Chan, Tappi Press, Atlanta, 1994. Suitable PAE resins can be identified by selecting those resins which impart increased wet strength to paper, after treatment, in a relatively simple test. Any amine or amide-epichlorohydrin resin having an epoxide functional group or derivative thereof is suitable for use according to the invention.

A particularly preferred class of amine or amide- epichlorohydrin resins for use in the invention are secondary amine or amide-based azetidinium resins, for ex=ample, those resins derived from a polyalkylene polyamine e.g. diethyl enetriamine (DETA), a polycarboxylic acid e.g. adipic acid or other dicarboxylic acids, and epichlorohydrin. Other polyamines or polyamides can also be advantageously used in the preparation of suitable PAE resins.

Another preferred class of amine-epichlorohydrin resins for use in the invention are those having an epoxide functional group or derivative thereof e.g. chlorohydrin.

The resin is preferably present in the product in a sufficient quantity to give an amount of<B>0.0005%</B> to 5% by weight on the fabric based on the weight of the fabric, more preferably 0.001% to 2% by weight on fabric. The amount of the first component in the composition required to achieve the above % by weight on fabric will typically be in the range 0.01% to 35% by weight, preferably 0.1 to 13.5% by weight.

The resins may be PDAA-epichlorohydrin resins or PMDAA- epichlorohydrin resins. PDAA is poly (dial lylamine) and PMDAA is poly (methyldiallyl(amine)). The compositions of the invention, when applied to a fabric, can impart benefits to the fabric when uncured. However, they may be cured by a domestic curing step including ironing and/or domestic tumble drying, preferably tumble drying. The curing is preferably carried out at a temperature in the range of from 50 to 100 C, more preferably from 80 to 100 C.

The composition of the invention may further comprise a silicone component. It is preferred if the silicone component is a dimethylpolysiloxane with amino alkyl groups. It may be used in the context of the present invention as an emulsion in water.

It is preferred if the silicone component is present in a ratio of first component: silicone of from 1:1 to 30:1, preferably 1:1 to 20:1, more preferably 2:1 to 20:1 and most preferably 5:1 to 15:1.

The compositions of the present invention may comprise a fibre reactive polymer in the form of a polymeric material which is capable of self cross-linking and/or of reacting with cellulose wherein the polymeric material comprises one or more poly (oxyalkylene) groups having an end group which comprises one or more amino groups or derivatives of said amino groups.

Such polymeric material is referred to herein as poly (oxyalkylene) fibre reactive polymer. The poly (oxyalkylene) fibre reactive polymer which can be used in the present invention can be any of the polymers or prepolymers derived from polyoxyalkyleneamines that are described in US 5571286, the contents of which are incorporated herein by reference. Methods for preparing the poly (oxyalkylene) fibre reactive polymer are described in US 5571286. Hence the poly (oxyalkylene) fibre reactive polymer can be, for example, the reaction product of a diamine or triamine polyoxyalkylene polymer having a polymerisation degree of from 4 to 50 or a mixture thereof with epichlorohydrin in a ratio of epichlorohydrin to amino nitrogen of from 1:1 to 3:1.

The amino groups in the poly (oxyalkylene) fibre reactive polymer may wholly or partly in the form of derivatives of amino groups. Derivatives include, for example, adducts formed by alkylation or hydroxyalkylation at the nitrogen atom or by the formation of an amide group at the nitrogen atom. The derivatives may be formed by the reaction of the amino groups with a bifunctional bridging agent or with a cross-linking agent.

Preferably, the poly (oxyalkylene) fibre reactive polymer is obtainable by the reaction of a polymer of formula B(R)n, wherein n is from 1 to 20, B is a backbone group to which each R is covalently bonded and R is a group comprising a poly (oxyalkylene) chain, which chain comprises an amino end group, the polymer being optionally reacted with a bridging compound, with a cross-linking agent. It will thus be appreciated that the poly (oxyalkylene) fibre reactive polymer is a relatively complex mixture comprising a number of different compounds, some or all of which may be cross- linked.

The poly (oxyalkylene) chain which forms a part of the R group may be, for example a poly (oxyethylene) or poly (oxyprop-1,2-ylene) chain. The length of the chain can vary from 2 to 100 repeat units.

Conveniently,n is 2 or 3. It will be appreciated that n may not be a whole number where the poly (oxyalkylene) fibre reactive polymer comprises a mixture of different polymers of formula B (R) n.

In some of the poly (oxyalkylene) fibre reactive polymer which may be used in the invention,B is -O-CH2 (CH) m-CH2-O-

(ie, B is the residue of glycerol) and m is equal to n-2. However, B can also represent other values such as , for example, the residue of other triols or the residue of a di- , tetra-, penta- or hexa- hydroxy compound. Alternatively, B can represent the residue of a di-, tri- or poly- amine. Preferably, at least one R group has the formula - (OCH2CH (R') ) p-A-NHR' ' , wherein R' is H or CH3 , p is an integer from 5 to 30, A is an alkylene group and R " is H or alkyl. More preferably, p is from 10 to 25.

The term alkyl , as used herein, includes C1 to C6 alkyl, optionally substituted on the alkyl chain, which may be branched or unbranched and, for C3 to C6 alkyl, may be cyclic. The term alkylene is defined similarly but refers to a divalent radical.

It will be appreciated that the term end group refers to the group at or near to the end of the poly (oxyalkylene) chain, which end, when the polymer is of formula B(R)n, is at the other end of the polymer chain from the end which is attached to B.

Suitable polymers of formula B(R)n include those having the following structure:

wherein R' is as defined hereinbefore, p, q and r are integers which may be the same or different and may be from 5 to 30 and A is branched or unbranched lower alkylene. The cross-linking agent which is used to form the poly (oxyalkylene) fibre reactive polymer by reaction with the polymer, or the polymer after prior reaction with the bridging compound, preferably comprises an epihalohydrin. Epichlorohydrin is a suitable epihalohydrin.

Preferably the molar ratio of cross-linking agent to polymer of formula B(R)n is from 0.5:1 to 4:1. Other amounts of cross-linking agent may be present in the poly (oxyalkylene) fibre reactive polymer. Suitable bridging compounds comprise two epoxide or carboxylic acid groups. The epoxide or carboxylic acid groups may be linked by a linker comprising alkylene, arylene, poly (oxyalkylene) or siloxane groups or combinations thereof. Examples of bridging compounds therefore include benzene- 1,4-dicarboxylic acid, hexane-1,6- dicarboxylic acid and poly (oxyethylene) compounds terminated at both ends of the molecule by an epoxide group. Other suitable bridging compounds are disclosed in US 5571286. Preferably, the poly (oxyalkylene) fibre reactive polymer is capable of increasing the wet strength of paper by at least 200% compared to untreated paper when applied to paper having a weight of 80 g/m2 at a level of 1% solids by weight based on weight of paper, according to the test method described hereinafter.

Polymeric materials which are suitable for use in the present invention are available from Precision Processes Textiles (Ambergate, Derbyshire, UK) under the trade marks POLYMER AM and POLYMER MRSM. The polymeric materials of the invention are preferably in the form of aqueous solutions. Compositions of the present invetion may further comprise a textile compatible carrier for the fibre reactive polymer. In the context of the present invention the term textile compatible carrier is a component which can assist in the interaction of the first component with the fabric. The carrier can also provide benefits in addition to those provided by the first component e.g. softening, cleaning etc. The carrier may be a water or a detergent -active compound or a fabric softener or conditioning compound or other suitable detergent. or fabric treatment agent.

If the composition of the invention is to be used in a laundry process as part of a conventional fabric treatment product, such as a detergent composition, the textile- compatible carrier will typically be a detergent -active compound. Whereas, if the fabric treatment product is a rinse conditioner, the textile-compatible carrier will be a fabric softening and/or conditioning compound.

If the composition of the invention is to be used before, or after, the laundry process it may be in the form of a spray or foaming product.

The nature of the textile compatible carrier will be dictated to a large extent by the stage at which the composition is used in a laundering process, the compositions being capable of being used, in principle, at any stage of the process.

The polymeric material is preferably present in the product in a sufficient quantity to give an amount of<B>0.0005%</B> to 5 % by weight on the fabric based on the weight of the fabric, more preferably 0.001% to 2% by weight on fabric. The amount of the polymeric material in the composition required to achieve the above % by weight on fabric will typically be in the range 0.01% to 35% by weight, preferably 0.1 to 13.5% by weight. The compositions of the invention, when applied to a fabric, can impart benefits to the fabric when uncured. However, they may be cured by a domestic curing step including ironing and/or domestic tumble drying, preferably tumble drying. The curing is preferably carried out at a temperature in the range of from 50 to 100 C, more preferably from 80 to 100 C.

Compositions of the invention may additionally comprise at least one anionic polymer, wherein the cationic and the anionic polymer are present in amounts such that the overall charge provided by the polymers is positive.

The amine- or amide- epichlorohidrin resin may be present in the composition in an amount of from 0.01-35% by weight.

The anionic polymer may be present in the composition in an amount of 0.01-35% by weight.

The anionic polymer may be any polymeric compound having a single unit which repeats in the compound, on average at least five times, a plurality of anionic groups and a molecular weight of at least 400 Da, preferably at least 600 Da. The anionic polymer has negatively charged groups which may be present in the repeating group and/or at one or both of the ends of the polymer chain and may be introduced during polymerisation or after the polymer has been formed. The anionic polymer may contain cationic groups as well as anionic groups but the net charge on the polymer chain must be negative. The anionic polymer can be wholly or partly amphoteric, provided that it is capable of having a net negative charge in the presence of the cationic polymer. It is preferred that the anionic polymer comprises anionic groups which are oxoanions of sulphur, carbon or phosphorus, or derivatives thereof such as, for example sulphonate (S03-) and carboxylate (C02-) groups. Preferably, the anionic polymer is a polyacrylate/styrene block copolymer. <U>Compositions</U> The rebuild agent and fibre reactive polymer may be incorporated into compositions containing only a diluent and/or also comprising another active ingredient. The compound is typically included in said compositions at levels of from 0.005% to 25% by weight, preferably 0.01% to 10%, most preferably 0.025% to 2.5%.

The component (s) of the composition should be such that when in use, e.g. when dissolved or dispersed in the wash or rinse liquor, deposition of the rebuild agent can occur. Most, if not all, conventional laundry wash and/or rinse compositions already fulfil this requirement. However, to assist such deposition, one may include at least one water- soluble additive capble of inducing or assisting the said deposition of the rebuild agent.

The optional water soluble additive (s) is/are selected e.g. from those which, in the washing or rinsing solution, have an anion capable of decomposing and a cation capable of forming a soluble salt with the anion originating from the substituent or substituents. In the case of rebuild agents which are water-dispersible cellulose esters, the said deposition additives can be in particular water-soluble, alkaline, de-esterifying additives, for example the carbonates, hydrogen carbonates, oxalates, tartrates, etc. of alkali metals, in particular sodium.

The water-soluble additive, capable of inducing, in the washing or rinsing medium, the deposition rebuild agent,-is present in the said composition in an amount at least sufficient to induce chemical change in all groups provided for this prupose. In the case of a water-dispersible esterified cellulose, the alkaline de-esterifying additive is present in the said composition in an amount at least sufficient to de-esterify the said water-soluble esterified cellulose. This amount is preferably at least 5 times, preferably at least 10 times the stoichiometric amount necessary for complete de-esterification of the ester. It is generally less than 100 times the necessary stoichiometric amount.

The other active ingredient (if present) in the compositions is preferably a surface active agent or a fabric conditioning agent. More than one active ingredient may be included. For some applications a mixture of active ingredients may be used.

The compositions of the invention may be in any physical form e.g. a solid such as a powder or granules, a tablet, a solid bar, a paste, gel or (especially aqueous) liquid. In particular the compositions may be used in laundry compositions, especially in liquid or powder laundry composition, for example for use in a wash and/or rinse and/or drying process.

Where the composition of the invention is a fabric softening composition, it may be in the form of a tumble dryer article. That is, it may comprise a sheet of absorbent material onto which a composition according to the present invention is absorbed, to be placed in a tumble dryer with clothes, to soften the clothes.

The compositions of the present invention are preferably laundry compositions, especially main wash (fabric washing) compositions or rinse-added softening compositions. The main wash compositions may include a fabric softening agent and rinse-added fabric softening compositions may include surface-active compounds, particularly non-ionic surface- active compounds, if appropriate.

The detergent compositions of the invention may contain a surface-active compound (surfactant) which may be chosen from soap and non-soap anionic, cationic, non-ionic, amphoteric and zwitterionic surface-active compounds and mixtures thereof. Many suitable surface-active compounds are available and are fully described in the literature, for example, in "Surf ace -Active Agents and Detergents", Volumes I and II, by Schwartz, Perry and Berch.

The preferred detergent -active compounds that can be used are soaps and synthetic non-soap anionic and non-ionic compounds. The compositions of the invention may contain linear alkylbenzene sulphonate, particularly linear alkylbenzene sulphonates having an alkyl chain length of CB-C15. It is preferred if the level of linear alkylbenzene sulphonate is from 0 wt% to 30 wt%, more preferably 1 wt % to 25 wt%, most preferably from 2 wt% to 15 wt%.

The compositions of the invention may additionally or alternatively contain one or more other anionic surfactants in total amounts corresponding to percentages quoted above for alkyl benzene sulphonates. Suitable anionic surfactants are well-known to those skilled in the art. These include primary and secondary alkyl sulphates, particularly C8-C1.5 primary alkyl sulphates; alkyl ether sulphates; olefin sulphonates; alkyl xylene sulphonates; dialkyl sulphosuccinates; and fatty acid ester sulphonates. Sodium salts are generally preferred.

The compositions of the invention may contain non-ionic surfactant. Nonionic surfactants that may be used include the primary and secondary alcohol ethoxylates, especially the C8-C20 aliphatic alcohols ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol, and more especially the C10-Cls primary and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles of ethylene oxide per mole of alcohol. Non-ethoxylated nonionic surfactants include alkylpolyglycosides, glycerol monoethers, and polyhydroxyamides (glucamide). It is preferred if the level of total non-ionic surfactant is from 0 wt% to 30 wt%, preferably from 1 wt% to 25 wt%, most preferably from 2 wt% to 15 wt%.

Another class of suitable surfactants comprises certain mono- alkyl cationic surfactants useful in main-wash laundry compositions. Cationic surfactants that may be used include quaternary ammonium salts of the general formula RlR2R3R4N+ X_ wherein the R groups are long or short hydrocarbon chains, typically alkyl, hydroxyalkyl or ethoxylated alkyl groups, and X is a counter-ion (for example, compounds in which R1 is a C8-C22 alkyl group, preferably a C8-Clo or C12-C14 alkyl group, R2 is a methyl group, and R3 and R4, which may be the same or different, are methyl or hydroxyethyl groups); and cationic esters (for example, choline esters).

The choice of surface-active compound (surfactant), and the amount present, will depend on the intended use of the detergent composition. In fabric washing compositions, different surfactant systems may be chosen, as is well known to the skilled formulator, for handwashing products and for products intended for use in different types of washing machine.

The total amount of surfactant present will also depend on the intended end use and may be as high as 60 wt%, for example, in a composition for washing fabrics by hand. In compositions for machine washing of fabrics, an amount of from 5 to 40 wt% is generally appropriate. Typically the compositions will comprise at least 2 wt% surfactant e.g. 2 60%, preferably 15-40% most preferably 25-35%. Detergent compositions suitable for use in most automatic fabric washing machines generally contain anionic non-soap surfactant, or non-ionic surfactant, or combinations of the two in any suitable ratio, optionally together with soap. Any conventional fabric conditioning agent may be used in the compositions of the present invention. The conditioning agents may be cationic or non-ionic. If the fabric conditioning compound is to be employed in a main wash detergent composition the compound will typically be non-ionic. If used in the rinse phase, they will typically be cationic. They may for example be used in amounts from <B>0.5%</B> to 35a, preferably from to to<B>30%</B> more preferably from 3% to<B>25%</B> by weight of the composition.

Preferably the fabric conditioning agent has two long chain alkyl or alkenyl chains each having an average chain length greater than or equal to C16. Most preferably at least<B>50%</B> of the long chain alkyl or alkenyl groups have a chain length of C18 or above.

It is preferred if the long chain alkyl or alkenyl groups of the fabric conditioning agents are predominantly linear.

The fabric conditioning agents are preferably compounds that provide excellent softening, and are characterised by a chain melting L(3 to La transition temperature greater than 25 C, preferably greater than 35 C, most preferably greater than 45 C. This L(3 to La transition can be measured by DSC as defined in Handbook of Lipid Bilayers, D Marsh, CRC Press, Boca Raton, Florida, 1990 (pages 137 and 337). Substantially insoluble fabric conditioning compounds in the context of this invention are defined as fabric conditioning compounds having a solubility less than 1 x 10-3 wt % in deminerailised water at 20 C. Preferably the fabric softening compounds have a solubility less than 1 x 10-4 wt o , most preferably less than 1 x 10-$ to 1 x 10-6. Preferred cationic fabric softening agents comprise a substantially water insoluble quaternary ammonium material comprising a single alkyl or alkenyl long chain having an average chain length greater than or equal to CZO or, more preferably, a compound comprising a polar head group and two alkyl or alkenyl chains having an average chain length greater than or equal to C14.

Preferably, the cationic fabric softening agent is a quaternary ammonium material or a quaternary ammonium material containing at least one ester group. The quaternary ammonium compounds containing at least one ester group are referred to herein as ester-linked quaternary ammonium compounds.

As used in the context of the quarternary ammonium catianic fabric softening agents, the term ester group , includes an ester group which is a linking group in the molecule.

It is preferred for the ester-linked quaternary ammonium compounds to contain two or more ester groups. In both monoester and the diester quaternary ammonium compounds it is preferred if the ester group (s) is a linking group between the nitrogen atom and an alkyl group. The ester groups (s) are preferably attached to the nitrogen atom via another hydrocarbyl group.

Also preferred are quaternary ammonium compounds containing at least one ester group, preferably two, wherein at least one higher molecular weight group containing at least one ester group and two or three lower molecular weight groups are linked to a common nitrogen atom to produce a cation and wherein the electrically balancing anion is a halide, acetate or lower alkosulphate ion, such as chloride or methosulphate. The higher molecular weight substituent on the nitrogen is preferably a higher alkyl group, containing 12 to 28, preferably 12 to 22, e.g. 12 to 20 carbon atoms, such as coco-alkyl, tallowalkyl, hydrogenated tallowalkyl or substituted higher alkyl, and the lower molecular weight substituents are preferably lower alkyl of 1 to 4 carbon atoms, such as methyl or ethyl, or substituted lower alkyl. one or more of the said lower molecular weight substituents may include an aryl moiety or may be replaced by an aryl, such as benzyl, phenyl or other suitable substituents. Preferably the quaternary ammonium material is a compound having two C12-C22 alkyl or alkenyl groups connected to a quaternary ammonium head group via at least one ester link, preferably two ester links or a compound comprising a single long chain with an average chain length equal to or greater than C20.

More preferably, the quaternary ammonium material comprises a compound having two long chain alkyl or alkenyl chains with an average chain length equal to or greater than C14. Even more preferably each chain has an average chain length equal to or greater than C16. Most preferably at least 500 of each long chain alkyl or alkenyl group has a chain length of C18. It is preferred if the long chain alkyl or alkenyl groups are predominantly linear.

The most preferred type of ester-linked quaternary ammonium material that can be used in compositions according to the invention is represented by the formula (A) :

wherein R1, n, R2 and X- are as defined above.

It is advantageous for environmental reasons if the quaternary ammonium material is biologically degradable. Preferred materials of this class such as 1,2 bis[hardened tallowoyloxy]-3-trimethylammonium propane chloride and their method of preparation are, for example, described in US-A-4 137 180. Preferably these materials comprise small amounts of the corresponding monoester as described in US-A-4 137 180 for example 1-hardened tallow-oyloxy-2-hydroxy-3- trimethylammonium propane chloride.

Another class of preferred ester-linked quaternary ammonium materials for use in compositions according to the invention can be represented by the formula:

wherein each R1 group is independently selected from C1_4 alkyl, hydroxyalkyl or C2-4 alkenyl groups; and wherein each R2 group is independently selected from C$_28 alkyl or alkenyl groups; X- is any suitable counter-ion, i.e. a halide, acetate or lower alkosulphate ion, such as chloride or methosulphate.

n is an integer from 1-5 or is 0 It is especially preferred that each R1 group is methyl and each n is 2.

Of the compounds of formula (B), Di-(tallowyloxyethyl)- dimethyl ammonium chloride, available from Hoechst, is the most preferred. Di-(hardened tallowyloxyethyl)dimet hyl ammonium chloride, ex Hoechst and di-(tallowyloxyethyl)- methyl hydroxyethyl methosulphate are also preferred. Another preferred class of quaternary ammonium cationic fabric softening agent is def fined by formula (C):-

where R1, RZ and X are as hereinbefore defined.

A preferred material of formula (C) is di-hardened tallow- diethyl ammonium chloride, sold under the Trademark Arquad 2HT.

The optionally ester-linked quaternary ammonium material may contain optional additional components, as known in the art, in particular, low molecular weight solvents, for instance isopropanol and/or ethanol, and co-actives such as nonionic softeners, for example fatty acid or sorbitan esters.

The compositions of the invention, when used as main wash fabric washing compositions, will generally also contain one or more detergency builders. The total amount of detergency builder in the compositions will typically range from 5 to 80 wt-., preferably from 10 to 60 wt o .

Inorganic builders that may be present include sodium carbonate, if desired in combination with a crystallisation seed for calcium carbonate, as disclosed in GB 1 437 950 (Unilever) ; crystalline and amorphous aluminosilicates, for example, zeolites as disclosed in GB 1 473 201 (Henkel), amorphous aluminosilicates as disclosed in GB 1 473 202 (Henkel) and mixed crystal line/ amorphous aluminosilicates as disclosed in GB 1 470 250 (Procter & Gamble) ; and layered silicates as disclosed in EP 164 514B (Hoechst). Inorganic phosphate builders, for example, sodium orthophosphate, pyrophosphate and tripolyphosphate are also suitable for use with this invention.

The compositions of the invention preferably contain an alkali metal, preferably sodium, aluminosilicate builder. Sodium aluminosilicates may generally be incorporated in amounts of from 10 to 70% by weight (anhydrous basis), preferably from 25 to 50 wt%.

The alkali metal aluminosilicate may be either crystalline or amorphous or mixtures thereof, having the general formula: 0.8-1.5 Na20. A1203. 0.8-6 Si02 These materials contain some bound water and are required to have a calcium ion exchange capacity of at least 50 mg CaO/g. The preferred sodium aluminosilicates contain 1.5-3.5 Si02 units (in the formula above). Both the amorphous and the crystalline materials can be prepared readily by reaction between sodium silicate and sodium aluminate, as amply described in the literature. Suitable crystalline sodium aluminosilicate ion-exchange detergency builders are described, for example, in GB 1 429 143 (Procter & Gamble). The preferred sodium aluminosilicates of this type are the well-known commercially available zeolites A and X, and mixtures thereof. The zeolite may be the commercially available zeolite 4A now widely used in laundry detergent powders. However, according to a preferred embodiment of the invention, the zeolite builder incorporated in the compositions of the invention is maximum aluminium zeolite P (zeolite MAP) as described and claimed in EP 384 070A (Unilever). Zeolite MAP is defined as an alkali metal aluminosilicate of the zeolite P type having a silicon to aluminium ratio not exceeding 1.33, preferably within the range of from 0.90 to 1.33, and more preferably within the range of from 0.90 to 1.20.

Especially preferred is zeolite MAP having a silicon to aluminium ratio not exceeding 1.07, more preferably about 1.00. The calcium binding capacity of zeolite MAP is generally at least 150 mg CaO per g of anhydrous material. Organic builders that may be present include polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphinates; monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di and trisuccinates, carboxymethyloxy succinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and alkenylmalonates and succinates; and sulphonated fatty acid salts. This list is not intended to be exhaustive.

Especially preferred organic builders are citrates, suitably used in amounts of from 5 to 30 wt%, preferably from 10 to 25 wt%; and acrylic polymers, more especially acrylic/maleic copolymers, suitably used in amounts of from 0.5 to 15 wt%, preferably from 1 to 10 wt%. Builders, both inorganic and organic, are preferably present in alkali metal salt, especially sodium salt, form. Compositions according to the invention may also suitably contain a bleach system. Fabric washing compositions may desirably contain peroxy bleach compounds, for example, inorganic persalts or organic peroxyacids, capable of yielding hydrogen peroxide in aqueous solution.

Suitable peroxy bleach compounds include organic peroxides such as urea peroxide, and inorganic persalts such as the alkali metal perborates, percarbonates, perphosphates, persilicates and persulphates. Preferred inorganic persalts are sodium perborate monohydrate and tetrahydrate, and sodium percarbonate.

Especially preferred is sodium percarbonate having a protective coating against destabilisation by moisture. Sodium percarbonate having a protective coating comprising sodium metaborate and sodium silicate is disclosed in GB 2 123 044B (Kao).

The peroxy bleach compound is suitably present in an amount of from 0.1 to 35 wt%, preferably from 0.5 to 25 wt%. The peroxy bleach compound may be used in conjunction with a bleach activator (bleach precursor) to improve bleaching action at low wash temperatures. The bleach precursor is suitably present in an amount of from 0.1 to 8 wt%, preferably from 0.5 to 5 wt%. Preferred bleach precursors are peroxycarboxylic acid precursors, more especially peracetic acid precursors and pernoanoic acid precursors. Especially preferred bleach precursors suitable for use in the present invention are N,N,N',N',-tetracetyl ethylenediamine (TAED) and sodium noanoyloxybenzene sulphonate (SNOBS). The novel quaternary ammonium and phosphonium bleach precursors disclosed in US 4 751 015 and US 4 818 426 (Lever Brothers Company) and EP 402 971A (Unilever), and the cationic bleach precursors disclosed in EP 284 292A and EP 303 520A (Kao) are also of interest. The bleach system can be either supplemented with or replaced by a peroxyacid. examples of such peracids can be found in US 4 686 063 and US 5 397 501 (Unilever). A preferred example is the imido peroxycarboxylic class of peracids described in EP A 325 288, EP A 349 940, DE 382 3172 and EP 325 289. A particularly preferred example is phtalimido peroxy caproic acid (PAP). Such peracids are suitably present at 0.1 - 12%, preferably 0.5 - 10%.

A bleach stabiliser (transistor metal sequestrant) may also be present. Suitable bleach stabilisers include ethylenediamine tetra-acetate (EDTA), the polyphosphonates such as Dequest (Trade Mark) and non-phosphate stabilisers such as EDDS (ethylene diamine di-succinic acid). These bleach stabilisers are also useful for stain removal especially in products containing low levels of bleaching species or no bleaching species.

An especially preferred bleach system comprises a peroxy bleach compound (preferably sodium percarbonate optionally together with a bleach activator), and a transition metal bleach catalyst as described and claimed in EP 458 397A ,EP 458 398A and EP 509 787A (Unilever).

The compositions according to the invention may also contain one or more enzyme (s). Suitable enzymes include the proteases, amylases, cellulases, oxidases, peroxidases and lipases usable for incorporation in detergent compositions. Preferred proteolytic enzymes (proteases) are, catalytically active protein materials which degrade or alter protein types of stains when present as in fabric stains in a hydrolysis reaction. They may be of any suitable origin, such as vegetable, animal, bacterial or yeast origin.

Proteolytic enzymes or proteases of various qualities and origins and having activity in various pH ranges of from 4-12 are available and can be used in the instant invention. Examples of suitable proteolytic enzymes are the subtilisins which are obtained from particular strains of B. Subtilis <U>B</U>. licheniformis, such as the commercially available subtilisins Maxatase (Trade Mark), as supplied by Gist Brocades N.V., Delft, Holland, and Alcalase (Trade Mark), as supplied by Novo Industri A/S, Copenhagen, Denmark.

Particularly suitable is a protease obtained from a strain of Bacillus having maximum activity throughout the pH range of 8-12, being commercially available, e.g. from Novo Industri A/S under the registered trade-names Esperase (Trade Mark) and Savinase (Trade-Mark). The preparation of these and analogous enzymes is described in GB 1 243 785. Other commercial proteases are Kazusase (Trade Mark obtainable from Showa-Denko of Japan), Optimase (Trade Mark from Miles Kali-Chemie, Hannover, West Germany), and Superase (Trade Mark obtainable from Pfizer of U. S .A.) .

Detergency enzymes are commonly employed in granular form in amounts of from about 0.1 to about 3.0 wt%. However, any suitable physical form of enzyme may be used.

The compositions of the invention may contain alkali metal, preferably sodium carbonate, in order to increase detergency and ease processing. Sodium carbonate may suitably be present in amounts ranging from 1 to 60 wt%, preferably from 2 to 40 wt%. However, compositions containing little or no sodium carbonate are also within the scope of the invention.

Powder flow may be improved by the incorporation of a small amount of a powder structurant, for example, a fatty acid (or fatty acid soap), a sugar, an acrylate or acrylate/maleate copolymer, or sodium silicate. One preferred powder structurant is fatty acid soap, suitably present in an amount of from 1 to 5 wt%.

Other materials that may be present in detergent compositions of the invention include sodium silicate; antiredeposition agents such as cellulosic polymers; inorganic salts such as sodium sulphate; lather control agents or lather boosters as appropriate; proteolytic and lipolytic enzymes; dyes; coloured speckles; perfumes; foam controllers; fluorescers and decoupling polymers. This list is not intended to be exhaustive. It is often advantageous if soil release or soil suspending polymers are present.

The detergent composition when diluted in the wash liquor (during a typical wash cycle) will typically give a pH of the wash liquor from 7 to 10.5 for a main wash detergent. Particulate detergent compositions are suitably prepared by spray-drying a slurry of compatible heat- insensitive ingredients, and then spraying on or post-dosing those ingredients unsuitable for processing via the slurry. The skilled detergent formulator will have no difficulty in deciding which ingredients should be included in the slurry and which should not.

Particulate detergent compositions of the invention preferably have a bulk density of at least 400 g/1, more preferably at least 500 g/1. Especially preferred compositions have bulk densities of at least 650 g/litre, more preferably at least 700 g/litre.

Such powders may be prepared either by post-tower densification of spray-dried powder, or by wholly non-tower methods such as dry mixing and granulation; in both cases a high-speed mixer/ granulator may advantageously be used.

Processes using high-speed mixer/granulators are disclosed, for example, in EP 340 013A, EP 367 339A, EP 390 251A and EP 420 317A (Unilever) .

Liquid detergent compositions can be prepared by admixing the essential and optional ingredients thereof in any desired order to provide compositions containing components in the requisite concentrations. Liquid compositions according to the present invention can also be in compact form which means it will contain a lower level of water compared to a conventional liquid detergent.

<U>Treatment Process</U> The fabrics which may be treated in the present invention comprise cellulosic fibres, preferably from 1% to 1000 cellulosic fibres (more preferably 5% to 100% cellulosic fibres, most preferably 40% to 100%). When the fabric contains less than 100% cellulosic fibres, the balance comprises other fibres or blends of fibres suitable for use in garments such as polyester, for example. Preferably, the cellulosic fibres are of cotton or regenerated cellulose such as viscose.

Treatment of the fabric with the rebuild agent can be made by any suitable method such as washing, soaking or rinsing of the substrate.

Typically the treatment will involve a washing or rinsing method such as treatment in the main wash or rinse cycle of a washing machine and involves contacting the fabric with an aqueous medium comprising the composition of the present invention.

The present invention will now be explained in more detail by way of the following non-limiting examples. <U>Examples</U> Example <U>1: Preparation of Cellulose</U> "Monoacetate" This was prepared by the methods of WO 91/16359 <U>Example 1a</U> 30.0 g of cellulose diacetate (DS 2.45) (the starting cellulose ester), 0.08 g of molybdenum carbonyl (catalyst), 213.6 g of methanol (reactive solvent 1) and 30.0 g of water (reactive solvent 2) are loaded into a 1-litre, steel Parr reactor equipped with a magnetically coupled agitator. The reactor is sealed, then heated to 140 C. The heat-up time is typically 1 to 2 hours. The initial pressure in the reactor is typically 200 500 psi (1379 3447 kPa) nitrogen. The reaction mixture is stirred at 140 C for 7 hours. Then the reaction mixture is allowed to cool to room temperature, which typically takes 2 to 3 hours. The products are isolated by filtration of the resulting slurry. The reactive solvent, as well as by-products such as methyl acetate, can be recovered from the filtrate by distillation. The product is cellulose monoacetate and the yield is 66%. The key analyses are: DS = 0.48; intrinsic viscosity (0.25 g per 100 ml of DMSO) = 0.55.

<U>Example lb</U> 30.0 g of cellulose diacetate (DS 2.45) (the starting cellulose ester), 0.05 g of molybdenum (VI) oxide and 237.3 g of methanol (reactive solvent) are loaded into a 1-litre, steel Parr reactor equipped with a magnetically coupled agitator. The reactor is sealed, then heated to 155 C. The heat-up time is typically 1 to 2 hours. The initial pressure in the reactor is typically 200 500 psi (1379 3447 kPa) nitrogen. The reaction mixture is stirred at 155 C for 3 hours. Then the reaction mixture is allowed to cool to room temperature, which typically takes 2 to 3 hours. The products are isolated by filtration of the resulting slurry. The reactive solvent, as well as certain by-products such as methyl acetate ,can be recovered from the filtrate by distillation. The product is cellulose monoacetate and the yield is 87%. The key analyses are: DS = 0.50; intrinsic viscosity (0.25 g per 100 ml of DMSO) = 1.16.

<U>Example 2: Preparation of cellulose</U> hemisuccinate <U>(first</U> <U>route)</U> Cellulose hemisuccinate was prepared following B.P. 410,125. A mixture of cellulose (Whatman cellulose powder CF11 which is cotton, 5g), succinic anhydride (25 g), and pyridine (75 ml) was kept at 65 C for a week. On pouring into methanol the pyridinium salt of cellulose hemisuccinate was obtained. The crude cellulose hemisuccinate, pyridinium salt, was washed repeatedly with methanol to remove pyridine and unused reactants. The pyridinium salt of cellulose hemisuccinate was converted to the free acid form by driving off the pyridine under vacuum at < 95 C. Infrared spectra of reagents and products were recorded on a Bio-Rad FTS-7 infrared spectrometer using a Graseby Specac (Part #10500) Single Reflection Diamond ATR attachment.

The degree of substitution of cellulose hemisuccinate prepared from cotton fibres was determined by a one-step neutralisation of the carboxylic acid groups and hydrolysis of the ester groups, using an excess of sodium hydroxide, followed by titration of the excess sodium hydroxide with a standard solution of hydrochloric acid, using phenolphthalein as an indicator. The figure thus obtained was 2.8.

The infrared spectrum of the product in its neutralised, sodium salt form, has two distinct bands attributable to the stretching of C=O. The band at 1574 cm-1 is attributable to carboxylate anion, a band for which is expected at 1550-1610 cm-1. It is therefore reasonable to attribute the other band at 1727 cm-1 to ester, a band for which is expected at<B>1735</B> - 1750cm1. The infrared spectrum is therefore consistent with a hemiester salt. <U>Example 3: Preparation of cellulose</U> hemisuccinate <U>(route 2)</U> Cellulose hemisuccinate was prepared following GB-A-410,125. A mixture of cellulose (Avicel PH105, 5g), succinic anhydride (25 g), and pyridine (75 ml) was kept at 65 C for a week. On pouring into methanol the pyridinium salt of cellulose hemisuccinate was obtained. The crude cellulose hemisuccinate, pyridinium salt, was washed repeatedly with methanol to remove pyridine and unused reactants.

When this gel was mixed with dilute aqueous sodium hydroxide, it did not immediately dissolve but remained as lumps, but it did slowly dissolve to form a near-optically-clear solution. The fact that the methanol-washed cellulose hemisuccinate was not immediately soluble in dilute aqueous sodium hydroxide indicated that the cellulose hemisuccinate was slightly cross linked.

The methanol-rinsed cellulose hemisuccinate was used to prepare a cellulose hemisuccinate having a lower degree of substitution and with fewer cross links which was water dispersable.

A homogeneous solution was prepared by partially hydrolysing the cellulose hemisuccinate as follows. Cellulose hemisuccinate prepared from microcrystalline cellulose, in the form of a gel of cellulose hemisuccinate, pyridinium salt, dispersed in methanol, was added to 50 ml of stirred 0.1 M NaCl solution at 50 C. 0.1 M NaOH solution was added until the pH was raised to -7.0 (18.0 ml was required).

More 0.1 M NaOH solution was added until the pH was raised to -10.5 (3.0 ml was required). This pH was then maintained for 45 minutes by further additions of 0.1 M NaOH solution (4.2 ml was required). The mixture was then cooled to room temperature and neutralised using 1.0 M HC1 (0.18 ml was required). After this procedure the solution was only slightly turbid. The polymer was separated from inorganic salts by ultrafiltration (Amicon, Inc.) employing a cellulose triacetate membrane with a molecular weight cut off of 10, 000 (Sartorious SM 145 39) .

The degree of substitution of cellulose hemisuccinate prepared from by this route was determined by a one-step neutralisation of the carboxylic acid groups and hydrolysis of the ester groups, using an excess of sodium hydroxide, followed by titration of the excess sodium hydroxide with a standard solution of hydrochloric acid, using phenolphthalein as an indicator. The figure thus obtained was 2.0.

Example <U>4: Preparation of cellulose</U> 2-(2-hydroxy-1- oxopropoxy)propanoate Following the method described in DE 3,322,118 a mixture of 2.33 g lactide (3,6-dirnethyl-1,4-dioxane-2,5-dione) and 29.7 g of cellulose solution (obtained by dissolving 14 g of microcrystalline cellulose (Avicel PH105) swollen with 14 g of N,N-dimethylacetamide in a mixture of 200 ml of N,N- dimethylacetamide and 16.8 g of lithium chloride) was treated with 1.5 ml of triethyl amine and stirred at 75 C for 1.5 hours. Cellulose 2-(2-hydroxy-l-oxopropoxy)propanoate was isolated by pipetting the reaction mixture into 300 ml of methanol. The product gel was washed with a further two batches of 300 ml of methanol. At this stage the methanol -swollen 2-(2- hydroxy-l-oxopropoxy)propanoate was water soluble.

The cellulose 2-(2-hydroxy-l-oxopropoxy)propanoate was dried in a vacuum oven at room temperature. The dry cellulose 2-(2- hydroxy-l-oxopropoxy)propanoate was partially soluble. Examples 5-84 are formulation Examples. In each case, the Polymer 1 specified is the material of Example 1. Polymer 2 is specified in the respective table. Example <U>5 to 24 : Spray-Dried Powder</U> <U>Component</U> % w/w

Na PAS 11.5 Dobanol <B>25-7</B> 6.3 Soap 2.0 Zeolite 24.1 SCMC 0.6 Na Citrate 10.6 Na Carbonate 23.0 Polymer 1 0.3 Polymer 2 see Table 1 Silicone oil 0.5 Dequest 2066 0.4 Sokalan CP5 0.9 Savinase 16L 0.7 Lipolase 0.1 Perfume 0.4 Water/salts to 100

<U>Table 1</U> <B><U>Example Polymer 2 w/w active in formulation</U></B> 5 Apomul SAK 5 6 Apomul SAK 3 7 Apomul SAK 1 8 Apomul SAK 0.5 9 Apomul SAK 0.25 10 Kenores 1440 3 11 Kymene 557H 3.2 12 Kymene 557H 2 13 Kymene 557H 1.6 14 Kymene LX 3.2 15 Kymene LX 3 16 Kymene 450 3.2 17 Kymene 451 2 18 Polymer AM 1.5 19 Polymer MRSM 1.5 Combinations with several polymers: 20 Apomul SAK 1.5 Silicone 1.5 21 Apomul SAK 1.5 CT45 1.5 22 Apomul SAK 1.5 Synthapret BAP 1.5 23 Apomul SAK 1.5 Lambent CP-I 1.5 24 Apomul SAK 1.5 Albucril LBV 50 1.5 Example <U>25 to 44: Detergent Granulate Prepared by</U> Non-Spray <U>Drying Method</U> The following composition was prepared by the two-stage mechanical granulation method described in EP-A- 367 339.

<U>Component % w/w</U> NaPAS 13.5 Dobanol 25-7 2.5 STPP 45.3 Na Carbonate 4.0 Polymer 1 0.28 Polymer 2 see Table 2 Na Silicate 10.1 Minors 1.5 Water balance

<U>Table 2</U> <U>Example Polymer 2 % w/w active in formulation</U> 25 Apomul SAK 5 26 Apomul SAK 3 27 Apomul SAK 1 28 Apomul SAK 0.5 29 Apomul SAK 0.25 30 Kenores 1440 3 31 Kymene 557H 3.2 32 Kymene 557H 2 33 Kymene 557H 1.6 34 Kymene LX 3.2 35 Kymene LX 3 36 Kymene 450 3.2 37 Kymene 451 2 38 Polymer AM 1.5 39 Polymer MRSM 1.5 Combinations with several polymers: 40 Apomul SAK 1.5 Silicone 1.5 41 Apomul SAK 1.5 CT45 1.5 42 Apomul SAK 1.5 Synthapret BAP 1.5 43 Apomul SAK 1.5 Lambent CP-I 1.5 44 Apomul SAK 1.5 Albucril LEV 50 1.5

<U>Example 45 to 64: Isotropic Laundry Liquid</U> <U>Component % w/w</U> Na-citrate (37.5%) 10.7 Propyleneglycol 7.5 Ethylene Glycol 4.5 Borax 3.0 Savinase 16L 0.3 Lipolase 0.1 Polymer 1 0.25 Polymer 2 see Table 3 Monoethanolamine 0.5 Cocofatty acid 1.7 NaOH <B>(50%)</B> 2.2 LAS 10.3 Dobanol 25-7 6.3 LES 7.6 Minors 1.3 (adjust pH to 7 with NaOH) Water up to 100 Table <U>3:</U> <U>Example</U> Polymer <U>2</U> % w/w <U>active in formulation</U> 45 Apomul SAK 5 46 Apomul SAK 3 47 Apomul SAK 1 48 Apomul SAK 0.5 49 Apomul SAK 0.25 50 Kenores 1440 3 51 Kymene 557H 3.2 52 Kymene 557H 2 53 Kymene 557H 1.6 54 Kymene LX 3.2 55 Kymene LX 3 56 Kymene 450 3.2 57 Kymene 451 2 58 Polymer AM 1.5 59 Polymer MRSM 1.5 Combinations with several polymers: 60 Apomul SAK 1.5 Silicone 1.5 61 Apomul SAK 1.5 CT45 1.5 62 Apomul SAK 1.5 Synthapret BAP 1.5 63 Apomul SAK 1.5 Lambent CP-I 1.5 64 Apomul SAK 1.5 Albucril LEV 50 1.5 <U>Example 65 to 84: Structured</U> Laundry Liquid <U>Component %</U> w/w LAS 16.5 Dobanol 25-7 9 Oleic acid (Priolene 6907) 4.5 Zeolite 15 KOH, neutralisation of acids and pH to 8.5 Citric acid 8.2 deflocculating polymer 1 Protease 0.38 Lipolase 0.2 Polymer 1 0.15 Polymer 2 see Table 4 Minors 0.4 Water to 1000

<U>Table 4</U> <U>Example Polymer 2 o w/w active in formulation</U> 65 Apomul SAK 5 66 Apomul SAK 3 67 Apomul SAK 1 68 Apomul SAK 0.5 69 Apomul SAK 0.25 70 Kenores 1440 3 71 Kymene 557H 3.2 72 Kymene 557H 2 73 Kymene 557H 1.6 74 Kymene LX 3.2 75 Kymene LX 3 76 Kymene 450 3.2 77 Kymene 451 2 78 Polymer AM 1.5 79 Polymer MRSM 1.5 Combinations with several polymers: 80 Apomul SAK 1.5 Silicone 1.5 81 Apomul SAK 1.5 CT45 1.5 82 Apomul SAK 1.5 Synthapret DAP 1.5 83 Apomul SAK 1.5 Lambent CP-I 1.5 84 Apomul SAK 1.5 Albucril LEV 50 1.5

Raw Material Specification <B><U>Component Specification</U></B> LAS Linear Alkyl Benzene Sulphonic-acid, Marlon AS3, ex Huls Na-LAS LAS-acid neutralised with NaOH Na-PAS primary alkyl sulphuric acid, neutralised with NaOH Dobanol 25-7 C12-15 ethoxylated alcohol, 7E0, ex Shell LES Lauryl Ether Sulphate, Dobanol 25-S3, ex Shell Zeolite Wessalith P, ex Degussa STPP Sodium Tri PolyPhosphate, Thermphos NW, ex Hoechst Dequest 2066 Metal chelating agent, ex Monsanto silicone oil Antifoam, <B>DE</B> 100, ex Dow Corning Lipolase Type 100L, ex Novo Savinase 16L Protease, ex Novo Sokalan CP5 Acrylic/Maleic Builder Polymer ex BASF Deflocculating Polymer Polymer A-11 disclosed in EP-A- 346 995 SCMC Sodium Carboxymethyl Cellulose Minors antiredeposition polymers, transition-metal scavangers/bleach stabilisers, fluorescers, antifoams, dye-transfer-inhibition polymers, enzymes, and perfume.

<U>Polymer 2</U> Apomul SAK Brookstone Chemicals Kenores 1440 Akzo Nobel Kymene series Hercules Polymer AM Precision Processes Textiles of Ambergate, Derbyshire Polymer MRSM Precision Processes Textiles of Ambergate, Derbyshire Silicone Polydimethylsiloxane, ex Al drich CT45 Amino Polydimethylsiloxane, ex Wacker Synthapret BAP Bayer Lambent CP-I Lambert Albucril LEV 50 BF Goodrich

Claims (19)

1. CLAIMS: 1. A laundry treatment composition comprising (a) a water-soluble or water-dispersible rebuild agent for deposition onto a fabric during a treatment process wherein the rebuild agent undergoes during the treatment process, a chemical change by which change the affinity of the rebuild agent for the fabric is increased, said chemical change resulting in the loss or modification of one or more groups covalently bonded to be pendant to a polymeric backbone of the rebuild agent via an ester linkage, the ester-linked group (s) being selected from monocarboxylic acid esters, and (b) a polymeric material which is capable of cross- linking and/or reacting with cellulose, wherein the polymeric material is selected from the group consisting of polymeric material comprising one or more poly (oxyalkylene) groups having an end group which comprises one or more amino groups or derivatives of said amino groups, and cationic polymers which are amine- or amide- epichlorohydrin resins or derivatives thereof.
2. 2. A composition according to claim 1, wherein the rebuild agent is selected from one or more materials of general formula (I) :-

   wherein at least one or more R groups of the polymer are independently selected from groups of formulae:-

   wherein each R1 is independently selected from C1_20 (preferably C1_6)alkyl, C2_20 (preferably C2_6) alkenyl (e.g. vinyl) and CS_7 aryl (e.g. phenyl) any of which is 'optionally substituted by one or more substituents independently selected from C1_4 alkyl, C1_12 (preferably C1_4) alkoxy, hydroxyl, vinyl and phenyl groups; and each R2 is independently hydrogen or a group R1 as hereinbefore defined.
3. 3. A composition according to any preceding claim, wherein the polymeric backbone comprises cellulose units or other P-1,4 linked polysaccharide units.
4. 4. A composition according to claim 3, wherein the average degree of substitution of the total of all groups on the saccharide rings is from 0.4 to 3, preferably from 0.4 to 1, more preferably from 0.5 to 0.75, most preferably from 0.6 to 0.7.
5. 5. A laundry treatment composition comprising: (a) a water-soluble or water-dispersible rebuild agent for deposition onto a fabric during a treatment process wherein the rebuild agent undergoes during the treatment process, a chemical change by which change the affinity of the rebuild agent for the fabric is increased, the chemical change occurring in or to a group or groups covalently bonded to be pendant on a polymeric backbone of the rebuild agent and which backbone comprises cellulose units or other P-1,4 linked polysaccharide units, the average degree of substitution of the total of a11 groups pendant on the saccharide rings of the backbone being from 0.3 to 3, preferably from 0.4 to 1, more preferably from 0.5 to 0.75, most preferably from 0.6 to 0.7, and (b) a polymeric material which is capable of cross- linking and/or reacting with cellulose, wherein the polymeric material is selected from the group consisting of polymeric material comprising one or more poly (oxyalkylene) groups having an end group which comprises one or more amino groups or derivatives of said amino groups, and cationic polymers which are amine- or amide- epichlorohydrin resins or derivatives thereof.
6. 6. A composition according to claim 5, wherein the chemical change is lysis, for example hydrolysis or perhydrolysis, or bond-cleavage, optionally catalysed by an enzyme or another catalyst.
7. 7. A composition according to either claim 5 or claim 6, wherein the chemical change is not protonation or deprotonation.
8. 8. A composition according to any of claims 5-7, wherein the pendant group (s) comprise one or more groups attached via a respective linkage independently selected from ester, carbamate, urea and silyl linkages to the polymeric backbone.
9. 9. A composition according to any of claim 5-8, wherein the rebuild agent is selected from one or more molecules of formula (II):-

   wherein at least one or more R groups of the polymer are independently selected from groups of formulae:-

   wherein each R1 is independently selected from C1_20 (preferably C1_6) alkyl, C2_20 (preferably C2_6) alkenyl (e.g. vinyl) and C5_, aryl (e.g. phenyl) any of which is optionally substituted by one or more substituents independently selected from C1_4 alkyl, C1_12 (preferably C1_4) alkoxy, hydroxyl, vinyl and phenyl groups; each R2 is independently selected from hydrogen and groups R1 as hereinbefore defined; R3 is a bond or is selected from C1_4 alkylene, C2_4 alkenylene and CS-7 arylene (e.g. phenylene) groups, the carbon atoms in any of these being optionally substituted by one or more substituents independently selected from C1_12 (preferably C1_4) alkoxy, vinyl, hydroxyl, halo and amine groups; each R4 is independently selected from hydrogen, counter cations such as alkali metal (preferably Na) or

   or

   and groups R1 as hereinbefore defined; wherein each RS is independently selected from the group consisting of H, Cl-C20 alkyl, C5-C7 cycloalkyl, C7-C20 arylalkyl, C,-C20 alkylaryl, substituted alkyl, hydroxyalkyl, (R6) 2N-alkyl, and (R6) 3N-alkyl, where R6 is independently selected from the group consisting of H, Cl-C20 alkyl, CS-C, cycloalkyl, C7-C20 arylalkyl, C7-C20 alkylaryl, aminoalkyl, alkylaminoalkyl, dialkylaminoalkyl, piperidinoalkyl, morpholinoalkyl, cycloaminoalkyl and hydroxyalkyl; and groups R which together with the oxygen atom forming the linkage to the respective saccharide ring forms an ester or hemi-ester group of a tricarboxylic- or higher polycarboxylic- or other complex acid such as citric acid, an amino acid, a synthetic amino acid analogue or a protein.
10. 10. A composition according to any of claims 5-9, wherein at least some of the groups which undergo the chemical change are selected from one or more independently selected methane sulphonate and toluene sulphonate groups and hemiester groups of fumaric, malonic, itaconic, oxalic, malefic, succinic, tartaric, glutamic, aspartic and malic acids.
11. 11. A composition according to any preceding claim, wherein the groups which undergo the chemical change are independently selected from one or more of acetate, propanoate, trifluoroacetate, 2-(2-hydroxy-l-oxopropoxy) propanoate, lactate, glycolate, pyruvate, crotonate, isovalerate, cinnamate, formate, salicylate, carbamate, methylcarbamate, benzoate and gluconate groups.
12. 12. A composition according to any preceding claim, wherein the rebuild agent comprises cellulose monoacetate.
13. 13. A composition according to any preceding claim, which further comprises a surfactant.
14. 14. A composition according to any preceding claim, comprising from<B>0.005%</B> to 250, preferably from<B>0.01%</B> to 10%, more preferably from<B>0.025%</B> to 2.5% by weight of the rebuild agent.
15. 15. A composition according to any preceding claim, wherein the amine- or amide- epichlorohydrin resin has one or more functional groups capable of forming azetidinium groups.
16. 16. A composition according to claim 15, wherein the amine- or amide- epichlorohydrin resin has one or more azetidinium functional groups.
17. 17. A composition according to any of claims 1-14., wherein the amine- or amide- epichlorohydrin resin or derivative thereof has one or more functional groups that contain epoxide groups or derivatives thereof.
18. 18. A composition according to any preceding claim, in which the composition further comprises a silicone component.
19. 19. A composition according to any of claims 15-18, wherein the amine- or amide- epichlorohydrin or derivative thereof is present in the composition in an amount such that from 0.0005% to 5% by weight on weight fabric is provided.