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0342997
EUROPEAN PATENT SPECIFICATION
B1
19940810
EP
89305082.3
19890519
19900717
19930518
19971001
en
en
en
8811953
19880520
GB
19940810
199432
19891123
198947
19940810
199432
19930906
5
5C 11D 1/835 A
5C 11D 3/37 B
de
Allzweckreinigerzusammensetzungen
en
General-purpose cleaning compositions
fr
Compositions de nettoyage à usage général
EP-A- 0 197 649
GB-A- 2 164 657
CHEMICAL ABSTRACTS, vol. 103, no. 8, August 1985, abstract no. 55735u,Columbus, Ohio, US; & JP-A-60 51 796
Rennie, George Kerr
26 Spital Road Bebington Wirral
Merseyside L63 9JF
GB
Bernardi, Paolo
Via Sassi 6
I-20090 Vimodrone Milan
IT
UNILEVER PLC
00200923
Unilever House Blackfriars
London EC4P 4BQ
GB
GB
UNILEVER N.V.
00200916
Weena 455
3013 AL Rotterdam
NL
CH
DE
ES
FR
IT
LI
NL
SE
Elliott, Peter William
et al
00062982
Unilever plc Patent Division Colworth House Sharnbrook
Bedford MK44 1LQ
GB
CH
DE
ES
FR
GB
IT
LI
NL
SE
19900502
199018
The present invention relates to general-purpose cleaning compositions with improved properties. More particularly, it relates to general-purpose cleaning compositions which have a sanitizing effect and a streak-free cleaning benefit.
General-purpose cleaning compositions are compositions which are intended for use in the cleaning of hard surfaces, such as tiles, walls, floors, kitchen furniture, glass, plastic/covered doors, etc. Such general-purpose cleaning compositions are well known in the art and have found substantial commercial use.
These compositions are usually provided in the form of a particulate composition, from which the user prepares an aqueous solution, or in the form of a liquid composition which contains a suitable solvent, such as water, or a mixture of these. These liquids can be applied either neat for the removal of stubborn stains, or in the form of a more diluted solution for large surface area cleaning.
However, despite the fact that many of such general-purpose cleaning compositions often satisfactorily remove soil and dirt from hard surfaces, they often leave behind residues once the solvent medium has evaporated during the drying of the cleaned surface. The surface presents residues, visible as dull streaks, instead of the bright, shining surface that the consumer wants to see.
It is therefore an object of the present invention to provide general-purpose cleaning compositions with a "streak-free" cleaning benefit, i.e. after cleaning a hard surface with such a cleaning composition, the hard surface, when dry, does not show a residue in the form of visible, dull streaks to any significant degree.
For brevity's sake, such a cleaning composition will hereafter be called a streak-free, general-purpose cleaning composition, "streak-free" being understood as described hereabove.
Frequently, an important aspect of general-purpose cleaners is that they should not only satisfactorily clean hard surfaces, but also sanitize the hard surfaces to render them hygienic. This has been recognized in the art, and many proposals concerning such cleaning compositions, often referred to as detergent sanitizers, have been made (see e.g. "Surface Active Ethylene Oxide Adducts" by N.Schonfeldt, Pergamon Press, 1969, pages 439-441). Such compositions are mainly based on a mixture of nonionic and cationic detergent surfactants although cationic alone can be used.
A disadvantage of such detergent sanitizers based on a mixture of nonionic and cationic detergent surfactants is that they frequently give rise to streak formation on the surface when dry, which, as explained above, is unattractive to the consumer.
It is therefore an object of the present invention to provide a general-purpose cleaner having a sanitizing effect, containing a mixture of a nonionic and a non-anionic detergent surfactant, which also provides a streak-free cleaning benefit.
In our European Patent 0 066 342, published on 30 December 1986, we have described and claimed a streak-free, general purpose cleaning composition comprising a nonionic detergent surfactant and an at least partially alcohol-esterified resin. However, the inclusion of such partially esterified resins in a composition which also contains a cationic detergent surfactant does not provide a streak-free benefit, but can rather give rise to worse streak formation.
EP-A-197649 discloses aqueous liquid cleansing compositions containing 8% to 50% of a primary surfactant selected from anionic, cationic, zwitterionic and amphoteric surfactants, from 0.1% to 6% of a nonionic surfactant and from 0.1% to 2% of a water-soluble polymeric thickening agent. The document is concerned primarily with cleansers for cleaning skin, although it states that it is not limited to that application. In its examples the primary surfactant is anionic.
We have now surprisingly found that the inclusion of a non-anionic polymer in general purpose cleaners which contain a mixture of a nonionic and a cationic detergent surfactant significantly reduces streak formation and can also provide an improved cleaning benefit.
This invention accordingly provides a general purpose cleaning composition comprising:
- (a) 0.1 to 30% by weight of a nonionic surfactant;
- (b) 0.005 to 5% by weight of a cationic detergent surfactant which has a sanitising action;
- (c) 0.003 to 20% by weight of a non-anionic polymer which has an adsorptive affinity to hard surfaces.
The nonionic detergent surfactant used in the present invention can be any suitable type of nonionic detergent known. Basically, nonionic detergent surfactants consist of a hydrophobic moiety, such as a C_a-C_{20} fatty acid amide, and a hydrophilic moiety which consists of alkylene oxide units. These nonionic detergent surfactants are, for instance, alkoxylation products of the above hydrophobic moieties containing from 2 to 30 moles of alkylene oxide. As alkylene oxides, ethylene, propylene and butylene oxides and mixtures thereof are used.
Typical examples of such nonionic detergents are C9-C11 primary, straight chain alcohols condensed with from 4-9 moles of ethylene oxide, C_{12}-Cl5 primary straight chain alcohols condensed with 6-12 moles of ethylene oxide, or with 7-9 moles of a mixture of ethylene oxide and propylene oxide, C_{11}-C_{15} secondary alcohols condensed with from 3-15 moles of ethylene oxide, and C_{10}-C_{18} fatty acid diethanolamides. Further examples of nonionic detergent surfactants may be found in M.Schick's textbook "Nonionic Surfactants", M.Dekker Inc., New York, 1967. Mixtures of various nonionic surfactants may also be used. Tertiary amine oxides, such as higher alkyl di(lower alkyl) amine oxides, e.g. lauryl dihydroxyethyl amine oxide, may also be used as a suitable nonionic surfactant.
Nonionic detergent surfactants known in the art as "topped" or "peaked" nonionic detergent surfactants are also useful in the present invention. Topped nonionic detergent surfactants can be made by subjecting the usual nonionic detergent surfactant to a steam distillation treatment, by which the free and low alkoxylated alcohol can be removed, and peaked nonionic detergent surfactants can be made by carrying out the alkoxylation with special catalysts, which results in products with a much sharper peak in the alkoxylate distribution. Topped nonionic detergent surfactants are e.g. described in US Patent Specification 3 682 849.
Topped or peaked nonionic detergent surfactants suitable for the present invention contain an average number of alkylene oxide units of between 3 and 15, preferably between 4 and 12, per molecule of the hydrophobic moiety, i.e. a C_6-C_{18} primary or secondary, straight or branched chain alcohol, and preferably contain less than 2% by weight of non-alkoxylated alcohol, and less than 4% by weight of mono-alkoxylated alcohol. Particularly suitable are nonionic detergent surfactants with these specifications and prepared from C_{11}-C_{15} linear primary alcohols condensed with 7-11 moles of ethylene oxide, C_9-C_{11} oxo-alcohols condensed with 5 moles of ethylene oxide, and C_6-C_{10 o}linear primary alcohols condensed with 4-5 moles of ethylene oxide.
For optimum detergency, the shorter alkyl chain length nonionic surfactants are preferred, particularly when the degree of alkoxylation is relatively low. Thus, the alkoxylated C_9-C_{11} alcohols are preferred to the correspondingly alkoxylated C, 2-C, _5 alcohols, and the C_9-C_{11} alcohols condensed with 5 moles of ethylene oxide are preferred to the same alcohols but condensed with 8 moles of ethylene oxide.
In general, when dissolved in water, the HLB-value of the nonionic surfactant or mixture of nonionic surfactants should lie between 10 and 15. Nonionic surfactants with an HLB-value of below 11 are generally not soluble in water to any appreciable extent without another active detergent present, but it is possible to dissolve higher levels of such low HLB-nonionic surfactants in mixtures of water and an organic solvent.
For optimum streak-free results, the nonionic surfactant should preferably provide a cloud point of the aqueous solution of the final composition above the temperature of normal use of the diluted solution.
This can be achieved by a proper choice of the type of nonionic surfactant or mixtures of various nonionic surfactants or by the co-use of another detergent surfactant, such as an anionic or amphoteric surfactant.
From 0.1 to 30% by weight with respect to the final composition of one or more nonionic surfactants will be present in the final composition. Usually, it has been found that at least 1% should be present to obtain an improved cleaning effect as well as reduced streaking. Preferably therefore, the amount of nonionic detergent surfactant will range from 1% to 30%, and especially preferably from 1% to 10% by weight of the final composition.
The cationic detergent surfactant to be used in the present invention can be any cationic detergent surfactant with a sanitizing action well known in the art. Examples of such cationic detergent surfactants are the quaternary ammonium compounds, such as the mono- long chain alkyl tri- short chain alkyl quaternary ammonium salts; mono-long chain alkyl imidazolinium compounds; substituted long chain alkyl polyamine salts; alkyl pyridinium salts and so on. Further suitable examples can be found in Schwartz, Perry and Berch, Vol.lI (1958), "Surface-active Agents and Detergents" under the heading "Cationic Surface Active Agents".
Specific examples of suitable cationic detergent surfactants are the long chain (C_8 and higher) alkyldimethylbenzylammonium chlorides (e.g. the commercial product Dodigen ex American Hoechst Corp.), the alkyl (C_{12} and higher) trimethylammonium chloride, tetradecyl pyridinium chloride, alkyl (C12-C,_6) trimethylammonium bromide, di-isobutyl-phenoxy- ethoxyethyl dimethylbenzylammonium chloride. Quaternary phosphonium and sulphonium compounds can also be used. These examples are, however, not limiting the scope of the invention; other detergent surfactants with a sanitizing action can be suitably used.
In general, the amount of cationic detergent surfactant used in the present invention ranges from 0.005 to 50%, usually from 0.1 to 15%, and preferably from 0.25 to 5% by weight.
The non-anionic polymer to be used in the present invention should have an adsorptive affinity to the hard surface and should be hydrophilic. Preferably, it should bear a positive charge on its molecular structure (either as such or under the conditions of use), and consequently cationic polymers are clearly preferred to nonionic polymers.
Suitable cationic polymers for use in the present invention are those which adsorb on to the hard surface at least as quickly as, and preferably, more quickly than, the cationic detergent surfactant.
Typical examples of such cationic polymers are Busan 77 (ex Buckman) which is a poly[oxyethylene (dimethyliminio) ethylene (dimethyliminio) ethylene dichloride] with a polymerization degree of about 20, Busan 79 (ex Buckman) which is a poly [hydroxy-ethylene (dimethyliminio) ethylene (dimethyliminio) methylene dichloride], Busan 1055 (ex Buckman) which is a poly[2-hydroxyethylenedimethyliminio-2-hydroxypropylenedimethyliminio methylene) dichloride and structurally related cationic polymers such as 4/polyethylene glycol lonene bromides where the molecular weights of the PEG portion are 6000 and 1500 respectively, Zetag 57 and Zetag 87 which are high molecular weight cationic acylamides ex Allied Colloids, Merquat 100 which is a polydimethyldiallylammonium chloride ex Merck, Mirapol A15 which is a poly[N-(3-dimethylammonio)propyl[-N [3-(ethyl-eneoxyethylene dimethylammonio)propyl] urea dichloride with a polymerisation degree of about 6 and homopolymer 78-4396 ex National Starch which is poly(dimethyldiallyl ammonium chloride).
Particularly preferred cationic polymers for use in the present invention are Busan 77 (ex Buckman) Merquat 100 (ex Merck) and Mirapol A15 (ex Miranol).
Examples of suitable nonionic polymers are Jaguar HP 8 and HP60 (ex Meyhall), which are nonionic substituted hydroxypropyl guar gums, and polyvinylpyrrolidones and poly(2-vinylpyridines) which are especially suitable for very low pH compositions. However, as said above, the cationic polymers are clearly preferred to the nonionic polymers.
It has been found that contact angle measurements may provide a guide as to the suitability of non-anionic polymers for use in the composition. In particular low contact angles are an indication of suitability. The contact angle is measured as the receding angle of a drop of water (approximately 0.4cm^3 forced to spread by tilting movements on a horizontal black ceramic tile which has been previously treated with a formulation comprising 1.5% C_8-C_{18} alkyldimethylbenzylammonium chloride, 1.2% C11 alkyl polyoxyethylene (3EO), 0.6% C_a-C_n linear alcohol condensed with 5 moles of ethylene oxide and 0.8% by weight of the non-anionic polymer, and then allowed to dry. Preferably the non-anionic polymers have contact angles of less than 15 and more preferably less than 100. However, such measurements can only be used as a guide. Some polymers moreover are not soluble at the levels of the above test and yet still give a streak free benefit.
A more reliable guide to suitable non-anionic polymers is provided by an adsorption test which, by way of surface tension measurements, determines the adsorptive affinity of the non-anionic polymer compared to that of a typical cationic surfactant when the components are in competition for an "ideal" surface such as colloidal silica. The adsorption test comprises the following steps:
- (i) 10g of a 0.015% solution of the cationic surfactant cetyltrimethyl ammonium bromide (CTAB) is placed in a tensiometer vessel and equilibrated to 25 ° C. The surface tension is measured.
- (ii) 100 microlitres of a 1% solution in distilled water of the non-anionic polymer is pipetted into the CTAB solution and mixed thoroughly. The surface tension is measured again.
- (iii)30 microlitres of an aqueous colloidal silica solution (Ludox HS-40) is pipetted into the solution and mixed thoroughly. The surface tension is then measured at timed intervals.
The quantity of silica added is chosen so that the non-anionic polymer and the surfactant must compete for adsorption sites. It has been found that the preferred cationic polymers according to the invention cause a less than 15 dyne change in surface tension when tested according to the adsorption test defined above, particularly preferred cationic polymers cause a less than 10 dyne change in surface tension according to the adsorption test.
The amount of non-anionic polymer in the compositions of the invention may range from 0.003 to 20%, usually from 0.01 to 15%, and preferably from 0.1 to 5% by weight.
It has been found that particularly preferred formulations of the invention have ratios of cationic surfactant: non-anionic polymer within the range 150:1 to 0.3:1 and most preferably 15:1 to 1:2.
The compositions may furthermore contain optional ingredients, such as preservatives, bactericides, bleaching agents, enzymes, thickening agents, colouring agents, perfumes, alkaline materials, sequestering agents, solvents and the like. They may also contain particulate abrasive, such as particulate calcite, to form an abrasive cleaning composition. They may be made in any physical form, such as powders, blocks, aqueous and non-aqueous liquids etc. Preferably, they are in liquid form, the balance of the formulation being an aqueous or non-aqueous medium. They may be applied as such, i.e. neat, or they may be made up into a solution before use to a concentration of generally 0.1 to 10%.
In general the streak-free benefit is independent of the pH of the composition. An exception is a polymer such as poly(2-vinylpyridine) in which case a composition of very low pH is necessary for optimum streak-free results to be obtained.
The invention will further be illustrated by way of Example.

EXAMPLE 1
The streak-free benefits of cationic polymers were tested as follows:
- 1. A solution of 0.5-1 % of polymer in an aqueous liquid containing 1.5% (C_{12}-C_{16}) alkylbenzyldimethyl ammonium chloride, 4% nonylphenol condensed with 8.5 moles of ethylene oxide, 0.3% perfume, balance water is prepared.
- 2. A quarter of a sponge cloth is cut; it is rinsed with plenty of tap water of average hardness (ca. 12 degrees French Hard) and then gently squeezed.
- 3. Ten drops of the solution are dropped on the sponge cloth.
- 4. A single black ceramic tile is washed with this sponge and, after rinsing the sponge cloth, wiped again.
- 5. Then the tile is left to dry naturally.
The streak-free benefit is then assessed visually. The following results were obtained:

EXAMPLE 2
The following formulation containing:
- 1.5% C_{12}-C_{16} alkyldimethyl benzyl ammonium chloride
- 1.2% C_{1 1}-C_{13} oxo-alcohol condensed with 3 moles of ethylene oxide
- 0.6% C_9-C_{11} linear alcohol condensed with 5 moles of ethylene oxide
- q.s. water
- also containing
- 0.6% (A) or 0.9% (D) Busan 77, or 0.6% (C) resp. 0.8% (B) Merquat 100
- was tested and compared with the formulation of Example 1 (without polymer) as control.
The following results were obtained.
- a. Soil removal (triolein + carbon black)
- b. Streaking diluted in hard water (40 ° FH) neat test 45 ° C
- c. Logarithm of bacteria survivors in solutions (1:20 dil.) (solution containing 10^7 bacteria/cm^3)
- d. Logarithm of bacteria survivors on cloth (1:10 dil.) (dish cloths contaminated, contacted for 30 seconds with the solution)

EXAMPLE 3
The following formulation is a liquid abrasive cleaning composition with an improved streak-free benefit.

EXAMPLE 4
The adsorptive affinity of a range of non-anionic polymers was determined by the following adsorption test.

Adsorption test method
The adsorption test comprises the following steps:
- (i) 10g of a 0.015% solution of the cationic surfactant CTAB is placed in a tensiometer vessel and equilibrated to 25 ° C. The surface tension is measured as approximately 51 dynes.
- (ii) 100 microlitres of a 1% solution in distilled water of the non-anionic polymer is pipetted into the CTAB solution and mixed thoroughly. The surface tension is again measured. A value close to 51 dynes suggests that any interaction between the polymer and the surfactant is negligible.
- (iii)30 microlitres of an aqueous colloidal silica solution (Ludox HS-40) are pipetted into the solution and mixed thoroughly. The surface tension is then measured at timed intervals.
The non-anionic polymer from (ii) above was then incorporated in the following composition.
- 1.5% Alkyl (C_8-C_{18}) benzyldimethylammonium chloride
- 1.2% Alkyl (C11) polyoxyethylene (3EO)
- 0.6% Alkyl (C_9 -C_{11}) polyoxyethylene (5EO)
- 0.8% Non-anionic polymer
- balance water to 100%
The formulation was tested both neat and dilute as follows:
- (a) Neat: 2g of the formulation were placed on a clean folded sponge cloth and wiped over a clean, dry, vertical, black ceramic tile board. The cloth was then rinsed in demineralised water and the board wiped again before being left to dry naturally.
- (b) Dilute: 4g of the formulation were diluted to 400g using 40 ° FH water at 45 ° C. A clean folded sponge cloth was immersed in the liquid, squeezed gently and wiped over the tile board. The cloth was then re- immersed, squeezed until damp and wiped over the tile board. The board was left to dry naturally.
The following results were obtained:
None of the above polymers showed surface activity when added to distilled water. Little or no change in surface activity resulted from the addition of polymer to surfactant (i.e. little or no change in surface tension from step (i) to step (ii). The results of the adsorption test correlate well with the streak free benefit for cationic polymers having a change in surface tension (when silica is added to a solution comprising surfactant and polymer according to the adsorption test as define above) of less than about 15 dynes and preferably less than about 8 dynes.
1. A general purpose cleaning composition comprising:
(a) 0.1 to 30% by weight of a nonionic surfactant;
(b) 0.005 to 5% by weight of a cationic detergent surfactant which has a sanitising action;
(c) 0.003 to 20% by weight of a non-anionic polymer which has an adsorptive affinity to hard surfaces.
2. A composition as claimed in claim 1 wherein the non-anionic polymer (c) is a cationic polymer.
3. A composition as claimed in claim 1 or claim 2 wherein the nonionic surfactant is a topped nonionic.
4. A composition as claimed in any preceding claim wherein the composition comprises from 1 to 10% by weight of (a).
5. A composition as claimed in any preceding claim wherein the composition comprises from 0.1 to 5% by weight of (b).
6. A composition as claimed in any preceding claim wherein the composition comprises from 0.01 to 15% by weight of (c).
7. A composition as claimed in claim 2 wherein the cationic polymer (c) has a change in surface tension of less than 15 dynes when measured according to an adsorption test as hereinbefore defined.
8. A composition as claimed in claim 7 wherein the cationic polymer (c) has a change in surface tension of less than 8 dynes when measured according to the adsorption test.
9. A composition as claimed in any preceding claim wherein the contact angle of a drop of water on a surface previously treated with the formulation of Example 2 comprising 0.8% by weight of (c) is less than 10°.
10. A general purpose cleaning composition comprising;
(a) 1 to 10% by weight of a nonionic surfactant;
(b) 0.25 to 5% by weight of a cationic detergent surfactant which has a sanitising action;
(c) 0.1 to 5% by weight of a non-anionic polymer which has an adsorptive affinity to hard surfaces.
11. A composition according to any one of the preceding claims wherein the cationic detergent surfactant contains not more than one alkyl group with eight or more carbon atoms therein.
1. Allzweckreinigerzusammensetzung enthaltend
(a) 0.1 bis 30 Gew.% eines nichtionischen Tensids;
(b) 0.005 bis 5 Gew.% eines kationischen Reinigungstensids, das eine desinfizierende Wirkung besitzt;
(c) 0.003 bis 20 Gew.% eines nicht-anionischen Polymers, das eine adsorptive Affinität zu harten Oberflächen besitzt.
2. Zusammensetzung nach Anspruch 1, worin das nicht-anionische Polymer (c) ein kationisches Polymer ist.
3. Zusammensetzung nach Anspruch 1 oder Anspruch 2, worin das nichtionische Tensid ein getopptes nichtionisches Tensid ist.
4. Zusammensetzung nach einem der vorhergehenden Ansprüche, worin die Zusammensetzung 1 bis 10 Gew.% von (a) enthält.
5. Zusammensetzung nach einem der vorhergehenden Ansprüche, worin die Zusammensetzung 0.1 bis 5 Gew.% von (b) enthält.
6. Zusammensetzung nach einem der vorhergehenden Ansprüche, worin die Zusammensetzung 0.01 bis 15 Gew.% von (c) enthält.
7. Zusammensetzung nach Anspruch 2, worin das kationische Polymer (c) eine Änderung der Oberflächenspannung von weniger als 15 Dyn aufweist, wenn gemessen gemäß einem vorstehend beschriebenen Adsorptionstest.
8. Zusammensetzung nach Anspruch 7, worin das kationische Polymer (c) eine Änderung der Oberflächenspannung von weniger als 8 Dyn aufweist, wenn gemessen gemäß dem Adsorptionstest.
9. Zusammensetzung nach einem der vorhergehenden Ansprüche, worin der Randwinkel eines Wassertropfens an der Oberfläche, die vorgängig mit der Formulierung von Beispiel 2, enthaltend 0.8 Gew.% von (c), behandelt wurde, geringer als 10 ist.
10. Allzweckreinigerzusammensetzung, enthaltend:
(a) 1 bis 10 Gew.% eines nichtionischen Tensids;
(b) 0.25 bis 5 Gew.% eines kationischen Reinigungstensids, das eine desinfizierende Wirkung besitzt;
(c) 0.1 bis 5 Gew.% eines nicht-anionischen Polymers, das eine adsorptive Affinität zu harten Oberflächen besitzt.
11. Zusammensetzung nach einem der vorhergehenden Ansprüche, worin das kationische Reinigungstensid nicht mehr als eine Alkylgruppe mit acht oder mehr Kohlenstoffatomen enthält.
1. Une composition de nettoyage à usage général contenant :
(a) 0,1 à 30 % en masse d'un agent tensioactif non ionique;
(b) 0,005 à 5 % en masse d'un agent tensioactif détergent cationique présentant un pouvoir d'assainissement;
(c) 0,003 à 20 % en masse d'un polymère non anionique présentant une affinité adsorbante avec les surfaces dures.
2. Une composition selon la Revendication 1, dans laquelle le polymère non anionique (c) est un polymère cationique.
3. Une composition selon la Revendication 1 ou la Revendication 2, dans laquelle l'agent tensioactif non ionique est un agent tensioactif non ionique primaire.
4. Une composition selon l'une quelconque des Revendications précédentes, dans laquelle la composition contient 1 à 10 % en masse de (a).
5. Une composition selon l'une quelconque des Revendications précédentes, dans laquelle la composition contient 0,1 à 5 % en masse de (b).
6. Une composition selon l'une quelconque des Revendications précédentes, dans laquelle la composition contient 0,01 à 15 % en masse de (c).
7. Une composition selon la Revendication 2, dans laquelle le polymère cationique (c) présente une modification de tension de surface inférieure à 15 dynes lorsqu'elle est mesurée selon un test d'adsorption tel que défini ci-avant.
8. Une composition selon la Revendication 7, dans laquelle le polymère cationique (c) présente une modification de tension de surface inférieure à 8 dynes lorsqu'elle est mesurée selon le test d'adsorption.
9. Une composition selon l'une quelconque des Revendications précédentes, dans laquelle l'angle de contact d'une goutte d'eau sur une surface traitée au préalable avec la formulation de l'Exemple 2 contenant 0,8 % en masse de (c) est inférieur à 100.
10. Une composition de nettoyage à usage général contenant;
(a) 1 à 10 % en masse d'un agent tensioactif non ionique;
(b) 0,25 à 5 % en masse d'un agent tensioactif détergent cationique présentant un pouvoir d'assainissement;
(c) 0,1 à 5 % en masse d'un polymère non anionique présentant une affinité adsorbante avec les surfaces dures.
11. Une composition selon l'une quelconque des Revendications précédentes, dans laquelle l'agent tensioactif détergent cationique ne contient pas plus d'un groupe alkyle contenant 8 atomes de carbone, ou plus.