EP1366083A2

EP1366083A2 - Composition based on nanoparticles or nanolatex of polymers for treating linen

Info

Publication number: EP1366083A2
Application number: EP01963116A
Authority: EP
Inventors: Eric Aubay; Marie-Pierre Labeau; Ian Harrison
Original assignee: Rhodia Chimie SAS
Current assignee: Procter and Gamble Co
Priority date: 2000-08-25
Filing date: 2001-08-22
Publication date: 2003-12-03
Also published as: KR20030029147A; JP2004512431A; FR2813313B1; US20040038851A1; US7071156B2; WO2002018451A2; AR030477A1; CA2420351A1; WO2002018451A3; US20090165216A1; US20060211594A1; FR2813313A1; AU2001284151A1; BR0113381A; US20020065208A1

Abstract

The invention concerns the use, in a composition for treating linen in aqueous or wet medium, of nanoparticles in at least a polymer (P) or at least a nanolatex of at least a polymer (P) non-soluble in conditions of use in aqueous or wet medium of said composition, as anti-crease and/or ironing-assist agent. Said composition can be a formulation of solid or liquid detergent, a liquid rinsing and/or a softening formulation, a drying additive contacted with the wet linen in a dryer, an aqueous ironing formulation, a prespotter deposited on the dry linen prior to a washing operation.

Description

COMPOSITION BASED ON NANOPARTICLES OR NANOLATEX OF POLYMERS FOR THE TREATMENT OF LAUNDRY

The subject of the present invention is the use, in a composition for the treatment of linen based on cotton in particular, of polymer nanoparticles or of a polymer nanolatex which is not soluble under the conditions of direct and / or indirect use in medium aqueous or wet of said composition, as an anti-crease or ironing aid for said laundry. It is known (FR-A-1,416,813) to pretreat (by padding, spraying or brushing) before use the fibers or textile fibrous articles (carpets, fabrics) using a composition comprising a latex of polystyrene or styrene copolymer with a (meth) acrylic ester or (meth) acrylic acid comprising a betaine as an emulsifying agent; the purpose of this pretreatment is to prevent or reduce the soiling of the articles and to provide a matt finish.

It has also been proposed (US-A-4,746,455) to use in liquid detergent compositions latexes of nonionic polymers or of copolymers derived from nonionic monomers and optionally from cationic and / or anionic monomers, as antifeutrage.

The latexes of crosslinked copolymers of styrene and of nonionic and anionic monomers are also known as opacifying agents for liquid detergent compositions (US-A-3,340,217).

Cleaning in a washing machine machine involves a spinning operation which results in a crumpled cloth which is accentuated during drying, in particular by the formation of inter-fiber hydrogen bonds. An ironing operation is therefore necessary to obtain a presentable appearance of the laundry.

The Applicant has found that the use, in compositions for the treatment of linen, in particular cotton-based, of nanoparticles or nanolatex of insoluble polymers brings to the latter anti-creasing properties or facilitates the ironing thereof. .

Such compositions may in particular be compositions for washing and / or rinsing and / or softening the laundry, for detaching the laundry before washing ("prespotting"), for drying wet laundry in a dryer or for ironing clothes.

By polymer nanoparticles is meant, according to the invention, particles with a diameter of the order of 10 to 500 nm, preferably preferably from 20 to 300 nm, very particularly from 20 to 100 nm, even more particularly from 20 to 50 nm.

By polymer nanolatex is meant a stable aqueous dispersion of solid polymer nanoparticles having an average size of the order of 10 to 500 nm, preferably preferably from 20 to 300 nm, very particularly from 20 to 100 nm, even more particularly from 20 to 50 nm.

Such a dispersion generally has a dry extract of the order of 10 to 50% by weight, preferably of the order of 20 to 40% by weight.

A first object of the invention consists in the use, in a composition for the treatment of linen in an aqueous or humid medium, of nanoparticles made of at least one polymer (P) or of at least one nanolatex of at least one polymer (P) not soluble under the conditions of use ("working conditions") in aqueous or wet medium of said composition, as an anti-creasing agent and / or an ironing aid. A second object of the invention consists of a process for bringing anti-creasing properties to the laundry and / or for facilitating ironing thereof, by treatment of the latter using a composition, in an aqueous medium or wet, comprising nanoparticles of at least one polymer

(P) or at least one nanolatex of at least one polymer (P) which is not soluble in said medium.

The form of the composition and the conditions of use (or treatment) can be multiple.

Said composition can be presented

* in the form of a solid (powder, granules, tablets, etc.) or a concentrated aqueous dispersion, brought into contact with the linen to be treated, after dilution in water;

* in the form of a concentrated dispersion previously deposited on the dry linen to be treated before dilution in water;

* in the form of an aqueous dispersion to be deposited directly on the dry linen to be treated without dilution or of a solid support (stick) comprising said nanoparticles or said nanolatex, to be applied directly to the dry linen to be treated;

* in the form of an insoluble solid support comprising said nanoparticles or said polymer nanolatex (P) brought into contact directly with the linen to be treated in the wet state.

Thus the composition according to the invention can be: - a solid or liquid detergent formulation capable of directly forming by dilution a detergent bath; - a liquid rinsing and / or softening formulation capable of directly forming, by dilution, a rinsing and or softening bath;

- a solid material, textile in particular, comprising said nanoparticles or said nanolatex, intended to be brought into contact with damp linen in a dryer (said solid material is hereinafter called "drying additive");

- an aqueous ironing formulation;

- a washing additive ("prespotter") intended to be deposited on dry laundry prior to a washing operation using a detergent formulation containing or not containing said nanoparticles or said nanolatex (said additive is called ci- after "washing additive").

The composition according to the invention is particularly well suited to the treatment of linen, in particular cotton-based, in particular containing at least 35% cotton.

Preferably, said polymer (P) has a glass transition temperature Tg of the order of -40 ° C to 150 ° C, preferably of the order of -40 ° C to 100 ° C, very particularly of the order of

-40 ° C to 40 ° C.

The term "polymer" means both a homopolymer and a copolymer derived from two or more monomers. For a good implementation of the invention, said polymer (P) comprises:

- hydrophobic monomer units (N) which are uncharged or non-ionizable at the pH of use of the composition of the invention,

optionally at least one hydrophilic monomer unit (F) chosen from cationic or cationizable monomer units * (F1) at the pH of use of said composition,

* (F2) amphoteric at the pH of use of said composition,

* (F3) anionic or anionizable at the pH of use of said composition,

* (F4) uncharged or non-ionizable, hydrophilic in nature, at the pH of use of said composition, * or their mixtures

- and possibly at least one crosslinking unit (R)

Preferably, said monomer units (N) and (F) are derived from monoethylenically unsaturated α-β monomers.

Preferably, said monomer units (R) are derived from diethylenically unsaturated monomers.

The average molar mass of said polymer (measured by gel permeation chromatography (GPC) THF and expressed in polystyrene equivalents) may preferably be at least 20,000. As examples of monomers from which the hydrophobic units (N) are derived, there may be mentioned:

• vinylaromatic monomers such as styrene, vinyltoluene ...

• alkyl esters of α-β monoethylenically unsaturated acids such as C ₁ -C ₁₀ alkyl acrylates and methacrylates, linear or branched, such as methyl, ethyl, butyl, isobutyl, heptyl, nonyl, methyl acrylates and methacrylates. .

• vinyl or allyl esters of saturated carboxylic acids such as acetates, propionates, vinyl or allyl versatates • monoethylenically unsaturated α-β nitriles such as acrylonitrile ...

• α-olefins, such as ethylene ...

As examples of monomers from which the cationic or cationizable hydrophilic units (F1) are derived, there may be mentioned:

• the N, N (dialkylaminoωalkyl) amides of monoethylenically unsaturated α-β carboxylic acids such as N, N-dimethylaminornethyl acrylamide or methacrylamide, N, N-dimethylaminoethyl acrylamide or methacrylamide, N, N-dimethylamino-3-propyl acrylamide or methacrylamide, N, N-dimethylaminobutyl acrylamide or methacrylamide

• monoethylenically unsaturated α-β aminoesters such as dimethyl aminoethyl methacrylate (DMAM), dimethyl aminopropyl methacrylate, ditertiobutylaminoethylmethacrylate, dipentylaminoethylmethacrylate

• monomers that are precursors of amino functions such as N-vinyl formamide, N-vinyl acetamide, etc. which generate primary amine functions by simple acid or basic hydrolysis. As examples of monomers from which the hydrophilic units are derived

(F2) amphoteric, we can mention:

• N, N-dimethyl-N-methacryloyIoxyethyl-N- (3-sulfopropyl) ammonium sulfobetaine (SPE from RASCHIG), N, N-dimethyl ~ N- (2-methacrylamidoethyl) -N- (3-sulfopropyl) ammonium betaine (SPP from RASCHIG), 1-vinyl-3- (3-sulfopropyl) imidazolidium betaine, 1- (3-sulfopropyl) -2-vinylpyridinium betaine (SPV from RASCHIG),

• derivatives of the quaternization reaction of N (dialkylaminoωalkyl) amides of ethylenically unsaturated α-β carboxylic acids, such as N, N-dimethylaminomethyl acrylamide or methacrylamide, NN-dimethylamino-3-propyl acrylamide or methacrylamide, or amino esters ethylenically unsaturated, such as ditertiobutylaminoethylmethacrylate, dipentylaminoethylmethacrylate, with an alkali metal chloroacetate (sodium in particular) or propane sultone. As examples of monomers from which the anophilic or anionizable hydrophilic units (F3) are derived, there may be mentioned:

• monomers having at least one carboxylic function, such as ethylenically unsaturated α-β carboxylic acids or anhydrides, acrylic, methacrylic, maleic, fumaric, itaconic, N-methacroyl alanine, N-acryloyl-hydroxy-glycine acids and anhydrides and their water-soluble salts

• monomers having at least one sulfate or sulfonate function, such as 2-sulfooxyethyl methacrylate, vinylbenzene sulfonic acid, allyl sulfonic acid, 2-acrylamido-2methylpropane sulfonic, acrylate or sulfoethyl methacrylate, sulfopropyl acrylate or methacrylate and their water-soluble salts

• monomers having at least one phosphonate or phosphate function, such as vinylphosphonic acid, ... the esters of ethylenically unsaturated phosphates such as the phosphates derived from hydroxyethyl methacrylate (Empicryl 6835 from RHODIA) and those derived from polyoxyalkylene methacrylates and their water-soluble salts

• monoethylenically unsaturated α-β monomers precursors of anionic function (s), such as those whose hydrolysis generates carboxylate functions (tert-butyl acrylate, dimethyl aminoethyl acrylate, maleic anhydride, etc.) examples of monomers from which the hydrophilic units (F4) derived from uncharged or non-ionizable compounds may be mentioned:

• hydroxyalkyl esters of ethylenically unsaturated α-β acids such as hydroxyethyl and hydroxypropyl acrylates and methacrylates, etc.

• amides of α-β ethylenically unsaturated acids such as acrylamide, N, N-dimethyl methacrylamide, N-methylolacrylamide ...

• ethylenically unsaturated α-β monomers carrying a water-soluble polyoxyalkylenated segment of the polyethylene oxide type, such as polyethylene oxide α-methacrylates (BISOMER S20W, S10W, ... of

LAPORTE) or α.ω-dimethacrylates, SIPOMER BEM from RHODIA (polyoxyethylene ω-behenyl methacrylate), SIPOMER SEM-25 from RHODIA (polyoxyethylene ω-tristyrylphenyl methacrylate) ...

• ethylenically unsaturated α-β monomers precursors of hydrophilic units or segments such as vinyl acetate which, once polymerized, can be hydrolyzed to generate vinyl alcohol units or polyvinyl alcohol segments • ethylenically unsaturated α-β monomers of the ureido type and in particular the methacrylamido of 2-imidazolidinone ethyl (Sipomer WAM II from RHODIA). Mention may be made, as examples of monomers from which the crosslinking units are derived) (R): divinylbenzene ethylene glycol dimethacrylate allyl methacrylate methylene bis (acrylamide) • glyoxal bis (acrylamide) butadiene.

Said polymers (P) can be obtained in a known manner by radical polymerization in aqueous medium of the ethylenically unsaturated monomers. Said nanolatex can be obtained in particular by radical polymerization in emulsion in water.

Methods for obtaining nanoparticulate latexes of small diameter are described in Colloid Polym. Sci. 266: 462-469 (1988) and in Journal of Colloid and Interface Science. Flight. 89. No 1, September 1982 pages 185 and following. A method of preparing latex of particles of average size less than 100 nm, in particular of average size ranging from 1 to 60 nm, very particularly from 5 to 40 nm is described in EP-A-644 205.

The choice and the relative amounts of the monomer (s) from which the unit (s) (N), (F) and (R) of the polymer (P) are derived are such that said polymer (P) has a glass transition temperature Tg of the of the order of - 40 ° C to 150 ° C, preferably of the order of -40 to 100 ° C, very particularly of the order of -40 to 40 ° C, and remains insoluble under the conditions of use of the composition of the invention.

According to the invention, said polymer (P) is considered to be insoluble when less than 15%, preferably less than 10% of its weight, is soluble in the aqueous or wet medium of use of the composition of the invention, it that is to say in particular under the temperature and pH conditions of said medium.

The pH of use of the composition according to the invention can range from approximately 2 to approximately 12, depending on the desired use. In the case of - a detergent formulation, the pH of the detergent bath is generally of the order of 7 to 11, preferably of 8 to 10.5;

- a rinsing and / or softening formulation, the pH of the rinsing and / or softening bath is generally of the order of 2 to 8; - a drying additive, the pH to be considered is that of residual water, which can be of the order of 2 to 9;

- an aqueous ironing formulation, the pH of said formulation is generally of the order of 5 to 9; - a washing additive ("prespotter"), the pH to be considered is that of the pH of the detergent bath of the following washing operation, namely of the order 7 to 11, preferably from 8 to 10.5.

For a good implementation of the invention, at least 70% of the total mass of said polymer (P) is formed of hydrophobic unit (s) (N). When hydrophilic units (F) are present, these do not preferably represent more than 30% of the total mass of the polymer

(P).

When crosslinking units (R) are present, these generally do not represent more than 20%, preferably not more than 10%, especially not more than 5% of the total mass of the polymer (P).

A first embodiment of the invention consists in the use, in a composition (C1), of nanoparticles or of at least one nanolatex of at least one uncharged or non-ionizable polymer (P1) comprising

• at least 70% of its weight of hydrophobic monomer units (N) • optionally at least 1% of its weight of uncharged or non-ionizable hydrophilic monomer units (F4)

• possibly not more than 20% of its weight of non-charged or non-ionizable cross-linking units (R).

Preferably, according to this first embodiment, said uncharged or non-ionizable polymer (P1) comprises:

• at least 70% of its weight of hydrophobic monomer units (N)

• from 3 to 30% of its weight of uncharged or non-ionizable hydrophilic monomer units (F4)

• possibly not more than 20%, preferably not more than 10% of its weight of crosslinking units (R) uncharged or non-ionizable.

Said uncharged or non-ionizable polymer (P1) can be used in all types of compositions for the treatment of the linen mentioned above, the pH of use of which can range from 2 to 12, namely, detergent formulations, rinse and / or softening formulations, drying additives, aqueous ironing formulations or washing additives.

A second embodiment of the invention consists in the use, in a composition (C2), of nanoparticles or of at least one nanolatex at least one polymer (P2) having anionic or anionizable units and free from cationic or cationizable units, comprising

• at least 70% of its weight of hydrophobic monomer units (N)

• at least 1% of its weight, preferably from 3 to 30% of its weight, very particularly from 1 to 20% of its weight of hydrophilic monomer units

(F3) anionic or anionizable

• possibly not more than 29% of its weight of hydrophilic monomer units (F4) uncharged or non-ionizable.

Said polymer (P2) can be used in compositions for treating laundry of a non-cationic nature, namely, detergent formulations, drying additives, aqueous ironing formulations or washing additives.

A third embodiment of the invention consists in the use, in a composition (C3), of nanoparticles or of at least one nanolatex of at least one polymer (P3) having amphoteric units, comprising

• at least 70% of its weight of hydrophobic monomer units (N)

• at least 0.1% of its weight, preferably not more than 20% of its weight, especially not more than 10% of its weight of amphoteric hydrophilic monomer units (F2) • optionally hydrophilic monomer units (F4) uncharged or non-ionizable

• optionally cationic or cationizable hydrophilic monomer units (F1), all of the hydrophilic monomer units (F) preferably representing at least 1% of the weight of the polymer (P3), and the molar ratio of cationic charges to anionic charges may range from 1/99 to 80/20 depending on the treatment composition sought.

Said polymer (P3) having a molar ratio of cationic charges to anionic charges ranging from 1/99 to 80/20 can be used in drying additives and aqueous ironing formulations.

Said polymer (P3) having a molar ratio of cationic charges to anionic charges ranging from 1/99 to 60/40, preferably from 5/95 to 50/50, can also be used in detergent formulations and additives of washing. A fourth embodiment of the invention consists in the use, in a composition (C4), of nanoparticles or of at least one nanolatex of at least one polymer (P4) having both cationic or cationizable units and anionic or anionizable units, comprising • at least 70% of its weight of hydrophobic monomer units (N)

• cationic or cationizable hydrophilic monomer units (F1)

• anionic or anionizable hydrophilic monomer units (F3)

• optionally hydrophilic monomer units (F2) amphoteric • optionally hydrophilic monomer units (F4) uncharged or non-ionizable, all the hydrophilic monomer units (F) preferably representing at least 1% of the weight of the polymer (P4) , and the molar ratio of cationic charges to anionic charges which can range from 1/99 to 80/20 depending on the treatment composition sought.

Said polymer (P4) having a molar ratio of cationic charges to anionic charges ranging from 1/99 to 80/20 can be used in drying additives and aqueous ironing formulations. Said polymer (P4) having a molar ratio of cationic charges to anionic charges ranging from 1/99 to 60/40, preferably from 5/95 to 50/50, can also be used in detergent formulations and additives of washing.

A fifth embodiment of the invention consists in the use, in a composition (C5), of nanoparticles or of at least one nanolatex of at least one polymer (P5) having cationic or cationizable units and free of anionic or anionizable units, comprising

• at least 70% of its weight of hydrophobic monomer units (N)

• at least 1% of its weight, preferably from 3 to 30% of its weight, very particularly from 1 to 10% of its weight of cationic or cationizable hydrophilic monomer units (F1)

• possibly not more than 20% of its weight of uncharged or non-ionizable hydrophilic monomer units (F4).

Said polymer (P5) can be used in all the types of compositions for the treatment of linen mentioned above, the pH of use of which can range from 2 to 12, namely, detergent formulations, rinse formulations and / or softening, drying additives, aqueous ironing formulations or washing additives.

Most preferably, when the composition (C5) is a detergent composition, the said monomer units (F1) are cationizable units derived from at least one cationizable monomer having a pKa of less than 11, preferably less than 10.5 . As examples of nanoparticles or nanolatex of polymer (P), mention may be made in particular of nanoparticles or nanolatex of copolymers having units derived from

* methyl methacrylate / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid, the glass transition temperature Tg of which can range from

10 ° C to 80 ° C, depending on the composition of said polymer

* methyl methacrylate / ethylene glycol dimethacrylate / methacrylic acid, the glass transition temperature Tg of which can range from 10 ° C to 80 ° C, depending on the composition of the said polymer * styrene / divinylbenzene / methacrylic acid, including the glass transition temperature Tg can range from 100 to 140 ° C, depending on the composition of said polymer

* styrene / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid, the glass transition temperature Tg of which can range from 10 ° C to 80 ° C, depending on the composition of said polymer

* Veova 10 (vinyl C versatate) / methyl methacrylate / butyl acrylate / methacrylic acid, the glass transition temperature Tg can range from 10 ° C to 80 ° C, depending on the composition of said polymer

* methyl methacrylate / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid / N, N-dimethyl-N-methacryloyloxyethyl-N- (3-sulfopropyl) ammonium sulfobetaine (SPE from RASCHIG), whose glass transition temperature Tg can range from 10 ° C to 80 ° C, depending on the composition of said polymer

* methyl methacrylate / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid / vinyl phosphonic acid, the glass transition temperature Tg can range from 10 ° C to 80 ° C, depending on the composition of said polymer

* methyl methacrylate / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid / Empicryl 6835 from RHODIA, whose glass transition temperature Tg can range from 10 ° C to 80 ° C, depending on the composition of said polymer

* styrene / butadiene / acrylic acid whose glass transition temperature Tg can range from -40 ° C to 10 ° C, depending on the composition of said polymer

* butyl acrylate / methacrylic acid, the glass transition temperature Tg can range from -40 ° C to 10 ° C, depending on the composition of said polymer. According to the invention, the amount of nanoparticles or nanolatex of polymer (P) used in the treatment composition can range from 0.05 to 10% by dry weight of the weight of said composition in dry matter, depending on the application. sought. Thus, said polymer (P) can be implemented as follows

Other constituents may be present, alongside the nanoparticles or the nanolatex of polymer (P), in the treatment composition. The nature of these constituents depends on the intended use of said composition.

Thus, when it is a detergent formulation, for washing clothes, it generally includes:

- at least one natural and / or synthetic surfactant, - at least one detergency builder ("builder")

- optionally an oxidizing agent or system,

- and a series of specific additives.

The detergent formulation may include surfactants in an amount corresponding to about 3 to 40% by weight based on the detergent formulation, surfactants such as anionic surfactants

. the alkyl esters sulfonates of formula R-CH (Sθ3M) -COOR ', where R represents an alkyl radical in Cs-20 _> preferably in C-ιrj-Ci6 _> R' an alkyl radical in Cj- Cg, preferably in C1- C3 and M an alkali cation (sodium, potassium, lithium), substituted or unsubstituted ammonium (methyl-, dimethyl-, trimethyl-, tetramethylammonium, dimethylpiperidinium ...) or derived from an alkanolamine (monoethanolamine, diethanolamine, triethanolamine .. .). Mention may very particularly be made of methyl ester sulfonates whose radicals R is C14-C16; . alkyl sulphates of formula ROSO3M, where R represents a C5-C24 alkyl or hydroxyalkyl radical, preferably in CJ QCI S- M representing an atom of hydrogen or a cation of the same definition as above, as well as their ethoxylenated (OE) and / or propoxylenated (OP) derivatives, having on average from 0.5 to 30 units, preferably from 0.5 to 10 units OE and / or OP; . sulfated alkylamides of formula RCONHROSO3M where R represents a C2-C22, preferably C6-C20, alkyl radical. R 'a C2-C3 alkyl radical, M representing a hydrogen atom or a cation of the same definition as above, as well as their ethoxylenated (OE) and / or propoxylenated (OP) derivatives, having an average of 0, 5 to 60 OE and / or OP patterns; . salts of C8-C24, preferably C-14- C20 saturated or unsaturated fatty acids, Cg-C20 alkylbenzenesulfonates. primary or secondary C8-C22 alkylsulfonates. alkyl glycerol sulfonates, sulfonated polycarboxylic acids described in GB-A-1 082 179, paraffin sulfonates, N-acyl N-alkyltaurates, alkylphosphates, isethionates, alkylsuccinamates alkylsulfosuccinates, monoesters or diesters of sulfosuccinates, N-acyl sarcosinates, alkyl glycoside sulfates, polyethoxycarboxylates; the cation being an alkali metal (sodium, potassium, lithium), a substituted or unsubstituted ammonium residue (methyl-, dimethyl-, trimethyl-, tetramethylammonium, dimethylpiperidinium ...) or derived from an alkanolamine (monoethanolamine, diethanolamine, triethanolamine ...); Nonionic surfactants

. polyoxyalkylenated (polyoxyethylenated, polyoxypropylenated, polyoxybutylenated) alkylphenols in which the alkyl substituent is Cg-C-12 and containing from 5 to 25 oxyalkylene units; by way of example, mention may be made of the Triton X-45, X-114, X-100 or X-102 sold by Rohm & Haas Cy. ; . glucosamide, glucamide, glycerolamide;

. polyoxyalkylenated C8-C22 aliphatic alcohols containing from 1 to 25 oxyalkylene units (oxyethylene, oxypropylene); by way of example, mention may be made of TERGITOL 15-S-9, TERGITOL 24-L-6 NMW sold by Union Carbide Corp., NEODOL 45-9, NEODOL 23-65, NEODOL 45-7, NEODOL 45-4 marketed by Shell Chemical Cy., KYRO EOB marketed by The Procter & Gamble Cy. ;

. the products resulting from the condensation of ethylene oxide, the compound resulting from the condensation of propylene oxide with propylene glycol, such as the PLURONIC sold by BASF; . the products resulting from the condensation of ethylene oxide, the compound resulting from the condensation of propylene oxide with ethylenediamine, such as TETRONIC sold by BASF; . amine oxides such as C-QC <\ Q alkyl dimethylamines, C8-C22 alkoxy ethyl dihydroxy ethylamines;

. the alkylpolyglycosides described in US-A-4,565,647;

. amides of C8-C20 fatty acids; . ethoxylated fatty acids;

. ethoxylated fatty amides;

. ethoxylated amines.

Amphoteric and zwitterionic surfactants alkyldimethylbetaines, alkylamidopropyldimethylbetaines, alkyltrimethylsulfobetaines, condensation products of fatty acids and protein hydrolysates; alkylamphoacetates or alkylamphodiacetates in which the alkyl group contains from 6 to 20 carbon atoms.

Detergency builders improving the properties of surfactants can be used in amounts corresponding to about 5-50%, preferably about 5-30% by weight for liquid detergent formulas or about 10 -80%, preferably 15-50% by weight for detergent formulas in powders, detergency adjuvants such as:

Inorganic detergency builders. polyphosphates (tripolyphosphates, pyrophosphates, orthophosphates, hexametaphosphates) of alkali metals, ammonium or alkanolamines

. tetraborates or borate precursors;

. silicates, in particular those having a Siθ2 / Na2θ ratio of the order of

1.6 / 1 to 3.2 / 1 and the lamellar silicates described in US-A-4,664,839; . alkali or alkaline earth carbonates (bicarbonates, sesquicarbonates);

. cogranules of hydrated alkali metal silicates and alkali metal carbonates (sodium or potassium) rich in silicon atoms in Q2 or Q3 form, described in EP-A-488 868;

. crystalline or amorphous aluminosilicates of alkali metals (sodium, potassium) or ammonium, such as zeolites A, P, X ...; Zeolite A with a particle size of the order of 0.1-10 micrometers is preferred.

Organic detergency builders water-soluble polyphosphonates (1-hydroxy-1 ethane, 1-diphosphonates, methylene salts diphosphonates ...); . water-soluble salts of carboxylic polymers or copolymers or their water-soluble salts such as: polycarboxylate ethers (oxidisuccinic acid and its salts, acid monosuccinic tartrate and its salts, disuccinic acid tartrate and its salts); hydroxypolycarboxylate ethers; citric acid and its salts, mellitic acid, succinic acid and their salts; the salts of polyacetic acids (ethylenediaminetetraacetates, nitrilotriacetates, N- (2 hydroxyethyl) -nitrilodiacetates); succinic C5-C20 alkyl acids and their salts (2-dodecenylsuccinates, lauryl succinates); polyacetal carboxylic esters; polyaspartic acid, polyglutamic acid and their salts; - polyimides derived from the polycondensation of aspartic acid and / or glutamic acid; polycarboxymethylated derivatives of glutamic acid or other amino acids.

The detergent formulation may further comprise at least one oxygen-releasing bleaching agent comprising a per-compound, preferably a persalt.

Said bleaching agent can be present in an amount corresponding to approximately 1 to 30%, preferably from 4 to 20% by weight relative to the detergent formulation. As examples of per-compounds capable of being used as bleaching agents, mention should be made in particular of perborates such as sodium perborate monohydrate or tetrahydrate; peroxygenated compounds such as sodium carbonate peroxyhydrate, pyrophosphate peroxyhydrate, urea peroxyhydrate, sodium peroxide, sodium persulfate.

Preferred bleaching agents are sodium perborate, mono- or tetrahydrate and / or sodium carbonate peroxyhydrate.

Said agents are generally combined with a bleach activator generating in situ in the washing medium, a peroxycarboxylic acid, in an amount corresponding to approximately 0.1 to 12%, preferably from 0.5 to 8% by weight relative to the detergent formulation. Among these activators, mention may be made of tetraacetylethylenediamine, tetraacetylmethylenediamine, sodium tetraacetylglycoluryl, sodium p-acetoxybenzenesulfonate, pentaacetylglucose, octaacetyllactose. Mention may also be made of non-oxygenated bleaching agents, acting by photoactivation in the presence of oxygen, agents such as sulfonated aluminum and / or zinc phthalocyanines. The detergent formulation may further comprise anti-fouling agents ("soil release"), anti-redeposition, chelating agents, dispersants, fluorescence, foam suppressants, softeners, enzymes and other various additives. Anti-fouling agents

They can be used in amounts of approximately 0.01-10%, preferably approximately 0.1-5%, and more preferably of the order of 0.2-3% by weight.

Mention may more particularly be made of agents such as:. cellulose derivatives such as cellulose hydroxyethers, methylcellulose, ethylcellulose, hydroxypropyl methylcellulose, hydroxybutyl methylcellulose;

. polyvinyl esters grafted on polyalkylene trunks such as polyvinylacetates grafted on polyoxyethylene trunks (EP-A-219 048); . polyvinyl alcohols;

. polyester copolymers based on ethylene terephthalate and / or propylene terephthalate and polyoxyethylene terephthalate units, with a molar ratio (number of units) ethylene terephthalate and / or propylene terephthalate / (number of units) polyoxyethylene terephthalate of the order of 1/10 to 10/1, preferably of the order of 1/1 to 9/1, the polyoxyethylene terephthalates having polyoxyethylene units having a molecular weight of the order of 300 to 5000, preferably of the order of 600 to 5000 (US-A-3,959,230, US-A-3,893,929, US-A-4,116,896, US-A-4,702,857, US-A-4,770,666); . sulfonated polyester oligomers obtained by sulfonation of an oligomer derived from ethoxylated allyl alcohol, dimethyl terephthalate and 1,2-propylene diol, having from 1 to 4 sulfonated groups (US Pat. No. 4,968,451); . polyester copolymers based on propylene terephthalate and polyoxyethylene terephthalate units and terminated by ethyl or methyl units (US-A-4,711,730) or polyester oligomers terminated by alkylpolyethoxy groups (US-A-4,702,857) or groups anionic sulfopolyethoxy (US-A-4,721,580), sulfoaroyl (US-A-4,877,896);

. sulfonated polyester copolymers derived from terephthalic, isophthalic and sulfoisophthalic acid, anhydride or diester and a diol (FR-A-2 720 399). Anti-redeposition agents, They can be used in quantities generally of approximately 0.01-

10% by weight for a powdered detergent formulation, approximately 0.01-5% by weight for a liquid detergent formulation.

Mention may in particular be made of agents such as: . ethoxylated monoamines or polyamines, polymers of ethoxylated amines

(US-A-4,597,898, EP-A-11,984);

. carboxymethylcellulose;

. the sulfonated polyester oligomers obtained by condensation of isophthalic acid, of dimethyl sulfosuccinate and of diethylene glycol

(FR-A-2 236 926);

. polyvinylpyrollidones.

Chelating agents

The iron and magnesium chelating agents can be present in amounts of the order of 0.1-10%, preferably of the order of 0.1-3% by weight. Among others, we can mention:

. aminocarboxylates such as ethylenediaminetetraacetates, hydroxyethylethylenediaminetriacetates, nitrilotriacetates;

. aminophosphonates such as nitrilotris- (methylenephosphonates); . polyfunctional aromatic compounds such as dihydroxy-disulfobenzenes.

Polymeric dispersing agents.

They can be present in an amount of the order of 0.1-7% by weight, to control the hardness of calcium and magnesium, agents such as. the water-soluble salts of polycarboxylic acids of molecular mass of the order of 2000 to 100,000, obtained by polymerization or copolymerization of ethylenically unsaturated carboxylic acids such as acrylic acid, maleic acid or anhydride, fumaric acid, itaconic acid, aconitic acid, mesaconic acid, citraconic acid, methylenemalonic acid, and in particular polyacrylates with a molecular mass of the order of 2,000 to 10

000 (US-A-3 308 067), the copolymers of arylic acid and maleic anhydride with a molecular weight of the order of 5,000 to 75,000 (EP-A-66,915)

. polyethylene glycols of molecular mass of the order of 1000 to 50,000.

Fluorescent agents (brighteners). They may be present in an amount of about 0.05-1.2% by weight, agents such as: stilbene derivatives, pyrazoline, coumarin, fumaric acid, cinnamic acid, azoles, methinecyanins, thiophenes ... ("The production and application of fluorescent brightening agents "- M. Zahradnik, published by John

Wiley & Sons, New York -1982). Foam suppressants.

They can be present in amounts of up to 5% by weight, agents such as: . C10-C24 monocarboxylic fatty acids or their alkali, ammonium or alkanolamine salts, fatty acid triglycerides;

. aliphatic, alicyclic, aromatic or heterocyclic saturated or unsaturated hydrocarbons, such as paraffins, waxes; . N-alkylaminotriazines;

. monostearylphosphates, monostearylalcoholphosphates;

. polyorganosiloxane oils or resins optionally combined with silica particles.

Softening agents They can be present in amounts of about 0.5-10% by weight, agents such as clays.

enzymes

They can be present in an amount of up to 5 mg by weight, preferably of the order of 0.05-3 mg of active enzyme / g of detergent formulation, enzymes such as:

. proteases, amylases, lipases, cellulases, peroxidases (US-A-3,553,139,

US-A-4 101 457, US-A-4 507 219, US-A-4 261 868).

Other additives

We can cite among others:. buffering agents,

. perfumes,

. pigments.

The detergent formulation can be used, in particular in a washing machine, at a rate of 0.5g / l to 20g / l, preferably from 2g / l to 10g / l to carry out washing operations at a temperature of range from 25 to 90 ° C.

When the treatment composition consists of an aqueous liquid rinse and / or fabric softening formulation, this can be used at a rate of 0.2 to 10 g / l, preferably 2 to 10 g / l. This rinsing operation

/ softening can be carried out at room temperature. Besides nanoparticles or nanolatex of polymer (P) may be present other constituents of the type

- combinations of cationic surfactants (triethanolamine diester quaternized by dimethylsulfate, N-methylimidazoline tallow methyl sulfate ester, dialkyldimethylammonium chloride, alkylbenzyldimethylammonium chloride, methyl and alkylimidazolinium sulfate, methyl and methyl bis bis ( alkylamidoethyl) -2 hydroxyethylammonium ...) in an amount which can range from 3 to 50%, preferably from 4 to 30% of said formulation optionally combined with non-surfactants ionic (ethoxylated fatty alcohols, ethoxylated alkylphenols, etc.) in amounts up to 3%;

- optical brighteners (0.1 to 0.2%);

- possibly anti-color transfer agents (polyvinylpyrrolidone, polyvinyloxazolidone, polymethacrylamide ... 0.03 to 25%, preferably 0.1 to

15%)

- dyes,

- perfumes,

- solvents, in particular alcohols (methanol, ethanol, propanol, isopropanol, ethylene glycol, glycerin)

- foam limiters.

When the treatment composition consists of a laundry drying additive in a suitable drying machine, this comprises a flexible solid support constituted for example by a strip of woven or nonwoven fabric, a cellulose sheet, comprising nanoparticles or impregnated with said polymer nanolatex (P); said additive is introduced on drying in the damp linen to be dried at a temperature of the order of 50 to 80 ° C for 10 to 60 minutes.

Said additive may further comprise cationic softening agents (up to 99%) and anti-color transfer agents (up to 80%) such as those mentioned above.

Another type of treatment composition consists of an ironing formulation which can be sprayed directly onto the dry laundry before the ironing operation. Said formulation may also contain polymers based on silicone (of

0.2 to 5%), nonionic surfactants (from 0.5 to 5%) or anionic surfactants (from

0.5 to 5%), perfumes (0.1 to 3%), cellulose derivatives (0.1 to 3%) such as starch; spraying said formulation on the linen makes it easier to iron and limit wrinkling of the linen when worn. Another type of treatment composition is a washing additive

("prespotter") in the form of an aqueous dispersion or a solid

(stick).

Besides the nanoparticles or the nanolatex of polymer (P) may be present other constituents of the type - anionic surfactants such as those already mentioned above, in an amount of at least 5% of the weight of the composition.

- nonionic surfactants such as those already mentioned above, in an amount which can range from 15% to 40% of the weight of the composition - Aliphatic hydrocarbons, in an amount which can range from 5% to 20% of the weight of the composition.

A second object of the invention consists in a process for bringing anti-creasing properties to the laundry and / or facilitating the ironing thereof by treatment of the latter using a composition, in an aqueous or humid medium, comprising at least nanoparticles or a nanolatex of at least one polymer (P) not soluble in said medium.

The type of composition, as well as the quantities of polymer (P) and other additives that may be present and the operating conditions used, have already been mentioned above.

Other objects of the invention consist of aqueous formulations for ironing the laundry, laundry drying additives, detergent formulations for washing the laundry and laundry washing additives comprising nanoparticles of at least one polymer (P) or at least one nanolatex of at least one polymer (P) chosen from polymers (P3). The amount of polymer (P3) and the other additives which may be present have already been mentioned above.

The diameters of the polymer nanoparticles or nanolatexes according to the invention can be determined in a well-known manner by light scattering or by transmission electron microscopy.

The following examples are given by way of illustration.

The latexes of polymer (P) used for producing the formulations of the examples of the invention are the following latexes (I) and (II)

latex (I) of

* methyl methacrylate / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid / N, N-dimethyl-N-methacryloyloxyethyl-N- (3-sulfopropyl) ammonium sulfobetaine (SPE from RASCHIG) according to a mass ratio between the different monomers of 42, 3 / 35.4 / 15.8 / 4.2 / 2.2 whose glass transition temperature Tg is of the order of 41 ° C. having an average particle size of the order of 35 to 45 nm (determination by light scattering using a Zetasizer device from Malvern Instrument) and having a dry extract of the order of 30%.

latex (II) of

* methyl methacrylate / butyl acrylate / hydroxyethylmethacrylate / methacrylic acid, according to a mass ratio between the different monomers of 37/55/5/3 whose glass transition temperature Tg is around 17 ° C having a size average of particles of the order of 30 to 35 nm (determination by light scattering using a Zetasizer

Malvern Instrument) and having a dry extract of the order of 30%.

Example 1

Detergent formulation

A washing operation is carried out in a laboratory apparatus Tergotometer well known in the profession of formulators of detergent compositions. The device simulates the mechanical and thermal effects of washing machines of the American type with pulsator, but thanks to the presence of 6 washing pots, it allows to carry out series of simultaneous tests with an appreciable saving of time. We cut out of cotton samples 25x25 cm. The cotton test pieces are first ironed in order to all have the same level of crumpling before washing.

They are then washed using the above detergent formulation containing the latex (I) and rinsed 1 time, under the following conditions:

- number of test tubes per jar of the Tergotometer: 2

- water volume: 1 liter

- water with French hardness 30 ° TH obtained by appropriate dilution of Contrexéville® brand mineral water - detergent concentration: 5 g / l

- washing temperature: 40 ° C

- washing time: 20 min

- Tergotometer stirring speed: 100 RPM

- rinse with cold water (around 30 ° TH) - rinse time: 5 minutes

The test pieces are then crumpled under a 3 kg press for 20 seconds, then allowed to dry vertically overnight.

The same operation is carried out using the same detergent formulation but free of latex (I). A digital color photograph of the dry specimens is then produced, which is then transformed into 256 levels of gray (gray scale from 0 to 255).

We count the number of pixels corresponding to each gray level.

For each histogram obtained, the standard deviation σ of the distribution of the gray level is measured. σi corresponds to the standard deviation obtained with the detergent formulation not containing latex. σ2 corresponds to the standard deviation obtained with the detergent formulation containing the latex (I). The performance value is given by the equation -Δσ = σ2-σl

The performance values obtained are as follows:

These positive values of -Δσ are representative of an anti-creasing property provided by the detergent formulation comprising the latex according to the invention. Example 2

Rinse / softening formulation

Claims

1) Use, in a composition for the treatment of linen in an aqueous or humid medium, of nanoparticles of at least one polymer (P) or of at least one nanolatex of at least one polymer (P) not soluble under the conditions d use in an aqueous or moist medium of said composition, as an anti-creasing agent and / or an ironing aid.

2) Use according to claim 1) characterized in that said nanoparticles or said nanolatex have an average size of polymer particles from 10 to 500 nm, preferably from 20 to 300 nm, very particularly from 20 to 100 nm, even more particularly from 20 to 50 nm.

3) Use according to claim 2) characterized in that said nanolatex has a dry extract of 10 to 50% by weight, preferably 20 to 40% by weight.

4) Use according to any one of claims 1) to 3), characterized in that said composition is in the form * of a solid or of a concentrated aqueous dispersion, brought into contact with the linen to be treated, after dilution in water ;

* a concentrated dispersion previously deposited on the dry linen to be treated before dilution in water;

* an aqueous dispersion to be deposited directly on the dry linen to be treated without dilution or a solid support comprising said particles or said nanolatex, to be applied directly to the dry linen to be treated;

* or an insoluble solid support comprising said particles or said nanolatex placed in direct contact with the linen to be treated in the wet state.

5) Use according to any one of claims 1) to 4), characterized in that said composition comprises from 0.05 to 10% of said particles or of said nanolatex expressed as dry.

6) Use according to any one of claims 1) to 5), characterized in that said composition is

- A solid or liquid detergent formulation comprising from 0.05 to 5%, preferably from 0.1 to 3% of said particles or of said nanolatex, expressed as dry, capable of directly forming by dilution a detergent bath; a liquid rinsing and / or softening formulation comprising from 0.05 to 3%, preferably from 0.1 to 2% of said particles or of said nanolatex, expressed in dry form, capable of forming directly by dilution a rinsing bath and / or softening; - a solid material, textile in particular, comprising from 0.05 to 10%, preferably from 0.1 to 5% of said particles or of said nanolatex, expressed in dry matter, intended to be brought into contact with damp linen in a dryer laundry ;

an aqueous ironing formulation comprising from 0.05 to 10%, preferably from 0.1 to 5% of said particles or of said nanolatex, expressed as dry;

a washing additive comprising from 0.05 to 10%, preferably from 0.1 to 5% of said particles or of said nanolatex, expressed as dry, intended to be deposited on the dry linen before a washing operation with the using a detergent formulation containing or not containing said particles or said nanolatex.

7) Use according to any one of claims 1) to 6), characterized in that said polymer (P) comprises:

- optionally at least one hydrophilic monomer unit (F) chosen from the monomer units

* (F1) cationic or cationizable at the pH of use of said composition,

* (F2) amphoteric at the pH of use of said composition, * (F3) anionic or anionizable at the pH of use of said composition,

* (F4) uncharged or non-ionizable, hydrophilic in nature, at the pH of use of said composition,

* or their mixtures

- and possibly at least one crosslinking unit (R).

8) Use according to claim 7), characterized in that said monomer units (N) and (F) are derived from α-β monoethylenically unsaturated monomers, and any monomer units (R) are derived from diethylenically unsaturated monomers.

9) Use according to claim 7) or 8), characterized in that the hydrophobic units (N) are derived from vinyl aromatic monomers, from alkyl esters of α-β monoethylenically unsaturated acids, from vinyl esters or allyl of saturated carboxylic acids, monoethylenically unsaturated α-β nitriles, α-olefins.

10) Use according to any one of claims 7) to 9), characterized in that the cationic or cationizable hydrophilic units (F1) derive from N, N (dialkylaminoωalkyl) amides of α-β monoethylenically unsaturated carboxylic acids, monoethylenically unsaturated α-β aminoesters, of precursor monomers of primary amino functions by hydrolysis.

11) Use according to any one of claims 7) to 10), characterized in that the amphoteric hydrophilic units (F2) derive from N, N-dimethyl-N-methacryloyloxyethyl-N- (3-sulfopropyl) ammonium sulfobetaine, N, N-dimethyl-N- (2-methacrylamidoethyl) -N- (3-sulfopropyl) ammonium betaine, 1-vinyl-3- (3-sulfopropyl) imidazolidium betaine, 1- (3- sulfopropyl) -2 -vinylpyridinium betaine, derivatives of the quaternization reaction of the N (dialkylaminoωalkyl) amides of α-β ethylenically unsaturated carboxylic acids or α-β monoethylenically unsaturated amino esters by an alkali metal chloroacetate or propane sultone.

12) Use according to any one of claims 7) to 11), characterized in that the anophilic or anionizable hydrophilic units (F3) are derived from monoethylenically unsaturated α-β monomers having at least one carboxylic function, from monoethylenically α-β monomers unsaturated having at least one sulfate or sulfonate function, monoethylenically unsaturated α-β monomers having at least one phosphonate or phosphate function, and their water-soluble salts, monoethylenically unsaturated α-β monomers precursors of carboxylate function (s) by hydrolysis .

13) Use according to any one of claims 7) to 12), characterized in that the hydrophilic units (F4) uncharged or non-ionizable derive from hydroxyalkylesters of monoethylenically unsaturated α-β acids, amides of α acids -β monoethylenically unsaturated, α-β ethylenically unsaturated monomers carrying a water-soluble polyoxyalkylenated segment, α-β monoethylenically unsaturated monomers precursors of vinyl alcohol units or of polyvinyl alcohol segments by polymerization then hydrolysis, or of methacrylamido of 2-imidazolidinone ethyl. 14) Use according to any one of claims 7) to 13), characterized in that the crosslinking units (R) derive from divinylbenzene, ethylene glycol dimethacrylate, allyl methacrylate, methylene bis (acrylamide), glyoxal bis (acrylamide), butadiene.

15) Use according to any one of claims 7) to 14), characterized in that the choice and the relative amounts of the monomer (s) from which the unit (s) (N), (F) and (R) of the polymer are derived ( P) are such that said polymer (P) has a glass transition temperature Tg of - 40 ° C to 150 ° C, preferably of -40 to 100 ° C, very particularly of -40 to 40 ° C, and remains insoluble under the conditions of use of the composition of the invention.

16) Use according to any one of claims 7) to 15), characterized in that at least 70% of the total mass of said polymer (P) is formed of hydrophobic unit (s) and in that, when present, the hydrophilic units (F) do not represent more than 30% of the total mass of the polymer (P) and the crosslinking units (R) do not represent more than 20%, preferably not more than 10% , especially not more than 5% of the total mass of the polymer (P).

17) Use according to claim 16), characterized in that said polymer (P) is an uncharged or non-ionizable polymer (P1) comprising • at least 70% of its weight of hydrophobic monomer units (N)

• optionally at least 1%, preferably from 3 to 30% of its weight of uncharged or non-ionizable hydrophilic monomer units (F4)

• possibly not more than 20%, preferably not more than 10% of its weight of crosslinking units (R) uncharged or non-ionizable

18) Use according to claim 17), in a detergent formulation, a rinse and / or softening formulation, a drying additive, an aqueous ironing formulation or a washing additive.

19) Use according to claim 16), characterized in that said polymer (P) is a polymer (P2) having anionic or anionizable units and free of cationic or cationizable units, comprising

• at least 70% of its weight of hydrophobic monomer units (N) • at least 1% of its weight, preferably 3 to 30% of its weight, very particularly from 1 to 20% of its weight of anionic or anionizable hydrophilic monomer units (F3)

20) Use according to claim 19), in a detergent formulation, a drying additive, an aqueous ironing formulation or a washing additive.

21) Use according to claim 16), characterized in that said polymer (P) is a polymer (P3) having amphoteric units, comprising

• at least 70% of its weight of hydrophobic monomer units (N) “at least 0.1% of its weight, preferably not more than 20% of its weight, especially not more than 10% of its weight of amphoteric hydrophilic monomer units (F2)

• optionally hydrophilic monomer units (F4) uncharged or non-ionizable • optionally hydrophilic monomer units (F1) cationic or cationizable all hydrophilic monomer units (F) preferably representing at least 1% of the weight of the polymer (P3 ), and the molar ratio of cationic charges to anionic charges ranging from 1/99 to 80/20 depending on the composition of the treatment composition sought.

22) Use according to claim 21), in a drying additive or an aqueous ironing formulation when the molar ratio of cationic charges to anionic charges of said polymer ranges from 1/99 to 80/20.

23) Use according to claim 21), in a detergent formulation, a washing additive, a drying additive, an aqueous ironing formulation, when the molar ratio of cationic charges to anionic charges of said polymer ranges from 1/99 to 60 / 40, preferably from 5/95 to 50/50. 24) Use according to claim 16), characterized in that said polymer (P) a polymer (P4) having both cationic or cationizable units and anionic or anionizable units, comprising

• at least 70% by weight of hydrophobic monomer units (N) • cationic or cationizable hydrophilic monomer units (F1)

• anionic or anionizable hydrophilic monomer units (F3)

• optionally amphoteric hydrophilic monomer units (F2)

• optionally hydrophilic monomer units (F4) uncharged or non-ionizable, all the hydrophilic monomer units (F) preferably representing at least 1% of the weight of the polymer (P4), and the molar ratio of cationic charges to charges anionic ranging from 1/99 to 80/20 depending on the treatment composition sought.

25) Use according to claim 24), in a drying additive or an aqueous ironing formulation when the molar ratio of cationic charges to anionic charges of said polymer ranges from 1/99 to 80/20.

26) Use according to claim 24), in a detergent formulation, a washing additive, a drying additive, an aqueous ironing formulation, when the molar ratio of cationic charges to anionic charges of said polymer ranges from 1/99 to 60 / 40, preferably from 5/95 to 50/50.

27) Use according to claim 16), characterized in that said polymer (P) is a polymer (P5) having cationic or cationizable units and free of anionic or anionizable units, comprising

• at least 70% of its weight of hydrophobic monomer units (N)

• at least 1% of its weight, preferably from 3 to 30% of its weight, very particularly from 1 to 10% of its weight of hydrophilic monomer units

(F1) cationic or cationizable

28) Use according to claim 27), in a detergent formulation, a rinse and / or softening formulation, a drying additive, an aqueous ironing formulation or a washing additive. 29) Process for bringing anti-creasing properties to linen and / or for facilitating ironing of linen, by treatment of the latter in an aqueous or wet medium, using a composition comprising nanoparticles of at least one polymer (P) or at least one nanolatex of polymer (P), the use of which is the subject of any one of claims 1) to 28).

30) Aqueous ironing formulation for linen comprising nanoparticles of at least one polymer (P) or at least one nanolatex of at least one polymer (P) chosen from the polymers (P3) the use of which makes subject of claim 21).

31) Laundry drying additive comprising nanoparticles of at least one polymer (P) or at least one nanolatex of at least one polymer (P) chosen from the polymers (P3) whose use is the subject of claim 21).

32) Detergent formulation for washing clothes comprising nanoparticles of at least one polymer (P) or at least one nanolatex of at least one polymer (P) chosen from polymers (P3) which are used object of claim 23).

33) Laundry washing additive comprising nanoparticles of at least one polymer (P) or at least one nanolatex of at least one polymer (P) chosen from the polymers (P3) whose use is the subject of claim 23).