ES2388072T3 - Tissue care compositions - Google Patents

Abstract

A composition for the treatment of tissues, for use in the rinse cycle of a washing machine to reduce wrinkling by use in the tissues, the composition comprising: a) a dispersion of nanoparticles comprising particles having an average particle size understood in the range of 5 to 500 nm, b) a lubricating phase selected from a cationic fabric softener, a silicone oil, a sucrose polyester oil and mixtures thereof, and c) water, in which the ratio of a): b) is in the range of 3: 1 to 1: 3, and in which the denanoparticle dispersion is a cationic or neutral colloidal dispersion of silica.

Description

Tissue care compositions

Field of the Invention

The present invention relates to tissue care compositions. More specifically, the invention relates to compositions for the care of the tissues in the rinse cycle, which reduce the wrinkling of the tissues and, in particular, the formation of wrinkles dry or by use, giving the tissues an aspect of Ironed throughout the day.

Background of the invention

Tissue care compositions are known that reduce wrinkle formation in the tissues being used.

Mechanical wrinkle reduction techniques, such as heat and pressure, for example ironing, are effective ways to flatten clothing. However, the effect is not permanent and wrinkles reappear due to a range of tear, torsion and compression deformation forces applied during use. Body heat and moisture act on the tissue to relax it and thereby increase the wrinkling of these deforming forces.

The teachings of the prior art anti-wrinkle can be classified according to three alternatives:

(to)

 use lubricants for wrinkle recovery

(b)

 use crosslink formers and film formers to stiffen the fibers so that they resist wrinkles in the first place, and

(C)

 combine (a) and (b).

Lubricants used in the prior art include silicones, for example PDMS, aminosilicones, modified silicones, silicone copolymers, softeners (for example, quaternary ammonium compounds) and other lubricants such as clays, waxes, polyolefins, natural and synthetic oils.

Film formers and crosslink formers used in the prior art include:

Natural polymers enzymes proteins, cyclodextrins, polysaccharides such as, for example, chitin starch, chitosan, cellulose, 3-1,4-polysaccharides, SCMC, guar gum, HEC, etc.,

Synthetic polymers - polyamides, polyurethanes, polyamines, polyolefins, polyols, PEGs, polystyrene, PVA, PVC, vinyl polymers, acrylics,

Polymers - film-forming copolymers, adhesives,

Reactive polymers - containing epichlorohydrin, containing isocyanate, containing curable epoxy,

Elastomeric polymers - thermoplastic silicone elastomers,

Small molecules - salts, amino acids, sugars, saccharides, oligosaccharides, alcohols, acids, and

Cross bond formers - based on methylol urea, carboxylic acid, formaldehyde, ammonium, triazine, epoxide.

WO 2004/018762 A1 (Philips) discloses a benefit against wrinkles with the use of fusible elastomeric film formers, with cross-linked particles to improve wrinkle recovery in aerosol and iron cartridge applications.

WO 2004/048677 (Philips) discloses film formers for recovery in aerosol or iron cartridge applications including fusible elastomers + poly-cation salt for x-bond formation of elastomer.

WO 2001 / 25381-5 (Ciba) discloses a composition with (A) fabric softener, (B) an additive, and (C) polyorganosilicones selected to provide the tissues with domestic applications of ball anti-formation recovery, elasticity, hydrophilicity, draping and recovery against wrinkles, respectively. These properties are provided by organosilicone. Among the additives, polysilicic acid is mentioned.

WO 2002/088293 and US-A1-2002 / 019236 (Unilever) describe in both cases tissue care compositions comprising coated particles that include a solid core with an average particle size D3.2 of between 10 and 700 nm in diameter, and a silicone polymer coating covalently linked to the solid core. Silica is mentioned within a list of materials suitable for the solid core.

EP 1201817 (A1) (Procter & Gamble) discloses aminosilicones with sterically opposed functional groups to provide resistance against wrinkles by use, which are preferably supplied by means of an aerosol during a domestic ironing process.

EP 1096060 (A1) (Procter & Gamble) discloses water-soluble silicone lubricants in combination with various polymeric compounds (film-forming) that are believed to provide the tissues with a wrinkle recovery angle of at least +15 units Above and above the water.

EP 953675 (A2, A3) (Dow Corning) discloses a textile fabric coated with an elastomeric silicone-based compound with a reinforcing filler, preferably a silica + a second laminar filler, preferably talc and mica. Coated fabrics have, among other benefits, less friction and are used for car seat belts. There is no teaching on the benefit regarding wrinkles of silicone mixtures + granulated fillers. GB 842027 (Monsanto Chemicals) discloses textile friction augmentation compositions based on silica nanoparticles dispersed inside oil emulsion droplets. The oil can be any of the known textile oils including mineral or vegetable oils. The ratio of oil to silica exceeds 6 and it is preferred that the deposition levels be 3-7% oil and 1-0.5% silica with respect to tissue weight.

US 2635056 (Monsanto) discloses the treatment of textiles and fabrics with a silica waterasol plus a polyhydric alcohol such as glycerol. The mixtures are called alco-aqueous alcohols and provide textiles with exceptional slip resistance and surprisingly good handling and a good touch of the fabric, attributed to the presence of glycerol. The ratio of silica to glycerol used in the example is 1.4. It is stated that the level of polyhydric alcohol should not exceed twice that of silica.

WO-2001/083875 (Ajinomoto Co.) discloses the application of silica and a softener with a cationic acrylic binder followed by the application of a treatment solution containing arginine for nylon stockings in order to provide care benefits of the skin when the stockings are worn.

EP 1024119 (A2, A3) (Relats) discloses textile articles made of fibers containing SiO2 and a process for improving its thermal stability.

JP 04255767 (Nichihan Kenkyusho KK) discloses textile coating compositions comprising a synthetic emulsion (acrylic), silica gel of colloidal metal oxide or microparticles, and a zeolite, to provide textile coatings with good antibacterial, deodorizing properties, drying and heat retention.

Document NL 8900473 (Hesco Fashion Netherlands) discloses the manufacture of viscose rayon polyester coated with a mixture of a non-ionic fatty acid condensate fabric softener and an acidic silica dispersion of a blocking agent (incremental blocking by friction of the free movement of the warp and the weft). The ratio of softener to silica is 1: 1 and the level applied is 1% silica and 1% softener.

EP 0474207, US 2881146, US 3077460 and US 5102930 all disclose tissue treatment compositions comprising silica, an organopolysiloxane and a catalyst / curing agent to cause a polymer film to form on the tissues.

There is no product available in the market that meets the needs of consumers in terms of effective resistance to wrinkles by use with respect to the main wash or with regard to rinsing.

Therefore, there is a need for an effective and effective means that prevents wrinkles from reappearing after the ironing process during use while the tissues retain good handling, softness and ease of use.

It is desirable for consumers to have a composition for use during rinsing, which provides effective removal or reduction of wrinkles in dry tissue per use, in addition to the benefits of good softness and the normally expected aroma of products added to the rinse.

Additionally, it is particularly desirable that the wrinkle resistance by use be provided by the composition after the first wash cycle in which it is used.

Objects of the invention

The present invention aims to address one or more of the problems mentioned above.

Summary of the invention

In accordance with one aspect of the present invention, a fabric treatment composition is provided, for use in the rinse cycle of a washing machine, to reduce wrinkles by use on the tissues, the composition comprising:

a) a nanoparticle dispersion comprising particles having an average particle size of 5 to 500 nm,

b) a lubricating phase chosen from a cationic fabric softener, a silicone oil, sucrose polyester oil and mixtures thereof, and

c) water,

wherein the weight ratio of a): b) is in the range of 3: 1 to 1: 3, and in which the nanoparticle dispersion is a cationic dispersion, or a neutral colloidal silica.

The compositions of the invention are used in the rinse cycle of a washing process and impart resistance against wrinkles by use to the treated tissues. The compositions comprise a mixture of nanoparticles, which act as a friction element, and a lubricating phase. The balance of the nanoparticles and the lubricating phase provides the desired properties by virtue of their physical properties. The compositions of the invention are free of catalysts and curing agents, and do not react to form any film when deposited on the tissue.

Detailed description of the invention

The compositions of the present invention are typically intended for use as part of a fabric care composition, which is supplied to the rinse cycle of an automatic washing machine.

Nanoparticles

The compositions of the present invention comprise a dispersion of nanoparticles that act as friction elements when deposited on the tissues. The particles are inorganic.

Suitable inorganic nanoparticles include silicas, SiO2.

The widely commercialized and preferred inorganic nanoparticles are the amorphous silicas available in colloidal or sol form, as defined on page 330 of The Chemistry of Silica, by R K Iler, Wiley-Interscience, New York, 1979.

The silica nanoparticles could also be non-siliceous core as long as the surface of the nanoparticles is coated with silica as described on page 330 of the Iler book. The core can be organic polymeric in nature.

In the context of the present invention, the term "nanoparticle" indicates particles having an average particle size in the range of 5 to 500 nm. Silica particles of larger size also help in resistance to wrinkles, but apparently are not as effective as those between 15-100 nm. Preferably, all particles have a particle size below 500 nm, and more preferably below 100 nm.

It has been found that a particle size of 500 nm or less provides excellent resistance against wrinkles on poplin fibers, and a particle size of 300 nm or less provides excellent resistance against wrinkles on cotton fibers.

Dispersions having an average particle size in the range of 10 to 50 nm are particularly useful. The amount to be deposited is between 0.25 and 2%, and preferably between 0.25 and 0.5% by weight (0.0025 to 0.005 g / g of tissue).

Depending on their structures, the nanoparticles can provide additional benefits: it is possible to achieve absorption of odors during use, increased freshness for a longer duration, reduced brightness and luster with the ironing of the articles, resistance to fouling, and ease to remove stains in successive washes.

Preferred nanoparticles for use in the invention consist of colloidal silica. The term "colloidal silica" refers herein to dispersions or soles of discrete particles of amorphous silica, which are preferably stable. Stabilized silica is hydrophobic smoked silica as used in antifoam emulsions mentioned above.

The commercial colloidal silica that is available contains up to 50% silica with a particle diameter between 10-21 cm, under the Ludox (ex Grace Division), and Snowtex (ex Nissan) brands. Examples of particles include Ludox CI (a cationic silica) and Ludox HS50 (an anionic silica), both having a particle size of 20 nm. The quoted size represents the linear diameter of the particle.

The fact that the surface of the silica particles can be modified to provide them with additional benefits is well known in the state of the art. For example, modification with aluminates allows a modification of the surface charge (positive charge). Silicas can be organically modified (organosols as described on page 412 of the reference mentioned). Preferred silicas have suitable modifications in terms of surface loading and / or other textile functional benefits including antimicrobial, dermal and transdermal, controlled release of fragrance and repellent agents, improved abrasion stability, water, oil and dirt repellency, and UV protection as described in Journal of Sol-Gel Science and Technology 27, 43-52, 2003, by B. Mahitig and H. Bottcher, in Modified Silica Sun Coatings for Water Repellent Textiles.

Lubricant phase

The compositions of the present invention comprise a fiber lubricant selected from silicone oils, sucrose polyester oils, or oily derivatives of sugars and fabric softening quaternary ammonium materials.

The lubricating phase of interest includes silicone oils and oily derivatives of sugars.

Silicone lubricants of interest include the three conventional classes of non-reactive silicone polymers (PDM), reactive silicone polymers (silanol-terminated PDMS) and modified silicone polymers (amino / amide functional siloxanes, non-ionic modified siloxanes, or siloxanes modified polyether). Preferred silicones are the PDMS types in emulsion or microemulsion format, which are commercially available, Dow Corning 1716 microemulsion (cationic), etc. Also the non-ionic microemulsion of silicones DC amino 28669, non-ionic microemulsion 2-8203, non-ionic macroemulsion 28197.

Another class of preferred silicones are ex-Weckers that include Wetsoft CTA (amino glycol PDMS), Finish CT 34E (amino emulsion PDMS), Finish CT 280E (amino emulsion OH PDMS), Finish CT 96 E (amino emulsion PDMS) , and its Fluid L range, for example Fluid L 652 (amino PDMS).

Although silicone oils are preferred to improve tissue handling and smoothness, non-silicone lubricants such as sucrose polyester oils can provide the necessary lubrication for tissue recovery against wrinkles. WO 2002/019236 A1 (Unilever) provides a more complete list of silicone polymers of interest, and EP 1205538 (Unilever) the class of drying oils.

A preferred class of commercial materials in which the particulate phase and the lubricating phase are combined, includes but not limited to Dow Corning stabilized silicone + silica mixtures marketed as antifoaming agents that include CORNING Antifoam B, DOW CORNINGN @ 544, DOW CORNING @ Q2-3302 ANTIESPUMA COMPOUND, DOW CORNING @ 1581 WATER REPELLENT, DOW CORNING @ 2-1912 FLUID.

Another preferred class of materials in which the particulate phase and the lubricating phase are combined, includes but is not limited to the range of Dow Corning MQ silicone resins containing a PDMS silicone oil and a nanoparticulate phase of silicone resin.

Suitable sucrose polyester oils are the reaction products of fatty acid methyl ester (FAME) from natural oils and sucrose. Suitable oils and their preparation are described in EP 323670 B1, EP383404 B1, WO 2001/46210, WO 98/16538, WO 01/46359 A1 and in British Patent Application No. 0501006.1.

Preferred oils are derived from natural oils that essentially comprise C16 and C18 hydrocarbon chains, for example palm oil and soybean oil.

The fabric-softening quaternary ammonium material is generally one capable of forming a laminar phase dispersion in water, in particular a liposome dispersion.

The quaternary ammonium compound "QAC" is preferably one having two C12-28 groups, which can be independently alkyl or alkenyl groups, connected to the nitrogen header group, preferably being connected to the nitrogen header group via the less an ester bond, and more preferably by means of two ester bonds.

The average chain length of the alkyl and / or alkenyl groups is preferably at least C14 and more preferably at least C16. It is particularly preferred that at least half of the groups have a chain length of C18. In general, the alkyl and / or alkenyl groups are predominantly linear.

A first group of QACs suitable for use in the composition, is represented by formula (I):

Wherein each R is independently selected from a C5-35 alkyl or alkenyl group; R1 representing a C1-4 alkyl, C2-4 alkenyl or a C1-4 hydroxyalkyl group; T is usually O-CO (ie, an ester group linked to R via its carbon atom), but it may alternatively be CO.O (ie, an ester group linked to R via its oxygen atom); n is a number chosen between 1 and 4; m is a number chosen from 1, 2 or 3; and X- is an anionic counter-ion, such as a halide or an alkyl sulfate, for example chloride or methylsulfate. The diester variants of formula I (ie, m = 2) are preferred and typically have mono- and tri-ester analogs associated therewith. Such materials are particularly suitable for use in the present invention.

Especially preferred agents are diesters of triethanolammonium methylsulfate, mentioned where appropriate

25 as "TEA ester quats". Commercial examples include Prapagen TQL, ex Clarian, and Tetranyl AHT-1, ex Kao (both di- [hardened tallow ester] of triethanol ammonium methylsulfate), AT-1 (di- [tallow ester] of triethanolammonium methylsulfate ), and L5 / 90 (palm ester) of triethanolammonium methylsulfate), both ex Kao, and Rewoquat WE15 (a triethanolammonium methyl sulfate di-ester having fatty acyl residues from C10-C20 and C16 fatty acids -C18 unsaturated), former Witco Corporation.

The second group of QACs suitable for use in the compositions, is represented by formula (II):

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 C8-28 alkyl or alkenyl groups; and in which n, T and X-are defined as above.

Preferred materials of this second group include 1,2bis [seboyloxy] -3-trimethylammonium propane chloride, 1,2 bis [hardened seboyloxy] -3-trimethylammonium propane chloride, 1,2-bis [oleoyloxy] -3 chloride -trimethylammonium propane, and 1,2 bis [stearoyloxy] -3-trimethylammonium propane chloride. Such materials have been described in US 4137180 (Lever Brothers). Preferably, these materials also comprise an amount of the corresponding mono-ester.

A third group of QACs suitable for use in the composition is represented by formula (III):

(R1) 2-N + - [(CH2) n-T-R2] 2 X- (III)

wherein each R1 group is independently selected from C1-4 alkyl or C2-4 alkenyl groups; and wherein each R2 group is independently selected from C8-28 alkyl or alkenyl groups; and n, T and X- are as defined above. Preferred materials of this third group include bis (2-seboyloxyethyl) dimethyl ammonium chloride and hardened versions thereof.

A fourth group of QACs suitable for use in the composition is represented by formula (IV):

(R1) 2-N + - (R2) 2 X- (IV)

wherein each R1 group is independently selected from C1-4 alkyl or C2-4 alkenyl groups; and wherein each R2 group is independently selected from C8-28 alkyl or alkenyl groups; and X- is as defined above. Preferred materials of this fourth group include di (hardened tallow) dimethyl ammonium chloride.

The iodide value of the softening agent is preferably 0 to 20, more preferably 0 to 4, and more preferably 0 to 2. An essentially saturated material, ie having an iodide value between 0 and 1, is used in Especially high yield compositions. At low iodide values, the softening behavior is excellent and the composition has an improved resistance to oxidation and associated odor problems during storage.

The iodide value is defined as the number of grams of iodide absorbed per 100 g of test material. NMR spectroscopy is a suitable technique for determining the iodide value of the softening agents of the present invention, using the method described in Anal. Chem., 34, 1136 (1962) by Johnson and Shoolery in EP 593542 (Unilever, 1993).

The softening agent is normally present in the compositions of the invention at a level of 5%

or greater, by weight, of the total composition.

References to levels of cationic softening agent in the present description refer to the total level of cationic softening agent, including all cationic components of a complex raw material that could enter along with an aqueous lamellar phase. With a di-ester softening agent, this includes any associated monoester or tri-ester that may be present.

For ease of formulation, the amount of softening agent is generally 50% or less, in particular 40% or less, and especially 30% or less, by weight of the total composition. Generally, the softening agent is present in an amount of between 3 and 20% by weight of the composition.

Fatty complexing agent

The composition of the present invention may comprise a fatty complexing agent. Especially suitable fatty complexing agents include fatty alcohols and fatty acids. Among them, fatty alcohols are the most preferred.

Preferred fatty acids include hardened tallow fatty acid (available under the brand name Pristerene, ex Uniqema).

Preferred fatty alcohols include hardened tallow alcohol (available under the brands Stenol and Hydrenol, ex Cognis and Laurex CS, ex Albright and Wilson) and behenyl alcohol, available as Lanette 22 (ex Henkel).

The fatty complexing agent is present in an amount of between 0.1% and 15% by weight based on the total weight of the composition. More preferably, the fatty component is present in an amount of between 0.2% and 10%, more preferably between 0.25% and 5%, for example between 0.3% and 4% by weight .

Nonionic Surfactant

The compositions may further comprise a nonionic surfactant. Typically these can be included for the purpose of stabilizing the compositions.

Suitable non-ionic surfactants include the addition products of ethylene oxide and / or propylene oxide with fatty alcohols, fatty acids and fatty amines.

Any of the alkoxylated materials of the particular type described above can be used as a non-ionic surfactant. Suitable surfactants are substantially water soluble surfactants of the general formula:

R-Y- (C2H4O) z-C2H4OH

where R is selected from the group consisting of alkyl and / or acyl hydrocarbyl groups of primary, secondary or branched chain; primary, secondary and branched chain alkenyl hydrocarbyl groups; and substituted hydrocarbyl phenolic alkenyl groups of primary, secondary and branched chains; the hydrocarbyl groups having a chain length between 8 and about 25, preferably between 10 and 20, for example 14 to 18 carbon atoms.

In the general formula for the ethoxylated nonionic surfactant, Y typically consists of: --O--, --C (O) O--, --C (O) N (R) - or –C (O) N (R) R—

in which R has the meaning given in the foregoing or may be hydrogen; and Z is a value of at least about 8, preferably at least about 10 or 11.

Preferably, the non-ionic surfactant has an HLB of between about 7 to about 20, more preferably 10 to 18, for example 12 to 16.

Examples of nonionic surfactants are given below. In the examples, the integer defines the number of ethoxy groups (EO) of the molecule.

A. Straight chain primary alcohol alkoxylates

The deca-, undeca-, dodeca-, tetradeca-, and pentadeca-ethloxylates of h-hexadecanol and n-octadecanol, which have an HLB within the range defined herein, are useful viscosity / dispersibility modifiers in the context of the present invention. Examples of primary ethoxylated alcohols useful in the present invention as viscosity / dispersibility modifiers of the compositions are C18 EO (10) and C18 EO (11). The ethoxylates of mixed natural or synthetic alcohols within the chain length range of the "tallow" are also useful herein. Specific examples of such materials include tallow alcohol EO (11), tallow alcohol EO (18), and tallow alcohol EO (25), coconut alcohol EO (10), coconut alcohol E (20) and alcohol EO (25) coconut.

B. Straight chain secondary alcohol alkoxylates

Deca-, undeca-, dodeca-, tetradeca., Pentadeca-, octadeca-, and nonadeca-ethoxylates of 3-hexadecanol, 2octadecanol, 4-eicosanol, and 5-eicosanol which have an HLB within the range mentioned herein memory, are viscosity and / or dispersibility modifiers useful in the context of the present invention. Examples of secondary ethoxylated alcohols useful in the present invention as modifiers of the viscosity and / or dispersibility of the compositions are: C16 EO (11); C20 EO (11); and C16 EO (14).

C. Branched chain alkoxylates

The branched chain primary and secondary alcohols that are available from the well known "OXO" process can be ethoxylated and used as modifiers of the viscosity and / or dispersibility of the compositions in the present invention.

D. Polyol based surfactants

Suitable polyol-based surfactants include sucrose esters such as sucrose monooleates, alkyl polyglucosides such as stearyl monoglycosides and stearyl triglucoside, and alkyl polyglycerols.

The nonionic surfactant is preferably present in an amount of 0.01 to 10%, more preferably 0.1 to 5%, more preferably 0.35 to 3.5%, for example 0.5 to 2% by weight, based on the total weight of the composition.

Co-active softeners

In fabric care compositions in the rinse cycle, co-active softeners can also be incorporated in an amount of 0.01 to 20% by weight, more preferably 0.05 to 10% by weight, based on the total weight of the composition. Preferred co-active softeners include fatty esters, and fatty oxides.

Preferred fatty esters include fatty monoesters, such as glycerol monostearate (GMS). If the GMS is present, then it is preferred that the level of GMS in the composition is 0.01 to 10% by weight, based on the total weight of the composition.

The co-active softener may also comprise an oily sugar derivative. Suitable oily sugar derivatives, their manufacturing methods and their preferred amounts, have been described in WO-A101 / 43361 from page 5 line 16 to page 11 line 20, the disclosure of which is incorporated herein.

Polymeric viscosity control agents

It is useful, although not essential, that the compositions comprise one or more polymeric viscosity control agents. Suitable polymeric viscosity control agents include anionic and cationic polymers, such as hydrophobically modified cellulose ethers (e.g., Natrosol Plus, ex Hercules), cationically modified starches (e.g., Softgel BDA and Softgel BD, both former Avebe). A particularly preferred viscosity control agent is a cationic methacrylate and acrylamide copolymer, available under the Flosoft 200 brand (ex SNF Floerger).

Non-ionic and / or cationic polymers are preferably present in an amount of 0.01 to 5% by weight, more preferably 0.02 to 4% by weight, based on the total weight of the composition.

Additional Optional Ingredients

Other optional non-ionic, bactericidal, soil release softening agents may also be incorporated into the tissue care compositions in the rinse cycle.

Such compositions may also contain one or more optional ingredients conventionally included in liquid fabric conditioning compositions in the rinse such as pH buffering agents, fluorescers, dyes, hydrotropes, anti-foaming agents, anti-redeposition agents, polyelectrolytes, enzymes, optical brightening, anti-shrinkage agents, anti-staining agents, antioxidants, sunscreens, anti-corrosion agents, agents that confer coverage, antistatic agents, ironing assistants and dyes.

The lubricating and particulate phases of the compositions of the invention may be in a completely dispersed, partially flocculated or associated state in the form of a Pickering emulsion in which the particles sculpt the surface of the emulsion, or in droplets of liposome to form a compound. of droplets-nanoparticles - sculpted particles.

Preparation

The composition can be prepared according to any suitable procedure. In one procedure, the dispersion of nanoparticles plus the emulsion or microemulsion of lubricant, if necessary, can be postdosed in the fabric softener base after being manufactured with minimal agitation to prevent flocculation.

In another addition procedure, the nanoparticle phase, at the required level, can be post-dosed in a conditioner for the existing prepared tissue in stock.

Product form

The product preferably comprises a liquid, preferably an aqueous liquid.

Product use

The composition can be a fabric care composition in the rinse cycle for use in a conventional automatic washing machine.

Summary of the drawings

Figures 1a and 1b represent a standard Wrinkle Recovery Tester Instrument, Model 155, commercially available from James H Heal & Co. Ltd.,

Figure 2 depicts images of the existing AATCC Scale,

Figure 3 depicts images of a new U-scale, and

Figure 4 is a diagram representing the comparison of the AATCC Scale with the new U Scale.

Wrinkle evaluation with use

It has been found that the traditional Fold or Wrinkle Recovery Angle (CRA) option to characterize the anti-wrinkle compositions of the invention, ie the AATCC66-1990 (see EP-A-1096060) is largely irrelevant to find out the wrinkle with use. In the wrinkle for use, folding and deformation are of interest, and these are not measured by CRA.

Many standard procedures have been described in the textile industry (Association of American Textile Chemists and Colorists - AATCC) to generate and measure wrinkling on tissue.

The AATCC 128 Wrinkle Recovery Test is the one that is most widely used to determine the wrinkle recovery of clothing and is the one that appears most widely referenced in the external literature. A test tissue is wrinkled under standard loading conditions, weather and environmental conditions using a standard Wrinkle Recovery Tester model 155 supplied by James H Heal & Co Ltd. (Figure 1). The wrinkled status level is visually graded with reference to a standard 3D model scale, WR1-WR5, where WR1 = no wrinkle recovery and WR5 = full recovery, which uses a defined lighting equipment. Figure 2 shows this 3D AATCC 128 wrinkle scale.

However, the existing 3D AATCC 128 scale is not ideal when checking fabrics for wrinkling with use for the following reasons.

Existing AATCC 128 3D standards cannot allow a panelist to distinguish fine differences in wrinkle intensity. For example, in the wrinkle for use, the wrinkle range falls around 2.5 to 3.5 but the scale 128 covers the wide discharge scale from 1 to 5, missing details in the range of 2.5-3, 5 of interest.

Therefore, there is a need for a more relevant scale to find out the intensity of wrinkling with good discrimination.

The new scale, called the U scale in the following, emerged from images of wrinkled monitors of woven cotton poplin, using the Model 155 Wrinkle Recovery Checker, with respect to a severity between 0 = nothing wrinkled (flat) and 10 = severely wrinkled as shown in Figure 3. This scale therefore covers a wider spectrum of mid-range wrinkles, allowing panelists to discriminate fine details in a systematic way.

Compared to the AATCC 128 scale, which shows a fairly flat region of insensitivity around a score of 3, the new U scale allows discrimination between wrinkling intensities around that region. Figure 4 shows the comparison between the two scales graphically.

Methodology

1. Monitor preparation

The test solution was prepared with the desired resistance or% owf (on the weight of the fabric) desired and stabilized overnight on a roller bench.

The monitor was then weighed (W1), soaked in the test solution and compressed between the Warner Mathis AG condenser rollers so that its weight was twice its original weight.

The monitor was allowed to dry at controlled temperature and RH (20 ° C / 65% RH) for 24 hours, and then weighed again (W2).

The weight of additive on the monitor is (W2 - W1) from which the% owf can be calculated.

The dry monitor was flattened by ironing using the Philips Azur 4000 iron in the hottest position and with the highest steam arrangement, and allowed to condition for 24 hours at controlled T and HR (20 ° C / 65% RH).

Six such monitors were prepared per treatment.

In each test there are control monitors for comparison with the monitors treated with the composition. These control monitors were treated with demineralized water instead of the compositions, and prepared in the same way.

2. Wrinkle

To generate the wrinkled state, the monitors were loaded into a Model 155 Wrinkle Recovery Checker, so that the warp direction was vertical. The tissue was compressed (wrinkled) then without the use of any additional weight, for 8 minutes.

After wrinkling, the monitors were hung for 24 hours at 20 ° C / 65% RH.

3. Monitor evaluation

A digital photograph of each monitor was taken using a Nokia Digital Camera under identical lighting conditions. Standard lighting conditions were achieved using a Verivide Wrinkle Imaging Closet.

The images were loaded into a paneling program and each image was presented to the panelist to rate the images of the scale being used - either the AATCC128 or the U-scale.

5 Six trained panelists scored all monitors for wrinkle intensity in relation to scale.

In each test, six untreated control monitors were prepared and crumpled exactly the same

10 so that the monitors treated as described above, to allow a comparison with the compositions.

The invention will now be illustrated by the non-limiting examples that follow. Additional modifications will be apparent to those skilled in the art. The samples of the invention are represented

15 through a number. Comparative samples are represented by a letter. All values are weight percentages of the active ingredient unless otherwise indicated.

Examples

The formulations in Table 1 below were prepared by co-mixing softening material for quaternary ammonium tissue, tallow alcohol, and hot, non-ionic water, and adding the co-mixture to the water under stirring until a mixture formed. homogeneous, allowing the mixture to cool and then adding the dye / perfume and the preservative at 40 ° C. The mixture was allowed to cool further and then the silica dispersion was post-dosed with stirring.

25 Table 1

Ingredient

Example 1 Example 2 Example A

Tetranyl AHT-1 (1)

14.94 6,035 14.94

Genapol C200 (2)

0.38 0.10 0.38

Hydronol D (3)

1.00 0.20 1.00

silica (4)

10.96 4.43 ---

polymer (5)

--- 0.030 ---

Dye / perfume / preservative

 Minor Minor Minor

Water

up to 100 up to 100 up to 100

(1) Tetranyl AHT-1 is a fully hardened tallow triethanolamine quaternary fabric softener

supplied by KAO at an active level of 85%. 30

(2)

 Genapol C200 is a (C9-C11) 20EO non-ionic coconut (Clariant).

(3)

 Hydrogenol D (Cognis) is a fully hardened vegetable derived C16-C18 fatty alcohol.

35 (4) C820 is a dispersion of silica at 11% in water (Ciba) with silica particles 22 nm in size. The amounts in the table show the amount of silica.

(5) Natrasol 331 is a hydrophobically modified ethyl cellulose hydroxy.

The formulations of Examples A and 1 were wrinkled tested and compared with the application of silica and water dispersion. The results are shown in table 2.

Table 2. Wrinkle score AATCC128 after 24 hours for combined tissue conditioner formulation with C820 silica sample for a deposition of 0.3% owf. The HIGHER the score, the less the monitors have crumpled

Example A

Example 1 silica (C820) Water

Quat ratio: silica

1: 0 1.3: 1 0: 1 Control

Punctuation

 2.86 3.39 3.53 3.17

As the results in Table 2 show, the treatment with tissue conditioner formulation itself

(Example A) provides a small or no benefit on wrinkling with use as demonstrated by comparison with water control. However, the combination of fabric conditioner with silica particles according to the invention offers an improved benefit in terms of wrinkling with use.

5 Silica itself provides the flattest state corresponding to the least wrinkle with use. However, tissue handling is too rough, abrasive with silica alone.

Table 3 characterizes the tissue management obtained using the formulations. A lower 2HG5 score means that there is a more elastic response when a shear force is applied to the treated tissue. 10 A lower G score means that a lower level of stiffness is experienced when a shear force is applied.

Table 3. Kawabata shear hysteresis (2HG5) and shear stiffness (G) data

% owf

Example A Example 1 Silica (C820) Water control

0.3% (2HG5)

10.60 6.30 12.36 10,807

0.3% (G)

1.98 1.68 2.49 2.00

15 The results show that the lubricant / silica combination (example 1) provides the desirable softness and smoothness of the fabric.

The formulations listed in Table 4 below were prepared by mixing a dispersion of silica with

20 ready-made fabric conditioning compositions. The silica dispersions were Ludox SP532-10519, a 40% silicone dispersion with a particle size of 50 nm, former Grace Davison. The tissue conditioning compositions were:

Henkel Vernal Blue sky fabric conditioner, containing 13.9% by weight of a 25-based fabric softener in a partially hardened triethanolamine quaternary ammonium compound,

Unilever Comfort Blue fabric conditioner, which has a composition like that of Example A.

Table 4. Wrinkle formulations and U-scale scores for treated (conditioned) tissue with 30 quat: silica mixtures (Ludox SP532-10519) at 5% owf one hour and 24 hours after wrinkle. The lower the score, the less wrinkled the tissue.

Example 3

Example 4 Example 5 Example 6 Example 7 Example 8 Example A

Tissue conditioner

TO TO TO B B B Control

quat weight ratio: silica

1: 1 1: 2 2: 1  1: 1 1: 2 2: 1 1: 0

1 hour

3.50 2.72  3.10  2.21  2.32  2.72 4.22

24 hours

2.80 2.38  2.50 2.35  2.17  2.48 3.26

The test of the monitors by an expert panelist showed acceptable handling and smoothness. The ease of ironing the quat: silica mixtures was comparable to that of the commercial Comfort fabric conditioner.

Another class of lubricant-particle mixtures belonging to the DQ Corning MQ silicone resin class is shown in Tables 5 and 6. The intensity of wrinkling has been reduced compared to those not treated after 1 hour and 24 at preferred deposition levels.

40 Table 5. Wrinkle scores on the U scale after 1 hour and 24 hours for o / w emulsion of silicone oil / silicone resin mixtures using cationic emulsifier Table 6. Wrinkle scores on the U scale after 1 hour and 24 hours for o / w emulsion of silicone oil / silicone resin mixtures using non-ionic emulsifier

PDMS / silicone resin mixture ratio (cationic emulsifier)

 % owf

40/60  30/70  20/80 Without treating

1 hour score

24 hour score  1 hour score 24 hour score  1 hour score 24 hour score  1 hour score 24 hour score

0.1

3.71  2.97  3.17  2.61  3.25 2.49  3.60 2.88

0.25

3.08  2.49  2.78  2.29  2.40 1.93  3.60 2.88

PDMS / silicone resin mixture ratio (non-ionic emulsifier)

 % owf

40/60  30/70  20/80 Without treating

 1 hour score

24 hour score 1 hour score 24 hour score 1 hour score 24 hour score 1 hour score 24 hour score

0.1

2.67  1.67  2.15  2.08  2.75 2.38  3.58 2.89

0.25

1.83  2.14  2.92  2.25  3.58 2.38  4.00 2.89

5 In Tables 5 and 6, the composition of the internal phase of the emulsions is the same. These differ in the type of surfactant used for emulsification.

Table 7 shows the composition of the oil and water phases of the emulsions. PDMS / resin mixtures 10 in D5 (a low molecular weight silicone oil solvent) are mixed with water and emulsifier (not shown in table 7).

Table 7: Composition of PDMS / resin mixture in emulsions.

Ingredient

 % in composition

Water

 fifty

D5

 25

PDMS / Resin Blend

25

The siloxane resin consists of monovalent trisiloxy groups (M) having the formula R3SiO12 and tetravalent siloxy groups (Q) having the formula SiO4 / 2 and the polymer is functionalized PDMS amino with some degree of OH termination of viscosity 4000 mPas.

20 Table 8 provides the droplet sizes of the resin mixture emulsions used in tables 8 and

9.

Table 8. PDMS emulsion droplet size / silicone resin polymer

PDMS / MQ mix ratio

Type of surfactant PSD (mm)

40/60 30/70 20/80 40/60 30/70 20/80

Nonionic Nonionic Nonionic Cationic Cationic Cationic 139 129 161 116 154 139

Monitors treated with silicone resin mix showed better smoothness and handling compared to silica at the same level of aggregation. Its ease of ironing was also increased compared to silica.

Claims (19)

1. A composition for the treatment of tissues, for use in the rinse cycle of a washing machine to reduce wrinkling by use on fabrics, the composition comprising: a) a nanoparticle dispersion comprising particles having an average particle size in the range of 5 to 500 nm, b) a lubricant phase selected from a cationic fabric softener, a silicone oil, a sucrose polyester oil and mixtures thereof, and c) water, wherein the ratio of a): b) is in the range of 3: 1 to 1: 3, and in which the nanoparticle dispersion is a cationic or neutral colloidal silica dispersion.

2.

 A fabric treatment composition as claimed in claim 1, wherein the weight ratio of a): b) is in the range of 2: 1 to 1.5: 1.

3.

 A composition for the treatment of tissues as claimed in claim 1 or claim 2, wherein all particles of the nanoparticle dispersion have a particle size of less than 500 nm.

Four.

 A composition for the treatment of tissues as claimed in any preceding claim, wherein all particles of the nanoparticle dispersion have a particle size of less than 100 nm.

5.

 A composition for the treatment of tissues as claimed in any preceding claim, wherein the particles of the nanoparticle dispersion have an average particle size in the range of 10 to 50 nm.

6.

 A fabric treatment composition as claimed in any preceding claim, wherein the silicone oil comprises polydimethyl siloxane.

7.

 An aqueous fabric softener composition as claimed in any preceding claim, wherein the fabric softening compound is a quaternary ammonium compound.

8.

 An aqueous fabric softener composition as claimed in claim 7, wherein the fabric softener compound comprises a quaternary ammonium compound with ester linkages.

9.

 An aqueous fabric softener composition as claimed in claim 8, wherein the fabric softening compound comprises a tallow-based ammonium triethanolamia compound.

10.

 An aqueous fabric softener composition as claimed in any preceding claim, wherein the sucrose polyester is derived from palm oil or soybean oil.

eleven.

 An aqueous fabric softener composition as claimed in any preceding claim, wherein phase b) lubricant is present in an amount of between 0.5 and 20% by weight of the composition.

12.

 An aqueous fabric softener composition as claimed in any preceding claim, further comprising a fatty alcohol or a fatty acid containing from 8 to 22 carbon atoms.

13.

 An aqueous fabric softener composition as claimed in claim 12, comprising between 0.3 and 2% by weight of a C16-C18 fatty alcohol.

14.

 An aqueous fabric softener composition as claimed in any preceding claim, further comprising between 0.01 and 10% by weight of a non-ionic surfactant.

fifteen.

 An aqueous fabric softener composition as claimed in claim 14, wherein the non-ionic surfactant is an addition product of ethylene oxide and / or propylene oxide with a fatty alcohol, a fatty acid or a fatty amine.

16.

 A method of treating a fabric, comprising applying a composition as claimed in any preceding claim in an amount that deposits between 0.2 and 4 percent by weight of the total particulate phase and the lubricating phase, and Dry the tissue next.

17.

 A method as claimed in claim 16, wherein the composition is applied in an amount such that it deposits between 0.5 and 2 percent by weight of the total particulate phase and the lubricating phase.

18.

 A method as claimed in claim 16 or claim 17, wherein the composition is applied during the rinse cycle of a washing machine.

19.

 A method as claimed in any one of claims 16 to 18, comprising the additional step of ironing the tissue.