Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
  • D06M23/12—Processes in which the treating agent is incorporated in microcapsules
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
  • D06M23/08—Processes in which the treating agent is applied in powder or granular form

Definitions

• the invention relates to a method for equipping fibers and textile fabrics with loadable microspheres.
• EP 1,600,210 Al describes loaded microspheres. It involves loading microspheres with active ingredients and then applying the loaded microspheres to textile surfaces where they are physically adsorbed without the use of binders. Although a certain resistance to washing is given in this technical solution, but this does not meet the highest requirements.
• WO 2006/015718 A1 describes fibers and fabrics which are characterized by being blended with mixtures of (a) hydrophobic actives and (b) binders.
• drugs without the mediation of microcapsules or the like are applied to textile surfaces, but not directly, but by means of film-forming polymers (binders).
• This technical solution lacks a controlled release of the active ingredients.
• wash permanence is to be understood that the above-mentioned desirable properties of the textiles are lessened by washing only to a limited extent.
• the dispersion prepared in step (1) is diluted with water in step (2).
• Step (1) has the purpose of producing an aqueous dispersion of the microspheres (a), it being understood that it is a solid dispersion.
• step (2) textile is introduced into the dispersion thus prepared.
• step (3) is achieved by lowering the pH, that the dispersants are converted into the acidic form; as a result, they lose their dispersing activity with the result that the microspheres (a) virtually "precipitate", which they do in such a way that they deposit on the textile.
• Step (4) has the purpose of making the microspheres (a) applied to the fabric in step (3) wash-permanently bond to the textile.
• the alkali and / or alkaline earth metal soaps of fatty acids of 6 to 24 carbon atoms used in step (1) are selected to have an HLB value in the range of 8 to 25.
• the alkali and / or alkaline earth metal soaps of fatty acids having 6 to 24 carbon atoms are prepared in situ by reacting the desired microspheres (a) with one or more fatty acids having 6 to 24 carbon atoms. Mixed atoms, then added water and the fatty acids by addition of alkali and / or alkaline earth metal hydroxides in the corresponding soaps transferred.
• the dispersion prepared in step (1) contains 1 to 90% by weight, based on the total dispersion, of microspheres (a).
• the dispersion prepared in step (1) preferably contains from 10 to 70% by weight and in particular from 30 to 60% by weight, in each case based on the total dispersion, of microspheres (a).
• liquor ratios set in step (2) are not critical per se. In a preferred embodiment, liquor ratios in the range of 1:10 and 1:15 are set in step (2).
• liquor ratio is known to the person skilled in the art. This is understood to mean the ratio of the amount of textile to the volume of water in the machine used for the equipment.
• the invention is not subject to any particular limitations with regard to the acids to be used in step 3, provided that it is ensured that these acids are capable of converting the alkali and / or alkaline earth metal soaps of said fatty acids used as dispersants into the free fatty acids.
• the acid from the group acetic acid, lactic acid and glycolic acid is selected in step (3).
• the lowering of the pH in step (3) is preferably carried out slowly. This ensures that the microspheres (a) are applied to the textile in very high quantities.
• the lowering of the pH in step (3) takes place at a rate such that the microspheres (a) are applied to the textile in amounts of at least 70% and in particular of at least 80%, based on the total amount in the liquor existing microspheres (a) - takes place.
• microspheres (a) may be unloaded or partially loaded with drugs or fully loaded. They fulfill the function that they can be loaded by the user as desired and, after release of the active ingredients, can also be reloaded as desired.
• Absorbent microspheres are structures that have a largely homogeneous structure.
• the absorbent microspheres used in the context of the present invention have the property of being able to take up active substances and also release them again, with both occurring several times can, ie agents can be absorbed by loading or reloading and released over time again. Because of this property, these microspheres are referred to as absorbent microspheres.
• the active substances can be adsorbed on the surface of the microspheres and / or dissolved in the microspheres and / or incorporated in the microspheres, for example in fine channels.
• Microspheres are dimensionally stable, ie they are not destroyed in the release of the active ingredients. It should be expressly stated that microcapsules, which are indeed destroyed in the release of the active ingredients, are
• microspheres are fixed by - one or more - film-forming polymers on the textile surface, resulting in a relative to the prior art, relative improvement of the washing permanence.
• microspheres are preferably spherical in shape, but are not limited in geometry to spheroidal shape, but may have other spatial shapes, for example, they may represent rotatiosellipsoids or have a rod shape.
• the microspheres preferably have an average particle size in the range of 1 to 15 microns, and more preferably 5 to 10 microns.
• microsphere based on polymethylmethacrylate is used.
• PMMA polymethylmethacrylate
• examples are, for example, Covabead LH 85 or LH 170 from the company LCW or Cosmedia PMMA V8, Cosmedia PMMA V 12 or Cosmedia SILC from Cognis.
• silicone-based or SiO 2 -based microspheres are used.
• examples are "Dow Corning 9509 Silicone Elastomer Suspension” from Dow Corning.
• microspheres based on polymethylmethacrylate are used.
• Suitable polyurethanes (PU) and polyethylvinyl acetates (EVA) are, for example, the commercially available products from the Cognis 3011-A or Cognis 3009-A range from Cognis.
• Polymeric melamine compounds Melamine (synonym: 2,4,6-triamino-1,3,5-triazine) is usually formed by trimerization of dicyandiamide or by cyclization of urea with elimination of carbon dioxide and ammonia.
• melamine refers to oligomeric or polymeric condensation products of melamine with formaldehyde, urea, phenol or mixtures thereof.
• glyoxals are understood as meaning the self-condensation products of glyoxal ("polyglyoxals").
• Silicone compounds are, for example, dimethylpolysiloxanes, methylphenylpolysiloxanes, cyclic silicones and amino, fatty acid, alcohol, polyether, epoxy, fluorine, glycoside and / or alkyl-modified silicone compounds which are preferably solid or resinous at room temperature.
• simethicones which are mixtures of dimethicones having an average chain length of from 200 to 300 dimethylsiloxane units and hydrogenated silicates.
• aminosiloxanes for example Cognis 3001 from Cognis. Their further crosslinking with H-siloxanes, eg Cognis 3002 from Cognis, can further increase the performance as a binder.
• Poly (meth) acrylates are homo- and copolymerization products of acrylic acid, methacrylic acid and optionally their esters, especially their esters with lower alcohols, such as methanol, ethanol, isopropyl alcohol, the isomeric butanols, cyclohexanol and the like to understand which are obtained in a conventional manner, for example by free-radical polymerization under UV irradiation.
• the average molecular weight of the polymers is between 100 and 10,000, preferably 200 and 5,000 and especially 400 to 2,000 daltons.
• the binders (b) - based on the component (a) - in amounts of 0.5 to 15, preferably 1 to 10 and especially 1 to 5 wt .-% applied to the fibers.
• Component (a) is to be understood as meaning the microspheres in unloaded form.
• active ingredients that are intended to load the microspheres are not critical per se and depends exclusively on which effect is to be effected on the skin.
• active ingredients are preferred which have moisturizing properties or counteract cellulite.
• Typical examples are tocopherol, tocopherol acetate, tocopherol palmitate, carotenes, caffeine, ascorbic acid, (deoxy) ribonucleic acid and their fragmentation products, ⁇ -glucans, retinol, bisabolol, allantoin, phytantriol, panthenol, AHA acids, amino acids, ceramides, pseudoceramides, chitosan, dihydroxyacetone , Menthol, squalane, essential oils (eg lavender oil, lemon oil, eucalyptus oil or peppermint oil), vegetable oils (eg Monoi de Tahiti, shea butter, almond oil, passion fruit oil, rosehip seed oil or apricot oil), vegetable proteins and their hydrolysis products, plant extracts, such as Extracts of Ginkgo biloba, Camellia sinensis, Trifolium pratensis, Oleacea europensis, Litchi sinensis, Valeriana oficinalis, Medicago s
• the active compounds from the group formed by essential oils, vegetable oils, squalane, chitosan, menthol, retinol (or vitamin A), caffeine, vegetable or animal proteins and their hydrolysis products, carotenes and jojoba oil.
• These have a very broad property profile and contribute individually or in combination to the balance of the cutaneous hydrolipid layer, prevent the loss of water and thus wrinkles, refresh the skin and counteract fatigue, give the skin a soft and elastic feeling, improve skin drainage , the supply of nutrients and blood circulation, work against oxidative stress, environmental toxins, skin aging and free radicals, compensate for the loss of fats caused by water and sun, improve the water resistance of UV filters, ensure a homogeneous tanning and finally also have antimicrobial properties.
• the weight ratio between the component (a) - such as the finely divided PMMA - and the active ingredients is 10: 90 to 99: 1, preferably 3: 1 to 1: 1 and more preferably about 2: 1.
• Example 1 Preparation of a Microsphere Dispersion

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Citations (5)

• 2008
  • 2008-04-11 EP EP08007155A patent/EP2108734A1/fr not_active Withdrawn
• 2009
  • 2009-04-02 WO PCT/EP2009/002410 patent/WO2009124689A1/fr active Application Filing
  • 2009-04-02 EP EP09729486A patent/EP2262944B1/fr not_active Not-in-force

Patent Citations (5)

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