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
  • D06M23/06—Processes in which the treating agent is dispersed in a gas, e.g. aerosols

Definitions

• the present invention relates to methods of and materials for protecting fibers and fabrics or textiles and the like from both fading and other deletereous effects of ultra-violet radiation and from the soiling effects of water, oil and other soiling elements.
• 3,888,821 (disclosing the use of a sub­stituted benzotriazole, benzophenone or triazine, for example, absorbed in an aromatic polyamide fiber); 3,379,675 (disclosing benzotriazole and a tris-phenol, for example, for stabilizing polyether-based spandex fibers); and 4,251,433 (disclosing the coating of the extruded organic fibers or other articles with heterocyclic ester ultra-violet stabilizers).
• the mechanism for such screen­ing action is believed to reside in one or more of filter­ing action or preferential absorption of deleterious inci­dent wavelengths with dissipation through heat fluores­cence or similar phenomena.
• UV-screening compounds are "spun-in” prior to fiber extrusion, some­times “dyed in”, sometimes “coated-on”, and sometimes microdispersed. Similar compounds have also been used for UV-absorption when applied to the human skin (U.S. Letters Patent No. 3,004,896, for example) and to photographic dye images and the like (Nos. 4,447,511 and 4,308,.328, as illustrations).
• Underlying the present invention is just such a dis­covery wherein it has surprisingly been found possible to combine ultra-violet screening agents and water, soil and grease-repelling agents as a thin film fabric finish or spray deposition or the like, without impairing the UV or stabilizing or absorbing properties imparted by the former or the efficacy of the repellency properties imparted by the latter and without deleterious chemical interaction or impaired adhesion even though combined together in such thin film.
• An object of the invention accordingly, is to pro­vide a new and improved method of and composite material for simultaneously imparting ultra-violet screening and absorbing properties and fluid and soil repellent proper­ties to organic and related fibers and fabrics or tex­tiles, and without sacrificing the desired hand, colora­tion, flexibility or other original properties of the same.
• a further object is to provide a thin solidified admixed layer or coating imparting such novel properties.
• the invention provides a method of simul­taneously providing UV screening and fluid and soil repellent properties to organic fibers, fabrics and the like, that comprises, combining a fluid and soil repellent solution with a UV screening compound soluble in and non-­reactive with said solution, thoroughly dissolving the said screening compound in the repellent solution in a ratio range of from 5-30% to 95-70% to provide sprayable particles from a few to several hundred microns (say, 1-300), and spraying the same as a thin deposit upon the fabric.
• the invention provides a novel composition of matter containing an appropriate ultraviolet screening agent combined with a suitable water-repellent coating, formulated so that the composition can be applied to the surface of a variety of substrates, especially dyed fabrics, to protect them simultaneously from photodegrada­tion and from staining as by various soiling agents, with the composition being applied by spraying or coating, to maximize efficiency.
• Preferred and best mode steps and materials are hereinafter set forth.
• underlying the invention is the discovery that a particular combining of ultra-violet screening agents and fluid and soil repellent agents, and the thin film application thereof to preferably organic fiber fabric or textile materials, for example, can result in the simultaneous imparting of both fade-resistant (and other deterioriation) properties and resistance or repellence to wetting or soiling.
• preferred composi­tions comprise from about 2% to 30% of the screening agent (preferably hydroxyl benzotriazoles) in about 98% to 70% of preferably a binder as of the fluorinated type used in 3M's "Scotchguard” trademark product (see, for example, 3M U.S. Letters Patent Nos. 3,981,928 and 4,043,923) or Dupont's polyfluorinated polymers marketed under the trademark "Teflon".
• the screening agent preferably hydroxyl benzotriazoles
• a binder as of the fluorinated type used in 3M's "Scotchguard" trademark product (see, for example, 3M U.S. Letters Patent Nos. 3,981,928 and 4,043,923) or Dupont's polyfluorinated polymers marketed under the trademark "Teflon”.
• hydroxy-­benzophenones e.g., Cyasorb 24, sold by American Cyanamid Co., etc.
• fluorinated binders as well as binders which lack fluorine, but possess similar functional pro­perties, i.e., hydrophobic character (e.g. polystyrene methyl methacrylate), can also be used.
• the weight per­centage is based on solid binder, which may contain a plasticizer.
• the spray composition may contain a fugitive dye which will permit the user to determine which areas of the surface have been sprayed.
• useful fugitive dyes are conven­tional indicator dyes, in combination with a volatile base, e.g., a mixture of phenpohthalein with ammonia, or well-known oxygen-reactive color fading dyes.
• the fabric was subjected to ultra-violet rays from a carbon arc lamp for 100 hours with noticeable improvement in fading properties. Water and oil droplets applied to the protected fabric were readily wiped off without strain both before and after the UV tests.
• Tinuvin 343 Another Ciba-Geigy o-hydroxyphenylbenzotriazole UV absorber (“Tinuvin 343”) was mixed in the same "Scotch­ guard” type repellent solution of Example 2 (20% solids) and stirred to get all of the UV-absorber into solution, but in the ratio of 2 grams of T-343 to 50 grams of repellent solution.
• the solution was placed in a 100 ml bottle attached to a Chromist Spray apparatus (Gelman Instrument Co., Ann Arbor, Michigan), and a fine spray of several micron particle size was directed on dyed fabric (of nylon and cotton and polyester fibers) of red, blue and yellow colors for comparison with (1) unsprayed areas of the fabric and (2) unsprayed fabric areas fronted with an opaque cardboard layer.
• a screening agent of o-hydroxybenzophenones ("Cyasorb 24" of American Cyanamid Co.) dissolved in "Scotchguard” fluorinated binder in the ratio of 7 to 93%, and spray­dried upon fabric.
• Example 3 The formulation of Example 3 with a fugitive dye indicator (phenophthalein-ammonia) to show the sprayed areas combined with an ammonia volatile base.
• a fugitive dye indicator phenophthalein-ammonia
• thymolphthalein indicator may be used that changes from blue to colorless on pH change.
• UV screening elements of the type of the T-109 and T-343, etc. preferred limits of weight per square foot are from about 0.1 gm/ft2 to about 1 gram, if slight yellowing is not desired. For brown or red colored fabrics that do not show the yellowing or shade shift, up to several grams can be used.
• the preferred limits of the "Scotchguard" type repellent is from a few tenths to about 3 grams/ft2 depending upon the degree of repellency pro­tection desired.
• the dried spray particle combination layer indeed, appears to make more effective use of the UV absorber than without the repellency product combined therewith.

Landscapes

• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)
• Biological Depolymerization Polymers (AREA)

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Publications (3)

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Cited By (6)

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Citations (5)

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• 1987
  • 1987-07-22 JP JP62183227A patent/JPS6375178A/ja active Pending
  • 1987-07-23 AT AT87306530T patent/ATE88514T1/de not_active IP Right Cessation
  • 1987-07-23 DE DE8787306530T patent/DE3785519D1/de not_active Expired - Lifetime
  • 1987-07-23 EP EP87306530A patent/EP0257800B1/fr not_active Expired - Lifetime

Patent Citations (5)

Non-Patent Citations (3)

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