PROCEDURE FOR THE LOE FLUORESCENCE OF OPTICAL ONES AUFHELLERN.

The invention concerns a procedure for L6 or Unterdr0cken of the fluorescence of with optical Aufhellern of treated substrates the effect of the optical Aufheller more cder which can be treated been based as well known on their F&higkeit to absorb and deliver in the blue to violet range of the spectrum again than fluorescence radiation for the human eye invisible UV light. By these additives blue radiation is compensated that somewhat yellowish basic white by textiles or other substrates; the optical Aufheller of containing substrates appears thereby to the human eye whiter than without optical Aufheller. The optical Aufheller becomes from there to large extent the improvement of the instruction its printing of textiles, paper, leather, coating materials, pigments etc. eingesetzt.

There are however F&lle, in those the presence of the optical Aufheller extraordinarily start. For example, if an optical Aufheller containing textile property is fiberf&rbt or printed on, the general impression of the color at the daylight from the adsorption sits down to that or used coloring materials (s) and the fluorescence radiation of the optical Aufhellers together. During view of the F rbung or the pressure in the GI0hlampenlicht (Normlichtart O), which lt practically no UV-RADIATION enth, this fluorescence radiation is then missing, and the observer notices a strong Anderung one of the Farbtones.

The subject of the invention is characterized a procedure for L6 or Unterdr0cken of fluorescence treated by with optical Aufhellern or to treating substrates, by the fact that one applies an UV absorber on these substrates before or after the optical AufheIlen and fixiert.

By UV absorbers substances are understood, the light waves in the N&he of the UV range (< 400 Nm, particularly between 250-350 Nm) strongly absorb, without they emit daf0r LiGht of other Wellenl&ngen. Suitable UV absorbers are for example Benzotriazole, like 2 (2Hydroxy-3-tert. - butyl-5-methylphenyl-5-chlorbenzotriazol, Benzophenone like the 2-Hydroxybenzophenon and derivatives if necessary in the 2 ', 4.4 ' and/or 5-Stellungen substitutes, for example the 4-Chloro-2,2',4' trihydroxybenzphenon, 2.2 ', 4-Trihydroxybenzophenon, 2,4-Dihydroxy-4 " - methoxybenzophenon, 2.2 ', 4.4 ' - Tetrahydroxybenzophenon, 2,4-Dihydroxy-benzophenon, or 2-Hydroxy-4-methoxy-benzophenon, Benzoes6urederivate such as Benzoes&ureresorcinmonoester, Salicylate such as Salicyls ure-4-CH2 - more alkylphenylester, Dibenzoylbenzolderivate such as p-Di (4hydroxysalicyloyl) - benzene or 2,4-Dibenzoylresorcin, derivatives - Cyanoacryls&ureester and Benzylidenmalodinitrile etc. such UV absorbers are well-known and for example in US patent specifications 3,214,463 and 3,383,241, DE-AS 1,101,437 and 1,213,407 and GB-patent specification 796,003 beschrieben.

It k6nnen also mixtures of UV absorbers assigned werden.

The UV absorber becomes favourable by a w ssrigen medium on the substrate aufgebracht.

If the UVoAbsorber wasserunl6sliche of products is, k6nnen her as emulsions or dispersions in water to be used. The emulsions are manufactured favourably, index of the UV absorbers in a L6sungsmittel, for example White Spirit, gel6st will and this L6sung in presence of a emulsifying means with water are preferably shifted. Preferential emulsifying center] are nichtionogene emulsifying agents as for example Alkoxylierungsprodukte, preferably &thoxylierte Ce-zo alcohols, C4-12 alkyl-substituted phenol, C8-20 Fetts&ure or Rizinus61. Preferably contained those not ionoge.nen emulsifying means from 5 to 50, spezie] l 5 to Athylenoxyeinheiten. The UV absorber can also, as already erw&hnt, when a w&ssrige dispersion of small particles, if necessary into presence of a Dispergators, is used. Suitable Dispergatoren is for example such, which are used for dispersion coloring materials, for example Ligninsulfonate or formaldehyde/Naphthalinsulfons: Iure Kondensate.

Erfindungsgem&ss can be applied and fixed the UV absorber after all well-known Methcden of the F&rbens or printing on, like treatment in the long bath at temperatures yon 20 to 140°C, Impr&gnieren and staying with Raumoder erh6hter temperature, for example between 20 and 90°C w hrend 30 minutes until 48 hours depending upon temperature, Foulardieren and fixing by effect of saturated steam, 0berhitztem steam, hot-air, treatment with Hochfrequenzoder contact heat, on the substrate. Also the UV absorber can be used in the so-called thermography. Further the UV absorber cannot by switching of organic high polymers, for example in the form of w&ssrigen or w&ssrigen paints or according to the method of the pigment printing fixed on the substrate werden.

The choice of the applications and the fixing method and the quantity of the UV absorber depend on the 8ubstrat, the used coloring materials, the optical Aufhellern and their genuinenesses and the characteristics of the used UV absorbers. Generally good L6scheffekte is received, if the UV absorber used in a quantity from 0,1 to 5% of the goods weight wird.

As already erw&hnt, the UV absorber can invention in accordance with ss after optical brightening up, and/or forwards, w&hrend or after the F&rben or printing one on with an optical Aufheller of treated substrate to be used. The treatment with the UV absorber can take place also forwards, w hrend or after the F&rben or printing on, before the substrate concerned is treated with an optical Aufheller. This is e.g. the case with BekleidungsstQcken, which are washed after the use. Handels0bliche detergent or soaps fQr the household contains today mostly optical Aufheller, around W& washed with it appears whiter too leave/> 3 CH 677 167G A3 4 now with such detergents welfare-colored gef&rbte and/or printed on textiles washed, then another colour than before results after drying. This particularly becomes within the yellow-beige range beanstandet.

Erfindungsgem&ss can be applied the UV absorber also before or after the treatment with the optical Aufheller by printing on according to well-known methods 0rtlich sample in accordance with ss on the substrate. Thus will an examination, which becomes visible only with illuminating with UV light, is used like it for example in the theatre or in Discotheken, erreicht.

Depending upon applied procedures the optical clarification effects become 0rtlich or on the whole Fl&che gel0scht or unterdr0ckt. This optical Aufheilungseffekte is by handels0bliche optical Aufheller to be produced, for example well-known anionische or kationische optical Aufbelier as well as dispersion on Heller like it in detergents, for the pretreatment of the cotton or other nat0rlichen or synthetic fibers or for optical brightening up yon paper or from synthetic fibers in the mass, be used. AIs of examples yon soIchen Aufheilern are derivatives of the until (triazinylamino) - stilbendisulfons ure, TriazolyI derivatives of Stilbensulfons uren, to (stilben) - connections, Pyrazolin, Cumarin, to (benzimidazolyl) -, to (oxyzolyl) -, Naphthalimid, cyanogen in, Benzoxazolylund OxacyaninDerivate genannt.

Invention in accordance with sse procedure can become on all substrates, which were treated with an optical Aufhelter or to become, durchgef0hrt, for example textile materials, paper or Leder.

By textilen materials Game, fabrics, Gewirke or fleeces are e.g. understood. They consist wool, cotton, lines, silk, PP, polyester, acetate, triac budget, Polyacrylnitril, PVC or polyolefins of natQrlichen or synthetic fibers as for example or of mixtures davono the UV absorber zweckm&ssigerweise by preliminary tests are ausgew&hlt, in order to obtain eir optimal L0 or Unterdr0cken of fluorescence. For example for LS fluorescence the treated or to treating polyester substrates, by with optical Aufhellern (Dispersionsaufhellern), are UV absorbers from the Benzotriazolreihe geeignet.

Invention in accordance with sse Veffahren is particularly suitably special for the treatment of synthetic textile materials, Polyestermaterialien.

The following examples serve the Erl&uterung the invention, without limiting it. The temperatures are in centigrades angegeben.

Example 1 a fiber yarn from PES, brightened up optically in the mass, in a Kreuzspulf rbeapparat, with a Flottenverh ltnis by 1:30 with a fleet is treated, those per litre of 0,17 g 2 (2-Hydroxy-3-tert. - butyl-5-methylphenyl) - 5-chlorobenzotriazol in w&ssriger dispersion 0,5 g Ammonsulfat, and 0,3 g glacial acetic acid enth&it.

First the FIotte is heated up within 40 minutes from 40 to 125°. Then the yarn w is treated hrend 30 minutes with 125°. After the Abk0hlen the yarn gesp01t becomes and for the F&rben fertiggestellt.

With regarding the treated material under an UV lamp is no fluorescence more festzustellen.

Example 2 vorg ngig a fabric from 100% PES, brightened up optically with C.I. fluorine cent Brightening agent 330 in the ThermosoI procedure, is printed on, dried with a Streifenmuster, treated w&hrend 7 minutes in 0berhitztem steam by 175°, dried afterwards warmly and coldly gesp01t and. With regarding under an UV lamp a dark Streifenmuster shows up on a bright, bl&ulich white Untergrund.

The used Druckpaste has the following composition:

4 g/kg 2 (2-Hydroxy-3-t. - butyl-5-methylphenyl) - 5chlorbenzotriazol in form of a w issrigen dispersion 400 g/kg 13% a Verdickung on Guar basis (Indalca H 735, manufacturer Cesalpinia Hercules S.A., Bergamo, Italy) and with water on 1000 g gestellt.

Example 3 a chain effect commodity from Pa 66, brightened up optically with C.I. fluorine cent Brightening agent 328 in the ThermosoI procedure, is treated w&hrend 30 minutes at 98° and pH 5 with a FIotte, which, related to the weight of the commodity, lt 0,5% 2-Hydroxy-4-noctoxybenzophenon in form of a L0sung in White Spirit enth, to which as emulsifying agent still another OIs was more urepolyglykolester added. After the treatment becomes with cold water gespOit.

With regarding the treated material under an UV lamp is only a small fluorescence festzustellen.

Example 4 a chain effect commodity from Pa 66, brightened up optically with C.I. fluorine cent Brightening agent 328 in the ThermosoI procedure, is treated w hrend 30 minutes at 98° and pH 5 with a FIotte, those, related to the weight of the commodity, 0,5% 2-Hydroxy-4-methoxy-5-sulfo-benzophenon enth&lt.

After the treatment becomes with cold water gespelt.

With regarding the treated material under an UV lamp is a strong straining course of fluorescence festzustellen.

Example with C.I. a fluorine cent Brightening agent 340 after the batchwise exhaustion optically brightened up CH 677 167G A3 of 6 fabrics from Pa (3 w&hrend 1 hour is treated at 98° and pH 6 with a fleet, those, related to the weight of the commodity, 1% 2.2 ' - Dihydroxy-4-4' dimethoxybenzophenon in form of a w&ssrigen dispersion enth as per after the treatment becomes warm and cold gespSIt.

With regarding the treated material under an UV lamp is only a gednge fluorescence festzustellen.

Example 6 a mesh commodity, made of texturierten yarns from Pa 66, is rbt with a Rottenverh&ltnis by 1:15 according to the following regulation gef:

0,1% C.I. Acid orange 145 1,0% 2.2 ' - Dihydroxy-4,4' dimethoxy-5-sulfonatriumbenzophenon pH 4.5, adjusted with Essigs&ure.

The material is brought in for indiger mechanical movement of 60° into the preparatory bath and under st on 98° with l°/min heated and then still further 30 rain. with 98° gef&rbt. Subsequently, gesp01t becomes once cold and then with approx. 80° getrocknet.

with 50° and Becomes a Tell of in such a way gef&rbten material with 3 g/I a handLSO-bleached fine detergent, which enth&lt optical Aufheller (label name: WoUana, manufacturer ESWA AG, Switzerland) with a Flottenverh&ltnis washed by 1:30 w hrend 30 min. with 40° and afterwards gespSIt and dried, then one observes small when comparing the washed with the unwashed sample only nderung the colour of the washed Probe.

If the same F&rbung without additive of the Benzophenons is manufactured and subjected then to the before described wash process, then one observes strong when comparing washed with the not-washed sample nderung the colour the washed sample toward Violett.

PatentansprLiche 1st procedures for LS or Unterdrecken of the fluorescence of with optical Aufhellern treated or to treating substrates, by the fact characterized that one applies an UV absorber on these substrates before or after optical brightening up and fixiert.

2. Procedure gem&ss patent claim 1, by the fact characterized that the UV absorber fixes on a substrate treated with an optical Aufheller applied and wird.

3. Procedure gem&ss patent claim 1, by the fact characterized that the UV absorber is applied and fixed on the substrate, before the substrate treats with an optical Aufheiler wird.

4. Procedure in accordance with ss patent claim 2 or 3, by the fact characterized that the treatment with the UV absorber forwards, w&hrend or after the F&rben or printing the substrate on erfolgt.

Procedure gem&ss patent claim 1 or 2, by the fact characterized that the substrate treated with the optical Aufheller prints on sample in accordance with ss with dern UV absorber wird.

6. In the middle to LS or Unterdr cken fluorescence one with an optical Aufheller of treated or substrate which can be treated, containing a UV-Absorber.

7. Patent claim 1. treats substrates according to the procedure gem&ss.