Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0063—Photo- activating compounds

Definitions

• the present invention relates to a detergent composition for photoactivation bleaching and its method of use.
• bleaching is understood to mean the elimination of colored stains or stains resistant to the action of the alkaline aqueous medium and of the detergents present in usual detergents. In addition to this bleaching action, bleaching also includes a disinfectant or antiseptic action in the detergent bath.
• bleaching is obtained in particular by the addition of perborate to the washing medium.
• the washing must be carried out at a temperature of 80 to 90 ° C.
• sodium hypochlorite in a cold washing.
• such a product causes significant deterioration of the fibers.
• the object of the invention is therefore a photoactivation bleaching system, which is simple to use, which is effective with respect to soiling while respecting the treated fiber as well as possible, and which involves a sensitizer, adsorption on the fiber is completely reversible on rinsing.
• a product belonging to the family of xanthene dyes and more specifically of the fluorescein type is used. As indicated above, these products correspond to the water-soluble salts or disels of the acid of formula (I):
• the salts will generally be the sodium or potassium salts or disels.
• the hydrogen atoms carried by the carbons located 1 to 8 can be substituted by atoms of CI, Br and I.
• the products which are particularly suitable for the composition of the invention are those which, corresponding to formula I, have the property of being adsorbed on the fiber in a reversible manner.
• they have an absorption spectrum located substantially in the visible light range, that is to say between 400 and 800 nm, more precisely between 400 and 600 nm.
• M can be an alkali or alkaline earth metal.
• 1,2-dibromo fluorescein that is to say the dibromo salt or disel of formula I, 3,4-dibromo fluorescein, ie phloxine tetrabromo-1,2,3,4 tetrachloro-5,6,7,8 fluorescein, diiodo-1,2 fluoresceine, diiodo-3,4 fluoresceine and tetraiode-1,2,3,4 tetrachloro-5 , 6,7,8 fluorescein or "Rose Bengal".
• compositions comprising a combination of several sensitizing agents of the type described above.
• the bleaching system of the invention comprises an additive which, as indicated above, is chosen from the group of cyclic tertiary mono-, di- or tetramines.
• an additive which, as indicated above, is chosen from the group of cyclic tertiary mono-, di- or tetramines.
• amines of the above type are used but which are also bridged; by this is meant the amines in which a nitrogen atom is linked transversely to another nitrogen atom or to a ring carbon atom.
• Another interesting additive is hexamethylenetetramine.
• the bleaching systems comprising the products of the type defined above can be incorporated into a solid or liquid detergent composition.
• this detergent composition may include a surfactant. It is preferable that this surfactant is anionic or, if a mixture of surfactants is used that there is in this mixture at least one anionic surfactant. Mention may be made, for example, as anionic surfactants which can be used in the context of the invention, of the water-soluble salts of alkyl sulphate.
• composition may also comprise a base or "builder" of known type such as, for example, phosphates or polyphosphates of alkali metals soluble in water or else silicates.
• a base or "builder” of known type such as, for example, phosphates or polyphosphates of alkali metals soluble in water or else silicates.
• composition may include any known additive of the anti-foam, anti-redepositing type, perfumes for example.
• the proportions of the various constituents of the detergent composition will be selected such that once the composition dissolved in the washing bath, the sensitizer concentration and including eosin is between about 10 -6 M and 10 -5 M. Preferably this concentration should be located at about 2.5 to 10.10- 6 M. for higher values, the sensitizer in large quantities may have an internal filter effect affecting photoactivation upon irradiation of the washing bath.
• the concentration of each sensitizer remains in the range fixed above.
• the additive concentration must be between 10- 3 M and 10- 1 M. Below 10- 3 M there is no effect. Beyond 10-1M, there is no significant gain in money laundering. Preferably this concentration is located around 10-2M.
• the constituents of the detergent composition will preferably be chosen so that the pH of the detergent bath is between 9 and 11.
• compositions of the invention can be used in an extremely simple manner.
• the textile to be treated is first immersed in a detergent bath comprising the composition according to the invention.
• the textile is kept there with stirring at room temperature and in the dark or in ambient light to allow the deposition of the sensitizer.
• the detergent bath and the textile contained therein are subjected to light irradiation in the visible range (400 - 800 nm), for example from a halogen quartz lamp.
• This irradiation can last between 10 and 60 minutes, generally between 10 and 30 minutes. Generally during this irradiation, the temperature of the detergent bath is kept close to ambient.
• the bath is separated from the textile and the latter is then rinsed with water for a few minutes to remove the sensitizer.
• the dyed strips are finally dried with hot air, ironed between two sheets of filter paper and cut into test pieces.
• the test pieces with a homogeneous dye are selected and stored in the dark. Reflectance measurements of the samples are carried out on a GARDNER XL-805 reflectometer (din standard 6033) in the trichromatic system La L b L.
• a sample of stained cotton fabric prepared in the above manner and of known reflectance is then introduced into the washing bath and kept under stirring, at room temperature and in the dark, to allow the deposition of eosin.
• the detergent solution containing the fabric is then irradiated.
• the light irradiation is ensured by a HEDLER projector type "DE LUXE 2000" equipped with a quartz - halogen lamp 1000 w (CSRAM - HALOGEN SUPERPHOT).
• the distance between the surface of the detergent bath and the lamp is approximately 30 cm.
• the irradiation lasts 60 min.
• the temperature of the detergent bath is maintained at around 25 ° C.
• the samples are rinsed for 1 hour in 600 ml of deionized water protected from light and then dried between two sheets of filter paper.
• Example 2 The procedure is the same as in Example 1 with a cotton fabric stained with wine (standard soiling EMPA 114).
• the irradiation lasts 30 minutes.
• Example 3 The procedure is the same as in Example 3 with a cotton fabric stained with wine (standard soiling EMPA 114).
• the irradiation lasts 10 minutes.
• the samples are prepared, washed and analyzed as described in Example 1. However, the irradiation is 20 minutes.
• a whitening effect greater or close to that obtained with a system with a single sensitizer (as in the case of Examples 2 or 3) is obtained for the same soiling with a shorter irradiation time.
• Example 2 The procedure is the same as in Example 1 on the same soiling (NESTEA).
• the sensitizer concentration of 10- 5 M.
• the irradiation is 30 minutes.
• the system of the invention provides a bleaching of the same order of magnitude, or even greater than that obtained with a perborate system, with a washing time less in certain cases for the wine in particular, and in all case at a much lower temperature.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Detergent Compositions (AREA)

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Applications Claiming Priority (6)

Publications (2)

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• 1985
  • 1985-05-07 EP EP85400885A patent/EP0165115B1/fr not_active Expired
  • 1985-05-07 DE DE8585400885T patent/DE3560774D1/de not_active Expired
  • 1985-05-10 JP JP60098198A patent/JPS6116999A/ja active Pending
  • 1985-05-13 NO NO851893A patent/NO165204C/no unknown
  • 1985-05-14 GR GR851172A patent/GR851172B/el unknown
  • 1985-05-14 ES ES543156A patent/ES8608035A1/es not_active Expired
  • 1985-05-14 FI FI851920A patent/FI78502C/fi not_active IP Right Cessation
  • 1985-05-14 PT PT80464A patent/PT80464B/pt not_active IP Right Cessation
  • 1985-05-14 DK DK212085A patent/DK158918C/da not_active IP Right Cessation
  • 1985-05-15 US US06/734,135 patent/US4668418A/en not_active Expired - Fee Related

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