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
  • C11D3/40—Dyes ; Pigments
  • C11D3/42—Brightening agents ; Blueing agents
• • 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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • 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
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/2068—Ethers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/60—Optical bleaching or brightening
  • D06L4/607—Optical bleaching or brightening in organic solvents

Definitions

• the present invention relates to fluid formulations, containing from 10 to 50% of optical bleachers and their use for the preparation of detergents.
• optical bleachers are preferably marketed and employed in the form of solutions or aqueous suspensions.
• these have the advantage for the consumer of being easy to handle and dose also when used with automatic devices; moreover, they do not give rise to the formation of irritating dust in the work environment.
• the water-based formulations are not desirable.
• the amount of perborate in the detergent composition must be increased, and a perborate activator must even be added, if the desired activity at room temperature is to be attained.
• optical bleachers when perborate is present, undergo a rather marked degradation depending on the amount of perborate, the amount of water still present in the formulation when the optical bleacher is added and the operating temperature.
• the present state-of-the-art provides for the addition of the optical bleacher as the last component in the final phase of the process, that is when the formulation is almost ready and it contains no water at all or a minimum amount.
• optical bleacher is added last to the pre-formed water-free granules.
• the optical bleacher must be of such a form that enables it to be deposited, mixed and distributed evenly on the surface of the granules and pearls to which it adheres firmly.
• optical bleachers which fully meet these new technological requirements have been found. They are solutions or dispersions, containing from 5 to 60% of optical bleachers, preferably anionic, anhydrous or containing at most 10% water, and comprising as a solvent or dispersing phase a compound of formula I: in which R is hydrogen, C1-C18 straight or branched alkyl, aryl or aryl substituted with one or two C1-C9 alkyl groups, R1, R2 and R3 can be the same or different and are hydrogen or methyl, m, n and p can have values ranging from 0 to 80, with the proviso that the sum of m+n+p is at least 1 and at most 100.
• C1-C18 alkyl examples are methyl, ethyl, propyl, isopropyl, hexyl, octyl, 4-methylheptyl, nonyl, dodecyl, tetradecyl, hexadecyl, octadecyl.
• aryl and substituted aryl groups are phenyl, methylphenyl, dimethylphenyl, 4-tert-butylphenyl, 4-tert-octylphenyl, 2,4-di-tert-butylphenyl, 4-nonylphenyl.
• Preferred polyethers of formula I are those wherein R is hydrogen or a C1-C18 alkyl group and the sum of m+n+p ranges from 1 to 60.
• formulations are fluid, anhydrous or contain at most of 10% water; they are ready to use, stable during storage and easily handled.
• oxyethylene-oxypropylene condensation compounds of formula I constituting the dispersing or solvent phase of the formulations according to the present invention have been known for some time and already widely used in numerous industrial fields (see for example: Nickolas Schoenfeldt: Grenzdonzine ⁇ thylenoxide-Addukte-Wissenschaftliche Verlagsippo GmbH Stuttgart 1976; CTFA Cosmetic Ingredient Handbook First Edition-Editor Joanne M. Mikitakis pages 71-91).
• the process for the preparation of the dispersions according to the present invention has the advantage of simplicity.
• the optical bleacher is added to the compounds of formula I under stirring and stirring is continued until a solution or an homogeneous dispersion is obtained.
• the attainment of a solution or of a dispersion depends mainly on the chemical nature of the optical bleacher and/or from the structure of the compounds of formula I.
• the viscosity of the solutions or dispersions depends on the nature of the condensate of formula I.
• the concentration may vary within wide ranges, normally between 5 and 60%, preferably between 10 and 40%, so as to avoid very low concentration formulations, which are not economical or very viscous formulations which are difficult to use.
• a further object of the present invention is the use of the above mentioned fluid formulations in the preparation of detergents, especially those which are “compact” or "Mega-Pearls”.
• the formulations according to the present invention contain, preferably, anionic optical bleachers, containing in their chemical structure at least one sulfonic group.
• Preferred compounds of formula II are those in which R4 is phenylamino, R5 is morpholino or ethylamino and M is an alkali metal.
• distiryl bleachers of formula III in which R6 is hydrogen or chlorine and M is an alkali metal are possible.
• M is an alkali metal or triazole compounds of formula V in which R8 and M have the meanings defined above.
• the formulations according to the present invention preferably contain from 10 to 40% of a compound of formula II-V or of mixtures thereof.
• optical bleachers of formula II-V contain large amounts of inorganic salts (for example, sodium chloride or sodium sulfate), before the preparation of the suspensions, they must preferably be removed or reduced to a minimum with respect to content.
• inorganic salts for example, sodium chloride or sodium sulfate
• any salt that may be present in the optical bleacher may be removed from the solution obtained by means of simple filtration.
• the formulations according to the present invention can also be prepared from moist cakes of the optical bleachers derived from isolation by means of the filtration of these products.
• the moist cake is suspended or dissolved and water is successively eliminated through distillation, optionally under vacuum, completely or to a predetermined minimum residue.
• a clear amber solution is obtained, containing 25% of optical bleacher.
• 33.3 g of a solution of the optical bleacher of Example 1 are added to 9000 g of a slurry of a detergent formulation consisting of water, sodium bicarbonate, sodium dodecylbenzenesulfonate, sodium silicate and sodium sulfate. After stirring for 30 minutes, the mixture is spray-dried.
• a detergent formulation consisting of water, sodium bicarbonate, sodium dodecylbenzenesulfonate, sodium silicate and sodium sulfate.

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

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• 1994
  • 1994-09-23 IT ITMI941935A patent/IT1270004B/it active IP Right Grant
• 1995
  • 1995-09-14 EP EP95114441A patent/EP0703293A3/de not_active Withdrawn

Non-Patent Citations (1)

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