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
  • C11D3/16—Organic compounds
  • C11D3/20—Organic compounds containing oxygen
  • C11D3/22—Carbohydrates or derivatives thereof
  • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
  • C11D3/227—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin with nitrogen-containing groups
• • 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
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
  • C11D17/049—Cleaning or scouring pads; Wipes
• • 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
  • C11D3/0021—Dye-stain or dye-transfer inhibiting compositions
• • 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
  • C11D3/37—Polymers
  • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3719—Polyamides or polyimides
• • 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
  • C11D3/37—Polymers
  • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3723—Polyamines or polyalkyleneimines
• • 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
  • C11D3/37—Polymers
  • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
• • 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
  • C11D3/37—Polymers
  • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • C11D3/3769—(Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines
• • 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
  • C11D3/37—Polymers
  • C11D3/3792—Amine oxide containing polymers

Definitions

• This invention relates to a material for removing excess colour in washing water and a method for its production.
• This invention faces the problem from another viewpoint, in other words, it provides a material that is able to totally eliminate any colour present in washing water, thus preventing the dying of the "white” garments. Consequently, the "coloureds” and “whites” can be washed in the machine at the same time in the presence of the material of the present invention which acts as a "dye scavenger".
• the present invention relates to a material comprising a substrate and a suitable additive that removes the colour.
• the substrate can comprise any type of material that is compatible with normal laundry, and can have any form and size, such as, for example a handkerchief or a piece of cloth.
• the substrate has the form of a handkerchief.
• the substrate is a natural and/or synthetic fabric, a natural and/or synthetic non-woven fabric and/or paper.
• the substrate is a natural and/or synthetic non-woven fabric, and more preferably a synthetic non-woven fabric.
• Non-woven fabrics that can be conveniently used are: spunlaced, spunbonded, thermobonded, and airlaided materials.
• the terms spunlaced, spunbonded, thermobonded, and airlaided refer to both the non-woven fabrics as well as the techniques for obtaining them, well known in the art.
• the fibres preferably used to obtain these non-woven fabrics are made of: polyester (PE), polypropylene (PP), PLA (polylactics), polyethylensulfone (PES), acrylic polymers, regenerated cellulose, for example, lyocell® (that is regenerated cellulose fibre, obtained using a process of dissolving and spinning in organic solvent) or tencell® (produced in three layers with the fibres on the two external sides and fluff pulp in the middle; or produced in two layers of fibre/fluff pulp), cotton, viscose or their blends.
• the substrate is 100% regenerated cellulose, for example: lyocell® or tencell®. More preferably, the substrate is 100% regenerated cellulose obtained using the spunlaced technique.
• the substrate performs the function of "carrier" of the additive, which removes the colour.
• the additive can be any type of substance that has a very high affinity for colourants.
• the principle at the base of this invention is the fact that the colourant released in the washing water by the coloured garments has a greater affinity for the material of the present invention than for the fabric of the "whites".
• the additive will be selected from: cationic heterocyclic polymers, proteins, chitin, chitosan, polyvinylamine (PVA), polyethylenimine (PEI), acrylic polymers, vinylic polymers, polyamine-N-oxide and their blends. More preferably, the additive is selected from: cationic heterocyclic polymers, acrylic polymers, vinylic polymers and their blends. Even more preferably, the additive is a cationic heterocyclic polymer, for example the COBRAL MM marketed by the company, Lamberti S.p.A..
• the material object of the present invention can be obtained by combining in any manner, one of the substrates listed above with one or more of the additives.
• the preferred material comprises the non-woven, 100% regenerated cellulose, spunlaced fabric and a cationic heterocyclic polymer.
• 100% regenerated cellulose is the material lyocell® and an example of the cationic heterocyclic polymer is COBRAL MM.
• the substrate preferably has a weight that ranges between 150 grams/m 2 and 50 grams/m 2 , more preferably between 100 grams/m 2 and 60 grams/m 2 .
• the fibres of the substrate preferably have a size that ranges between 0,5 dtex and 5 dtex, preferably between 1 dtex and 2 dtex.
• the additive is fixed on and/or incorporated into the substrate by means of: impregnation, spraying, printing and/or plating and the relation existing between the additive and the substrate can be: absorption, adsorption, hydrogen bonding, electrostatic force for example ion/ion interaction or ion/dipole interaction, incorporation, chemical or physical bonds, etc.
• the present invention relates to a process for the production of the dye scavenger.
• Said process comprises the following steps:
• the substrate is preferably processed by means of impregnation, spraying, printing and/or plating, all of which are techniques known to the art.
• the additive is applied by spraying and/or impregnation, and more preferably by impregnation.
• the substrate is passed through a solution of the additive having a suitable concentration in order to leave on the finished material an amount of additive ranging between 0,5% and 50% in weight on the finished material, preferably between 5% and 25%, more preferably between 10% and 22%.
• the additive solution is preferably an aqueous solution made alkaline by the addition of a base, preferably NaOH.
• the concentration of the base ranges between 5 and 100 grams/litre, preferably between 8 and 50 grams/litre, more preferably between 10 and 30 grams/litre.
• the additive concentration generally ranges between 5 grams/litre and 300 grams/litre, preferably between 25 grams/litre and 200 grams/litre, more preferably between 100 grams/litre and 180 grams/litre.
• step c) the substrate is passed through two or more rollers and pressed in order to eliminate any excess additive and to leave on the substrate the required amount (foulard technique).
• the pressing pressure will depend on the amount of additive to be left in the finished material and on the concentration of the solution or the additive as applied during stage a).
• the steps a) and b) and c) can be performed at any suitable temperature that does not alter the properties of the substrate and the additive, preferably at room temperature.
• the substrate is dried, preferably in an oven, at a temperature ranging between 100°C and 220°C, preferably between 130°C and 180°C, for a period of time that depends on the amount of additive and solvent present, on the temperature and the efficiency of the drying system.
• pressing can be applied at a pressure ranging between 0,5 and 5 bar, preferably approximately 2 bar and drying can be performed at a temperature ranging between 130°C and 180°C, for a period of time between 1 and 5 minutes, preferably approximately 3 minutes.
• the aforesaid parameters can be easily modified by those skilled in the art according to the final material that is required (that is with a greater or lesser amount of impregnated additive) and the machines that are available. For example, if a very efficient oven is available, the drying time can be reduced considerably, thus speeding up the whole process; if the foulard technique is used wherein pressing is performed using three cylinders, the applied pressure could be less than that used when pressing with two cylinders, etc.
• the process should be preferably performed continuously, that is, the substrate is subjected to impregnation, pressing and drying without any intermediate stages or pauses (possibly to permit the additive to bond better with the substrate) between one process and another. All this is possible because the additive possesses a very high affinity for the substrate and, therefore the required amount of additive bonds with the substrate almost instantly and it is not necessary that the substrate be left to impregnate for a long period of time.
• the dye scavenger material of the present invention is normally introduced into conventional domestic or professional washing machines before the beginning of the washing cycle together with the "white” and “coloured” laundry.
• whites refers to a laundry wash comprising white and light coloured fabrics (for example: beige, pale pink, pale blue, grey etc.); preferably light coloured fabrics.
• coloureds refers to a laundry wash comprising strongly coloured fabrics (for example: red, bordeaux, yellow etc.) or very dark colours (for example: navy blue, black, dark green, denim etc.). These fabrics can be new or can have already been subjected to washing in a washing machine.
• coloureds the term refers to a laundry wash comprising strongly coloured fabrics (for example: red, bordeaux, yellow, orange, etc.); and more preferably this refers to strongly coloured fabrics that have been previously washed 5 or 6 times.
• the material of the invention is introduced into the washing machine together with light coloured and strongly coloured fabrics coloured fabrics that have already been previously washed 5 or 6 times.
• the number of material sheets of the invention that are used for each wash will depend on the weight of laundry and the colours present.
• 2 or more sheets of the material of the invention are introduced into the washing machine in the case of fabrics that loose a large amount of colour, for example cotton fabrics with strong intense colours.
• the material of the invention is resistant to normal washing temperatures and common detergents and additives, including bleach, and can be used repeatedly several times before loosing its efficacy.
• a solution is prepared mixing 1 litre of water with 150 grams of COBRALL MM and 20 grams of NaOH 36°be.
• a piece of 100% lyocell® non-woven fabric with a weight of 70 grams/m 2 is passed in a continuous manner, through a bath containing the aforesaid solution so that it is well impregnated, then passed through two rollers that press the material at a pressure of 2 bar, and finally through a cylinder oven, where it is dried at 150°C for 3 minutes.
• the amount of additive present on the substrate is 30% in weight based on the weight of the finished material, if the pk del foulard (that is the % of the liquid that remains in the non-woven fabric after pressing) is equal to 200%.
• the material obtained in example I is placed in a domestic washing machine together with light coloured garments: beige and pink, and strongly coloured garments already washed 6 times: red and yellow.
• the garments are washed at 60°C for approximately 2 hours. During the washing cycle the water remains clear all the time, and on completion, it can be seen that there is no partial or total colouring of the light coloured garments; the colour lost by the strongly coloured garments has been retained by the dye scavenger and the material has been subjected to no alteration.
• the material of the invention is far more resistant, especially when it is wet, than the cotton that is normally used as a substrate for this type of product.
• the combined action of the substrate and the additive which both possess a high affinity for the pigments, provide a very efficient capacity for retaining the colour present in the washing water, for higher than other products known in the art.
• the process of the invention is very rapid in that it can be performed in a continuous manner and has a limited number of stages. This provides a considerable saving in time and energy.
• the final material is obtained within a few minutes since the additive is bonded with the substrate almost immediately, and it does not need to be left to rest for hours (to ensure that the additive is absorbed in the substrate) as occurs with the processes known in the art. All this is possible thanks to the use of the additives of the present invention that possess a very high affinity for the substrate and are absorbed in efficacious amounts almost immediately.
• a substrate in 100% regenerated cellulose for example lyocell®
• a cationic heterocyclic polymer for example COBRAL MM
• the present invention provides a material and a production process higher in quality and efficiency than those described in known state of the art.

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• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Health & Medical Sciences (AREA)
• Emergency Medicine (AREA)
• Molecular Biology (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Detergent Compositions (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)

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Citations (5)

• 2005
  • 2005-07-22 ES ES05425530T patent/ES2315827T3/es active Active
  • 2005-07-22 EP EP08165548A patent/EP2014754A3/de not_active Withdrawn
  • 2005-07-22 AT AT05425530T patent/ATE409738T1/de not_active IP Right Cessation
  • 2005-07-22 DE DE602005010009T patent/DE602005010009D1/de active Active
  • 2005-07-22 EP EP05425530A patent/EP1621604B1/de not_active Not-in-force

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