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
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0065—Solid detergents containing builders
  • C11D17/0073—Tablets
  • C11D17/0086—Laundry tablets
• • 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
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0065—Solid detergents containing builders
  • C11D17/0073—Tablets
  • C11D17/0078—Multilayered tablets
• • 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
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
• • 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
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3942—Inorganic per-compounds
• • 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
  • C11D3/39—Organic or inorganic per-compounds
  • C11D3/3945—Organic per-compounds

Definitions

• the invention relates to a new detergent tablet for washing linen. It also relates to the method of manufacturing said tablet.
• Products for washing clothes can come in a variety of forms, solid or liquid. Liquid forms are less and less less used, solid forms being preferred for their bulk minimum and their maximum efficiency.
• this type of product has the disadvantage of intimately mixing all of the constituents and in particular the peroxidant system and the enzymatic system, which jeopardizes the stability of the product and inevitably leads to a loss of activity.
• these monolayer tablets contain an anionic surfactant of the sodium alkylbenzene sulfonate type, which can cause, during the manufacture of the pastille of the phenomena of sticking of the powder on the punches of the machine.
• the problem which the invention proposes to solve is provide a shelf for washing clothes that is stable over time.
• Another object of the invention is to propose a tablet, the manufacture of which is simple to implement.
• disintegration we mean the separation operation others of the different components constituting the outer and central layers. We distinguish this disintegration stage, which corresponds to a “coarse” separation particles together, from the subsequent step of dissolving the constituents proper.
• This sandwich structure therefore makes it possible to solve the problem of product stability during storage by separating the peroxidizing activity from the layer central, that is to say the bleaching activity, the enzymatic activity of outer layers, while allowing rapid action of the central layer after disintegration thereof during the washing operation.
• the disintegration in a very short time of the central layer allows avoid that all or part of the shelf is fixed on the laundry thus leading to indelible staining due to the presence of the peroxidizing system.
• the tablet is in the form of at least three flat layers superimposed on each other by compaction of their widest surface. In this way, the disintegration of the apparent periphery of the intermediate layer during disintegration outer layers is very limited.
• the disintegrating agent is chosen, although the list is not exhaustive, in the group comprising clays, cellulose and its derivatives, polyvinyl pyrrolidone, modified or crosslinkable starch.
• the disintegrating agent is chosen from the group comprising clays, cellulose and its derivatives, polyvinyl pyrrolidone, modified or crosslinkable starch.
• said central layer undergoes during manufacture, a low force of precompression.
• the disintegrating agent represents between 5 and 20% by weight, advantageously 15% by weight of the central layer.
• the disintegration of said central layer is not sufficient fast and leads to the formation of tablet aggregates.
• the disintegration time of the central layer as such is between 20 seconds and 75 seconds, while the disintegration time of outer layers is between 30 seconds and 90 seconds.
• the disintegration time of the outer layers is one minute, while that of the central layer is 30 seconds after complete dissolution of the outer layers.
• the two outer layers have a composition identical chemical.
• system enzymatic means a set of enzymes of the protease, amylase type, lipase and cellulase.
• the outer layers include an anionic and / or nonionic surfactant firstly to wet the fiber and then to take off the dirt by decreasing the surface tension.
• the nonionic surfactant is distributed between the outer layers and the central layer.
• the anionic surfactant is chosen from the group comprising sodium alkylbenzene sulfonate, alkylsulfate and alkyl ether sulfate.
• nonionic surfactant is chosen from the group including ethoxylated fatty alcohols, ethoxylated alkylphenols.
• outer layers include an anti-scale agent.
• the anti-scale agent is chosen from the group comprising the phosphonate, silicoaluminate, tripolyphosphate (TPP), homo or copolymers of acrylic acid and citrates.
• the outer layers include a bleach activator.
• the bleach activator can be incorporated into the layer. central.
• the whitening activator is chosen from the group including tetraacetylene diamine (TAED), pentaacetyl glucose (PAG), and tetraacetyl glycoluryl (TAGU).
• TAED tetraacetylene diamine
• PAG pentaacetyl glucose
• TAGU tetraacetyl glycoluryl
• Said bleach activator thus activates the system peroxidant contained in the central layer, in practice, the perborate or the percarbonate, the reaction leading to the formation of hydrogen peroxide and acid peracetic.
• the peroxidizing system exercises its bleaching action only after dissolution of the two outer layers.
• the central layer contains also a perfume.
• the central layer includes a disinfecting agent in the form of coated granules capable of being released depending on the wash water temperature.
• the coating of the disinfecting agent is carried out in a known manner by a person skilled in the art, in particular by spraying fat onto the disinfectant particles, such as triglycerides or waxes.
• the washing tablet may diffuse the disinfectant at a given temperature of the wash water, depending on the coating chosen.
• the invention also relates to the method of manufacturing said multilayer tablet.
• the weight of the outer layers is between 10 and 20 grams, preferably between 12 and 17 grams.
• the weight of the central layer is between 10 and 20 grams, advantageously between 10 and 15 grams.
• the first outer layer and the central layer are packed to a pre-compression value of between 10 kg / cm 2 and 100 kg / cm 2 , while the tablet obtained is pressed to a value between 20 kg / cm 2 and 400 kg / cm 2 .
• tablets of 40 g, diameter 45 are manufactured, the hardness is between 4 and 15 kP, advantageously 5 to 7 kP.
• a mixture 1 is then prepared intended to be mixed with the base atomized to form the outer layers.
• the atomized base is mixed with the mixture 1.
• the mixture obtained is separated into two equal parts intended to form the outer layers.
• the first half is placed on a support, then it is packed by subjecting it to a precompression force of 15 kg / cm 2 .
• This mixture 2 is deposited on the first outer layer and then packed by subjecting it to a precompression force of 15 kg / m 2 .
• the mixture intended to form the second outer layer is deposited on the central layer, then the tablet obtained is subjected to a pressure of 60 kg / m 2 .
• the two outer layers represent 26 g, while the central layer represents 14 g.
• Example 2 Phosphate-free tablet
• the tablets are produced according to the same process as in Example 1.
• the two outer layers represent 26 g and the central layer represents 14 g.
• the tablet of the invention has strong stability in separating peroxidizing system and enzymatic system.

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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)
• Inorganic Chemistry (AREA)
• Detergent Compositions (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9529394

Family Applications (1)

Country Status (2)

Cited By (12)

Citations (5)

• 1998
  • 1998-07-31 FR FR9810024A patent/FR2781810B1/fr not_active Expired - Fee Related
• 1999
  • 1999-07-21 EP EP99420169A patent/EP0976820A1/de not_active Withdrawn

Patent Citations (5)

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