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
  • C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
• • 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

Definitions

• the present invention relates to a detergent preparation which can be used for various purposes, in particular for use in washing machines.
• the invention will be described essentially below with reference to the use in a washing machine, but it should be understood that the invention also applies to detergent preparations used in dishwashers and also for washing says “by hand”.
• Detergent preparations are generally presented in two main forms, namely "washing powders” or "liquid detergents”.
• washing powders are most generally reserved for use in washing machines, liquid preparations which are generally detergents concentrated in solution in water are used less frequently for washing machines and are more generally reserved for washing said "by hand", for washing dishes, whether in the machine or by hand, etc. These two presentations of detergents are linked to a series of drawbacks.
• a particular drawback linked to the use of powders is the difficulty in preventing segregation of constituents of different specific weight when the powder is subjected in particular to vibrations during transport, storage, etc.
• numerous researches have been carried out in order to confer on the various ingredients of the powder the same apparent specific weight.
• attempts have been made to modify the specific weight of the peroxide compounds, in particular the sodium perborate, in order to avoid segregation of the latter in the packaging of the washing powders.
• certain people are allergic to powders, which causes difficulties both for the workers in charge of packaging in the factory and for the housewife using the products.
• Many other drawbacks could be cited both for powders and for liquid preparations, such as the high specific volume, the difficulties in handling and packaging, the low biodegradability, etc.
• US Pat. No. 4,234,442 describes a packaging of a detergent composition in sachets which decompose in water. This packaging requires bagging that is not very compatible with industrial production rates and does not allow automation.
• US-A-4,099,912 describes, among other things, a washing process comprising the use of a tablet, but the composition formulations mentioned do not make it possible to obtain a composition which is sufficiently coherent in the compressed state and which decomposes easily on contact with the water.
• the present invention therefore seeks to obtain a • detergent preparation which contains an adequate agent which facilitates compaction to form a tablet, this agent in conjunction with the detergent constituents of the composition also exerting a synergistic effect with said detergents to increase the washing and
• sodium carboxymethylcellulose having a viscosity of the order of 15,000 to 25,000 m Pas, and preferably of the order of 20,000 m Pas measured at 20 ° C. and in the form of a 2% by weight aqueous solution meets this criterion when it is contained in the detergent composition in an amount of 5 to 25%, preferably in an amount of about 15% by weight.
• the present invention relates both to such a preparation in the form of powders and in the form of tablets.
• the preparation is obtained starting from a conventional detergent composition in compressed powder compressed in the presence of the abovementioned CMC by carrying out a compression such that, starting from conventional powders, tablets are formed.
• the compression is carried out in such a way that, at the start of the powder preparation, the volume of the powder is compressed in a conventional tablet press to reduce it by at least half.
• the nature of the CMC in particular the viscosity indicated, is of great importance for achieving the objectives of the invention.
• the main characteristic of this binder is that it must be soluble in water and also swell in water to facilitate the disintegration and dissolution operation of the tablet.
• the products generally incorporated in detergent preparations can also be present in the composition of the invention. It is known that the various constituents added to detergent preparations vary depending on the use for which the preparation is intended.
• additives such as bleaching products, "builders”, agents acting as foam limiters or stabilizers, agents optical whitening, perfumes, various additives, in particular softeners or anti-lime agents, anti-redeposition agents, enzymes, etc.
• the preparations of the invention generally do not contain sodium polyphosphates although their use may in some cases be envisaged.
• the conditions for obtaining co pri- my 5 are such that the pressures used feels inférieu ⁇ res 1 kg / cm 2, the pressure preferably being on the order of 0.6 kg / cm.
• tablette applies to a product which has undergone a compacting action so as to agglomerate the constituent particles together under the CMC action.
• tablette and “lozenge” should not, however, be necessarily understood in the strict sense given to them in the pharmaceutical industry or in other fields, the main point. pal being the presence of the binder and a certain cohesive effect.
• the following table relates to a typical composition of a washing product intended for a washing machine which is suitable for preparation in tablet form. It should be noted that the preparation is essentially a preparation for washing white linen in washing machines, since it contains enzymes and sodium perborate. Those skilled in the art will however easily be able to adapt the detergent preparation, in particular by purely and simply resorting to conventional commercial preparations according to the various desired uses. Examples
• the powder mixture thus prepared is introduced into a tablet press under a filling height of 16 mm and various tests have been carried out by applying variable manufacturing pressures which result in variable heights of compressed tablets.
• the weight of the tablet corresponding to the filling height of 16 mm, for said constituents is 3.5 g, the diameter of the cylindrical tablet being 21.9 mm.
• the thickness of the pellet is 6.9 mm, it is less hard to break but the dissolution is still unsatisfactory.
• the thickness of the pad is' 7.6 mm, which represents a reduction of more than half of the initial volume of the powder filling in the pelletizer.
• the tablets are characterized by the ease of their industrial preparation, the rigor of the dosage which they allow and the convenience of their use. It should be noted that, with a view to accelerating the disintegration of the tablets in contact with water, the use of effervescent materials consisting inter alia of a mixture of an organic acid in soluble form such as citric acid and sodium carbonate and bicarbonate is possible but is generally superfluous.
• the tablets are produced so as to preferably obtain unit dosage forms of 2.4 to 2.5 * 5 g
• OMFI S Two of these tablets are recommended for pre-washing and three tablets for washing, i.e. a total weight of approximately 12.5 g for ' 5 kg of laundry to be machine washed with the amount of water prescribed by the manufacturer. of the machine.
• the pH of the preparation is of the order of 8 to 10 when the tablets are dissolved according to the above recommendations.
• the technician in the branch will be able in particular to adapt the detergent compositions according to the desired uses and in particular by laboratory tests and washing tests, to adapt the various constituents of the mixture to the various desired results among which the following properties must be particularly taken into consideration for the new tablets obtained according to the invention, namely: solubility and speed of disintegration and dissolution of the tablets in water, consistency of the tablets, satisfactory turbidity of the bath, pH stability and finally cost price which constitute the main advantages of the invention.

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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)
• Health & Medical Sciences (AREA)
• Molecular Biology (AREA)
• Emergency Medicine (AREA)
• Detergent Compositions (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 1982
  • 1982-06-09 LU LU84192A patent/LU84192A1/fr unknown
• 1983
  • 1983-06-08 WO PCT/BE1983/000011 patent/WO1983004417A1/fr not_active Ceased
  • 1983-06-08 EP EP83901801A patent/EP0110939A1/fr active Pending
  • 1983-06-08 JP JP58501880A patent/JPS59501016A/ja active Pending
  • 1983-06-08 EP EP83870053A patent/EP0096680A1/fr not_active Withdrawn
  • 1983-06-08 FI FI840411A patent/FI840411L/fi not_active Application Discontinuation
• 1984
  • 1984-02-06 NO NO840445A patent/NO840445L/no unknown
  • 1984-02-07 DK DK54584A patent/DK54584A/da not_active Application Discontinuation
  • 1984-02-07 OA OA58226A patent/OA07653A/xx unknown

Non-Patent Citations (1)

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