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 commonly reserved for use in washing machines; liquid preparations which are generally concentrated detergents in solution in water are used less frequently for washing machines and are more generally reserved for so-called "hand washing", for washing dishes, whether machine or hand, etc.
• a particular drawback associated with the use of powders is the difficulty in preventing segregation of the constituents of different specific weight when the powder is subjected in particular to vibrations during transport, storage, etc. To overcome this drawback, a lot of research has been done to give the different ingredients of the powder the same apparent specific weight.
• 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 aims to obtain a detergent preparation which contains a suitable agent which facilitates compaction to form a tablet, this agent in combination with the detergent constituents of the composition also exerting a synergistic effect with said detergents to increase the washing properties. and of detergency and ultimately facilitating the disintegration of the tablet.
• 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 equally to such a preparation in the form of powders as in the form of tablets.
• the conventional detergent constituents can be used for this purpose, such as those mentioned in the state of the art, mentioned above which is included in the present specification for reference but preference is given to sodium lauryl and sodium sulfate at the right rate. at least 35% and preferably about 45% by weight of the total composition with other surfactants and any adjuvants.
• the preparation is obtained starting from a conventional detergent composition in compressed powder in the presence of the above-mentioned CMC by carrying out a compression such that, starting from conventional powders, tablets are formed.
• the compression is performed such that at the start of the powder preparation is compressed in a pastil - Leuse vector volume "powder to reduce at least by 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 of the tablet.
• the products generally incorporated in detergent preparations can also be present in the composition of the invention.
• the various constituents added to detergent preparations vary depending on the use for which the preparation is intended.
• the usual additives can be incorporated into the preparation such as whitening products, "builders", agents acting as foam limiters or stabilizers, optical bleaching agents, perfumes, various additives, in particular softeners or anti-scale agents, anti-redeposition agents, enzymes, etc.
• the preparations of the invention generally do not contain sodium polyphosphates although their use can in some cases be envisaged. Generally, their presence is undesirable due to the effect of eutrophication of water caused by its discharge into the water. runoff water.
• the conditions for obtaining the tablets are such that the pressures used are less than 1 kg / cm 2 , the pressures preferably being of the order of 0.6 kg / cm 2 .
• tablette or "pellet” applies to a product which has undergone a compacting action so as to agglomerate the constituent particles together under the action of the CMC.
• tablette does not necessarily have to be understood in the strict sense given to them in the pharmaceutical industry or in other fields, the main point being the presence of the binder and a certain cohesive effect. .
• the following table relates to a typical composition of a washing product for a washing machine which is suitable for preparation in tablet form. It should be noted that the preparation essentially relates to a preparation intended for washing white linen in washing machines, because it contains enzymes and sodium perborate. Those skilled in the art can however easily adapt the detergent preparation, in particular by purely and simply resorting to conventional commercial preparations according to the various desired uses.
• 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 pellet is 7.3 mm, it is easy to break but the dissolution time is still too long.
• the thickness of the tablet is 7.6 mm, which therefore represents a reduction of more than half of the initial filling volume of the powder in the tablet press.
• the tablets of the above-mentioned composition are not toxic. Their disgusting taste is a barrier, however, to accidental ingestion of these tablets, among others by children. However, in the case of such ingestion, it would only result in a temporary intestinal disturbance without causing serious disturbances.
• the tablets are characterized by the ease of their industrial preparation, the rigor of the dosage they allow and the convenience of their use.
• 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 g
• Two of these tablets are recommended for pre-washing and three tablets for washing, for a total weight of approximately 12.5 g per 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 and 10 if the dissolved 'oomprimés according to the above recommendations.
• the product is presented in a unit dosage form which is easy to use, compact and exerts a good washing effect despite the low concentration of the constituents in the detergent.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Molecular Biology (AREA)
• Emergency Medicine (AREA)
• Detergent Compositions (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19729895

Family Applications (2)

Family Applications After (1)

Country Status (8)

Cited By (8)

Citations (7)

• 1982
  • 1982-06-09 LU LU84192A patent/LU84192A1/fr unknown
• 1983
  • 1983-06-08 EP EP83870053A patent/EP0096680A1/fr not_active Withdrawn
  • 1983-06-08 JP JP58501880A patent/JPS59501016A/ja active Pending
  • 1983-06-08 WO PCT/BE1983/000011 patent/WO1983004417A1/fr not_active Application Discontinuation
  • 1983-06-08 EP EP83901801A patent/EP0110939A1/fr active Pending
• 1984
  • 1984-02-01 FI FI840411A patent/FI840411A0/fi not_active Application Discontinuation
  • 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

Patent Citations (7)

Also Published As

Similar Documents

Legal Events