EP0375022A2 - Détergent solide sous forme de bloc - Google Patents

Détergent solide sous forme de bloc Download PDF

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Publication number
EP0375022A2
EP0375022A2 EP19890203144 EP89203144A EP0375022A2 EP 0375022 A2 EP0375022 A2 EP 0375022A2 EP 19890203144 EP19890203144 EP 19890203144 EP 89203144 A EP89203144 A EP 89203144A EP 0375022 A2 EP0375022 A2 EP 0375022A2
Authority
EP
European Patent Office
Prior art keywords
block
solid detergent
weight
detergent composition
solid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890203144
Other languages
German (de)
English (en)
Other versions
EP0375022B1 (fr
EP0375022A3 (fr
Inventor
Guido Clemens Van Den Brom
Norman Jason Pritchard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10648994&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0375022(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP0375022A2 publication Critical patent/EP0375022A2/fr
Publication of EP0375022A3 publication Critical patent/EP0375022A3/fr
Application granted granted Critical
Publication of EP0375022B1 publication Critical patent/EP0375022B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • 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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/06—Phosphates, including polyphosphates
    • 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
    • C11D3/395—Bleaching agents
    • C11D3/3955—Organic bleaching agents

Definitions

  • the present invention relates to a solid detergent block for obtaining an aqueous chemical solution having a substantially constant concentration.
  • Such blocks of chemical are used in industrial cleaning processes such as mechanical warewashing or fabric washing, and generally comprise alkaline ingredients, detergents, builders, etc.
  • Industrial warewashing machines generally comprise a wash tank which contains the cleaning solution for the wash process.
  • the soiled wash load is doused with the cleaning solution and subsequently with rinse water which falls into the wash tank.
  • the cleaning power of the cleaning liquid is reduced, first because some is exhausted by the soil-removing process and, second, because it is diluted with rinse water.
  • the cleaning solution is therefore recharged from time to time by adding fresh cleaning liquid from a dispenser system, which usually provides a concentrated aqueous solution of the alkaline- and/or surfactant-­based chemical composition.
  • the powdered material can be dissolved in a dispenser of the "water-in-reservoir" type.
  • the powdered material is submerged under water, which therefore becomes loaded or even saturated with the powder. When more water is added, the excess solution flows into an overflow pipe leading to the washing machine.
  • briquettes such as, for instance, described in US patents 2,382,163, 2,382,164 and 2,382,165. Briquettes can be used with a "water-in-reservoir" type of dispenser.
  • a more recent type of solid detergent is the cast or block form, whereby a solid detergent block having a weight of several kilograms is formed by pouring a concentrated aqueous slurry into a container, in which it solidifies upon cooling as a result of the hydration of the salts in the composition, especially the sodium tripolyphosphate.
  • Such cast solid blocks are, for example, described in European patent 3,769.
  • Solid detergent blocks have won a certain degree of popularity in the area of industrial warewashing because they constitute a non-dusty and therefore relatively safe product form for the often aggressive chemicals used. Furthermore, hydrated solid blocks are economical in use because they can be manufactured and transported as very concentrated products.
  • a disadvantage of the above-mentioned solid detergent blocks is the difficulty of incorporating bleach in them, owing to the incompatibility of bleach systems with the caustic components of the block and the elevated temperatures used in the manufacturing process of the block. This is true for the hypochlorite-type of bleach, usually sodium hypochlorite, as well as for organic chlorine-type of bleach.
  • solid detergent blocks may be provided which constitute an even more concentrated product than the solid blocks obtained by hydration, and which enable the incorporation of stable bleach in the block. Equally surprising was the constant delivery of the chemicals of the block when the water is sprayed on to the block.
  • a solid detergent composition in the form of a block of a compressed granular material, said block having a weight of 0.2-10 kg, preferably 1-5 kg.
  • Another aspect of the present invention is a process for the manufacture of these blocks, whereby a powder is compressed in a mould under a pressure of 3 to 30 kilo Newton per square cm (KN/cm2) bar to form a solid block.
  • KN/cm2 kilo Newton per square cm
  • Yet another aspect of the present invention is the use of a solid detergent block according to the invention in an industrial warewashing or fabric washing process.
  • a solid detergent composition in the form of a block of compressed granular material having a weight of 0.2-10 kg, preferably of 1-5 kg.
  • the blocks are usable for various applications in the area of industrial cleaning, such as in mechanical warewashing and fabric washing, but other industrial detergent processes are also envisaged (e.g. bottle washing or conveyor belt lubricating).
  • the block contains 5-80% by weight, preferably 5-65% by weight of an alkaline agent, such as sodium- or potassium-hydroxide, -metasilicate or -carbonate.
  • Fabric washing compositions usually contain mostly metasilicate and/or carbonate, whereas compositions for mechanical warewashing are the most alkaline and comprise sodium hydroxide and/or potassium hydroxide.
  • the block contains 5-70% by weight, preferably 10-50% of a builder.
  • a builder This may be a zeolite or a phosphate builder or any other suitable hardness-­precipitating or hardness-sequestering agent.
  • the compressed block may contain up to 15% by weight of a bleach component, for example an active chlorine bleach such as sodium dichloro-isocyanurate. It is a specific advantage of the compressed blocks according to the invention that high levels of such bleaches may be incorporated and that the bleach remains stable for several months. In comparable blocks obtained by hydration, the active chlorine content is known to decrease rapidly in time.
  • a bleach component for example an active chlorine bleach such as sodium dichloro-isocyanurate.
  • the blocks may furthermore comprise 0-10% by weight of a polymer.
  • Suitable polymers are, for instance, acrylic acid polymers, such as Acrysol LMW 45 ND (ex Rohm & Haas) or Goodrite K 7058 D (ex BF Goodrich).
  • an anti-­foam agent such as a low-foaming nonionic surfactant in the wash liquor and such agents may indeed be incorporated in the solid blocks according to the invention. Amounts of 0-5% by weight proved to be suitable.
  • the blocks according to the invention may further comprise suitable minor ingredients, such as bleach stabilizers, enzymes, etc.
  • suitable minor ingredients such as bleach stabilizers, enzymes, etc.
  • Additional components may be compaction aids, for instance calcium stearate, hydrophobic silica or talc powder, solubility aids, such as polyethylene glycol or carbowax.
  • the weight, shape and the dimensions of the compressed blocks may vary with the application envisaged. For mechanical warewashing purposes we found blocks of approximately 1.5 kg to be very suitable.
  • a process for manufacturing a solid detergent block as described above According to this process, a suitable granular detergent powder corresponding to the desired chemical composition is compressed in a mould under a pressure of 3-30 KN/cm2.
  • This process can be carried out in a suitable press, preferably a hydraulic press, for instance a LAEIS Hydraulische Doppeld Wegpresse, TYP HPF 630 as manufactured by LAEIS, West-Germany. It proved to be especially advantageous to form the block by two or more consecutive pressings of increasing pressure.
  • a pre-compaction is achieved at a relatively low pressure, which is then followed by one or more steps at the maximal pressure. Following this procedure, a higher degree of compaction can be achieved than by using one single pressing.
  • the pressing can be carried out at ambient temperature, high levels of heat-labile components, such as STP or enzymes, may be incorporated in the blocks. This is regarded as an exceptional advantage of the present invention. After manufacture, the blocks should be packaged as soon as possible, owing to their hygroscopic nature.
  • Another aspect of the invention is the use of the solid blocks according to the invention in an industrial warewashing or fabric washing process.
  • the compressed block is placed inside a suitable dispenser, in which it is sprayed upon with water in order to obtain an aqueous solution of the solid detergent material.
  • the water may also form a slurry or suspension of the chemical.
  • aqueous chemical solution for the purpose of this invention, all these possibilities shall be referred to hereafter as aqueous chemical solution.
  • Suitable dispensers for solid blocks are known in the art. A good constant delivery was for example obtained when the compressed block according to the invention was placed in a dispenser as described in our co-pending British application 8830006.6.
  • Triton DF 12 2.0 2.0 2.0 2.0 2.0 2.0 Dequest 2041 0 2.0 2.0 0 0 Sodium-metasilicate.5 aq. 0 10.0 0 0 0 Sodium perborate monohydrate 0 0 10.0 0 0 TAED 0 0 3.0 0 0
  • the blocks obtained were then stored in a closed container for a period of three months at 20° or 30°C. Subsequently, they were analyzed for their sodium tripolyphosphate (STP) and active chlorine content. The results are shown in Table II. The STP content and the active chlorine content are expressed as a percentage of the values found for the starting material.
  • Example 1 In order to investigate the delivery of the chemicals from a solid detergent block according to the invention, a block was prepared according to Example 1. Subsequently, it was sawn into smaller blocks of 7.5 x 7.5 x 16 cm. One of these blocks was placed in a dispenser as described in our co-pending British application 8830006.6. Subsequently, it was sprayed upon in portions of 200 ml water, for 10 seconds, with intervals of 60 seconds. The water had a temperature of 20°C and was of 7° German Hardness. The conductivity of the effluent was measured as a function of the number of sprays. The results are shown in the accompanying Figure. As can be seen from the Figure, the concentration in the effluent was found to be essentially constant over a prolonged period of time of more than 4 hours.

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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)
EP89203144A 1988-12-22 1989-12-11 Détergent solide sous forme de bloc Revoked EP0375022B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8830010 1988-12-22
GB888830010A GB8830010D0 (en) 1988-12-22 1988-12-22 Detergent composition

Publications (3)

Publication Number Publication Date
EP0375022A2 true EP0375022A2 (fr) 1990-06-27
EP0375022A3 EP0375022A3 (fr) 1991-08-14
EP0375022B1 EP0375022B1 (fr) 1995-03-15

Family

ID=10648994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89203144A Revoked EP0375022B1 (fr) 1988-12-22 1989-12-11 Détergent solide sous forme de bloc

Country Status (8)

Country Link
EP (1) EP0375022B1 (fr)
AU (1) AU624204B2 (fr)
DE (1) DE68921718T2 (fr)
ES (1) ES2069576T3 (fr)
FI (1) FI95927C (fr)
GB (1) GB8830010D0 (fr)
NZ (1) NZ231825A (fr)
ZA (1) ZA899844B (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4204489C1 (fr) * 1992-02-14 1993-04-29 Ecosan Hygiene Gmbh, 6450 Hanau, De
WO1994023010A1 (fr) * 1993-04-01 1994-10-13 Unilever N.V. Briquettes de detergent solide
WO1995007976A2 (fr) * 1993-09-13 1995-03-23 Diversey Corporation Detergent en comprimes, son procede de fabrication et son mode d'utilisation
EP0646166A1 (fr) * 1991-07-03 1995-04-05 Winbro Group, Ltd. Detergent en pain et procede de fabrication dudit detergent
WO1996028530A1 (fr) * 1995-03-11 1996-09-19 The Procter & Gamble Company Composition de detergent sous forme de comprime
WO1996029387A1 (fr) * 1995-03-22 1996-09-26 Unilever N.V. Procede de formation de detergents en comprimes fortement caustiques
WO1997018291A1 (fr) * 1995-11-13 1997-05-22 Unilever N.V. Bloc detergent solide
WO1997018292A1 (fr) * 1995-11-13 1997-05-22 Unilever N.V. Bloc detergent solide
US5658874A (en) * 1994-11-14 1997-08-19 Lever Brothers Company, Division Of Conopco, Inc. Production of detergent tablet compositions
US5719111A (en) * 1995-02-17 1998-02-17 Lever Brothers Company, Division Of Conopco, Inc. Process for preparing a solid detergent block
US5759976A (en) * 1993-09-13 1998-06-02 Diversey Lever, Inc. Process for forming tableted high-caustic detergent
GB2347431A (en) * 1999-03-04 2000-09-06 Procter & Gamble Detergent tablet
ITMI20130391A1 (it) * 2013-03-15 2014-09-16 Euroacque S R L Ricambio per dosatori proporzionali di polifosfato
US9890350B2 (en) 2015-10-28 2018-02-13 Ecolab Usa Inc. Methods of using a soil release polymer in a neutral or low alkaline prewash
US11571381B2 (en) 2017-04-19 2023-02-07 Kao Corporation Composition for forming coating

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH471891A (de) * 1963-12-31 1969-04-30 Unilever Nv Verfahren zur Herstellung einer Reinigungsmitteltablette
GB1175749A (en) * 1966-03-24 1969-12-23 Renato Altieri Improvements in or relating to Detergents
EP0000076A1 (fr) * 1977-06-01 1978-12-20 THE PROCTER & GAMBLE COMPANY Comprimé détergent
EP0003769A1 (fr) * 1978-02-07 1979-09-05 Economics Laboratory, Inc. Article contenant un détergent façonné et méthode pour sa préparation et son utilisation
EP0264701A1 (fr) * 1986-10-13 1988-04-27 Henkel Kommanditgesellschaft auf Aktien Comprimés de nettoyage pour le lavage de la vaisselle en machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4933100A (en) * 1988-01-19 1990-06-12 Colgate-Palmolive Co. Built synthetic organic detergent composition patties and processes for washing laundry therewith

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH471891A (de) * 1963-12-31 1969-04-30 Unilever Nv Verfahren zur Herstellung einer Reinigungsmitteltablette
GB1175749A (en) * 1966-03-24 1969-12-23 Renato Altieri Improvements in or relating to Detergents
EP0000076A1 (fr) * 1977-06-01 1978-12-20 THE PROCTER & GAMBLE COMPANY Comprimé détergent
EP0003769A1 (fr) * 1978-02-07 1979-09-05 Economics Laboratory, Inc. Article contenant un détergent façonné et méthode pour sa préparation et son utilisation
EP0264701A1 (fr) * 1986-10-13 1988-04-27 Henkel Kommanditgesellschaft auf Aktien Comprimés de nettoyage pour le lavage de la vaisselle en machine

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0646166A1 (fr) * 1991-07-03 1995-04-05 Winbro Group, Ltd. Detergent en pain et procede de fabrication dudit detergent
EP0646166A4 (fr) * 1991-07-03 1995-06-07 Winbro Group Ltd Detergent en pain et procede de fabrication dudit detergent.
US5474184A (en) * 1992-02-14 1995-12-12 Ecosan Hygiene Gmbh. Process for producing detergent and the like in reusable and recyclable receptacles, recyclable and reusable receptacles and apparatus for use of filled receptacles
EP0555514A2 (fr) * 1992-02-14 1993-08-18 ECOSAN HYGIENE GmbH Récipients réutilisable contenant des produits de nettoyage, de désinfection et/ou de conservation
WO1993016166A2 (fr) * 1992-02-14 1993-08-19 Ecosan Hygiene Gmbh Recipient re-utilisable contenant des produits de lavage, de nettoyage, de desinfection et/ou de conservation
WO1993016166A3 (fr) * 1992-02-14 1993-11-25 Ecosan Hygiene Gmbh Recipient re-utilisable contenant des produits de lavage, de nettoyage, de desinfection et/ou de conservation
EP0555514A3 (en) * 1992-02-14 1994-10-19 Ecosan Hygiene Gmbh Re-usable receptacle containing washing, cleaning, desinfecting and/or preserving agents
DE4204489C1 (fr) * 1992-02-14 1993-04-29 Ecosan Hygiene Gmbh, 6450 Hanau, De
WO1994023010A1 (fr) * 1993-04-01 1994-10-13 Unilever N.V. Briquettes de detergent solide
US5518646A (en) * 1993-04-01 1996-05-21 Lever Industrial Company, Division Of Indopco, Inc. Solid detergent briquettes
AU699430B2 (en) * 1993-09-13 1998-12-03 Diversey Ip International Bv Tableted detergent, method of manufacture and use
WO1995007976A2 (fr) * 1993-09-13 1995-03-23 Diversey Corporation Detergent en comprimes, son procede de fabrication et son mode d'utilisation
US5552079A (en) * 1993-09-13 1996-09-03 Diversey Corporation Tableted detergent, method of manufacture and use
WO1995007976A3 (fr) * 1993-09-13 1995-06-01 Diversey Corp Detergent en comprimes, son procede de fabrication et son mode d'utilisation
US5759976A (en) * 1993-09-13 1998-06-02 Diversey Lever, Inc. Process for forming tableted high-caustic detergent
US5658874A (en) * 1994-11-14 1997-08-19 Lever Brothers Company, Division Of Conopco, Inc. Production of detergent tablet compositions
US5719111A (en) * 1995-02-17 1998-02-17 Lever Brothers Company, Division Of Conopco, Inc. Process for preparing a solid detergent block
WO1996028530A1 (fr) * 1995-03-11 1996-09-19 The Procter & Gamble Company Composition de detergent sous forme de comprime
WO1996029387A1 (fr) * 1995-03-22 1996-09-26 Unilever N.V. Procede de formation de detergents en comprimes fortement caustiques
AU714999B2 (en) * 1995-03-22 2000-01-13 Johnsondiversey, Inc. Process for forming tableted high-caustic detergent
WO1997018291A1 (fr) * 1995-11-13 1997-05-22 Unilever N.V. Bloc detergent solide
US5759977A (en) * 1995-11-13 1998-06-02 Diversey Lever, Inc. Solid detergent block
AU700879B2 (en) * 1995-11-13 1999-01-14 Johnsondiversey, Inc. Solid detergent block
AU704612B2 (en) * 1995-11-13 1999-04-29 Johnsondiversey, Inc. Solid detergent block
WO1997018292A1 (fr) * 1995-11-13 1997-05-22 Unilever N.V. Bloc detergent solide
GB2347431A (en) * 1999-03-04 2000-09-06 Procter & Gamble Detergent tablet
ITMI20130391A1 (it) * 2013-03-15 2014-09-16 Euroacque S R L Ricambio per dosatori proporzionali di polifosfato
US9890350B2 (en) 2015-10-28 2018-02-13 Ecolab Usa Inc. Methods of using a soil release polymer in a neutral or low alkaline prewash
US10377979B2 (en) 2015-10-28 2019-08-13 Ecolab Usa Inc. Methods of using a soil release polymer in a prewash composition
US11571381B2 (en) 2017-04-19 2023-02-07 Kao Corporation Composition for forming coating

Also Published As

Publication number Publication date
NZ231825A (en) 1992-09-25
EP0375022B1 (fr) 1995-03-15
FI896073A0 (fi) 1989-12-19
GB8830010D0 (en) 1989-02-15
ZA899844B (en) 1991-08-28
DE68921718T2 (de) 1995-07-13
AU4696289A (en) 1990-06-28
DE68921718D1 (de) 1995-04-20
AU624204B2 (en) 1992-06-04
EP0375022A3 (fr) 1991-08-14
FI95927C (fi) 1996-04-10
ES2069576T3 (es) 1995-05-16
FI95927B (fi) 1995-12-29

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