EP0093011B1 - Detergent bars - Google Patents

Detergent bars Download PDF

Info

Publication number
EP0093011B1
EP0093011B1 EP83302353A EP83302353A EP0093011B1 EP 0093011 B1 EP0093011 B1 EP 0093011B1 EP 83302353 A EP83302353 A EP 83302353A EP 83302353 A EP83302353 A EP 83302353A EP 0093011 B1 EP0093011 B1 EP 0093011B1
Authority
EP
European Patent Office
Prior art keywords
alumino
sheet
silicate
iron
weight
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.)
Expired
Application number
EP83302353A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0093011A1 (en
Inventor
Geoffrey Irlam
Michael Richard Lowry
Richard Michael Twemlow
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
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP0093011A1 publication Critical patent/EP0093011A1/en
Application granted granted Critical
Publication of EP0093011B1 publication Critical patent/EP0093011B1/en
Expired legal-status Critical Current

Links

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
    • C11D9/00—Compositions of detergents based essentially on soap
    • C11D9/04—Compositions of detergents based essentially on soap containing compounding ingredients other than soaps
    • C11D9/06—Inorganic compounds
    • C11D9/18—Water-insoluble compounds

Definitions

  • the invention is applicable to soap bars suitable for personal washing and fabric cleaning in which soaps, that is water soluble salts of long chain (C 8 to C 20 ) mono-carboxylic acids form at least 40% by weight of the bar.
  • Non-soap detergent actives suitable for use in detergent bars may also be present. Examples of these detergents are alkyl benzene sulphonates, acyl isethionates, alcohol sulphates, ethoxylated alcohols, alkane sulphonates and alkene sulphonates.
  • Sheet alumino-silicates for example kaolins containing above 0.2% of iron would be seen generally as unsuitable for inclusion in a detergent bar.
  • iron can exist in sheet alumino-silicates in two general environments as a 'bound' form which is intimately associated with the lattice and a 'free' form which is associated with the alumino-silicate lattice by means of weaker bonds.
  • a clay (sheet alumino-silicate) with a free iron content of not more than 50 ppm has been found to be usable in a soap based detergent bar even when the latter contains free fatty acid. The presence of this latter component usually increases the discolouration and odour degradation found with high concentrations of iron.
  • a usual level of free fatty acid is at least 1% by weight of the bar.
  • the sheet alumino-silicate, i.e. kaolin, component will usually be present in the bar at a level at least about 5% by weight and may form up to about 50% of the bar.
  • the sheet alumino-silicate prefferably be present in an amount below that which would provide a level of 10 ppm free iron in the bar. Levels of free iron above this level may not be fully sequestered by the usual commercial stabiliser systems. Kaolin is the preferred sheet alumino-silicate.
  • the present invention allows the incorporation of clays (sheet alumino-silicate) which would be dismissed from consideration as a component because of their high iron content provided the clay sample is tested to determine the free iron content.
  • the total iron concentration is measured using a method destructive of the alumino-silicate structure while free iron is measured by a leaching step.
  • the sample is allowed to cool and is then dissolved by stirring with a solution consisting of 4% nitric and 2% tartaric acids.
  • a solution consisting of 4% nitric and 2% tartaric acids.
  • the solution is made up to a known standard volume (50 mls) at 20°C with the nitric/tartaric acid mixture.
  • a soap base derived from a feedstock of tallow (58%) and coconut oil (42%) was prepared using normal processing; 5.75% free coconut fatty acids were added.
  • the base contained normal amounts of opacifier, perfume and stabiliser.
  • Kaolin (10% by weight) was included in the test bars at the milling step; three samples of test soap bars were prepared, each containing a specified sample of kaolin.
  • AE colour deterioration
  • Sample A and B are found to provide acceptable degradation for commercial use.
  • Sample C gave a higher colour degradation than Sample B through the latter had a higher level of total iron.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (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)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Detergent Compositions (AREA)
EP83302353A 1982-04-28 1983-04-26 Detergent bars Expired EP0093011B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8212321 1982-04-28
GB8212321 1982-04-28

Publications (2)

Publication Number Publication Date
EP0093011A1 EP0093011A1 (en) 1983-11-02
EP0093011B1 true EP0093011B1 (en) 1986-06-18

Family

ID=10530039

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83302353A Expired EP0093011B1 (en) 1982-04-28 1983-04-26 Detergent bars

Country Status (6)

Country Link
EP (1) EP0093011B1 (it)
AU (1) AU552636B2 (it)
BR (1) BR8302155A (it)
DE (1) DE3364167D1 (it)
IN (1) IN157140B (it)
ZA (1) ZA832968B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8505607D0 (en) * 1985-03-05 1985-04-03 Procter & Gamble Ltd Detergent compositions
GB8518910D0 (en) * 1985-07-26 1985-09-04 Procter & Gamble Ltd Toilet compositions
DE3612701A1 (de) * 1986-04-15 1987-10-22 Degussa Waschmittel in stueckiger form

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE339047C (de) * 1915-08-22 1921-07-12 Juenger & Gebhardt G M B H Verfahren zur Herstellung fester Toilette- und Haushaltungsseifen in Stuecken oder Pulverform
FR649731A (fr) * 1927-07-19 1928-12-27 Ind Chimique Sa Procédé de préparation de savons stables aux sels de dureté de l'eau et produitsindustriels nouveaux en résultant
FR888784A (fr) * 1942-12-04 1943-12-22 Procédé de fabrication de savons à base de gel de silice et à basse teneur en acides gras
CH397127A (de) * 1964-09-25 1965-08-15 Diethelm Victor Körperpflegemittel auf Basis von Natronseife

Also Published As

Publication number Publication date
AU552636B2 (en) 1986-06-12
DE3364167D1 (en) 1986-07-24
BR8302155A (pt) 1983-12-27
EP0093011A1 (en) 1983-11-02
ZA832968B (en) 1984-12-24
IN157140B (it) 1986-01-25
AU1394083A (en) 1983-11-03

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