EP0311175A2 - Desinfektionsmittel - Google Patents

Desinfektionsmittel Download PDF

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Publication number
EP0311175A2
EP0311175A2 EP19880202094 EP88202094A EP0311175A2 EP 0311175 A2 EP0311175 A2 EP 0311175A2 EP 19880202094 EP19880202094 EP 19880202094 EP 88202094 A EP88202094 A EP 88202094A EP 0311175 A2 EP0311175 A2 EP 0311175A2
Authority
EP
European Patent Office
Prior art keywords
weight
composition
composition according
weight ratio
alkali metal
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
EP19880202094
Other languages
English (en)
French (fr)
Other versions
EP0311175B1 (de
EP0311175A3 (en
Inventor
Johannes Jacobus Maria De Ridder
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
Original Assignee
Unilever PLC
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=10625009&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0311175(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Unilever PLC filed Critical Unilever PLC
Publication of EP0311175A2 publication Critical patent/EP0311175A2/de
Publication of EP0311175A3 publication Critical patent/EP0311175A3/en
Application granted granted Critical
Publication of EP0311175B1 publication Critical patent/EP0311175B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/395—Bleaching agents
    • C11D3/3956—Liquid compositions

Definitions

  • the present invention is concerned with a sanitizing product which contains a hypohalite bleach.
  • hypohalite bleach which, with prolonged use, can lead to spot corrosion of some stainless steel parts. This especially occurs when the machine is not operating, and particularly at spots which are near the spray nozzles for the sanitizer solution.
  • any putative corrosion inhibitor must be soluble in an aqueous liquid (such sanitizers must be dosed as liquids).
  • an insufficient level of such inhibitor actually increases corrosion as compared to that observed with equivalent products totally devoid of any inhibitor.
  • a liquid sanitizer composition comprising at least 2% by weight of a caustic agent, from 0 to 1% of a surfactant and at least 3% by weight of a hypohalite bleach and an amount of an alkali metal neutral silicate such that the weight ratio of silicate ions to free halogen is at least 1:5 and the weight ratio of the hypohalite bleach to other water-soluble electrolyte in the composition is at most 1:1.
  • hypohalites such as sodium hypochlorite
  • hypochlorites exert their sanitizing action by release of free oxygen to leave sodium chloride.
  • commercially available hypochlorites do indeed contain trace impurities of the corresponding chloride.
  • free halogen means the total halogen in the composition, whether as a halide ion or in the form of the corresponding hypohalite.
  • hypochlorite compositions are characterized by their content of "available chlorine". Methods for determining the "available chlorine" of compositions containing chlorine bleach are well known in the art. In accordance with usual practice, the available chlorine is defined in this application as the amount of chlorine which can be liberated from a composition by acidification and addition of at least one molar equivalent of chloride ions.
  • the weight ratio of silicate ions to free halogen is from 1:5 to 1:1.5.
  • the weight ratio of hypohalite bleach to other water-soluble electrolyte in the composition is from 1:2 to 1:1.
  • hypohalite bleaches are the alkali metal hypochlorites, especially the sodium salt.
  • the composition further comprises from l to 5% of an alkali metal condensed phosphate builder, such as sodium or potassium tripolyphosphate.
  • an alkali metal condensed phosphate builder such as sodium or potassium tripolyphosphate.
  • the pH of the composition is at least 12.0.
  • the caustic agent in the composition is an alkali metal hydroxide or metasilicate, such as sodium hydroxide, potassium hydroxide, sodium metasilicate or potassium metasilicate.
  • the relative amount of sodium and potassium ions in the total composition should be chosen such that there is no precipitation of any tripoly phosphate present, in the form of a precipitate of the sodium salt.
  • the surfactant which may be present in an amount of 0.1% by weight, is essentially a foam depressor.
  • alkali metal neutral silicate means one in which the ratio of silicate to alkali metal oxide species is greater than 3:1.
  • a typical example is sodium neutral silicate having an SiO2:Na2O ratio of 3.4:1.
  • compositions were formulated using 6% by weight of a concentrated stock solution of potassium hydroxide containing 50% by weight of potassium hydroxide, and 31.3% by weight of a concentrated stock solution of sodium hypochlorite containing 19.2% by weight of sodium hypochlorite (calculated as available chlorine).
  • Examples 1-4 were formulated using a low sodium chloride impurity bleach, whereas Examples 5-8 were formulated using a regular grade, resulting in NaCl contents in the total composition of 3 and 5% by weight, respectively.
  • the sodium silicate was added as a concentrated stock solution containing 34% by weight of active SiO2:Na2O in a ration of 3.4:1.
  • the solution was applied neat to stainless steel discs and left for sufficient time for visible corrosion to be apparent.
  • the corrosion apparent was rated on an arbitrary scale of 1-10 where 1 refers to no corrosion and 10 refers to severe attack.
  • compositions were prepared using the same stock solutions as in Examples 1-8, but additionally containing potassium tripolyphosphate. The latter was added as a concentrated stock solution containing 50% by weight of potassium tripolyphosphate. Clear solutions were obtained without any signs of precipitates being formed. The corrosion ratings were similar to those of Examples 1-4 or 5-8, depending on the amount of NaCl impurity of the sodium hypochlorite solution used. Ex Wt.% silicate* Wt.% SiO2 Wt.% NaCl Impurity Wt. ratio SiO2 : free halogen Wt.

Landscapes

  • 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)
  • Detergent Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
EP88202094A 1987-10-08 1988-09-27 Desinfektionsmittel Expired - Lifetime EP0311175B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8723675 1987-10-08
GB878723675A GB8723675D0 (en) 1987-10-08 1987-10-08 Sanitizer

Publications (3)

Publication Number Publication Date
EP0311175A2 true EP0311175A2 (de) 1989-04-12
EP0311175A3 EP0311175A3 (en) 1990-04-11
EP0311175B1 EP0311175B1 (de) 1994-01-05

Family

ID=10625009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88202094A Expired - Lifetime EP0311175B1 (de) 1987-10-08 1988-09-27 Desinfektionsmittel

Country Status (9)

Country Link
EP (1) EP0311175B1 (de)
JP (1) JPH01128907A (de)
AU (1) AU607813B2 (de)
BR (1) BR8805157A (de)
DE (1) DE3886873T2 (de)
ES (1) ES2061634T3 (de)
GB (1) GB8723675D0 (de)
NO (1) NO173023C (de)
ZA (1) ZA887548B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000549A1 (en) * 1992-06-26 1994-01-06 Unilever Plc Improvements to bleaching compositions
EP0653483A1 (de) * 1993-11-11 1995-05-17 The Procter & Gamble Company Bleichmittelzusammensetzungen enthaltend Hypochlorit
US6211131B1 (en) 1996-05-10 2001-04-03 The Clorox Company Sequesterants as hypochlorite bleach enhancers
WO2004029354A1 (en) * 2002-09-27 2004-04-08 Unilever N.V. Composition and method for bleaching a substrate
WO2007079881A1 (de) * 2005-12-29 2007-07-19 Henkel Kommanditgesellschaft Auf Aktien Korrosionsinhibierung flüssiger hypochlorithaltiger reinigungsmittel
US7786066B2 (en) 2005-12-30 2010-08-31 Henkel Ag & Co. Kgaa Stability of detergents containing hypochlorite, phosphonate chelant, and optical brightener
US8008238B2 (en) 2005-12-22 2011-08-30 Henkel Ag & Co. Kgaa Odor reduction for agents containing hypochlorite

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802127C1 (de) * 1988-01-26 1988-12-01 Kaiser, H.-G.
JPH0214298A (ja) * 1988-06-30 1990-01-18 Matsushita Electric Ind Co Ltd 洗浄機槽用洗浄剤およびその洗浄方法
US5843190A (en) * 1993-11-11 1998-12-01 The Procter & Gamble Company Hypochlorite bleaching compositions

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB490092A (en) * 1936-10-10 1938-08-09 Ig Farbenindustrie Ag Process for the production of cleansing agents
GB1320919A (en) * 1969-11-07 1973-06-20 Albright & Wilson Detergent composition
JPS4926688B1 (de) * 1970-12-09 1974-07-11
US3697431A (en) * 1971-01-22 1972-10-10 Clorox Co Liquid drain opening composition and method
US4339235A (en) * 1979-12-06 1982-07-13 Economics Laboratory, Inc. Methods and compositions for bleaching of mycological stain
JPS5690898A (en) * 1979-12-25 1981-07-23 Nippon Rasukatsuto Kk Cleaning agent for household bath tub
JPS58196297A (ja) * 1982-05-12 1983-11-15 ア−ス製薬株式会社 風呂釜洗浄剤
US4752409A (en) * 1985-06-14 1988-06-21 Colgate-Palmolive Company Thixotropic clay aqueous suspensions

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000549A1 (en) * 1992-06-26 1994-01-06 Unilever Plc Improvements to bleaching compositions
EP0653483A1 (de) * 1993-11-11 1995-05-17 The Procter & Gamble Company Bleichmittelzusammensetzungen enthaltend Hypochlorit
US6211131B1 (en) 1996-05-10 2001-04-03 The Clorox Company Sequesterants as hypochlorite bleach enhancers
US6297209B1 (en) 1996-05-10 2001-10-02 The Clorox Company Sequesterants as hypochlorite bleach enhancers
WO2004029354A1 (en) * 2002-09-27 2004-04-08 Unilever N.V. Composition and method for bleaching a substrate
US6866687B2 (en) 2002-09-27 2005-03-15 Unilever Home & Personal Care Usa, A Division Of Conopco, Inc. Composition and method for bleaching a substrate
US8008238B2 (en) 2005-12-22 2011-08-30 Henkel Ag & Co. Kgaa Odor reduction for agents containing hypochlorite
WO2007079881A1 (de) * 2005-12-29 2007-07-19 Henkel Kommanditgesellschaft Auf Aktien Korrosionsinhibierung flüssiger hypochlorithaltiger reinigungsmittel
US7786066B2 (en) 2005-12-30 2010-08-31 Henkel Ag & Co. Kgaa Stability of detergents containing hypochlorite, phosphonate chelant, and optical brightener

Also Published As

Publication number Publication date
ES2061634T3 (es) 1994-12-16
AU2345488A (en) 1989-04-13
DE3886873T2 (de) 1994-05-19
NO173023B (no) 1993-07-05
BR8805157A (pt) 1989-05-16
NO884451D0 (no) 1988-10-06
ZA887548B (en) 1990-06-27
DE3886873D1 (de) 1994-02-17
EP0311175B1 (de) 1994-01-05
JPH01128907A (ja) 1989-05-22
AU607813B2 (en) 1991-03-14
NO884451L (no) 1989-04-10
GB8723675D0 (en) 1987-11-11
NO173023C (no) 1993-10-13
EP0311175A3 (en) 1990-04-11

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