EP0033601A1 - Alkaline cleaning compositions - Google Patents

Alkaline cleaning compositions Download PDF

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Publication number
EP0033601A1
EP0033601A1 EP81300199A EP81300199A EP0033601A1 EP 0033601 A1 EP0033601 A1 EP 0033601A1 EP 81300199 A EP81300199 A EP 81300199A EP 81300199 A EP81300199 A EP 81300199A EP 0033601 A1 EP0033601 A1 EP 0033601A1
Authority
EP
European Patent Office
Prior art keywords
weight
alkali
cleaning compositions
alkaline cleaning
solvent
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.)
Withdrawn
Application number
EP81300199A
Other languages
German (de)
French (fr)
Inventor
Alexander Ewing Harding
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 EP0033601A1 publication Critical patent/EP0033601A1/en
Withdrawn legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02Inorganic compounds
    • C11D7/04Water-soluble compounds
    • C11D7/06Hydroxides
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005Other compounding ingredients characterised by their effect
    • C11D3/0057Oven-cleaning compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/43Solvents

Definitions

  • the present invention relates to alkaline cleaning compositions, particularly aqueous alkaline compositions adapted for use in non-aerosol form and suitable for cleaning hard surfaces such as ovens and the like.
  • the non-ionic surfactant is preferably a polyoxyalkylene alkyl ether such as the "Brij"-type non-ionics. Particularly suitable examples are Brij 35 (polyoxyethylene (23) lauryl ether) and Brij 78 (polyoxyethylene( 20 ) stearyl ether).
  • the quantity of the non-ionic surfactant may be from about 1.5% to 2.5%, preferably about 2% by weight.
  • the alkali is preferably a caustic alkali such as sodium hydroxide or potassium hydroxide.
  • silicates such as potassium silicate with a K 2 0:Si0 2 weight ratio of 1:2 to 2:1.
  • suitable alkali materials are guanidine (formed from guanidine hydrochloride and sodium hydroxide)and mono-,di- and trialkanolamines.
  • the amount of alkali present is preferably from about 1 to about 10% by weight in the case of caustic alkalis and from about 3 to about 30% by weight in the case of an alkali metal silicate. Most preferred ranges are from about 3 to 6% by weight and from about 4 to 10% by weight respectively.
  • the solvent is preferably a high boiling point solvent (i.e. having a boiling point over about 120°C).
  • the preferred solvents are: glycol ethers such as butyl cellusolve, methyl, ethyl or butyl carbitol; pentaerythritol propane 1,2-diol; propylene glycol; and dioxitol.
  • glycol ethers such as butyl cellusolve, methyl, ethyl or butyl carbitol
  • pentaerythritol propane 1,2-diol propylene glycol
  • dioxitol dioxitol.
  • the solvent is preferably present in the amount of from about 5% to about 15%, most preferably about 10% by weight.
  • compositions of the invention may be added up to an amount of about 18% by weight, preferably from about 6% to 12% by weight.
  • the hydrotrope may be selected from alkali metal aryl sulphonates, such as sodium xylene sulphonate, the latter also aiding soil penetration by the composition.
  • a thickening agent may also be present, in an amount up to about 2% by weight, preferably about 0.4% by weight. The thickening agent enables the product to cling better to vertical surfaces and reduces mist on spraying the neat product.
  • Suitable thickening agents include hydroxyethyl cellulose (Natrosol - Registered Trade Mark), lauryl alcohol, stearyl alcohol, magnesium sulphate, sodium carbonate and sodium chloride, hydroxypropylcellulose (Klucel - Registered Trade Mark), acrylate-methacrylate polymer (Latekoll - Registered Trade Mark) or mixtures of these with hydroxyethyl celluloses.
  • the preferred amount of thickening agent is up to about 2% by weight in the case of an organic thickener, more preferably about 0.4% by weight and up to 6% by weight in the case of an inorganic thickener, more preferably about 1 to 3% by weight.
  • the preferred thickener is a cellulose based nonionic polymer especially the sterically hindered natrosol type>. These give much better viscosity stability witn time in these formulations.
  • compositions of the invention include dyes and humectants.
  • Examples 1 to 4 were compared with the prior art formulations A to G for detergency efficiency.
  • the evaluation was based on the average base reflectance measurements (R 460*) on a number of soiled white test plates.
  • the reflectance measurement on a clean plate was 69.7.
  • the results were as follows:

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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)

Abstract

A cleaning composition, particularly for cleaning industrial ovens, contains an aqueous base, from 1% to 6% of a nonionic surfactant such as a polyoxyalkylene alkyl ether, from 1% to 40% of an alkali such as caustic soda and from 5% to 20% of a solvent such as a glycol ether. Hydrotropes, such as sodium xylene sulphonate and thickeners such as hydroxyethyl cellulose may also be present.

Description

  • The present invention relates to alkaline cleaning compositions, particularly aqueous alkaline compositions adapted for use in non-aerosol form and suitable for cleaning hard surfaces such as ovens and the like.
  • It is known from British Patent Specification 1 297 782 to use, as oven cleaning compositions, aqueous alkali compositions which contain caustic alkali, an alkali-stable organic detergent active compound, and an aliphatic monohydric alcohol and which are adapted for use in aerosol form. It is also known from United States Patent Sepcification 3 829 387 to use, as an aerosol oven cleaning composition, an aqueous alkali composition containing caustic alkali, a glycol ether and a non-ionic detergent active compound.
  • We have now surprisingly discovered that particularly good cleaning results can be achieved with a cleaning composition comprising an aqueous base containing:
    • ( i) from about 1% to about 6% by weight of a non-ionic surfactant;
    • (ii) from about 1% to about 40% by weight of an alkali; and
    • (iii) from about 5% to about 20% by weight of a solvent.
  • The non-ionic surfactant is preferably a polyoxyalkylene alkyl ether such as the "Brij"-type non-ionics. Particularly suitable examples are Brij 35 (polyoxyethylene (23) lauryl ether) and Brij 78 (polyoxyethylene(20) stearyl ether). The quantity of the non-ionic surfactant may be from about 1.5% to 2.5%, preferably about 2% by weight.
  • The alkali is preferably a caustic alkali such as sodium hydroxide or potassium hydroxide. Alternatively silicates such as potassium silicate with a K20:Si02 weight ratio of 1:2 to 2:1. Further examples of suitable alkali materials are guanidine (formed from guanidine hydrochloride and sodium hydroxide)and mono-,di- and trialkanolamines. The amount of alkali present is preferably from about 1 to about 10% by weight in the case of caustic alkalis and from about 3 to about 30% by weight in the case of an alkali metal silicate. Most preferred ranges are from about 3 to 6% by weight and from about 4 to 10% by weight respectively.
  • The solvent is preferably a high boiling point solvent (i.e. having a boiling point over about 120°C). The preferred solvents are: glycol ethers such as butyl cellusolve, methyl, ethyl or butyl carbitol; pentaerythritol propane 1,2-diol; propylene glycol; and dioxitol. The solvent is preferably present in the amount of from about 5% to about 15%, most preferably about 10% by weight.
  • Other ingredients may be present in the compositions of the invention..A hydrotrope may be added up to an amount of about 18% by weight, preferably from about 6% to 12% by weight. The hydrotrope may be selected from alkali metal aryl sulphonates, such as sodium xylene sulphonate, the latter also aiding soil penetration by the composition. A thickening agent may also be present, in an amount up to about 2% by weight, preferably about 0.4% by weight. The thickening agent enables the product to cling better to vertical surfaces and reduces mist on spraying the neat product. Suitable thickening agents include hydroxyethyl cellulose (Natrosol - Registered Trade Mark), lauryl alcohol, stearyl alcohol, magnesium sulphate, sodium carbonate and sodium chloride, hydroxypropylcellulose (Klucel - Registered Trade Mark), acrylate-methacrylate polymer (Latekoll - Registered Trade Mark) or mixtures of these with hydroxyethyl celluloses. The preferred amount of thickening agent is up to about 2% by weight in the case of an organic thickener, more preferably about 0.4% by weight and up to 6% by weight in the case of an inorganic thickener, more preferably about 1 to 3% by weight.
  • The preferred thickener is a cellulose based nonionic polymer especially the sterically hindered natrosol type>. These give much better viscosity stability witn time in these formulations.
  • Further optional ingredients in the cleaning compositions of the invention include dyes and humectants.
  • The invention will now be illustrated, purely by way of example, with reference to the following nonlimiting examples, in which parts and percentages are by weight, unless otherwise stated.
  • EXAMPLES 1 TO 4
  • Cleaning compositions were made up according to the following table:
    Figure imgb0001
  • A number of prior art formulations approximately according to the following table were prepared:
    Figure imgb0002
  • Examples 1 to 4 were compared with the prior art formulations A to G for detergency efficiency. The evaluation was based on the average base reflectance measurements (R 460*) on a number of soiled white test plates. The reflectance measurement on a clean plate was 69.7. The results were as follows:
    Figure imgb0003
  • EXAMPLES 5 TO 13
  • The formulations set out in the following table were prepared.
    Figure imgb0004

Claims (1)

1. A cleaning composition comprising an aqueous base containing
( i) from about 1% to about 6% by weight of a nonionic surfactant;
( ii) from about 1% to about 40% by weight of an alkali; and
(iii) from about 5% to about 20% by weight of a solvent.
EP81300199A 1980-01-17 1981-01-16 Alkaline cleaning compositions Withdrawn EP0033601A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8001539A GB2067588A (en) 1980-01-17 1980-01-17 Ovens cleaning compositions
GB8001539 1980-01-17

Publications (1)

Publication Number Publication Date
EP0033601A1 true EP0033601A1 (en) 1981-08-12

Family

ID=10510688

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81300199A Withdrawn EP0033601A1 (en) 1980-01-17 1981-01-16 Alkaline cleaning compositions

Country Status (2)

Country Link
EP (1) EP0033601A1 (en)
GB (1) GB2067588A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248681A2 (en) * 1986-06-06 1987-12-09 Kanegafuchi Chemical Industry Co., Ltd. Method of cleaning the interior of polymerization reactor
EP0337576A2 (en) * 1988-04-13 1989-10-18 Colgate-Palmolive Company Heavy duty hard surface liquid detergent
FR2636961A1 (en) * 1988-09-29 1990-03-30 Vitalis Bernard Composition for cleaning the ventilation system, controlled mechanical ventilation installations and similar installations
AU608589B2 (en) * 1987-04-10 1991-04-11 Colgate-Palmolive Company, The A liquid non-caustic pre-spotting composition
EP0547088A1 (en) * 1990-08-01 1993-06-23 Kay Chemical Company Cooking equipment pretreatment composition and method of use
WO1994001614A2 (en) * 1992-07-08 1994-01-20 Mauvin Material And Chemical Processing Limited Process for de-inking paper and fabric cleaning
WO1996026263A1 (en) * 1995-02-23 1996-08-29 Unilever Plc Process and composition for cleaning surfaces
WO1997004069A1 (en) * 1995-07-18 1997-02-06 Unilever N.V. Concentrated aqueous degreasing cleanser
WO1998050518A1 (en) * 1997-05-02 1998-11-12 The Procter & Gamble Company Cleaning composition, methods, and/or articles for hard surfaces

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS624791A (en) * 1985-06-28 1987-01-10 ライオン株式会社 Liquid detergent composition
US5591702A (en) * 1995-05-25 1997-01-07 Henkel Corporation Stripping compositions with mixtures or organic solvents and uses thereof
DE29610946U1 (en) * 1996-06-24 1996-08-29 Stoffels, Fritz, 53545 Ockenfels System for cleaning metal parts contaminated with burnt-in organic residues

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829387A (en) * 1972-06-22 1974-08-13 American Home Prod Caustic cleaner composition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829387A (en) * 1972-06-22 1974-08-13 American Home Prod Caustic cleaner composition

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0248681A2 (en) * 1986-06-06 1987-12-09 Kanegafuchi Chemical Industry Co., Ltd. Method of cleaning the interior of polymerization reactor
EP0248681A3 (en) * 1986-06-06 1989-07-05 Kanegafuchi Chemical Industry Co., Ltd. Method of cleaning the interior of polymerization reactor
AU608589B2 (en) * 1987-04-10 1991-04-11 Colgate-Palmolive Company, The A liquid non-caustic pre-spotting composition
EP0337576A2 (en) * 1988-04-13 1989-10-18 Colgate-Palmolive Company Heavy duty hard surface liquid detergent
EP0337576A3 (en) * 1988-04-13 1990-05-30 Colgate-Palmolive Company Heavy duty hard surface liquid detergent
FR2636961A1 (en) * 1988-09-29 1990-03-30 Vitalis Bernard Composition for cleaning the ventilation system, controlled mechanical ventilation installations and similar installations
EP0547088A1 (en) * 1990-08-01 1993-06-23 Kay Chemical Company Cooking equipment pretreatment composition and method of use
EP0547088A4 (en) * 1990-08-01 1994-02-23 Kay Chemical Company
WO1994001614A2 (en) * 1992-07-08 1994-01-20 Mauvin Material And Chemical Processing Limited Process for de-inking paper and fabric cleaning
WO1994001614A3 (en) * 1992-07-08 1994-03-03 Mauvin Material And Chemical P Process for de-inking paper and fabric cleaning
WO1996026263A1 (en) * 1995-02-23 1996-08-29 Unilever Plc Process and composition for cleaning surfaces
AU716833B2 (en) * 1995-02-23 2000-03-09 Unilever Plc Process and composition for cleaning surfaces
WO1997004069A1 (en) * 1995-07-18 1997-02-06 Unilever N.V. Concentrated aqueous degreasing cleanser
AU719487B2 (en) * 1995-07-18 2000-05-11 Diversey, Inc. Concentrated aqueous degreasing cleanser
WO1998050518A1 (en) * 1997-05-02 1998-11-12 The Procter & Gamble Company Cleaning composition, methods, and/or articles for hard surfaces

Also Published As

Publication number Publication date
GB2067588A (en) 1981-07-30

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Designated state(s): AT BE CH DE FR GB IT NL SE

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Owner name: UNILEVER NV

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Effective date: 19810910

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Withdrawal date: 19821023

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Effective date: 19830224

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Inventor name: HARDING, ALEXANDER EWING