CA2044490C - Lavatory cleansing block - Google Patents

Lavatory cleansing block

Info

Publication number
CA2044490C
CA2044490C CA 2044490 CA2044490A CA2044490C CA 2044490 C CA2044490 C CA 2044490C CA 2044490 CA2044490 CA 2044490 CA 2044490 A CA2044490 A CA 2044490A CA 2044490 C CA2044490 C CA 2044490C
Authority
CA
Canada
Prior art keywords
weight
block according
cleansing block
lavatory
lavatory cleansing
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 - Fee Related
Application number
CA 2044490
Other languages
French (fr)
Other versions
CA2044490A1 (en
Inventor
Bryan Stuart Joy
George Kerr Rennie
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
Priority to GB909013539A priority Critical patent/GB9013539D0/en
Priority to GB9013539.3 priority
Application filed by Unilever PLC filed Critical Unilever PLC
Publication of CA2044490A1 publication Critical patent/CA2044490A1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10677791&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2044490(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application granted granted Critical
Publication of CA2044490C publication Critical patent/CA2044490C/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND 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
    • C11D3/02Inorganic compounds ; Elemental compounds
    • C11D3/04Water-soluble compounds
    • C11D3/046Salts
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND 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
    • C11D1/02Anionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials characterised by their shape or physical properties
    • C11D17/0047Detergents in the form of bars or tablets
    • C11D17/0056Lavatory cleansing blocks
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND 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
    • C11D3/02Inorganic compounds ; Elemental compounds
    • C11D3/12Water-insoluble compounds
    • C11D3/1233Carbonates, e.g. calcite, dolomite
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND 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
    • C11D3/395Bleaching agents
    • C11D3/3955Organic bleaching agents
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND 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
    • C11D3/50Perfumes
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND 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
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds

Abstract

A lavatory rim cleansing block comprising: 30 to 80 % by weight of an anionic surfactant; 0 to 50 % by weight of an inert or electrolyte filler; 5 to 50 % by weight of a water-soluble bleaching agent; 5 to 15 % by weight of a hydrophobic structurant, preferably an oily liquid perfume. The weight ratio between the anionic surfactant and the filler, if electrolytic, is preferably greater than 2 and the preferred water-soluble bleaching agent is potassium dichloro cyanurate.

Description

2044490 c 7243 (R) T~AvAToRy CT.T~'AN~::TNG BLOCK
5 The present invention is concerned with lavatory cleansing blocks and a process for making them. More in particular, it relates to ~l~An~in~ blocks which are intended for use as a cleansing, sanitizing and deodorizing block contained in a device which is hung 10 below the rim of toilet bowls. The block is thereby activated by the flush water and effects its cleaning and sanitizing action each time the bowl is f lushed with flush water from the cistern. These so-called lavatory rim blocks are not in ~o~ contact with water, as 15 distinct from the so-called in-cistern type of cleansing blocks which are constantly immersed in the f lush water cistern of lavatory bowls. It will be evident that such blocks will have - le~ly different requirements as to structure, rate of wear, cracking, mushing and swelling 20 properties, foam properties and perfume generation.
~uch lAvatory rim block~ are known in the ~ rt . For inst~nce, the Euro~e~n pntent ~r~l;c~ir~n 167,210, p..~~ h~fl ~TAnuJ~ry 8, 1986, aisclosel~ ~n extruded 25 l~v~tory rim block which i~ free from ~Ar~-dichloro benzen~, comprising 40 to 90% by weight of ~n ~nionic ~urf~ctant, 5 to 55 % by weight of ~n inert or electrolyte ~iller, ~nd 5 to 15 % by weight of an oily liquid ~erfume, the weight ratio betwQen t~e 30 ~nionic ~urfnct~nt and the filler, if electrolytic, being gre~t~r th~n 2.
Whereas such blocks have good cleansing properties, they have a very limited sanitizing effect on the micro-35 organisms which are always present in the toilet bowl.
Y
-r ~ 2044~90 2 C 7243 (R) EP-A-341836 (JEYES) discloses an extruded lavatory cleansing block with a good sanitising and cleansing effect, which block comprises an anionic surfactant and a chlorinated cuanuric acid derivative. However, this 5 block also comprises a third essential component being a source of specified metal ions, such as barium chloride, cadmium sulphate and calcium chloride, which component may be environmentally less acceptable. Furthermore, this block is especially designed to be used in the lo cistern of a lavatory.
It is an object of the present invention to provide a lavatory rim block which p..cc,,cl ~ a good cleansing, sanitizing and perfume generating activity.
15 MJ1~:UV~L, the blocks must be stable for a prolonged period under the humid conditions of a toilet bowl.
It has now been found that these and other objects may be achieved by means of the lavatory rim blocks 20 according to the invention, which comprise: 30 to 80 %
by weight of an anionic surfactant; 0 to 50 % by weight of an inert or electrolyte filler; 5 to 50 % by weight of a water-soluble hl~hing agent; 5 to 15 % by weight of a hydrophobic structurant. The weight ratio between 25 the anionic surfactant and the filler, if electrolytic, is thereby preferably greater than 2.
Surprisingly, the stability of the water-soluble hl~ .hin~ agent inside the lavatory block proved to be 30 very good, while at the same time the delivery of bleaching agent to the f lush water was more than satisfactory and constant over a prolonged period.

2 0 4 4 4 ~ 0 c 7243 ~R) The water-soluble bleaching agent used in accordance with the invention is an act:ive chlorine bleaching agent such as an alkali metal salts of dichloro cyanuric acid. The preferred water-soluble bleaching agent is potassium 5 dichlorocyanurate. The hlf~ h;ng agent is preferably present in an amount of 10 to 25 % by weight.
The blocks comprise 5-15 % by weight of a hydrophobic structurant. This is preferably a liquid oily perfume, 10 of the kind described in the European patent application 167,210, published January 8, 1986. It will be understood that the liquid oily perfume must be stable in the presence of the water-soluble bleaching agent. Suitable oily perfumes can be easily selected by testing them in 15 combination with the water-soluble bleaching agent.
Examples of suitable bleach-stable perfumes are *Verdeo 898, ~Bonanza 048 and ~Ponderosa 431 all ex IFF, and LB 132 ex Quest .
20 EIowever, the perfume may be partially or totally replaced by another hydrophobic structurant, for example fatty acids or fatty alcohols, typically having 12 to 16 carbon atoms.
The anionic surfactants which may be used in the present 25 invention include for example alkali metal salts of alkyl substituted benzene sulphonates, alkali metal long chain alkyl sulphates, alkali metal ether sulphates derived from long chain alcohols and alkyl phenols, alkali metal alkane sulphonates, alkali metal olefin sulphonates and alkali 30 metal sulphosuccinates, whereby the sodium salts are generally preferred. - Most favoured are sodium alkyl benzene sulphonates. ~
Desirably, the anionic surfactant used in the block - -~ denotes trade mark X

2~4~4~0 - 4 C 7243 (R) should have a relatively low perfume solubility and should only ab60rb water to optimize the ratio of oily liquid and ~ qr phases to solid and inverted hexagonal phases.

Preferred anionic surfactants are sodium Cg-Cl4 alkyl benzene sulphonates, sodium C11-C20 olefin sulphonates, sodium C11-C20 alkane sulphonates and sodium long chain C10-Cl4 alkyl sulphates or mixtures thereof, sodium 10 alkyl benzene sulphonates being particularly preferred as the main surfactant c In addition, other types of surfactants, such as nonionic surfactants such as the ethoxylated fatty 15 alcohol n~n;t~nit~, fatty acid alkanolamides and amine oxides, may be inC~/L~JLclted as desired. However, they should not be present in amounts ~Y~ee~l; n~ 2 0 % by weight, preferably 10 % by weight, because they could easily adversely affect the foaming properties and the 20 rate of wear of the blocks.
The f iller used in the lavatory rim blocks of the present invention can be an electrolyte, such as sodium sulphate, sodium carbonate and a rh~rh~rous containing 25 sodium salt, e.g. sodium tr;rh~srhAte, h~ i~rh~spate, pyrophosphate, and orthorh~srhi~te~ The filer may also be an inert material such as calcite, clay or urea.
It was found that a high electrolyte content tends to 30 i~u~yLess the solubility of the block to such an extent that there is insufficient active present in the bowl after flushing to generate a stable foam. Hence, if an electrolyte is used as the filler, it is desirable to have a high ratio of surfactant to filler levels in the 35 block, i.e. a high proportion of surfactant and a low proportion of electrolyte. It was found that the anionic 2~44490 C 7243 (R) surfactant/electrolyte filler weight ratio should be greater than about 2 in order to avoid excessive swelling in use and to provide adequate foam generation and stability. If an inert filler is used, the ratio of 5 sur~actant to filler proved to be not critical.
The blocks according to the invention can be made by mixing the ingredients to form a dough of suitable consistency which can then be extruded and cut into 10 lengths to form blocks having the desired properties.
The extrusion process can be suitably carried out using simple conventional extrusion equipment such as normally used for manufacturing soap bars.
The lavatory rim blocks formed in accordance with the invention may also comprise non-surfactant nonionic polymeric materials such as polyethylene glycols, and minor ingredients such as dyes, germicides, fungicides 20 and opacifiers, whereby the compatibility of such ingredients with the water-soluble bll~rhin~ agent must be observed.
The invention will now be illustrated by means of the 25 following non-limiting examples.
~AMPr ~C 1-3 Lavatory rim blocks were prepared from the ingredients 30 listed in the following Table, wherein the amounts are given as % by weight. me ingredients were mixed to form a dough which was subse~u~lll ly extruded in a conventional soap-extrusion dyyclLcll_US and finally cut into lengths of approximately 8 cm. me obtained blocks 35 had a weight of about 50 g.

~ 2~44490 6 C 7243 (R) Example 1 i~ 3 NansaR HS 30 1) 60 60 60 Calcite 13 . 5 11 8 . 5 5Sodium sulphate 13 . 5 11 8 . 5 Verdeo IFF 898 2) __ -- 8 C12 fatty alcohol 8 8 --10 1) Nansa HS 85 is sodium Cg-Cl3 alkyl benzene sulphonate having a mean molecular weight 235, ex Marchon Company (contains 10-15 % NaS04 as impurity).
2) Verdeo IFF 898 is a perfume obtainable from IFF.
15 The stability of the hl ~h i n J agent in the rim blocks was tested by placing them in a conventional rim block cage inside a lavatory bowl and flushing the toilet according to a standard pattern, whereaf ter the con~,el.~L~tion of bleaching agent in the flush water was 20 r~trl-m;nr~cl as well as the ~ tion of L~ ;n;n~
bleaching agent in the block. It was found that the bl~ h;n~ agent r~ ;n-~cl stable inside the blocks for some weeks, and that they continued to deliver KDCCA to the f lush water for at least three weeks .

Claims (11)

1. A lavatory rim cleansing block comprising:
30 to 80 % by weight of an anionic surfactant;
0 to 50 % by weight of an inert or electrolyte filler;
5 to 50 % by weight of a water-soluble, active chlorine bleaching agent; and 5 to 15 % by weight of a hydrophobic, liquid, oily perfume structurant .
2. A lavatory cleansing block according to Claim 1, wherein the hydrophobic structurant is a liquid oily perfume .
3. A lavatory cleansing block according to Claim 1 wherein the weight ratio between the anionic surfactant and the filler, if electrolytic, is greater than 2.
4. A lavatory cleansing block according to Claim 1 comprising 10 to 25 % by weight of the water-soluble bleaching agent.
5. A lavatory cleansing block according to Claim 1 wherein the water-soluble bleaching agent is an alkali metal salt of dichloro cyanuric acid, preferably potassium dichloro cyanurate.
6. A lavatory cleansing block according to Claim 1 comprising 50 to 80 % by weight of an anionic surfactant.
7. A lavatory cleansing block according to Claim 1 wherein the anionic surfactant comprises C9-C14 alkylbenzene sulphonate.
8. A lavatory cleansing block according to Claim 1 further comprising a nonionic surfactant in an amount of less than 10 % by weight.
9. A lavatory cleansing block according to Claim 1 comprising 10 to 45 % by weight of an inert or electrolyte filler.
10. A lavatory cleansing block according to Claim 1 comprising 7 to 12 % by weight of the oily liquid perfume.
11. Process for preparing a lavatory block according to any one of Claims 1 to 10, whereby the ingredients are mixed to form a dough, which is then extruded and cut into blocks of suitable lengths.
CA 2044490 1990-06-18 1991-06-13 Lavatory cleansing block Expired - Fee Related CA2044490C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB909013539A GB9013539D0 (en) 1990-06-18 1990-06-18 Lavatory cleansing block
GB9013539.3 1990-06-18

Publications (2)

Publication Number Publication Date
CA2044490A1 CA2044490A1 (en) 1991-12-19
CA2044490C true CA2044490C (en) 1996-12-17

Family

ID=10677791

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2044490 Expired - Fee Related CA2044490C (en) 1990-06-18 1991-06-13 Lavatory cleansing block

Country Status (9)

Country Link
EP (1) EP0462643B1 (en)
JP (1) JPH0765080B2 (en)
AU (1) AU628749B2 (en)
BR (1) BR9102494A (en)
CA (1) CA2044490C (en)
DE (2) DE69104780D1 (en)
ES (1) ES2063436T3 (en)
GB (1) GB9013539D0 (en)
ZA (1) ZA9104661B (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9108574D0 (en) * 1991-04-22 1991-06-05 Jeyes Ltd Lavatory cleansing blocks
GB9225338D0 (en) * 1992-12-03 1993-01-27 Jeyes Group Plc Lavatory cleansing blocks
US5817611A (en) * 1992-12-03 1998-10-06 Jeyes Group, Plc Lavatory cleansing blocks
EP0619367A1 (en) * 1993-04-06 1994-10-12 THE PROCTER & GAMBLE COMPANY Lavatory blocks containing enzymes
US5578559A (en) * 1993-05-14 1996-11-26 Block Drug Company, Inc. Lavatory cleaning block
GB2300423A (en) * 1995-03-27 1996-11-06 Jeyes Group Plc Lavatory cleansing
US5945390A (en) * 1996-05-17 1999-08-31 S. C. Johnson & Son, Inc. Toilet cleansing block
US5990061A (en) * 1996-05-17 1999-11-23 S. C. Johnson & Son, Inc. Toilet cleansing block
ES2150773T3 (en) * 1996-06-12 2000-12-01 Unilever Nv Improvements relating to urinary cleansing blocks.
US6184192B1 (en) * 1997-04-24 2001-02-06 S. C. Johnson & Son, Inc. Chlorinated in-tank toilet cleansing block
DE19721471A1 (en) * 1997-05-22 1998-11-26 Buck Chemie Gmbh Aktivchlorabspaltender toilet cleaning block
AU747962B2 (en) * 1998-02-04 2002-05-30 Unilever Plc Lavatory cleansing composition
US20030156976A1 (en) * 2002-02-11 2003-08-21 Jeyes Group Limited Cleansing blocks
DE102004056554A1 (en) 2004-11-23 2006-05-24 Buck-Chemie Gmbh Liable Sanitärreinigungs- and fragrancing
US20080032912A1 (en) 2006-08-04 2008-02-07 Takasago International Corporation Use of fragrance compositions for the prevention of the development of indole base malodours from fecal and urine based soils
US7709433B2 (en) * 2007-02-12 2010-05-04 S.C. Johnson & Son, Inc. Self-sticking disintegrating block for toilet or urinal
ES2530061T3 (en) 2008-04-15 2015-02-26 Takasago International Corporation malodor reducing composition and uses thereof
DE102010043848A1 (en) * 2010-11-12 2012-05-16 Henkel Ag & Co. Kgaa Spherical WC block on Aniontensidbasis
WO2017146182A2 (en) 2016-02-24 2017-08-31 Takasago International Corporation Household product delivering warming and/or tingling sensations
WO2017146181A2 (en) 2016-02-24 2017-08-31 Takasago International Corporation Household product delivering cooling sensations
EP3211064A1 (en) 2016-02-24 2017-08-30 Takasago International Corporation Stimulating agent

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ189943A (en) * 1978-03-21 1981-11-19 Jeyes Group Ltd Method of cleansing lavatories of the flushwater cistern type
DE2907029A1 (en) * 1979-02-23 1980-09-04 Henkel Kgaa A process for preparing abspuelbloecken for the toilet hygiene
DE3225292C2 (en) * 1982-07-07 1991-01-31 Henkel Kgaa, 4000 Duesseldorf, De
GB8417345D0 (en) * 1984-07-06 1984-08-08 Unilever Plc Para-dichlorobenzene-free lavatory cleansing blocks
GB2178442B (en) * 1985-06-14 1988-12-21 Jeyes Group Ltd Lavatory cleansing compositions
CA1325755C (en) * 1988-04-13 1994-01-04 Eric Dennis Barford Lavatory cleansing blocks

Also Published As

Publication number Publication date
EP0462643A1 (en) 1991-12-27
CA2044490A1 (en) 1991-12-19
ES2063436T3 (en) 1995-01-01
JPH0765080B2 (en) 1995-07-12
BR9102494A (en) 1992-01-21
ZA9104661B (en) 1993-02-24
DE69104780D1 (en) 1994-12-01
AU628749B2 (en) 1992-09-17
AU7838691A (en) 1991-12-19
EP0462643B1 (en) 1994-10-26
JPH04252300A (en) 1992-09-08
GB9013539D0 (en) 1990-08-08
DE69104780T2 (en) 1995-03-02

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