WO2006000917A1 - Dispensing devices - Google Patents

Dispensing devices Download PDF

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Publication number
WO2006000917A1
WO2006000917A1 PCT/IB2005/002280 IB2005002280W WO2006000917A1 WO 2006000917 A1 WO2006000917 A1 WO 2006000917A1 IB 2005002280 W IB2005002280 W IB 2005002280W WO 2006000917 A1 WO2006000917 A1 WO 2006000917A1
Authority
WO
WIPO (PCT)
Prior art keywords
active composition
container
hollow porous
active
dispensing device
Prior art date
Application number
PCT/IB2005/002280
Other languages
French (fr)
Inventor
Petrus Cornelius Traas
Marten Frederik Koopmans
Original Assignee
Quest International Services B.V.
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 Quest International Services B.V. filed Critical Quest International Services B.V.
Priority to EP05766108A priority Critical patent/EP1761287A1/en
Publication of WO2006000917A1 publication Critical patent/WO2006000917A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/05—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating specially adapted to be released by contact with a liquid, e.g. for toilets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D9/03—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing consisting of a separate container with an outlet through which the agent is introduced into the flushing water, e.g. by suction ; Devices for agents in direct contact with flushing water
    • E03D9/032—Devices connected to or dispensing into the bowl
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
    • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
    • E03D2009/024—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing using a solid substance

Definitions

  • the present invention relates to a dispensing device and particularly, although not exclusively, to an in-toilet and/or air freshener device.
  • Existing air fresheners include containers filled with a perfume where heat is applied via, for example, a wick or an electrical heat source, causing the perfume to evaporate.
  • liquid toilet freshening products in a similar manner.
  • liquid rim products are mounted on the inner rim of a water closet bowl to dose a liquid freshening product into the flushing water.
  • the liquid product may be dosed into the water flow from a porous substrate that is supplied with the liquid product from a container disposed above it
  • EP-A-0785315 describes the delivery of a liquid product into a flow of water from a porous substrate.
  • the liquid product is deposited into the porous substrate from a separate container.
  • WO 99/66139 and WO 99/66140 describe numerous variations of the liquid rim product, including different styles of delivery plate in place of a porous substrate.
  • Disadvantages include the fact that the release of active ingredient tends not to be linear in that it depends on the amount of product remaining in the system, on water and air uptake due to pressure differentials, on the chemical composition of the formulation components and on ambient factors such as heat, light, temperature, humidity and the like.
  • the present invention provides a dispensing device wherein said device comprises at least one sealed hollow porous container containing an active composition, and wherein the active composition is drawn through the pores of the porous container by the action of water and/or air.
  • the invention has particular application for use with so-called in-bowl toilet freshener units and will be described in connection with such application, although other applications such as general air-care are contemplated.
  • This invention is particularly concerned with delivering an active composition such as a fragrance, surfactant, bleach, disinfectant, insecticide, deodorant or cleaning agent, particularly in the form of a solid, gel, solution, dispersion or suspension, and for delivering it to an environment such as a toilet bowl under the action of flush water and/or air.
  • an active composition such as a fragrance, surfactant, bleach, disinfectant, insecticide, deodorant or cleaning agent, particularly in the form of a solid, gel, solution, dispersion or suspension, and for delivering it to an environment such as a toilet bowl under the action of flush water and/or air.
  • the dispensing device may comprise a single hollow porous container or two or more hollow porous containers in any combination, orientation, shape or size as is required by the needs and the situations in which the dispensing device is to be used.

Abstract

A device for dispensing active compositions comprises at least one hollow porous container (1) having an active composition (3) sealed inside the container. The active composition is drawn through the pores of the hollow porous container by the action of, or example, water and/or air. The device of this invention has particular application for use as an in-bowl toilet freshener and/or air-care unit.

Description

TITLE: DISPENSING DEVICES
FIELD OF INVENTION
The present invention is concerned with dispensing devices.
BACKGROUND
The present invention relates to a dispensing device and particularly, although not exclusively, to an in-toilet and/or air freshener device.
Existing air fresheners include containers filled with a perfume where heat is applied via, for example, a wick or an electrical heat source, causing the perfume to evaporate.
Also, it has been known for some time to provide in-toilet products in the form of solid or semi-solid "rim blocks" to be mounted within the inner rim of a water closet bowl where the flushing water will wash over the product and so dissolve or erode it to release active constituents into the water flow.
It is also known to use liquid toilet freshening products in a similar manner. So-called "liquid rim products" are mounted on the inner rim of a water closet bowl to dose a liquid freshening product into the flushing water. In such products the liquid product may be dosed into the water flow from a porous substrate that is supplied with the liquid product from a container disposed above it
US 6,580,875 describes a typical air freshener device utilising a wick and a source of heat.
EP-A-0785315 describes the delivery of a liquid product into a flow of water from a porous substrate. The liquid product is deposited into the porous substrate from a separate container.
WO 99/66139 and WO 99/66140 describe numerous variations of the liquid rim product, including different styles of delivery plate in place of a porous substrate.
Each of these prior art devices has its advantages and disadvantages. Disadvantages include the fact that the release of active ingredient tends not to be linear in that it depends on the amount of product remaining in the system, on water and air uptake due to pressure differentials, on the chemical composition of the formulation components and on ambient factors such as heat, light, temperature, humidity and the like.
The object of the present invention to provide novel, simple and improved dispensing devices for active compositions that are characterized by low cost manufacture, ease of filling, no pressure differentials and high performance efficacy. Still another object of the present invention is to provide dispensing devices particularly adapted for use as in-toilet and/or air freshener products which are less dependent on viscosity than prior art systems and overcomes prior art disadvantages normally associated with the use of in-toilet and/or air freshener products. Yet another object of the present invention is to provide a system for the delivery of active compositions that avoids an initial high rate of release in favour of a more controlled release of said active compositions.
SUMMARY OF INVENTION
The present invention provides a dispensing device wherein said device comprises at least one sealed hollow porous container containing an active composition, and wherein the active composition is drawn through the pores of the porous container by the action of water and/or air. The invention has particular application for use with so-called in-bowl toilet freshener units and will be described in connection with such application, although other applications such as general air-care are contemplated.
This invention is particularly concerned with delivering an active composition such as a fragrance, surfactant, bleach, disinfectant, insecticide, deodorant or cleaning agent, particularly in the form of a solid, gel, solution, dispersion or suspension, and for delivering it to an environment such as a toilet bowl under the action of flush water and/or air.
The present invention also provides active compositions for use with the dispensing device of the invention, wherein said active compositions are chosen to have a viscosity at room temperature (about 20 0C) above 200mPas such that said active compositions are contained within the porous container and, under the action of water and/or air, enter the pores of the hollow porous container by means of capillary forces and are emitted at the surface of the hollow porous container.
The pores of the hollow porous container of this invention may be of a uniform size, or they may be of two or more pore sizes, or they may be of a double pore structure.
The dispensing device may comprise a single hollow porous container or two or more hollow porous containers in any combination, orientation, shape or size as is required by the needs and the situations in which the dispensing device is to be used.
The dispensing device may be provided, for example, as a cube, plate, ring or sphere, as a rod section or in decorative shapes. The container is conveniently in the form of a tubular container, desirably of circular section, defining a reservoir for the active composition. The container may be sealed by an end cap at one or both ends, conveniently with a threaded connection.
The size of the container, and the capacity for the active composition, may be varied to suit requirements, e.g. depending on the intended use.
Where there are two or more hollow porous containers they may contain the same active composition or they may contain different active compositions. This is particularly important where the active materials cannot be mixed due to incompatibility.
The pores of the hollow porous container are fed with an effectively constant concentration of active composition and, since the pore size, or pore sizes, remain(s) constant in dimensions, the rate of emission of active composition from the hollow porous container is similarly constant. It is also possible to control the rate of emission by altering the geometry of the hollow porous container, including its length and diameter.
The hollow porous container for use in this invention may comprise any suitable non water-soluble porous material. Suitable porous materials for include porous plastics materials such as polypropylene, polyethylene.
The active composition may be a solid, liquid, gel, solution, dispersion or suspension.
The active compositions of this invention may be blended with e.g. polymers or any suitable thickening agent in order to increase their viscosity and permit them to be dispensed from the hollow porous container in a controlled manner. The dispensing device of this invention may be filled with the active composition using any appropriate method.
The dispensing device may be sealed using any suitable material and method, such as by a stopper or cork or by welding closed the open ends using any suitable material.
The dispensing device may be supported on a holder.
Advantages of the dispensing device of this invention include that it does not require a separate reservoir of active composition, in that the active composition is contained within the sealed hollow porous container, and it releases active composition in a uniform manner.
The dispensing device can be used for delivery of a variety of products into an environment, by such means as liquid and/or air flow. Typically, the product will include both surfactant and perfume components. The delivery is also suitable for delivering air freshener or insecticide. The rheological behaviour of the active composition can be selected with regard to the pore size of the porous layer, to ensure there is no leakage and that the active composition is drawn through the porous layer to provide a sufficient dose of active composition. Optimum flow-rate of the active composition through the porous layer may be established by one skilled in the art through the use of, for example, d'Arcy's Law. The flow rate is dependent on the size and number of pores and fluid viscosity.
This invention is particularly suitable for relatively viscous liquids, preferably having a viscosity greater than about 200mPas as measured in a Haake RS 1 viscosimeter at 60/1° geometry, a shear rate of lsec"1 at 20 0C. (Haake RSl is a Trade Mark.). The invention will be described in more detail, by way of illustration, with reference to the accompanying drawings, in which:
Figure.1 is a front elevation of one embodiment of a dispensing device in accordance with the present invention;
Figure 2 is a longitudinal sectional view of the device of Figure 1;
Figure 3 is a transverse sectional view of the device of Figure 1;
Figure 4 is a graph of weight loss (in grams) versus number of flushes, showing the results of in-use toilet tests of the device of Figures 1 to 3, •showing the correlation between weight loss and the number of flushes; and
Figure 5 is a graph of weight loss (in grams) versus time (in hours) showing results of tests using samples of thickened dihydromyrcenol acetate having different viscosities in devices as shown in Figures 1 to 3.
Detailed Description Referring to the drawings, Figures 1, 2 and 3 illustrate a circular section tubular container 1 of porous material, constituting a hollow porous container. The container is adapted for delivering an active composition 3, such as a cleansing and/or deodorising product, into, for example, the bowl of a water closet in conjunction with a flow of water when the water closet is flushed, or into any environment in conjunction with air flow in the surrounding atmosphere as, for example, with an air freshener. The interior of the hollow porous container 1 serves as a reservoir for the active composition 3. The active composition 3 is drawn through the pores of the container 1 under the influence of, for example, flushing water and/or air.
The device is shown as being closed by two screw threaded end caps 2, although use of one capped end or, when two or more hollow porous containers are used, more than two capped ends are instead possible. If desired, the capped ends 2 of the hollow porous container 1 can be transparent, so that the amount of active composition 2 remaining can be easily ascertained.
The active composition 3 may be coloured to make determination of level of active composition easier as it can be ascertained through the transparent capped ends and/or through emanation from the pores of the porous container 1.
Although not shown in the Figures, the device may also include a strap, or other hanger, by which it can be suspended within the environment where the active composition is to be delivered (in the case of a water closet bowl the device may be suspended in much the same way as a conventional "rim block").
The following examples illustrate but do not limit the invention. Unless otherwise indicated all parts are by weight and all temperatures are in 0C.
EXAMPLE 1
A dispensing device, as illustrated in Figure 1, was constructed with the following characteristics:
Material: XM0266 polyethylene (Supplied by Porex) Pore size 18 - 40 micron Length of container 1 : 6 cm Outer diameter: 2.47 cm Inner diameter: 1.67 cm Porous part diameter: 0.4 cm Intake rim liquid quantity: 14 grams
The following active composition was prepared: % w/w Demmeralised water 48.9 Natrosol 250 MR (Hercules) 0.9 Texapon NSO (Henkel) 25.0 Propylene Glycol 5.0 Synperonic A7 (Uniqema) 5.0 Eumulgin HRE40 (Henkel) 5.0 Lemon Fragrance 10.0 Bronidox L (Henkel) 0.1 Turpinal SL (Henkel) 0.1 Dye q.s.
XM0266, Natrosol 250 MR, Texapon NSO, Synperonic A7, Eumulgin HRE40, Bronidox L and Turpinal SL are all Trade Marks
The active composition had a viscosity of 3050mPas as measured using a Haake RSl viscosimeter at 60/1° geometry, a shear rate of lsec"1 at 20 0C.
The above-mentioned dispensing device was filled with 12 grams of the active composition and placed under the rim of a toilet bowl at room temperature. The dispensing device was then subjected to three consecutive flushes of water eight times per day.
The weight loss of active composition from the dispensing device was recorded after 48, 120, 144 and 192 flushes. Figure 4 shows the results of the weight loss of active composition from the dispensing device.
It is clear from this experiment that the dispensing device permits the active composition to be emitted in a uniform manner. EXAMPLE 2
Four dispensing devices, as illustrated in Figure 1, were constructed with the following characteristics:
Material: XM0266 polyethylene (Supplied by Porex) Pore size 18 - 40 micron Length of container 1 : 4 cm Outer diameter: 2.47 cm Inner diameter: 1.67 cm Porous part diameter: 0.4 cm Length of end cap 2, excluding threaded part: 1.07 cm Volume, including porous part: 14.5 cm3 Volume, excluding porous part: 4.07 cm3 Intake thickened fluid quantity: approx. 4 grams
Four samples of dihydro myrcenyl acetate (a volatile fragrance ingredient) were thickened using different amounts of Aqualon T200 (available from Hercules). (Aqualon T200 is a Trade Mark.) The viscosity of each of these four samples was measured, using a Haake RSl viscosimeter at 60/1° geometry, a shear rate of lsec"1 at 20 0C. The viscosities were as follows:
Viscosity (mPas) Sample 1 1130 Sample 2 2100 Sample 3 4000 Sample 4 6300
Four dispensing devices, constructed as described in this example, were each filled with one of the above four samples of thickened dihydro myrcenyl acetate. Each dispensing device was then stored at room temperature and the weight loss of thickened dihydro myrcenyl acetate from each dispensing device was recorded at periods of 28 hours, 50 hours and 93 hours from the start of storage. Figure 5 shows the results of the weight loss of dihydro myrcenyl acetate from each of the dispensing devices.
It is clear from this experiment that by selection of the viscosity of the active composition with regard to the pore size of the hollow porous container uniform emission of active composition can be obtained. In this experiment, where the hollow porous container has a pore size in the range 18-40 micron, uniform emission is obtained above 2000mPas. The sample having a viscosity of 1130mPas was seen to leak from the hollow porous container and showed a faster emission rate than the other three samples.

Claims

1. A dispensing device comprising at least one hollow porous container containing an active composition.
2. A device as claimed in claim 1 or 2, wherein the viscosity of the active composition is greater than 200mPas.
3. A device according to claim 1 or 2, for the delivery of an active composition into a receiver in conjunction with a liquid flow into said receiver.
4. A device according to claim 3, wherein said receiver is a toilet bowl.
5. A device according to any one of the preceding claims, for the delivery of an active composition into an environment in conjunction with airflow in said environment.
6. An active composition for use with a device according to the preceding claims, wherein such active composition has a viscosity greater than 200mPas.
PCT/IB2005/002280 2004-06-26 2005-06-24 Dispensing devices WO2006000917A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05766108A EP1761287A1 (en) 2004-06-26 2005-06-24 Dispensing devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0414370A GB0414370D0 (en) 2004-06-26 2004-06-26 Dispensing devices
GB0414370.7 2004-06-26

Publications (1)

Publication Number Publication Date
WO2006000917A1 true WO2006000917A1 (en) 2006-01-05

Family

ID=32800268

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/002280 WO2006000917A1 (en) 2004-06-26 2005-06-24 Dispensing devices

Country Status (3)

Country Link
EP (1) EP1761287A1 (en)
GB (1) GB0414370D0 (en)
WO (1) WO2006000917A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7721358B2 (en) 2007-09-11 2010-05-25 The Clorox Company Toilet device with improved fragrance delivery
US8266728B2 (en) 2007-08-21 2012-09-18 The Clorox Company Toilet device with cleanser and fragrance
US8307467B2 (en) 2007-08-23 2012-11-13 The Clorox Company Toilet device with indicator
JP6200111B1 (en) * 2017-03-17 2017-09-20 有限会社 ホテイ産業研究所 Toilet sanitizer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB279605A (en) * 1926-09-28 1927-11-03 Richard Hayton Speight Improved appliance for disinfecting and aromatizing the atmosphere in buildings, vessels and other structures
DE8415681U1 (en) * 1984-05-23 1985-06-05 Henkel KGaA, 4000 Düsseldorf Dosing device
US4605165A (en) * 1984-06-13 1986-08-12 International Flavors & Fragrances Inc. Constant rate volatile composition dispensing article and process for using same
EP0913533A1 (en) * 1997-10-31 1999-05-06 The Procter & Gamble Company Flexible film as a package for a toilet bowl dispenser
WO1999047182A1 (en) * 1998-03-19 1999-09-23 Unilever Plc Time release fragrance sachet, method of using same and method of fabricating same
WO2001002653A1 (en) * 1999-07-02 2001-01-11 Globol Chemicals (Uk) Limited A dispenser
DE10020090A1 (en) * 1999-07-10 2001-03-29 Henkel Kgaa Holding and dispensing device for holding and dispensing substance into lavatory bowl, has flexible spacer element placed between stirrup-like spring clip and substance container
US20040068781A1 (en) * 2000-12-15 2004-04-15 The Procter & Gamble Company Method of dispensing volatile and soluble substances and a device for use therein

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB279605A (en) * 1926-09-28 1927-11-03 Richard Hayton Speight Improved appliance for disinfecting and aromatizing the atmosphere in buildings, vessels and other structures
DE8415681U1 (en) * 1984-05-23 1985-06-05 Henkel KGaA, 4000 Düsseldorf Dosing device
US4605165A (en) * 1984-06-13 1986-08-12 International Flavors & Fragrances Inc. Constant rate volatile composition dispensing article and process for using same
EP0913533A1 (en) * 1997-10-31 1999-05-06 The Procter & Gamble Company Flexible film as a package for a toilet bowl dispenser
WO1999047182A1 (en) * 1998-03-19 1999-09-23 Unilever Plc Time release fragrance sachet, method of using same and method of fabricating same
WO2001002653A1 (en) * 1999-07-02 2001-01-11 Globol Chemicals (Uk) Limited A dispenser
DE10020090A1 (en) * 1999-07-10 2001-03-29 Henkel Kgaa Holding and dispensing device for holding and dispensing substance into lavatory bowl, has flexible spacer element placed between stirrup-like spring clip and substance container
US20040068781A1 (en) * 2000-12-15 2004-04-15 The Procter & Gamble Company Method of dispensing volatile and soluble substances and a device for use therein

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8266728B2 (en) 2007-08-21 2012-09-18 The Clorox Company Toilet device with cleanser and fragrance
US8307467B2 (en) 2007-08-23 2012-11-13 The Clorox Company Toilet device with indicator
US7721358B2 (en) 2007-09-11 2010-05-25 The Clorox Company Toilet device with improved fragrance delivery
JP6200111B1 (en) * 2017-03-17 2017-09-20 有限会社 ホテイ産業研究所 Toilet sanitizer

Also Published As

Publication number Publication date
EP1761287A1 (en) 2007-03-14
GB0414370D0 (en) 2004-07-28

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