AU660524B2 - Toilet deodoriser - Google Patents

Description

P100/011W99 AUSTALIARegulation 3.2 Patents Act 1990 66 0524

ORIGINAL

COMPLETE SPECIFICATION STANDARD PATENT Invention Title: oi following statement is a full description of this invention, including the best .method of performing it known to me:- P/00/011 28/5/91 Regulation 3.2

AUSTRALIA

Patents Act 1990

ORIGINAL

COMPLETE SPECIFICATION STANDARD PATENT Invention Title: Toilet Deodoriser The following statement is a full description of this invention, including the best method of performing 5 it known to me:- This invention relates to a toilet deodoriser which is generally in tablet or sachet form. The deodoriser is placed directly into the toilet bowl where it dissolves in water, liberates carbon dioxide and releases the deodorising agent into the water and surrounding air. Generally, the ingredients are biodegradable.

15 The toilet deodorisers currently used are frequently available in a spray-can type formulation. The spray-cans are undesirable for environmental reasons as they contain synthetic propellants.

20 Further, the spray-cans themselves are expensive to produce and difficult to dispose of. Also when placed in public toilets they are frequently stolen.

According to a first embodiment of this invention there is provided a toilet deodorant comprising a deodorising agent, a water soluble carbon dioxide liberating agent, a carbonate salt and/or bicarbonate salt which reacts with the carbon dioxide liberating agent in water to form carbon dioxide and releases the deodorising agent into the water and surrounding air.

Generally, the deodorant further coprises at least one water-soluble binding agent, filler and colouring agent. Generally, the toilet deodorant is in a solid, powder or slurry form.

This invention in a second broad form provides a method of deodorising a toilet wherein the deodorant of the first embodiment is placed in the water 0 15 of a toilet bowl whereby the carbon dioxide liberating agent reacts with the bicarbonate salt to release carbon dioxide and the deodorising agent into e the water and surrounding air.

This invention in a further broad form provides a method of preparing a deodoriser of the first broad form wherein the carbon dioxide liberating agent, bicarbonate salt and the 25 deodorising agent are mixed together, typically homogeneously mixed together, with optional water soluble binding ,agents, fillers and/or colouring 66 agents.

The deodoriser may be in the form of a tablet, in which case at least one water soluble binding agent is typically included. Alternatively the oe deodoriser may be in the form of a loose powder. Discrete dosage units of the powder may be packaged in sachet form.

Typically the stoichiometric ratio of carboxylic acid to bicarbonate may be from 1:3 to 3:1. Generally the ratio is from 1:2 to 2:1. Stoichiometrically equivalent amounts are preferred.

Typically the amount of deodorising agent in the deodorant tablet may be present in from 0.01 to 95%, preferably 0.5 to 10% by weight. The amount of deodorising agent in the sachet can be from 0.01 to 25%, preferable 0.5 to by weight.

When the deodorant is in tablet form, the binding agent may be present in an amount of 0.1 to 90% by weight, preferably .01 to 30% by weight of the tablet.

The amount of other additives such as 15 colouring agents, fillers or stabilisers may be present from 0.01 to 90% by weight of the tablet and from 0.01 to 90% by weight of the sachet contents.

Typically, the water soluble carbon dioxide liberating agent is a naturally occurring carboxylic acid.

Illustrative of naturally occurring carboxylic acids include glycolic acid, tartaric acid, citric acid, grape acid, pyruvic acid or malic acid or half salts thereof. Particularly preferred is citric acid or tartaric acid or half •salts thereof.

The bicarbonate salts include bicarbonate salts of sodium, potassium, or ammonium. The carbonate salts include carbonate salts of magnesium, calcium, sodium, potassium or ammonium.

Sodium bicarbonate is preferred.

Deodorising agents can be naturally occurring oils such as Oil of Angelica, Oil of Anise, Oil of Balm, Oil of Basil, Oil of Bergamot, Oil of Bitter Orange, Oil of Camphor, Oil of Cedar Wood, Oil of Chamomile, Oil of Champaca, Oil of Cinnamon, Oil of Citronella, Oil of Cypress, Olive Oil, Arachis Oils, Oil of Geranium, Oil of Juniper, Oil of Lavender, Oil of Lemon, Oil of Lemon Grass, Oil of Marjoram, Oil of Orange Flowers, Oil of Origanum, Oil of Pettigrain, Oil of Rose, Oil of Sweet Almond, Oil of Vetiver, or mixtures thereof, or any manufactured or synthetic fragrances or any mixture thereof.

Generally, the naturally occurring oils may also exhibit antiseptic as well as 15 deodorising properties. Such oils include Oil of Cubeb, Oil of Santal or Eucalyptus Oil. Eucalyptus oil is o. particularly preferred.

Illustrative of water soluble binding 20 agents are the water soluble gums which include guar gum, xanthan gum, gum Arabic, gelatin, alginates, agar, tragacanth, karaya, chondrus or mixtures thereof. Water soluble polymeric binding agents may also be used and include poly(vinyl alcohol), poly(acrylic acid), poly(vinyl pyi:rolidone), poly(acrylam 4 de), poly(vinyl methyl ether), polyethylene 30 oxide; starch derivatives such as starch acetate, hydroxyethyl starch ethers, hydroxypropyl starch and also cellulose derivatives such as methylcellulose, sodium carboxymethyl 35 cellulose, or a hydroxy lower alkyl cellulose such as hydroxyethyl cellulose, hydroxypropyl cellulose and the like.

Fillers and inert dilutents which may be used include lactose and sodium phosphate.

Free flowing agents such as silicon dioxide may be used.

By way of example only, one embodiment of a toilet deodoriser in accordance with this invention is described.

The best mode for carrying out the invention is homogeneously mixing tartaric acid (2g) and sodium bicarbonate (4g) to form a homogeneous dry mixture. Starch at 0.1 2 wt%.

Free flowing agents/fillers at 0.1 1 wt% and 0.1 to 20 wt% of any of the above listed oils or mixtures thereof are mixed homogeneously into the dry mixture which is then pressed to form 15 a tablet. The tablet is then placed into water in a toilet bowl where the sodium bicarbonate reacts with the 'tartaric acid to form carbon dioxide g which effervesces releasing the decdoriser into the water and surrounding atmosphere.

Claims (14)

1. A solid toilet deodoriser comprising a deodorising agent, a water soluble carbon dioxide liberating agent, a carbonate salt and/or bicarbonate salt which reacts with the carbon dioxide liberating agent in water to form carbon dioxide thereby releasing the deodorising agent into the water and surrounding air.

2. A toilet deodoriser in accordance with claim 1 hereof formed into a tablet by means of one or more water soluble binding agents.

3. A toilet deodoriser tablet in accordance with claim 2 hereof 9 wherein the binder is starch.

4. A toilet deodoriser in accordance with claim 1 hereof being in powder form. .*oo: S•

5. A toilet deodoriser in accordance with any one of the preceding claims wherein the soluble carbon dioxide liberating agent is a naturally occurring carboxylic acid.

6. A toilet deodoriser in accordance with claim 5 hereof wherein the naturally occurring carboxylic acid is chosen from a group comprising glycolic acid, tartaric acid, citric 7 acid, grape acid, pyruvic acid or malic acid or half salts thereof.

7. A toilet deodoriser in accordance with any one of the preceding claims including a bicarbonate salt of sodium, potassium or ammonium.

8. A toilet deodoriser in accordance with any one of claims 1-6 hereof including a carbonate salt of magnesium, calcium, sodium, potassium or ammonium.

9. A toilet deodoriser in accordance with any one of the :preceding claims wherein the water soluble carbon dioxide liberating agent and carbonate/bicarbonate salt are present in substantially stoichiometric amounts.

10. A toilet deodoriser in accordance with any one of the preceding claims wherein the deodorising agent is comprised of one or more naturally occurring oils.

11. A toilet deodoriser in accordance with claim 10 hereof wherein the oil or oils are selected from a group comprising Oil of Angelica, Oil of Anise, Oil of Balm, Oil of Basil, Oil of Bergamot, Oil of Bitter Orange, Oil of Camphor, Oil of Cedar Wood, Oil of Chamomile, Oil of Champaca, Oil of Cinnamon, Oil of Citronella, Oil of Cypress, Olive Oil, Arachis Oils, Oil of Geranium, Oil of 8 Juniper, Oil of Lavender, Oil of Lemon, Oil of Lemon Grass, Oil of Marjoram, Oil of Orange Flowers, Oil of Origanum, Oil of Pettigrain, Oil of Rose, Oil of Sweet Almond, Oil of Vetiver, Oil of Cubeb, Oil of Santal and Eucalyptus Oil.

12. A toilet deodoriser in accordance with any one of the preceding claims wherein the deodorising agent comprises point five to ten percent by weight of the product.

13. A toilet deodoriser in accordance with any one of the preceding claims wherein lactose and/or sodium phosphate are included as fillers. *oo• 0

14. A toilet deodoriser in accordance with claim 4 hereof wherein silicon dioxide is utilised as a free flowing *Vt agent. DATED this 23rd day of November, 1994 KENNETH JAMES LISSON t by his Patent Attorneys Barker, Blenkinship Associates ap'. f i It 0 p ,4/P rZ ~e errA- 1 7-A 4, tcb~7 14~ -04 Pc e40L:r ,71