WO1996023050A1

WO1996023050A1 - Cleansing compositions

Info

Publication number: WO1996023050A1
Application number: PCT/GB1996/000144
Authority: WO
Inventors: Norman Anthony Slater; Fiona Elizabeth Cumming
Original assignee: Jeyes Group Plc
Priority date: 1995-01-24
Filing date: 1996-01-24
Publication date: 1996-08-01
Also published as: AU4455996A; GB9501285D0

Abstract

A method of cleaning and sanitising a hard surface which comprises contacting the surface with an aqueous composition comprising: (i) an alkaline builder; (ii) an amphoteric or quaternary biocide; (iii) one or more detergent surface active agents; (iv) optionally a chelating agent; and (v) water.

Description

CLEANSING COMPOSITIONS

This invention is concerned with improvements in and relating to cleansing compositions and, more

particularly, is concerned with cleansing compositions having both a cleansing or degreasing and sanitising effect.

Many cleaning operations include both a cleaning operation, especially a degreasing operation to remove fatty or oily residues, and a sanitising operation.

Thus, the cleaning of food preparation surfaces, in the home or industrially, will involve such operations.

Also such are involved in the cleaning of toilets and bathroom facilities such as sinks, washbasins, toilets, baths or the like. In the cleansing of food

manufacturing or processing equipment, hereinafter simply referred to as "food machinery", it is commonly necessary to both clean and sanitise the machinery for obvious reasons of hygiene. Such machinery is commonly made of stainless steel although other constructional materials may be employed such as aluminium, plastics and other metallic systems. Food processing often leaves greasy or fatty residues upon the machinery and, accordingly, in any cleansing operation, it is necessary to thoroughly degrease the material as part of the cleansing operation. To date, it has been the practice to carry out the degreasing and sanitizing of food machinery in two stages, namely a degreasing/cleansing stage and a santizing stage.

It has now been found, in accordance with the present invention, that solid surfaces, especially grease-soiled surfaces, such as food machinery or surfaces in general with food residues/contamination, may be cleaned in a single degreasing/sanitizing step using a degreasing/sanitizing composition as more particularly defined below.

Accordingly, the present invention provides, in accordance with one embodiment thereof, a method of cleaning and sanitising a hard surface which comprises contacting the surface, in a single stage, with an aqueous composition comprising:

(i) an alkaline builder;

(ii) an amphoteric or quaternary biocide;

(iii) one or more detergent surface active agents;

(iv) optionally, one or more chelating agents; and

(v) water.

The invention also provides, in accordance with a further embodiment thereof, an aqueous detergent/ sanitiser composition comprising components (i)-(v) as listed above. The alkaline builder component (i) is preferably sodium metasilicate and/or as sodium hydroxide.

Other binders may be employed and examples of such other builders include polyphosphates such as sodium

tripolyphosphate and tetrapotassium pyrophosphate, carbonates and zeolites; and organic builders such as alkali metal, e.g. sodium, gluconates, glycolates or citrates.

A variety of amphoteric biocides may be employed and exmaples of these are glycine or other

aminocarboxylic acid derivatives such as

dodecyldi(aminoethyl)glycine, laurylpropylenediaminoacetic acid, coco- alkyldimethylbetaine,

N-[dodecylamino)propyl]glycerine (sold under the Trade Name "Sandoteric ABD"), and the sodium salts of the reaction products of C₈-C₂₂

alkyltrimethylenediamines with sodium chloroacetate.

Similarly, a wide variety of quaternary biocides may be employed as biocide component (ii) and,

preferably, they are of a generally surface active nature. Examples of suitable quaternary compounds include cetyltrimethylammonium bromide,

cetyltrimethylammonium chloride, benzalkonium chloride, acetalkonium chloride, cetylpyridinium chloride,

benzyldimethyllaurylammonium chloride,

tetradecyldimethylbenzylammonium chloride,

tetradecyltrimethylammonium bromide, dodecyltrimethylammonium bromide, dequalinium bromide, dimethylethylbenzylammonium chloride,

dioctyldimethylammonium chloride,

didecyldimethylammonium bromide, benzalkonium chloride, dodecylpyridinium sulphate, doecyltrimethylbenzylammonium chloride, benzoxonium chloride, and methylbenzethonium chloride.

At least one of the detergent surfactants (iii) is preferably a nonionic surfactant, especially an

ethoxylated alcohol type surfactant, e.g. one containing from 12 to 14 carbon atoms in the fatty alcohol and having an average of from 6 to 7 ethyleneoxy units per molecule. A suitable example of such a surfactant is the product sold under the Trade Name "Sandozin NRW".

Another preferred form of detergent surfactant (iii) is a betaine surfactant which is preferably used in combination with a nonionic detergent surfactant and which may be any of a wide variety of betaine

surfactants. A particularly useful example is that sold under the Trade name "Sandoteric SC", that is coco-amido propylhydroxy-sultaine.

The chelating agent components of the composition of the invention may comprising any of a variety of chelating agents. Suitable such agents include

phosphonates and carboxylates such as EDTA (ethylene diamine-tetra-acetic acid) and NTA nitrilo-triacetic acid, or, more usually, water-soluble salts thereof. In accordance with a preferred feature of the invention the chelating agent component comprises a mixture of both ETDA and NTA.

Compositions in accordance with the invention are suitably comprised of the various components thereof in the amounts noted in the following Table.

The compositions in accordance with the invention are simply prepared by mixing the ingredients, most conveniently by adding the ingredients stepwise to the water component. The composition in accordance with the invention can be applied undiluted but is suitably applied in

relatively dilute form (e.g. at a dilution of from 1 in 5 to 1 in 20) and, preferably as a foam or spray, e.g. by the use of a "Jetstream" Foaming Unit (Spray Systems UK Ltd) or a manual trigger spray of the type used in household spray compositions. Since the composition is used in a single cleaning/sanitising operation, use thereof allows for a substantial reduction in cleaning time and labour and reduction in water usage and

effluent since fewer dilution and rinse-off stages are required.

In order that the invention may be well understood the following examples are given by way of illustration only. In the examples all parts and percentages are by weight unless otherwise stated.

Examples

Claims

CLAIMS :

1. A method of cleaning and sanitising a hard surface which comprises contacting the surface with an aqueous composition comprising:

(i) an alkaline builder;

(ii) an amphoteric or quaternary biocide;

(iii) one or more detergent surface active agents;

(iv) optionally a chelating agent; and

(v) water.

2. A degreasing/sanitising composition comprising components (i)-(v) as set forth in claim 1.

3. A method as claimed in claim 1 in which the surface is a surface which has come into contact with food during the preparation or processing thereof.

4. A method as claimed in claim 2 in which the surface comprises food machinery.

AMENDED CLAIMS

[received by the International Bureau

on 11 July 1996 (11.07.96);

original claim 1 amended; remaining claims

unchanged (1 page)]

(i) an alkaline builder;

(ii) an amphoteric biocide;

(iii) one or more detergent surface active agents;

(iv) a chelating agent; and

(v) water.

2. A degreasing/βanitising composition comprising components (i)-(v) as set forth in claim 1.

3. A method as claimed m claim 1 in which the surface is a βurface which has come into contact with food during the preparation or processing thereof.