Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1995-05-10
1996-12-31
Harriman, Erin M.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510423, 510424, 510537, C11D 112, C11D 172, C11D 190, C11D 194
Patent
active
055894470
DESCRIPTION:
BRIEF SUMMARY
The preset invention is directed to liquid dishwashing-detergent compositions, more particularly compositions containing an anionic surfactant and a combination of amphoteric surface-active compounds and a non-ionic surfactant.
The liquid dishwashing detergents most common on the market today are primarily intended for washing by hand and as a rule consist of aqueous solutions containing anionic surfactants, such as alkyl sulphonates, alkylbenzene sulphonates, alkyl sulphates and alkyl ether sulphates, as an essential ingredient.
Thus the article J Palicka 2nd World Surfactants Congress 1988, May 1988, CESIO and ASPA, Paris, Volume III on page 474, table 8 and WO 92/05236, in the Example disclose a dishwashing composition comprising a combination of two amphoteric compounds, an anionic surfactant and as a foam stabiliser and foam booster and a cocodiethanol amide or an amine oxide. Further in the article J Palicka, 3rd CESIO International Surfactant Congress and Exhibition, June 1992 CESIO, London, section D, page 311, a dishwashing composition is disclosed containing a combination of three amphoteric and zwitterionic compounds and an anionic surfactant.
Amine oxides or alkyl diethanolamides are generally used as foam stabilisers. Both compounds give a high and lasting foam, but are disadvantageous in terms of toxicity, involving the risk of nitroseamine formation at an unacceptable level. Thus, there is a need for a dishwashing detergent having a good cleaning capacity and good foam formation without involving any risk of nitroseamine formation.
According to the present invention, it has been found that dishwashing detergents of good cleaning capacity and excellent foam formation can be obtained by using a combination of different types of amphoteric surface-active compounds and certain non-ionic surface-active compounds in dishwashing detergents based on anionic surfactants. The inventive dishwashing-detergent compositions are especially suitable, by their milldness, for washing by hand e.g. glass, china, and kitchen utensils. The inventive dishwashing-detergent compositions not only have the advantage of showing good foaming properties, i.e. high and lasting foam, but also are advantageous in that they can be produced in high-concentration form and are very kind to the skin.
Thus, the present invention relates to a dishwashing-detergent composition as defined in the appended claims.
In the dishwashing-detergent compositions according to the invention, use is made of a combination of at least two, preferably three, types of amphoteric compounds, hereinafter referred to as type a), type b) and type c). The amphoteric surface-active compounds of type a) are characterised by the general formula (I) ##STR3## wherein R is a hydrocarbon group having 7-22 carbon atoms, n is 0 or 1, A is a carbonyl group [C(O)], a group (OCH.sub.2 CH.sub.2).sub.z or a group (OCH.sub.2 CH.sub.2 CH.sub.2).sub.z in which z is an integer from 1 to 5, R.sub.1 is hydrogen or a lower alkyl group, x is 2 or 3, y is an integer from 0 to 4, Q is the group --R.sub.2 COOM in which R.sub.2 is an alkylene group having 1-6 carbon atoms and M is hydrogen or an ion from the groups alkali metals, alkaline-earth metals, ammonium and substituted ammonium, and B is hydrogen or a group Q as defined above.
Amphoteric compounds of this type are previously known and are used in cleaning and shampoo compositions. Such compounds are described e.g. in EP Patent Applications 160 507, 162 600 and 214 868.
In the amphoteric surface-active compounds of type a) utilised in the inventive dishwashing-detergent compositions, R is a hydrocarbon group having 7-22 carbon atoms, suitably 11-22 carbon atoms.. The hydrocarbon group R can be straight or branched, saturated or unsaturated and may optionally contains substituents, such as hydroxyl groups. The group R may also be a cycloalkyl-alkyl group, an aralalkyl group or an aralkenyl group in which the alkyl or alkenyl group contains at least 6 carbon atoms. Preferably, R is an alkyl or alkenyl group, and it is especi
REFERENCES:
patent: 5340502 (1994-08-01), Palicka
J. Palicka "2nd World Surfactants Congress 1988, Proceedings", May 1988, vol. III, pp. 449-475.
J, Palicka "3rd CESIO International Surfactant Congress 1992, Proceedings", Jun. 1992, CESIO, Sec D, pp. 300-318.
Berol Nobel AB
Harriman Erin M.
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