Liquid hard surface cleaning compositions

Details Liquid hard surface cleaning compositions Liquid hard surface cleaning compositions

2000-08-24

2002-03-19

Hardee, John (Department: 1751)

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

Specific organic component

C510S506000

Reexamination Certificate

active

06358912

ABSTRACT:

TECHNICAL FIELD
The present invention relates to liquid hard-surface cleaning compositions delivering improved cleaning performance, especially on greasy stains, this both when used in neat or in diluted conditions.
BACKGROUND OF THE INVENTION
Liquid compositions particularly suitable for cleaning hard-surfaces have been disclosed in the art. Much of the focus for such compositions has been on providing outstanding cleaning on a variety of surfaces and soils. However, such compositions are not fully satisfactory from a consumer viewpoint, especially regarding the soil release properties imparted to the hard-surfaces treated therewith.
The object of the present invention is to formulate a liquid hard-surface cleaning composition delivering improved cleaning performance on soiled hard-surfaces, especially greasy soiled surfaces.
It has now been found that this object is meet by providing a liquid composition comprising a particular antiresoiling ingredient, namely a polyalkoxylene glycol diester as defined herein, and a particular surfactant, namely an amphoteric surfactant as defined herein. Indeed, the compositions of the present invention allow improved cleaning performance, this both when used in neat or in diluted condition as compared to the same composition comprising only one of these two essential ingredients.
Advantageously, the compositions herein may be used to clean hard surfaces made of a variety of materials like glazed and non-glazed ceramic tiles, vinyl, no-wax vinyl, linoleum, melamine, glass, plastics, plastified wood, both in neat and diluted conditions, e.g., up to a dilution level of 1:400 (composition:water).
A further advantage of the present invention is that excellent cleaning performance is obtained with the compositions according to the present invention on various types of stains/soils including typical greasy stains like kitchen grease but also on other tough stains such as burnt/sticky food residues typically found in kitchens, this both when used in a first time cleaning operation and in a next time (subsequent) cleaning operation.
Another advantage associated to the compositions according to the present invention comprising the polyalkoxylene glycol diester and the amphoteric surfactant, is that they have the ability to provide good shine to the surface they have cleaned. Indeed, less formation of watermarks and/or even limescale deposits are observed on a surface having been cleaned with the compositions of the present invention and later comes in contact with water, for example, during a rinse operation. Advantageously, the shine benefit delivered to the surface even persists after several cycles of rinsing, thus providing long lasting protection against formation of watermarks and/or even limescale deposits on the surface, and hence long lasting shiny surfaces.
Yet another advantage of the present invention is that the presence of the polyalkoxylene glycol diester provides the required viscosity, allowing thereby the compositions herein to be used on vertical surfaces in an efficient way, without the need of adding any other thickening ingredient. Indeed the present invention provides a hard-surface cleaning composition being suitable for use on any hard-surface including vertical surfaces in a cost effective manner.
In a preferred embodiment herein the compositions of the present invention further comprise another antiresoiling ingredient, preferably a vinylpyrrolidone homopolymer or copolymer. It has surprisingly been found that the use of such a polyalkoxylene glycol diester, as defined herein, together with a vinylpyrrolidone homopolymer or copolymer, in a liquid hard-surface cleaning composition comprising the amphoteric surfactant as defined herein, allows for further easier hard-surface cleaning in the next time (subsequent) cleaning. More particularly, it has been found that the use of such a polyalkoxylene glycol diester, as defined herein, together with a vinylpyrrolidone homopolymer or copolymer, especially a quaternized or unquaternized vinylpyrrolidone/dialkylaminoalkyl acrylate or methacrylate copolymer, results in a synergistic effect on next-time cleaning performance.
SUMMARY OF THE INVENTION
The present invention encompasses a liquid hard-surface cleaning composition comprising a polyalkoxylene glycol diester according to the formula:
wherein the substituents R
1
and R
2
each independently are substituted or unsubstituted, saturated or unsaturated, linear or branched hydrocarbon chains having from 1 to 36 carbon atoms and wherein n is an integer from 10 to 400, and an amphoteric surfactant according to the formula:
R
a
R
b
R
c
N or R
a
R
b
R
c
N
+
X
wherein the substituent R
a
is a substituted or unsubstituted, saturated or unsaturated, linear or branched hydrocarbon chain having from 6 to 22 carbon atoms, wherein the substitutents R
b
and R
c
each independently are a C1 to C6 alkyl carboxylic acid group, which may be the same or different, and wherein X is hydrogen.
The present invention also encompasses a process of cleaning hard-surfaces wherein a liquid composition as defined herein above, is contacted with said surfaces.
DETAILED DESCRIPTION OF THE INVENTION
The liquid compositions
As a first essential ingredient, the compositions according to the present invention comprise a polyalkoxylene glycol diester or a mixture thereof, as defined herein after.
Typically, the compositions of the present invention comprise from 0.001% to 20% by weight of the total composition of said polyalkoxylene glycol diester or a mixture thereof, preferably from 0.01% to 10%, more preferably from 0.1% to 5% and most preferably from 0.2% to 2%.
Suitable polyalkoxylene glycol diesters for use herein have the following formula:
In this formula the substituents R
1
and R
2
each independently are substituted or unsubstituted, saturated or unsaturated, linear or branched hydrocarbon chains having from 1 to 36 carbon atoms, and n is an integer of from 10 to 400.
Preferably R
1
and R
2
each independently are substituted or unsubstituted, linear or branched alkyl groups or alkenyl groups having from 1 to 36 carbon atoms, preferably from 1 to 30, more preferably from 1 to 24, even more preferably from 1 to 22 and most preferably from 1 to 18, or aryl groups having up to 36 carbon atoms, preferably from 6 to 36, more preferably from 6 to 30. Preferably n is an integer from 20 to 400, more preferably from 40 to 300, even more preferably from 40 to 200 and most preferably from 40 to 150.
The preferred polyalkoxylene glycol diesters for use according to the present invention have a molecular weight of at least 200, more preferably from 400 to 10,000 and most preferably from 800 to 6,000.
Suitable polyalkoxylene glycol diesters for use herein include O′O-distearyl polyethylene glycol diester (MW 6000) or O′O-dioleyl polyethylene glycol diester (MW 560).
Such polyalkoxylene glycol diesters may be commercially available from Akzo Nobel under the name KESSCO PEG 6000DS®, or from Lonza under the name Pegosperse® or from Huls under the name Marlosol FS®.
As a second essential ingredient, the compositions according to the present invention comprise an amphoteric surfactant or a mixture thereof, as defined herein after.
Suitable amphoteric surfactants for use herein are according to the formula:
R
a
R
b
R
c
N or R
a
R
b
R
c
N
+
X
wherein the substituent R
a
is a substituted or unsubtituted, saturated or unsaturated, linear or branched hydrocarbon chain having from 6 to 22 carbon atoms, wherein the substitutents R
b
and R
c
each independently are a C1 to C6 alkyl carboxylic acid group, which may be the same or different, and wherein X is hydrogen.
Preferably the substitutent R
a
is a substituted or unsubtituted, saturated or unsaturated, linear or branched alkyl group, alkenyl group, or alkyl-aryl group containing from 6 to 22 carbon atoms, more preferably from 8 to 20 carbon atoms and most preferably from 10 to 18 carbon atoms.
Preferably the substitutents R
b
and R
c
each independently are a C1 to C4 alkyl carboxylic acid gro

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