Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate
2001-12-03
2003-12-09
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
C510S321000, C510S337000, C510S303000, C510S309000, C510S310000, C510S311000, C510S312000, C510S504000, C510S338000, C510S393000
Reexamination Certificate
active
06660711
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to laundry detergent compositions which provide enhanced hydrophilic soil, inter alia, clay, removal benefits. The laundry detergent compositions of the present invention combine zwitterionic polyamines and a surfactant system which comprises mid-chain branched surfactants inter alia mid-chain branched alkyl sulphonates. The present invention further relates to methods for cleaning fabric having heavy clay soil deposits.
BACKGROUND OF THE INVENTION
Fabric, especially clothing, can become soiled with a variety of foreign substances ranging from hydrophobic stains (grease, oil) to hydrophilic stains (clay). The level of cleaning which is necessary to remove said foreign substances depends to a large degree upon the amount of stain present and the degree to which the foreign substance has contacted the fabric fibers. Grass stains usually involve direct abrasive contact with vegetative matter thereby producing highly penetrating stains. Clay soil stains, although in some instances contacting the fabric fibers with less force, nevertheless provide a different type of soil removal problem du to the high degree of charge associated with the clay itself. This high surface charge density may act to repel some laundryadjunct ingredients, inter alia, clay dispersants, thereby resisting any appreciable solublizing of the clay into the laundry liquor.
A surfactant per se is not all that is necessary to remove unwanted clay soils and stains. In fact, not all surfactants work equally well on all types of stains. In addition to surfactants, polyamine hydrophilic soil dispersants are added to laundry detergent compositions to “carry away” clay soils from the fabric surface and to remove the possibility that the clay soil will be re-deposited upon the fabric. However, unless the clay can be initially solublized away from the fabric fiber, especially in the case of hydrophilic fibers, inter alia, cotton, there will be nothing in solution for the dispersants to chelate.
There is a long felt need in the art for laundry detergent compositions which can effectively solublize embedded clay and other hydrophilic soils from fabric. There has further been a long felt need for a method for cleaning hydrophilic soils from fabric wherein the hydrophilic soils are effectively solublized into the laundry liquor.
SUMMARY OF THE INVENTION
The present invention meets the aforementioned needs in that it has been surprisingly discovered that certain zwitterionic polyamines in combination with a surfactant system comprising one or more mid-chain branched surfactants provides enhance removal of clay and other hydrophilic soils from fabric.
The first aspect of the present invention relates to a laundry detergent composition comprising:
a) from about 0.01%, preferably from about 0.1%, more preferably from 1%, most preferably from 3% to about 20%, preferably to about 10%, more preferably to about 5% by weight, of a zwitterionic polymer which comprises a polyamine backbone wherein one or more of said polyamine backbone amino units are quaternized and wherein said polyamine backbone is substituted by one or more units capable of having an anionic charge such that the number of anionic units present in said zwitterionic polymer exceeds the number of backbone quaternized units;
b) from about 0.01%, preferably from about 0.1%, more preferably from about 1% to about 100%, preferably to about 80% by weight, preferably to about 60%, most preferably to about 30% by weight, of a surfactant system comprising one or more mid-chain branched surfactants selected from the group consisting of mid-chain branched alkyl sulfates, mid-chain branched alkoxy sulfates, mid-chain branched aryl sulphonates, and mixtures thereof; and
c) the balance carriers and adjunct ingredients.
The present invention further relates to granular laundry detergent compositions which comprise a surfactant system wherein said surfactant system comprises from about 0.01%, preferably from about 0.1% more preferably from about 1% to about 100%, preferably to about 80% by weight, preferably to about 60%, most preferably to about 30% by weight, of a surfactant which is not a mid-chain branched surfactant, said surfactant selected from the group consisting of anionic, cationic, zwitterionic, nonionic, ampholytic surfactants, and mixtures thereof.
The present invention also relates to laundry detergent compositions which comprise zwitterionic polyamines having a hydrophilic backbone and an anionic tether which when taken together comprises a net anionic charge of at least 1, preferably at least 2, more preferably at least 3.
Another aspect of the present invention relates to a granular laundry detergent composition comprising:
a) from about 0.01%, preferably from about 0.1%, more preferably from 1%, most preferably from 3% to about 20%, preferably to about 10%, more preferably to about 5% by weight, of a zwitterionic polymer which comprises a polyamine backbone, said backbone comprising two or more amino units wherein at least one of said amino units is quaternized and wherein at least one amino unit is substituted by one or more moieties capable of having an anionic charge wherein further the number of amino unit substitutions which comprise an anionic moiety is less than or equal to the number of quaternized backbone amino units;
b) from about 0.01%, preferably from about 0.1% more preferably from about 1% to about 100%, preferably to about 80% by weight, preferably to about 60%, most preferably to about 30% by weight, of a surfactant system comprising one or more mid-chain branched surfactants selected from the group consisting of mid-chain branched alkyl sulfates, mid-chain branched alkoxy sulfates, mid-chain branched aryl sulphonates, and mixtures thereof; and
c) the balance carriers and adjunct ingredients.
A further aspect of the present invention relates to nil bleach compositions which comprise:
a) from about 0.01%, preferably from about 0.1%, more preferably from 1%, most preferably from 3% to about 20%, preferably to about 10%, more preferably to about 5% by weight, of a zwitterionic polyamine according to the present invention;
b) from about 0.01%, preferably from about 0.1% more preferably from about 1% to about 100%, preferably to about 80% by weight, preferably to about 60%, most preferably to about 30% by weight, of a surfactant system comprising:
i) from 0% to 80% by weight, of a mid-chain branched alkyl sulfate surfactant, a mid-chain branched alkyl alkoxy sulfate surfactant, and mixtures thereof;
ii) from 0% to 80% by weight, of a mid-chain branched aryl sulfonate surfactant;
iii) optionally from 0.01% by weight, of a surfactant selected from the group consisting of anionic, nonionic, cationic, zwitterionic, ampholytic surfactants, and mixtures thereof;
c) from about 0.001% by weight, of a detersive enzyme, said enzyme selected from the group consisting of protease, amylases, lipases, cellulases, peroxidases, hydrolases, cutinases, mannanases, xyloglucanases, and mixtures thereof; and
d) the balance carriers and adjunct ingredients.
A yet further aspect of the present invention relates to nil bleach compositions which comprise:
a) from about 0.01%, preferably from about 0.1%, more preferably from 1%, most preferably from 3% to about 20%, preferably to about 10%, more preferably to about 5% by weight, of a zwitterionic polyamine according to the present invention;
b) from about 0.01%, preferably from about 0.1% more preferably from about 1% to about 100%, preferably to about 80% by weight, preferably to about 60%, most preferably to about 30% by weight, of a surfactant system comprising:
i) from 0% to 80% by weight, of a mid-chain branched alkyl sulfate surfactant, a mid-chain branched alkyl alkoxy sulfate surfactant, and mixtures thereof;
ii) from 0% to 80% by weight, of a mid-chain branched aryl sulfonate surfactant;
iii) optionally from 0.01% by weight, of a surfactant selected from the group consisting of anionic, nonionic, cationic, zwitterionic, ampholytic surfactants, and mixtures thereof;
Gosselink Eugene Paul
Price Kenneth Nathan
Delcotto Gregory
Miller Steven W.
Zerby Kim W.
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