Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
2003-04-04
2004-06-08
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S235000, C510S238000, C510S356000, C510S357000, C510S421000, C510S422000, C510S426000, C510S427000
Reexamination Certificate
active
06746999
ABSTRACT:
FIELD OF INVENTION
This invention relates to a light duty liquid cleaning composition which imparts mildness to the skin which can be in the form of a microemulsion designed in particular for cleaning hard surfaces and which is effective in removing particular and grease soil in leaving unrinsed surfaces with a shiny appearance.
BACKGROUND OF THE INVENTION
In recent years all-purpose light duty liquid detergents have become widely accepted for cleaning hard surfaces, e.g., dishes, glasses, sinks, painted woodwork and panels, tiled walls, wash bowls, washable wall paper, etc. Such all-purpose liquids comprise clear and opaque aqueous mixtures of water-soluble organic detergents and water-soluble detergent builder salts.
The present invention relates to light duty liquid detergent compositions with high foaming properties, which contain a sulfonate surfactant.
The prior art is replete with light duty liquid detergent compositions containing nonionic surfactants in combination with anionic and/or betaine surfactants wherein the nonionic detergent is not the major active surfactant, as shown in U.S. Pat. No. 3,658,985 wherein an anionic based shampoo contains a minor amount of a fatty acid alkanolamide. U.S. Pat. No. 3,769,398 discloses a betaine-based shampoo containing minor amounts of nonionic surfactants. This patent states that the low foaming properties of nonionic detergents renders its use in shampoo compositions non-preferred. U.S. Pat. No. 4,329,335 also discloses a shampoo containing a betaine surfactant as the major ingredient and minor amounts of a nonionic surfactant and of a fatty acid mono- or di-ethanolamide. U.S. Pat. No. 4,259,204 discloses a shampoo comprising 0.8-20% by weight of an anionic phosphoric acid ester and one additional surfactant which may be either anionic, amphoteric, or nonionic. U.S. Pat. No. 4,329,334 discloses an anionic-amphoteric based shampoo containing a major amount of anionic surfactant and lesser amounts of a betaine and nonionic surfactants.
U.S. Pat. No. 3,935,129 discloses a liquid cleaning composition based on the alkali metal silicate content and containing five basic ingredients, namely, urea, glycerin, triethanolamine, an anionic detergent and a nonionic detergent. The silicate content determines the amount of anionic and/or nonionic detergent in the liquid cleaning composition. However, the foaming property of these detergent compositions is not discussed therein.
U.S. Pat. No. 4,129,515 discloses a heavy duty liquid detergent for laundering fabrics comprising a mixture of substantially equal amounts of anionic and nonionic surfactants, alkanolamines and magnesium salts, and, optionally, zwitterionic surfactants as suds modifiers.
U.S. Pat. No. 4,224,195 discloses an aqueous detergent composition for laundering socks or stockings comprising a specific group of nonionic detergents, namely, an ethylene oxide of a secondary alcohol, a specific group of anionic detergents, namely, a sulfuric ester salt of an ethylene oxide adduct of a secondary alcohol, and an amphoteric surfactant which may be a betaine, wherein either the anionic or nonionic surfactant may be the major ingredient.
SUMMARY OF THE INVENTION
It has now been found that a light duty liquid detergent can be formulated with an anionic surfactant which has desirable cleaning properties and mildness to the human skin.
An object of this invention is to provide a light duty liquid detergent composition which can be in the form of a microemulsion, and comprises a mixture of anionic surfactants, wherein the composition does not contain any N-alkyl alkanolamide, zwitterionic surfactant, silicas, abrasives, alkali metal carbonates, alkaline earth metal carbonates, alkyl glycine surfactant or a cyclic imidinium surfactant or more than 0.05 wt. % of a hydroxy aliphatic acid.
Another object of this invention is to provide a light duty liquid detergent with desirable high foaming and cleaning properties.
Additional objects, advantages and novel features of the invention will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following or may be learned by practice of the invention. The objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
DETAILED DESCRIPTION OF THE INVENTION
The clear microemulsion or nonmicroemulsion light duty liquid compositions of the instant invention comprises approximately by weight:
(a) 10% to 45% of a mixture of an alkali metal salt of an anionic sulfonate surfactant and an alkali metal salt of a C.sub.8-C.sub.18 ethoxylated alkyl ether sulfate and/or a C.sub.8-C.sub.18 alkyl ether sulfate wherein the weight ratio of the sulfonate surfactant to the sulfate surfactant is from 15:1 to 1:1;
(b) 0% to 10% of an ethoxylated nonionic surfactant;
(c) 0 to 5% of polyethylene glycol;
(d) 0 to 10% of at least one solubilizing agent;
(e) 0 to 14% of at least one cosurfactant;
(f) 0 to 5% of an inorganic magnesium salt;
(g) 0 to 8% of a water insoluble organic ester or a water insoluble material such as terpene or essential oils;
(h) 0 to 2%, more preferably 0.05% to 2% of a thickener; and
(i) the balance being water.
The instant compositions do not contain an N-alkyl alkanolamide, choline chloride or buffering system which is a nitrogenous buffer which is ammonium or alkaline earth carbonate, guanidine derivates, alkoxylalkyl amines and alkyleneamines C
3
-C
7
alkyl and alkenyl monobasic and dibasic acids such as C
4
-C
7
aliphatic carboxylic diacids, phosphoric acid, amino alkylene phosphonic acid or more than 0.05 wt. % of a hydroxy aliphatic acid, and the composition is pourable and is not a gel.
The anionic sulfonate surfactants which may be used in the detergent of this invention are water soluble and include the sodium, potassium, ammonium and ethanolammonium salts of linear C
8
-C
16
alkyl benzene sulfonates; C
10
-C
20
paraffin sulfonates, alpha olefin sulfonates containing about 10-24 carbon atoms and C
8
-C
18
alkyl sulfates and mixtures thereof. The preferred anionic sulfonate surfactant is a C
12-18
paraffin sulfonate.
The paraffin sulfonates may be monosulfonates or di-sulfonates and usually are mixtures thereof, obtained by sulfonating paraffins of 10 to 20 carbon atoms. Preferred paraffin sulfonates are those of C
2-18
carbon atoms chains, and more preferably they are of C
14-17
chains. Paraffin sulfonates that have the sulfonate group(s) distributed along the paraffin chain are described in U.S. Pat. Nos. 2,503,280; 2,507,088; 3,260,744; and 3,372,188; and also in German Patent 735,096. Such compounds may be made to specifications and desirably the content of paraffin sulfonates outside the C
14-17
range will be minor and will be minimized, as will be any contents of di- or poly-sulfonates.
Examples of suitable other sulfonated anionic detergents are the well known higher alkyl mononuclear aromatic sulfonates, such as the higher alkylbenzene sulfonates containing 9 to 18 or preferably 9 to 16 carbon atoms in the higher alkyl group in a straight or branched chain, or C
8-15
alkyl toluene sulfonates. A preferred alkylbenzene sulfonate is a linear alkylbenzene sulfonate having a higher content of 3-phenyl (or higher) isomers and a correspondingly lower content (well below 50%) of 2-phenyl (or lower) isomers, such as those sulfonates wherein the benzene ring is attached mostly at the 3 or higher (for example 4, 5, 6 or 7) position of the alkyl group and the content of the isomers in which the benzene ring is attached in the 2 or 1 position is correspondingly low. Preferred materials are set forth in U.S. Pat. No. 3,320,174, especially those in which the alkyls are of 10 to 13 carbon atoms.
The C
8-18
ethoxylated alkyl ether sulfate surfactants have the structure
R—(OCHCH
2
)
n
OSO
3
−
M
+
wherein n is about 1 to about 22 more preferably 1 to 3 and R is an alkyl group having about 8 to about 18 carbon atoms, more preferably 12 to 15
Boyer Charles
Colgate-Palmolive Co.
Nanfeldt Richard E.
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