Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Clay or inorganic aluminosilicate salt component
Reexamination Certificate
2000-10-31
2002-10-15
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Clay or inorganic aluminosilicate salt component
C510S320000, C510S323000, C510S351000, C510S356000, C510S357000, C510S361000, C510S511000, C510S300000, C510S347000, C510S509000, C510S324000, C510S360000, C510S392000, C510S421000, C510S426000, C510S434000, C510S466000, C510S475000, C510S478000, C510S532000, C510S533000
Reexamination Certificate
active
06465418
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a free flowing granular cleaning composition for use in fabric care, wherein the composition contains a nonionic surfactant and a zeolite MAP.
BACKGROUND OF THE INVENTION
In recent years the use of zeolite in fabric cleaning compositions as a replacement for phosphate as a detergent builder has increased because of the ability of the zeolite (crystalline alkali metal aluminosilicate) to sequester calcium ions from the aqueous wash solution.
More recently the use of the traditional Zeolite A has been replaced by the use of zeolite MAP (maximum aluminum zeolite P which has a silicon to aluminum ratio of less than 1.33).
Zeolite MAP has been previously disclosed in the literature. EP384070A discloses the use of zeolite MAP in a cleaning composition. EP0448297A, EP0502675A, EP0533392B1 and EP0695341B1 teaches the use of zeolite MAP in combination with a bleach system for use in cleaning compositions. PCT W097/34979 also teaches the use of zeolite MAP in combination with a bleaching system. U.S. Pat. Nos. 5,238,594; 5,259,981; 5,259,982 and 5,498,342 are also directed to cleaning compositions containing Zeolite MAP.
SUMMARY OF THE INVENTION
The present invention relates to a free flowing granular, low foaming fabric cleaning composition which comprises a zeolite MAP builder, a nonionic surfactant, less than 2.5 wt. % of an anionic surfactant, a polyacrylate polymer, at least one nonphosphate supplemental builder, which is not a zeolite and enzymes.
An object of the instant invention is to provide a free flowing granular, low foaming fabric cleaning composition which has a foam height at the end of the wash cycle in a top load washing machine at a dose level of 92 ml of less than 3 inches.
PCT Wo94/28109, EP0714432B1 and U.S. Pat. Nos. 5,490,954 and 5,518,649 teach cleaning compositions using zeolite MAP in combination with high levels of anionic surfactant as well as salts of fatty acids.
The aforementioned patents fail to provide a bleach free cleaning composition which has a low foam profile of less than 3 inches such that the cleaning composition can be used in either a front or top load washing machine.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention relates to a free flowing granular, low foaming fabric cleaning composition having a bulk density of 0.4 to 0.85, more preferably 0.60 to 0.65 grams/cc which comprises approximately by weight:
(a) 5% to 20%, more preferably 7% to 11% of an ethoxylated nonionic surfactant;
(b) 2.5% to 30%, more preferably 12% to 18% of a zeolite on active basis or express as anhydrosis zeolite having a silicon to aluminum weight ratio of less than 1.33;
(c) 20% to 40%, preferably 32% to 38% of a supplemental detergent builder salt such as an alkali metal carbonate such as sodium carbonate;
(d) 0 to 2.5%, more preferably 0.5% to 2% of a sulfate or sulfonate anionic surfactant;
(e) 0.5% to 5.0%, more preferably 1.0% to 3.0% of a polyacrylate type polymer which functions as an agglomerating aid as well as a chelating agent for calcium and/or magnesium ions as well as an antiredeposition agent;
(f) 0.5% to 35%, more preferably 15% to 25% of sodium sulfate;
(g) 0.5% to 7%, more preferably 1% to 6% of an alkali metal silicate such as sodium silicate or potassium silicate; and
(h) 0 to 3%, more preferably 0.05% to 1.5% of at least one enzyme, wherein the composition does not contain an alkali metal salt of a fatty acid or a bleach compound.
The present invention also relates to a composition having a bulk density of 0.75 to 0.85 grams/cc comprising approximately by weight:
(a) 5% to 60%, more preferably 10% to 45% of a zeolite having a silicon to aluminum ratio of less than 1.33;
(b) 0 to 55%, more preferably 5% to 50% of an alkali metal carbonate;
(c) 0 to 10%, more preferably 0.1% to 6% of a polyacrylate type polymer;
(d) 0 to 2%, more preferably 0.1% to 1% of a brightener; and
(e) 10% to 40% of an ethoxylated nonionic surfactant, wherein said ethoxylated nonionic surfactant is adsorbed on said zeolite and said alkali metal carbonate, wherein the composition does not contain a bleach compound or an alkali metal salt of a fatty acid or more than 6 wt. % of a sulfate or sulfonated surfactant and the composition does not contain a defloculating polymer containing a mercapto moiety attached to a hydrophilic polymeric chain nor does the composition contain a Zeolite HS (hydroxy zeolite), a Zeolite A, a Zeolite X, a Zeolite Y, a Zeolite B or a Zeolite P or a Zeolite B having a three dimensional channel system.
Suitable anionic surfactants used in the instant compositions at less than 6 wt. % include the water-soluble alkali metal salts having alkyl radicals containing from about 8 to about 22 carbon atoms, the term alkyl being used to include the alkyl portion of higher acyl radicals. Examples of suitable synthetic anionic detergent compounds are sodium and potassium alkyl sulphates, especially those obtained by sulphating higher (C
8
-C
18
) alcohols produced, for example, from tallow or coconut oil; sodium and potassium alkyl (C
9
-C
20
) benzene sulfonates, particularly sodium linear secondary alkyl (C
10
-C
15
) benzene sulfonates; sodium alkyl glycerol ether sulfates, especially those ethers of the higher alcohols derived from tallow or coconut oil and synthetic alcohols derived from petroleum; sodium coconut oil fatty monoglyceride sulfates and sulfonates; sodium and potassium salts of sulfuric acid esters of higher (C
8
-C
8
) fatty alcohol-alkylene oxide, particularly ethylene oxide reaction products; the reaction products of fatty acids such as coconut fatty acids esterified with isethionic acid and neutralized with sodium hydroxide; sodium and potassium salts of fatty acid amides of methyl taurine; alkane monosulfonates such as those derived from reacting alpha-olefins (C
8
-C
20
) with sodium bisulfite and those derived from reacting paraffins with SO
2
and Cl
2
and then hydrolyzing with a base to produce a random sulfonate; and olefin sulfonates which term is used to describe the material made by reacting olefins, particularly C
10
-C
20
alpha-olefins, with SO
3
and then neutralizing and hydrolyzing the reaction product. The preferred anionic surfactants are (C
10
-C
18
) alkyl polyethoxy (1-11 Eo) sulfates and mixtures thereof having differing water solubilities.
Suitable nonionic surfactants used in the instant compositions include, in particular, the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example aliphatic alcohols, acids, amides and alkyl phenols with alkylene oxides, especially ethylene oxide, either alone or with propylene oxide. Specific nonionic surfactant compounds are alkyl (C
6
-C
18
) primary or secondary linear or branched alcohols condensed with ethylene oxide, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine. [Other so-called nonionic surfactant compounds include long chain tertiary amine oxides, long-chain tertiary phosphine oxides, dialkyl sulfoxides, fatty (C
8
-C
18
) esters of glycerol, sorbitan and the like, alkyl polyglycosides, ethoxylated glycerol esters, ethyoxylated sorbitans and ethoxylated phosphate esters.]
The preferred non-ionic surfactant compounds are those of the ethoxylated and mixed ethyoxylated-propyloxylated (C
12
-C
15
), (C12-C14) (C14-C16) fatty alcohol or synthetic alcohol, containing 6 to 11 ethylene oxide (EO) groups.
The Zeolite MAP used in the instant compositions is defined as an alkali metal aluminosilicate having a silicon to aluminum ratio not greater than 1.33, preferably within the range of from 0.9 to 1.33, and more preferably within the range of 0.9 to 1.2 and the Zeolite MAP has a two dimensional channel system and elliptical shaped pore openings. Of especial interest is zeolite MAP having a silicon to aluminum ratio not greater than 1.15; and zeolite MAP having a silicon to aluminum ratio not greater than 1.07 is especially preferred. Although zeolite MAP like other zeolites contains water
Adams Richard
Beagle Charles
Beck David
Colgate-Palmolive Co.
Delcotto Gregory
Mruk Brian P.
Nanfeldt Richard E.
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