Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Heterogeneous arrangement
Reexamination Certificate
2003-02-05
2004-04-13
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Heterogeneous arrangement
C510S235000, C510S238000, C510S362000, C510S365000, C510S392000, C510S367000, C510S382000
Reexamination Certificate
active
06720301
ABSTRACT:
FIELD OF INVENTION
The present invention relates to an antibacterial dishwashing cleaning wipe which is a multi layer fabric composite.
BACKGROUND OF THE INVENTION
The patent literature describes numerous wipes for both body cleaning and cleaning of hard surfaces but none describe wipes for cleaning dishware flatware, pots and pans. U.S. Pat. Nos. 5,980,931, 6,063,397 and 6,074,655 teach a substantially dry disposable personal cleansing product useful for both cleansing and conditioning the skin and hair. U.S. Pat. No. 6,060,149 teaches a disposable wiping article having a substrate comprising multiple layers.
U.S. Pat. Nos. 5,756,612; 5,763,332; 5,908,707; 5,914,177; 5,980,922 and 6,168,852 teach cleaning compositions which are inverse emulsions.
U.S. Pat. Nos. 6,183,315 and 6,183,763 teach cleaning compositions containing a proton donating agent and having an acidic pH. U.S. Pat. Nos. 5,863,663; 5,952,043; 6,063,746 and 6,121,165 teaches cleaning compositions which are oil in water emulsions.
SUMMARY OF THE INVENTION
A single use cleaning wipe for dishwashing application comprises a composite of a preferably top smooth layer of a fine fiber needlepunched polyester layer, a center layer of a detergent film and a bottom layer of preferably a coarse fiber of a needlepunched polypropylene.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a cleaning wipe for dishware, flatware, pots, pans and hard surfaces which comprises approximately by weight:
(a) 20% to 80% of a top layer of fine or coarse fibers;
(b) 20% to 80% of a bottom layer of fine or coarse fibers;
(c) 5% to 40% of a center layer of detergent film, wherein the three layers are bonded together into a composite cleaning wipe, wherein the detergent film comprises approximately by weight:
(i) 2% to 18% of a water soluble polymer selected from the group consisting of methyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, poly(vinyl) alcohol, poly(vinyl) pyrrolidone, polyacrylic acid salts, polyacrylic/polymaleic copolymer and polyaspartic acid;
(ii) 25% to 50% of at least one surfactant selected from the group consisting of alkali metal salts of a fatty acids, ethoxylated nonionic surfactants, amine oxide surfactants, alkyl polyglucoside surfactants, zwitterionic surfactants, anionic surfactants and C
12
-C
14
fatty acid monoalkanol amides and mixtures thereof;
(iii) 0 to 2%, more preferably 0.1% to 1.5% of a perfume, essential oil or a water insoluble organic compound such as a hydrocarbon and mixtures thereof;
(iv) 0 to 15%, more preferably 0.1% to 10% of a cosurfactant selected from the group consisting of glycol ethers and short chain amphiphiles, and mixtures thereof;
(v) 0 to 15%, more preferably 0.1% to 10% of at least one solubilizing agent;
(vi) 0 to 7%, more preferably 0.1% to 5%, of an antibacterial agent;
(vii) 0 to 2.5%, more preferably 0.1% to 2% of a proton donating agent;
(viii) 0 to 6%, more preferably 0.05% to 3% of a perfume, wherein the unit dose detergent film contains less than 5 wt. % of water.
The water soluble nonionic surfactants which is utilized in this invention are commercially well known and include the primary aliphatic alcohol ethoxylates, secondary aliphatic alcohol ethoxylates, alkylphenol ethoxylates and ethylene-oxide-propylene oxide condensates on primary alkanols, such a Plurafacs (BASF) and condensates of ethylene oxide with sorbitan fatty acid esters such as the Tweens (ICl). The nonionic synthetic organic detergents generally are the condensation products of an organic aliphatic or alkyl aromatic hydrophobic compound and hydrophilic ethylene oxide groups. Practically any hydrophobic compound having a carboxy, hydroxy, amido, or amino group with a free hydrogen attached to the nitrogen can be condensed with ethylene oxide or with the polyhydration product thereof, polyethylene glycol, to form a water-soluble nonionic detergent. Further, the length of the polyethenoxy chain can be adjusted to achieve the desired balance between the hydrophobic and hydrophilic elements.
The nonionic detergent class includes the condensation products of a higher alcohol (e.g., an alkanol containing 8 to 18 carbon atoms in a straight or branched chain configuration) condensed with 5 to 30 moles of ethylene oxide, for example, lauryl or myristyl alcohol condensed with 16 moles of ethylene oxide (EO), tridecanol condensed with 6 to moles of EO, myristyl alcohol condensed with about 10 moles of EO per mole of myristyl alcohol, the condensation product of EO with a cut of coconut fatty alcohol containing a mixture of fatty alcohols with alkyl chains varying from 10 to 14 carbon atoms in length and wherein the condensate contains either 6 moles of EO per mole of total alcohol or 9 moles of EO per mole of alcohol and tallow alcohol ethoxylates containing 6 EO to 11 EO per mole of alcohol.
A preferred group of the foregoing nonionic surfactants are the Neodol ethoxylates (Shell Co.), which are higher aliphatic, primary alcohols containing about 9-15 carbon atoms, such as C
9
-C
11
alkanol condensed with 8 moles of ethylene oxide (Neodol 91-8), C
12-13
alkanol condensed with 6.5 moles ethylene oxide (Neodol 23-6.5), C
12-15
alkanol condensed with 12 moles ethylene oxide (Neodol 25-12), C
14-15
alkanol condensed with 13 moles ethylene oxide (Neodol 45-13), and the like. Such ethoxamers have an HLB (hydrophobic lipophilic balance) value of 8-15 and give good/W emulsification, whereas ethoxamers with HLB values below 8 contain less than 5 ethyleneoxy groups and tend to be poor emulsifiers and poor detergents.
Additional satisfactory water soluble alcohol ethylene oxide condensates are the condensation products of a secondary aliphatic alcohol containing 8 to 18 carbon atoms in a straight or branched chain configuration condensed with 5 to 30 moles of ethylene oxide. Examples of commercially available nonionic surfactants of the foregoing type are C
11-15
secondary alkanol condensed with either 9 EO (Tergitol 15-S-9) or 12 EO (Tergitol 15-S-12) marketed by Union Carbide.
Other suitable nonionic surfactants include the polyethylene oxide condensates of one mole of alkyl phenol containing from 8 to 18 carbon atoms in a straight- or branched chain alkyl group with 5 to 30 moles of ethylene oxide. Specific examples of alkyl phenol ethoxylates include nonyl condensed with 9.5 moles of EO per mole of nonyl phenol, dinonyl phenol condensed with 12 moles of EO per mole of phenol, dinonyl phenol condensed with 15 moles of EO per mole of phenol and di-isoctylphenol condensed with 15 moles of EO per mole of phenol. Commercially available nonionic surfactants of this type include Igepal CO-630 (nonyl phenol ethoxylate) marketed by GAF Corporation.
Also among the satisfactory nonionic surfactants are the water-soluble condensation products of a C
8
-C
20
alkanol with a heteric mixture of ethylene oxide and propylene oxide wherein the weight ratio of ethylene oxide to propylene oxide is from 2.5:1 to 4:1, preferably 2.8:1-3.3:1, with the total of the ethylene oxide and propylene oxide (including the terminal ethanol or propanol group) being from 60-85%, preferably 70-80%, by weight. Such surfactants are commercially available from BASF-Wyandotte and a particularly preferred detergent is a C
10
-C
16
alkanol condensate with ethylene oxide and propylene oxide, the weight ratio of ethylene oxide to propylene oxide being 3:1 and the total alkoxy content being 75% by weight.
Other suitable water-soluble nonionic surfactants which are less preferred are marketed under the trade name “Pluronics.” The compounds are formed by condensing ethylene oxide with a hydrophobic base formed by the condensation of propylene oxide with propylene glycol. The molecular weight of the hydrophobic portion of the molecule is of the order of 950 to 4000 and preferably 200 to 2,500. The addition of polyoxyethylene radicals to the hydrophobic portion tends to increase the solubility of the molecule as a whole so as to make the surfactant water-soluble. The molecular weight of t
Ghaim Josh
Gorlin Philip
Thomas Barbara
Wisniewski Karen
Boyer Charles
Colgate-Palmolive Co.
Nanfoldt Richard E.
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