Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-08-02
2002-04-16
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S199000, C510S238000, C510S319000, C510S356000, C510S382000, C510S384000, C510S391000, C510S398000, C510S421000, C510S504000
Reexamination Certificate
active
06372701
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a toilet bowl cleaner which contains a nonionic surfactant, a disinfecting agent, a polymeric viscosity modifier and water.
1. Background of the Invention
Numerous compositions and apparatus have been previously disclosed for cleaning toilet bowls. These compositions are designed to impede irritable smells and bacteria build up.
U.S. Pat. No. 4,852,201 teaches a cleaning composition containing a surfactant, alkali metal carbonate and acid.
U.S. Pat. No. 5,977,050 teaches a sprayable toilet bowl cleaning composition which is in a gel form which comprises a surfactant, crosslinked polyacrylic acid, a glycol ether solvent and water.
2. Summary of the Invention
The instant invention relates to a toilet bowl cleaning composition which contains an ethoxylated nonionic surfactant, a disinfecting agent, a polymeric thickening agent and water.
An object of the instant invention is to provide a thickened toilet bowl cleaner which permits easy cleaning of the vertical surfaces of the toilet bowl.
A further object of the instant invention is to provide a toilet bowl cleaner which is effective in killing germs.
A still further object of the instant invention is to provide a toilet bowl cleaner which is sprayable.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a liquid toilet bowl cleaning composition which comprises approximately by weight:
(a) 0.1% to 12%, more preferably 1% to 10% of a nonionic surfactant;
(b) 0.05% to 5%, more preferably 0.1% to 4% of a disinfecting agent;
(c) 0.05% to 2%, more preferably 0.1% to 1% of a perfume;
(d) 0.1% to 3%, more preferably 0.2% to 2% of a polymeric viscosity modifier; and
(e) the balance being water, wherein the composition does not contain an anionic surfactant, a cationic surfactant, an amphoteric surfactant, a zwitterionic surfactant, an ethylene glycol ether, a propylene glycol ether, a fluorosurfactant, a thickener such as silica, methyl cellulose, clay, xanthan gum, polysaccharide or magnesium aluminum silicate, a polyglucoside or glucoside surfactant, sodium hydroxide, a halogen donating compound such as halohydantoins such as 1,3-dichloro-5,5-dimethyl hydantoin, 1,3-dichloro-5-ethyl-5methyl hydantoin and 1-bromo-3-3-chloro-5,5-dimethyl hydantoin and calcium hypochlorite, an abrasive, a suspending agent such as a hydrophilic silica, calcium carbonate, sodium bicarbonate, aluminum oxide, polyacrylate, alignates, guar gum, cellulosics, or a propellant such as a hydrocarbon having 1 to 10 carbon atoms such as propane or isobutane.
Also excluded from the instant compositions are insoluble particles selected from the group consisting of polybutylene, polyethene, polyisobutylene, polymethyl styrene, polypropylene, polystyrene, polyurethane, nylon and teflon and mixtures thereof.
The water soluble nonionic surfactants 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 of primary alkanols, such a Plurafacs (BASF) and condensates of ethylene oxide with sorbitan fatty acid esters such as the Tweens (ICI). 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.
The nonionic detergent class includes the condensation products of a higher alcohol (e.g., an alkanol containing about 8 to 18 carbon atoms in a straight or branched chain configuration) condensed with about 5 to 30 moles of ethylene oxide, for example, lauryl or myristyl alcohol condensed with about 16 moles of ethylene oxide (EO), tridecanol condensed with about 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 about 14 carbon atoms in length and wherein the condensate contains either about 6 moles of EO per mole of total alcohol or about 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 alcohol 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 about 8 to 15 and give good O/W emulsification, whereas ethoxamers with HLB values below 8 contain less than 5 ethyleneoxide 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 detergents of the foregoing type are C
11
-C
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 detergents include the polyethylene oxide condensates of one mole of alkyl phenol containing from about 8 to 18 carbon atoms in a straight- or branched chain alkyl group with about 5 to 30 moles of ethylene oxide. Specific examples of alkyl phenol ethoxylates include nonyl phenol condensed with about 9.5 moles of EO per mole of nonyl phenol, dinonyl phenol condensed with about 12 moles of EO per mole of dinonyl phenol, dinonyl phenol condensed with about 15 moles of EO per mole of phenol and di-isoctylphenol condensed with about 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.
Condensates of 2 to 30 moles of ethylene oxide with sorbitan mono- and tri-C
10
-C
20
alkanoic acid esters having a HLB of 8 to 15 also may be employed as the nonionic detergent ingredient in the described shampoo. These surfactants are well known and are available from Imperial Chemical Industries under the Tween trade name. Suitable surfactants include polyoxyethylene (4) sorbitan monolaurate, polyoxyethylene (4) sorbitan monostearate, polyoxyethylene (20) sorbitan trioleate and polyoxyethylene (20) sorbitan tristearate.
The disinfectant agent is selected from the group consisting of C
8
-C
16
alkyl benzyl dimethyl ammonium chlorides, C
8
-C
16
dialkyl dimethyl ammonium chlorides, C
8
-C
16
alkyl, C
8
-C
14
alkyl, dimethyl ammonium chloride and chlorohexidine and mixtures thereof. Some typical disinfectant agents useful in the instant compositions are manufactured by Lonza, S. A. They are: Bardac 2180 (or 2170) which is N-decyl-N-isonoxyl-N, N-dimethyl ammonium chloride; Bardac 22 which is didecyl dimethyl ammonium chloride; Bardac LF which is N,Ndioctyl-N, N-dimethyl ammonium chloride; Bardac 114 which is a mixture in a ratio of 1:1:1 of N-alkyl-N, N-didecyl-N, N-dimethyl ammonium chloride/N-alkyl-N, N-dimethyl-N-ethyl ammonium chloride; and Barquat MB-50 which is N-alkyl-N, N-dimethyl-N-benzyl ammonium chloride. The preferred disinfecting agent is a C
8
-C
16
alkyl benzyl dimethyl ammonium chloride.
The polymeric viscosity modifier which permits the toilet bowl cleaning composition to have a Brookfield viscosity RVDV, 25° C., cps about 150 to 400 cps, more preferably 175 to 250 cps. The polymeric
Aszman Harry
Blanvalet Claude
Kugler Alison
Boyer Charles
Colgate - Palmolive Company
Nanfeldt Richard E.
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