Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – With oxygen or halogen containing chemical bleach or oxidant...
Reexamination Certificate
2002-01-31
2002-11-19
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
With oxygen or halogen containing chemical bleach or oxidant...
C510S238000, C510S302000, C510S319000, C510S382000, C510S367000, C510S379000, C510S384000, C510S391000, C510S503000, C510S504000, C510S518000
Reexamination Certificate
active
06482791
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a liquid bleach cleaner composition.
PRIOR ART
Stains on hard surfaces in houses widely differ depending on the surfaces as objects to be cleaned. Generally, stains complexed by modified oils, dusts, etc. tend to adhere to kitchen ranges. In toilets and bathrooms, stains are insoluble salts themselves that are formed from inorganic substances and organic substances or, alternatively, stains are formed by bacteria or fungi that grow using these substances as bases. Among the stains on hard surfaces, particularly the blackish stains derived from these bacteria or fungi are difficult to remove sufficiently by a cleaner composed mainly of a surfactant and an abrasive material. For this reason, a chlorine-based bleach cleaner comprising a hypochlorite is used.
Japanese Patent Application Laid-Open (JP-A) No. 56-90897 describes a viscous-liquid, concentrated, chlorine-based bleach composition composed of an aqueous solution of hypochlorite containing a surfactant selected from a trialkylamine oxide, betaine, and a quaternary ammonium compound, a surfactant selected from a fatty acid salt, an acylsarcosinate salt, an alkyltauride salt, a sugar ester, and an alkylether sulfate, and a buffer agent. JP-A No. 57-61099 describes a liquid bactericidal bleach composition which contains a hypochlorite and a quaternary ammonium-type cationic surfactant and is excellent in bactericidal effect. Meanwhile, JP-A No. 7-82593 of the present inventors discloses a liquid bleach composition which contains a hypochlorite, a quaternary ammonium salt having a specific structural formula, and at least one selected from an alkylsulfate, an polyoxyethylene alkylether sulfate, an alkylbenzenesulfonate, and an amphoteric surfactant and is excellent in oily stain bleaching.
These liquid bleach cleaners are coated directly or sprayed on fungous stains by means of a manual sprayer. In view of the scattering problem at the time of spraying, JP-A No. 63-72798 and JP-A No. 63-165495 describe a method of inhibiting the scattering by forming foam at the time of spraying by the incorporation of a surfactant and a hydrotrope.
JP-A 1-153797 discloses a liquid bleach cleaner composition containing an alkali metal salt of hypochlorous acid,a quaternary ammonium salt having one long chain (C14-18) alkyl group, an arylsulfonate such as sodium xylenesulfonate and toluenesulfonic acid and an alkali metal hydroxide.
JP-A 2001-192700, published on Jul. 17th 2001, discloses a liquid bleach cleaner composition containing an alkali metal salt of hypochlorous acid, a quaternary ammonium salt and an alkali metal hydroxide.
JP-A10-204495discloses a liquid bleach cleaner composition containing hypochlorite, an alkali metal hydroxide, apolyoxyethylene alkylether sulfate,a fatty acid salt having a specified alkyl chain and at least one selected from cumenesulfonic acid, xylenesulfonic acid, toluenesulfonic acid and an alkali metal salt thereof.
Conventional chlorine-based bleach cleaners were satisfactorily effective to the stains on tiles or joints and to other blackish stains. In recent times, besides the stains on tiles or joints, there has been an increasing case where fungi grow on resin parts such as silicone resin-based caulkings used as joints between wall and bathtub, etc. or soft polyvinyl chloride-based packings, etc. This presents the problem that, even if conventional chlorine-based bleach cleaners exhibit satisfactory effects on tiles or joints, it is difficult to bleach and remove by decomposition the fungi on the above-mentioned resin parts by the conventional bleach cleaners.
The present inventors found that the bleaching effect is enhanced by the incorporation of a cationic surfactant into a system containing a hypochlorite because the contact of hypochlorite ions with a hydrophobic material becomes better. However, in a storability test at a high temperature, in particular at about 60° C., the stability of the composition incorporated with a cationic surfactant was found to be inferior in comparison with conventional fungi-removing compositions.
SUMMARY OF INVENTION
The object of the present invention is to provide a bleach cleaner composition which exhibits excellent bleach cleaning power to the fungi on resin parts and yet ensures excellent storage stability of a hypochlorite at a high temperature.
The invention provides a liquid bleach cleaner composition comprising 0.1 to 7.0% by mass of (a) an alkali metal salt of hypochlorous acid, 0.01 to 3.0% by mass of (b) a quaternary ammonium surfactant represented by the formula (1):
wherein R
1
is an alkyl group having 8 to 10 carbon atoms, alternatively an alkyl group having 8 or 10 carbon atoms;
R
2
and R
3
are each a methyl group or an ethyl group; and
R
4
is a methyl group, an ethyl group or a benzyl group;
and X
−
is a halogen ion or R
5
SO
4
.R
5
representing an alkyl group having 1 to 5 carbon atoms.
0.1 to 3% by mass of (c) at least one selected from the group consisting of cumenesulfonic acid, xylenesulfonic acid, toluenesulfonic acid and alkali metal salts thereof, 0.2 to 3.0% by mass of (d) an alkali metal hydroxide and water.
The above shown composition may contain the balance of water.
The composition may further comprise (e) an amphoteric surfactant selected from the group consisting of an amine oxide surfactant having at least one alkyl group of 8 to 16 carbon atoms and a carboxybetaine surfactant having at least one alkyl group of 8 to 16 carbon atoms.
It may preferably comprise (f) a fatty acid of 6 to 14 carbon atoms or an alkali metal salt thereof.
It is preferable that the composition comprises 1 to 3% by mass of (a), 0.01 to 0.5% by mass of (b), 0.1 to 2% by mass of (c), 0.3 to 0.8% by mass of (d) and 0.05 to 1% by mass of (e). More preferable is the composition comprising (a) sodium hypochlorite, (b) octyldimethylbenzyl ammonium chloride, (c) sodium m-xylenesulfonate, (d) sodium hydroxide and (e) dimethyllauryl amineoxide.
The invention provides a bleach composition loaded into a spray container, wherein the bleach composition is the above shown composition.
DETAILED EXPLANATION OF INVENTION
Examples of the alkali metal salt of hypochlorous acid constituting the component (a) include sodium hypochlorite, potassium hypochlorite, etc. Sodium hypochlorite is particularly preferable. The content of the component (a) in the bleach cleaner composition for hard surface according to the present invention is in the range of 0.1 to 7.0% by mass, preferably in the range of 0.5 to 5.0% by mass, and more preferably in the range of 1.0 to 3.0% by mass. A sufficient bleaching power can be obtained if the content of the component (a) is 0.1% by mass or more, and a good stability can be obtained if the content of the component (a) is 7.0% by mass or less.
The component (b), that is, the quaternary ammonium-type surfactant represented by the formula (1), is intended for the enhancement of the bleach cleaning effect, which was not sufficiently provided by a conventional chlorine-based bleach cleaner, for bacterial or fungous stains on resins. This enhancement is obtained presumably because the quaternary ammonium-type surfactant improves the contact of hypochlorite ions with a hydrophobic material.
The present invention provides a liquid bleach cleaner composition which is effective to a resinous material. If the object resin is a vinyl chloride-based resin that is used as a packing material for window frames, etc., a compound, represented by the general formula (1) wherein R
1
has 8 carbon atoms, is most effective.
The content of the component (b) in the liquid bleach cleaner composition of the present invention is in the range of 0.01 to 3.0% by mass, preferably in the range of 0.01 to 1.0% by mass, and more preferably in the range of 0.01 to 0.5% by mass. The contents of the component (b) in these ranges lead to storage stability and effectiveness in the stain removal from resins.
The incorporation of the component (c) into the composition of the present invention makes it possible to enhance the
Sano Yutaka
Tsukuda Kazunori
Yamada Hiroyuki
Boyer Charles
Kao Corporation
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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