JPH10176185A - Detergent composition for hard surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent which exhibits a high detergency without damaging a hard surface, esp. a plastic surface, by preparing a detergent compsn. which cointains an amine oxide surfactant, does not substantially contain an org. solvent, and has specified surface tensions. SOLUTION: This compsn. contains an amine oxide surfactant, does not susbtantially contain an org. solvent, and has a value of γOW.cosθ of 0mN/m or lower. The value is obtd. by the equation: γOW.cosθ=γWs-γOS (wherein γWS, γOS, and γOW are the interfacial tensions at the interfaces of detergent compsn./hard surface, oil/hard surface, and detergent compsn./oil, respectively, in the case when rapeseed oil is used as the model oily dirt, and polypropylene as the hard surface; and θ is the contact angle between the oil and the hard surface at the three-phase boundary surface formed by the detergent compsn./oil interface and the oil/hard surface interface). The amine oxide surfactant used is pref. the one represented by the formula (wherein R<1> is a 7-21C alkyl, etc.).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning composition for hard surfaces, and more particularly, to a cleaning composition for hard surfaces that exhibits good cleaning performance without damaging hard surfaces, especially plastic surfaces. .

[0002]

2. Description of the Related Art Tableware,
Plastics such as polyethylene and polypropylene are often used for hard surfaces around kitchens and houses. Various cleaning agents are used for cleaning these hard surfaces, and in general, an organic solvent such as ethanol is blended to stabilize the solution of these cleaning agents or to improve the cleaning power against oil stains. ing.

[0003] However, there is a problem that the organic solvent contained in the cleaning agent easily penetrates into the inside of the plastic, and the hard surface is damaged after cleaning.

Accordingly, an object of the present invention is to provide a cleaning composition for hard surfaces which shows good cleaning performance without damaging hard surfaces, especially plastic surfaces.

[0005]

Means for Solving the Problems As a result of earnest studies, the present inventors have found that a detergent composition containing a specific surfactant and having a specific interfacial tension can solve the above-mentioned problems. It was completed. That is, the present invention relates to a detergent composition containing an amine oxide-based surfactant and substantially not containing an organic solvent, wherein the value of γow · cosθ represented by the following formula (I) is 0 mN / m An object of the present invention is to provide a hard surface cleaning composition characterized by the following.

Γow · cosθ = γws−γos (I) (where γws, γos, and γow are cleaning composition / hard surface and oil, respectively, when rapeseed oil is used as a model oil stain and polypropylene is used as a hard surface). / Hard surface, detergent composition / interfacial tension at the oil interface, θ is the contact angle between the oil and hard surface at the three phase boundary formed from the detergent composition / oil interface and the oil / hard surface interface. Is.)

[0007]

Embodiments of the present invention will be described below in detail.

The amine oxide surfactant used in the present invention is not particularly limited as long as it has an amine oxide group, but an amide type amine oxide represented by the following general formula (II) is particularly preferable. .

[0009]

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[Wherein, R ¹ represents a linear or branched alkyl or alkenyl group having 7 to 21 carbon atoms, and R ² represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group. , R ³ and R ⁴ are the same or different and each have 1 to 4 carbon atoms.
Represents an alkyl group or a hydroxyalkyl group, and n is 2
Shows the number of ~ 5. In the general formula (II), R ¹ represents a linear or branched alkyl group or alkenyl group having 7 to 21 carbon atoms, preferably 11 to 17 carbon atoms, particularly preferably linear alkyl having 15 carbon atoms. Group. R ² represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group, preferably a hydrogen atom, a methyl group or a hydroxyethyl group, particularly preferably a hydrogen atom. R ³ and R ⁴ are the same or different and each represent an alkyl group having 1 to 4 carbon atoms or a hydroxyalkyl group, preferably a methyl group, an ethyl group, or a hydroxyethyl group, particularly preferably a methyl group. n represents a number of 2 to 5, preferably 2 to 3, and particularly preferably 3.

Specific examples of the amide-type amine oxide represented by the general formula (II) include palmitoylamidopropyl-N, N-dimethylamine oxide, myristoylamidopropyl-N, N-dimethylamine oxide,
Lauroylamidopropyl-N, N-dimethylamine oxide, cocoylamidopropyl-N, N-dimethylamine oxide, palmitoylamidopropyl-N,
N-diethylamine oxide, myristoylamidopropyl-N, N-diethylamineoxide, lauroylamidopropyl-N, N-diethylamineoxide, cocoylamidopropyl-N, N-diethylamineoxide, palmitoylamidopropyl-N, N-dihydroxyethylamineoxide, Myristoylamidopropyl-N, N-dihydroxyethylamine oxide, lauroylamidopropyl-N, N-dihydroxyethylamineoxide, cocoylamidopropyl-
N, N-dihydroxyethylamine oxide, palmitoylamidoethyl-N, N-dimethylamineoxide, myristoylamidoethyl-N, N-dimethylamineoxide, lauroylamidoethyl-N, N-dimethylamineoxide, cocoylamidoethyl-N, N
-Dimethylamine oxide, myristoylamidopropyl-N-hydroxyethyl-N-methylamine oxide and the like, and palmitoylamidopropyl-N,
N-dimethylamine oxide is particularly preferred.

The content of the amine oxide surfactant in the detergent composition of the present invention is preferably 0.0005 to 10% by weight, particularly preferably 0.02 to 8% by weight.

Further, in the cleaning composition of the present invention, the value of γow · cosθ represented by the above formula (I) is 0 mN / m or less. The value of γow · cos θ will be described below.
FIG. 1 schematically shows a state in which an oil (rapeseed oil) 2 attached to a hard surface (polypropylene) 1 is present in a detergent composition 3. At the three contact points of the oil / cleaning composition / hard surface, the three types of interfacial tension are balanced, and the following formula (II)
The Young's equation shown in I) holds.

Γws = γos + γow · cos θ (III) (where γws, γos, γow and θ have the above-mentioned meanings) In the detergent composition, oil adhered in the form shown in FIG. As the surfactant molecules in the detergent composition are adsorbed on the hard surface and oil surface, the interfacial tension between the detergent composition / hard surface (γws) and the interfacial tension between the detergent composition / oil ( γow). Γos is unaffected because no surfactant molecules can penetrate between the oil and the hard surface. Therefore, the three-phase contact point of the oil / cleaning composition / hard surface is γ
The oil droplet is pulled toward the oil side by a relatively large force of os, and the oil droplet tends to be round (θ is large). Such a deformation process of the oil stain is called rolling-up, and the value of γow · cosθ represented by the above formula (I) is 0 mN / m or less, that is, γws decreases and γos relatively increases, When γos becomes larger than γws, the energy required for soil removal is reduced, the oil stains are spontaneously detached, and the ability to remove oil stains is improved. The value of γow · cosθ is 0 mN / m
If it is larger, the ability to remove oil stains is undesirably reduced.

The cleaning composition of the present invention contains substantially no organic solvent. That is, conventionally used detergent compositions include, in order to improve the stability of the solution and the detergency against oil stains, ethanol, lower alcohols such as isopropanol, glycols such as ethylene glycol, polyethylene glycol and propylene glycol. ,
Although diethylene glycol monoalkyl ethers such as diethylene glycol monoethyl ether and diethylene glycol monobutyl ether are blended, the cleaning composition of the present invention contains an amine oxide surfactant and has a value of γow · cos θ of 0 mN. / M or less, it has sufficient stability and detergency against oil stains even if it does not substantially contain an organic solvent.

Since the cleaning composition of the present invention contains substantially no organic solvent, it can prevent damage to hard surfaces, especially plastic hard surfaces, and increase the flash point. The temperature can be raised to 60 ° C. or higher, and safety can be improved. The cleaning composition of the present invention is suitable for cleaning hard surfaces, especially plastic surfaces such as polyethylene and polypropylene.

In the cleaning composition of the present invention, in addition to the above-mentioned amine oxide surfactant, an anionic surfactant,
A surfactant selected from a nonionic surfactant, a cationic surfactant and an amphoteric surfactant can be blended.

Examples of the anionic surfactant incorporated in the detergent composition of the present invention include polyoxyethylene having an alkyl group having 8 to 14 carbon atoms (average addition mole number (hereinafter abbreviated as p) = 0). ~ 6) alkyl ether sulfate,
Linear alkylbenzene sulfonate having 8 to 14 carbon atoms, α-olefin sulfonate having 8 to 14 carbon atoms, 8 to 14 carbon atoms
18 secondary alkane sulfonates, 8 to 14 carbon atoms of α-sulfofatty acid ester salts, polyoxyethylene (p = 0 to 6) alkyl ether carboxylates having an alkyl group of 7 to 15 carbon atoms, carbon number Polyoxyethylene (p = 0 to 6) monoalkyl ether phosphate having an alkyl group having 8 to 14 carbon atoms, N-acylmethyl taurate having 8 to 16 carbon atoms, polyoxyethylene having 8 to 14 carbon atoms (p = 0-10)
Monoester salts of alkyl ethers and sulfosuccinic acids, N-acyl glutamates having 8 to 16 carbon atoms and the like can be mentioned.

Examples of the amphoteric surfactant to be incorporated in the detergent composition of the present invention include a carbobetaine type surfactant and a sulfobetaine type surfactant.

Examples of the nonionic surfactant to be incorporated in the detergent composition of the present invention include polyoxyethylene (p = 3-20) alkyl ether having an alkyl group having 8 to 14 carbon atoms, and an alkyl ether having 8 to 18 carbon atoms. And mono- and dialkanolamides of fatty acids having 8 to 18 carbon atoms.

The cationic surfactant to be incorporated in the cleaning composition of the present invention includes a compound represented by the following formula (IV).

[0022]

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Wherein R ⁵ represents an alkyl group having 8 to 22 carbon atoms, and R ⁶ , R ⁷ and R ⁸ may be the same or different and have 1 to 3 carbon atoms.
Indicates an alkyl group or a benzyl group, X ^- is Cl ^-, Bl ^-, C
It represents an anion group such as ^- H ₃ COO. Further, the cleaning composition of the present invention may contain other optional components as long as the stability, cleaning performance and foaming performance of the composition are not impaired. Examples of the optional component include chelates such as ethylenediaminetetraacetate, diethylenetriaminepentaacetate, sodium acid pyrophosphate, tetrasodium pyrophosphate, sodium tripolyphosphate, ethylhydroxydiphosphonate, citric acid, dipicolinic acid, picolinic acid, and 8-hydroxyquinoline. Solubilizers such as sodium and potassium salts of toluenesulfonic acid and xylenesulfonic acid and urea; Viscosity modifiers such as clay minerals and water-soluble polymers; humectants such as glycerin and sorbitol; Feeling enhancer; other enzymes, fragrances, dyes, antiseptic / antifungal agents and the like can be added.

The detergent composition of the present invention is prepared by mixing an amine oxide-based surfactant, and if necessary, an optional component and water by a conventional method, and adjusting the value of γow · cosθ to be 0 mN / m or less. Obtainable. At this time, the pH is 6 ~
Adjustment to 12 is preferred.

[0025]

The cleaning composition of the present invention exhibits good cleaning performance without damaging hard surfaces, especially plastic surfaces. Also, when filled in a spray container or the like and sprayed, no dripping occurs and the spray retention is good.

[0026]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. The percentages in the examples are on a weight basis unless otherwise specified.

Examples 1 to 7 and Comparative Examples 1 to 2 A cleaning composition having the composition shown in Table 1 and having a γow · cos θ value shown in Table 1 was prepared. , Spray retention and substrate damage were evaluated. Table 1 shows the results.

<Method of Evaluating Plastic Detergency> Rapeseed oil was heated at 110 ° C. for 30 minutes, and 1 g of the oil was applied on a polypropylene plate. 1 ml of each cleaning composition filled in a spray container was sprayed on the soiled polypropylene surface, and wiped 10 times with a paper towel. After this operation,
The polypropylene surface was evaluated according to the following criteria.

Criteria ：: No residual stain is observed Δ: No residual stain is observed with the naked eye, but is observed with a microscope ×: Residual soil is observed with the naked eye

<Evaluation Method of Spray Retention> Each cleaning composition packed in a spray container was sprayed from a distance of 20 cm to a vertical stainless steel surface, and the degree of dripping after spraying was evaluated.・ Criteria ○: Almost no dripping ×: Dripping and cleaning impossible.

<Evaluation Method of Substrate Damage> As shown in FIG. 2, a test piece (L70 × W25 mm) 4 made of an acrylic resin, an ABS resin and polystyrene is given a stress to remove cotton wool.
A solution prepared by impregnating 0.5 ml of each cleaning composition into 0.05 g was placed on a test piece, allowed to stand at room temperature for 24 hours, washed with water, and visually evaluated according to the following criteria. Criteria ○: No change in appearance of test piece surface △: Part of test piece surface whitened ×: Crack generation on test piece surface

[0032]

[Table 1]

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a state in which an oil attached to a hard surface is present in a detergent composition.

FIG. 2 is a schematic view of a test piece used in a method for evaluating damage to a substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard surface 2 Oil 3 Cleaning composition 4 Test piece

Claims (6)

[Claims] 1. A detergent composition containing an amine oxide surfactant and containing substantially no organic solvent, wherein the value of γow · cosθ represented by the following formula (I) is 0 mN /
m or less. γow · cosθ = γws-γos (I) (where γws, γos, and γow are detergent composition / hard surface and oil / hard surface, respectively, when rapeseed oil is used for model oil stain and polypropylene is used for hard surface). Is the interfacial tension at the detergent composition / oil interface, and θ is the contact angle between the oil and hard surface at the three phase boundary formed from the detergent composition / oil interface and the oil / hard surface interface. ) 2. An amine oxide-based surfactant represented by the general formula (II): [In the formula, R ¹ represents a linear or branched alkyl group or alkenyl group having 7 to 21 carbon atoms, R ² represents a hydrogen atom,
4 represents an alkyl group or a hydroxyalkyl group, R ³ and R ⁴ are the same or different and represent an alkyl group or a hydroxyalkyl group having 1 to 4 carbon atoms, and n represents a number of 2 to 5. The cleaning composition according to claim 1, which is an amide-type amine oxide represented by the formula: 3. In the general formula (II), R ¹ is a linear alkyl group having 15 carbon atoms, R ² is a hydrogen atom, R ³ and R ⁴ are methyl groups,
3. The cleaning composition according to claim 2, wherein n is 3. 4. The cleaning composition according to claim 1, wherein the content of the amine oxide surfactant is 0.0005 to 10% by weight. 5. The method according to claim 1, wherein the pH is adjusted to 6 to 12.
The cleaning composition according to any one of claims 4 to 7. 6. The cleaning composition according to claim 1, wherein the hard surface is a plastic surface.