LIQUID DETERGENT COMPOSITION FOR HARD SURFACES

Abstract

Provided is a liquid detergent composition for hard surfaces which contains (a1) an amine oxide-type surfactant having at least one alkyl group or alkenyl group with 13 or more and 18 or less carbons [hereinafter, referred to as component (a1)]; and (b1) a sorbitan fatty acid ester in which the fatty acid residue has 10 or more and 18 or less carbons [hereinafter, referred to as component (b1)]; and water, wherein the mass ratio of the content of component (a1) to the content of component (b1), (a1)/(b1), is 0.4 or more.

Also provided is a liquid detergent composition for hard surfaces which contains a surfactant in an amount of 0.1% by mass or more and 20% by mass or less; and water, wherein the liquid detergent composition contains, as the surfactant, (a2) an amine oxide-type surfactant having at least one alkyl group or alkenyl group with 7 or more and 12 or less carbons [hereinafter, referred to as component (a2)] and (b2) a glycerin fatty acid ester in which the fatty acid residue has 10 or more and 18 or less carbons [hereinafter, referred to as component (b2)], and wherein in the surfactant, the total content of the content of component (a2) and the content of component (b2) is 40% by mass or more.

Claims

1. A liquid detergent composition for hard surfaces, comprising: (a1) an amine oxide-type surfactant having at least one alkyl group or alkenyl group with 13 or more and 18 or less carbons [hereinafter, referred to as a component (a1)]; and (b1) a sorbitan fatty acid ester in which the fatty acid residue has 10 or more and 18 or less carbons [hereinafter, referred to as a component (b1)]; and water, wherein a mass ratio of the content of the component (a1) to the content of the component (b1), (a1)/(b1), is 0.4 or more.

2. The liquid detergent composition for hard surfaces according to claim 1, wherein the mass ratio of the content of the component (a1) to the content of the component (b1), (a1)/(b1), is 0.7 or more and 20 or less.

3. The liquid detergent composition for hard surfaces according to claim 1, wherein the total content of the content of the component (a1) and the content of the component (b1) is 0.02% by mass or more and 40% by mass or less.

4. The liquid detergent composition for hard surfaces according to claim 1, wherein the number of carbons in the fatty acid residue of the component (b1) is 18.

5. The liquid detergent composition for hard surfaces according to claim 1, wherein a content of a surfactant other than the component (a1) and the component (b1) is less than 5% by mass.

6. The liquid detergent composition for hard surfaces according to claim 1, wherein the liquid detergent composition for hard surfaces has a pH of 5 or more and 9 or less at 25° C.

7. The liquid detergent composition for hard surfaces according to claim 1, wherein the liquid detergent composition for hard surfaces is intended for a food processing installation or a cooking installation.

8. A method for cleaning a hard surface in which the detergent composition according to claim 1 is contacted with a hard surface stained with oil spots including a degenerated oil.

Description

EXAMPLES

Example 1, Comparative Example 1

[0143] Liquid detergent compositions for hard surfaces as shown in Table 1 were prepared using the following ingredients, and evaluated for the following items. The results are shown in Table 1. The liquid detergent compositions for hard surfaces in Table 1 were prepared by a normal method. Specifically, component (a1) or component (a1′), and component (b1) were added to an appropriate amount of ion-exchanged water, the resulting mixture was warmed and dissolved at 60° C., and then brought back to room temperature (25° C.), and sodium hydroxide and/or hydrochloric acid was added to adjust the pH (25° C.) to 7. All of the ratios (% by mass) of the ingredients in Table 1 were values based on effective contents.

<Ingredients>

Component (a1)

[0144] Myristyl dimethylamine oxide: AMPHITOL 40N (manufactured by Kao Corporation), compound of general formula (a1) in which R.sup.11a is a myristyl group, each of R.sup.12a and R.sup.13a is a methyl group, and q1=0 and p1=0.
Component (a1′) (Comparative Component for Component (a1)) [0145] Lauryl dimethylamine oxide: AMPHITOL 20N (manufactured by Kao Corporation), compound of general formula (a1) in which R.sup.11a is a lauryl group, each of R.sup.12a and R.sup.13a is a methyl group, and q1=0 and p1=0.

Component (b1)

[0146] Sorbitan trioleate: RHEODOL SP-030V (manufactured by Kao Corporation) [0147] Sorbitan monostearate: RHEODOL SP-S10V (manufactured by Kao Corporation) [0148] Sorbitan monopalmitate: RHEODOL SP-P10 (manufactured by Kao Corporation) [0149] Sorbitan monolaurate: RHEODOL SP-L10 (manufactured by Kao Corporation)

[Evaluation of Detergency Against Thermally Degenerated Oil]

[0150] Rapeseed oil (manufactured by Wako Pure Chemical Industries Co., Ltd.) was heated in stationary state at 180° C. for 8 hours to prepare a thermally degenerated oil. Each thermally degenerated oil was applied in an amount of about 1 mg/cm.sup.2 to a test piece (manufactured by Engineering Test Service, SUS 304, 1 mm×25 mm×70 mm) weighed (x) beforehand using a four-decimal-place electronic balance, and the test piece was then weighed (y) using the four-decimal-place balance.

[0151] 2 ml of each of the liquid detergent compositions for hard surfaces was sprayed in the form of foam to the coated test piece using a pump foamer (for Biore Hand Wash, manufactured by Kao Corporation), and the test piece was placed flat and left standing for 20 minutes. The test piece cleaned for 20 minutes was rinsed with tap water at 25° C. for 1 minute using a Leenerts tester (the amount of water was 700 ml and the rotation speed of the rotor was 300 rpm). After the rinsing, the test piece was dried in air overnight, and the mass of the cleaned test piece was weighed (z) with the four-decimal-place electronic balance.

[0152] The cleaning rate was determined from the equation below. The results of cleaning rates in the case of applying a thermally degenerated oil heated for 8 hours are shown in Table 1.

cleaning rate (%)={(y)−(z)}/{(y)−(x)}×100

TABLE-US-00001 TABLE 1 Example 1 1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8 Liquid Formulation (a1) Myristyl   1.00   0.50   1.75   1.50   0.90   1.00   1.00   1.00 detergent (% by mass) dimethylamine composition oxide for hard (a1′) Lauryl surfaces dimethylamine oxide (b1) Sorbitan   1.00   0.50   0.25   0.50   1.10 trioleate Sorbitan   1.00 monostearate Sorbitan   1.00 monopalmitate Sorbitan   1.00 monolaurate Water Balance Balance Balance Balance Balance Balance Balance Balance Total 100  100  100  100  100  100  100  100  pH (25° C.) 7 7 7 7 7 7 7 7 (a1)/(b1)(mass ratio)   1.0   1.0   7.0   3.0   0.8   1.0   1.0   1.0 Evaluation Cleaning rate (%) against thermally  92.8  93.7  91.1  86.6  96.5  92.8  88.6  71.4 item denatured oil (8 hours)    Comparative Example 1 1-1 1-2 1-3 1-4 Liquid detergent Formulation (a1) Myristyl dimethylamine oxide   2.00   0.50   0.25 composition for (% by mass) (a1′) Lauryl dimethylamine oxide   1.00 hard surfaces (b1) Sorbitan trioleate   1.00   1.50   0.75 Sorbitan monostearate Sorbitan monopalmitate Sorbitan monolaurate Water Balance Balance Balance Balance Total 100  100  100  100  pH (25° C.) 7 7 7 (a1)/(b1)(mass ratio) — —   0.3 Evaluation item Cleaning rate (%) against thermally denatured oil (8 hours)  69.0  57.7  13.8

Example 2 and Comparative Example 2

[0153] Liquid detergent compositions for hard surfaces as shown in Tables 2 and 3 were prepared using the following ingredients, and evaluated for the following items. The results are shown in Tables 2 and 3. The liquid detergent compositions for hard surfaces in Tables 2 and were prepared by a normal method. Specifically, component (a2), component (a2′), component (b2), component (c), other surfactants and a preservative were added to an appropriate amount of ion-exchanged water, the resulting mixture was warmed and dissolved at 60° C., and then brought back to room temperature (25° C.), and sodium hydroxide and/or hydrochloric acid was added to adjust the pH (25° C.) to 7. All of the ratios (% by mass) of the ingredients in Tables 2 and 3 were values based on effective contents.

<Ingredients>

Component (a2)

[0154] Lauryl dimethylamine oxide: AMPHITOL 20N (manufactured by Kao Corporation), compound of general formula (a2) in which R.sup.21a is a lauryl group, each of R.sup.22a and R.sup.23a is a methyl group, and q2=0 and p2=0.
Component (a2′) (Comparative Component for Component (a2)) [0155] Myristyl dimethylamine oxide: AMPHITOL 40N (manufactured by Kao Corporation), compound of general formula (a2) in which R.sup.21a is a myristyl group, each of R.sup.22a and R.sup.23a is a methyl group, and q2=0 and p2=0.

Component (b2)

[0156] Glyceride monooleate: EXCEL O-95R (manufactured by Kao Corporation) [0157] Glyceride monopalmitate: manufactured by Wako Pure Chemical Industries Co., Ltd., reagent [0158] Glyceride monolaurate: manufactured by Wako Pure Chemical Industries Co., Ltd., reagent [0159] Glyceride monocaprate: manufactured by Wako Pure Chemical Industries Co., Ltd., reagent [0160] Glyceride monostearate: manufactured by Wako Pure Chemical Industries Co., Ltd., reagent

Other Surfactants

[0161] Alkyl glycoside: MYDOL 12 (manufactured by Kao Corporation) [0162] Polyoxyethylene (12) lauryl ether: value in the parentheses is an average number of added moles of an oxyethylene group [0163] Polyoxyethylene (3) sodium lauryl sulfate: value in the parentheses is an average number of added moles of an oxyethylene group

Component (c)

[0164] BDG-NS: 2-(2-n-butoxyethoxy)ethanol, manufactured by Nippon Nyukazai Co., Ltd. [0165] MFG: 1-methoxy-2-propanol, manufactured by Nippon Nyukazai Co., Ltd. [0166] MFDG: dipropylene glycol monomethyl ether, manufactured by Nippon Nyukazai Co., Ltd. [0167] HeDG: 2-(2-hexyloxyethoxy)ethanol, manufactured by Nippon Nyukazai Co., Ltd. [0168] PhG: 2-phenoxyethanol, manufactured by Nippon Nyukazai Co., Ltd.

Other Components

[0169] Preservative 1: 5-chloro-2-methyl-4-isothiazolin-3-one, KATHON CG (100-fold dilution), manufactured by Rohm & Haas Japan K.K. [0170] Preservative 2: 1,2-benzisothiazolin-3-one, PROXEL BDN, manufactured by Lonza Japan

[Evaluation of Detergency Against Thermally Degenerated Oil]

[0171] For the liquid detergent compositions for hard surfaces as shown in Table 2, the cleaning rates of the liquid detergent compositions for hard surfaces were determined by the same method as described in evaluation of detergency against a thermally degenerated oil in Example 1 and Comparative Example 1. The results are shown in Table 2.

TABLE-US-00002 TABLE 2 Example 2 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 2-0 Liquid Formulation (a2) Lauryl   1.00   0.50   1.75   1.50   0.90   1.00   1.00   1.00   1.00 detergent (% by mass) dimethylamine composition oxide for hard (a2′) Myristyl surfaces dimethylamine oxide (b2) Glyceride   1.00   0.50   0.25   0.50   1.10 monooleate Glyceride   1.00 monopalmitate Glyderide   1.00 monolaurate Glyceride   1.00 monocaprate Glyderice   1.00 monostearate Alkyl glycoside Polyxyethylene (12) lauryl ether Polyoxyethylene (3) sodium lauryl sulfate Water Balance Balance Balance Balance Balance Balance Balance Balance Balance Total 100  100  100  100  100  100  100  100  100  pH (25° C.) 7 7 7 7 7 7 7 7 7 (a2)/(b2)(mass ratio)   1.0   1.0   7.0   3.0   0.8   1.0   1.0   1.0   1.0 ((a2)+(b2))/surfectant (% by mass) 100  100  100  100  100  100  100  100  100  Evaluation Cleaning rate (%) against denatured oil  87.0  83.3  58.6  67.5  50.1  68.3  51.0  54.6  39.2 item (8 hours)   Example 2 2-10 2-11 2-12 2-13 2-14 2-15 2-16 2-17 Liquid Formulation (a2) Lauryl   1.00   1.00   1.00   1.50   1.75   1.85   1.95   2.00 detergent (% by mass) dimethylamine composition oxide for hard (a2′) Myristyl surfaces dimethylamine oxide (b2) Glyceride   1.00   1.00   1.00   1.50   1.75   1.85   1.95   2.00 monooleate Glyceride monopalmitate Glyderide monolaurate Glyceride monocaprate Glyderice monostearate Alkyl glycoside   0.10   0.30   2.00   1.00   0.50   0.30   0.10 Polyxyethylene (12) lauryl ether Polyoxyethylene (3) sodium lauryl sulfate Water Balance Balance Balance Balance Balance Balance Balance Balance Total 100  100  100  100  100  100  100  100  pH (25° C.) 7 7 7 7 7 7 7 7 (a2)/(b2)(mass ratio)   1.0   1.0   1.0   1.0   1.0   1.0   1.0   1.0 ((a2)+(b2))/surfectant (% by mass) 95  87  50  75  88  93  98  100  Evaluation Cleaning rate (%) against denatured oil  62.8  42.2  35.6  51.7  51.8  59.5  69.7  93.0 item (8 hours)   Comparative Example 2 2-1 2-2 2-3 2-4 2-5 Liquid Formulation (a2) Lauryl dimethylamine oxide   1.00   1.00   1.00   0.50 detergent (% by mass) (a2′) Myristyl dimethylamine oxide   1.00 composition (b2) Glyceride monooleate   1.00   1.00   1.00   1.00   0.50 for hard Glyceride monopalmitate surfaces Glyderide monolaurate Glyceride monocaprate Glyderice monostearate Alkyl glycoside   14.00   5.00   3.00 Polyxyethylene (12) lauryl ether   7.00 Polyoxyethylene (3) sodium lauryl sulfate   7.00 Water Balance Balance Balance Balance Balance Total 100  100  100  100  100  pH (25° C.) 7 7 7 7 7 (a2)/(b2)(mass ratio) 0   1.0   1.0   1.0   1.0 ((a2)+(b2))/surfectant (% by mass) 50  13  13  29  25  Evaluation item Cleaning rate (%) against denatured oil (8 hours)  25.6  27.0  23.4  30.4  33.3

[Evaluation of Appearance]

[0172] A 50 mL sample bottle (No. 6 wide-mouth standard bottle made of glass and having a cylindrical shape having a diameter of 40 mm and a height of 80 mm) was filled with each of 40 mL of the liquid detergent compositions for hard surfaces in Table 3, covered with a lid, and left standing at ordinary temperature for 0.5 hours. After the bottle was left standing, the appearance of the composition was visually observed, and assessed in accordance with the following criteria. The results are shown in Table 3.

[0173] Transparent and uniform: fine particles are not visible, and the liquid is transparent.

[0174] Very slightly cloudy: fine particles are not visible, but the liquid has slightly low optical transparency.

[0175] Slightly cloudy: fine particles are not visible, but the liquid has low optical transparency.

[0176] Cloudy and separated: fine particles are visible, and the entirety of the liquid is milky-white, or separated in two phases.

[Measurement of Viscosity]

[0177] Brookfield Viscometer: Model BM (manufactured by Tokyo Keiki Inc.) equipped with a rotor of Rotor No. 1 was prepared. A viscosity measuring beaker was filled with each of the liquid detergent compositions for hard surfaces in Table 3, and the temperature was adequately adjusted in a constant temperature water bath at 25° C. The beaker containing the composition was set in the viscometer. A value after 60 seconds of measurement at a rotor speed of 60 r/min was defined as the viscosity of the composition. The results are shown in Table 3.

(3) Evaluation of Foaming Properties

[0178] 5 ml of each of the liquid detergent compositions for hard surfaces in Table 3 was sprayed in the form of foam to a vertical surface of a longitudinally placed rectangular stainless steel tray (manufactured by AS ONE Corporation, 199 mm×140 mm×18 mm) using a spray for business use (refillable spray container for business use, manufactured by Kao Corporation) (the trigger of the spray was squeezed five times). Foam quality immediately after the spraying was visually observed, and the foaming properties were evaluated according to the following assessment criteria. The results are shown in Table 3. Assessment criteria

Score 0: foaming did not occur.
Score 1: foaming occurred, and foam adhered to the vertical surface did not remain.
Score 2: foaming occurred, and part of foam adhered to the vertical surface remained.
Score 3: foaming occurred, and the entirety of foam adhered to the vertical surface remained.

TABLE-US-00003 TABLE 3 Example 2 2-18 2-19 2-20 2-21 2-22 2-23 Liquid Formulation (a2) Lauryl   7.80   7.80   7.80   7.80   7.80   7.80 detergent (% by mass) dimethylamine composition oxide for hard (b2) Glyceride   4.20   4.20   4.20   4.20   4.20   4.20 surfaces monooleate (c) MFG MFDG BDG-NS   3.00   6.00   9.00   12.00   0.30   0.50 HeDG PhG Preservative 1    0.0002    0.0002    0.0002    0.0002    0.0002    0.0002 Preservative 2   0.01   0.01   0.01   0.01   0.01   0.01 Water Balance Balance Balance Balance Balance Balance Total 100  100  100  100  100  100  (a2)/(b2) (mass ratio)   1.9   1.9   1.9   1.9   1.9   1.9 [(a2) + (b2)]/(c) (mass ratio)   4.0   2.0   1.3   1.0  40.0  24.0 pH(25° C.)   7.0   7.0   7.0   7.0   7.0   7.0 Evaluation Appearance Transparent Transparent Transparent Transparent Transparent Transparent item and uniform and uniform and uniform and uniform and uniform and uniform Viscosity (25° C.) (mPa .Math. s)  10.3   7.5   6.6   6.3 10  10  Foaming property (score) 3 3 3 3 1 2 Example 2 2-24 2-25 2-26 2-28 2-29   Liquid Formulation (a2) Lauryl   7.80   7.80   7.80   7.80   7.80 detergent (% by mass) dimethylamine composition oxide for hard (b2) Glyceride   4.20   4.20   4.20   4.20   4.20 surfaces monooleate (c) MFG   1.00 MFDG   1.00 BDG-NS   1.00 HeDG   1.00 PhG   1.00 Preservative 1    0.0002    0.0002    0.0002    0.0002    0.0002 Preservative 2   0.01   0.01   0.01   0.01   0.01 Water Balance Balance Balance Balance Balance Total 100  100  100  100  100  (a2)/(b2) (mass ratio)   1.9   1.9   1.9   1.9   1.9 [(a2) + (b2)]/(c) (mass ratio)  12.0  12.0  12.0  12.0  12.0 pH(25° C.)   7.0   7.0   7.0   7.0   7.0 Evaluation Appearance Transparent Transparent Transparent Transparent Transparent item and uniform and uniform and uniform and uniform and uniform Viscosity (25° C.) (mPa .Math. s) 10   10.3  10.3  10.3  10.3 Foaming property (score) 3 1 3 3 2

[0179] The liquid detergent compositions for hard surfaces in Table 3 had a cleaning rate of 90% or more in the evaluation of detergency against the thermally degenerated oil (8 hours), and was thus satisfactory.

[Formulation Examples]

[0180] Table 4 shows formulation examples of the liquid detergent compositions for hard surfaces according to the present invention, which contain the component (a1), component (b1) and component (c). These liquid detergent compositions for hard surfaces have a cleaning rate of 70% or more in the evaluation of detergency against the thermally degenerated oil (8 hours), and are thus satisfactory. Further, these liquid detergent compositions for hard surfaces are uniform and transparent in the appearance evaluation, have a viscosity of 10 to 40 mPa-s at 25° C., are rated as score 3 in the foaming property evaluation, and are thus satisfactory.

TABLE-US-00004 TABLE 4 Formulation examples 1 2 3 4 5 Liquid Formulation (a1) Myristyl  5.25  5.25  5.25  5.25  5.25 detergent (% by mass) dimethylamine composition oxide for hard (b1) Sorbitan  0.75  0.75  0.75  0.75  0.75 surfaces monolaurate (c) MFG  1.00 MFDG  1.00 BDG-NS  1.00 HeDG  1.00 PhG  1.00 Preservative 1   0.0002   0.0002   0.0002   0.0002   0.0002 Preservative 2  0.01  1.00  1.00  1.00  1.00 Water Balance Balance Balance Balance Balance Total 100   100   100   100   101   (a1)/(b1) (mass ratio) 7.0 7.0 7.0 7.0 7.0 [(a1) + (b1)]/(c) (mass ratio) 6.0 6.0 6.0 6.0 6.0 pH(25° C.) 7.0 7.0 7.0 7.0 7.0