Liquid detergent composition for tableware and/or kitchen hard articles

Abstract

The present invention is a liquid detergent composition for tableware and/or kitchen hard articles containing: (a) a nonionic surfactant with an HLB of 10.5 or less; (b) a surfactant selected from amine oxide-type surfactants, amphoteric surfactants, and nonionic surfactants with an HLB of 11 or more; and (c) an organic solvent with a log Pow of 0 or more and 1.5 or less, wherein a proportion of component (a) in all surfactants is 30 mass % or more and 85 mass % or less, a mass ratio of the content of (c) to the content of (a), (c)/(a), is 1 or more and 10 or less, and a viscosity at 20° C. is 20 mPa.Math.s or less.

Claims

1. A liquid detergent composition for tableware and/or kitchen hard articles comprising: (a) a nonionic surfactant with an HLB of 10.5 or less [hereinafter, referred to as component (a)]; (b) a surfactant selected from amine oxide-type surfactants, amphoteric surfactants, and nonionic surfactants with an HLB of 11 or more [hereinafter, referred to as component (b)]; and (c) an organic solvent with a log Pow of 0 or more and 1.5 or less [hereinafter, referred to as component (c)], wherein a proportion of the component (a) in all surfactants is 30 mass % or more and 85 mass % or less, a mass ratio of the content of the component (c) to the content of the component (a), (c)/(a), is 1 or more and 10 or less, and a viscosity at 20° C. is 20 mPa.Math.s or less.

2. The liquid detergent composition for tableware and/or kitchen hard articles according to claim 1, wherein a mass ratio of the content of the component (a) to the content of the component (b), (a)/(b), is 0.5 or more and 10 or less.

3. The liquid detergent composition for tableware and/or kitchen hard articles according to claim 1, wherein the component (a) is one or more nonionic surfactants selected from: (a1) polyoxyalkylene-type nonionic surfactants with an HLB of 10.5 or less, which are nonionic surfactants in which, on average, 1 or more and 5 or less moles of an alkylene oxide with 2 or 3 carbons is added to an aliphatic alcohol with 8 or more and 18 or less carbons or to a lower alcohol ester of a fatty acid with 8 or more and 18 or less carbons (the number of carbons of the lower alcohol is 1 or more and 3 or less); (a2) polyhydric alcohol ester-type nonionic surfactants consisting of an ester with an HLB of 10.5 or less, wherein the ester is of a polyhydric alcohol having 2 or more and 10 or less hydroxy groups and a fatty acid with 8 or more and 18 or less carbons; (a3) alkanol amide-type nonionic surfactants with an HLB of 10.5 or less, which are a mono- or di-alkanol amide having an alkanoyl group with 8 or more and 18 or less carbons (the number of carbons of the alkanol group is 2 or 3), or an alkylene oxide adduct thereof (the number of carbons of the alkylene oxide is 2 or 3 and the average number of added moles thereof is more than 0 and 4 or less); and (a4) nonionic surfactants with an HLB of 10.5 or less, which are an adduct of an alkylene oxide with 2 or 3 carbons to an amine having a hydrocarbon group with 8 or more and 18 or less carbons.

4. A method for washing tableware and/or kitchen hard articles comprising bringing the liquid detergent composition for tableware and/or kitchen hard articles according to claim 1 into contact, in a state of foam, with tableware and/or kitchen hard articles to which a stain containing a liquid oil derived from food is adhered.

5. The method for washing tableware and/or kitchen hard articles according to claim 4, wherein said liquid detergent composition for tableware and/or kitchen hard articles is brought into contact, in a state of foam with a specific foam volume of 1 ml/g or more and 100 ml/g or less, with tableware and/or kitchen hard articles to which a stain containing a liquid oil derived from food is adhered.

6. The method for washing tableware and/or kitchen hard articles according to claim 4, comprising, after bringing into contact with said tableware and/or kitchen hard articles in said state of foam, leaving said detergent composition without applying an external force.

7. The method for washing tableware and/or kitchen hard articles according to claim 4, comprising, after bringing into contact with said tableware and/or kitchen hard articles in said state of foam, leaving said detergent composition without applying an external force, and thereafter rinsing said tableware and/or kitchen hard articles with water.

8. The method for washing tableware and/or kitchen hard articles according to claim 4, wherein the tableware and/or kitchen hard articles are made of plastic.

Description

EXAMPLES

(1) Using the following formulation components, liquid detergent compositions shown in Tables 1 through 4 were prepared and evaluations of the following items were performed on them. The results are shown in Tables 1 through 4. Note that the liquid detergent compositions shown in Tables 1 through 4 were adjusted to have pH 7 (20° C.) by citric acid and a 48% NaOH aqueous solution. In addition, mass % of formulation components in Tables 1 through 4 are all numerical values based on the active components. Further, the content of “all surfactants” in the tables is the total content of components (a), (b) and (d). Moreover, the compositions of Tables 1 through 4 are liquid detergent compositions for tableware and/or kitchen hard articles.

(2) *Formulation Components

(3) Component (a)

(4) a-1: polyoxyethylene alkyl ether, the number of carbons of the alkyl group: 13, the average number of added moles of the ethylene oxide: 3 (HLB: 8.6), SOFTANOL 33, NIPPON SHOKUBAI CO., LTD. a-2: sorbitan monolaurate (HLB: 8.6), EMASOL L-10V, Kao Corporation a-3: glyceryl monolaurate (HLB: 5.3), LKT Laboratories, Inc. a-4: palm kernel oil fatty acid diethanolamide (HLB: 5.5, the HLB is a value determined by the aforementioned experimental method), AMINON PK-02S, Kao Corporation a-5: N-lauryl-N,N-diethanolamine (HLB: 6.3, the HLB is a value determined by the aforementioned experimental method), AMIET 102, Kao Corporation
Component (b) b-1: N-dodecyl-N,N-dimethylamine oxide, AMPHITOL 20N, Kao Corporation b-2: N-dodecyl-N,N-dimethyl-N-(2-hydroxysulfopropyl)sulfobetaine, AMPHITOL 20HD, Kao Corporation b-3: polyoxyethylene alkyl ether, the number of carbons of the alkyl group: 13, the average number of added moles of the ethylene oxide: 7 (HLB: 12.1), SOFTANOL 70H, NIPPON SHOKUBAI CO., LTD.
Component (c) c-1: diethylene glycol monobutyl ether (log Pow: 0.66) c-2: ethanol (log Pow: 0.07) c-3: triethylene glycol monobutyl ether (log Pow: 0.92)
Component (c) (a Comparative Compound of Component (c)) c′-1: ethylene glycol (log Pow: −1.4)
Component (d) (Other Surfactants) d-1: sodium polyoxyethylene alkyl ether sulfate, the number of carbons of the alkyl group: 12 to 16, the average number of added moles of the ethylene oxide: 4.0 (the product name “ES-4K,” manufactured by Kao Corporation)
Component (e1) e-1: dodecane (log Pow: 5.51)
(1) Viscosity

(5) A B-type viscometer model BM manufactured by TOKIMEC INC. equipped with a rotor of a rotor number No. 1 was prepared. A liquid detergent composition of the tables was filled into a beaker for measuring the viscosity, and the temperature was fully adjusted in a thermostatic water bath at 20° C. A value of 60 seconds later, which was measured by placing the beaker containing the composition on the viscometer and setting the number of revolutions of the rotor for 60 r/min, was used as the viscosity of the composition.

(6) (2) Specific Foam Volume

(7) The liquid detergent composition was filled into a trigger-type spray container (Cucute clear foam spray, manufactured by Kao Corporation) and sprayed into a 200 mL measuring cylinder (an inner diameter of 40 mm) for 3 to 10 times. A mass of the 200 mL measuring cylinder after the spraying was measured with a 4-digit balance, and a difference with a mass of the measuring cylinder before the spraying was taken as (a) a foam applying amount (g). Foam volumes (mL) within the measuring cylinder immediately after the discharge and 1 minute after the discharge were visually read. The foam volume (mL) immediately after the discharge was taken as (b) and the foam volume (mL) 1 minute after the discharge was taken as (b′). The specific foam volumes were calculated by the following formula. The larger the specific foam volume is, the more excellent the foam discharge performance is.
Specific Foam Volume (mL/g)=[(b) or (b′)]/(a)
(3) Evaluation of Detergency

(8) The mass of a polypropylene test piece of 75 mm (width)×100 mm (length)×1 mm (thickness) was measured with a 4-digit balance (x). One side of the polypropylene test piece was evenly coated with rapeseed oil in an applying amount of 0.08 to 0.12 g to prepare a stained piece. The mass of the stained piece was measured with a 4-digit balance (y). The liquid detergent composition was filled into the trigger-type spray container (Cucute clear foam spray, manufactured by Kao Corporation) and sprayed to the stained piece for 5 times. The composition was discharged in a foamy state. The discharge amount of the composition was about 3 g in total.

(9) The stained piece was kept in contact with the discharged foam for 1 minute and thereafter rinsed under running water for 15 seconds. At that time, the entire portion to which the stain was adhered in the stained piece was brought into contact with the foam. Under this condition, the liquid detergent composition of the examples was brought into contact in a state of foam with a specific foam volume of 2.6 to 48.7 mL/g. Note that, as to the specific foam volume used herein, the specific foam volume (immediately thereafter) measured by the aforementioned method was taken as the specific foam volume of the foam brought into contact. In addition, as to the conditions of the rinsing under running water, the temperature of tap water was 25° C., the flow rate was about 4 L/min, and the diameter of an opening of a faucet was about 15 mm. The stained piece was held to form an angle of 45° relative to tap water dropped to the stained piece located perpendicularly underneath the opening by 5 cm; while the angle was kept constant, running water was received with an upper portion of the stained piece to which the stain was not adhered; and, with tap water running on the stained piece, the entire one side as the portion to be washed was rinsed. After the rinsing was finished, the stained piece was dried, and thereafter, the mass was measured with a 4-digit balance (z). A washing rate was determined by the following formula. For the washing rate, a larger numerical value is preferable.
Washing rate(%)={(y)−(z)}/{(y)−(x)}×100

(10) TABLE-US-00001 TABLE 1 Comparative Comparative Example example Example example 1 2 3 1 2 4 5 6 3 4 Liquid Formulation (a) a-1 (HLB: 8.6) 3 2 4 5.5 0.5 3 3 3 3 3 detergent component a-2 (HLB: 8.6) com- (mass %) a-3 (HLB: 5.3) position a-4 (HLB: 5.5) a-5 (HLB: 6.3) (b) b-1 b-2 3 4 2 0.5 5.5 3 3 3 3 3 b-3 (c) c-1 (logPow: 0.66) 6 4 8 11 1 4 10 20 2 35 c-2 (logPow: 0.07) c-3 (logPow: 0.92) (c′) c′-1 (logPow: −1.4) (d) d-1 Ion exchange water Bal- Bal- Bal- Bal- Bal- Bal- Bal- Bal- Bal- Bal- ance ance ance ance ance ance ance ance ance ance Total 100 100 100 100 100 100 100 100 100 100 (c)/(a) (mass ratio) 2.0 2.0 2.0 2.0 2.0 1.3 3.3 6.7 0.67 11.7 (a)/(b) (mass ratio) 1.0 0.5 2.0 11.0 0.91 1.0 1.0 1.0 1.0 1.0 Proportion of component (a) 50.0 33.3 66.7 91.7 8.3 50.0 50.0 50.0 50.0 50.0 in all surfactants (mass %) Proportion of component (a) and 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 (b) in all surfactants (mass %) pH (20° C.) 7 7 7 7 7 7 7 7 7 7 Viscosity (mPa .Math. s/20° C.) 2.35 2 2.88 —※ 1.46 3.25 2.36 3.41 —※ 1.46 Specific foam volume Immediately 33.7 47.2 20.3 canot be 48.7 27.6 36.8 20.3 canot be 4.6 thereafter (ml/g) measured measured 1 minute later 7.1 36.2 6.8 canot be 47.7 4.1 4.0 2.3 canot be 1.3 (ml/g) measured measured Washing rate (%) 78.8 62.5 91.8 —※ 16.9 85.1 76.5 70.3 —※ 51.9 *separated at the time of formulation and therefore not evaluated (the same applies hereinafter).

(11) TABLE-US-00002 TABLE 2 Comparative Example example 7 8 9 10 11 12 13 14 5 Liquid Formulation (a) a-1 (HLB: 8.6) 3 3 3 3 3 detergent component a-2 (HLB: 8.6) 3 composition (mass %) a-3 (HLB: 5.3) 3 a-4 (HLB: 5.5) 3 a-5 (HLB: 6.3) 3 (b) b-1 3 b-2 3 3 3 3 3 3 3 b-3 3 (c) c-1 (logPow: 0.66) 6 6 6 6 6 8 c-2 (logPow: 0.07) 13 c-3 (logPow: 0.92) 3.5 (c′) c′-1 (logPow: −1.4) 10 (d) d-1 Ion exchange water Balance Balance Balance Balance Balance Balance Balance Balance Balance Total 100 100 100 100 100 100 100 100 100 (c)/(a) (mass ratio) 2.0 2.0 2.0 2.0 2.0 2.7 4.3 1.2 0.0 (a)/(b) (mass ratio) 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Proportion of component (a) 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 50.0 in all surfactants (mass %) Proportion of component (a) and 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 (b) in all surfactants (mass %) pH (20° C.) 7 7 7 7 7 7 7 7 7 Viscosity (mPa .Math. s/20° C.) 2.2 2.34 2.1 2.2 2.7 3.1 2.5 3.6 —※ Specific foam volume Immediately 25.4 38.3 44.0 45.2 45.5 5.9 2.6 10.7 33.7 thereafter (ml/g) 1 minute 13.4 35.9 40.2 43.2 40.2 3.4 1.3 5.3 7.1 later (ml/g) Washing rate (%) 63.3 78.1 70.3 64.7 67.2 93.3 94.1 87.8 —※

(12) TABLE-US-00003 TABLE 2 Comparative Example example 15 16 17 6 Liquid Formulation (a) a-1 (HLB: 8.6) 3 2 2.5 3 detergent component a-2 (HLB: 8.6) composition (mass %) a-3 (HLB: 5.3) a-4 (HLB: 5.5) a-5 (HLB: 6.3) (b) b-1 b-2 3 2 2.5 3 b-3 (c) c-1 (logPow: 0.66) 6 4 4 6 c-2 (logPow: 0.07) c-3 (logPow: 0.92) (c′) c′-1 (logPow: −1.4) (d) d-1 2 2 1 8 Ion exchange water Balance Balance Balance Balance Total 100 100 100 100 (c)/(a) (mass ratio) 2.0 2.0 1.6 2.0 (a)/(b) (mass ratio) 1.0 1.0 1.0 1.0 Proportion of component (a) 37.5 33.3 41.7 21.4 in all surfactants (mass %) Proportion of component (a) and 75.0 66.7 83.3 42.9 (b) in all surfactants (mass %) pH (20° C.) 7 7 7 7 Viscosity (mPa .Math. s/20° C.) 3.59 2.61 4.41 2.36 Specific foam volume Immediately thereafter (ml/g) 35.1 25.2 25.7 20.9 1 minute later (ml/g) 32.2 23.7 21.3 20.3 Washing rate (%) 73.9 65.8 81 36.4

(13) TABLE-US-00004 TABLE 4 Comparative example Example 7 18 Liquid Formulation (a) a-1 (HLB:8.6) 3 3 detergent component (b) b-2 3 3 composition (mass %) (c) c-1 (logPow:0.66) 6 (e1) e-1 (logPow:5.51) 6 0.6 Ion exchange water Balance Balance Total 100 100 (c)/(a) (mass ratio) 0 2.0 (a)/(b) (mass ratio) 1.0 1.0 Proportion of component (a) 50.0 50.0 in all surfactants (mass %) Proportion of components (a) and (b) 100.0 100.0 in all surfactants (mass %) pH (20° C.) 7 7 Viscosity (mPa .Math. s/20° C.) 2.55 2.32 Specific foam Immediately thereafter 0.0 26.6 volume (mPg) 1 minute later (mPg) 0.0 3.5 Washing rate (%) 43.5 89.9