DETERGENT COMPOSITION

Abstract

The present invention is a detergent composition containing (A) an anionic surfactant, (B) a nonionic surfactant and water, wherein the composition contains (A1) an anionic surfactant having a hydrocarbon group and as acid- or salt-form sulfonic acid group as component (A), and one or two or more nonionic surfactants selected from the group consisting of (B1-1) a nonionic surfactant having a linear hydrocarbon group with 8 or more and 10 or less carbons and (B1-2) a nonionic surfactant having a branched hydrocarbon group with 8 or more and 22 or less carbons as component (B).

Claims

1. A detergent composition comprising (A) an anionic surfactant [hereinafter referred to as component (A)], (B) a nonionic surfactant [hereinafter referred to as component (B)] and water, wherein the composition comprises (A1) an anionic surfactant having a hydrocarbon group and an acid- or salt-form sulfonic acid group [hereinafter referred to as component (A1)] as the component (A), and one or more nonionic surfactants [hereinafter referred to as component (B1)] selected from the group consisting of (B1-1) a nonionic surfactant having a linear hydrocarbon group with 8 or more and 10 or less carbons [hereinafter referred to as component (B1-1)] and (B1-2) a nonionic surfactant having a branched hydrocarbon group with 8 or more and 22 or less carbons [hereinafter referred to as component (B1-2)] as the component (B).

2. The detergent composition according to claim 1, wherein the component (A1) is one or more anionic surfactants selected from the group consisting of an internal olefin sulfonate salt, an alkylbenzene sulfonate salt, an alpha-sulfo fatty acid ester salt and a dialkyl sulfosuccinate salt.

3. The detergent composition according to claim 1, wherein the composition comprises an internal olefin sulfonate salt as the component (A1).

4. The detergent composition according to claim 1, wherein the composition comprises an internal olefin sulfonate salt having a hydrocarbon group with 18 carbons as the component (A1).

5. The detergent composition according to claim 1, wherein a proportion of the component (A1) in the component (A) is 30 mass % or more and 100 mass % or less.

6. The detergent composition according to claim 1, wherein the component (B1) is a nonionic surfactant with an HLB of 11.5 or more and 15.4 or less.

7. The detergent composition according to claim 1, wherein the component (B1-1) is a polyoxyalkylene decyl ether.

8. The detergent composition according to claim 1, wherein the component (B1-2) is an alkylene oxide adduct of a Guerbet alcohol with 10 carbons.

9. The detergent composition according to claim 1, wherein a proportion of the component (B1) in the component (B) is 30 mass % or more and 100 mass % or less.

10. The detergent composition according to claim 1, wherein the composition comprises a nonionic surfactant other than the component (B1) as the component (B).

11. The detergent composition according to claim 1, wherein the composition comprises the component (A1) in an amount of 0.01 mass % or more and 70 mass % or less.

12. The detergent composition according to claim 1, wherein the composition comprises the component (B1) in an amount of 0.01 mass % or more and 70 mass % or less.

13. The detergent composition according to claim 1, wherein a mass ratio of the content of the component (A1) to the content of the component (B1), (A1)/(B 1), is 0.1 or more and 10 or less.

14. The detergent composition according to claim 1, adapted for use in textile products.

15. A method for washing a textile product comprising, washing the textile product with a detergent liquid obtained by mixing the detergent composition according to claim 1 and water, and thereafter rinsing the textile product with water.

16. The method for washing a textile product according to claim 15, wherein the water mixed with the detergent composition and the water used for rinsing each have a hardness of 1° dH or more and 30° dH or less.

17. The method for washing a textile product according to claim 15, wherein a mass ratio of the content of the component (A1) to the content of the component (B1) in the detergent liquid, (A1)/(B1), is 0.1 or more and 10 or less.

18. The method for washing a textile product according to claim 15, wherein a bath ratio is 2 or more and 45 or less.

19. The method for washing a textile product according to claim 15, wherein the textile product is washed in a rotary washing machine.

Description

EXAMPLES

[1] Evaluation of Detergency

<Washing Test>

(Washing Step)

[0168] A washing operation was performed using a tergotometer (manufactured by Ueshima Seisakusho Co., Ltd., MS-8210). As water used for washing, deionized water to which calcium chloride and magnesium chloride were added in proportions of 2:1 by mass ratio in different concentrations to adjust the hardness to 5, 10, 15 and 20° dH (hereinafter referred to as adjusted water) was used. Each of the detergent compositions listed in Tables 1 and 2 was mixed with each adjusted water above to obtain a detergent liquid containing active components of the detergent composition in a concentration of 0.15 mass %. In a 1-liter stainless beaker for washing tests, 0.6 L of the detergent liquid and four pieces of sebum/pigment mixture-soiled cotton cloth (manufactured by WFK, WFK10D) cut into 6 cm×6 cm squares were placed. Pieces of cotton cloth (knitted cotton cloth manufactured by Tanigashira-Shoten corporation) cut into 6 cm×6 cm squares were added to adjust the bath ratio to 20. Washing was carried out at 85 rpm for 10 minutes with the detergent liquid whose temperature was set to 40° C.

(Rinsing Step and Drying Step)

[0169] After washed, the pieces of cloth were rinsed for 30 seconds with adjusted water having the same hardness as the adjusted water used to prepare the detergent liquid under the same conditions as those in the washing step except for the absence of the detergent composition and the time, thereafter dewatered, and dried with an ironing press machine.

<Method for Evaluating Washing Rate>

[0170] The washing rates of the four pieces of sebum/pigment mixture-soiled cotton cloth obtained in the above washing test were each measured by the following method, and the average value thereof was determined.

[0171] The reflectance at 550 nm of the original cloth before soiling (manufactured by WFK, WFK10A) and before and after washing was measured with a colorimeter (manufactured by NIPPON DENSHOKU INDUSTRIES CO., LTD., Z-300A), and the washing rate (%) was determined by the following formula. The values in Tables 1 and 2 are the average values of the washing rates of four pieces.

[0172] The washing rates (%) of four pieces were each measured by the following method, and the average values thereof were determined. The results are shown in Tables 1 and 2.

Washing rate (%)=100×[(reflectance after washing−reflectance before washing)/(reflectance of original cloth−reflectance before washing)]

[2] Evaluation of Softness

<Pretreatment of Softness Evaluation Fibers>

[0173] 1.7 kg of cotton towels (manufactured by Takei Towel Corporation, cotton 100%, No. 3700) was washed in the standard course of a fully automatic washing machine (manufactured by Panasonic Corporation, NA-F702P) (adding 5.0 g of EMULGEN 108 (manufactured by Kao Corporation) as a detergent during washing, in 47 L of water, washed for 12 minutes and rinsed twice, and dewatered for 3 minutes) twice in a cumulative manner, thereafter washed in the standard course with tap water alone (in 47 L of water, washed for 12 minutes and rinsed twice, and dewatered for 3 minutes) three times in a cumulative manner, and dried for 24 hours under an environment of 23° C. and 45% RH to obtain pretreated towels.

<Washing of Softness Evaluation Fibers>

[0174] The fibers to be evaluated were washed in an electric bucket washing machine (manufactured by Panasonic Corporation, N-BK2). As water used for washing, deionized water to which calcium chloride and magnesium chloride were added in proportions of 2:1 by mass ratio to adjust the hardness to 10° dH was used. Each of the detergent compositions listed in Tables 1 and 2 was mixed with the above washing water to obtain a detergent liquid containing the detergent composition in a concentration of 0.15 mass %. 4 L of the detergent liquid and three of the above pretreated towels (manufactured by Takei Towel Corporation, cotton 100%, No. 3700) were placed in a 6-liter washing bucket, and the bath ratio was adjusted to 20. The water flow was set to the standard one, with which washing was carried out for 10 minutes. After washing, dewatering was carried out for three minutes in a two-tank washing machine (manufactured by Hitachi, Ltd., PS-H35L). An operation including pouring 4.0 L of the above washing water into the above bucket washing machine again, placing the dewatered towels therein, rinsing them for three minutes, and then dewatering them for three minutes in the two-tank washing machine was repeated twice. After dewatered, they were left alone and dried for 12 hours under the conditions of 20° C. and 43% RH to obtain washed towels.

<Evaluation of Softness>

[0175] Two persons skilled in textures of fibers gave marks to each of the washed towels in softness and scrooping feelings according to the following criteria, and the average of those given by the two was calculated. The results are shown in Tables 1 and 2.

[0176] −1 . . . the finished cotton towel is not softer than that treated with the composition of comparative example 1

[0177] 0 . . . the finished cotton towel is as soft as that treated with the composition of comparative example 1

[0178] 1 . . . the finished cotton towel is slightly softer than that treated with the composition of comparative example 1

[0179] 2 . . . the finished cotton towel is softer than that treated with the composition of comparative example 1

[0180] 3 . . . the finished cotton towel is much softer than that treated with the composition of comparative example 1

[3] Evaluation of Low-Temperature Stability

[0181] 10 ml of each detergent composition was put into a Maruemu screw bottle (No. 4) and placed in a constant temperature chamber at 0° C. for three days, and after that, the presence or absence of precipitates was visually observed. In the tables, “Good” means that no precipitates were observed.

TABLE-US-00001 TABLE 1 Comparative Example example 1 1 Liquid Formulation (A) (A1) A1-1 5.77 9.01 detergent amount (B) (B1) (B1-2) B1-2-1 5.00 — composition (mass %) (B2) B2-1 1.60 — Water Balance Balance Total 100 100 Proportion of (A1) in (A) (mass %) 100 100 Proportion of (B1) in (B) (mass %) 75.8 — Washing  5° DH 48.6 42.4 rate 10° DH 38.0 24.3 (%) 15° DH 35.8 23.6 20° DH 31.3 21.1 Softness 2.5 0 Scrooping feeling None None Storage stability Good Turbid

TABLE-US-00002 TABLE 2 Comparative Example example 2 3 4 5 6 2 3 Liquid Formulation (A) (A1) A1-2 5.77 5.77 5.77 5.77 4.77 9.37 9.01 detergent amount A1-3 — — — — 1.00 — — composition (mass %) (B) (B1) (B1-1) B1-1-1 5.00 6.60 — — — — — (B1-2) B1-2-1 — — 6.60 5.00 5.00 — — (B2) B2-1 1.60 — — 1.60 1.60 2.60 — Water Balance Balance Balance Balance Balance Balance Balance Total 100 100 100 100 100 100 100 Proportion of (A1) in (A) (mass %) 100 100 100 100 100 100 100 Proportion of (B1) in (B) (mass %) 75.8 100 100 75.8 75.8 — 100 Washing  5° DH 45.8 48.2 44.3 45.1 46.3 34.0 43.4 rate 10° DH 32.8 34.1 35.9 34.0 37.2 29.0 25.7 (%) 15° DH 33.2 42.5 39.4 37.8 42.8 36.0 25.4 20° DH 34.6 32.3 29.5 36.4 40.3 34.6 27.4 Softness 2.5 1.5 1.5 2.5 2.0 0 0 Scrooping feeling None None None None None None None Storage stability Good Good Good Good Good Turbid Turbid

[0182] The components in the tables are listed below. The mass percentage of component (A1) is based on the amount of an acid-form compound of component (A1). [0183] A1-1: a sodium internal olefin sulfonate with 18 carbons, in which the content of a sodium internal olefin sulfonate with a sulfonic acid group present at position 2 was 28.4 mass %, the content of an olefin sulfonate salt having a double bond at the end of the carbon chain was 2.4 mass %, and the mass ratio of hydroxy species/olefin species was 80/20. Further, in A1-1, the content of a raw material internal olefin was 2.1 mass % and that of an inorganic compound was 2.3 mass %. A1-1 can be produced, for example, by the following method of production example 1.

Production Example 1 (Production of Sodium Internal Olefin Sulfonate with 18 Carbons)

[0184] 7000 parts by mass of 1-octadecanol (manufactured by Kao Corporation, “KALCOL 8098”) and 700 parts by mass of γ-alumina (manufactured by Strem Chemicals, Inc.) as a catalyst are prepared in a flask with a stirrer and a reaction is carried out under stirring at 280° C. with nitrogen flowing through the system to obtain a crude internal olefin. The crude internal olefin is distilled at 148-158° C. and 0.5 mmHg to obtain an internal olefin with 18 carbons having an olefin purity of 100%. The internal olefin and a sulfur trioxide gas with an SO.sub.3 concentration of 2.8 volume % are flowed through a thin-film sulfonation reactor at a reaction molar ratio (SO.sub.3/internal olefin) of 1.005 to carry out a sulfonation reaction.

[0185] The resultant sulfonated product is neutralized with an aqueous solution prepared from sodium hydroxide in an amount 1.05 molar times a theoretical acid value for 1 hour at 30° C. The neutralized product is hydrolyzed by heating for 1 hour in an autoclave at 170° C. to produce a sodium internal olefin sulfonate with 18 carbons. [0186] A1-2: a potassium internal olefin sulfonate with 18 carbons, in which the content of a potassium internal olefin sulfonate with a sulfonic acid group present at position 2 was 16.0 mass % and the mass ratio of hydroxy species/olefin species was 80/20. [0187] A1-3: a sodium dodecylbenzene sulfonate, product name: NEOPELEX G-25, manufactured by Kao Corporation [0188] B1-1-1: a nonionic surfactant with an HLB of 13.3 obtained by adding an average of 7 moles of ethylene oxide to a linear alcohol with 10 carbons [0189] B1-2-1: a nonionic surfactant with an HLB of 14.3 obtained by adding an average of 9 moles of ethylene oxide to a Guerbet alcohol with 10 carbons [0190] B2-1: a nonionic surfactant with an HLB of 16.6 obtained by adding an average of 21 moles of ethylene oxide to a linear primary alcohol with 12 carbons