JP2002053894A - Liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid neutral detergent composition which does not have the problems of thickening and gelation, has an excellent washing power, and can be applied to fiber products using delicate fibers. SOLUTION: This liquid detergent composition comprising (a) a specific alkylene oxide addition type nonionic surfactant in a specified amount, (b) a specific alkylene oxide addition type nonionic surfactant in a specified amount, (c) a water-soluble silicone and (d) water, and having a pH value of 6 to 8 at 20 deg.C, wherein the total amount of the nonionic surfactants including the nonionic surfactants (a) and (b) is >=60 wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid detergent composition for washing textile products such as clothes using a delicate textile material.

[0002]

BACKGROUND OF THE INVENTION Polyoxyethylene type nonionic surfactants have high detergency and compatibility with other ionic surfactants and compounding ingredients.
However, there is a problem that the nonionic surfactant thickens as the concentration increases and further gels. There is also an increasing demand for easy washing of textile products using delicate fiber materials at home. Therefore, there is a demand for the development of a compact liquid neutral detergent composition which has no problem of thickening or gelation, is excellent in detergency, and can be applied to a fiber product using a delicate fiber material.

[0003]

[In the formula, R ¹ represents an alkyl group or alkenyl group having an average carbon number of 10 to 14, R ² represents an alkyl group having an average carbon number of 10 to 14, EO represents an oxyethylene group, and PO represents an oxypropylene group. .. o, p, q, m, and n are average addition mole numbers, and o>0, q>0, p=1 to 4.5, m=4 to 8, n=5 to 12, and 1≦(n /M)≦2. ]

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION In the general formula (I), it is preferable that o+q is 4 to 20, p is 1 to 4 and q is 2 to 5. If the PO average number of moles of addition p is 1 or more, the viscosity of the high-concentration aqueous surfactant solution is low, and gelation can be suppressed. If it is 4 or less, the biodegradability is good and the washability is excellent.

In the general formula (II), EO and PO
When the ratio n/m of the average number of added moles of 1 is 1 or more, thickening and gelation can be suppressed, and when it is 2 or less, the water solubility is good and the formulation becomes easy.

The nonionic surfactants represented by the general formulas (I) and (II) are synthesized by a known method. That is, the nonionic surfactant of the general formula (I) is obtained by adding ethylene oxide (EO), propylene oxide (PO), EO to an alcohol having an alkyl group or an alkenyl group of R ¹ derived from a synthetic higher alcohol or a natural oil or fat. It is synthesized by adding these in the order of. In addition, the general formula (II)
Similarly, the nonionic surfactants of E are added to alcohols having an alkyl group of R ² derived from synthetic or natural fats and oils.
It is synthesized by adding these in the order of O and PO.

The liquid detergent composition of the present invention contains the nonionic surfactant (a) in an amount of 20 to 60% by weight, preferably 25 to 60% by weight.
55% by weight, more preferably 30 to 50% by weight. Further, the nonionic surfactant (b) is contained in an amount of 10 to 40% by weight, preferably 10 to 35% by weight, more preferably 15%.
-30% by weight.

In the present invention, a nonionic surfactant other than the nonionic surfactants (a) and (b) can be used, and the nonionic surfactant (a),
The content of the nonionic surfactant containing (b) is 60% by weight.
It is above, preferably 60 to 90% by weight, more preferably 60 to 85% by weight. Other nonionic surfactants are preferably polyoxyethylene alkyl (carbon number 12 to 14) ether having an EO average addition mole number of 4 to 7.

In the present invention, the water-soluble silicone (c) is blended for the purpose of preventing excessive friction between fibers when washing a delicate fiber product. Examples of such water-soluble silicones include amino-modified silicone, epoxy-modified silicone, polyether (polyoxyethylene, polyoxyethylene/polyoxypropylene, etc.)-modified silicone,
Examples thereof include amide polyether-modified silicone and carboxypolyether-modified silicone, and from the viewpoint of no change in texture due to accumulation on fibers, polyether-modified silicone such as polyoxyethylene and polyoxyethylene/polyoxypropylene is preferable, and particularly, Polyoxyethylene modified silicone is preferred. Here, “water-soluble” means that the cloud point of a 1% aqueous solution of silicone is 30° C. or higher. The liquid detergent composition of the present invention contains 1% of these water-soluble silicones (c) from the viewpoint of fiber protection effect and economical efficiency.
10 to 10% by weight, more preferably 1.5 to 5% by weight.

The liquid detergent composition of the present invention comprises the above (a) to
It comprises the component (c), an optional component to be blended as necessary, and the balance water (d). The liquid detergent composition of the present invention has a liquidity of 6 to 8 from the viewpoint of preventing fiber deterioration.
And neutral is preferred.

[0011]

EFFECTS OF THE INVENTION According to the present invention, a compacted liquid detergent composition having excellent detergency and applicable to delicate textiles can be obtained.

[0012]

Example 1 A liquid detergent composition comprising the components shown in Table 1 was prepared.
In each case, the pH was adjusted to fall within the range of 6-8. However, the pH of the comparative product 4 is 10.5. The following tests were conducted using these compositions. The results are shown in Table 1. In addition, Table 1 also shows the viscosities at 20° C. of each composition measured by a B-type viscometer. The viscosity was evaluated as ◯ when it was less than 500 mPa·s, as Δ when it was 500 mPa·s or more, as Δ when it was less than 2000 mPa·s, and as x when it was 2000 mPa·s or more. The viscosity of the product 1 of the present invention in Table 1 was 150 mPa·s.

<Washing Treatment> 30 liters of tap water at 25° C. is put into a two-layer washing machine (Galaxy VH-360S1 manufactured by Toshiba Corporation) to dissolve 15 g of the composition shown in Table 1. 1 kg of cotton cloth sewn with a wet artificially contaminated cloth [Japan Society for Washing Science]
And a piece of wool flannel cloth (25 cm x 25 cm) in a washing tub, "wash" for 5 minutes, "rinse" in weak running water mode.
Washing was carried out for 2 minutes under the condition of "dewatering" for 15 seconds, and the washing rate and the shrinkage rate of the wool furano cloth were obtained by the following methods.

(1) Washing rate The reflectance (RB) of the artificially contaminated cloth before washing is measured in advance, and the reflectance (R0) of the cotton cloth (base cloth) before sewing the contaminated cloth is measured.
And the washing rate from the reflectance (RA) of the artificially contaminated cloth after washing, the washing rate (%)=(RA−RB)/(R0−RB)×
I asked for 100. Each reflectance was measured at a wavelength of 550 nm with a reflectance meter (Nippon Denshoku Co., Ltd., 300A type).

(2) Shrinkage of Wool Furano Cloth Shrinkage of Wool Furano Cloth after Washing (Apparent Shrinkage)
And wool furano cloth soaked only in water (3
The shrinkage rate (relaxation shrinkage rate) after the immersion for 0 minutes is measured based on JIS L 1042 (1992), and the net shrinkage rate is calculated by (apparent shrinkage rate)-(relaxation shrinkage rate), This is shown in Table 1. The marking method of the wool furano cloth conforms to JIS L 1042 (1992) Fig. 1, and the standard condition of the test room is a temperature of 20°C and a humidity of 65R.
It was set to H%. In addition, the wool furano cloth after the dipping treatment was naturally dried in the spread state without dehydration, and the humidity was adjusted in the standard state.

[0016]

[Table 1]

(Note) Demol EP: diisobutylene-sodium maleate copolymer (manufactured by Kao Corporation) Silicone 1: Silicone BY16-891 (amide modified silicone, manufactured by Toray Dow Corning) Silicone 2: Silicone SH3771M (polyether-modified silicone, manufactured by Toray Dow Corning)-Details of the nonionic surfactant are shown in Tables 2 to 4 below.

[0018]

[Table 2]

[0019]

[Table 3]

[0020]

[Table 4]

Example 2 With the composition of the invention product 2 and the comparative product 4 in Table 1 of Example 1, 40 cm×40 cm of wool doskin cloth was prepared in Example 1.
The cumulative washing was performed 10 times under the washing conditions of. After the final wash
The wool dough skin was naturally dried in a flat basket and conditioned in the standard environment of Example 1 for 1 day. This cloth is JIS L100
1 5.12A method Elemendorff fabric tester EL6400
The tear strength was measured using a mold (Daiei Kagaku Seiki Seisakusho Co., Ltd.).
The product washed with Comparative product 4 weighed 2470 g on average. In addition, the tear strength of the original cloth not subjected to the washing treatment is 287 on average.
It was 0 g, and the strength of the cloth treated with Comparative product 4 was remarkable.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Tamura 1334 Minato Minato, Wakayama, Wakayama Prefecture F-term in the research institute of Kao Corporation (reference) 4H003 AC08 AC09 AC23 BA13 DA01 EB14 EB32 EB37 ED02 FA03 FA15 FA21 FA30

Claims (1)

[Claims] 1. A nonionic surfactant (a) represented by the following general formula (I): 20 to 60% by weight, the following general formula (II):
A nonionic surfactant (b) of 10 to 40% by weight, a water-soluble silicone (c) and water (d), and the nonionic surfactant (a) or (b). A liquid detergent composition having an ionic surfactant content of 60% by weight or more and a pH at 20° C. of 6 to 8. _{^{R 1 -O- (EO) o -}} (PO) p - (EO) q -H (I) R 2 -O- (EO) m - (PO) n -H (II) wherein, R ¹ is an alkyl or alkenyl group having an average carbon number of 10 to 14, R ² represents an alkyl group having an average carbon number of 10 to 14, EO is an oxyethylene group, PO represents an oxypropylene group. o, p, q, m, and n are average addition mole numbers, and o>0, q>0, p=1 to 4.
5, m=4 to 8, n=5 to 12, and 1≦(n/m)≦2. ]