JPH11323384A - High-concentration liquid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-concentration liquid detergent composition which is superb in low-temperature stability even at high concentrations and also excellent in dilution/dissolution in water. SOLUTION: The high-concentration liquid detergent composition comprises the following components (a) and (b), the weight ratio (a)/(b) of the components (a) and (b) being 1/20-1/3 or 3/2-20/1, the total content of the components (a)+(b) in the composition being 30-80 wt.%; (a) an alkylsulfuric acid ester salt whose basic component is an alkanolamine having one or two hydroxyl groups, and (b) an alkanolamide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-concentration liquid detergent composition, and more particularly to a detergent composition having good stability at low temperatures and excellent dilution and solubility in water during use. About.

[0002]

2. Description of the Related Art In recent years, for the purpose of resource saving, energy saving and space saving, high concentration and compactness of a cleaning agent have been attempted. In terms of shape, the amount of liquid detergent used has increased due to ease of use at the time of use, and the development of a high-concentration liquid detergent having good characteristics and performance is desired. Examples of surfactants used in detergents include anionic surfactants, nonionic surfactants, amphoteric surfactants, and cationic surfactants (detergent and washing encyclopedia: Asakura Shoten, 1990, pp. 103-142). ). In recent years,
There is an interest in highly biodegradable alkyl sulfates from the viewpoint of the environment. Regarding the use of alkanolamides and alkyl sulfates as detergent components, JP-A-8-60187 discloses a high-density granular detergent composition having a low effect on the environment in which an alkyl sulfate and an alkanolamide are combined. ing. JP-A-8-60187 discloses a high-concentration liquid neutral detergent composition containing sulfonic acid ethanolamine salt, polyoxyethylene alkyl ether and alkanolamide. JP-A-8-157871 discloses a liquid detergent composition containing a nonionic surfactant, an alkanolamine and an anionic surfactant alkanolamine salt.

[0003]

A problem in increasing the concentration of a surfactant solution used as a liquid detergent is to improve the properties of the solution, and in many cases, avoiding gelling or pasting. The purpose is. Means for solving this problem include mixing a large amount of an organic solvent soluble in water and an arbitrary ratio, but it is difficult to achieve both sufficient fluidity and good dilution solubility of the solution. In some cases, inconveniences such as a decrease in flash point, generation of an undesirable odor, and an increase in price have occurred. Japanese Patent Application Laid-Open No. 9-59672 and Japanese Patent Application Laid-Open No. 9-78 regarding improvement of properties of surfactant solution and dilution solubility in water
No. 087 discloses a combination of a 2-hydroxypolyoxyalkylene alkyl ether sulfate and another surfactant. Japanese Patent Publication No. 39-14979 discloses a detergent composition comprising an alkyl sulfate, an amine oxide and a dissolving agent composition. Problems such as turbidity and solidification occur, resulting in insufficient stability at low temperatures.
An object of the present invention is to solve the above-mentioned problems and to provide a high-concentration liquid detergent composition which has good low-temperature stability even at a high concentration and excellent diluting solubility in water.

[0004]

The present invention comprises the following component (a) and component (b), wherein component (a) and component (b)
And the weight ratio (a) / (b) is 1/20 to 1/3 or 3/2 to 20/1, and the total content of the components (a) and (b) in the composition ( A high-concentration liquid detergent composition characterized in that a) + (b) is 30 to 80% by weight. (A) Alkyl sulfates which are alkanolamines having one or two hydroxyl groups as basic components (b) Alkanolamide

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The alkyl sulfate of component (a) used in the present invention is a sulfate of an alcohol having 8 to 20 carbon atoms, and the alkyl group of the alcohol may be linear or branched. Well, specifically, octyl alcohol, nonyl alcohol decyl alcohol, undecyl alcohol, dodecyl alcohol, tridecyl alcohol, tetradecyl alcohol, heptadecyl alcohol, hexadecyl alcohol, octadecyl alcohol, octadecenyl alcohol, eicosyl alcohol And linear alcohols such as isodecanol, 2-butyloctanol, 2-pentylundecanol, isostearyl alcohol, 2-heptylundecanol, and branched alcohols such as 2-isooctyl isododecanol. Used as sulfate salts in combination with at least species or two or.

The basic component forming a sulfate ester salt used in the present invention is an alkanolamine having one or two hydroxyl groups, and specific examples thereof include monoethanolamine, diethanolamine, monoisopropanolamine and diisopropanolamine. Is mentioned. If an alkanolamine having three or more hydroxyl groups, for example, triethanolamine is used, good detergency cannot be obtained.

The alkanolamide of the component (b) used in the present invention is an amide compound formed from a fatty acid or its methyl ester and an alkanolamine. Fatty acids usable as raw materials include coconut oil, palm oil and palm kernel oil. , Soybean oil, rapeseed oil, sunflower oil, rice bran oil, corn oil, cottonseed oil, tall oil, castor oil, hydrogenated castor oil,
Mixed fatty acids produced by hydrolyzing and optionally hydrogenating naturally derived fats such as beef tallow, lard, and hardened fish oil, and simple fatty acids separated and purified from each mixed fatty acid, specifically, lauric acid , Myristic acid, palmitic acid, stearic acid, arachinic acid, behenic acid, myristoleic acid, palmitooleic acid, oleic acid, elaidic acid, erucic acid, linoleic acid, linolenic acid, ricinoleic acid, hydroxystearic acid, and natural sources Isostearic acid synthesized from the above fatty acid as a raw material. Further, the fatty acid used for the component (b) is not limited to a naturally-occurring fatty acid, and a synthetic fatty acid derived from petrochemicals can also be used. When a petrochemical-derived fatty acid is used, it preferably has 12 or more carbon atoms. The fatty acids of component (b) can be used alone or in combination of two or more.

The alkanolamine forming the alkanolamide of the present invention includes monoethanolamine, diethanolamine, monopropanolamine and the like. Further, it is possible to use polyoxyethylene alkanolamide obtained by adding an alkylene oxide to these alkanolamides. Among them, coconut oil fatty acid diethanolamide, palm kernel oil fatty acid diethanolamide and oleic acid diethanolamide are preferred.

The high-concentration liquid detergent composition of the present invention has a weight ratio (a) / (b) of component (a) to component (b) of 1/2.
0/1/3 or 3/2 to 20/1, preferably (a) / (b) is 1/10 to 1/3 or 3/2 to
10/1. (A) / (b) is greater than 1/3,
In a range smaller than 3/2, gelation occurs during storage at a low temperature. (A) / (b) is smaller than 1/20 and 20 /
In the range of more than 1, good detergency cannot be obtained.

The total content (a) + (b) of the component (a) and the component (b) in the high-concentration liquid detergent composition is 30 to 8
0% by weight. If the content is less than 30% by weight, the desired resource saving, energy saving and space saving cannot be achieved,
If it exceeds 0% by weight, it is difficult to secure good dilution solubility.

The high-concentration liquid detergent composition of the present invention preferably has a pH in the range of 7 to 11, more preferably 8 to 10 when prepared as a 0.07% by weight aqueous solution. . If the pH is less than 7, the cleaning power may not be sufficiently secured. If the pH is more than 11, irritation to the skin is feared, which is not preferable. The pH may be adjusted so that a 0.07% aqueous solution of an alkyl sulfate salt becomes 7 to 11 or may be adjusted using an acid or a base after preparing a high-concentration liquid detergent composition. As the acid, hydrochloric acid, sulfuric acid, nitric acid, citric acid, malic acid, lactic acid and the like are used, and as the base, potassium hydroxide, sodium hydroxide, monoethanolamine, diethanolamine, triethanolamine and the like are used.

The high-concentration liquid detergent composition of the present invention may contain other surfactants as long as the effects of the present invention are not impaired, and specific examples thereof include soap and olefin sulfonate. , Alkane sulfonate,
anionic surfactants such as α-sulfofatty acid ester salts, acylmethyltaurine salts, acylisethionate salts, N-acylamino acid salts, alkyl or alkenyl phosphate esters or salts thereof, alkylbetaines, alkylamidopropylbetaines, imidazoliniums Examples include betaine surfactants such as betaine, sulfobetaine, and phosphobetaine, and zwitterionic surfactants such as alkylamine oxide. In addition, builders generally added to detergent components, organic solvents such as alcohols and terpenes, optical brighteners, enzymes, anti-staining agents, chelating agents, bleaching agents, preservatives, dyes, fragrances, and extracts And the like.

[0013]

EXAMPLES The present invention will be specifically described with reference to examples. In addition,% shows weight%. EXAMPLES AND COMPARATIVE EXAMPLES The detergent compositions were prepared from the raw materials shown in Table 1 with the composition shown in Table 2 and subjected to a detergency test, low-temperature stability and dilution solubility evaluation. . The results are also shown in Table 2. The test methods and evaluation methods performed in the examples are shown below.

(1) Detergency test method The detergency test was carried out according to the following method. (A) Composition of wet-type artificially-stained cloth A wet-type artificially-stained cloth sold by the Laundry Chemistry Association was used. The wet artificial soil cloth has the following soil composition of 4
It was dispersed in 950 ml of tap water at 0 ° C. to contaminate a white cotton cloth. <Soil composition (%) of artificially contaminated cloth> Oleic acid 28.3 Triolein 15.6 Cholesterol oleate 10.0 Liquid paraffin 2.5 Cholesterol 1.6 Squalene 2.5 Gelatin 7.0 Mud (red yellow soil) 29.8 Carbon (Tamagawa Carbon) 0.5 Carbon (Tada Carbon) 0.3

(B) Washing test 5.0 mL of a 0.067% aqueous solution of the detergent composition was added to 1 liter.
5 x 5.0 cm contaminated cloths, Terg-o-to
Washing was performed at 100 rpm in a meter. The washing conditions are as follows. <Washing conditions> Washing time: 10 minutes Water temperature: 25 ° C Rinse: Rinse with running tap water for 5 minutes Dehydration: 3 minutes Drying: Natural drying (c) Detergency evaluation method (Manufactured by K.K.), the detergency was calculated from the following equation, and the average was evaluated in the following two steps.

[0016]

(Equation 1)

The detergency was evaluated according to the following criteria, and the results are shown in Table 2. ：: Good detergency (30% or more detergency) ×: Low detergency (less than 30% detergency)

(2) Evaluation of Low-Temperature Stability of Composition The detergent composition (80 ml) was placed in a 100 ml glass vial, stored at 0 ° C. for one week, and visually evaluated. When the composition was uniform and the fluidity was sufficiently observed, it was evaluated as ○, and when the fluidity decreased such as solidification or gelation, it was evaluated as ×.

(3) Diluting solubility of the composition 600 ml of water at 5 ° C. is placed in a 1-liter glass beaker, and stirred at 5 ° C. with a magnetic stirrer.
Was added, and it was visually determined whether or not the composition was rapidly and uniformly dissolved. When stirring was stopped 10 seconds after the addition, when the solution was homogeneously dissolved, ○ was given, and when turbidity occurred or a gel-like lump was present, × was given. The pH of the detergent composition was measured with a pH measuring device after adjusting each composition to a 0.07% aqueous solution with JIS pure water (Z8802-1964).

[0020]

[Table 1]

[0021]

[Table 2]

[0022]

The cleaning composition of the present invention, despite being a high-concentration liquid cleaning agent, has good low-temperature stability and sufficient dilution solubility in water. Also, a good cleaning effect can be exerted in various cleaning methods.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C11D 1:14 1:52)

Claims (1)

[Claims] 1. A composition comprising the following components (a) and (b), and the weight ratio (a) / (b) of the components (a) and (b):
Is 1/20 to 1/3 or 3/2 to 20/1,
A high-concentration liquid detergent composition characterized in that the total content (a) + (b) of the components (a) and (b) in the composition is 30 to 80% by weight. (A) Alkyl sulfates which are alkanolamines having one or two hydroxyl groups as basic components (b) Alkanolamide