JP2000063883A - Detergent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detergent composed of a nonionic surface active agent having specific properties excellent in biodegradability and friendly to environment since polyoxy-alkylene alkylphenyl ethers which are poor in biodegradability adversely affect the pollution of rivers and ecosystems. SOLUTION: A detergent is composed of a nonionic surface active agent having a hydrophobic group and an oxyethylene group which meets the following formulae: [HLB]>20×[SP]-177 and [CP]>450×[SP]-4,220 (wherein [HLB], [SP] and [CP] are a hydrophilic-lipophilic balance of the nonionic surface active agent, a solubility parameter and a cloud point of the nonionic surface active agent, respectively).

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent comprising a nonionic surfactant having specific physical properties. 2. Description of the Related Art Nonionic detergents, particularly ether type nonionic detergents obtained by adding alkylene oxides such as ethylene oxide to alcohols and phenols, have a large detergency, especially at low concentrations. Large detergency,
It has many excellent features such as low bubbling, liquid form, no change in detergency due to water hardness, and good alkali resistance. Due to such characteristics, ether type nonionic detergents are used for washing and dishwashing household detergents,
It is a detergent widely used as cosmetics such as shampoos, industrial detergents such as metal washing, and the like. [0003] The ether type nonionic detergent is usually produced by adding an alkylene oxide such as ethylene oxide to alcohol or phenol. Here, the alcohol or phenol used as a raw material is appropriately selected depending on the use of the detergent. Widely used alcohols include naturally derived alcohols such as alcohol derived from coconut oil, alcohol derived from tallow, alcohol derived from soybean oil, alcohol derived from palm oil, and synthetic alcohols such as secondary alcohols called Ziegler alcohol, oxo alcohol, and sophthanol. Is used. However, what is said to have the best detergency is a polyoxyalkylene alkyl phenyl ether obtained by adding an alkylene oxide to an alkylphenol such as nonylphenol, octylphenol, and dodecylphenol obtained by the reaction of an olefin and phenol. [0004] However, polyoxyalkylene alkyl phenyl ethers have poor biodegradability, so that if they are contained in wastewater and released into the environment, they will adversely affect river pollution and ecosystems. There is a problem of giving. Therefore, the present inventors have studied diligently, and from a nonionic surfactant having almost the same detergency as polyoxyalkylene alkylphenyl ether, excellent in biodegradability, environmentally friendly, and having specific physical properties. Has developed a new cleaning agent. That is, the present invention relates to a nonionic surfactant having a hydrophobic group and an oxyethylene group, which is represented by the following formula (1): And equation (2): (Where [HLB] represents the HLB value of the nonionic surfactant, [SP] represents the solubility parameter of the nonionic surfactant determined by the method of Okitsu, and [CP] represents the nonionic surfactant. This is a detergent composed of a nonionic surfactant that satisfies the cloud point of the ionic surfactant. DETAILED DESCRIPTION OF THE INVENTION The detergent of the present invention comprises a nonionic surfactant having a hydrophobic group and an oxyethylene group.
In the formula (1), [HLB] represents the HLB value of the nonionic surfactant, that is, the value of the hydrophilic-hydrophobic balance.
[SP] is published in the Journal of the Adhesion Society of Japan, Vol. 29, No. 5, (199)
3) represents the solubility parameter of the nonionic surfactant obtained by the method of Okitsu described on page 204-.
In the formula (2), [CP] represents the cloud point of the nonionic surfactant. The cloud point may be a value determined by a usual experimental method. Such a detergent comprising a nonionic surfactant satisfying the conditions of the above formulas (1) and (2) is excellent in biodegradability and detergency as compared with conventional polyoxyethylene nonylphenyl ether and the like. . The detergent of the present invention can use other components together with the above-mentioned nonionic surfactant. Other components include, for example, nonionic surfactants such as alcohol ethoxylates, alkyl polyglycosides, and alkanolamides; alkyl benzene sulfonates, alkyl sulfates, alkyl ether sulfates, α-olefin sulfonates, acylated isethionates, and acylated amino acids Anionic surfactants such as acylated polypeptides, fatty acid soaps and alkyl ether carboxylates; cationic surfactants such as stearyltrimethylammonium, cetyltrimethylammonium and polydimethyldiallylammonium; alkylcarbobetaines, amidopropylcarbobetaines, Amphoteric surfactants such as imidazolinium betaine; semipolar surfactants such as alkylamine oxide; ethylene glycol, propylene Hydrotropes such as ethylene glycol, polyethylene glycol, polyalkylene glycol methyl ether, ethanol, paratoluenesulfonic acid; ethylenediaminetetraacetate (EDTA), hydroxyethylethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA), aminocarboxylic acids such as aspartic acid-N, N-diacetic acid, N-hydroxyethyliminodiacetic acid or salts thereof, and oxycarboxylic acids such as citric acid, gluconic acid, glycolic acid, tartaric acid or salts thereof. Sequestering agents such as magnesium sulfate, sodium sulfate (Glauber's salt), sodium carbonate, sodium bicarbonate, potassium carbonate, sodium silicate, potassium silicate, etc .; sodium hydroxide, water Alkalis such as potassium iodide; monoethanolamine, N-methylmonoethanolamine, N-ethylmonoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, 2-amino-2-methyl- Alkanolamines such as 1,3-propanediol and aminoethylethanolamine; dispersants such as sodium polyacrylate and sodium acrylate-olefin copolymer; preservatives, thickeners, enzymes, antibacterial agents, humectants,
Flavors, pigments and the like can be contained. [0013] The cleaning object of the cleaning agent of the present invention is not particularly limited. For example, a detergent for clothes for washing clothes and the like;
Hair or body cleaner for washing skin, nails, eyes, etc .; Kitchen cleaner for washing dishes, utensils, vegetables, etc .;
Residential cleaning agents for cleaning floors, tatami, furniture, ceilings, roofs, etc .;
Hard surface cleaners for cleaning toilets, bathtubs, bathrooms, ventilation fans, ranges around sinks, sinks, pipes, etc .; cleaners for automatic dishwashers, and industrial products for cleaning industrial products such as automobiles, aircraft, vehicles, and machine parts. It can be used as a cleaning agent and the like. The amount used is not particularly limited and may vary depending on the cleaning application, but is usually 0.0% relative to the total amount of the cleaning composition.
It is about 1 to 20% by weight. The present invention will be described more specifically with reference to the following examples. In the following examples, parts and percentages are by weight unless otherwise specified. In each of the following tests, the surfactants used in the cleaning agent of the present invention and the comparative product have the values of HLB, CP and SP shown in Table 1, respectively. [Table 1] The products 1 to 10 of the present invention are higher alcohol derivatives. Comparative product 1 is a 7.5 mol adduct of nonylphenol with ethylene oxide, comparative product 2 is a 9 mol adduct of nonylphenol with ethylene oxide, and comparative product 3 is a 10 mol adduct of nonylphenol with ethylene oxide. <Biodegradability test> The biodegradability was measured according to JI
The method of SK-0102 was followed. That is, BOD is the biochemical oxygen consumption, the amount of dissolved oxygen consumed by aerobic microorganisms in water. Here, the amount of dissolved oxygen consumed when the surfactant of the sample was diluted to a concentration of 1.0% with dilution water and left at 20 ° C. for 5 days.
TOD is a constant determined from the chemical structure of each sample. Table 2 shows the results. [Table 2] <Detergency test 1: Leaf nut test> A detergent composition having the following composition was prepared, and the detergency was evaluated by the lean nut test method. <Blending> Surfactant (for the product of the present invention or a comparative product) 8% Palm oil alcohol EO 3 mol adduct sulfate ester Na salt 18% Polyoxypropylene (25) methyl diethylammonium 3% Palm fatty acid diethanolamide 11% Palm alkyl Dimethylamine oxide 2% Others 17% (Na-p-toluenesulfonate, sodium hydroxide, ethanol, propylene glycol) Water Residue The test method was in accordance with JIS-K-3370, a method for testing the leachate detergency. That is, 10 g of tallow, 10 g of soybean oil, 60 mL of chloroform, and 0.1 g of oil red.
The slide glass was immersed in 1 g of the mixed solution, and each set of contaminated slide glass (= 6 sheets) was cleaned with a leanut detergency tester using the cleaning composition of the present invention and the comparative product. . The residual stain was extracted with 100 mL of chloroform from each set of washed slide glasses, the weight of the extracted components was measured, and the detergency was calculated by the following equation. Table 3 shows the results. [Equation 5] <Detergency test 2: Washing brush test> 3 g of a mixture of margarine (100 parts), flour (104 parts) and oleic acid (4 parts) was applied to a porcelain dish and allowed to stand overnight in a thermostat at a temperature of 22 ° C. and a humidity of 50%. The placed dish was used as a contaminated dish, and a detergency test was performed on the dish in the following manner. The water used in the test was artificial hard water having a calcium concentration of 50 ppm. 2
One liter of water at 5 ° C. was diluted at a ratio of 0.75 mL of the same detergent composition as in Example 1 to obtain a detergent solution. 1 liter of the above-mentioned detergent solution is placed in a plastic washing tub having a diameter of 30 cm.
500 mL of the above-described detergent solution placed in a 0-mL separatory funnel was dropped into the center of a plastic tub, and the detergent solution was foamed.
The contaminated dish was rubbed and washed 10 times with a 4.5 cm diameter cleaning brush, rinsed with running water for 10 seconds, and dried. For the dried dishes, the residual oil was evaluated visually and by the touch of fingers. The test results indicated the number of dishes that had no residual oil after drying. Table 3 shows the results. <Detergency Test 3: Cotton Cloth Detergency Test> An artificial sebum stain (myristic acid 8.4) was applied to a white cotton broad cloth.
%, Oleic acid 8.4%, tristearin 8.4%, triolein 8.4%, cholesterol 4.4%, cholesterol stearate 1.0%, paraffin 5.5%,
A mixture of 5.5% squalene, 49.5% cotton and 4% carbon black) with a sponge,
A cotton cloth contaminated with artificial sebum whose surface reflectance was adjusted to 25 ± 2% was prepared. The surfactant for the product of the present invention and the comparative product in Table 1 was used in tap water (hardness: 48 pp in terms of calcium carbonate).
m) to give a 0.05% aqueous solution to prepare a detergent aqueous solution. Using a Tergot meter, five cotton cloths contaminated with the artificial sebum cut into 5 cm squares were simultaneously washed with 800 mL of the above-mentioned aqueous detergent solution. Cleaning temperature is 2
5 ° C., washing time is 10 minutes, and then tap water 80
The rinse with 0 mL for 3 minutes was repeated twice. Thereafter, the cleaning rate was calculated by the following equation. [Equation 6] R ₀ : Reflectance (%) of the uncleaned cleaning cloth R _S : Reflectivity (%) of the contaminated cloth before cleaning R _w : Reflectivity (%) of the contaminated cloth after cleaning Was performed four times with the same detergent, and the average value was evaluated. Table 3 shows the results. <Detergency test 4: Metal cleaning test> Vertical 10c
100 mg of machine oil was adhered to a stainless steel test piece having a size of 10 m, a width of 10 cm and a thickness of 2 mm to obtain a contamination test piece. Then, a surfactant for the product of the present invention or the comparative product shown in Table 1 and sodium metasilicate were mixed at a weight ratio of 1: 9 to form a detergent solution, and 2% of a 0.2% aqueous solution of the detergent solution was added.
The test piece was immersed at 5 ° C. for 3 minutes, and then dried at 105 ° C. for 2 hours. The amount of machine oil deposited on the test piece after drying was measured, and the degreasing rate was determined by the following equation. Table 3 shows the results. [Mathematical formula-see original document] Table 3 shows the results of the above four types of detergency tests. [Table 3] These results show that the cleaning agent of the present invention has excellent detergency. The effect of the present invention is to provide an environmentally friendly detergent which has almost the same detergency as polyoxyalkylene alkyl phenyl ether, but also has excellent biodegradability. .

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Claims (1)

Claims: 1. A nonionic surfactant having a hydrophobic group and an oxyethylene group, which is represented by the following formula (1): And equation (2) [Wherein [HLB] represents the HLB value of the nonionic surfactant, [SP] represents the solubility parameter of the nonionic surfactant determined by the method of Okitsu, and [C
P] represents the cloud point of the nonionic surfactant. A cleaning agent comprising a nonionic surfactant satisfying the above condition.