JPH10204483A - Liquid cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid cleanser composition capable of manifesting excellent cleansing properties without reducing the low stimulation to the skin, and useful for cleansing of a bath, a bathtub, etc. by formulating an aminocarboxylic acid (salt) and a specific organic acid (salt) with 2-ethylhexylglycoside. SOLUTION: This liquid cleansing composition comprises (A) 2- ethylhexylglycoside, (B) an aminocarboxylic acid (salt) such as alkali metal salt of ethylenediaminetetraacetic acid, and (C) a 2-6C polybasic carboxylic acid-type organic acid (salt), [e.g. a dibasic or tribasic carboxylic acid-type organic acid (salt), concretely citric acid (salt)] and preferably includes components B and C of 1 to 1/5 pt.wt. and 1/5 to 1/10 pt.wt. respectively based on 1 pt.wt. of the component A. The pH of the composition is preferably regulated so as to be 7-8.

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, and more particularly to a liquid detergent composition suitable for washing a bathroom or a bathtub, and more particularly to a liquid detergent composition having a pH in a neutral range. The present invention relates to a liquid detergent composition having excellent detergency.

[0002]

2. Description of the Related Art In recent years, the living environment has been changing due to the spread of system baths, the enlargement of bathtubs, and the spread of artificial marble bathtubs, and there has been an increasing demand for keeping bathrooms beautiful. Housewives have a high level of awareness of cleanliness and hygiene, and bathrooms are frequently maintained. The objects to be cleaned in the bathroom are bathtubs, floors, walls, ceilings, bath lids, mushrooms and mats, wash tubs, mirrors, faucets, showers, drains, soap boxes, etc. ing.

[0003] The stains adhering to these objects are mainly soap scum and proteins, free fatty acids, lipids and the like from the human body. Fatty acid calcium or fatty acid magnesium in the soil is considered to be insoluble in water and form a strong film using proteins, free fatty acids, lipids and the like as binders over time.

Conventional bathtub / bathroom cleaners are mainly composed of a weakly alkaline type utilizing the action of an alkali such as an alkanolamine on the surfactants AES and LAS, and a polycarboxylic acid such as citric acid or malic acid as a main component. And LAS, a weak acid type containing a glycol-based solvent, a cleanser type containing an abrasive, etc., all of which have a considerable effect on the bathtub, bathroom tools and the human body, and The neutral type considered had insufficient cleaning power.

The same applies to the combination of a cationic surfactant and a nonionic surfactant reported in Japanese Patent Application Laid-Open No. 61-283696, and there is a problem particularly in the solubility of metal soap scum of long-chain fatty acids. was there.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a bathroom / tub cleaning composition which has sufficient detergency and is less irritating to the skin, such as being less irritating to the skin.

[0007]

The present invention provides (a) 2-ethylhexyl glucoside (EHG), (b) an aminocarboxylic acid or a salt thereof, and (c) a polycarboxylic acid type organic acid having 2 to 6 carbon atoms. Provided is a liquid detergent composition containing a salt thereof (for example, citric acid), particularly a liquid detergent composition having a pH of 7 to 8.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The aminocarboxylic acid or its salt of the component (b) is, for example, ethylenediaminetetraacetic acid (EDT).
A), hydroxyethylethylenediaminetriacetic acid (HE
DTA), nitrilotriacetic acid (NTA), hydroxyethyliminodiacetic acid (HIMDA) and the like. As the component (b), one that is water-soluble and acts as a chelating agent can be used.

The polycarboxylic acid type organic acid having 2 to 5 carbon atoms of component (c) or a salt thereof includes, for example, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid,
Examples thereof include fumaric acid, malic acid, tartaric acid, citric acid and the like and sodium salts and potassium salts thereof. Preferably, divalent to trivalent carboxylic acid type organic acids or salts thereof, particularly preferably citric acid or salts thereof use.

[0010] Component (a) of the liquid detergent composition of the present invention,
Component (b) is added in an amount of 2 to 1/20 parts by weight, preferably 1 to 1/5 parts by weight, based on 1 part by weight of component (a). Component (c) is 1/2 to 2
1/50 parts by weight, preferably 1/5 to 1/10 parts by weight. If the contents of the component (b) and the component (c) are large, the effect on the skin is observed. If the content is too small, a synergistic effect of detergency by mixing two types cannot be expected.

The liquid detergent composition of the present invention is an aqueous solution containing the components (a), (b) and (c) as essential components, and its pH can be adjusted with a suitable alkali or acid. , Preferably adjusted to 7-8. For example, sodium hydroxide, potassium hydroxide, ammonia and the like can be used as the alkali; hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid and the like can be used as the acid.

The liquid detergent composition of the present invention may contain an anionic surfactant within a range that does not affect the detergency and skin irritation for the purpose of improving foaming properties. Such anionic surfactants include alpha olefin sulfonates, alkyl sulfates, alkyl ether sulfates, alkyl ether sulfonates, and the like. However, the concentration is preferably 1% by weight or less from the viewpoint of skin irritation.

The liquid detergent composition of the present invention is used as it is or in a diluted form.
It is appropriately selected according to the state of dirt. However, when the total content of the composition is 0.5% by weight or less, the detergency is not sufficient.

The method of using the liquid detergent composition of the present invention is as follows.
It is performed by spraying and spraying the undiluted solution or aqueous solution on a bathtub or the like, rubbing with a sponge or the like, and then rinsing with water. For small objects to be used in the bathroom, it is recommended that the objects be pickled and then rinsed with water.

[0015]

EFFECTS A liquid detergent composition containing EHG has the advantage of being less irritating to the skin, although the detergency is not necessarily sufficient depending on the application. According to the invention, E
Liquid cleaning compositions containing HG are themselves EH
By combining aminocarboxylic acid or a salt thereof and a specific organic acid, which are less cleansable than G and have strong skin irritation, the skin irritation remains low, especially in cleaning of bathtubs and bathroom stains. , A liquid detergent composition exhibiting good detergency can be provided.

[0016]

Next, the present invention will be described in more detail with reference to examples. The present invention is not limited by these.

[0017] The compositions of Examples 1-5 and Comparative Examples 1-9 are shown in Examples 1-5 and Comparative Examples 1-9 Table 1 were prepared and subjected to detergency test and skin irritation test described below,
evaluated. Each composition was made into an aqueous solution of a balanced amount of water, and adjusted to pH 7.5 with an aqueous sodium hydroxide solution. Table 2 shows the results.

(1) Detergency test method (JIS-K-33)
Improved synthetic detergent evaluation method for 62 synthetic kitchen detergents) Stainless steel plate (JIS G-4305: SUS-30)
4, 0.8 × 25 × 50 mm) surface was degreased and cleaned with xylene and acetone, and a model stain 10 having the following composition was obtained.
g was dissolved in 60 ml of chloroform, adhered to about 80% of the surface of the stainless steel plate, suspended for about 1 hour and allowed to evaporate chloroform to obtain a test piece.

Model soil composition Calcium stearate 47.5 wt. % Bovine serum albumin 2.5 wt. % Oleic acid 25.0 wt. % Triolein 25.0 wt. %

Leanut type detergency tester containing 6 test pieces (6 pieces as a set and measuring the weight before and after applying the contaminated oil) and 500 ml of a 5% by weight aqueous solution of the composition And stir at 50 rpm for 30 seconds. Then replace with a wash beaker containing tap water,
Rinse at 50 rpm for 60 seconds. Next, the test piece is taken out, hung and dried. Again, weigh 6 pieces as a set. The cleaning removal rate is calculated by the following equation.

Washing removal rate = (Amount of stain before washing−Amount of stain after washing) / (Amount of stain before washing) × 100

(2) Influence test on skin A patch test of a 5% aqueous solution of each cleaning solution was performed, and the results of the investigation were determined as follows. Anything with something uncomfortable on the skin was considered problematic.

Judgment 90% or more no problem: ◎ 70% to 90% No problem: ○ 50% to 70% No problem: △ 50% or more problem: ×

[0024]

Table 1 Surfactant chelating agent citric acid Example 1 EHG (5) EDTA4Na (2) (0.5) Example 2 EHG (5) HEDTA3Na (2) (0.5) Example 3 EHG (5) NTA3Na (2) (0.5) Example 4 EHG (5) HIMDA2Na (2) (0.5) Example 5 EHG (2) HIMDA2Na (2) (0.5) Comparative Example 1 EHG (10) − − Comparative Example 2-EDTA4Na (2)-Comparative Example 3-EDTA4Na (2) (0.5) Comparative Example 4 OG (10) EDTA4Na (2) (0.5) Comparative Example 5 LAG (10) EDTA4Na (2) ( 0.5) Comparative Example 6 HAG (10) EDTA4Na (2) (0.5) Comparative Example 7 LAS (10) EDTA4Na (2) (0.5) Comparative Example 8 AES (10) EDTA Na (2) (0.5) Comparative Example 9 OEA (10) EDTA4Na (2 ) (0.5)

Note: In Table 1, OG is n-octyl glucoside, LAG is C ₈ -C ₁₆ polyalkyl glucoside, HA
G is C ₁₂ -C ₁₆ polyalkyl glucoside, LAS is sodium linear alkyl benzene sulfonate, AES is sodium alkyl ether sulfonate, OEL is polyoxyethylene (9) lauryl ether; EDTA4
Na is EDTA4 sodium salt, HEDTA3Na is H
EDTA3 sodium salt, NTA3Na indicates NTA3 sodium salt, HIMDA2Na indicates HIMDA2 sodium salt; numerical values are% by weight.

[0026]

[Table 2] Formulation Examples Detergency (cleaning removal rate) Influence on skin Example 1 95% or more ◎ Example 2 95% or more ◎ Example 3 95% or more ◎ Example 4 95% or more ◎ Example 5 90 ９５95% 比較 Comparative Example 1 80 to 85% Comparative Example 2 25 to 30% 比較 Comparative Example 3 30 to 35% 比較 Comparative Example 4 70 to 75% Comparative Example 5 55 to 60% Comparative Example 6 70 to 75 % ○ Comparative Example 7 70 to 75% × Comparative Example 8 60 to 65% △ Comparative Example 9 20 to 25% ○

[0027]

The present invention is effective for cleaning dirt in bathtubs and bathrooms, and has little irritation to the skin and little effect on the human body.

Claims (3)

[Claims] (A) 2-ethylhexyl glucoside,
(B) aminocarboxylic acid or a salt thereof and (c) carbon number 2
A liquid detergent composition comprising the polycarboxylic acid organic acid or a salt thereof according to any one of (1) to (6). 2. The liquid detergent composition according to claim 1, which comprises (c) citric acid as a polycarboxylic acid type organic acid having 2 to 6 carbon atoms. 3. The liquid detergent composition according to claim 1, which has a pH of 7 to 8.