JPS597760B2 - Bathroom cleaning composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weakly acidic bathroom cleaning composition.

Dirt in the bathroom consists of organic and inorganic substances such as fatty acid metal salts (mainly polyvalent metal salts such as calcium salts), free fatty acids, glycerade, and nitrogen-containing compounds, so acidic substances and surfactants are required to remove these stains. , acidic cleaning agents containing solvents are effective.

However, conventional products have a low pH of around 1 to 2, so there is a problem with damaging the joints of the tiles and not being rough with your hands.
Furthermore, since ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, etc. are used as a solvent, there is a problem in that the solvent odor is strong and a large amount of perfume must be added. In order to solve all of these problems, the present inventors developed a weakly acidic bathroom cleaning agent containing a nonionic surfactant, hydroxy polycarboxylic acid or its salt, and polypropylene glycol having a specific degree of polymerization. It has been developed and a patent application has already been filed. See Japanese Unexamined Patent Publication No. 57-198. This product is an excellent bathroom cleaner that does not cause rough hands, has no solvent odor, and has great cleaning power, but it has the disadvantage of lacking freeze-recovery properties. In other words, even if left for a long time at room temperature, no precipitation will occur and the liquid will remain in good condition, but the temperature will change between freezing at a low temperature of -10°C or lower and the temperature range of 5 to 100°C. If this is done, a precipitate will be formed, and the precipitate will remain undissolved even after the temperature is returned to room temperature, resulting in an unfavorable appearance and deterioration in performance. The inventors of the present invention have conducted intensive studies to solve the above-mentioned drawbacks and develop a bathroom detergent composition that is less rough on hands, has no solvent odor, and has excellent detergency and freeze recovery properties. The inventors have discovered that the desired objective can be achieved by blending ethylene glycol or polyethylene glycol having a specific degree of polymerization into the weakly acidic bathroom cleaner used, and have accomplished the present invention.

That is, the present invention provides (2) nonionic surfactants 1 to 2
0% by weight of former hydroxy polycarphonic acid or its salt 1~
10% by weight (C) 1 to 20% by weight of polybutylene glycol with an average degree of polymerization of 5 to 25 (loethylene glycol or 0.1% of polyethylene glycol with an average degree of polymerization of 2 to 10)
~10 weight? A weakly acidic bathroom cleaning composition comprising:

As the nonionic surfactant of component (4), polyoxyethylene (6 to 30 mol) long chain alkyl (C8, to 22 primary or secondary) ether, polyoxyethylene (6 to 30 mol),
~30 mol) alkyl (C8,18) phenyl ether is exemplified as a preferred example.

These nonionic surfactants can be used alone or in combination. The amount of nonionic surfactant in the cleaning composition is 1 to 20% by weight? and preferably 3 to 15% by weight. If the content of the nonionic surfactant is less than 1% by weight, the effect of moistening dirt components and promoting the reaction between water-soluble organic acids and fatty acid metal salts is poor, while if the content is more than 20% by weight, these The effectiveness is not improved and the foaming becomes worse, reducing cleaning efficiency. Anionic surfactants such as alkylbenzene sulfonates and a-olefin sulfonates, amphoteric surfactants, and the like can be optionally used as long as they do not impede the effects of the present invention. Component (8) is a hydroxy polycarboxylic acid or a salt thereof having 4 to 4 carbon atoms.
6 is preferred, and examples thereof include those represented by the following general formula (1) and salts thereof.

(In the formula, X is HlCH3, CH2OH.CH2COOH
or HOCHCOOH, and Y is H or OH. ) Among these, malic acid and citric acid are particularly preferred. The salt of hydroxy polycarboxylic acid of component (8) is N
Preferred are a salt, K salt, monoethanolamine salt, diethanolamine salt, and triethanolamine salt. Ingredients (B
) is 1 to 10 weight? and the preferred range is 3
~8% by weight. The greater the amount of component (B) blended, the greater the cleaning power, but even if it was blended at 10% by weight or more, the dirt removal power did not improve, and 1% by weight or more? The effect is insufficient below. Component (O is polypropylene glycol with an average degree of polymerization of 5 to 25.

Here, the polypropylene glycol used in the present invention includes:
The propylene oxide polymer is naturally glycerin or trimethyl (the same applies to the following examples)
. Note that the detergency, solvent odor, roughness on hands, and freeze-restorability were evaluated according to the following criteria.

Detergent was sprinkled on a polyethylene wash basin with scale that could not be removed by scrubbing, and then the surface of the wash basin was rubbed 10 times with a sponge with a load of 5009, and the state of dirt removal was visually judged.

The odor of the cleaning agent containing solvent odor was sensory evaluated.

Prepare a 5% solution of a cleaning agent that roughens your hands, keep the temperature of the solution at 30°C, soak your hands in it for 20 minutes, and then wash your hands thoroughly with water.

The condition of the hands one day later was visually judged according to the following criteria. Freeze-restoring detergent was kept at -20°C for 3 days (frozen) and then heated to 10°C.
The operation of leaving the solution for one day was defined as one cycle, and the state of the solution at 10° C. after repeating this five times was evaluated based on the following criteria.

From Table 1, it can be seen that the products of the present invention have excellent performance in terms of detergency, solvent odor, roughness on hands, and freeze-restoration properties.

Example 2 The performance of bathroom cleaning compositions with varying blending amounts was evaluated and shown in Table 2. It can be seen that the product of the present invention has excellent performance in both detergency and freeze-restoring properties.

The product of the present invention has little solvent odor and has good resistance to rough hands. Example 3 Polyoxyethylene (p=14) lauryl ether 10
5% by weight of citric acid, 5% by weight of polypropylene glycol with varying average degree of polymerization (P), 3% by weight of ethylene glycol, 2% by weight of ethanol, 75% by weight of water,
Table 3 shows the detergency and freeze recovery properties of the composition whose pH was adjusted to 4.0 with NaOH.

This result shows that the degree of polymerization of polypropylene glycol has an important meaning in achieving the object of the present invention.

In addition to the performance shown in Table 3, the product of the present invention has less solvent odor and less roughness on hands. Example 4 Polyoxyethylene (P=10) lauryl ether 1
0% by weight, (B) malic acid 5% by weight? , (O polypropylene glycol (P=10) 5% by weight, (D) solubilizer (
Table 4 shows the blending amounts.

), 3% by weight of ethanol, the balance being water, NaOH
Table 4 shows the detergency and freeze recovery properties of the composition whose pH was adjusted to 4.0. This result shows that the average degree of polymerization of polyethylene glycol is important, and that the weight ratio of (D)/(C) is preferably within the range of 1/20 to 1/1.

Claims (1)

[Scope of Claims] 1 (A) 1 to 20% by weight of nonionic surfactant (B) 1 to 10% by weight of hydroxy polycarboxylic acid or its salt (
C) Polypropylene glycol 1 with an average degree of polymerization of 5 to 25
~20% by weight (D) A weakly acidic bathroom cleaning composition comprising 0.1 to 10% by weight of ethylene glycol or polyethylene glycol having an average degree of polymerization of 2 to 10. 2. The bathroom cleaning composition according to claim 1, wherein component (B) is a hydroxy polycarboxylic acid having 4 to 6 carbon atoms or a salt thereof. 3. The bathroom cleaner according to claim 1, wherein the ratio (D)/(C) of component (C) and component (D) is within the range of 1/(20) to 1/1 by weight. Composition.