JPS5950278B2 - 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, this product has a low pH of around 1 to 2, so it has the disadvantage that it damages the joints of the tiles and is rough on the hands. To solve this problem, the pH of the cleaning agent should be adjusted to 4.5 to 7.
5 has been proposed (Special Publication No. 55-9
However, since this product uses ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, etc. as a solvent, it has a strong solvent odor that causes discomfort or choking when cleaning the bathroom. On the other hand, there are solvents that use mono- or dialkyl ethers of polypropylene glycol or mono- or dialkyl ethers of polyoxyethylene polyoxypropylene butyl copolymer, but these have poor solubility and detergency. The disadvantage is that it is inferior to conventional acidic detergents. The inventors of the present invention have conducted intensive studies to solve the above-mentioned drawbacks and develop a bathroom cleaning agent that causes less roughness on hands, has no solvent odor, and exhibits excellent cleaning power. The inventors have discovered that the desired objective can be achieved by using polypropylene glycol, and have completed the present invention.

That is, the present invention contains: 1 to 20% by weight of a nonionic surfactant53) 1 to 10% by weight of a hydroxy polycarboxylic acid or its salt 1 to 20% by weight of polypropylene glycol with an O average degree of polymerization of 5 to 25 This is a slightly acidic bathroom cleaning composition.

Nonionic surfactants as components include polyoxyethylene (6 to 30 mol), long chain alkyl (C8 to 0, primary or secondary) ether, polyoxyethylene (6 to 30 mol),
mole) alkyl (C8-18) phenyl ether and the like.

These nonionic surfactants can be used alone or in combination. The amount of nonionic surfactant is from 1 to 20% by weight, preferably from 3 to 15% by weight in the cleaning composition. 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 of cleaning is not improved, and the foaming becomes worse, reducing cleaning efficiency. Note that anionic surfactants such as alkylbenzene sulfonates and α-olefin sulfonates, amphoteric surfactants, and the like can be optionally used as long as they do not impede the effects of the present invention. Examples of the hydroxy polycarboxylic acid of component (b) include compounds represented by the following formula.

(In the formula, X is H, CH3, CH2OH, CH2COOH
or HOCHCOOH, and Y is H or OH.

) Among these, malic acid and citric acid are preferred. As component 8, a salt of hydroxy polyhydric carboxylic acid can also be used,
Preferred are Na salt, K salt, monoethanolamine salt, diethanolamine salt, and triethanolamine salt. Ingredient 8
The blending amount is 1 to 10% by weight, and the preferable range is 3 to 10% by weight.
It is 8% by weight. The greater the amount of component 8 blended, the greater the detergency, but even if it is blended in an amount of 10% by weight or more, the dirt removal power is not improved, and if it is less than 1% by weight, the effect is insufficient. Ingredients (6
) is required to be polypropylene glycol having an average degree of polymerization of 5 to 25. Here, polypropylene glycol includes, in addition to propylene oxide polymers, glycerin or trimethylolpropane polymerized with propylene oxide. The average degree of polymerization of polypropylene glycol is required to be 5 to 25. If a polymer having an average degree of polymerization of less than 5 is used, excellent detergency will not be obtained, and if the average degree of polymerization exceeds 25, solubility will deteriorate. The content of polypropylene glycol is 1 to 20% by weight. If the content is less than 1% by weight, the effect of wetting and dissolving dirt as a solvent will not be sufficiently exhibited, and if the content exceeds 20% by weight, the effect will not be improved. The preferred average degree of polymerization of polypropylene glycol is 8 to 20, and the preferred content in the cleaning agent is 3 to 20.
It is 15% by weight. In addition to the above essential ingredients, water is required to make it liquid.

The bathroom cleaning composition of the present invention needs to contain components (4), (6), and (C) in the above amounts and be weakly acidic.

In other words, by setting the pH to 3 to 6, which is weakly acidic, it is possible to prevent rough hands and damage to the tile joints, and the component concentration is 8 (
The synergistic effect of 6) makes it possible to obtain a bathroom cleaning composition that has a high ability to remove solvent stains and has no solvent odor. Note that when a hydroxy polycarboxylic acid is used as component 8, it is necessary to adjust the pH to 3 to 6 with an alkaline agent such as NaOH. The bathroom cleaning composition of the present invention may further contain hydrodrobes such as ethanol and ethylene glycol, disinfectants, perfumes, pigments, and the like.

The content of the present invention will be specifically explained below by giving Examples.

Example 1 The cleaning power, solvent odor, and roughness of hands of various cleaning agents were evaluated and Table 1
It was shown to.

The cleaning power, solvent odor, and roughness of hands 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 the surface of the wash basin was rubbed 10 times with a sponge loaded with a load of 500 f1, and the state of dirt removal was visually judged.

○ Removes dirt well. △ Dirt removal is uneven.

× Almost no dirt is removed.

Solvent odor The odor of the blended cleaning agent was sensory evaluated.

○ Almost no solvent odor.

△ There is a slight smell of solvent.

× There is a very strong solvent odor.

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

One day later, the condition of the hands was visually evaluated according to the following criteria. ○
Rough hands are not allowed. △ Some roughness is observed.

Example 2 The performance of bathroom cleaning compositions with varying blending amounts was evaluated and shown in Table 2.

Example 3 Polyoxyethylene (P=14) alkyl (C,2) ether 10% by weight, citric acid 5% by weight, average degree of polymerization (P
), 5% by weight of polypropylene glycol, 3% by weight of ethanol, 77% by weight of water, and the pH was adjusted to 4 with NaOH.
．． The detergency of the composition adjusted to 0 is shown in Table 3.

Claims (1)

[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 to 1 with an average degree of polymerization of 5 to 25
A weakly acidic bathroom cleaning composition containing 20% by weight.