JPH01289888A - Liquid abrasive composition - Google Patents

Abstract

PURPOSE:To obtain the title compsn. which is mild to the hand skin and free from changes in properties, such as color tone, odor or appearance, even when stored for a prolonged period of time, and has excellent stability, by incorporating a natural fruit juice, a humectant and a particular antibacterial agent in an abrasive. CONSTITUTION:0.01-0.1wt.% (hereinafter merely '%'), in terms of the amt. of undistilled or unconcentrated natural fruit juice, natural juice (e.g., lime juice), pref. 0.001-0.01% humectant (e.g., sodium pyrrolidonecarboxylate), pref. 0.005-0.05% antibacterial agent comprising 5-chloro-2-methyl-4-isothiazolin-3-one and/or 2-methyl-4-isothiazolin-3-one, pref. 7-70% water-insoluble abrasive (e.g., CaCO3) having pref. a Mohs' hardness of 3 or higher and an average particle size of 5-40mum, and the balance of water, optionally along with a surfactant, a hydrotrope, a perfume, etc., are mixed together, thereby preparing the title compsn.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a liquid polishing composition having excellent long-term storage stability. For more details, even if stored for a long time,
The present invention relates to a liquid cleanser composition that does not cause changes in properties such as color tone, fragrance, and appearance.

[Prior art and its problems]

Liquid cleanser compositions are made by dispersing water-insoluble abrasive substances in an aqueous surfactant solution and further adding dispersion stabilizers such as inorganic salts, hydrotropes, and organic polymers. known (for example, Japanese Patent Publication No. 59-48080, Japanese Unexamined Patent Publication No. 59-5'179)
Publication No. 6, Japanese Patent Publication No. 60-6998, Japanese Patent Publication No. 1988-62-
95400, JP-A-62-70497, etc.)
6. By the way, in such liquid cleanser compositions, bacteria are likely to enter through the additive water. Conventional liquid cleanser compositions provide growth conditions suitable for bacterial growth, so if they are stored for a long time, the color, scent, appearance, etc. of the composition will deteriorate due to bacterial growth, and the quality will deteriorate. becomes worse. Such quality deterioration is particularly noticeable when natural fruit juice and a moisturizing agent are added to impart mildness to hand skin.

(Objective) An object of the present invention is to solve the problem of quality deterioration due to bacterial growth, which is observed in liquid abrasive compositions containing natural fruit juices that are susceptible to bacterial contamination.

(Means for Solving the Problems) As a result of intensive research to achieve the above object, the present inventors discovered that the object could be achieved by blending a specific antibacterial agent, and the present invention I have reached the point where I have completed the .

That is, according to the present invention, natural fruit juice (A), a humectant (B), and 5-chloro-2-methyl-4-isothiazolin-3-one or 2-methyl-4-isothiazolin-3
- A liquid abrasive composition containing an antibacterial agent (C) consisting of one or a mixture thereof is provided.

The composition of the present invention contains natural fruit juice and a humectant to impart mildness to the skin of hands. As a natural fruit juice,
Natural fruit juices such as lime, lemon, orange, pineapple, etc. that meet the fruit juice drink standards specified in the Japanese Agricultural Standards are used, and diluted or concentrated products may be used. The amount added is 0.01 to 0.1% by weight2, preferably 0.03 to 0.06% by weight in terms of undiluted and undiluted natural fruit juice.

As the humectant, conventionally known ones can be used.

Examples of such substances include higher fatty acid alkyl esters such as isopropyl myristate and isopropyl palmitate, pyrrolidone carboxylic acid or its salts (such as sodium pyrrolidone carboxylate, potassium pyrrolidone carboxylate, and triethanolamide pyrrolidone carboxylate). salt). Moisturizer is 0.001
It is preferable to add it in a range of 0.01% by weight.

As the water-insoluble abrasive, conventionally known abrasives can be used. Examples of such substances include silicas such as silica sand and quartz sand, alumina silicates such as perlite, shirasu, white clay and feldspar, natural zeolite, calcium carbonate, crushed natural products such as sand or shellfish, calcium phosphate, and oxides. Powders of iron, alumina 11 oxide, titanium oxide, barium carbonate, etc. are used. In order for the composition to maintain sufficient polishing power, it must have a Mohs hardness of 3 or more and a semi-average particle size of 5.
It is preferable to use a powder of ˜40 −. If the average particle size is less than 5 μm, the polishing power is poor, and if it exceeds 4011R, the surface of the object to be washed is easily damaged. Incidentally, the average particle diameter as used herein means the median diameter obtained by measurement by a sedimentation method using Stokes' equation. The amount of the above abrasive added is 7
-70% by weight is good, and 40-55% by weight is more preferable. If it is less than 7% by weight, the polishing power will be poor and the storage stability will be poor, and if it exceeds 70% by weight, the viscosity will be high and it will be difficult to remove it from the bottle.

The composition of the present invention contains 5-chloro-2-
Add methyl-4-isothiazolin-3-one or 2-methyl-4-isothiazolin-3-one or a mixture thereof. The antibacterial agent is added in an effective amount, preferably in a proportion of o,oos to 0.05% by weight.

Although a surfactant is usually added to the composition of the present invention, its addition is not essential and can be omitted in some cases. Specific examples of surfactants include anion-active surfactants such as linear alkylbenzene sulfonates having alkyl groups having 8 to 18 carbon atoms, α-olefin sulfonates, alkyl sulfonates, and polyoxyethylene alkyl sulfates. Nonionic surfactants such as surfactants, fatty acid alkanolamides or derivatives thereof, polyoxyethylene alkylphenyl ethers, and polyoxyethylene-polyoxypropylene alkyl ethers are used.
From the viewpoint of cleaning power and foaming, it is preferable to use a linear alkylbenzene sulfonate together with an ethylene oxide adduct of a fatty acid alkanolamide or a fatty acid jetanolamide. The amount of surfactant added is usually selected in the range of 2 to 10% by weight, taking into account the viscosity of the final composition, but it is generally 5 to 8% by weight.
Weight percent is preferred.

In addition to one or more components, the composition of the present invention may also contain toluene sulfonic acid, benzoic acid, citric acid or a salt thereof, propylene glycol, ethylene Hydrotropes such as glycol and glycerin, fragrances, colorants, rust preventives, etc. can be added.

(Effects of the Invention) Even during long-term storage, the liquid polishing composition of the present invention does not allow bacterial growth and does not cause deterioration in properties such as color tone, fragrance, and appearance. Moreover, since it contains natural fruit juice and a moisturizer, it feels mild on the skin.

(Example) Next, the present invention will be explained in more detail with reference to Examples.

Example 1 A liquid polishing composition having the component composition shown in the following table was prepared.

Table 1 Next, the composition obtained above was subjected to a preservability acceleration test in the following manner to examine its long-term preservability.

Into the composition, 3 x 107 mixed bacteria of enterobacteria group/Pseudomonas aeruginosa/contaminated yeast group/mold bacteria = 1/1/1/1 were implanted,
After being left at 35°C, the number of bacteria (cells/g) was measured two weeks later, and the appearance and scent of the composition were also evaluated using the following criteria.

Outside lit! : 0...No abnormality △...Slightly blackish brown ×...Blackish brown scent Li: O...No abnormality Δ...Slightly putrid odor ×...Strong putrid odor or more The results are summarized in Table 2. From the results in Table 1, it can be seen that the composition of the present invention containing an effective amount (o, oos ~ 0.05 weight phantom) of an antibacterial agent does not cause bacterial growth and can be left for a long period of time. It can be seen that no deterioration of the properties occurs even when

Example 2 A composition was prepared in the same manner as in Example 1, except that the component compositions of natural fruit juice, humectant, and antibacterial agent were changed to those shown in Table 3. Furthermore, a preservability acceleration test was conducted on this composition in the same manner as in Example 1. The results are shown in Table-3.

From the results shown in Table 3, even if the same type of antibacterial agent
It can be seen that the object of the present invention cannot be achieved with antibacterial agents other than those specified in the present invention.

Example 3 A composition with the ingredient composition shown in Table 4 (containing a trace amount of fragrance,
The water balance was adjusted to 100 parts by weight in total).

Further, this composition was subjected to a preservability acceleration test in the same manner as in Example 1. The results are shown in Table 4.

Note that POE(9)POP(15) lauryl ether shown in Table 4 means a product obtained by addition-polymerizing lauryl alcohol with 9 moles of ethylene oxide and 15 moles of propylene oxide.

Claims (1)

[Claims] (1) Natural fruit juice (A), humectant (B), and 5-chloro-2-methyl-4-isothiazolin-3-one or 2-
A liquid abrasive composition containing an antibacterial agent (C) consisting of methyl-4-isothiazolin-3-one or a mixture thereof.