JP2663180B2 - Viscosity lowering inhibitor and liquid bleach composition containing said inhibitor - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a viscosity-lowering inhibitor useful for preventing the viscosity of a thickened liquid composition from decreasing over time and an aqueous liquid composition containing the same. Articles, such as liquid bleach compositions, liquid detergent compositions and the like.

[Conventional technology]

In order to enhance the usability, the viscosity of an aqueous composition has been increased. For example, US Pat. No. 3,684,722 discloses that a liquid bleach composition containing an alkali metal hypochlorite is thickened by using amine oxide and / or betaine in combination with a saturated fatty acid salt having 8 to 18 carbon atoms. Although there is disclosed a method of causing the viscosity to increase, there is a problem that the viscosity decreases with time if the thickening composition is left as it is. In order to solve this problem, it has been proposed to use a synthetic anionic surfactant in combination (Japanese Patent Laid-Open No. 60-92398). However, synthetic anionic surfactants have the drawback that the viscosity of the system decreases upon addition and the effect of preventing the viscosity from decreasing with time is not sufficient.

On the other hand, JP-A-60-173098 discloses amine oxide,
A method of thickening a liquid bleach by using salicylic acid and an electrolyte in combination has been disclosed, but the action of salicylic acid promotes the decomposition of the bleaching component hypochlorite, and the viscosity increases with time. There is a problem of lowering.

[Problems to be solved by the invention]

Accordingly, an object of the present invention is to provide a viscosity reduction inhibitor capable of effectively preventing the viscosity of the thickened aqueous composition from decreasing with time. Another object of the present invention is to provide a thickened aqueous liquid composition containing the viscosity reducing agent.

[Means for solving the problem]

The above object has been achieved based on the finding that a compound obtained by adding an alkylene oxide in a specific molar range to phenol has an excellent viscosity lowering effect.

That is, the present invention provides a compound represented by the general formula (I): (Wherein R ¹ and R ² are hydrogen or a methyl group, and n and m are each an integer of 0 to 10;
Never be. ) The present invention provides a viscosity lowering inhibitor characterized by containing a phenoxy alcohol represented by the following formula:

In the present invention, the compound of the general formula (I) includes
(I) a compound wherein R ¹ is hydrogen and n is 0 and m is 1 or more; (ii)
A compound wherein R ¹ is methyl and n is 0 and m is 1 or more; (iii) R ¹
Is hydrogen, R ² is methyl and m and n are each 1 or more, and (iv) R ¹ is methyl, R ² is hydrogen and m and n are each 1
These compounds are mentioned. Of these, particularly high water solubility The total of n + m is preferably 1 to 5, more preferably 1 to 2. Specific examples of the phenoxy alcohol represented by the general formula (I) include phenoxyethanol, phenoxypropanol, diethylene glycol phenyl ether, triethylene glycol phenyl ether, dipropylene glycol phenyl ether, Ph
(EO) (PO) H (where Ph is phenoxy, EO is CH ₂ CH
₂ O and PO represent C ₃ H ₆ O. The same shall apply hereinafter), Ph (EO) ₄ (PO)
H, Ph (PO) (EO) ₂ H, Ph (PO) ₂ (EO) ₃ H and the like.

The phenoxy alcohol represented by the above general formula (I) can prevent a decrease in viscosity over time in addition to any thickened liquid composition. As such a liquid composition, about 10 cp or more (25 ° C.), preferably 25 to 1,000 cp,
Particularly preferably, a liquid bleach composition or a liquid detergent composition having a viscosity of 20 to 500 cp is exemplified. Such liquid compositions include, for example, surfactants, electrolyte components, thickeners, bleaching components, hydrotropes, coloring agents, perfumes, and other components added to bleaching agents and cleaning agents.

Specific examples of the surfactant include α-olefin sulfonate, alkylbenzene sulfonate, alkane sulfonate, alkyl diphenyl ether disulfonate, polyoxyethylene alkyl phenyl ether sulfate, polyoxyethylene alkyl phenyl ether sulfate sulfonate (NES-D), and alkyl ether Anionic surfactants such as sulfates, polyoxyethylene alkyl ether sulfates, fatty acids or their alkali metal salts, ammonium salts, alkanolamine salts; polyoxyalkylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, sorbitan alkyl esters, polyoxyalkylenes Nonionic surfactants such as sorbitan alkyl esters; aliphatic amine salts, alkyl esters Ammonium chloride, dialkyl dimethyl ammonium chloride, cationic surfactants such as benzalkonium chloride; carboxylic acid type, sulfuric ester type, sulfonic acid type amphoteric surfactants such as phosphoric acid ester type; and And zwitterionic surfactants which are amine oxides. These surfactants can be contained in an amount of 0.1 to 7% by weight (hereinafter abbreviated as%), preferably 0.1 to 3%.

Specifically, as an electrolyte component, an alkali metal hydroxide, an alkali metal carbonate, an alkali metal hydrochloride, an inorganic compound such as an alkali metal sulfate, or monoethanol, diethanol, an organic alkali such as triethanol or ethylenediaminetetraacetic acid, Chelating agents such as polycarboxylic acids are exemplified. 0.1 to 10% of these electrolytes, preferably
0.1-5% can be contained.

Specific examples of the thickener may be used in combination with the above surfactants, but natural polymer compounds such as carrageenan, guar gum, xanthan gum, alginic acid, CMC, cross-linked polyacrylic acid, and synthetic polymer compounds such as PVA And hydratable viscosity minerals such as montmorillonite.
These thickeners are added in an amount sufficient to keep the viscosity of the aqueous composition within the above range. Specifically, the content is 0.01 to 5%, preferably 0.1 to 2%.

Examples of the bleaching component include hypochlorite, hydrogen peroxide, and hydrogen peroxide adduct. When a liquid bleach composition is prepared, it is contained in an amount of 0.5 to 10%, preferably 1 to 6%.

Examples of the hydrotrope include alcohols such as ethanol, propanol, isopropanol, glycerin, and diethylene glycol, and lower alkylbenzene sulfonic acids, lower alkylbenzene carboxylic acids, and salts thereof. These can be contained, if desired, in an amount of 0.1 to 10%.

Examples of the coloring agent include, for example, copper phthalocyanine pigments described in JP-B-55-20519.
Pigments and dyes used in detergents and bleaching agents may be used, and fragrances and the like stable in bleaching agent components may be used.

Although the components constituting the thickening liquid composition have been described above, the thickening composition may be prepared by using a material other than those exemplified here.

The thickening liquid composition may contain the phenoxy alcohol of the general formula (I) in an optional amount.
-5%, preferably 0.02-0.5%.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, in the thickened composition, it becomes possible to remarkably suppress the decrease in viscosity during long-term storage or storage at high temperature, and washing or bleaching is an advantage of the thickened composition. The ability to adhere to the surface can be maintained for a long time.

When a phenoxy alcohol of the general formula (I) is blended with a thickened liquid bleach containing hypochlorite,
This has the advantage that the decomposition of hypochlorite can be kept low.

 Next, the present invention will be described with reference to examples.

The measurement of viscosity and the decomposition rate of available chlorine (or available oxygen) in Examples were determined by the following methods.

〔Example〕

Viscosity measurement Rotor speed 60 with BL type viscometer manufactured by Tokyo Keiki Co., Ltd.
Was measured. Before and after storage, the sample is 25 ℃
Was measured.

Decomposition rate of available chlorine (available oxygen) Calculated from the following equation.

Example 1 Sodium hypochlorite (available chlorine) 2% NaOH 2% Palm alkyl dimethylamine oxide 0.7% Sodium coconut fatty acid 0.4% Viscosity reducing agent Table 1 Pigment 0.01% Perfume 0.1% Pure bleach composition liquid bleach composition Were prepared and the stability of the viscosity was investigated. The results and composition are summarized in Table 1. The palm alkyl dimethylamine oxide is Lion Okuzo Co., Ltd., trade name Aromox DMC-W, the pigment is a copper phthalocyanine pigment, and the sodium polyoxyethylene nonyl phenyl ether sulfate in Table 1 is Sanyo Chemical Industries, Ltd. ), Trade name Nonipol S-40, NES-D
Is a polyoxyethylene nonyl phenyl ether sulfate / sulfonate Na salt, and phenoxyethanol is Sanyo Chemical Industries, Ltd., trade name Newpole EPP.

Example 2 Hydrogen peroxide (active oxygen) 3% 1-hydroxyethane-1,1 diphosphonic acid 0.1% Tartaric acid 2.5% Surfactant Table-2 Viscosity reducing agent 剤 Pure Balance (pH adjusted to 4 with sodium hydroxide) The viscosity of the liquid bleach composition having the above composition was adjusted and the stability of the viscosity was examined. Table 2 shows the results.

The following surfactants were used in the table.

Alkylphenol polyoxyethylene ether sulfate: Sanyo Chemical Industries, Ltd., trade name Nonipol S-40 Alkanesulfonate: Alkanesulfonate Na salt having 12 to 18 carbon atoms (average MW328) B3267J

Claims (2)

(57) [Claims] 1. A compound of the general formula (I): (Wherein R ¹ and R ² are hydrogen or a methyl group, and n and m are each an integer of 0 to 10;
Never be. A viscosity lowering inhibitor comprising a phenoxy alcohol represented by the formula: 2. A liquid bleaching composition or a liquid detergent composition comprising the phenoxy alcohol represented by the general formula (I) according to claim 1 and having a viscosity increased to about 10 cp or more.