JPS62277498A - Liquid detergent composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] The present invention relates to a liquid detergent composition with excellent phase stability.

[Conventional technology]

Liquid detergents generally have better solubility in water than powder detergents and can be used in a wide temperature range from low to high temperatures, but on the other hand, they have poor cleaning power and poor solution stability, i.e.
precipitation, gelation, and consolidation at low temperatures; separation at high temperatures;
There was a problem that precipitation was likely to occur. In particular, systems containing conventional hydratable organic solvents had insufficient stability at high temperatures.

Many studies have been conducted to solve these problems. For example, JP-A-52-82909 discloses cleaning power containing anionic activators and/or nonionic activators, higher fatty acid salts, lower alkylbenzene sulfonates, inorganic building blocks, polyvalent carboxylic acid salts, and low high temperature stability. The present invention relates to a liquid detergent composition with excellent properties.

JP-A-58-65795 discloses a water-soluble activator containing a nonionic activator and/or anionic activator, a polyacrylic acid water-soluble salt having a specific Ca ion-trapping ability, and a lower alkylbenzenesulfonic acid-based solubilizer. This invention relates to a liquid detergent composition that has improved storage stability of polyacrylate and has excellent cleaning power, especially against mud stains.

Moreover, JP-A-60-141798 discloses a liquid detergent with good storage stability, which contains an anionic activator, a polycarboxylic acid polymer, and a solubilizer, and whose pH is adjusted to 7 to 14. Regarding the composition.

[Problem that the invention seeks to solve]

On the other hand, when a polymer builder such as water-soluble polyacrylate is added to enhance the cleaning power of liquid detergent, storage stability tends to deteriorate, and a specific solubilizer is required to solve this problem. However, the storage stability was still not necessarily sufficient. This deterioration tendency becomes more pronounced when the surfactant concentration is increased for concentration, or when an anionic surfactant and a nonionic surfactant are used together to enhance detergency.

[Means for solving problems]

As a result of extensive studies, the present inventors have discovered that all of the above problems can be solved by using a specific polymer, and have completed the present invention.

That is, the present invention comprises (1) fa) an anionic activator and (1) a nonionic activator (
a)/(b) = 3/1 to 1/3 weight ratio, and (a)
+ (bl = 15 to 50% by weight, (c) A water-soluble salt or α of a polymer of α, β unsaturated carboxylic acid having an average molecular weight of 3000 or less and using an organic mercaptan having 6 to 18 carbon atoms as a telogen.

Contains 0.1 to 10% by weight of a water-soluble salt of a copolymer of a β-unsaturated carboxylic acid and a copolymerizable vinyl monomer, and 1 to 10% by weight of a (di-solubilizing agent) to provide phase stability. The present invention provides an excellent liquid cleaning composition.

As the anionic surfactant (al component) of the present invention, one or more selected from the following (1) to (8) can be used. Particularly preferred among them are (1), (2), and (3).
), (4) and (5).

(1) Straight chain or branched chain alkylbenzene sulfonate having an alkyl group having an average carbon number of 10 to 16.

(2) Contains a linear or branched alkyl group or alkenyl group with an average of 10 to 20 carbon atoms, with an average of 0.5 to 20 carbon atoms per molecule.
Alkyl or alkenyl ether sulfate with 8 moles of ethylene oxide or propylene oxide or butylene oxide or ethylene oxide/propylene oxide or ethylene oxide/butylene oxide.

(3) An alkyl or alkenyl sulfate having an alkyl or alkenyl group having an average carbon number of 10 to 20.

(4) Olefin sulfonate having an average of 10 to 20 carbon atoms in one molecule.

(5) Alkanesulfonate having an average of 10 to 20 carbon atoms in one molecule.

(6) Having an alkyl group or alkenyl group with an average carbon number of 10 to 20, and an average of 0.5 to 8 moles per molecule of ethylene oxide, propylene oxide, butylene oxide, ethylene oxide/propylene oxide, ethylene oxide/butylene Oxide-added alkyl or alkenyl ether carboxylate.

(7) α-sulfo fatty acid salt or ester R-ClIC0□Y O3Z represented by the following formula [wherein Y is an alkyl group having 1 to 3 carbon atoms or a counter ion, Z
is the counterion. R represents an alkyl group or alkenyl group having 10 to 20 carbon atoms. ] Here, the counter ions of the anionic surfactant include alkali metal ions such as sodium and potassium, alkaline earth metal ions such as calcium and magnesium, ammonium ions, and 1 to 3 alkanol groups having 2 or 3 carbon atoms. Examples include alkanolamines (eg, monoethanolamine, jetanolamine, triethanolamine, triisopropanolamine, etc.).

As the nonionic surfactant which is the (bl component) of the present invention, one or more selected from the following (11 to (8)) can be used. Particularly preferred among them are (1), (2) and (
5).

(1) Polyoxyethylene alkyl or alkenyl ether containing an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 moles of ethylene oxide is added.

(2) having an alkyl group with an average carbon number of 6 to 12, and 1 to 2
Polyoxyethylene alkylphenyl ether with 0 moles of ethylene oxide added.

(3) Polyoxypropylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which 1 to 20 mol of propylene oxide is added.

(4) Polyoxybutylene alkyl or alkenyl ether having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and added with 1 to 20 moles of butylene oxide.

(5) A nonionic activator having an alkyl group or alkenyl group having an average carbon number of 10 to 20 and to which a total of 1 to 30 moles of ethylene oxide and propylene oxide or ethylene oxide and butylene oxide are added.

(6) Higher fatty acid alkanolamide or its alkylene oxide adduct R', 2 R'1□ c in the formula R°1. is an alkyl group or alkenyl group having 10 to 20 carbon atoms, R°1□ is 11 or C113, i is an integer of 1 to 3, and ll13 is an integer of 0 to 3. ] (7) Sucrose fatty acid ester consisting of a fatty acid with an average carbon number of 10 to 20 and sucrose.

(8) Fatty acid glycerin monoester consisting of a fatty acid having an average carbon number of 10 to 20 and glycerin.

(Al component and component (b) are in a weight ratio of 3/1 to 1/3, preferably 2/1 to 1/2, and the total amount is 15 to 50% by weight (hereinafter abbreviated as %), preferably 25% by weight. ~45%. Within this range, a composition with excellent detergency and phase stability can be obtained.

The water-soluble salt of the polymer or copolymer which is the component (C) of the present invention is known as a sequestering agent as described in, for example, JP-A-59-91184 and US Pat. No. 3,922,230. be.

Here, examples of organic mercaptans used as telogens include hexyl, octyl, decyl, dodecyl, and tetradecyl.

Mercaptans such as hexadecyl and octadecyl, 2
-Hydroxy-dodecylmercaptan, dodecylhenzenol, and the like.

The α,β-unsaturated carboxylic acid used in the present invention has the following general formula (
Represented by [).

Z C=C(1) Y C00)I [wherein, X, Y, and Z are each -IL -C11,, -
Indicates COOIL-011 or -C1lzCOOII. ] Examples of the salt of the α,β-unsaturated carboxylic acid polymer represented by the general formula (1) include acrylic acid, methacrylic acid,
Examples include salts of 2-hydroxyacrylic acid, fumaric acid, maleic acid, itaconic acid, aconitic acid, citraconic acid, and the like.

Furthermore, vinyl monomers such as ethylene, styrene, butadiene, isobutylene, diisobutylene, methyl vinyl ether, vinyl acetate, vinylpyrrolidone, and acrylonitrile can also be used as comonomers.

In the present invention, the alkali metals constituting the water-soluble salt of the polymer or copolymer include sodium, potassium, and lithium, and the amines include ammonia, mono-, di-, or tri-ethanolamine, morpholine, etc. Naturally, the salt may be partial salt.

The average molecular weight of the water-soluble salt of these polymers or copolymers is 3000 or less, preferably 5000 or less, from the viewpoint of solubility.
~2000. Furthermore, the polymerized portion accounts for 95% of the entire molecule.
Below, it is particularly desirable that it be less than 90%.

The blending amount of component (c) is 0.1 to 10%, preferably 0.1% to 10%.
It is 5-5%. If it is less than 0.1%, there will be no phase stability effect, and if it exceeds 10%, the phase stability will deteriorate.

The present invention requires a solubilizer as a (cl) component for phase stabilization.

Examples of solubilizers include lower alcohols such as ethanol, lower alkylbenzenesulfonates such as benzenesulfonates and p-toluenesulfonates, glycols such as propylene glycol, acetylbenzenesulfonates, acetamides, Solubilizing agents such as pyridine dicarboxylic acid amides, benzoates, and urea may be mentioned, but are not particularly limited.

The solubilizer is usually used in an amount of 1 to 10%. If it is less than 1%, the viscosity-reducing effect and anti-caking effect at low temperatures cannot be fully exerted, and if it exceeds 10%, precipitation tends to occur at high temperatures. In particular, ethanol is preferable because it is useful for preventing bacteria generated during long-term storage of liquid detergents. Ethanol is preferably used in a range of 3 to 7%.

In addition, as optional components, enzymes such as protease, amylase, lipase, and cellulase, enzyme stabilizers such as calcium chloride, fluorescent dyes, fragrances, and the like may also be included within the usual range.

〔Example〕

The present invention will be explained in more detail below with reference to Examples, but the present invention is not limited to these Examples.

Example 1 The following samples were prepared and the evaluation results are shown in Table-1.

Ethanol 5 Water
Water balance evaluation was performed based on the following criteria.

(11 Phase Stability After each sample was prepared, it was placed in a screw tube with a diameter of 4 cm and a height of 1 oc 111, and was stored at -5°C, room temperature, and 40'C for 1 month, and then evaluated.

○: Uniform-transparent liquid ×: Precipitation, turbidity, and separation occurred.

(2) Detergent power test Five 10 cm x 10 cm mud-stained cotton cloths 9 (artificially contaminated cloths) were placed in detergent aqueous solution 1β and washed with a turbotometer at 100 rpa+ under the following conditions.

The washing conditions are as follows.

(Washing conditions) Washing time: 10 minutes Washing concentration: 0.133% Water hardness: 4°Dl + Water temperature: 20”C Sugi Sugi 5 minutes with tap water The cleaning power is based on the reflectance of the original cloth before contamination and the contaminated cloth before and after cleaning. It was measured with a self-recording colorimeter (manufactured by Shimadzu Corporation), and the cleaning rate (%) was determined using the following formula.

(The table shows the average value measured for 5 sheets).

] Takashi) Mud soil contaminated cloth (artificially contaminated cloth) Akadama soil for Kanuma gardening was dried at 120'C ± 5℃ for 4 hours, then crushed, 150Mesh (100μo+) Bath stuff was dried at 120℃ ± 5℃ for 2 hours, +150g was pulverized to 10001
The dispersion liquid is removed and excess dirt is removed by contacting and brushing a #2023 gold cloth with the liquid (Japanese Patent Application Laid-open No. 55-26473).

Example 2 The composition of each component was changed as shown in Table 2, and the phase stability and cleaning rate were evaluated in the same manner as in Example 1.

The results are also shown in Table-2.

Claims (1)

[Scope of Claims] (a) an anionic activator and (b) a nonionic activator (a)
)/(b)=3/1 to 1/3 weight ratio and (a)+(
b) = 15 to 50% by weight, (c) a water-soluble salt of a polymer of α,β unsaturated carboxylic acid or an α,β unsaturated carboxylic acid having an average molecular weight of 3000 or less and using an organic mercaptan having 6 to 18 carbon atoms as a telogen; 0.1 to 10% by weight of a water-soluble salt of a copolymer of a saturated carboxylic acid and a copolymerizable vinyl monomer, and (d) 1 to 10% of a solubilizer.
% by weight.