JP2539345B2 - High bulk density granular detergent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a granular detergent composition having a high bulk density, which does not impair the powder appearance of the produced detergent particles and has excellent defoaming properties during rinsing.

2. Description of the Related Art Conventional detergents for clothes have a bulking agent of 0.3 g / cc added by adding an extender (usually Glauber's salt is used) that hardly contributes to the cleaning performance to the composition and spray drying it. It was manufactured as bead-shaped hollow particles.

However, since such detergents have a low specific gravity and a low concentration of activator, they are costly to transport and require a large amount of space for storage and display. It was Therefore, recently, a method for producing a high bulk density granular detergent which can be washed with a small amount of detergent has been proposed (JP-A-60-96698) and has been put on the market.

On the other hand, sulfonic acid salts of fatty acid lower alkyl esters are surfactants having excellent detergency, especially hard water resistance,
A high bulk density detergent composition containing the same has been reported (Japanese Patent Laid-Open No. 62-597).

However, a high bulk density detergent containing a sulfonate of a fatty acid lower alkyl ester has a problem that the powdery appearance of the detergent particles is poor and the foaming at the time of rinsing is poor.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides a high bulk density granular detergent composition which does not impair the powder appearance of detergent particles and is excellent in defoaming during rinsing.

Composition of the Invention The high bulk density granular detergent composition of the present invention comprises the following (a),
Containing components (b) and (c), the fatty acid residue of component (a) has 16 or more carbon atoms of 40%, and the total of 12 or less carbon atoms and 18 or more carbon atoms is 20% or less. Characterize.

(A) Sulfonate of fatty acid lower alkyl ester having 6 to 22 carbon atoms in fatty acid residue: 5 to 30% by weight.

(B) Fatty acid salt having 6 to 22 carbon atoms: 0.1 to 10% by weight.

(C) Salt of fatty acid sulfonate having 6 to 22 carbon atoms in fatty acid residue: 0.3 to 3% by weight.

 Hereinafter, the present invention will be described in more detail.

The sulfonate of the fatty acid lower alkyl ester as the component (a) is typically represented by the following general formula (I), which is α
-Also called sulfo fatty acid ester salt.

(R ¹ : alkyl group R ² : lower alkyl group of about C _1-3 M: counter ion) As the counter ion, a water-soluble salt is used, and an alkali metal salt, especially a sodium salt is preferable.

Sulfonates of saturated fatty acid lower alkyl esters are
After transesterification or esterification of a fatty acid to obtain a fatty acid lower alkyl ester of a predetermined number of carbon atoms, the ester is reacted with a sulfonating agent such as sulfuric anhydride using a normal sulfonating apparatus, and ripened and bleached as necessary. Then, it is obtained by neutralization. It can also be obtained by converting a sulfonated fatty acid into a lower alkyl ester.

Further, a sulfonate of an unsaturated fatty acid lower alkyl ester is also used, and is produced in the same manner as described above using an unsaturated fatty acid having a predetermined carbon number as a starting material.

As the raw material fatty acid, a fatty acid of a predetermined carbon number derived from animals and plants derived from beef tallow, coconut oil, palm oil and the like, and a synthetic fatty acid are used.

The fatty acid residue of the fatty acid lower alkyl ester sulfonate has 6 to 22 carbon atoms, and it is necessary to have a carbon number distribution satisfying the following conditions.

Of fatty acid residues, those having 16 carbon atoms occupy 40% or more, preferably 50%.

The total number of fatty acid residues having 12 or less carbon atoms and 18 or more carbon atoms is 20% or less, preferably 15% or less.

The component (a) is incorporated in the detergent composition in an amount of 5 to 30% by weight, preferably 8 to 25% by weight. If the content is less than 5% by weight, sufficient detergency cannot be obtained, while if it exceeds 30% by weight, production becomes difficult.

Component (b) has 6 to 22 carbon atoms, preferably carbon number
A fatty acid salt of 10 to 20 (soap) is used. As the salt, water-soluble salts such as alkali metal salts such as sodium and potassium are used. The fatty acid salt is 0.1% in the detergent composition.
-10 wt%, preferably 0.5-8 wt%. If the blending amount is less than 0.5% by weight, the defoaming property during rinsing deteriorates. On the other hand, if it exceeds 10% by weight, the foaming property during cleaning is deteriorated, which is not preferable.

The sulfonate salt of fatty acid as the component (c) has 6 to 6 carbon atoms.
It is obtained as a di-salt (fatty acid salt, sulfonate) by sulfonation neutralization of 22, preferably 10 to 18 fatty acids.

The content of the component (c) in the detergent composition is 0.3 to 3% by weight, preferably 0.5 to 3% by weight. Compounding amount
If it is less than 0.3% by weight, the defoaming property is not improved.

The high bulk density detergent composition of the present invention has the above (a),
In addition to the essential components of (b) and (c), other components such as other surfactants and builders can be contained.

Examples of the anionic surfactant include the followings.

1) a linear alkylbenzene sulfonate having an alkyl group having an average carbon number of 8 to 16; 2) an α-olefin sulfonate having an average carbon number of 10 to 20; 3) an alkyl sulfate having an average carbon number of 10 to 20; ) Alkyl ether sulfates or alkenyl ether sulfates having a linear or branched alkyl or alkenyl group having an average carbon number of 10 to 20 and having an average of 0.5 to 8 mol of ethylene oxide added thereto, and anionic surfactants thereof. Alkali metal salts such as sodium and potassium are usually suitable as the counterion.

The following are suitable as the nonionic surfactant.

(1) An EO-added nonionic surfactant obtained by adding 4 to 25 mol of ethylene oxide (EO) on average to a primary or secondary alcohol having 8 to 18 carbon atoms.

(2) EO-PO-added nonionic surfactant obtained by adding an average of 4 to 25 mol of ethylene oxide (EO) and an average of 3 to 15 mol of propylene oxide (PO) to a primary or secondary alcohol having 8 to 18 carbon atoms. Agent.

Furthermore, zeolite (aluminosilicate), inorganic builders such as sodium tripolyphosphate and sodium pyrophosphate; sodium citrate, sodium ethylenediaminetetraacetate, nitrilotriacetic acid salt, sodium polyacrylate, sodium acrylate-sodium maleate anhydrous Calcium ion trapping builders such as polymers and polyacetal carboxylates; alkali builders such as carbonates and silicates; antifouling agents such as carboxymethylcellulose and polyethylene glycol; paratoluenesulfonates, toluenesulfonates, xylenesulfonates ,
Viscosity modifiers such as urea; enzymes such as protease, lipase, cellulase, amylase (especially alkaline lipase having activity in alkaline atmosphere); quaternary ammonium salts, softening agents such as bentonite; bleaching agents, fluorescent agents, fragrances , Dyes, etc. can be used.

The detergent composition of the present invention has a bulk density obtained by granulating the above components.
It is obtained by using a high bulk density composition of 0.5 to 1.2 g / cc. As this granulation method, as described in JP-A-62-597, a detergent raw material such as a fatty acid lower alkyl ester sulfonate is kneaded and mixed with a kneader, and a cutter mill type or the like is used. It is obtained by crushing and granulating with a crusher and further mixing with water-insoluble fine powder. Alternatively, a part or all of the detergent components may be previously spray-dried, and the spray-dried product may be kneaded and mixed with the remaining detergent components to produce a high-bulk-density granular detergent composition. Components such as enzymes may be powder blended with a granular detergent.

EFFECTS OF THE INVENTION According to the present invention, (a) a sulfonate of a fatty acid lower alkyl ester having a specific carbon number distribution, (b) a fatty acid salt, and (c) a salt of a fatty acid sulfonate are used in combination in specific amounts. It is possible to realize a granular detergent composition having a high bulk density, which does not impair the powder appearance of the detergent particles and promptly loses bubbles during rinsing to exhibit good defoaming properties.

Hereinafter, the effects of the present invention will be specifically described with reference to Examples, but prior to this, evaluation evaluations used in Examples will be shown.

[Evaluation method of foam breakability]

Table-1: Organic Soil Composition Soil content (wt%) Palmitic acid 15.0 Myristic acid 5.0 Oleic acid 13.4 Squalene 8.1 Paraffin (mp: 52-54 ℃) 8.1 Cholesteryl stearate 8.1 Tristearin 8.9 Triolein 16.7 Cholesterol 16.7 A 10 wt% benzene solution of organic dirt shown in Table-1 was evenly applied to a cotton-skin shirt so that the weight of the fiber was 0.1 wt%.
Air-dried to make a cotton shirt with dirt.

In a fully automatic washing machine (Matsushita Electric Co., Ltd., Aizuma No. 45), prepare 0.0833% tap water solution of the sample detergent composition, and put the above-mentioned soiled cotton skin shirt as the cloth to be washed in it. Bath ratio
Washed according to standard conditions at 1:30 at 20 ° C.

After washing the cloth for 3 minutes according to the standard conditions,
After rinsing for 1 minute, dehydration was carried out for 3 minutes again, rinsing was carried out for 2 minutes, and the foam residue at the end of rinsing was evaluated according to the following criteria, and the rinsability was obtained.

1 point; a lot of foam residue 2 points; a little foam residue 3 points; little foam residue 4 points; a lot of foam residue 5 points; no foam residue [Powder chromaticity evaluation method] Sample powder The powder whiteness (b
Value) is a colorimetric color difference meter model Z-1001DP manufactured by Nippon Denshoku Co., Ltd.
It was measured at.

The above performance evaluation results, together with the composition of the detergent composition,
The results are shown in Table 2 below.

Example Each component (excluding enzymes) shown in Table 2 below was kneaded with a kneader, and the resulting intimate mixture pellet (2 cm square) and a type A zeolite were disintegrated (Okada Seiko, Speed Mill ND-30).
Type). At this time, 15 ℃ with this crushed material
Cold air was introduced at a ratio of 15 / kg of crushed material. Crusher diameter
The 15cm solution cracking blades rotating at 3000rpm cross four stages, the screen with 2 mm ^phi, opening ratio of 20% punching metal.

Next, the crushed product and A-type zeolite with an average temporary particle size of 3 μm were quantitatively fed to a rolling drum (D = 30 cm ^φ , L = 60 cm) at a ratio of 97: 3, and coated product at 30 rpm and a residence time of 5 minutes. Was discharged to obtain a high bulk density detergent composition (0.78 g / cc).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 63-154799 (JP, A) JP 62-43500 (JP, A) JP 60-13894 (JP, A) JP 62- 240391 (JP, A)

Claims (1)

(57) [Claims] 1. A sulfonic acid salt of a fatty acid lower alkyl ester having 6 to 22 carbon atoms in a fatty acid residue: 5 to 30% by weight, and (b) a fatty acid salt having 6 to 22 carbon atoms: 0.1 to 10% by weight. And (c) a fatty acid sulfonate salt of a fatty acid residue having 6 to 22 carbon atoms: 0.3 to 3% by weight, and the fatty acid residue of the component (a) has 16 carbon atoms.
40% or more, and the total of 12 or less and 18 or more carbon
A high bulk density granular detergent composition comprising 20% or less.