JPH0776360B2 - Granular detergent composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to a granular detergent composition which has good foaming properties, excellent rinsability, and excellent anti-soil redeposition effect.

Conventional technology So far, anionic surfactants, especially α-olefin sulfonates or ethoxylated alcohol sulfates (alkyl ether sulfates) that are calcium-insensitive surfactants.
In a detergent composition containing, for example, as a main component, much effort has been made to improve its rinsability. For example, in the old days, attempts have been made to improve rinsability by blending fatty acid soap. However, it is necessary to use a large amount of fatty acid soap in order to improve the rinsability, and there is a drawback that the dirt component detached during washing adheres to clothes again, that is, the redeposition property increases. .

Japanese Unexamined Patent Publication (Kokai) No. 61-89299 discloses a detergent composition in which a specific polyoxyethylene propylene alkyl ether is combined with a fatty acid soap and zeolite to improve mud dirt cleaning power and rinsability.

However, although this polyoxyethylene propylene alkyl ether is excellent in the effect of improving rinseability,
It had the drawback of reducing foaming during washing when combined with soap.

OBJECT OF THE INVENTION The present invention provides a granular detergent composition which has an excellent effect of improving rinsing, suppresses a decrease in foaming during washing as much as possible, and has an excellent effect of preventing redeposition.

Composition of the Invention The granular detergent composition of the present invention is characterized by containing the following components (A) to (D).

(A) Anionic surfactant: 5 to 30% by weight, (B) Nonionic surfactant represented by the following general formula (I): 0.5 to 10% by weight, (In the formula, R ₁ and R ₂ are an alkyl group or an alkenyl group having 1 to 15 carbon atoms, the sum of the carbon numbers of R ₁ and R ₂ is 7 to 17, and PO is a propylene oxyside group. , EO is an ethyleneoxyside group, n and m are average addition mole numbers, n is 0.5 to 10 and m is 3 to 15.) (C) Total carbon number is in the range of 12 to 22. Fatty acid soaps in: 0.5
˜5% by weight, (D) Zeolite: 5 to 30% by weight Hereinafter, the present invention will be described in more detail.

Examples of the component (A) surfactant include the following, and one or more of these may be used.

-A straight-chain alkylbenzene sulfonate having an alkyl group having an average carbon number of 10 to 16-An olefin sulfonate having an average carbon number of 10 to 20-A linear or branched alkyl group or alkenyl having an average carbon number of 10 to 20 Alkyl ether sulphate or alkenyl ether sulphate having a group and an average of 0.5 to 8 mol of ethylene oxide added, -alkyl sulphate having an alkyl group having an average of 10 to 20 carbon atoms, -represented by the following general formula Α-sulfo fatty acid salt or α
-Sulfo fatty acid ester salt (In the formula, Y is an alkyl group or counter ion having 1 to 3 carbon atoms, and R is an alkyl group or alkenyl group having 10 to 22 carbon atoms.) (A) Anionic surfactant is the granular detergent composition of the present invention. 5 to 30% by weight, preferably 15 to 25% by weight, is incorporated into the product. If the content is less than 5% by weight, good detergency as a detergent cannot be obtained, and if it exceeds 30% by weight, good rinsability cannot be obtained, which is not preferable.

As the nonionic surfactant as the component (B), the specific polyoxypropylene polyoxyethylene alkyl ether represented by the general formula (I) can be obtained. This polyoxypropylene polyoxyethylene alkyl ether is a propylene oxide (P
O) and ethylene oxide (EO) are block-polymerized in the order of PO and EO by the respective addition mole numbers. The number of moles of PO added is 0.5 to 10, preferably 3 to 7.
Is the range.

When the number of moles of PO added is less than 0.5, good rinsability cannot be obtained, and when it exceeds 10, the foaming is significantly reduced, which is not preferable. The average number of moles of EO added is 3 to 15, preferably 7 to 12.
Is the range.

When the number of moles of EO added is less than 3 or exceeds 15, it is not preferable because a good recontamination preventing effect cannot be obtained.

Further, it is not preferable to use a nonionic surfactant in which EO and PO are added to the secondary alcohol in this order because foaming during cleaning becomes insufficient and the anti-soil redeposition effect is deteriorated.

The nonionic surfactant (B) is contained in the detergent composition in an amount of 0.5 to 10
The content is in the range of 1% by weight, preferably 1 to 5% by weight.
If this amount is less than 0.5% by weight, a good recontamination preventing effect cannot be obtained, and if it exceeds 10% by weight, foaming during washing is significantly reduced, which is not preferable.

As the fatty acid soap as the component (C), an alkali metal salt of a saturated or unsaturated fatty acid having an average carbon number of 10 to 22 is used, preferably a sodium salt.

The fatty acid soap (C) is contained in the detergent composition of the present invention in an amount of 0.5 to 0.5%.
5% by weight, preferably 1-4% by weight. If this amount is less than 0.5% by weight, satisfactory rinsability cannot be obtained, and if it exceeds 5% by weight, the recontamination preventing effect is remarkably deteriorated, which is not preferable.

(D) Zeolite is at least 140mgCaC
O _3/1 g has an ion exchange capacity (dry matter basis), average particle size below 7 [mu] m, preferably 1μm or less, crystallinity 0-100
%, Preferably 80% or more is suitable, and A-type zeolite is preferably used.

The content of (D) zeolite is 5 to 30 in the detergent composition.
% By weight, preferably in the range 10 to 20% by weight. If the amount is less than 5% by weight, sufficient detergency cannot be obtained, and if it exceeds 30% by weight, the viscosity of the detergent slurry increases.
It is not preferable in the detergent manufacturing process.

If necessary, the detergent composition of the present invention further comprises a nonionic surfactant other than the above essential components, a cationic surfactant, a surfactant such as an amphoteric surfactant, an organic or inorganic builder, a sequestering agent, and sodium sulfate. A filler, an enzyme effective for washing, a fluorescent whitening agent, a fragrance and the like can be added, but these are not particularly limited.

Specific examples of the nonionic surfactant include 10 to 10 carbon atoms.
There may be mentioned 20 primary or secondary alcohol ethoxylates. A typical example of the cationic surfactant is hardened beef tallow dialkyl type quaternary ammonium chloride. These surfactants can be used within a range that does not impair the effects of the present invention. Examples of the builder include carbonates, inorganic builders such as silicates, nitrilotriacetates, ethylenediaminetetraacetates, aminopolyacetates such as diethylenetriaminepentaacetic acid luster,
Examples thereof include polyvalent carboxylates such as citrates, polyelectrolytes such as polyacrylates and polyitaconates, and examples of enzymes include proteases, lipases, amylases and the like.

Further, if necessary, a recontamination inhibitor such as polyethylene glycol or carboxymethyl cellulose can be added.

EFFECT OF THE INVENTION According to the present invention, a specific polyoxypropylene polyoxyethylene alkyl ether is used as a nonionic surfactant, and by using this together with an anionic surfactant and a fatty acid soap in a specific ratio, foaming at the time of washing is reduced. In spite of the large prevention, the good rinsability is obtained, and the recontamination preventing effect is remarkably improved by the additive action of the nonionic surfactant and the zeolite.

By using the detergent composition of the present invention, it is possible to significantly reduce the amount of water used for washing, and it is also economically advantageous because damage to clothing is significantly suppressed. Suitable as a phosphorus detergent.

Hereinafter, the present invention will be described in more detail with reference to Examples. Prior to this, the evaluation method used in the examples is shown below.

Foaming and defoaming property A 10 wt% benzene solution of organic dirt containing the following dirt components was uniformly applied to a cotton skin shirt so that the weight of the fiber was 0.1 wt%, and after air-drying, evaluation was performed under the following conditions.

Evaluation method Detergent composition 0.14% in a washing machine (spiral type, reversal type)
A tap water solution was prepared. Using the above-mentioned soiled cotton skin shirt as a cloth to be washed, the cloth was washed for 10 minutes at a bath ratio of 1:30 at 25 ° C. according to a normal operation, and the foam height after the washing was measured with a graduated test tube. There were four measurement points, and the average value was taken as the foaming of the detergent composition.

After washing, the washed cloth was dehydrated for 1 minute, rinsed with running water containing no detergent composition (15 / min), and the time required until the bubbles disappeared was measured to determine the defoaming property. .

Recontamination test method 7 skin shirts worn for 2 days, 30 25 x 8 cm cloth sewn on the neck of the shirt to remove the stain on the collar, and cotton and tet for the recontamination test. Take a piece of nylon, acrylic, or polyester cloth in a domestic electric washing machine,
The composition obtained by mixing the detergent with each additive was washed with tap water at 25 ° C. for 10 minutes under the conditions of a detergent concentration of 0.133% and a bath ratio of 30 times. Then, after dehydrating for 1 minute, tap water at 25 ° C for 3
The operation of rinsing for 1 minute and dehydration for 1 minute was repeated twice.

The reflectance of the cloth for recontamination test was measured using a reflectometer (Nippon Denshoku Industries Co., Ltd., colorimetric colorimeter model 1001DP), and the difference ΔR from the reflectance before washing was calculated to determine the recontamination property. evaluated. Δ
When R is 1 or more, visual identification is possible. Table 1 shows the values of the polyester having the highest redeposition property.

Example A granular detergent composition having a composition containing a nonionic surfactant and sodium tallow fatty acid shown in Table 1 below in predetermined amounts was produced by a conventional method.

These detergent compositions were evaluated for foaming at the time of cleaning, foam breakability and anti-redeposition effect, and the results are shown in Table 1.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area C11D 3:12 1:02)

Claims (1)

[Claims] 1. An (A) anionic surfactant: 5 to 30% by weight, (B) a nonionic surfactant represented by the following general formula (I): 0.5 to 10% by weight, (In the formula, R ₁ and R ₂ are alkyl groups or alkenyl groups having 1 to 15 carbon atoms, the sum of carbon numbers of R ₁ and R ₂ is 7 to 17, and PO is a propylene oxide group. , EO is an ethylene oxide group, n and m are average addition mole numbers, n is 0.5 to 10 and m is 3 to 15.) (C) The total carbon number is in the range of 12 to 22. Fatty acid soap: 0.5
A granular detergent composition, characterized in that the granular detergent composition contains 5 to 30% by weight of (D) zeolite: 5 to 30% by weight.