JPH02178398A - High-bulk density detergent composition - Google Patents

Abstract

PURPOSE:To obtain the title composition showing excellent cleaning performances with a small amount of detergent used, containing an anionic surfactant, nonionic surfactant and crystalline lamellar sodium silicate. CONSTITUTION:The aimed composition containing (A) preferably 20-50wt.% anionic surfactant comprising, an olefinsulfonate, an alkylbenzenesulfonate, an alkyl sulfate, etc., (B) preferably 0.5-15wt.% alcohol ethoxylate, nonylphenol ethoxylate or fatty acid alkanolamide and (C) preferably 3-45wt.% crystalline lamellar sodium silicate preferably shown by the formula (M is Na or H; x is 1.9-4; y is 10-20).

Description

[Detailed description of the invention] 1 fruit divided into upper trays The present invention relates to high bulk density detergent compositions.

In recent years, due to the problem of eutrophication of environmental waters, the amount of condensed phosphates contained in household heavy detergents has been significantly reduced or eliminated, and now phosphorus-free detergents using zeolite as a builder are now available. has come to dominate. This zeolite removes calcium ions, which are the hardness component in the washing liquid, by ion exchange and prevents the anionic surfactant from turning into a dissolvable calcium salt and reducing the washing power.

In addition, so-called polymer builders such as polyacrylates and copolymers of maleic anhydride and olefin are used together with zeolites as phosphorus-free calcium ion-trapping builders other than zeolites.

However, it is desired to further improve the detergency, and studies have been conducted from the viewpoint of surfactants, builders, and additives such as enzymes.

Furthermore, in conventional laundry detergents, a bulking agent (usually glauber's salt is used) that hardly contributes to cleaning performance is added to the composition, and this is then spray-dried to a bulk density of 0.3 g.
It was manufactured as bead-like hollow particles of about 1.0 cm/cc.

However, such detergents have a low specific gravity and a low active agent concentration, which increases transportation costs and requires a considerable amount of space for storage and display.Furthermore, even in ordinary households, it is difficult to find a place to store them and it is difficult to measure them. Ta. So recently,
A method for producing a high bulk density granular detergent that can be cleaned with a small amount of detergent has been proposed (Japanese Patent Laid-Open No. 60-96698).

It is also upholstered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a high bulk density granular detergent composition with excellent cleaning performance.

l sucking animals The high bulk density detergent composition of the present invention has the following (a).

It is characterized by containing components (b) and (c).

(a) Anionic surfactant.

(b) Nonionic surfactant.

(c) Crystalline layered sodium silicate.

The present invention will be explained in more detail below.

As the anionic surfactant of component (a), olefin sulfonate, alkylbenzene sulfonate, alkyl sulfate, alkyl ethoxy MtM salt, α-sulfo fatty acid ester salt, fatty acid salt (soap), etc. are used.

Component (a), an anionic surfactant, is present in the detergent composition.
It is preferable to mix it in an amount of 0 to 50% by weight.

Nonionic surfactants as component (b) include alcohol ethoxylates obtained by adding ethylene oxide to alcohols, nonylphenol ethoxylates, adducts obtained by adding propylene oxide and ethylene oxide to alcohols, fatty acid alkanolamides, sucrose fatty acid esters, alkyl Amine oxide etc. are used.

(b) Component nonionic surfactant is present in the detergent composition.
．． It is desirable to blend it in an amount of about 5 to 15% by weight.

The crystalline layered sodium silicate of component (c) preferably has a composition represented by the following general formula (1).

N a M Si X○zx+t '3' Hz
O"' (1) (M: sodium or hydrogen x: 1.9-4 y: 0-20) This crystalline layered sodium silicate is
7895, and its synthesis method is described in, for example, Phys, Chant, Glassesy.
7y127-138 (1966), Z, Kris
tallogr,, 129.396-404 (196
9).

Such crystalline sodium silicate is δ-Na2Si2
Na-5KS-6゜β-N a 2 S similar to 05
It can be obtained as Na-8KS-7 (both manufactured by Hoechst), which is similar to 1205.

Component (c) is preferably blended into the cleaning composition in an amount of 3 to 45% by weight.

Since crystalline layered sodium silicate has the property of being soluble in water, it is necessary to avoid contact with large amounts of water for a long period of time in the manufacturing process of detergent compositions.

The detergent composition of the present invention comprises the above (a), (b), (
In addition to the three essential components c), other surfactants such as amphoteric surfactants and cationic surfactants may be used as necessary.

Builders such as alkali builders and calcium ion scavenging builders, enzymes, bleaching agents, and other additives can also be blended.

The detergent composition of the present invention is produced as a high bulk density granular detergent in which the detergent components are filled to the inside of the detergent particles, as disclosed in Japanese Patent Application Laid-Open No. 60-96698.

A high bulk density detergent composition preferably has a bulk density of 0.5 to 1.2 g/m.
As described in JP-A-60-96698 and JP-A-62-597, each detergent component is kneaded with a kneader,
After mixing, it is crushed and granulated using a cutter mill type crusher, and then it can be manufactured by coating with water-insoluble fine powder. It is also possible to supply some or all of the detergent ingredients in the form of a spray-dried product and to knead it.

The crystalline layered sodium silicate as component (c) is preferably mixed into powder after the above-mentioned crushing and granulation.

In addition, when preparing spray-dried detergent particles and stirring and granulating them while spraying a binder such as a nonionic surfactant to form high bulk density detergent particles, component (c), crystalline layered sodium silicate, is added. May be added. Of course, after completion of stirring and granulation, crystalline layered sodium silicate may be powder-mixed with the obtained high bulk density detergent particles.

According to the present invention, a high bulk density detergent composition is obtained by blending (a) an anionic surfactant, (b) a nonionic surfactant, and (c) crystalline layered sodium silicate. ,
Excellent cleaning performance can be obtained.

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

[How to evaluate cleaning power]

(i) Preparation of artificial stain A clay whose main component is crystalline minerals such as kaolinite and vermiculite was dried at 200° C. for 30 hours and used as an inorganic stain.

After dissolving 3.5 g of gelatin in 950 cc of water at about 40'C, use Polytron (Swiss K), a powerful emulsifying dispersion machine.
0.25 g of carbon black was dispersed in water using a carbon black (manufactured by INEMATICA). Next, 14.9 g of inorganic dirt was added and emulsified with Polytron, and 31.35 g of organic dirt was added.
g was added and emulsified and dispersed using a Polytron to create a stable dirt bath. IOC in this filth bath! After soaking a specified cleaning cloth (cotton cloth No. 60 designated by Japan Oil Chemists' Association) measuring 20 cm in size, the water was squeezed out using two rubber rolls to equalize the amount of dirt attached. After drying this soiled cloth at 105° C. for 30 minutes, both sides of the soiled cloth were rubbed 25 times on each side. This was cut into 5cm x 5cm pieces with a reflectance in the range of 42±2% and used as a dirty cloth. The soil composition of the artificially soiled cloth thus obtained is shown in Table A.

(Margin below) The cleaning power is calculated using the following formula.

Cleaning power evaluation method (it) Cleaning method The washing device is a 2M washing machine (Mitsubishi Electric) "Chikuma J C1l-660W type) was used.

The items to be washed were 10 pieces of the artificial soiled cloth sewn onto a worn skin shirt, weighing a total of 1 kg.

Put 25℃ tap water 3 (H2 in the washing machine, 0.0833
A predetermined amount of the detergent composition and the item to be washed are added so that the detergent concentration is 100%, and the washing is carried out for 10 minutes. After washing, dehydrate for 1 minute,
Next, it was rinsed for 3 minutes, dehydrated for 1 minute, and rinsed for 3 minutes. R is the reflectance of the dirty cloth.
Reflectance (%) measured by Zeiss ELREPHO reflectometer.

The detergency was evaluated using the average value of 10 artificially soiled cloth samples.

A detergent slurry with a solid content of 45% was prepared using each component except for the nonionic surfactant, enzyme, and fragrance from the high bulk detergent particle composition shown in Table 1 below. This detergent slurry was dried using a countercurrent spray drying tower at a hot air temperature of 380° C. to a moisture content of 5% to obtain a spray-dried product.

This spray-dried product has an average particle size of 350 μm and a bulk density of 0.3.
The fluidity was also good, with an angle of repose of 5 g/cc and 45 degrees.

Next, the above dried product, nonionic surfactant and water were added,
The mixture was introduced into a continuous kneader (manufactured by Kurimoto Iron Works, KRC 21-da I2 type) to obtain a dense and uniform kneaded product.

A perforated plate (thickness: 10 mm) with 80 holes of 5 Iφ was installed at the outlet of this kneader, and the kneaded material was placed in a size of about 5 mφ×
It was made into a 10 m cylindrical pellet.

These pellets are crushed with twice the amount (weight ratio) of 15℃ cooling air (speed mill ND-10 model, Okada Seiko ■
) was introduced.

The crusher had cutters with a length of 15 aa arranged in four cross stages, rotated at 3000 rpm, and the screen was made of 360 degree punched metal. Three stages of this crusher are connected in succession, and the hole diameter of the screen at each stage is set to 3.5.
+1IIIφ, 2nd stage: 2mmφ, 3rd stage: 1.5m
It was set as nφ. After the particles passed through three stages of crushers were separated from the cooling air, a perfume was sprayed on them to obtain detergent particles having the composition shown in Table 1 below and having a bulk density of 0.8 g/cc.

To this, enzyme and 5% or 10% by weight based on the detergent particles are added.
A detergent composition of the present invention was prepared by adding 5KS-6 (crystalline layered sodium silicate) in an amount of % by weight, and its detergency was evaluated.

The results are as follows, showing excellent cleaning performance.

5% by weight 80 10% by weight 82 (Hereafter the margins) - JLJI The same procedure as in Example 1 was carried out except for changing the type and amount of the anionic surfactant. &2~ shown in Postscript Cloth-2
9 detergent particles were prepared and 5KS-
A detergent composition of the present invention was obtained by adding 7% by weight or 15% by weight of 6 to the detergent particles, respectively.

When the cleaning performance of these detergent compositions was evaluated, the cleaning power was 80% and 82%, respectively, and both were found to have the same excellent cleaning power as Example 1.

(Margins below) - Nα1 shown in Cloth-3 below in the same manner as in Example 1 except for changing the type and blending amount of the nonionic surfactant.
Detergent particles 1 to 16 were prepared and 5
KS-6 at 5% by weight or 1% by weight based on the detergent particles, respectively.
A detergent composition of the present invention was obtained by adding 0% by weight.

When the cleaning performance of these detergent compositions was evaluated, they were all found to have the same excellent cleaning power as Example 1.

(Blank below) Detergent particles of NQ21 to 30 shown in Postscript Cloth-4 were prepared in the same manner as in Example 1 except that the type and blending amount of the L-tip builder were changed. Similarly, 5KS-6 was added in an amount of 5% by weight or 10% by weight based on detergent particles to obtain a detergent composition of the present invention.

When the cleaning performance of these detergent compositions was evaluated, they were all found to have the same excellent cleaning power as Example 1.

(The following is a blank space) Tip-"L""i The same procedure as in Example 1 was carried out except that the type and amount of bleaching agent was changed, and Na31 to
39 detergent particles were prepared and 5KS were prepared in the same manner as in Example 1.
A detergent composition of the present invention was obtained by adding 5% by weight or 10% by weight of -6 to the detergent particles, respectively.

When the cleaning performance of these detergent compositions was evaluated, they were all found to have the same excellent cleaning power as Example 1.

(Left below) Sue J! 11 Detergent particles of Nα41 to 44 shown in Cloth-6 below were prepared in the same manner as in Example 1, except for changing the type and amount of the so-called enzyme, and 5KS-6 was added to the detergent in the same manner as in Example 1. A detergent composition of the present invention was obtained by adding 5% by weight or 10% by weight of each to the particles.

When the cleaning performance of these detergent compositions was evaluated, they were all found to have the same excellent cleaning power as Example 1.

(The following is a blank space) - "L-Group 1-" Na51 to 5 shown in Table 7 below was prepared in the same manner as in Example 1 except for changing the types and amounts of other additives.
8 detergent particles were prepared and 5KS-
A detergent composition of the present invention was obtained by adding 5% by weight or 10% by weight of 6 to the detergent particles, respectively.

When the cleaning performance of these detergent compositions was evaluated, they all had the same excellent cleaning power as Example 1.

Admitted.

(Margin below)

Claims (1)

[Claims] 1. (a) Anionic surfactant. (b) a nonionic surfactant, and (c) Crystalline layered sodium silicate A high bulk density detergent composition comprising: