JPS609560B2 - Aqueous detergent slurry - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detergent composition or a liquid cleanser composition for clothing, which improves the viscoelasticity of detergent aqueous slurry or liquid cleanser containing zeolite, and makes them easy to handle and The purpose is to maintain a stable Z state.

Phosphates such as tripolyphosphate have been widely used as detergent builders for clothing, but in recent years it has been pointed out that they are a contributing factor to environmental problems such as eutrophication of lakes and red tide. Since then, the amount of Z phosphate in detergents has been regulated.

For this reason, alkali builders such as silicates, carbonates, and bicarbonates, and organic builders such as citrates have been proposed as builders to replace phosphates. However, although these are effective to some extent when the water hardness is relatively low by 2, they are not necessarily sufficient when the water hardness is high.
The use of zeolite, which has the property of capturing Ca ions in hard water, has been proposed as a pilder that is sufficiently effective even when the water is hard (Samurai Seki 50-1238).
1. Japanese Patent Publication No. 50-10037 & Samurai Seki Sho 50-53404
).

Zeolite is water-insoluble, and when used as a detergent builder in the form of fine particles, the ability to capture Ca ions during washing increases, and it also prevents them from adhering to the items being washed. This is preferable because it makes it less noticeable even if it adheres, but in actual use it is often used as an aqueous suspension of such fine particles. However, zeolite has the property of easily absorbing water.
When suspended in water, the suspension exhibits dilatant viscosity. By the way, granular detergent for clothing is manufactured by making a detergent component and a builder component into an aqueous slurry with a solid content of about 6 t%, and then spray drying this.
When zeolite is used as a detergent builder, the aqueous detergent slurry becomes highly viscous and exhibits strong dilatancy, so when the slurry is allowed to stand still, the zeolite may settle and separate, or when drying the slurry, a uniform mist may form. There are problems such as difficulty.

Methods to avoid such problems include lowering the solid content of the detergent slurry (increasing the water ratio), or mixing zeolite powder into granular detergent that has been spray-dried with other ingredients other than zeolite. However, the method of lowering the solid content ratio not only significantly lowers the drying efficiency but also deteriorates the powder physical properties of the manufactured granular detergent, and in powder mixing, the amount of zeolite added is required for uniform mixing. In that there are restrictions on
Neither method can be said to be good.

Similar problems exist with liquid cleansers containing zeolites, which are more serious because of the extremely long storage and settling times.

As a result of extensive research into the rheological properties of zeolite suspensions, the present inventors have found that by adding a small amount of a certain kind of clay, which is an aluminosilicate that is the same as zeolite, it is possible to create a zeolite suspension. It was discovered that the dilatancy viscosity of the polyester resin can be reduced, and that it also provides thikirotropic viscosity, and based on this knowledge, the present invention was completed. That is, in the present invention, the surfactant is
~4x%, 1 zeolite with average particle size 0.5~10〃
The purpose of the present invention is to provide an aqueous detergent slurry which contains smectite clay in an amount of 0.05 to 0.5 times the weight of zeolite, and which contains smectite clay in an amount of 0.05 to 0.5 times the weight of zeolite. Included are detergent slurries and liquid cleansers that dry into granular detergents.

In the aqueous detergent slurry according to the present invention, an anionic surfactant is generally used as the surfactant component.
Nonionic or amphoteric active agents can also be used. Incidentally, typical anionic activators that can be used in the present invention include (i) alkylbenzene sulfonates in which the alkyl group has 8 to 15 carbon atoms; {o) alkyl sulfates in which the alkyl group has 8 to 18 carbon atoms; Salt, a sulfate salt of an ethoxy compound prepared by adding an average of 1 to 8 moles of ethylene oxide to an alcohol whose alkyl group has 8 to 18 carbon atoms;
Salts obtained by sulfonating ~22 Q-olefins (these are mixtures mainly of alkenesulfonates and hydroxyalkanesulfonates), {obtained from paraffins having 12 to 22 carbon atoms These include alkanesulfonic acid salts, higher fatty acid salts, salts of condensates of higher fatty acids and taurine (N-acylaminoethanesulfonates), and salts of dialkyl esters of sulfosuccinates. Note that alkali metal salts are suitable for these, and magnesium salts are also suitable in the case of sulfonate and sulfate type anion activators. Other activators include nonionic activators such as polyoxyethylene alkyl ether,
Polyoxyethylene alkyl phenol ether, polyoxyethylene fatty acid ester, solpitan fatty acid ester polyoxyethylene ether, sucrose fatty acid ester, fatty acid alkylolamide, etc. can be used.
As the rho-ampholytic surfactant, betaine type, for example, lauryldimethylcarboxymethylammonium betaine, alanine type, and imidazoline type can be used. The surfactant of the present invention may consist of a combination of an anionic and/or anionic or amphoteric surfactant. The blending amount of the surfactant is preferably 1 to 4% by weight. Natural zeolites such as mordenite and clinoptilolite can be used as zeolites, and synthetic zeolites can be used such as A-type, ×-type, and Y-type zeolites. Type A particles, which are particles with a specific surface area close to 4 square cubes, are preferable.

The average particle size is preferably 0.5 to 10. If it is less than 0.5 μm, it is too fine and tends to aggregate in the suspension, and if it exceeds 10 μm, it not only tends to settle and separate in the suspension, but also has the problem of adhesion to clothes when they are washed. So I don't like it.

The amount of zeolite added is preferably 1 to 4%. The smectite clay used in the present invention is a clay whose main component is a clay mineral belonging to the smectite group of aluminum/silicates, and examples of such clay minerals include montmorillonite, zauconite, and nontite. Examples include night, saponite, hectorite, neumiculite, etc., and many of the clays sold commercially under the common name bentonite fall under this category.
Among these, those with high purity and little coloring are preferred.
The smectite clay is used as particles ranging in size from about 5 mm to about 800 mm, more preferably from about 50 Å (Tyler standard 270 mesh opening) to about 500 mm (32 mesh opening). The blending amount of smectite clay is 0.05 to 0.0% relative to the blending amount of zeolite.
A range of 5 (weight ratio) is good. If it is less than 0.05, the effect will not be sufficient, while if it exceeds 0.5, the dilatancy properties of the zeolite suspension will decrease, but the viscosity of the smectite clay itself will increase, which is not preferable.

The following optional components can be added to the aqueous detergent slurry of the present invention as required.

Inorganic builders include (i) tripolyphosphate, (iii) pyrophosphate, (iii) orthophosphate, M-silicate, (
v) Carbonates or carbonates (usually alkali metal salts), etc. Other additives, (i) water-soluble I-based inorganic salts: sulfates, etc.
(ii} Anti-recontamination agents: CMC, PEG, PVA, etc.
iii Crab photobrightener,. Bleach: percarbonate, etc. M foam control agent, side antibacterial substance, WiD organic builder: citrate, malate tartrate, maleic acid polymer
, alkyl direct succinate, oxydiacetate, etc. (alkali metal salts), dyes, and fragrances, etc., but as already mentioned, low-phosphorus or phosphorus-free products are, of course, desirable. Example 1 Table 1 (1) Linear sodium alkylbenzene sulfonate (alkyl group carbon number CII to CI4) (2) Sodium o-olefin sulfonate (carbon number C,6 to C.8) (3) Boryoxyethylene Alkyl ether (alkyl group carbon number C
I2~CI5, EOP=10) ■ Average particle size 2.3 Synthetic zeolite, Silton DBX manufactured by Mizusawa Chemical Industry Co., Ltd.
(5) Kunipia F (6) manufactured by Kunimine Industries Co., Ltd. The slurry was kept at 70°C, heated for 5 minutes, and then measured using a B-type rotational viscometer 2
Measured at 0 rpm.

A detergent slurry having the composition (wt%) shown in Table 1 was prepared, and its clay content was measured.

The appropriate viscosity range for Akebono Drying Detergent Slurry is 40~
12 Poise, but does not contain smectite clay. 1 and ship. No. 6 has a high clay content and strong dilatancy properties, making it unsuitable as a slurry for mist drying. **Example 2 A liquid cleanser having the composition (wt%) shown in Table 2 was prepared, and the degree of static separation was measured.

To measure the degree of separation, the prepared sample was placed in a cylindrical glass tube.
After placing exactly 100 cc into a 0 cc measuring cylinder, sealing it, and leaving it under predetermined conditions, the transparent liquid phase separated into the upper layer was observed with the naked eye to determine the degree of separation. Table 2 (1): Sodium o-olefin sulfonate (carbon number C.2 to C,8) (2
): Average particle size 6.5〃Synthetic zeolite Mizusawa Chemical Industry (
Shilton DBK. (3: R.T.Vanderdi
IT Co. Manufactured by Begum F. As is clear from the results shown in Table 2, the liquid cleanser (No. 1) that does not contain smectite clay has a significantly higher degree of separation than the liquid cleanser 2 (M.2.3) that contains smectite clay. expensive.

Claims (1)

[Claims] 1 1 to 40 wt% surfactant, average particle size 0.5 to 1
An aqueous detergent slurry containing 1 to 40 wt% of 0μ zeolite and further containing smectite clay in an amount of 0.05 to 0.5 times the weight of the zeolite.