KR970007576B1 - Powdery cleaning agent - Google Patents

Abstract

The invention relates to a powdery cleaning agent for textile areas, especially textile floor coverings, containing a carrier material mixed with water, a detergent substance, where appropriate solvents and optionally further additives, and proposes, to achieve a powdery cleaning agent which saves raw materials and, at the same time, contains no or only small amounts of substances which are categorised as hazardous to health and incompatible with the environment, that the carrier material be formed by highly absorbent, swollen polymer particles, and organic fibre particles be attached to the surface thereof.

Description

Powder laundry detergent and its manufacturing method

FIELD OF THE INVENTION The present invention relates to a powdered laundry detergent for use on the surface of a fabric, in particular a surface of a floor covering fabric, and to a method for producing the powdered laundry detergent, the powdered detergent being a carrier material mixed with water, a laundry-active material, a solvent if necessary, and the like. Additives and the like.

Various forms of such laundry agents are already known.

References in the technical field include, for example, Federal Republic of Germany Patent No. 2732011.

In known laundry detergents, various organic and inorganic materials such as sawdust, crushed cork, diatomaceous earth and the like have already been proposed as carrier materials. However, only urea-formaldehyde foam and cellulose powder were possible when using such laundry agents at home. Their use is limited for a variety of reasons. It should be taken into account that formaldehyde foam can be harmful to human health. Detergents containing carrier materials with cellulose powder require the use of large amounts of natural cellulose bleached for years.

The production of cellulose powder produces very large amounts of wastewater and greatly pollutes the environment despite the introduction of new immersion methods for the recovery of cellulose. However, reducing the cellulose content in known powdered laundry detergents results in products that are difficult to "stick up" and take longer to dry, for example when used in carpets. In addition, these products can no longer be "poured."

Starting from the prior art described above, the object of the present invention is to provide the greatest possible effect upon washing, to save raw materials and at the same time to use very small amounts of substances that are not harmful to the human body or are not environmentally suitable. The present invention provides a powdery laundry detergent for fabric surfaces using only bays, and a method of manufacturing the same.

This object has been achieved by the invention described in claims 1 and 8.

The dependent claims contain further advantageous improvements.

According to the present invention, polymer particles which are highly absorbent in the dry state and are then swelled-so-called "strong absorbents" and organic fiber particles attached to the surface of the polymer particles are used as carrier materials.

Highly absorbent swollen polymer particles increase in volume and surface area at high proportions of moisture content.

As a result, the use of expensive raw materials, especially bleached cellulose, can be greatly reduced. Carrier or absorbent materials can be used for all carpet surfaces.

It tends to agglomerate and does not scatter on the carpet.

The organic fiber particles adhere to the surface of the swollen polymer particles.

Therefore, the distribution is good, only a small amount of organic fiber particles are needed.

Another important advantage is that it is possible to have very different compositions of laundry. For example, laundry agents can be easily replaced in "wet" or "dry" form, as described in detail below. Furthermore, the polymer particles may consist of polyacrylates. Known as such polyacrylates is the "Favor" (trade name) supplied by the Stockhausen Company of Krefeld. Particularly preferred are crosslinked polyacrylic acids which are present in part as sodium salts. The highly absorbent polymers described in "Allgemeiner Vliesstoff Report 4-1984, pp. 178-182" can also absorb aqueous liquids which are several times their own weight. The gel is formed in this way, the nature of which may be different. Such superabsorbent polymers release only a small amount of the aqueous solution they absorb, usually water, even under pressure.

According to the invention, the gel is preferably a particulate material (caviar structure). In this way, very small polymer particles of spherical structure are formed having a diameter of about 10 to 1,000 μm in the swollen state.

Thus, a very large surface area is obtained. The organic fibers may have a diameter of 5-30 μm and a length of 50-400 μm.

These are usually cellulose fibers.

In preparation, the process proceeds by treating the polymer of sodium polyacrylate (or polyacrylic acid) with water until saturated. As a result, the polyacrylate swells and develops into the above-described caviar structure. 1 g of polyacrylate can absorb up to several times its weight, for example up to 100 g of water. This polyacrylate does not release absorbed water even under pressure. It is possible to produce “wet” forms by adding more water to polyacrylates that no longer absorb water. It is then mixed with the swollen polyacrylate cellulose fibers to allow the fibers to adhere themselves to the polyacrylate particle surface.

The powder thus obtained is treated with a laundry-active substance, generally an aqueous surfactant solution. In addition, solvents and other additives, fragrances and the like can be added.

Such powdered laundry agents may contain 5 to 75% by weight, preferably 25 to 35% by weight of swollen acrylate.

It may also contain from 10 to 50% by weight of organic fibers, similar materials such as cellulose or cotton fibers and chemically or mechanically modified cellulose. Cellulose powder having a particle size distribution of 50-350 μm is used at 25-35% by weight. Other organic solvents such as 5 to 35% by weight, preferably 20 to 25% by weight of water, 0 to 20% by weight, preferably 5 to 15% by weight of methoxypropanol or non-aromatic benzine, and 0 to 7% by weight. % Of surfactant or mixture of surfactants. In particular, anionic, nonionic, cationic or amphoteric surfactants can be used preferably at 0.5 to 2% by weight. Finally, 0 to 5% by weight and preferably 0 to 2% by weight of commercial preservatives such as preservatives, antistatic agents and the like may be contained.

As examples, two forms are shown below:

Example I

Carrier: Volume (% by weight)

Cellulose 45.00

For example, Arbocel B 820 C

Arbocel fd 00

Arbocel TP 40

Technocel 90 DU 10%

Technocel 300 BL

Arbocel B 00 15%

LIC 200

Favor T (Swelled Acrylate) 5.00

(Equivalent to Favor 0.025% + water 4.975%)

Active-material solution:

Water 33.50

Surfactant 5.0

(For example, Rewopol V 2800) (corresponds to 1% of the laundry-active substance)

Release agent

(E.g. Baysilon AC 3099) 0.05

Antistatic

(For example, Statexan) 0.15

Balm 0.10

(Kobofleur)

Isopropanol 1.00

Preservative 0.20

(For example, Acticid SPX)

Solvent:

For example Ispopar J 10.00

100.00

Example II

Carrier material: amount (% by weight)

Cellulose 30.00

For example, Arbocel B 00 + 50% Arbocel

LiC 200

Arbocel fd 00 + 30% Arbocel

FiC 200

Arbocel B 820 C + 10% Arbocel

FiC 200

Favor CT (Swelled Acrylate) 30.00

(Equivalent to Favor 0.15% + water 29.85%

Active-material solution:

Water 23.60

Surfactant 5.00

(For example, Rewopol V 2800) (corresponds to 1% of the laundry-active substance)

Release agent

(E.g. Baysilon AC 3099) 0.05

Antistatic

(For example, Statexan) 0.05

Balm 0.10

(Kobofleur)

Isopropanol 1.00

Preservative 0.20

(For example, Acticid SPX)

Solvent:

For example Isopar J 10.00

100.00

The composition is prepared as follows for an amount of 150 kg (the values in parentheses are for Example I):

First, the acrylate dispersion of 0.23 kg (0.04 kg) Favor CT and 44.78 kg (7.46 kg) of water are stirred. Depending on the desired viscosity of the dispersion, it may be further diluted with water in the active substance solution.

33.43 kg (47.30 kg) of water; 7.50 kg (7.50 kg) of surfactant solution; 0.08 kg (0.08 kg) antifoam; 0.15 kg (0.23 kg) antistatic agent; 0.15 kg (0.15 kg) of balm; The active-material solution consisting of 1.50 kg (1.50 kg) isopropanol and 0.30 kg (0.30 kg) preservative is mixed in a separate tank.

46.97 kg (70.46 kg) of cellulose powder (4.2% moisture) is introduced into a flowshare mixer. While running the mixer, the acrylate dispersion is first dispersed with a diaphragm pump, followed by spraying the active-material solution and finally dispersing 15.0 kg (15.0 kg) of benzene.

In both cases, a dry, pourable white powder is produced.

By "laundry-active material" indicated above is meant a 5% aqueous surfactant mixture corresponding to the pure surfactant portion which constitutes 1% of this "laundry-active material". Isopropanol acts as a solvent for the substances added to the fragrance.

It is included in the surfactant mixture mentioned in the examples.

The features of the invention described in the specification and the claims are each important, and any preferred configuration for modifying the practice of the invention is possible.

Claims (14)

In powdered laundry detergents for use on the surface of fabrics, including transport materials, laundry-active materials, solvents and other additives mixed with water, the transport materials may be applied to the superabsorbent swollen polymer particles and the surfaces of the polymer particles. Powdered laundry detergent, characterized in that formed of adhered organic fiber particles. The powdered laundry detergent according to claim 1, wherein the polymer particles are made of polyacrylate. 3. The laundry powder of claim 2 wherein the polymer particles consist of crosslinked polyacrylic acid partially present as sodium salt. The powdery laundry detergent according to claim 1, wherein the polymer particles are ground to a diameter of 10 to 1000 µm in a swollen state. 5 to 75% by weight of the swollen polymer particles, 10 to 50% by weight of organic fibers, 5 to 40% by weight of water, 0 to 20% by weight of organic solvent, 0 to 3% by weight of anions A powdered laundry detergent comprising an acidic, nonionic, cationic or amphoteric surfactant or surfactant mixture, 0-5% by weight of other commercial auxiliaries and fragrances. The method of claim 1, wherein 25 to 35% by weight of the swollen polymer particles, 25 to 35% by weight of cellulose powder, 20 to 25% by weight of water, 5 to 15% by weight of non-aromatic benzine, 3 to 7% by weight A powdered laundry detergent comprising a surfactant mixture of 0 to 2% by weight. The powdery laundry detergent according to claim 1, wherein the organic fibers have a diameter of 5 to 30 µm and a length of 50 to 400 µm. A process for preparing a powdered laundry detergent for use on the surface of a fabric comprising a carrier material mixed with water, consisting of superabsorbent swollen polymer particles and organic fiber particles, wherein the superabsorbent polymer particles are treated with water until saturated. And mixing the formed gel with the organic fiber particles so that the fibers adhere to the surface of the polymer particles, and then mixing the obtained powder with the active substance. The method of claim 8, wherein the polymer particles are made of polyacrylate. 10. The method of claim 9, wherein the polymer particles consist of crosslinked polyacrylic acid partially present as sodium salt. The method of claim 8, wherein the polymer particles are ground to a diameter of 10 to 1000㎛ in the swollen state. 10 to 50% by weight of water, 0 to 20% by weight of organic solvent, 0 to 3% by weight of anionic , Nonionic, cationic or amphoteric surfactants or surfactant mixtures, 0 to 5% by weight of other commercial auxiliaries and fragrances. The method of claim 8, wherein 25 to 35% by weight of swollen polymer particles, 25 to 35% by weight of cellulose powder, 20 to 25% by weight of water, 5 to 15% by weight of non-aromatic benzine, 3 to 7% by weight A surfactant mixture of 0 to 2% by weight of the auxiliary, characterized in that it comprises a powder laundry detergent production method. 9. The method of claim 8, wherein the organic fibers have a diameter of 5 to 30 µm and a length of 50 to 400 µm.