DE102008007759A1 - Agent, useful for avoiding discoloration and graying during the washing of textiles, comprises a cationized substrate in the form of e.g. cationized cord thread sections and detergent-active and/or textile-maintaining ingredients - Google Patents

Abstract

Agent for avoiding discoloration and graying during the washing of textiles by a colorant-binding substrate based on cationized cellulose, comprises a cationized substrate in the form of cationized staple fibers and/or cationized cord thread sections as well as optionally detergent-active and/or textile-maintaining ingredients, where the staple fibers and/or the cord thread sections are made on basis of regenerated cellulose. Independent claims are included for: (1) a process for the production of a cationized substrate, comprising cationizing the cellulose staple fibers of regenerated cellulose optionally in mixture with cellulose, optionally pressing under addition of a binding agent to plates, drying the plates and punching to tablet shaped molded articles after the drying; and (2) a process for the production of the agent, comprising cationizing the staple fibers and/or cord thread sections of cellulose on basis of regenerated cellulose and optionally mixing with detergent-active and/or textile-maintaining ingredients.

Description

The The invention relates to a means for preventing discoloration and graying when washing textiles, which is a substrate Contains a substrate that comes from the wash baths free-flowing dyes and a method for Production of such substrates.

The Problem of the discoloration of textiles during washing, be it now in the household with the hand wash or in washing machines or in larger washing machines in commercial Company or industry, has long been known.

Caused discolouring textiles when washing textiles, that dyed textiles when washing dyes in the Wash water, washing bath or the wash liquor and then in the wash liquor freely available unbound dyes Depend on other textiles and not only in white undyed textiles to the dreaded discolorations but also shades of lighter-colored Textiles change, be it because of a delicate hue turns into a stronger colored hue or even the coloring is changed as such.

This Phenomenon that is not just the scare for everyone Housewife is but also when washing in commercial and industrial Scale is perceived as a major drawback occurs especially when dyed laundry is not colourfast is colored and the colors tend to bleed. But also it can not always be avoided with more valuable textiles that the dye separates from the dyed textile and vagabonded freely in the wash water.

Often trying to avoid this unpleasant phenomenon by that you sort the laundry by color and white wash washes for himself and if possible laundry washes separately with the same color. One such method is of course cumbersome, labor-intensive and many cases also not to perform. On the other hand, efforts have been made To develop means that are added to the laundry and which the To absorb vaginal dyes, before they on the to washing textiles can cause damage.

So will in the U.S. Patent 4,380,453 discloses an agent intended to function as a dye scavenger and which consists of a cellulosic substrate which has been catonized by treatment with a quaternary ammonium compound such as glycidyltrimethylammonium chloride or corresponding halohydroxy compounds and which is intended to remove the free vagrant dyes from the wash water. The substrate is added to the wash liquor and can be in various forms, for. As fabrics, nonwovens, braided ropes or balls etc.

From Disadvantage of this method is u. a. that it is often difficult these substrates after washing from the laundry too remove. In addition, lead such additives often to tangles or to entangle Laundry. It has also been found that z. B. the tissues specified there not particularly suitable for repeated use are.

That's why there have been quite a few advancements. So be in the DE 69 710 724 T2 Methods are described, with which an improved substrate is to be obtained. The process described therein consists of a whole series of process steps such as ammonification of the cellulose substrate, treatment thereof under a pressure of 0.6 to 1.37 MPa, heating the substrate to a temperature between 30 ° C and 40 ° C, wrapping the substrate in a water-impermeable material and rotating the material at temperatures between 15 and 100 ° C for a period of between 1 and 12 hours, removing the enclosure, passing the substrate through an acid bath, further pressure treatment and drying of the substrate.

These Procedural steps are very labor intensive and lead ultimately not a significant improvement.

In the American patent applications US 2002/0119721 A1 and US 2006/0019564 A1 Further substrates for the removal of dyes from the wash liquor are described, which consist of two or more layers and are added to the laundry. In this case, the dye-absorbing compounds may be applied to individual surfaces of the layers or on multiple surfaces. But even these embodiments do not bring any significant reductions in the disadvantages described above.

Another attempt to remove the free flowing dyes in the wash bath is in the WO 99/63142 described. It is primarily the goal of the development described there to reduce the entanglement of the substrates with the laundry. In this case, the means described there have floating bodies or additionally also edge reinforcements. For example, the dye-receiving bodies may be in the form of a continuous ring which is placed on the stirrer, or they may be treated with floating balls or they may be in the form of a hollow ball guided, which has some larger openings for the free passage of wash liquor and is attached via a rope and a clamp on the washing machine.

apart that the procedures described there are cumbersome, complicated and expensive, these devices can be used only one or a few times and then have to be discarded.

Even though Already numerous means are known to be free-roaming To absorb dyes during the washing process and There is still a need for improved Agents that are suitable for the free vasabelling dye during to remove the washing process and prevent it during the washing a discoloration of laundry takes place.

task It is an object of the invention to provide a means of which does not have the aforementioned disadvantages, that simple and their production is not so labor intensive As with many of the known remedies, it is easy to use is that can be reused as often as you like, that Do not become entangled during the washing process and felting leads and after washing easily can be separated from the washed laundry and at its production is also on inexpensive, cheap starting materials namely back to waste and minority varieties which can be used in the manufacture of textile products like Fibers, filaments, yarns, fabrics and the like, and incidentally without difficulty in the household at hand washing and in washing machines, in commercial laundries and industrial scale can be used.

These The object is achieved by a means for preventing Discolouration when washing textiles with a dye binding substrate, which is characterized in that the agent a container, one for opening and closing serving closure, the container is a cationized Substrate contains and the container passages for the passage of the washing liquid.

Preferably the passages have a diameter of 0.01 to 1 mm up. Incidentally, the diameter can be applied to the substrate be matched.

Of the Closure is preferably a zipper, a velcro, a zipper or snap closure. It is also possible, in particular in flexible containers such as sachets, bags and the like from woven, knitted, braided, etc., sealing to effect by simple attachment, z. B. with a string, a rope Etc.

It is advantageous if the container is a bag-shaped or bag-shaped. It is advantageous if the container maximum of half preferably maximum filled with substrate up to a quarter of its fill volume is.

The Substrate is preferably based on a polymer which by cationization of a hydroxyl-containing polymer has been obtained.

In a particularly advantageous embodiment of the invention the substrate is in tablet form.

Preferably is the cationized polymer cationized cellulose.

The Substrate can be constructed on the basis of staple fibers or Cordabschnitten be. The Cordabschnitte preferably have a length from 1 to 5 inches up.

It is advantageous if the substrate next to the cationized polymer 0.2 to 2 wt .-% of a binder. The binder can z. As carboxymethylcellulose, starch or the like be.

The Substrate may also be advantageous from a mixture of cationized Pulp and cationized cellulose fibers in particular also constructed staple fibers be.

The Substrate may be based on native cellulose or regenerated Cellulose be constructed. In a particularly advantageous embodiment The invention is the substrate based on fiber waste and Minor types built, but also waste, complaint parts of textile surface products.

The Substrate may also be cotton fibers, even when mixed with cellulose fibers, d. H. Comprising regenerated cellulose fibers. Under fibers out Regenerated cellulose are in particular fibers to understand the be prepared in a known manner by the viscose process. But there are also suitable fibers, after the Cupraminprozess getting produced.

Another object of the invention is a process for the preparation of a cationized substrate, which is characterized in that cellulase staple fibers optionally in a mixture with pulp, washed with water and optionally under Addition of a binder pressed into plates, the plates are dried and punched out after drying to tablet-shaped moldings.

In Variation of this method is the mushy cationic mixture of cellulose staple fibers, pulp and optionally binder on a Punched sheet metal painted, in which the holes are a round or have angular shape. The mushy mixture is still in the perforated Sheet metal dehydrated and dried and the sheet metal moldings taken in tablet form.

The In general, the invention can be expressed as follows Be performed manner.

It First, a body made of cellulosic Material or other suitable polymer having hydroxyl groups exists, cationized.

The cationization of such substrates is known per se. It is in this context in particular on the US Pat. No. 4,380,453 , US application 2,020,119,721 A1 and US 2006 0019564 A1 , the WO 9/63 142 referenced, to which numerous examples for the cationization of corresponding substrates are described. The relevant disclosure in these documents is hereby incorporated by reference.

Within the scope of the invention, the substrates may be present, inter alia, in the following form:
As textile fabrics such as fabrics, cloths, knitted fabrics, as nonwovens, as sections of cords, as staple fibers, as pulp, which is preferably obtained from linters, in the form of granules, as cubes, as spheres but especially in the form of tablets.

These cationized moldings are then placed in the open Container is given, which then closed by means of the closure becomes. The container can z. B. from tissues or Knitted fabricated and are with a corresponding closure provided, or can be easily tied up.

The Size and volume of containers can be varied within wide limits and on the local washing conditions be adjusted. Such are containers that are the size a washcloth or a handkerchief have very suitable since they are like a piece of laundry during the washing process behavior, but not structurally linked tend.

It is generally sufficient that the container to a quarter filled up to half with the cationized substrate is.

Consists the substrate being filled into the container is said to be made from blends of cellulosic staple fibers and pulp and possibly a binder, so the container should maximum up to 50% of its capacity, preferably only a quarter of its capacity with the substrate be filled as the substrate during washing swells and expands. As a result, the substrate reaches a especially large active surface.

The Containers preferably have openings with a Diameter between 0.01 to 1 mm. This opening size can be achieved very easily, for. B. when the container for example, consists of a fabric material, by adjusting the warp and weft density. Accordingly, one can be knitted at Fabrics adjust the stitch density accordingly, that these values be reached for the openings.

at These openings, the wash water is still very good flow the container and contact the substrate come. On the other hand, the substrate is prevented from coming out of the container and to pollute the laundry.

To the washing process, the container can be without Separate difficulties from the laundry, as it is very recognizable and not get tangled up in the laundry.

ever according to the intensity of the vagrancy in the wash bath Dye molecules, the container with a Filling be used several times.

Otherwise It is extremely easy to open the container and withdraw the spent substrate from the container or by everting the container can empty then refilled immediately.

Especially the invention is advantageous in that so-called minor varieties of threads and fibers, but also of textile surface products can be used.

such Minor varieties always fall in the production of fibers and threads, Yarns and cords and also in the manufacture of textile surface products at.

less places of staple fibers can be used directly or possibly be subjected again to a crushing process. Threads and Yarns can be cut or torn, cord yarns and other twisted yarns are appropriate on shorter length to cut, preferably to lengths from about 0.5 to 5 cm.

There used according to the invention cheap waste can be, the invention has a large Cost and price advantage over the known methods or funds on. The containers are very easy to make and do not require additional reinforcements. For the substrates can also textile waste products be used in the form of textile fabrics. These only need an appropriate size be cut to fit in the respective container in fit.

The Containers can be used as often as you like.

One further advantage of the agent according to the invention is that the active substrates are not directly immediate Have contact with the laundry and thus there is no danger that by a direct close contact also interactions with occur to be washed good. So is a direct immediate Dye transfer, be it from the good to be washed on the Substrate or vice versa, avoided. The means according to Invention thus absorbs only the dye molecules, which in Free the wash liquor.

The Invention is explained in more detail by the following example.

example

In a beaker is 50 g of pulp and 50 g to 1.5 cm short cut viscose fibers with a freshly prepared cationization solution. The cationizing solution was prepared from 27.55 g 33% sodium hydroxide solution, 190.85 g of water and 31.60 g of a 65% strength Solution of 3-chloro-2-hydroxypropyltrimethylammonium chloride. The mixture of pulp, viscose fibers and cationizing solution is then kneaded vigorously for a few minutes and then sealed in a jar and at room temperature Left for 24 hours. After that, 4 times with 2.5 liters Washed water. After drying, 100 g of a 1% Carboxymethylcellulose solution (CMC solution) and another 100 g of water was added.

The mashy, dripping wet mass will now be in a rectangular mold given and evenly distributed. Subsequently In a hand press, the mass is reduced to a layer thickness of approx. 1 cm, the water content is then still about 50%. After drying, the plate becomes tablets of a diameter punched out of 3.5 cm. This tablet-like shaped body weigh about 3g and can be used immediately.

The inventive agent takes from a wash liquor the free-flowing dye is very good and is in many Superior to the commercially available color and mud flap cloths.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 4380453 [0006, 0031]
• - DE 69710724 T2 [0008]
• - US 2002/0119721 A1 [0010]
• US 2006/0019564 A1 [0010]
• WO 99/63142 [0011]
• US 20060019564 A1 [0031]
• WO 9/63142 [0031]

Claims (17)

Means for preventing discoloration and graying during washing of textiles by means of a dye-binding substrate, characterized in that the means comprises a reusable container having an opening for opening and closing, the container containing a cationized substrate and the container passages for has the passage of washing liquid. Means according to claim 1, characterized in that the passages have a diameter of 0.01-1 mm exhibit. Agent according to claim 1 or 2, characterized that the closure has a zipper, a Velcro closure, a snap fastener or zipper is tied or the container is. Agent according to at least one of claims 1-3, characterized in that the container is a bag-shaped or bag-shaped. Means according to at least one of claims 1-4, characterized in that the container is a maximum of half preferably at most up to a quarter of its fill volume filled with substrate. Means according to at least one of claims 1-5, characterized in that the substrate is based on a polymer is constructed by cationization of a hydroxyl group Polymers has been obtained. Means according to at least one of claims 1-6, characterized in that the substrate has tablet form. Substrate according to Claim 6 or 7, characterized that the cationized polymer is cationized cellulose. Means according to at least one of claims 1-8, characterized in that the substrate is staple fibers or cord sections includes. Agent according to claim 9, characterized that the Cordabschnitte a length of 0.5-5 cm exhibit. Means according to at least one of claims 1-10, characterized in that the substrate is 0.5-2% by weight containing a binder. Means according to at least one of claims 1-11, characterized in that the substrate is made of a mixture of cationized pulp and cationized cellulose fibers is. Means according to at least one of claims 1-12, characterized in that the substrate is based on native Cellulose or regenerated cellulose is constructed. Agent according to one of claims 9-13, characterized in that the substrate of fiber waste and minority varieties. Means according to at least one of claims 1-14, characterized in that the substrate is based on cotton fibers or composed of a mixture of cellulose fibers and cotton fibers. Method for producing a cationized substrate, characterized in that cellulose staple fibers, optionally in Cationized with pulp, washed with water and optionally with the addition of a binder pressed into plates, the Plates dried and tablet-shaped after drying Punched out moldings. Method for producing a cationized substrate, characterized in that cellulose staple fibers, optionally in Cationized with pulp, washed with water and optionally with the addition of a binder as a slurry on a perforated Sheet metal sweeps, in which the holes have a round or angular shape have, the mushy mixture still drained in the perforated plate and dries and the sheet, the tablets in tablet form extracts.