WO2015044293A1

WO2015044293A1 - Compositions for multifunctional coating films which can be applied in liquid form

Info

Publication number: WO2015044293A1
Application number: PCT/EP2014/070532
Authority: WO
Inventors: Jens Schaller; Knut Stengel; Frank Meister; Michael SCHÖBITZ; Sabine Riede
Original assignee: Thueringisches Institut Fuer Textil- Und Kunststoff-Forschung E.V.
Priority date: 2013-09-27
Filing date: 2014-09-25
Publication date: 2015-04-02
Also published as: DE102014113904A1

Abstract

The invention relates to a formulation for coating films which can be applied in liquid form, comprising an aqueous solution of water-soluble polysaccharides or polysaccharide derivatives, crosslinkers with at least one carbonyl function and optionally diols or polyols. The polysaccharides or the derivatives thereof are cellulose ether, starch, or starch derivatives in particular. The polyols are preferably mono-, di-, or triethylene glycole, glycerin, sorbitol, gallic acid, fructose, sucrose, or tannic acid. The crosslinkers are preferably aldehydes or ketones with a molecular weight of less than 300 g/mol, in particular glyoxal, glyoxylic acid, vanillin, acetone, or acetylaceton. The solution is not completely crosslinked at the dispensing time and is still reactive. The coating films are used in particular for compressing, sealing, or covering and conserving surfaces. Water-insoluble additives (foreign substances), such as ground used paper or wood meal, and/or additives or active ingredients are introduced during the production of the formulation.

Description

Compositions for liquid applicable multifunctional coating films

Besehreibung

The invention relates to the preparation of film-forming water-soluble formulations based on polysaccharides and their use for sealing and sealing, for covering and for the preservation of surfaces, for improving the flame resistance, the mechanical properties and for improving the fungicidal and herbicidal properties of the surfaces, which harden after application under ambient conditions and become water insoluble. Background of the invention

Liquid applicable, film-forming formulations are already used as a surface coating in wood preservation, as sealing and sealing and covering surfaces and as a moisture, steam and heat barrier in construction, agriculture and forestry. The disadvantage of the currently used films on polyolefin, PET, PA and PVC base when covering or covering, especially in complex surface geometries or special structural structures (silo covers, Ernteverfrühungsfolien, etc.) is the high manual effort in the attachment ,

One way around this effort is the application of a liquid formulation, which then hardens.

The published patent application DE 10 2009 049 284 describes a film which can be applied at least in some areas by spraying or brushing as a functional layer of a building envelope and a vapor barrier for wooden constructions. In this case KunstStoffdispersionen be used on the basis of synthetic polymers, preferably acrylate / methacrylate or polyurethane. Also mentioned as usable plastic cellulose, but lacks any teaching formulations for films based on cellulose in the sense of, at least partially, by applying spray or brush applied film sections and their possible embodiments.

The film formation from the applied dispersion layer is preferably based on a physical ^¬ mechanical bonding of the plastic particles during evaporation of the solvent / dispersant. Therefore, the mechanical properties are limited and adjustable only within very narrow limits. For the realization of the spray and film properties also various additives, such as defoamers and thickeners, are mandatory. Biodegradability is not adjustable. There are no functional activities, for example against fungi and plants. Patent DE 695 23 127 T2 introduces the invention of a crosslinkable cellulose additive for use in latex paints. Components of the additive are cellulose ethers substituted with a hydrophilic alkene grouping. In this case, crosslinking is only possible via biradical oxygen, initiated by catalysts. This additive serves exclusively as a thickening and rheology modifying agent; It promotes the networking of latex paints.

Latex compositions containing such cellulose ether additives serve to detach oil-based compositions and hence high VOC paint release. The content of cellulose ether additive in the latex matrix is 0.05 to 3.00% by weight. Latex polymers consist of different, generally synthetic macromolecules, mostly based on acrylates and are commercially available. The crosslinkable additives are prepared in the patent by reacting mono- to polyunsaturated, aromatic and aliphatic glycidyl ether derivatives with cellulose ethers. The crosslinking reaction occurs here catalytically with MnS0 ₄ or with C0CI ₂ by addition reaction of a cyclic ether.

Patent DE 103 08 236 describes biodegradable agricultural liquid films based on polyhydroxy polyethers. These are consumed at considerable expense and using toxic chemicals, e.g. Formic acid, hydrogen peroxide, phosphoric and sulfuric acid, produced by acid-catalytic chemical reactions at temperatures of 80-120 ° C, which affects the cost-benefit ratio. After spraying the water / acetone solution or suspension, the film formation itself, in turn, occurs only by purely mechanical means by bonding the soil particles. The field of application is therefore limited to the soil application, there is no film with its own stability, which no further applications are possible. This is offset by the not sufficiently controllable biodegradability. In addition, the application is carried out by spraying water / acetone mixtures, which is unacceptable, for example, for indoor use.

DE 10 2005 053 587 describes the production of temporarily degradable films for agriculture on the basis of an alkali metal silicate solution or dispersion, to which biodegradable, native oligopolyols are admixed. The spray solution is produced in several steps and is extremely expensive from a chemical-technological point of view (temperatures up to 200 ° C, use 50 % potassium hydroxide solution, filtration processes). Despite the use of plasticizing components, the mechanical properties are only limitedly adjustable. Silicates naturally produce brittle and hard moldings. Finally, US Pat. No. 2,329,741 describes the production of films from hydroxyalkylcelluloses

Crosslinking reactions with bifunctional aldehydes. There will be no main cellulosic component, e.g. Pulp, recycled cellulose or wood flour used. Only cellulose derivatives are crosslinked, resulting in a completely different crosslinking structure, which can not cover a wide range of applications. In addition, the cost of using only heteroglycanic polysaccharide derivatives is significantly higher, especially for gellans and xanthans. The crosslinking takes place at a temperature of 105 ° C, which makes practical wet processing almost impossible. The subject of WO 2008/112419 A2 is a storage-stable aqueous latex paint which contains titanium oxide, vinyl-acrylic, acrylic latex and PVC. Crosslinking by acetal or ketal formation does not occur in this system. Neither are spacer compounds mentioned in the aforementioned patent, which are chemically bound in spray films and in turn already have biological and fire-retardant properties and also influence the physical properties of the coating, depending on the type of polyol. Also, no chemical cross-linking with the surface to be coated by the latex paint should take place; if so, then in a much different way than acetalization or ketalization.

Cellulose derivatives are only minor components of this coating. The object of the invention is the preparation of a water-soluble, water-dilutable, storage-stable, sprayable, film-forming polysaccharide-based formulation with adjustable biodegradability, fire retardation, biocidal effect,

Swellability and mechanical stability, which adheres to wood, paper, glass, concrete, clay, lime and natural soil, such as soil and sand, and becomes insoluble in water after application. All the aforementioned properties are preserved and should be individually adaptable to the given problem by varying the basic components contained in the formulation. Another essential task is that the curing of the

Composition / formulation is carried out at ambient temperatures and without additional heating.

The object is achieved by a product with the characterizing features of the first claim. This includes a formulation consisting of a water-soluble polysaccharide / derivative dissolved in a solvent, wherein the degree of substitution of the derivative is less than 3, and a carbonyl-based crosslinker. As an additional component, a polyolic compound can be added, which brings additional functionalities with. The composition always includes a portion of water. Advantageous variants and the use of the sprayable formulations are shown in the subclaims and examples.

According to the invention, a sprayable formulation is prepared. The inventively produced

Formulations after application and air drying have the properties formulated in the task, needed to solve the problem. The adjustment of the properties, such as degradability, swellability, fungicity, herbicity, mechanical properties and / or flammability is effected by varying the type and amounts of polysaccharide, crosslinker and solvent and can be further optimized by the addition of additional polyols, filler or additives.

The product described in detail according to the invention requires the use of water-soluble polysaccharides or polysaccharide derivatives which can be reacted with the crosslinking agents. The polysaccharides or polysaccharide derivatives have a molecular weight of 40,000 g / mol or more. As a result of the crosslinking of the hydroxyl groups, the polysaccharides or polysaccharide derivatives lose their water solubility. By crosslinking with additional polyols and optionally contained fillers or by the choice of the constituents of the composition (polysaccharide / derivative, crosslinker, optionally polyol / diol), the properties given in the task are obtained.

For the solution of the problem advantageous water-soluble polysaccharides and polysaccharide derivatives are, for example, starch, dextran, alginates, hydroxyethyl starch, hydroxyethyl cellulose (HEC),

Methylcellulose (MC), carboxymethylcellulose (CMC), hydroxypropylcellulose (HPC), chitosan and aminocellulose or mixtures thereof.

Preferably, the polysaccharide is hydroxyethyl cellulose and / or carboxymethyl cellulose.

To expand the functionality, it is favorable to provide further OH groups by the addition of di- or polyols or to use alcohols, di- or polyols as solvent. The molecular weight of the di- or polyols is max. 300 g / mol. Also Hydroxyl-functionalized polymers may be added, but are not polysaccharides or polysaccharide derivatives having a molecular weight of 40,000 g / mole or more.

The added polyols include aliphatic and aromatic polyols having a max. Molecular weight of 300 g / mol. Preference is given to natural polyols. Particularly suitable are ethylene glycol, propanetriol, triethylene glycol, polyethylene glycol, sorbitol, glucose, fructose and galactose, corilagin, digallic acid, tannic acid and gallic acid. Examples of hydroxyl-functionalized polymers are polyvinyl alcohol, natural polysaccharides and derivatives.

The solvent is preferably water. Also particularly suitable are alcohols, diols or polyols or their aqueous solutions. Also, aqueous solutions of other organic solvents, e.g. Acetone are suitable.

In addition, a water-insoluble filler (foreign matter) may be added. This comprises water-insoluble recycled cellulose, for example ground waste paper, cellulose fibers or wood flour, which are incorporated by existing hydroxyl groups into the network formed by crosslinking. Also, modifiers that do not interfere with crosslinking but affect the physico-mechanical properties of the coatings made from the composition can be used as a filler, eg, urea. Other fillers may include color pigments, UV stabilizers, fire retardant additives, electrically conductive substances (carbon black, metals, carbon fibers, carbon nanotubes). In addition or in addition, additives / active ingredients may be added, such as UV stabilizers, fire retardant additives, kaolin, talc, cosmetic agents, antimicrobial substances and medically active substances that are not covalently incorporated into the network, but are firmly anchored in the matrix and nevertheless accessible. Fillers can also be incorporated after application of the formulation, this is the case with sand, concrete, gravel and soil, especially in arable soils. The finished formulations are water-soluble. Suitable crosslinkers have one or more carbonyl and / or carbaldehyde functions. These are generally low molecular weight crosslinkers, ie those having a molecular weight of less than 300 g / mol, preferably less than 250 g / mol. They are preferably water-soluble aldehydes and ketones. Particularly preferred aldehyde components are glyoxal, pyruvaldehyde, glyoxylic acid, vanillin, salicylaldehyde,

Urea / glyoxal and urea / formaldehyde condensates and glutaraldehyde application. Particularly suitable ketone components are acetone and acetylacetone. By selecting the crosslinker and the degree of crosslinking after the application, the adhesion to the surface to be coated and the degradability can be adjusted. Because water or aqueous solutions and / or aqueous solutions of the crosslinkers are used as solvents, a proportion of water is always present in the composition.

The application of the still liquid or pasty formulations can be carried out by all techniques known to those skilled in the art, such as brushing, spraying, spraying, trowelling, dipping or the like.

The preparation of the formulation is carried out in a one-pot synthesis. The pre-crosslinking of the formulations is achieved by heating the mixture to 20 to 60 ° C, while preventing the evaporation of the water contained. In principle, form, under Acid catalysis, hemiacetal and acetal bonds between the water-soluble polysaccharides / derivatives and the optional polyols and cellulose-based fillers, if included, whereby water is split off. Since this is an equilibrium process, it will not be fully implemented as long as excess water remains in the system.

The basic composition consists of a solution of a water-soluble polysaccharide or polysaccharide derivative in the concentration range of 1 to 20% by weight, preferably 8 to 12% by weight, and a cabonyl group-containing crosslinker selected from the group of aldehydes and ketones, preferably glyoxal, pyruvaldehyde, salicylaldehyde, Glutaraldehyde, acetone and acetylacetone, in molar ratio of polysaccharide in solution to crosslinker from 1: 0.1 to 1: 3, preferably 1: 0.8 to 1: 1.2. In this case, water is always present in the composition either by the solvent and / or the aqueous solution of the crosslinker. By treating this mixture over a period of 1 to 5 hours, preferably 2 to 3 hours, at 20 to 60 ° C, preferably 25 to 35 ° C, to obtain a water-soluble, liquid formulation. Subsequently, one or more aliphatic or aromatic polyols which at the same time as spacers, plasticizers and carriers more special

Functionalities, such as, but not limited to, herbicity, fungicity and fire retardancy, in molar ratio of polysaccharide in solution to polyol of 1: 0.1 to 1: 3, preferably 1: 0.8 to 1: 1.2 added. After 0.1 to 2 hours, preferably 0.5 to 1 hour, at 20 to 60 ° C, preferably 25 to 35 ° C, 0.01 to 0.05 mol, based on the polysaccharide, glacial acetic acid are added and the The solution is stirred until the viscosity increases. This treatment results in the formation of acetals and hemiacetals, or of ketals and hemiketals, between the crosslinker and the polysaccharide and the polyol within the solution. This reaction remains incomplete under the given reaction conditions and the complete crosslinking occurs only with further dehydration. The formulations thus obtained are storage stable.

A water-insoluble filler may be added either together with the polyol component or incorporated after application during cure. The filler content is in the range of up to 70% by weight, based on the total weight of the composition.

The application of the liquid formulation thus prepared may, after optional further dilution with water, be carried out by all methods known to the person skilled in the art, such as, for example, filling, brushing, spraying. Depending on the environmental parameters, such as humidity, temperature, wind, rain, solar irradiation, the formulation is cured within 0.1 to 5 hours and cured. Additional heating is not necessary for curing, temperatures above 10 ° C are sufficient. Preferably, the curing takes place at a temperature of 10 to 50 ° C.

Depending on the nature and proportion of the polyol, the coating films after curing have a total elongation of 20% or more, determined according to DIN EN ISO 52713 on Instron universal testing machine 4466, according to DIN EN ISO 7500/1.

The coating films thus obtained are swellable and stable or degraded within a period of 1-100 days, depending on the ratio chosen Polysaccharide / crosslinker / polyol / filler. The reason for the different degradation behavior is due to the different degrees of cross-linking in different compositions.

In order for the final composition to be still reactive, the proportion of solvent in the composition should be at least 50% by weight and water must still be present in the composition.

The reactivity of the composition is controlled by the degree of pre-crosslinking. The reactivity is higher when the crosslinkers are used in the molar ratio of 1: 1 to 1: 2 to the water-soluble polysaccharide, then after the application of the composition, the crosslinking is faster and it can also be crosslinked free OH groups of the coated surface, thereby one achieves a firmer bond to the surface.

The properties set in the task can be adjusted specifically by combining the recipe disclosed above. To obtain a fire-retardant film, the polyol component selected is a polyol from the group of aromatic polyols, preferably tannic acid or gallic acid, in a molar ratio to the polysaccharide / derivative used of 1: 0.1 to 1: 2, preferably 1: 0.25 to 1: 1, and after curing, obtains films rated to the automotive industry standard TL 1010 by SENBR (sample expires within 8.9 cm after the start mark) to DNI (does not burn).

In order to obtain a film having biocidal properties, the polyol component selected is a polyol from the group of aromatic polyols, preferably tannic acid or gallic acid, in a molar ratio to the polysaccharide / derivative used of 1: 0.1 to 1: 2, preferably 1: 0 , 25 to 1: 1, and receives after curing herbicidal films on which a repopulation after 30-90 Days, which are simultaneously fungicidal to highly fungicidal.

The biodegradability of the films can be adjusted by the amount of crosslinking agent. The crosslinker is selected from the group of carbonyl compounds, in particular the aldehydes and ketones, in particular glyoxal, glyoxylic acid, pyruvaldehyde (pyruvic acid aldehyde) and acetone. By adding the crosslinker in a molar ratio to the polysaccharide / derivative of 0.1: 1 to 3: 1, the degree of crosslinking and thus the duration to complete degradation in nature can be controlled. The degradability can be adjusted to a range of 1-100 days, or a degradability can also be prevented and permanently stable films are obtained. The amount of crosslinker needed for a given period of degradation depends on the polyol used, the polysaccharide / derivative and the additives.

The swellability of the films depends on the polyol used. In particular, aliphatic polyols can be used to adjust the swellability. These are in particular glycerol, ethylene glycol,

Triethylene glycol and polyethylene glycol. By adding said polyols in the molar ratio of 0.1: 1-2: 1 based on the polysaccharide / derivative used in the above-mentioned formulation, films are obtained which have swelling capacities of 50 to 90% with respect to the dry mass.

In addition to the properties described above, the mechanical stability of the films may be affected by the addition of cellulosic fillers such as ground waste paper, cellulosic fibers or wood flour, and the proportion of polyol. By adding additives in the ratio of 1: 0.1 to 1: 1 in

With respect to the mass of polysaccharide / derivative used and / or variation of the polyols used, in Specific aliphatic polyols, such as glycerol, ethylene glycol, diethylene glycol, triethylene glycol and polyethylene glycol, in a molar ratio of 0.1: 1 to 3: 1 based on the polysaccharide / derivative used, the stretchability of the films can be adjusted in the range of 10 to 80% become.

Adding isovaleric acid or phenethylamine as a wild-tanning agent to the composition will not hinder cross-linking and textiles may be soaked in this composition. The textiles obtained in this way can be attached to the terminal drive of trees and prevent by constant release of Vergrämungsmittels the feeding by wild animals.

If added to the composition PEG to increase the elasticity, this is suitable

Composition excellent for agricultural purposes. When applied to soil, the solution penetrates several centimeters deep and cross-linked, including the earth particles depending on the

Weather conditions in 5 to 48 h. Moisture is stored in the swellable upper soil layer penetrated by the composition. Addition of a 10% PVA solution increases the flexibility of a film layer made from this composition, and this film layer could be used as a geotextile to prevent soil erosion. All formulations in the above

Compositions is common to them before the

Application aqueous solutions, or when using

Additives Suspensions are those which are liquid and which cure only after application, depending on the environmental parameters. This will be permanent or temporarily water-insoluble coatings obtained. All formulations adhere to wood, paper, concrete, clay, lime, as well as to natural soil, such as soil and sand. By their application in the liquid or pasty state, they are able to penetrate into cracks and bumps and to close / bridge them.

The following examples are intended to illustrate the invention. Percentages are to be understood as weight percentages unless stated otherwise or immediately apparent from the context.

Examples

Example 1 :

For the synthesis of the liquid applicable

Coating films, a 1 to 15%, preferably 9 to 10% aqueous solution of hydroxyethyl cellulose in water was prepared, mixed with 50 to 100 g, preferably 60 to 70 g, recycled cellulose and mixed with conc. Acetic acid to a pH of 2 to 6, preferably 4 to 5 acidified and with 0.05 to 0.5 mol, preferably 0.1 to 0.3 mol of glyoxal, based on a 40% solution, added, 10 min stirred at a temperature of 20 to 50 ° C, preferably 20 to 30 ° C and then 0.1 to 0.5 mol, preferably 0.2 to 0.4 mol of tannic acid added and 3 hours at 20 to 50 ° C, preferably 30 to 40 ° C stirred. By varying the amount of glyoxal, the herbicidal action could be tailored. The tannic acid improved the fire properties of the film.

Comment : + Repopulation with organisms after ca.10

meet

+ + Repopulation with organisms after approx. 30

meet

+ + + Repopulation with organisms after approx. 90

meet

Determined according to EN13432 Example 2:

The composition corresponds to Example 1, wherein the polyol components were tannic acid (0.2 mol) and glycerol. For crosslinking, 3 moles of glyoxal (40%) were added. By varying the amount of glycerol, the viscosity of the solution could be adjusted specifically

Determined according to DIN EN ISO 2431.2011

Example 3:

The composition corresponds to Example 1, wherein the polyol components were tannic acid and glycerol (0.3 mol). For crosslinking, 3 moles of glyoxal (40%) were added. By varying the amount of tannic acid, the fungicidal action and the fire retardation could be specifically adjusted. This formulation can be used as a protective coating for wood.

DNI sample does not burn

SE sample goes out before the start mark is reached SENBR sample expires within 8.9 inches after the

start marker

SEB sample expires between 8.9 inches from the

Start mark and the end of the sample

B sample burns off completely

+ weakly fungicidal

++ fungicidal

+++ strong fungicidal example 4:

The composition corresponds to Example 1, wherein the polyol components were tannic acid and glycerol (0.3 mol). For crosslinking glyoxal (40%) was added. By varying the amount of glyoxal, the residence time in the soil could be specifically adjusted.

Degradation of glyoxalvernet zter Hydroxyethylcellulose in the soil

*) Visual observation, onset of cracking

Example 5:

120 g of 2-hydroxyethyl cellulose were taken up in 1.4 liters of water and then pre-swollen with stirring at room temperature, then dissolved at 40 ° C and stirred for an hour after addition of 70 ml of a 50% aqueous Glyoxylsäurelösung at 50 ° C. Thereafter, 7 g of polyvinyl alcohol was added. After 2 hours of stirring at 50 ° C, a clear solution was formed. The The solution obtained had a zero shear viscosity of 1600 mPa s at 20 ° C, showed slightly pseudoplastic behavior and had a FestStoffgehalt of 10.73%. This solution adhered very well to a textile fabric. The crosslinking took place by drying the fabric at 60.degree. The use of PVA gives the crosslinked textile coating the required flexibility. The textiles obtained in this way have an increased water retention capacity.

Example 6:

6 g of methyl cellulose (DS = 1.2) were stirred in 94 g of water at a temperature of 90 ° C. The solution was cooled with stirring to room temperature and then stored overnight in the refrigerator at 6 ° C, so that a clear, viscous solution was formed. To this solution was added 4.8 g of 50% glyoxylic acid. With a Turrax glyoxylic acid was mixed with the Methylcelluloselosung, thereby forming a creamy, solid, frothy mass. The complete crosslinking took place during the air drying. The resulting foam is flexible and able to take up to 3000% of its own mass of water without dissolving it. The foam can then be dried again and has the same properties as before the water absorption.

Example 7:

20 g of PEG 200 were heated with stirring to 50 ° C within one hour. During this time, 29.6 g were 50%

Glyoxylic acid added dropwise. The pH of the solution was initially 3 and increased to 4.5 to at the end of the reaction

5 on. The result was an opaque, viscous solution (LI).

30 g of 2-hydroxyethyl cellulose were taken up in 0.7 liter of water and stirred for 1 hour at room temperature solved. To this solution was added 10 ml of the freshly prepared solution (LI), stirred for one more hour at room temperature and the reaction temperature raised to 50 ° C for an additional hour. To this solution, 2.4 g of urea were added while maintaining the temperature and then stirred for an hour. The result was a pale yellow, very viscous solution.

The addition of urea surprisingly caused a higher ductility and a lower brittleness of the resulting film. It was possible to cover uneven surfaces with it. Therefore, this solution can be used as a biodegradable silage film. So far, the surface of silos has been covered with plastic film, which has to be elaborately designed, repulsed when it is removed from feed, and finally disposed of. Spraying the upper (uneven) green slice layer of a silo with the solution described causes the airtight seal and thus allows the anaerobic fermentation. The foil does not have to be removed, it is torn when removing food and can be eaten by livestock.

Example 8:

10 g HEC were dispersed in 30 g PEG 200 dispersed at 60 ° C and then brought in a kneader in a clear, opalescent form. While maintaining the temperature, 2 ml of 50% glyoxylic acid were added to this solution and the mixture was kneaded until a clear, beige-colored, resinous substance was obtained which can be used as an adhesive, preferably wood glue. When in contact with wood, most of the PEG absorbs into the wood by capillary action. The remaining mixture cross-links with the hydroxyl groups of the wood surface and forms a strong bond between the wood components.

Claims

A liquid composition for coating surfaces comprising

a film-forming polysaccharide and / or

Polysaccharide derivative with a degree of substitution of less than 3,

a compound having at least one carbaldehyde and / or carbonyl group and which can cause crosslinking of the polysaccharide and / or polysaccharide derivative, and

Solvent in an amount of at least 50% by weight, based on the total weight of the composition,

wherein either the solvent comprises water and / or the compound having at least one carbaldehyde and / or carbonyl group is an aqueous solution, the composition is water soluble and after application and complete crosslinking gives a water insoluble but water vapor permeable, elastic coating.

Liquid composition according to claim 1, characterized in that it is a homogeneous solution.

Liquid composition according to claim 1 or 2, characterized in that the solvent is water.

Liquid composition according to one or more of claims 1 to 3, characterized in that the solvent is an alcohol, diol or polyol or that the solvent comprises an aqueous organic solvent.

Liquid composition according to one or more of claims 1 to 4, characterized in that it is partially crosslinked and has a viscosity of 1.5 to 10 ⁵ mPa s.

Liquid composition according to one or more of claims 1 to 5, characterized in that the polysaccharide derivative is a cellulose ether or ester, a starch ether or ester, alginate with a degree of substitution of less than 3.

Liquid composition according to claim 6, characterized in that the cellulose ether is methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxypropyl cellulose, methyl hydroxyethyl or carboxymethyl cellulose.

Liquid composition according to one or more of Claims 1 to 7, characterized in that it contains at least one non-dissolved filler, the proportion of the filler preferably being 0.5 to 70% by weight, relative to the total weight of the composition.

Liquid composition according to one or more of claims 1 to 8, characterized in that it contains a diol or polyol with an MW of 300 g / mol or less or a hydroxyl-functionalized polymer.

Liquid composition according to one or more of claims 1 to 9, characterized in that the polyol is an aliphatic, cycloaliphatic or aromatic polyol is preferred

Ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propane-1,2- or 1,3-diol, propane triol (glycerol), butane-1,2, -1,3- or -1,4-diol, sorbitol, fructose, galactose , Pentaerythritol or polyvinyl alcohol.

11. The liquid composition as claimed in one or more of claims 1 to 10, wherein the weight proportion of the polyol is in the range from 0.1 to 60% by weight, preferably from 5 to 20% by weight, based in each case on the total weight of the liquid composition.

12. The liquid composition as claimed in one or more of claims 1 to 11, characterized in that the compound having at least one carbaldehyde and / or carbonyl group has a molecular weight of less than 300 g / mol, preferably less than 250 g / mol, and particularly preferred glyoxal, pyruvaldehyde, glyoxylic acid, glutardialdehyde,

Terephthalaldehyde, acetylacetone, salicylaldehyde, vanillin or benzaldehyde.

13. A liquid composition according to one or more of claims 1 to 12, characterized in that it additionally contains urea. 14. A liquid composition according to one or more of claims 1 to 13, characterized in that the proportion of the compound (s) having at least one carbaldehyde and / or carbonyl group is 1 to 50 wt .-%, based on the total weight of the liquid composition , Liquid composition according to one or more of claims 1 to 14, characterized in that it is dilutable with water.

Use of the liquid composition according to one or more of Claims 1 to 15 as wood glue, for coating wood or wood products, textiles, paper, cardboard, ceramics, stone, concrete, gypsum or glass, as floor fastening,

Wood protection paint, graffiti protection, silage foil, roof foil or in cosmetic and medical products.