DE3925451C1 - Decorative film of melamine-formaldehyde resin-coated paper - with outer coating of acrylate copolymer grafted with hardenable styrene-- or methacrylate-copolymer - Google Patents

Abstract

Decorative film (I) comprise a paper carrier with a wt. of 80-120 g/m2, coated with a melamine-formaldehyde resin. (I) is then coated with 30-80 g/m2 of a resin (II) made from an elastic mixt. polymer (A), which is grafted with a hardenable mixt. polymerisate (B). (A) is made by mixt. polymerisation of (a) 78-99 wt.% of an acrylic acid (1-8C alkyl) ester; (b) 1-20 wt.% of a hydroxy (2-4C alkyl) ester and/or a (meth)acrylic acid amide and (c) 0-2 wt.% of a crosslinked monomer with at least 2 reactive non-conjugated double bonds. (B) is made by mixt. polymerisation of (a) 60-80 wt.% styrol and/or a meth-acrylic acid (1-20C alkyl) ester (b) 1-20 wt.% of an N-methoxymethylamide of (meth)acrylic acid (C) 1-20 wt.% of an acrylic acid (1-8C alkyl) ester (d) 1-20 wt.% of a hydroxy (2-4C alkyl) ester of (meth)acrylic acid (e) 1-20 wt.% (meth)acrylic acid amide and opt. (f) 0-20 wt.% acrylonitrile. (II) contains 20-60 wt.% of a mixt. of a hydroxyfunctional polyacrylate (III) with an OH equiv. wt. of 200-600 and a polyisocyanate (IV) with an isocyanate equiv. wt. of 150-230, and/or a polyacrylate-urethane obtd. by reacting (equal amts. of) (III) and (IV). USE/ADVANTAGE - Improved flexibility and weatherability. (I) is used as a decorative covering for wood.

Description

The invention relates to a decorative film consisting of a paper backing with a basis weight of 80 to 120 g / m², which with a melamine-formaldehyde resin with a ratio of melamine to formaldehyde of about 1: 1.5 to 1: 2 in Amounts which correspond to the respective weight of the paper used, impregnated and with 30 to 80 g / m² of a polymerizing resin from an elastic mixed polymer risat A , obtainable by mixed polymerisation of

• a) 78 to 99 wt .-% of an acrylic acid alkyl ester with 1 to 8 carbons atoms in the alkyl radical,
• b) 1 to 20 wt .-% of a hydroxyalkyl ester with 2 to 4 carbon atoms in the alkyl radical and / or an acid amide of acrylic or meth acrylic acid and optionally
• c) 0 to 2% by weight of a crosslinking monomer with at least two reactive, non-conjugated double bonds in the molecule, the reactivity of the double bond can be different,

as a graft base and a hard, brittle copolymer B , obtained by copolymerization of

• a) 60 to 80 wt .-% styrene and / or a methacrylic acid alkyl ester with 1 to 20 carbon atoms in the alkyl radical,
• b) 1 to 20 wt .-% of an acrylic acid alkyl ester with 1 to 8 carbons atoms in the alkyl radical,
• c) 1 to 20 wt .-% of an N-methoxymethylamide of acrylic and / or Methacrylic acid,  
• d) 1 to 20 wt .-% of a hydroxyalkyl ester of acrylic or meth acrylic acid with 2 to 4 carbon atoms in the alkyl radical,
• e) 1 to 20% by weight of acrylic or methacrylic acid amide, the molar ratio of component c to the sum of d and e being about 1: 1 and the ratio of d: e being 4: 1 to 1: 4, and possibly
• f) 0 to 20% by weight of acrylonitrile,

and which is grafted onto A , the weight ratio of copolymers A and B being 1: 3 to 1:20, is coated.

The invention further relates to the use of the De according to the invention Korfilms for the surface coating of wood-based molded articles.

It is known to provide wood-based panels with decorative carrier webs coat the with aminoplast curable at elevated temperatures impregnated with resins and with hardenable or thermoplastic condensers sations- or polymerization resins are coated. You get pro Products with particularly favorable usage properties, if you use Im impregnation of melamine-formaldehyde precondensates and for coating curable polymerization resins, such as copolymers on (meth) acrylic acid ester base or unsaturated polyester resins used. This State of the art is in DE-PS 27 34 669 and DE-PS 34 O3 691 described in more detail.

Such decorative carrier webs are usually produced so that the paper webs used as carrier webs are initially used aqueous solutions of an amino curable at elevated temperatures impregnated with plastic resin. The cellulose fibers are said to be of the paper web are completely encased. This is generally an amount of aminoplast that represents about 50 to 100% of the paper weight speaks, required. The webs thus obtained are described under Ver Avoiding complete curing of the aminoplast resin precondensate dried. The coating of the impregnated carrier webs with the curable polymerization resins are usually made by the Auf pour the in a suitable solvent, e.g. B. methylene chloride,  Methyl ethyl ketone or tetrahydrofuran, dissolved polymerization resin and then evaporating off the solvent.

The paper backing sheets are decorative to achieve the desired Effects printed or colored with a pattern. The angry Polymer resin coatings must be highly transparent be clear and unadulterated to the pattern or color of the paper backing let it shine through.

The application of such decorative carrier webs to the surfaces of wood-based panels or wood-based molded articles can thus be successful conditions that in a heating press at temperatures of about The resinated 130 to 180 ° C and a pressure of about 0.3 to 10 N / mm² Decor carrier sheet on the molded body using a press plate presses on.

These state of the art products have proven themselves and will be in particular for coating wood-based panels or moldings used that are exposed to external weathering. It has However, it has been shown that with prolonged outdoor weathering and associated frequent temperature changes graying and on The surface may become cloudy. The Bil is particularly disadvantageous formation of microcracks, which lead to deeper damage to the Wood-based panels can lead.

Especially if structures are imprinted in the remuneration, such as such as pores in wood decors to give the impression of natural wood the weather resistance is reduced. Already after unwanted graying will be in the pore areas for a short time takes care.

Studies have shown that the embossed Having structures, the layer thickness of the embossing process Polymerization resin is reduced and that presumably thereupon the insufficient weather resistance.  

Particularly weather-resistant films can be used of acrylate copolymers. Such thermosetting Films for coating flat materials are from DE-PS 19 61 452 and DE-PS 22 12 928 known.

In DE-PS 19 61 452 a heat-curable, carrier-free film is claimed which is produced from the mixture of an elastomeric copolymer A and a hard-brittle copolymer B in a ratio of 1:20 to 1: 3, the copolymer A being mixed by polymerization of

• a) 70 to 99 wt .-% of an alkyl acid alkyl ester, the alkyl radical Has 1 to 8 carbon atoms,
• b) 1 to 20 wt .-% of an unsaturated monocarboxylic acid or An unsaturated dicarboxylic acid anhydride, if appropriate
• c) 0 to 20% by weight of a brittle homopoly in the case of homopolymerization merisat resulting vinyl monomers, especially styrene, acrylic nitrile or methyl methacrylate, and optionally
• d) 0 to 2% by weight of a crosslinking monomer with at least two reactive, non-conjugated double bonds in the molecule

and copolymer B by copolymerization of

• a) 60 to 70% by weight of styrene or an alkyl methacrylate, whose alkyl radical has 1 to 4 carbon atoms,
• b) 1 to 20 wt .-% of a glycidyl ester of acrylic or methacrylic acid,
• c) 1 to 20 wt .-% of an unsaturated monocarboxylic acid or an hydrides of an unsaturated dicarboxylic acid, if appropriate
• d) 0 to 20% by weight of a brittle homopoly in the case of homopolymerization Merisat resulting vinyl monomers, especially styrene, acrylonitrile or methyl methacrylate, and optionally
• e) 0 to 3 wt .-% vinyl pyridine

getting produced.  

DE-PS 22 12 928 describes a heat-curable, storage-stable and impact-resistant film which consists of an elastic mixed polymer A , obtainable by mixed polymerisation of

• a) 78 to 99 wt .-% of an acrylic acid alkyl ester with 1 to 8 carbons atoms in the alkyl radical,
• b) 1 to 20 wt .-% of a hydroxyalkyl ester with 2 to 4 carbon atoms in the alkyl radical and / or an acid amide of acrylic or meth acrylic acid and optionally
• c) 0 to 2% by weight of a crosslinking monomer with at least two reactive, non-conjugated double bonds in the molecule, the reactivity of the double bond can be different,

as a graft base on which a hard brittle copolymer B , obtained by copolymerization of

• a) 60 to 80 wt .-% styrene and / or a methacrylic acid alkyl ester with 1 to 20 carbon atoms in the alkyl radical,
• b) 1 to 20 wt .-% of an acrylic acid alkyl ester with 1 to 8 carbons atoms in the alkyl radical,
• c) 1 to 20 wt .-% of an N-methoxymethylamide of acrylic and / or Methacrylic acid,
• d) 1 to 20 wt .-% of a hydroxyalkyl ester of acrylic or meth acrylic acid with 2 to 4 carbon atoms in the alkyl radical,
• e) 1 to 20 wt .-% acrylic or methacrylic acid amide, the molar Ratio of component c to the sum of d and e about 1: 1 and the ratio of d: e is 4: 1 to 1: 4, and possibly
• f) 0 to 20% by weight of acrylonitrile,

has been grafted on. The weight ratio of copolymers A and B is 1: 3 to 1:20.

These films known from the prior art on acrylate copoly merisat basis at temperatures of 130 to 160 ° C and one  Pressure from 20 to 100 kp / cm² pressed onto flat materials, whereby the pressing pressure is maintained for 5 to 20 minutes.

You get largely solvent-resistant and weatherproof Coatings. Such films are therefore preferred for manufacturers position of facade cladding used.

The invention is therefore based on the object of a decorative film Surface coating of wood-based molded articles with a ver improved weather resistance and increased flexibility to create the polymerization resin coating so that through which he increased flexibility even after pressing with profiled press sheet uniform layer thicknesses of the outer protective polymers tion resin coating are guaranteed.

According to the invention, this object is achieved by means of a decorative film designated genus solved, wherein the polymerization resin 20 to 60% by weight of a mixture of a hydroxy-functional polyacrylate an OH equivalent weight of about 200 to 600 and a polyiso cyanate of an isocyanate equivalent weight of 150 to 230 and / or contains the polyacrylate urethanes formed from this, where the hydroxy-functional polyacrylate and the polyiso cyanate in, based on reactive groups, about equivalent amounts lie.

It was surprising to the person skilled in the art that a decorative film in which the Polymerization resin by adding hydroxy functional Polyacrylates and polyisocyanates to those from the prior art known acrylate copolymers, significantly improved evidence shows properties. At the same time, surprisingly, too the flexibility of the polymerisation resin coating of the decorative film improved during the pressing process in that a uniform Layer thickness also in the generated by the profiled press plate Deepening is achieved.

The hydroxy-functional ones distributed in the acrylate copolymer matrix Polyacrylates and the polyisocyanates react to form poly  urethane and thus obviously make the poly more flexible merizing resin.

The modification of the acrylate copolymer with the mixture Hydroxy-functional polyacrylate and polyisocyanate are used in such Amounts that the polymer layer on the decor carrier web about Contains 20 to 60 wt .-% of the polyurethane former. When crossing The properties of polyurethane do not occur within this upper limit wishes to be in the foreground, whereas using less than 20% by weight of the desired flexibility effect and the good loading weather properties can no longer be achieved.

A preferred embodiment of this subject of the invention is there characterized in that the polymerisation resin has a hydroxy function bright polyacrylate with an OH equivalent weight of approx. 400 to 600 and an isocyanate equivalent weight aliphatic polyisocyanate contains from 170 to 200.

Suitable hydroxy-functional polyacrylates with the required equi valent weight are commercially available and are z. B. under the Description Macrynal VSM 1535 offered. It is a polyisocyanate-crosslinking, urethane-modified acrylic resin. The visco quantity of a 70% solution of the hydroxy-functional polyacrylates in Butyl acetate / white spirit in the ratio 1: 2 is about 60 mPa · s.

An aliphatic polyisocyanate is preferably used as the isocyanate turns. This is also a commercially available product te. An example of a corresponding polyisocyanate is that in Han The product Desmodur N 100, which has an NCO content of about 22%, an equivalent weight of about 191 and a viscosity of approx. 8000 to 12 000 mPa · s. These are in particular: Hexamethylene diisocyanate.

The hydroxy-functional polyacrylate and the polyisocyanate are there at, based on the reactive hydroxyl and isocyanate groups, in equivalent amounts added to the acrylate copolymer to be modified puts. Does the acrylate copolymer additionally contain free hydroxyl  Groups, the amount of polyisocyanate can be increased accordingly. This is a very desirable installation of the polyurethane in the Scaffold of the acrylate copolymer causes.

A particularly preferred prior art acrylate copolymer is obtainable from a copolymer A consisting of

• a) 78 to 99% by weight of butyl acrylate,
• b) 1 to 20 wt .-% hydroxyethyl methacrylate and optionally
• c) 0 to 2% by weight of allyl methacrylate,

as a graft base on which a hard-brittle copolymer B , he hold by copolymerization of

• a) 60 to 80 wt .-% methyl methacrylate and / or butyl methacrylate and / or stearyl methacrylate,
• b) 1 to 20% by weight of methyl acrylate and / or butyl acrylate,
• c) 1 to 20% by weight of N-methoxymethyl methacrylamide,
• d) 1 to 20% by weight of hydroxyethyl methacrylate,
• e) 1 to 20 wt .-% methacrylamide, the molar ratio of Component c to the sum of d and e is about 1: 1 and that Ratio of d: e is 4: 1 to 1: 4,

is grafted on. The weight ratio of copolymers A and B is 1: 3 to 1:20.

About this known from the prior art acrylate copolymer The hydroxy radio described above will then become the basis according to the invention tional polyacrylates and polyisocyanates as mentioned above Given quantities.

Particular preference is given to a composition of the hydroxy-functional polyacrylate and polyisocyanate-containing acrylate copolymer of 50 to 70% by weight of acrylate copolymer base composed of graft copolymers A and B as described above, and 50 to 30% by weight of the mixture of hydroxy-functional polyacrylate and poly isocyanate .

The decorative film according to the invention preferably contains as condensation resin precondensate is a melamine formaldehyde resin with a ratio of Melamine to formaldehyde from about 1: 1.5 to 1: 2.

A decorative film in which the condensate is particularly preferred tion resin precondensate is a slow-curing and preferably catalytic converter is peat-free melamine-formaldehyde resin, so that during predrying the paper web impregnated with the melamine-formaldehyde resin the Kon the resin remains as low as possible and only when pressed solution runs at higher temperatures.

The decorative film according to the invention preferably consists of a paper sheet of high-quality cellulose with a basis weight of 80 to 120 g / m², the with a condensation resin precondensate in amounts that the respective the weight of the paper used, soaked and with coat a polymerization resin in an amount of 30 to 80 g / m² is.

When impregnating the paper backing with the condensation resin It is pre-condensate for the production of a perfect product required that all cellulosic fibers of the paper be spread evenly the resin mass are encased, so that a uniform, error-free Carrier web is created. This is accomplished by looking at the amount of con select condensate resin so that it is about the paper weight corresponds.

A decorative film with the polymerization resin is particularly preferred is coated in an amount of 40 to 50 g / m². With this order amount of the polymerization resin, an optimal loading is achieved Layer thickness in terms of flexibility and weather resistance of the decorative film.

Another object of the invention relates to a method for Her position of the decorative film according to the invention, in which one has a paper web with the aqueous solution of a corresponding melamine-formaldehyde har zes soaks and gently while avoiding the hardening of the resin dries and then on the decorative side of the dried carrier  track the solution of a corresponding acrylate copolymer, which 20 to 60 wt .-% of a mixture of a hydroxy-functional poly acrylate of an OH equivalent weight of about 200 to 600 and one Polyisocyanate with an isocyanate equivalent weight of 150 to 230 and / or the polyacrylate urethanes formed therefrom by reaction holds, the mixture of the hydroxy-functional polyacrylate and the Po lyisocyanate in, based on reactive groups, about equivalent amounts are present, applies and the solvent at temperatures from 40 to 110 ° C evaporates and the solution of the acrylate copolymer in is applied in such amounts that after the solution has evaporated by means of the acrylic copolymer on the decorative film with a layer forms a basis weight of 30 to 80 g / m².

First, a paper web with the aqueous Lö solution of a melamine resin precondensate, all cellulose fibers of the paper are completely covered by the melamine resin mass should. Usually this is done by adding a melamine resin amount of condensate in the order of 50 to 100% of the area weight of the paper reached, preferably an amount is used that is equivalent to the basis weight of the paper. The so impregnated Carrier webs are then gently avoiding the curing of the Resin dried.

The decor carrier web prepared in this way is then known per se Coated by the solution of the acrylate of the invention copolymer, which 20 to 60 wt .-% of a mixture of hydroxy-functional polyacrylate with an OH equivalent weight of about 200 to 600 and a polyisocyanate of an isocyanate equivalent weight tes from 150 to 230 and / or those formed therefrom by implementation Contains polyacrylate urethanes, with the hydroxy functional mixture Polyacrylate and the polyisocyanate in, based on reactive groups, about equivalent amounts are poured. The solution of the acrylate copolymers is applied in such amounts that after The acrylate copolymer evaporates in an amount from 30 to 80 g / m².  

In a particularly preferred method for producing the invented According to the decorative film, the polymerization resin is used in an amount applied that after the solvent has evaporated, the acrylate copolymer is present in an amount of 40 to 50 g / m². With these quantities of coating thicknesses have been applied technically proven.

In the process according to the invention, the solvent for Acrylate copolymer preferably uses methylene chloride.

The processing of the decorative films according to the invention takes place in itself known way by pressing the decorative films with the be laminated wood-based molded articles at elevated temperatures, which Hardening of the melamine resin precondensate and the acrylic copolymer Effect surface coating. The pressure required in the Usually used presses is 1.5 to 4.0 N / mm². The tem temperatures during the pressing process are usually 130 to 160 ° C, measured on the surface of the decor carrier sheet. A dwell time of 2 to 6 minutes in the press is usually sufficient, recooling of the coated molded wooden body is not required.

It is also possible to use the coating at the same time to carry out shaping pressing process for the wood material so that Even curved or curved molded parts can be surface coated without any problems can be tet.

The surface of the cured coatings can be selected Corresponding press plates are influenced to the desired extent, the The degree of gloss depends on the surfaces of the press used sheets. There are also structuring through the use of profi Liert pressing plates possible, such as. B. the indentation of pores Achieving the most natural-looking wood structure surface possible.

The weathering behavior of the decorative films according to the invention coated wood materials is excellent. Especially when ver presses with profiled press plates show the invention  Decorative films show their superiority over products of the state of the art Technology, because the layer of polymerisation resin is uniform stratification is also generated in the otherwise critical recesses.

Using the following examples, the decor according to the invention films, their production and their application properties and advantages are explained in more detail.

example 1

This example is prior art and is not according to the invention. The curable acrylic copolymer contains no modifi ornamental.

Preparation of a solution of the acrylate copolymer

A mixture of

• 51 g butyl acrylate
• 6 g of hydroxyethyl methacrylate
• 1.8 g allyl methacrylate
• dissolved in 267 g methylene chloride / methanol (ratio 94/6 by volume)

becomes an elastomeric chew with 0.15 g of azoisobutyronitrile chuk polymerized.

This copolymer A is by adding

• 245 g of methyl methacrylate
• 38 g butyl methacrylate
• 23 g methyl acrylate
• 23 g of N-methoxymethyl methacrylamide
• 8 g methacrylamide
• 12 g of hydroxyethyl methacrylate
• 36 g stearyl methacrylate
• 11 g butyl acrylate  
• dissolved in 300 g methylene chloride / methanol (ratio 94/6 by volume) and
• 3 g of azoisobutyronitrile as a catalyst

a hard-brittle matrix polymer B is grafted on.

Production of a coated carrier web

A paper backing with a basis weight of 80 g / m², wel surface has a decor on one side, with the solution of a melamine resin pre-condensates soaked. The melamine resin precondensate has a Ratio of melamine to formaldehyde of 1: 1.8. The solution ent holds 50% by weight of the resin. The carrier web is dried. You ent holds 100 g / m² resin after drying. On the resinous and dry The carrier web becomes the solution of the copolymer in such a way Quantity poured that after evaporation of the solvent, the Trä contains 40 g / m² of the copolymer. The evaporation of the Lö solvent takes place at 60 ° C. The content of volatile components the coated carrier web is heated to 160 ° C about 3 to 4% by weight over 10 minutes.

Remuneration for a wood-based panel

The following structure is placed in a heatable press:

• Mold with pore structure
• Release paper
• Decorative film
• Barrier film
• Chip molded part

By means of the mold, Holzdekorspezi are in the coating resin fish pores embossed.

The pressing takes place at a temperature of 130 to 160 ° C, one Pressure of 1.6 to 4 N / mm, for a period of 2 to 6 minutes The material to be pressed is allowed to cool in the press.  

Testing the weather resistance

The weather resistance of the tempered surface is in one Short weathering device of the type UV-CON UC1 measured. After about 500 to 700 hours occur in the pore areas Graying on. The weather resistance is insufficient.

Example 2 (according to the invention)

The procedure is as in Example 1. However, the following, he will modified acrylate copolymer used according to the invention:

• 100 g of the acrylic resin solution from Example 1
• 23 g hydroxy-functional acrylic resin, OH equivalent weight approx. 515 (fixed), commercially available under the name Macrynal VSM 1535
• 6 g polyisocyanate, commercially available at the designation Desmodur N 100
• 36 g methylene chloride

The initial viscosity of the resin solution is approximately 100 mPa · s. they increases within a few days and stabilizes after one Week at approx. 1900 mPa · s.

The original theoretical NCO content of 0.7% is reduced at <0.01% within 72 hours.

It is in the same way as in Example 1 with a melamine resin solution impregnated and dried, decorated carrier web with which he modified acrylic resin coated according to the invention. Just like in Example 1 a wood-based panel is tempered and the weathering strength of the surface coating checked. After a test period of 1500 hours in the aforementioned short weathering device are none Recognize changes in the coated surface.

Claims (13)

1. Decorative film, consisting of a paper backing with a basis weight of 80 to 120 g / m², which with a melamine form aldehyde resin with a ratio of melamine to formaldehyde of about 1: 1.5 to 1: 2 in quantities , which correspond to the respective weight of the paper used, impregnated and with 30 to 80 g / m: a polymerization resin made of an elastic copolymer A , obtainable by copolymerization of

• a) 78 to 99% by weight of an acrylic acid alkyl ester with 1 to 8 carbon atoms in the alkyl radical,
• b) 1 to 20 wt .-% of a hydroxyalkyl ester with 2 to 4 carbon atoms in the alkyl radical and / or an acid amide of acrylic or methacrylic acid and optionally
• c) 0 to 2% by weight of a crosslinking monomer with at least two reactive, non-conjugated double bonds in the molecule, the reactivity of the double bond being different,

as a graft base and a hard-brittle copolymer B , it is obtained by copolymerization of

• a) 60 to 80% by weight of styrene and / or an alkyl methacrylate with 1 to 20 carbon atoms in the alkyl radical,
• b) 1 to 20% by weight of an acrylic acid alkyl ester with 1 to 8 carbon atoms in the alkyl radical,
• c) 1 to 20% by weight of an N-methoxymethylamide of acrylic and / or methacrylic acid,
• d) 1 to 20% by weight of a hydroxyalkyl ester of acrylic or methacrylic acid with 2 to 4 carbon atoms in the alkyl radical,
• e) 1 to 20% by weight of acrylic or methacrylic acid amide, the molar ratio of component c to the sum of d and e being approximately 1: 1 and the ratio of d: e being 4: 1 to 1: 4, and possibly
• f) 0 to 20% by weight of acrylonitrile,

and which is grafted onto A , the weight ratio of copolymers A and B being 1: 3 to 1:20, is coated, characterized in that the polymerization resin 20 to 60 wt .-% of a mixture of a hydroxy-functional polyacrylic of an OH- Equivalent weight of about 200 to 600 and a polyisocyanate of an isocyanate equivalent weight of 150 to 230 and / or the polyacrylate-urethane formed therefrom by reaction, the hydroxy-functional polyacrylate and the polyisocyanate in, based on reactive groups, being approximately equivalents There are quantities. 2. Decorative film according to claim 1, characterized in that the polymer a hydroxy-functional polyacrylate of an OH equi valent weight from approx. 400 to 600 and an aliphatic polyiso Contains cyanate of an isocyanate equivalent weight of 170 to 200. 3. Decorative film according to claim 1, characterized in that the polymer risationsharz from an elastic copolymer A , obtainable by copolymerization of

• a) 78 to 99% by weight of butyl acrylate,
• b) 1 to 20 wt .-% hydroxyethyl methacrylate and optionally
• c) 0 to 2% by weight of allyl methacrylate,

as a graft base on which a hard brittle copolymer B , obtained by copolymerization of

• a) 60 to 80% by weight of methyl methacrylate and / or butyl methacrylate and / or stearyl methacrylate,
• b) 1 to 20% by weight of methyl acrylate and / or butyl acrylate,
• c) 1 to 20% by weight of N-methoxymethyl methacrylamide,
• d) 1 to 20% by weight of hydroxyethyl methacrylate,
• e) 1 to 20% by weight of methacrylamide, the molar ratio of component c to the sum of d and e being approximately 1: 1 and the ratio of d: e being 4: 1 to 1: 4,

is grafted, the weight ratio of copolymers A and B being 1: 3 to 1:20. 4. Decorative film according to claim 1, characterized in that the condensate sationsharz a slow curing and preferably catalyst is free melamine formaldehyde resin. 5. decorative film according to claim 1, characterized in that it with the Polymerization resin coated in an amount of 40 to 50 g / m² is. 6. decorative film according to one or more of the preceding claims, characterized in that the paper web made of fine cellulose be stands. 7. Process for producing a decorative film according to one or more of the preceding claims, characterized in that one Paper web with the aqueous solution of a corresponding melamine Soaks formaldehyde resin gently while avoiding curing drying of the resin and then on the decorative side of the dried carrier web the solution of a corresponding Acrylatco polymer, which contains 20 to 60 wt .-% of a mixture of hydroxy-functional polyacrylate with an OH equivalent weight of about 200 to 600 and a polyisocyanate of an isocyanate equivalent lentgewichtes from 150 to 230 and / or the resulting from implementation contains formed polyacrylate urethanes, the mixture hydroxy-functional polyacrylate and the polyisocyanate in, based on reactive groups, approximately equivalent amounts are present and the solvent evaporates at temperatures of 40 to 110 ° C and the solution of the acrylate copolymer in such amounts is applied that after evaporation of the solvent Acrylate copolymer on the decorative film with one layer Weight per unit area from 30 to 80 g / m². 8. A method for producing a decorative film according to claim 7, characterized characterized in that the polymerization resin in an amount is brought in that after the solvent has evaporated, the acrylate  copolymer on the decorative film a layer with a flat surface weight of 40 to 50 g / m². 9. Use of the decorative film according to one of claims 1 to 6 for Surface coating of wood-based molded articles.