CS248374B1 - In particular, the layered material is a polyurethane-based and / or polyurethane-urea-based poromer with a non-coated colored surface layer and a method for its production. - Google Patents

Abstract

A flat laminated material with a non-covering colored surface layer, especially for footwear, clothing and haberdashery applications, especially a polyurethane and/or polyurethaneurea coating, has a non-covering colored surface layer, which is formed by a film of paint, containing, in addition to binders, especially based on polyacrylate or polyurethane aqueous dispersions, other common additives, especially surfactants, thickening components, crosslinking agents, defoaming additives and flow-promoting agents and, based on the dry matter, 0.05 to 5% by weight of transparent pigments of basic colors in spectrally pure color shades or shades close to these spectrally pure shades, which can be used individually or combined with each other in corresponding weight ratios, or even further combined with the addition of 0.5 to 5% by weight of a pearlizing or metallizing additive, depending on the desired resulting color effect.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a sheet laminate having a non-covering colored surface layer, in particular for footwear, clothing and haberdashery applications, in particular polyurethane and / or polyurethane urea porcers. The invention further relates to a process for the production of such sheet materials.

Surface treatment of raw face of flat materials for shoemaking, clothing and haberdashery applications, resp. other materials of a similar nature are required for several reasons. The main thing is that these treatments cover both minor and larger defects in the surface of the material, giving the product the desired shades, the desired degree of gloss, design and pleasant touch.

In the case of poromeric materials, in addition to all these functions, it is necessary for the face to remain partially permeable (via micropores) to the water vapor from within, but impermeable to water and dust from the outside to maintain good flexibility and to gain better resistance to mechanical damage.

Currently used surface treatment of flat materials usually consists of two to three qualitatively and functionally different, very thin layers. The base adhesive layer is usually tinted with dyeing agents to a shade which is - due to the possibility of deep damage during use - related to the color of the raw face.

Another layer - protective - is colorless with perspiration, resistant to mechanical and weathering. Some sheet materials are still provided with a layer of effect patterns that is sandwiched between the base and protective layers.

The base layer is most often formed by a film of a water-dispersion paint containing a polymeric binder and various specifically active ingredients. At present, mainly polymers or copolymers based on acrylates, urethanes and vinyl compounds or polymers are used as polymeric binders for these layers. and their mixtures, which ensure very good consistency with the face of commonly used flat materials and positively affect some of their mechanical properties - especially resistance to repeated bending.

Specifically active ingredients are understood in particular to be inorganic, semi-organic and / or organic pigments and dyes, respectively. more generally, so-called beauty agents, furthermore, surfactants to promote the dispersion of particles, flowing, respectively. penetration capacity, crosslinking agents, viscosity regulators, suds suppressors, etc.

Generally, compared to solvent systems, water-dispersion systems require a more careful choice of campers, since in addition to the compatibility and properties required by the application technology, they must also provide the necessary mechanical and electrolytic stability.

For protective coatings, resp. for patterned layers, mostly paints based on solutions of polymeric binders in organic solvents are used. Protein products / e.g. casein), cellulose esters, polyurethanes, polyamides, vinyl polymers or copolymers, or mixtures of some of these.

Other components of these coatings are especially UV-stabilizers, frosting or matting agents, touch-improving additives, etc.

In terms of the final appearance of the sheet material, they are one of the most important components of the paints for the base or surface coatings. also protective layers of surface treatment with pigments, resp. dyes. Depending on the hiding power of these components, the existing surface finishes of the sheet materials can be divided into essentially three groups: standard hiding, semi-hiding and transparent.

This division is more general - for example for natural materials. It is possible to say that tanuto distributions are adequate treatments known in tanneries - in the covering, semlaniline and aniline series.

Generally, the problem of virtually all surface treatments currently used is to achieve the desired range of color shades throughout its width, which is due both to the variety of different applications of sheet materials and to the relatively very frequent alternation of fashion shades.

For color tinting of paints for base and / or paints. even protective coatings are used either only individual pigments / dyes / of certain color shade, while of course it is possible to change only the color saturation / by changing the concentration of pigment in the paint, respectively the respective coating layer /, or a combination of two or more pigments / dyes / different shades, which, although it is possible to adjust the mutual coloring of the individual pigments / dyes / different shades, but in virtually all the hitherto known processes, this is only a limited range of related shades, representing only a certain area of the spectrum.

In case it is necessary to prepare new fashion color shades, it is usually necessary to always look for new combinations of pigments.

To a large extent, a sheet composite having a non-covering colored surface base layer according to the invention contributes to solving this problem. This layer consists of a film of paint containing besides binders, in particular based on a polyacrylate or polyurethane aqueous dispersion, other conventional additives, in particular surfactants, thickening components, cross-linking agents, antifoaming agents and flow-promoting agents.

It is an object of the invention that the non-covering colored surface layer comprises, based on dry matter, 0.05 to 5% by weight. % of transparent pigments of base colors in spectrally pure shades or in shades very close to these spectrally pure shades, which, depending on the desired resultant color effect, can be used singly or combined in corresponding masses. or even further combined with an addition of 0.05 to 5 wt. % of dry matter by beading or metallizing additives.

The following pigments can be used as arbitrarily combinable transparent pigments of base colors in shades very close to the spectrally pure shades of these colors:

1. for yellow color disazo pigment labeled according to International Color Index / Pigment Yellow 155;

2. for the red color of the azo-condensation pigment labeled Pigment Red 214;

3. for the blue color of the beta-form of Cu-phthalocyanine with the designation Pigment Blue 15: 3.

The principle of the process for producing a sheet material having a non-covering colored surface layer according to the invention is to apply a surface of the sheet material to a white or white masking intermediate layer (in the case of non-pearlescent or metallizing additive coating). uniform shade of water-dispersion paint.

This paint is tinted by one of the transparent pigments of the base paints, respectively. by combining these pigments with one another and, depending on the desired color effect, optionally further comprises a pearlescent or metallizing additive.

The applied base coat is fixed by drying or sieving. When applying coatings which contain pearlescent or metallizing additives, the deposition of the protective layer is prevented by the further application of the base coat.

Finally, a thin, mostly colorless protective layer is applied by sweat.

The color tinting of the coating composition is preferably carried out by mixing the premixes of the individual pigments, the combination of which gives the desired color shade, the color intensity of which can be further controlled by the addition of a colorless mixture.

The main advantage of the color coatings according to the invention lies above all in the versatility of their use. In fact, by virtue of the combination of the pigments of the basic colors (in particular the pigments specified above), virtually every color shade can be prepared relatively easily.

Due to the fact that they are non-covering coatings, it is possible to further reduce or increase the saturation of the respective shade by changing the thickness of the applied coating layer. This principle also relies on the specific shading effect of non-opaque color coatings applied to the embossed surface.

Indeed, due to the different thickness of the surface treatment layer, the depressions of the design are more intensely colored than the other face of the cheek, and this effect is not identical to the so-called coating treatments, since it occurs in a single application operation.

The following examples serve to illustrate the invention in greater detail:

Example 1

For base coatings, the application of which is given in tonto and in other examples, paints of the following composition in / wt. % /:

Folders

Dose for paint A B C D Ε P demineralised water yellow disazopigment labeled · Pigment Yellow 155 / hydrophilized powder in granular form with a pigment base content of 75% by weight red azo-condensation pigment labeled Pigment Red 214 (detailed specifications as for yellow pigment) /

Cu-Phthalocyanine Pigment Blue Pigment Blue 15: 3 / Specification is the same as Yellow Pigment Blue

Beading agent based on mica and titanium dioxide (hydrophilized powder with particle size 5 to 130 µm)

28.2 55.0 52.0 54.0 54.0 54.0

Claims (4)

1. Sheet laminate, in particular a polyurethane and / or polyurethane-based poromer with a non-covering color coating based on a film of a coating composition containing, in addition to binders, in particular polyacrylate or polyurethane aqueous dispersions, other conventional additives, in particular surfactants, thickening components , cross-linking agents, antifoaming agents and leveling agents, characterized in that the non-covering colored surface layer contains 0.05 to 5 wt. % of transparent pigments of base colors in or near the spectrally pure color shades, which, depending on the desired color effect, can be used individually or combined in corresponding weight ratios, or even further combined with an addition of 0.5 to 5 wt. % of dry matter by beading or metallizing additives. 2. The sheet laminate of claim 1, wherein the transparent yellow pigment is a disazo pigment having an International Color Index / Pigment Yellow 155 designation, a transparent red pigment and an azo condensation pigment designation Pigment Red 214, and transparent blue pigment beta-form Cu-phthalocyanine with Pigment Blue 15: 3. 3. The sheet material of claim 1, wherein the pearlescent agent is a silver titanium dioxide and mica pigment in the form of a hydrophilized powder having a particle size of 5 to 250 .mu.l. 4. A method according to claim 1, characterized in that, in the case of a coating which does not contain nacrelating or metallizing additives, the face of the sheet material is uniformly applied to the white or white masking intermediate layer. a layer of a water-dispersion paint, which is tinted by one of the transparent pigments of the base paints, respectively. by combining these pigments together with the desired color effect, it optionally further comprises a pearlescent or metallizing additive, whereupon the base coat is fixed by drying, optionally while sieving, and coated with a protective layer, while applying coatings containing pearlescent or metallizing additives precedes layer of the respective surface treatment.