WO2010023261A2 - Surface coating system comprising decorative particles, such as mother of pearl or amber, and method for the production thereof - Google Patents

Abstract

The invention relates to a surface coating system, and to a method for the production thereof, comprising decorative particles (3), such as mother of pearl or amber, the surface coating system being characterized in that a filling layer (4) comprising decorative particles (3) and a top layer are arranged on a surface element (1), wherein the decorative particles (3) have a screening size of between two millimetres and ten millimetres and are embedded in the filling layer (4) in random orientation and in that the filling layer (4) and the top layer are formed by a transparent light-transmissive synthetic resin.

Description

 Surface coating system with decorative particles, such as mother of pearl or amber, and process for its preparation

The invention relates to a surface coating system with decorative particles, such as mother of pearl, amber or the like, and a method for its preparation and a method for producing a molded article having a surface coating with decorative particles.

Decorative particles should be understood to mean particles which are perceived as particles in the surface coating system by the viewer of the surface due to their optical properties. Such particles are, for example, pearl particles or amber particles.

Mother-of-pearl is a noble, natural material from the shells of mollusks, which iridescent when light falls this and is used from time immemorial for the decoration of surfaces of valuable objects.

The mother of pearl-containing materials are laid, for example, as mosaics or used for inlays in furniture surfaces, ornaments or weapon handles. The decoration of surfaces with mother of pearl is a laborious and costly design, in which only surfaces of relatively small objects are provided with this noble material.

Furthermore, the use of nacreous particles in paints and surface coating systems containing them is known in order to use these for particularly high-quality articles. For example, goes from the

DE 30 05 411 C2 discloses a process for producing a transparent, flexible

Laminates, which comprises a first transparent layer of an unsaturated polyester resin composition and a second layer of a likewise unsaturated polyester resin composition and a support material

Fiberglass or synthetic fiber, on which a third layer is applied, which consists of an unsaturated polyester resin composition and this added calcium carbonate and color pigments. As color pigments even the smallest pearl particles are used.

It can be seen from DE 30 05 411 C2 that the inert fillers should be of particularly fine grain size.

A further use of nacelle-containing particles is disclosed in DE 100 06 270 B4, which discloses a coating method and a metal component produced therewith, in particular for the automobile industry. According to the teachings of the invention, a metal component produced by diecasting from an aluminum or magnesium material is provided with a coating which has an adhesion-promoting layer with the component, an unevenness of the component surface compensating intermediate layer and a topcoat, wherein the intermediate layer with an organic resins modified silicone resin and has a layer thickness of 10 microns to 50 microns. The nacreous particles are added as pigments to the basecoat layer within the topcoat layer. The layer thickness of the basecoat layer is then for example 10 to 50 microns.

The stated prior art has the disadvantage that the coating systems contain the mother-of-pearl-containing particles only as color pigments of the smallest geometrical dimensions and thus indeed produce a mother-of-pearl effect, but this effect is far removed from the aesthetic impression produced by natural mother-of-pearl. The technical problem is obviously in the industrial and artisanal processability of natural materials with undefined shape and size.

Amber is an opaque to clear fossil resin, which is used as a gem stone whose color is pale yellow, brownish or yellowish white. According to the chemical structure, amber is a combustible Resin acid polyester having a Mohs hardness of 2 to 2.5 and a density of 1.05 g / cm ³ to 1.10 g / cm ³ . It is known to integrate amber in mosaics, but is not possible to process smaller pieces industrially or technically economically.

The object of the present invention is to provide a coating system with decorative particles, such as mother of pearl or amber, which is suitable in its construction to accommodate larger particles in the coating system, with no laborious manual placement of the mother of pearl or amber particles in the coating system should be required.

The object is achieved by a surface coating system with decorative particles, such as mother of pearl or amber, in which on a surface element a filling layer with the decorative particles and a cover layer are arranged, wherein the decorative particles between 2 mm to 10 mm screen size and in random orientation are embedded in the filling layer, wherein the filling layer and the cover layer are formed of a transparent translucent synthetic resin.

The decorative particles are as natural products, such as mother of pearl or amber particles, while mostly irregularly shaped particles, such as the mother of pearls as fragments of shells of molluscs.

The surface coating system is advantageously formed, particularly in the case of a substrate which is critical in terms of adhesion, elongation and stress, in that an adhesion-promoting layer of synthetic resin is arranged between the filling layer with the decorative particles and the surface element. Particularly in the case of an absorbent substrate or larger differences in the coefficient of expansion of the substrate and the coating system, an adhesion-promoting layer is used.

Of particular advantage is an embodiment of the invention, which has additional pigments or dyes within the filling layer and top layer and the filling layer and optionally the cover layer can thus be formed in any adjustable light transmission to achieve a depth effect of the surface. The decorative perceptible in the surface coating system particles, the surface coating system even for surfaces with presentation and representation function is advantageously used.

A particularly advantageous effect is that, according to a further embodiment of the invention, a reflection layer is arranged in the direction of the light incidence after the filling layer. Accordingly, this is located between the filling layer and the surface element or between the filling layer and the adhesion-promoting layer. The reflection layer may be formed, for example, of metal or metal-like, light-reflecting materials, in particular of a layer of bonded metal powder. It is necessary to provide an adhesion-promoting layer between the reflection layer and the surface element.

According to an advantageous embodiment of the filling layer, this in turn is formed of two layers, an adhesive layer for the point fixation and a make coat for the embedding of the decorative particles. The adhesive layer, which is formed relatively thinly on the surface element, fixes the decorative particles in their position during the application process it is possible to enrich the spaces between the individual particles selectively or with a random deposit of particles with them.

A further embodiment of the invention consists in designing the surface element as reinforcing layer of a fabric, fiber or fleece soaked in synthetic resin. In the surface coating system, the synthetic resin is selected from the group consisting of epoxy resins, polyester resins, polyurethane resins, acrylic resins or mixtures thereof, as a single or multi-component resin.

Of particular advantage is the use of epoxy resins for surface coating applications in aircraft and shipbuilding, which is due to a high depth effect with low layer thickness and consequently low weight. The surface coating system can be adjusted by grinding to a layer thickness of one millimeter, for example, without losing the depth effect of the surface.

Furthermore, this resin is very durable and relatively elastic, which is important for surfaces with partial bending stress.

The process for producing a surface coating with naculate-containing particles can be characterized as follows:

on a surface element, a filling layer of synthetic resin with decorative particles is applied as a suspension or

a filling layer of an adhesive layer for the decorative particles and a make coat for the embedding of the decorative particles is applied to a surface element, the filler layer is ground flat and polished after curing.

In the case of smaller particles with a sieve size of 2 to 3 mm, a correspondingly thin layer can be ground. The method according to the invention is advantageously further developed in that, in the case of a surface element made of absorbent material, first of all an adhesion-promoting layer of low-viscosity synthetic resin is used for shutting off the surface.

After the filling layer has been applied with the nacreous particles, it is advantageous to roll them before curing in order to achieve a coarse alignment of the particles without individually aligning the particles.

In general, the aesthetic concept consists precisely in the fact that the individual particles are not all arranged in the same orientation in order to achieve effects of different reflections of the particles containing nacre when light is incident.

In order to increase the concentration of the nacreous particles in the filling layer, the filling layer can be enriched with additional decorative particles by subsequent sprinkling prior to curing. The surface coating system and the method for producing the same is particularly advantageous in that the transitions from one surface element to another or subsequently attached areas of the surface coating system can be produced by the same treatment method and, in retrospect, the transitions between the regions produced differently than time hardly are perceptible. As a result, the system is ideally suited to produce even large areas of individually prefabricated elements, which are assembled at the respective site, connected to each other and the transitions with the surface coating system aftertreated, without visible transitions between individual elements can be seen. Also, the repair or replacement of whole elements of a panel system, for example are relatively simple and inexpensive possible, since the resulting damage to the surface easily with the

Surface coating system are repairable.

It is particularly advantageous to complete the filling layer with a hard-wearing covering layer and to sand and polish the filling layer or, if appropriate, thereafter the covering layer in front of it.

A further advantageous embodiment of the invention for producing a molded part with a surface coating with decorative particles is that first a negative mold of the molded part is provided with a release layer, the filling layer with the decorative particles or the adhesive layer and then the decorative particles and the build-up layer for the Embedding the decorative particles is applied and then the reinforcing layer for the filling layer is applied, after which the filling layer and the reinforcing layer harden and the negative mold and the release layer are finally removed. It is advantageous to grind and polish the surface of the filling layer and optionally to provide the surface of the filling layer with a covering layer.

An advantageous alternative is to apply the cover layer directly to the release layer and then to apply the fill layer and the reinforcement layer. As a result, the complex grinding of the surface formed on the separating layer can be almost completely avoided, since the particles sink through the filling layer and deposit directly over the covering layer.

A further advantageous embodiment is that a structure is introduced directly into the cover layer during construction and thus, for example, an anti-slip structure without subsequent processing in a shower tray or similar sanitary elements can be formed. The surface treatment of the filler layer or of the cover layer takes place, depending on the application, by dry grinding, for example in applications of the surface coating system for furniture such as tabletops, wall panels or cabinet fronts and the like.

Alternatively, the wet grinding of the coating system for certain applications, such as wall elements, floor elements,

Sanitary furniture surfaces, shower trays or the like possible.

Particularly dense arrangements of decorative particles can be achieved by mixing different particle sizes. With relatively small grain sizes of the particles, the synthetic resins of the filling layer can be mixed with the particles before application and applied together to the surface. The synthetic resins suitable for use in the surface coating system of the present invention can also be classified according to their processability and function as cast resins, embedding resins, adhesive resins and resin putty.

Air bubbles in the coating systems are minimized by shaking and by the use of low viscosity synthetic resins.

Of particular aesthetic effect is that the individual particles as

Fragments placed in random orientation in the system and subsequently not, or only roughly aligned.

The binding of the decorative particles in the filling layer takes place as appropriate

Concentration of additional pigments by means of colorless, transparent to almost opaque synthetic resins.

Particularly effective is the additional use of the smallest nacreous pigments for coloring the synthetic resins of the filling layer in this

Application. The surface of the filling layer is advantageously easily structured by polishing with felt disks, since the different hardnesses of the particles and of the filling layer are worked out by this treatment and thus can be perceived haptically.

The formation of the coating system of transparent synthetic resins enables the indirect illumination of transparent objects with this transparent coating system.

The coating system has a thickness of 1 mm to 8 mm depending on the thickness and size of the decorative particles.

Further details, features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. Show it:

1 surface element with coating system,

Fig. 2: surface element with coating system and reflection layer and

Fig. 3: molded part with coating system.

In Fig. 1, a surface element 1 is shown with a coating system. As a surface element 1 is a partition in lightweight construction with a non-critical background selected in this case by way of example. On the surface element 1, the decorative particles are applied as a mother-of-pearl containing particles 3 as a suspension with the filling layer 4 on the closed surface element. The nacelle-containing particles 3 are thus embedded and contained directly in the filling layer 4. After curing of the filling layer 4 with the nacelle-containing particles 3, the surface of the filling layer 4 is ground, polished and with a Cover layer 5 made of synthetic resins, in particular of clear epoxy resin or polyurethane resin, coated.

As a result, a similar structure of the surface coating system is obtained when an adhesive layer is applied directly to the surface element 1, the mother-containing particles 3 are scattered and then a build-up layer for embedding the mother-of-pearl containing particles 3 is applied, followed by grinding and applying the cover layer 5 of synthetic resins ,

For relatively small particles of 2 to 4 mm, the application is realized by means of a suspension and between 5 to 10 mm particle size, the application by scattering in the filling layer 4 is applied.

FIG. 2 shows a surface element 1 with a coating system with reflection layer 8. The peculiarity of the surface coating system shown in FIG. 2 consists in a reflection layer 8 provided between the surface element 1 provided with an adhesion-promoting layer 2 and the filler layer 4 with the particles 3 containing mother-of-pearl. The reflection layer 8 is functionally designed as a light-reflecting layer. For this purpose, bound metal powder is used, which is connected via the adhesion-promoting layer 2 with the surface element. The filling layer 4 is designed in this embodiment of the invention as a transparent to colorless layer, so that light from the outside first of the nacelle-containing particles 3 can be iridescent reflected and additionally through the filling layer 4 penetrating light at the reflection layer 8 is reflected and reflected, which creates additional lighting effects. For mechanical and chemical protection of the surface coating system and in particular of the nacelle-containing particles 3 contained in the filling layer, a covering layer 5 is finally applied to the system on the surface. FIG. 3 shows a molded part which is provided with a surface coating system with particles containing nacre.

The molding itself is first formed by a negative mold 9 of the molding, for example, a shower tray from the sanitary area. The negative mold 9 is expediently covered with a separating layer 6, which enables the subsequent separation of the molded part from the negative mold 9 after curing of the surface coating system with corresponding reinforcing elements. On the negative mold 9 with the separating layer 6, the filling layer 4 is then applied with the mother of pearl-containing materials 3.

Alternatively, not shown in Fig. 3, the cover layer 5 is applied directly to the release layer 6 and structured by a structure in the release layer 6 with an anti-slip effect.

Subsequently, the filling layer 4 is occupied in not yet cured state with a reinforcing layer 7. The reinforcing layer 7 consists of a glass fiber or carbon fiber support structure or of textile fabrics or fleeces. After curing of the reinforcing layer 7 and the associated with this filling layer 4 with the mother of pearl particles 3, the negative mold 9 of the molding can be separated with the aid of the release layer 6 and the now visible surface of the filling layer 4 ground as required, polished and optionally subsequently with a Cover layer 5 are provided.

In the preferred, not shown embodiment of the introduction of the cover layer 5 directly on the release layer 6 optionally eliminates a subsequent treatment by grinding completely, which is a great advantage of this procedure. The formation of curved surfaces with this coating system is possible both in this way, as well as by the technique of Aufachteinsins the filling layer 4 on vertical or deviating from the horizontal surfaces of surface elements. 1

An alternative embodiment of the invention is achieved in that amber particles are used as decorative particles. Crucial conception of the invention is that the decorative particles show optical effects, which in the surface coating system for effect on the viewer of the surface.

The advantages of the invention are, in particular, that surface coatings and elements are produced which have a high proportion of nacreous and thus reflective elements on the surface. Thus, a surface coating system is provided, which can be produced by handcrafted and industrially feasible and automatable process steps in large areas and thus cost and uniform quality.

LIST OF REFERENCE SIGNS

1 surface element

2 adhesion layer

3 decorative particles, such as mother of pearl or amber

4 filling layer

5 topcoat

6 separating layer

7 reinforcement layer

8 reflection layer

9 negative mold of the molding

Claims

1. surface coating system with decorative particles (3), such as mother of pearl or amber, characterized in that on a surface element (1) a filling layer (4) with decorative particles (3) and a cover layer are arranged, wherein the decorative particles (3) between have two millimeters to ten millimeters screen size and are embedded in random orientation in the filling layer (4) and that the filling layer (4) and the cover layer of a transparent translucent resin are formed. 2. Surface coating system according to claim 1, characterized in that the decorative particles (3) are irregularly shaped. 3. Surface coating system according to claim 1 or 2, characterized in that between the surface element (1) and the filling layer (4) an adhesion-promoting layer (2) is arranged made of synthetic resin. 4. Surface coating system according to one of claims 1 to 3, characterized in that the filling layer (4) contains additional pigments or dyes. 5. Surface coating system according to one of claims 1 to 4, characterized in that between the surface element (1) and the filling layer (4) or between the adhesion-promoting layer (2) and the filling layer (4) a reflection layer (8) is arranged. 6. Surface coating system according to one of claims 1 to 5, characterized in that the filling layer (4) of an adhesive layer for the decorative particles (3) and a build-up layer for the embedding of the decorative particles (3) is formed. 7. Surface coating system according to one of claims 1 to 6, characterized in that the surface element (1) as a reinforcing layer (7) made of a synthetic resin-impregnated fabric, fibers or nonwoven fabric is formed. 8. Surface coating system according to one of claims 1 to 7, characterized in that the decorative particles (3) are mother-containing fragments of mussel shells or snails. 9. A process for producing a surface coating with decorative particles (3), such as mother of pearl or amber, in which on a surface element (1) a filling layer (4) made of higher-viscosity synthetic resin with decorative Particles (3) is applied as a suspension or a filling layer (4) of a decorative adhesive layer (3) and a construction layer for embedding the decorative Particles (3) is applied and the filling layer (4) ground flat after curing and polished and that the filling layer (4) is provided with a cover layer (5). 10. The method according to claim 9, characterized in that the Surface element (1) with a bonding layer (2) made of low-viscosity synthetic resin is shut off. 11. The method according to claim 9 or 10, characterized in that the filling layer (4) is rolled with the decorative particles (3) before curing. 12. The method according to any one of claims 9 to 11, characterized in that in the filling layer (4) before curing decorative particles (3) are nachstrereut. 13. A process for the production of a molded article with a surface coating with decorative particles (3), wherein a negative mold of the molded part is provided with a release layer (6), the filling layer (4) with the decorative particles (3) or the adhesive layer and then the decorative particles (3) and the make coat for embedding the decorative particles (3) is applied and then the reinforcing layer (7) on the filling layer (4) is applied, after which the filling layer (4) and the reinforcing layer (7) harden and the negative mold (9) and the separating layer (6) are removed and the Surface of the filling layer (4) is provided with a cover layer (5). 14. The method according to claim 13, characterized in that the Cover layer (5) is applied directly to the release layer (6) and cured. 15. The method according to claim 14, characterized in that the Cover layer (5) when applied to the release layer (6) is designed with an anti-slip structure.