Wärmedämmplatte.

[0001] The invention concerns a Wärmedämmplatte, in particular a Wärmedämmplatte for the thermal insulation comprehensively a Dämmplatte coated by external facades, base ranges, walls, covers, roofs or other parts of buildings, respectable reflector plate from expanded polystyrene (EPS).

Dämmplatten from expanded polystyrene for the isolation of building parts are sufficiently well-known among other things. They are manufactured e.g. by expansion by styrene polymer particles in steam chambers and following cut.

For improvement of the insulating efficiency beside thicker plates increasingly also such are made, which contain supplementing particles with dark pigments, e.g. of soot, coloring materials, Grafit among other things the portion of the pigmented styrene polymer particles can 10-90 Gew. - % amounted to, e.g. see. DE-U-20 315,226, whereby a portion of 30Gew. - % or in particular of 50 Gew. - % of pigmented particles as particularly favourable, respectable only one Dämmplatte with a relationship of 50:50 is regarded is actually manufactured.

Further also Dämmplatten from polystyrene are well-known, the one portion of 0,5-5 Gew. - % (EP-B-0 620,246) or 2-8 Gew. - contain % (EP-B-0 981,574) atherman working additives, whereby a styrene polymer contains 981,574 in accordance with EP-B-0 still additionally a flame protection means, in particular organic bromine connections.

In the EP-A-1 213 1 18 a procedure for the production of a foam material plate is revealed, which is formed from two output plates. The output plates, which should be extruding strikeless at the contact surfaces, are part-laminar interconnected by means of an diffusion-open adhesive and or by mechanical liaison vehicles. The mechanical liaison vehicles consist thereby preferentially of the material of the output plates.

It is further well-known to arrange a dark reflector plate between two white cover plates (JP-A1 1,058,576 or JP-A-2003 193,586) or plates from polystyrene with thinner plates from polyurethane foam (EP-A-1 201,838) to connect. With a similar Dämmplatte in accordance with DE-U-8 the plate consists 226,114, which is used in particular for flat roofs, of a damming bottom layer of expanded polystyrene and a protective layer directed outward of a synthetic material.

In accordance with DE-A-19 914,105 a Wärmedämmplatte can be provided also with a taking off close layer from hollow balls, which are embedded in a support. This layer from hollow balls is to improve the insulation value with same slab thickness substantially.

In the DE-B-10 2005 031,133 a foam material plate is descriptive for thermal insulation, the 10-90 Gew. - % pigmented styrene polymer particles contains, whereby a surface of the foam material plate is at least partially provided with an anti-reflection layer. This anti-reflection layer is a coating material with at least one bonding agent, a Weisspigment and further additives. Admits is also to use in place of a dye film a foil.

The EP-A-2 111,962 reveals a procedure for the production of a Wärmedämmplatte, which is to be provided a core with a reciprocal steam barrier layer, on which still a surface layer is applied. Here on the steam barrier layer first an adhesive from low melting material is applied, on which expandable beads from EPS are loosely up-poured. These EPS beads are expanded afterwards under thermal effect, whereby the temperature is so highly selected that the adhesive layer softens.

After the EP-A-1 201,838 a thick Dämmplatte from PU (PU) is reciprocally coated with one thin plate each from EPS.

With one-further plate for wall lining in vehicles in accordance with DE-U-202006 a foam material layer from PP or PE on a side provided 016,435 with a decoration layer and on the opposite side is among other things with a barrier layer made of PET foam. Between the layers still fleece layers can be intended.

The task of the invention consists now of it, a Wärmedämmplatte, in particular for the thermal insulation of external facades, base ranges, under terrain, creating in the flat roof range as well as walls or other parts from buildings to which is simply and economically producible and qualitatively high-quality.

To be made available is a Wärmedämmplatte, which exhibits improved insulation value and at least one auxiliary function.

The task is solved with the characteristics of the patent claim 1.

A Wärmedämmplatte covers a foamed (and thick prefers) Dämmplatte and a surface layer whereby the surface layer in only one work procedure is applied on the Dämmplatte, present at, preferentially from expanded polystyrene (EPS) and a good adhesion between the layer and the Dämmplatte as well as a good accuracy to size with small expenditure to be achieved to be supposed.

The surface layer is preferentially located on a long side of the Dämmplatte and can serve decorative purposes and/or cause a protection against heating due to sun exposure. Preferred the surface layer exhibits from there athermane working additives in sufficient quantity, whereby it is to be noted that obligatory standards can require a white surface.

The Dämmplatte exhibits into well-known way colored, if necessary also white, and dark pigments containing particles, in particular Grafitpartikel, whose portion can vary depending upon requirement. Preferred the Dämmplatte contains pigmented particle as reflector plate to 100%.

The surface layer is prefers a foam material layer from PU, Polyisozyanurath (PU) or similar sticking foam material or a bead surface layer, in particular an a bead surface layer from EPS beads or EPSSchrot, respectable recycling material, which are applied on an Hotmelt adhesive or a foam adhesive.

A foam material layer is applied as thin foam or foam adhesive film on the Dämmplatte full-laminar or only in form of a sample or a structure (the reflector plate remains then partly visible), this can take place also by means of a film of the adhesive. Afterwards the surface, e.g. with PU, is moistened thus the adhesive film foams on and during the reactive time (first a skin forms) on the surface of the foam layer a sample is stamped or it takes place a aufrauen through to over-sharpen. This around the group with a surface layer, usually sticking mortars, to improve to the improvement of the adhesion the foam layer aggregates can do such as sand o. A. to be added. The connection to the Dämmplatte can be further improved by rollers of the surface layer. By only partly lay to the surface layer on can material be saved, the partial surface layer-free will place by the shade throw of the surface layer verschattet. From the partial order results a larger surface, which develops a better adhesion with the surface layer, usually for a sticking mortar. It admits is that the alga formation with centralthick and thick finery system arise substantially more rarely due to the larger mass.

With the solution with the surface layer with foam adhesive can by the use of solid aggregates, as blowing clay/tone, pumice stone or similar materials the desired effect are reached, even if the structure remains thin (thin section procedures).

For applications within the roof range and within the range of behind-ventilated fronts the layer is smoothed. Flat roofs which with hot-adhesive bitumen courses are implemented to need on EPS plates or EPS Gefällsplatten a layer from PURoder PIR plates, since the EPS plate would melt. The layer of the PU-foam is laid on within the flat roof range up to 2 cm thickness, so that the warmth does not arrive up to the EPS layer.

The surface layer contains flame retarding materials, in the further one can of additives be mixed, which prevent the Inseketenfrass in behind-ventilated fronts (insecticides). With compact fronts the alga formation is well-known.

It admits is that in coating materials fungicides and Algizide are mixed. These are washed however in the process of the time. In the surface layer a depot at Algizid and fungicide can be brought in, which protect slowly by adhesive-walked and so the front longer.

In order that ascend the fire with behind-ventilated fronts to prevent, can be provided the surface layer with a source layer forming aggregate or a swelling, insulating layer-forming painting. Thus the air gap between Fassadenverkleidung and insulating layer is closed, the oxygenation for the fire is stopped.

Besides the plates can be designed as fire bolt screen end of elements, this are demanded in compact fronts. Around this fire protection the plate will achieve provided PU-layer all around coated with a insulating layer-forming, swelling aggregates. If necessary, the elements are strengthened by high temperature-steady fleeces, mineral wool or protected metal parts.

An a bead layer becomes through orders, interspersing o. such of the EPS beads on the Dämmplatte providing with an adhesive in an educated manner. The adhesive can be attained up-foaming around a better adhesion. Likewise the beads can be mixed together with the adhesive and laid on, what makes on the one hand a reduction of the adhesive need and on the other hand a better Schleifbarkeit for the surface possible. The spatial surface of the bead layer makes possible also a better plaster bond.

The invention makes an improved insulation value possible with small materials requirements.

The adhesion between surface layer and Dämmplatte is comparable in all variants with conventionally welded plates.

In order to achieve an acoustic decoupling, is also possible in modification to plan additionally to the surface layer a layer on the inside in a sand yielding arrangement between two Dämmplatten. It is possible, the centric foam layer on the inside to attach as side arranged to wall. The layer with sound-absorbing effect consists of flexible foam.

The thickness of the surface layer amounts to prefers less than 10% of the thickness of the Dämmplatte. With a pure foam layer the preferential color is white. In preferential execution with polystyrene beads as aggregate the material of the surface layer is to a large extent to completely white-yellow, orange or yellow/orange pigmented (also knows is possible) and/or contains additionally different colour particles or beads from styrene polymer, which can be arranged to a sample or such a thing.

The surface layer can contain sunlight-reflecting, in particular of heat rays, thus infrared components. As reflecting materials metallic, metalloxidhaltige or mineral pigments are well-known.

The Wärmedämmplatte exhibits a Lambdawert prefers smaller 0,035, in particular within the range 0,025 to 0,029 or to 0.022.

The cross section can be quaderförmig as also trapezoidal or such a thing.