When such a coating is arranged on a floor, on the other hand, for instance on a factory floor where transport trucks are in use, there is a significant risk that the coating will have to be replaced due to wear and tear. This is fairly frequently a significant problem in industrial companies.

The object of the present invention is to solve said problem and the solution is primarily intended for industrial floor surfaces. The coating, in accordance with the invention, consists of several layers, there being at least three layers. The first layer is an opaque layer, the second layer contains a phosphorescent substance and the third layer or subsequent layers are of a varnish type. It has been discovered that it is suitable to use zinc oxide as the opaque colouring agent or tinter. The second layer, intended to be a phosphorescent layer, contains a powder consisting of a product that is commercially available under the name Lumilux N5, its chemical composition being specified on the packaging of the product. Of course, a phosphorescent substance of a different kind with the same properties as said Lumilux N5 can be used. For the base material, in the case of all three layers, it is suitable to use methyl methacrylate with a hardener, which can consist of dibenzoyl-peroxide. The base materials in the three layers can have different additives.

Before its formation, each layer can be defined by masking tape and masking tape can also be arranged inside the coating between the first and second layer. All the masking tape is removed before the third and subsequent layers are applied. For the base material, it has been discovered that it is suitable to use the commercially available product Acrydur GRB 1 and Acrydur M14, which utilize a hardener called Lucidol CH50X and a tinter consisting of zinc oxide, for instance. Of course, substances with equivalent properties and with different mixing

proportions can be substituted for all these commercially available products, provided that the desired coating is obtained. The commercially available product Acrydur N1, which likewise utilizes the hardener Lucidol CH50X, is used for the second layer. The third layer consists of the commercially available product Acrydur L2 and the hardener Lucidol CH50X. Other equifinal substances can similarly be substituted for the third layer.

It has been discovered that a coating with the above-mentioned three layers arranged on an industrial floor surface has a durability exceeding that of known marketed coatings. A further advantage with the present coating is its short curing time. Pedestrian traffic is permitted after 30 minutes. Truck traffic can take place in two hours'time.

It has been discovered that the coating described in the preceding is eminently suitable for phosphorescent escape route lines on an industrial floor surface. The procedure for defining such lines involves first arranging alignment strings that are parallel to each other and spaced from each other on the floors and, inside these strings, arranging masking tape in the form of strips, where one of the edges is immediately adjacent to a co- operating string. When this has been done, the intervening space between the two strips of masking tape is coated with a primer containing the products Acrydur GRB 1, Acrydur M14, Lucidol CH50X and zinc oxide or some other tinter. When the first layer has dried, strips of masking tape are placed in angular shapes along the created coating and arranged to be spaced from each other. The strips of masking tape have the character of arrows and are suitably placed with the aid of a template on the first painted layer so that all the arrows are equidistantly arranged one after the other. The arrows having been arranged, the first layer of arrows is coated with a second layer consisting of the product Acrydur N1, the hardener Lucidol CH50X and Lumilux N5. When the second layer has dried, all the strings and strips of masking tape are removed and, thereafter, one or several layers of Acrydur L2 with the hardener Lucidol CH50X is arranged on the two layers. The additional layers must dry one by one. An advantage associated with a layered laminate is that it blends in with the surrounding flooring to a greater or lesser degree.

The properties of the present invention appear from the appended claims.

An illustrative embodiment entailing the phosphorescent escape route line will be further described in connection with the 8 accompanying drawings, where Figure 1 shows an alignment string being arranged on an industrial floor; Figure 2 shows a strip of masking tape being arranged on an industrial floor; Figure 3 illustrates a primer being applied between the two strips of masking tape; Figure 4 shows how direction arrows are arranged on an escape route line on the first coating layer, using a template to achieve the correct distance between the direction arrows; Figure 5 shows a phosphorescent substance being applied to the escape route line; Figure 6 shows the masking tape, alignment strings and direction arrows being removed; Figure 7 shows the application of a third layer, on which further layers can be applied in like manner; and Figure 8 shows a cross-section of a coating with its various layers.

An industrial floor 1 is shown in Figure 1 and an alignment string 2 is placed on this industrial floor. Two persons 3 and 4 are then shown laying down a second alignment string 5. Before the alignment strings 2 and 5 are applied, the floor 1 has been cleaned properly, for instance by vacuum cleaning. If necessary, grease is removed from the floor. Surface grinding is not necessary. The alignment strings are suitably white. The strings constitute a defining outline for an escape route line. Inside the two lines 2 and 5, two strips of masking tape 6 and 7 are arranged with one edge of each strip adjoining said alignment strings. When the escape route line has been outlined, it is coated, using a brush 8, with a mixture of Acrydur GRB 1 and Acrydur M14, zinc oxide and the hardener Lucidol CH50X.

The first layer having dried, arrows 11 of tape are applied along the escape route line, using a template 12, allowing the distance between the

arrows to be kept constant. When the arrows have been placed, a layer containing Acrydur N1, a phosphorescent powder Lumilux N5 and a hardener Lucidol CH50X is applied. When the second layer 14 has dried, all the masking tape and all the alignment strings are removed. When this has been done, the escape route line thus created is coated with a third layer 15 consisting of Acrydur L2 and a hardener CH50X. When the third layer has dried, further layers of the same kind can be applied, if necessary.

The various Acrydur products have the following composition: Acrydur N 1 Composition: Conc. (percentage by weight) methyl methacrylate 25.00-50.00 2-ethylhexyl acrylate 25.00-50.00 2-2- (2-ethoxyethoxy) ethoxyethyl methacrylate 2.50-10.00 2,2'-ethylene dioxide diethylene dimethacrylate 1.00-2. 50 1.1- (p-tolylimine) dipropane-2-o1 0.10-1.00 Acrydur L 2 Composition: Conc. (percentage by weight) methyl methacrylate 50.00-80.00 2,2'-ethylene dioxide diethylene dimethacrylate 5.00-20.00 1.1- (p-tolylimine) dipropane-2-o1 0.10-1.00 Acrydur M 14 Composition: Conc. (percentage by weight) methyl methacrylate 50.00-99.99 2,2'-ethylene dioxide diethylene dimethacrylate 2.50-10.00 1.1- (p-tolylimine) dipropane-2-o1 0.10-1.00 N, N-dimethyl-p-toluidine 0.10-1.00

Acrydur GRB 1 Composition: Conc. (percentage by weight) methyl methacrylate 50.00-70.00 2,2'-ethylene dioxide diethylene dimethacrylate 2.50-12.50 1.1- (p-tolylimine) dipropane-2-o1 0.10-0.95 N, N-dimethyl-p-toluidine 0.10-0.95 It has been discovered that the following mixing proportions are suitable: Primer Acrydur GRB 1 1 litre Acrydur M 14 1 decilitre Tinter powder zinc white 9 decilitres Lucidol CH 50 X approx. 0.3 decilitres at 20° Consumption of materials: 1 batch is sufficient for approx. 50 Ipm of line, 100 m wide.

Paint Acrydur N 1 1 litre Phosphorescent powder Lumilux 5 decilitres Lucidol CH 50 X approx. 0.3 decilitres at 20° Consumption of materials: 1 batch is sufficient for approx. 30 Ipm of line, 100 m wide.

Varnish Acrydur L 2 1 litre Lucidol CH 50 X approx. 0.15 decilitres at 20° Consumption of materials: 1 batch is sufficient for approx. 50 Ipm of line, 100 m wide.

It should be obvious that substances with similar properties can be substituted for the chosen substances and that the concentration of the substances can be varied within limits that provide the same characteristics as the last-mentioned mixing proportions.

The present invention has thus succeeded in providing a coating for an industrial floor which can preferably consist of an escape route line, where the constituent ingredients have been chosen, with respect to their composition and nature, in such a way that the durability of the coating, as compared with known coatings, has been increased.