FR2811663A1 - Surface finishing luminescent material for ground, wall or glazed surfaces, contains a heat curable resin and a luminescent pigment - Google Patents

Abstract

The surface finishing material comprises a heat curable resin selected from bisphenol ether type epoxy resins or polyurethane-based resins, at least one luminescent pigment, and, optionally, wood shavings, rubber granules or metal shavings. An Independent claim is also included the application of the surface finishing material (4), which involves applying an impregnation layer (3) forming a support for the surface finishing material (4), and where the impregnation layer (3) is supported by an intermediate (plaster) layer (2).

Description

LUMINESCENT MATERIAL FOR SCRAPING. POSITIONING PROCESS

OF SUCH MATERIAL

  The invention relates to the technical field of surface coverings, in particular floor coverings, walls, partitions or glazed surfaces. The invention relates more particularly to a surface coating which at the same time has a good seal and comprises at least locally

  phosphorescent and / or fluorescent zones.

  By fluorescence is meant here an emission of electromagnetic radiation, at least in the visible range, this radiation

  appearing upon excitation or after a very short time of the order of 10 8 s.

  The phosphorescence considered here is a photoluminescence at temperatures close to ambient temperature, luminescence persisting by remanence for a relatively long time after the excitation has been suppressed. By photoluminescence is meant here the emission of electromagnetic radiation at least partly in the visible range, following

absorption of photons.

  Numerous applications of luminescence are known.

  The majority of luminescence applications relate to the fields of electronics or the medical field: - electroluminescence by selective cathodic excitation of phosphors deposited on the internal surface of television screens, computers or other electroluminescent panels; - fluorescent lighting type discharge lamps, high or low pressure mercury vapor; field emission screens; plasma screens; LED diodes; formation of radiological images and X-ray intensifying screens; detection of ionizing radiation; laser pumping; - electrophotographic, photocell recording; chemiluminescence used for biological assays

  nucleic acid sequencing or immunofluorescence.

  The other applications of luminescence are essentially oriented towards security or the marking and identification of products: identification or authentication marking or protection against theft or photocopying, selective sorting of materials - marking of defects in penetrant parts; - road marking and safety marking. For this type of application, one can refer, for example, to the following documents: patent applications in France published under the numbers 2 406 265, 2 441 231, 2 450 865, 2 684 398; European patent applications published under the numbers 0 040 710, 0 525 977, 0 872 525; international patent applications published under numbers

  / 02226, 91/09253, 92/18573, 93/18237, 94/20577, 95/10663, 95/14134,

99/21937;

  - safety and protective clothing, as described in the documents FR-A-2 406 265, FR-A-2 583 960, EP-A-0 026 463, FR-A-2 384 836,

FR-A-2 514 377.

  Luminescence is sometimes used for simple decoration.

  Fluorescent or phosphorescent materials have thus been introduced into certain glues, varnishes, lacquer inks or paints (cf. documents FR-A-2 565 347, WO-A-91/05833, WO-A-92/14799, WO-A -99/38916) for applications as varied as drinking glasses (FR-A-2 539 606), umbrellas (FR-A-2 627 679), position lights (EP-A-522 785, EP -A421324), the

  condoms (WO-A-90/14058), false building stones (WO-A-

  89/09250, WO-A-98/32267, WO-A-98/35919), optical brighteners for textiles.

  The variety of applications of fluorescent or phosphorescent materials tends to make believe that their implementation is easy, which is

far from the case.

  In particular, these materials are sensitive to aging, in particular under the effect of ultraviolet radiation, their luminescence often going

declining over time.

  Furthermore, these materials are often expensive, so that their conventional applications are: - either very technical, the price of these materials then being uncritical; - either not very technical, in which case the luminescent surfaces are of limited extent, the materials employed having moreover a yield of

  weak luminescence and reduced brightness.

  The invention relates to a waterproof, phosphorescent and / or fluorescent floor covering in its mass, with a high luminescence yield, devoid of

  radionuclédes, and can be placed on a wet or dry surface.

  Other objects and advantages of the invention will become apparent during the course of the

  following description of embodiments, description which will be made in

  referring to the attached drawings, schematically, in cross section: - in FIG. 1, a method of impregnating a screed with resin; - In Figure 2, an embodiment of a thermosetting resin mortar with a woody or rubbery filler according to the invention; - In Figure 3, an embodiment of a pourable mortar coating according to the invention; - In Figure 4, an embodiment of a paint or film-forming layer according to the invention; - In Figure 5, a mode of implementation of a resin seal according to the invention. In all the embodiments shown, the base support 1 is a hydraulic binder such as concrete or the like. It is understood, however, that other types of basic support may be concerned, as will be recognized by those skilled in the art. The embodiments described and represented are not

  given only by way of nonlimiting examples.

  This base support 1 is coated with a float screed 2, in the modes

for carrying out FIGS. 1 to 4.

  On this float screed 2, an impregnation layer 3 is put in place.

  In other embodiments, not shown, the impregnation layer 3 is directly placed on the support 1, without an intermediate screed 2. The upper surface of the support is optionally treated to

  allow the attachment of this impregnation layer 3.

  This treatment can be carried out in different ways, for example by sanding or grinding, shot blasting, spraying of pressurized water, sandblasting, water sanding, bush hammering, planing or milling. Sanding or grinding can be carried out dry or with water, possibly with suction. The spraying of water under pressure can be carried out with pressures ranging from a few bars to about 1000 bars, and flow rates of the order of a few liters per minute to a few hundred liters per minute, the water possibly being heated. Mechanical preparation or chemical pickling are carried out if necessary, when the base support 1 is covered with a paint or a bitumen. When chemical pickling is used, the coating of the invention will be applied after a drying time sufficient to allow

  total evaporation of the stripper's solvents.

  On concrete support, watering 24 hours before laying will reduce the porosity s of the support and bubbling, the laying being carried out on a damp and cleaned support

excess water in the flashes.

  The conditions for preparing the basic support are defined by the following texts DTU 21, DTU p74-203 and DTU 59.3, the application of these texts and

  regulations being entirely possible during the implementation of the invention.

  The installation of the impregnation resin layer 3 can be carried out with a roller or a brush, possibly with a spray gun, in order to bind the

  surface particles. The impregnation closes the pores without forming a continuous film.

  The amount of impregnation resin to be applied depends on the structure of the support (and its absorbent capacity) and will be such that after treatment and drying the support is slightly shiny. The impregnation resin is preferably pigment-free so as not to reduce the deep penetration. The application of the impregnation resin is preferably carried out on a clean, degreased and dry floor. The application is made in thickness up to 20mm, the penetration in

  the support being between 0.5 to 2mm approximately.

  On the impregnation layer 3, a coating 4 is put in place.

  In the embodiment shown diagrammatically in FIG. 2, this coating 4 is a trowellable layer of resin mortar, comprising a resin

  thermosetting, fillers and additives, and possibly pigments.

  The thickness of the trowellable layer is of the order of 6 to 12 mm. The application is made, with a weaver and a float, on a clean, degreased and dry floor. Mortar consumption is approximately 1.8 to 2 kg per square meter per millimeter of thickness. This embodiment is suitable for applications in which

  good mechanical resistance and good chemical resistance are required.

  In an alternative embodiment, also corresponding to the diagram in FIG. 2, the coating is a trowelable mortar containing a thermosetting resin and, as binder, cellulose fillers such as wood chips or the like. This coating 4 is non-slip. It can be applied in thickness from 3 to 12mm. The application is carried out on a perfectly clean and degreased floor. This embodiment is suitable for applications in which good mechanical resistance is desired for a soft and thermally insulating floor. This embodiment is not suitable when a good

  chemical resistance is desired.

  In another alternative embodiment, the coating 4 comprises a thermosetting resin and rubber fillers. This adherent coating can be applied in thickness from 3 to 12mm. This embodiment is suitable for applications in which a soft and thermally insulating flexible floor is desired, but is not suitable when good chemical or mechanical resistance is desired. The application is carried out on clean soil

io degreased and dry.

  In the embodiment of Figure 3, the coating 4 is a flowable mortar, comprising a resin, fillers and optional pigments, in a thickness between 1 and 6 mm. Mortar consumption is around 1.8 kg per square meter per millimeter of thickness. When the resin content is high, the mortar can be self-leveling. The trowel application will be carried out for high load contents. This mode of implementation is suitable for applications in which wear by friction is to be feared,

  or when the base support 1 is rough or old but not too degraded.

  In the embodiment shown diagrammatically in FIG. 4, the coating 4 is a paint or a film-forming layer, improperly called "sealing" by certain practitioners. This embodiment allows complete closure of the

  pores of the base support 1 and the formation of a continuous and impermeable film.

  This embodiment is suitable for applications in which good

  chemical resistance is desired. The finish can be smooth or non-slip.

  The thickness of the film-forming layer is between 0.1mm and 1mm approximately.

  The application of the film-forming layer is carried out on a perfectly clean, degreased and dry floor. The formulation may contain pigments and fillers. The content of solid elements contained in the coating layer 4 may be higher than that contained in the impregnation layer 3. The film-forming layer is applied by roller, brush, spray gun, or by pouring and

  draw, this last method being reserved for the case of systems without solvents.

  Depending on the nature of the product and the support, one to four coats are applied.

  In an alternative embodiment also corresponding to the diagram in FIG. 4, the coating 4 is a paint comprising a thermosetting resin, fillers and dyes. This type of product allows the decoration and the interior and exterior protection of cement, plaster, brick, concrete or plaster substrates. The implementation is done in two fresh layers on fresh with a roller brush on primer. The substrates must be sound, free of dust and of all substances which may affect the good performance of the coating. In the embodiment of FIG. 5, a putty composed of a thermosetting resin and of fillers is applied for plugging cracks or making connection joints in construction, or even for making connection joints. between plinths, wall or floor fittings for

  sealing, expansion joint, or for clogging or decoration.

  The application can be done by pouring or by cartridge, the putty can be

  flowing or loaded so as to be thixotropic.

  We will now describe a resin composition such as can be used.

  used in the applications shown schematically in the appended figures.

  In one embodiment, the resin comprises an epoxy base

  bisphenol ether type and a cycloliphatic hardener.

  The mixture comprises for example two volumes of resin for one or

two volumes of hardener.

  In another embodiment, the resin is of the polyurethane type.

  Zinc powder is added to the resin, as well as pigments

phosphorescent or fluorescent.

  The resin does not contain radionuclides.

  In one embodiment, the luminescent product is a pigment sold by the company Canrad Hanovia Inc. of Newrak (New Jersey, United States), under the brand Lumilux (Ridel de Haen AG). This phosphorescent pigment occurs

  as a finely divided powder.

  In other embodiments, the luminescent material is chosen from the group comprising: - zinc or cadmium sulphides, - oxides of aluminum and of a metal chosen from the group comprising calcium, strontium and barium; the strontium aluminates activated with europium and / or dysprosium, at least part of the strontium atoms being replaced by an element chosen from lead, dysprosium and zinc; - rare earth oxyhalides such as, for example, lanthanum, gadolinium or mixed lanthanegadolinium oxyhalide combined with a rare earth activator, - lithium borate Li2B407, - a fluorohalide of alkaline earth metals activated with europium; - lanthanum and thallium phosphates, for example produced by thermal decomposition of gels, solution or powders comprising lanthanum, lithium and alkali metal salts and an organic precursor such as

  tri-methyl phosphate and boric acid.

  The phosphorescent and / or fluorescent effect resin can be applied in water, on wet or dry surfaces, at room temperature or at low

temperature.

  This resin can be mixed with a multitude of fillers.

  The main premises targeted are for residential, school, sports,

  hospital, parking, commercial, technical, industrial, storage.

  The surfaces which can be coated with said resin may be floors

or walls.

  Other possible applications are: - road signs; - marking in factories; - safety signs; - letters, drawings and paintings for advertising or decoration; - the internal surfaces of tanks, tanks, underground and other surfaces of

dark places.

  Depending on the type of luminescent product chosen, the colored effect will be yellow, blue, green, or red. The mixture of different luminescent pigments makes it possible to obtain

a palette of shades.

  The addition of colored fillers, sands, polymers, or grains of

  metals allows the effects to be further varied.

  The products according to the invention make it possible, depending on their method of implementation, to carry out one or more of the following functions: suppression of the formation of dust originating from concrete or mortars based on hydraulic binders; - Decrease in the porosity of the base support 1, the maintenance of which is thus facilitated; - uniform coloring of the base support 1; - protection of the support against certain chemicals; - reduction of the micro roughness of the support 1; improved abrasion resistance; - non-slip power by incorporating aggregates (quartz, slice, io corundum); - increase in the intrinsic resistance of the support; - retrofitting of the levels or slopes of the base support 1; - increased resistance to microcracking;

  - improvement of the sealing of the support.

Claims (6)

  1. Surface leveling material, characterized in that it comprises a   thermosetting resin and at least one luminescent pigment.   2. Surface leveling material according to claim 1, characterized in that the resin is chosen from the group comprising resins based on   epoxy bisphenol ether type, polyurethane based resins.   3. Material according to claim 1 or 2, characterized in that the luminescent material is chosen from the group comprising: zinc sulfides; cadmium sulfides; aluminum and calcium oxides; aluminum and strontium oxides; aluminum and barium oxides; strontium aluminates activated with europium and / or dysprosium; strontium aluminates activated with europium and / or dysprosium in which at least part of the strontium atoms is replaced by lead, dysprosium or zinc atoms; rare earth oxyhalides; lanthanum, gadolinium or mixed lanthanum-gadolinium oxyhalides combined with a rare earth activator; lithium borate Li2B407; an alkaline earth metal fluorohalide   activated with europium; lanthanum and thallium phosphates.   4. Material according to any one of claims 1 to 3, characterized   in that it further comprises charges chosen from the group comprising   wood chips, rubber grains, metal chips.   5. Method of placing a material as presented in one   any one of claims 1 to 4, characterized in that it comprises a step   for installing an impregnation layer (3), forming a support for said material of smoothing.   6. Method according to claim 5, characterized in that it further comprises a step of placing a float screed (2), forming a support for the impregnation layer (3).