• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a sealing method, resistant to the under pressure of a fluid or a gas, implementing - the successive application of at least three layers of a composition, comprising one or more resins epoxy and one or more crosslinking agents, and -the laying of at least one specific reinforcing reinforcement.
    公开号:FR3029223A1
    申请号:FR1461792
    申请日:2014-12-02
    公开日:2016-06-03
    发明作者:Jean-Noel Louchart
    申请人:Societe Parisienne de Produits et Materiaux SPPM SARL；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a sealing method, resistant to the under pressure of a fluid or a gas, implementing: the successive application of at least three layers of a composition, comprising one or more epoxy resins and one or more crosslinking agents, and - laying of at least one specific reinforcing reinforcement. In new construction, underground spaces are more and more often converted into subway stations, car parks, cellars or dwellings with finishes and / or humidity-sensitive equipment. It is therefore imperative to produce perfectly sealed structures. These structures must also be impervious to radon or other gases in the soil that can seep through the walls. The watertightness of these buried structures is generally achieved by a waterproofing coating placed on the upper surface of the structure. This coating is indifferent to the cracking of the structure itself, since it is not secured to the structure. In other words, even if the structure is cracked, the sealing function of the coating is ensured. For example, the sealing of a structure under the pressure of a water table is currently carried out by a method implemented outside said structure. The sealing coating is thus pressed onto the structure by the pressure of the water. The surface of the structure thus sealed is not in direct contact with the ground or the surrounding water. However, in the long term, the aforementioned sealing liner becomes less resistant and cracks, causing a porosity of the surface to be sealed. Indeed, these waterproofing coatings are generally designed to be effective about twenty years, while the works they cover are built to generally last a hundred years. Water or gases can then seep through the surface and render such a work unsuitable for its original purpose. These cracks being difficult to reach, their repairs are generally delicate and unsatisfactory. The watertightness of the buried structures can also be done by a waterproofing coating placed in adherence to the intrados of the structure. None of these coatings are resistant to cracking of the structure concerned. Unlike waterproofing coatings, waterproofing coatings depend on the behavior of the structure to be treated. Indeed, when the structure is cracked, the sealing function of these internal coatings is no longer assured. Moreover, these coatings placed on the underside of the structures tend to come off when the back pressure becomes too high. The installation of a containment structure, complementary to the coating, is then necessary to avoid detachment of the coating. The intrados coating can also be completely independent of the support. It then forms a drainage for the water resulting from filtration and requires the installation of an evacuation system.
    [0002] Thus, there is a real need to develop a sealing process that is accessible and that overcomes the disadvantages mentioned above. The method must in particular provide a seal to water, radon and other gases, while resisting cracks in the structure to be treated. The method must further provide a barrier to osmotic pressure and ensure the locking of shrinkage cracks. It must also provide a vapor barrier function resistant to cracking of the surface.
    [0003] The process must be able to be applied to buildings or underground structures for which a presence of water has been detected in the surrounding terrain. This presence of water can be occasional, permanent or fluctuating. The process must also adhere to a surface saturated with water.
    [0004] Furthermore, the method must allow air to seal a work subjected to an internal pressure of a gas and thus reduce the permeability of the structure. It must also make it possible to repair the watertightness of a work previously sealed by an external process and thus make it possible to classify the unsuitable space into a space that is noble for human activity or for the storage of merchandise or material sensitive to humidity. . The Applicant has now discovered that a process involving the successive application of at least three layers of a composition, comprising one or more epoxy resins and one or more crosslinking agents, and the laying of at least one reinforcement. reinforcement, achieved the objectives set out above. The subject of the present invention is therefore a method of sealing a surface, resistant to the underpressure of a fluid or a gas, successively implementing the following steps: a) application of a first layer of a composition (A) comprising one or more epoxy resins, chosen from bisphenol A diglycidyl ether, bisphenol F diglycidyl ether and mixtures thereof, and one or more crosslinking agents, on said surface, b) application of a second layer of said composition (A) on the surface obtained in the preceding step, c) laying one or more reinforcement reinforcements with a basis weight greater than or equal to 200 gm-2 on the surface obtained in the preceding step, and ) applying at least one additional layer of said composition (A) to the surface obtained in the preceding step; the final total amount of composition (A) applied to the surface being greater than or equal to 1500 gm -2. The method of the present invention not only makes a subterranean space impermeable to water, radon, air, and other gases in the environment, but is also more resistant to backpressure and shrinkage cracks than the methods of the prior art. In addition, it adheres to saturated water surfaces satisfactorily.
    [0005] The method according to the present invention can in particular be applied to underground structures for which a presence of water has been detected in the surrounding terrain. The method of the invention has a better vapor barrier function thus allowing the adhesive bonding of any coating sensitive to vapor pressure and osmotic pressure, such as plastic floors, resin-based floors, wallpapers, the walls of doubling or plaster. This vapor barrier function resists, moreover, in a satisfactory manner to the cracking of the surface. In addition, the method according to the present invention is accessible, and therefore easily repairable. It also makes it possible to repair the tightness of structures previously sealed by an external method. Finally, the method according to the present invention makes it possible to classify an underground room in a noble local for a human activity or for the storage of goods or materials sensitive to humidity, such as a library or the storage of computer equipment. Other objects, features, aspects and advantages of the invention will emerge even more clearly on reading the description and examples which follow.
    [0006] In what follows, and unless otherwise indicated, the boundaries of a domain of values are included in this field, especially in the expressions "between" and "from ... to". Moreover, the expressions "at least one" and "at least three" used in the present description are respectively equivalent to the terms "one or more" and "three or more".
    [0007] Application of a Composition (A) (Steps a, b and d) The process according to the present invention comprises the application of at least three successive layers of a composition (A) comprising one or more epoxy resins chosen from diglycidyl ether of bisphenol A, diglycidyl ether of bisphenol F and mixtures thereof and one or more crosslinking agents on the surface, and in which the final total amount of composition (A), applied to the surface, being greater than or equal to 1500 gm -2. The process according to the invention comprises in particular: the application of a first layer of composition (A) to the said surface; the application of a second layer of composition (A) to the surface obtained in the previous step; followed by laying at least one reinforcing reinforcement on the surface, and - applying at least one additional layer of composition (A) to the surface obtained in the previous step. The epoxy resins which can be used according to the present invention are the resins resulting from the reaction between one or more bisphenol compounds, such as bisphenol A, bisphenol E, bisphenol F and their mixtures; with one or more epoxides, such as epichlorohydrin, 13-methyl epichlorohydrin and mixtures thereof. The epoxy resin (s) are chosen from bisphenol A diglycidyl ether (DGEBA), bisphenol F diglycidyl ether (DGEBF) and mixtures thereof. The crosslinking agent (s) used in the present invention are chosen from conventional agents such as aliphatic or aromatic polyamines, acid anhydrides, imidazoles, and the like. polymercaptans, polyamides, and mixtures thereof. Preferably, the crosslinking agent (s) are chosen from modified polyamides, aliphatic polyamines and their mixtures. The crosslinking agent is present in the composition (A) in an amount expressed as an equivalent number of active hydrogen atoms in the amino group (or other active hydrogen-bearing group, depending on the nature of the crosslinking used) ranging from 0.8 to 1.2, and preferably from 0.9 to 1.1 for an equivalent epoxy group present in the crosslinkable epoxy resin. The weight ratio between the total amount of the epoxy resin (s) and the total amount of the crosslinking agent (s) present in the composition (A) is preferably from 0.1 to 10, and even more preferably from 1 to 2. composition (A) may also comprise one or more additives such as reactive or non-reactive solvents, mineral fillers, rheological agents or mixtures thereof. According to a preferred embodiment of the present invention, the composition (A) results from the mixture of at least two compositions: a composition (1) comprising one or more epoxy resins, chosen from diglycidyl ether of bisphenol A, diglycidyl bisphenol ether F and mixtures thereof, and - a composition (2) comprising one or more crosslinking agents, as defined above.
    [0008] In other words, the compositions (1) and (2) are mixed homogeneously, before the composition (A) resulting from this mixture is applied to the surface. Advantageously, the total amount of composition (A) applied to the surface during step a) ranges from 200 to 500 gm -2. Similarly, the total amount of composition (A), applied to the surface during step b), preferably ranges from 600 to 1000 gm -2. And the total amount of composition (A) applied to the surface in step c) is preferably from 400 to 800 gm -2. Preferably, the final total amount of composition (A), applied to the surface, is 1500 and 2000 gm -2. By "final total amount of composition (A)" within the meaning of the present invention means the amount of composition (A) obtained after application of at least three successive layers. In other words, the "total final amount of composition (A)" corresponds to the amount of composition (A) present on the surface at the end of the process according to the present invention. When the composition (A) is obtained from the mixture of the compositions (1) and (2), it is applied to the surface for a duration of application preferably less than or equal to 60 minutes. Better yet, the duration of application is from 20 to 60 minutes. The application temperature of the composition (A) is advantageously greater than or equal to 5 ° C., and preferably this temperature is from 10 to 40 ° C. The composition (A) according to the present invention is applied manually by roller or with the aid of an application machine. Laying a reinforcing reinforcement (step c) The method according to the present invention also comprises laying one or more reinforcing reinforcements, with a grammage greater than or equal to 200 gm -2, between the application of the second and the third layer of composition (A).
    [0009] This reinforcing reinforcement notably allows a better resistance of the process in the face of cracking of the surface. The reinforcing reinforcement that can be used in the present invention consists of one or more plies, it (s) -even (s) constituted (s) of fibers laid against each other without intervals. The tablecloths are laid one on top of the other and held together by a final seam. They are not woven. Indeed, the Applicant has discovered that the woven reinforcements have local pressure points on which the crosslinked epoxy resin can break. The structure of the reinforcing reinforcement according to the present invention makes it possible to reduce the cracking of the epoxy resin. According to a preferred embodiment of the invention, the fibers are inclined relative to each other. More preferably, this inclination ranges from 30 to 60 °, and more preferably from 40 to 50 °.
    [0010] Such an assembly of the fibers makes it possible to bring good drapability to the reinforcing reinforcement. This frame being more deformable, it adapts and adheres more easily to the surface to be sealed. More particularly, the plies of the reinforcing reinforcement or reinforcement are chosen from plies based on glass fibers, carbon fibers, aramid fibers, basalt fibers, polyethylene fibers, metals, natural fibers or hybrid fibers. Preferably, the plies of the reinforcing reinforcement or reinforcement are chosen from plies based on glass fibers.
    [0011] According to another particular embodiment, the plies of the reinforcing reinforcement or reinforcement is chosen from the plies based on carbon fibers. Advantageously, the weight of the reinforcement or reinforcement ranges from 250 to 900 g.m -2.
    [0012] Drying The process according to the present invention may optionally further comprise one or more drying steps.
    [0013] In particular, the method of the invention may comprise a drying step after step a), after step c) and / or after step d), as defined above. When present, the drying steps have a duration ranging from 1 to 48 hours, and preferably from 12 to 36 hours. Furthermore, the drying temperature is from 5 to 40 ° C, and preferably from 10 to 30 ° C. According to a preferred embodiment, the sealing method of the invention successively implements the following steps: a) application of a first layer of a composition (A) comprising one or more epoxy resins, chosen from diglycidyl bisphenol A ether, bisphenol F diglycidyl ether and mixtures thereof, and one or more crosslinking agents on said surface, b) drying the surface obtained in the preceding step, c) applying a second layer of said composition (A) on the surface obtained in the preceding step, d) laying one or more reinforcing reinforcement with a grammage greater than or equal to 200 gm-2 on the surface obtained in the preceding step, e) drying the surface obtained in the preceding step, and f) applying at least one additional layer of said composition (A) to the surface obtained in the preceding step; the final total amount of said composition (A), applied to the surface, being greater than or equal to 1500 gm -2. The Applicant has discovered that a drying time greater than or equal to 24 hours makes it possible to obtain the formation of a homogeneous and resistant crosslinked epoxy resin film, thus improving the process of the invention.
    [0014] Indeed, the polymerized resin film thus obtained can deform without breaking and has an elongation at break preferably ranging from 2% to 10%.
    [0015] Treatment The method according to the present invention may optionally further comprise a first step of treating the surface to be sealed.
    [0016] In other words, according to a preferred embodiment, the surface to be sealed is pretreated prior to the application of the first layer of composition (A), as described above. As examples of treatments that can be used according to the present invention, mention may be made especially of dry or wet sanding, hydropneumatic sanding, shot peening, hydraulic pickling at 40 MPa, planing and diamond sanding. By "sanding" is meant in the sense of the present invention, a method for projecting on a concrete surface aggregates with compressed air. Preferably, the size of the aggregates ranges from 0.5 to 2 mm. For the purposes of the present invention, the term "shot blasting" is intended to mean a method of centrifugally spraying steel balls on a concrete surface, the diameters of the steel balls used being advantageously 0.7 to 2 mm.
    [0017] Preferably, the treatment is chosen from dry sanding and shot blasting. The Applicant has discovered that this step of treating the surface to be sealed thus allows better anchoring of the composition layers (A).
    [0018] According to a preferred embodiment, the sealing method of the invention successively implements the following steps: a) treatment of said surface, b) application of a first layer of a composition (A) comprising one or more epoxy resins, chosen from bisphenol A diglycidyl ether, bisphenol F diglycidyl ether and mixtures thereof, and one or more crosslinking agents, on the surface obtained in the preceding step, c) applying a second layer of said composition (A) on the surface obtained in the preceding step, d) laying one or more reinforcing reinforcement with a grammage greater than or equal to 200 gm-2 on the surface obtained in the preceding step, and e) application of at least one additional layer of said composition (A) on the surface obtained in the preceding step; the final total amount of said composition (A), applied to the surface, being greater than or equal to 1500 gm -2. According to another preferred embodiment, the sealing method of the invention successively implements the following steps: a) treatment of said surface, b) application of a first layer of a composition (A) comprising one or a plurality of epoxy resins, chosen from bisphenol A diglycidyl ether, bisphenol F diglycidyl ether and mixtures thereof, and one or more crosslinking agents, on the surface obtained in the preceding step, c) drying the surface obtained at preceding step, d) applying a second layer of said composition (A) to the surface obtained in the preceding step, e) laying one or more reinforcing reinforcements with a basis weight greater than or equal to 200 gm-2 on the surface obtained in the preceding step, f) drying the surface obtained in the preceding step, and g) applying at least one additional layer of said composition (A) to the surface obtained in the preceding step; the final total amount of said composition (A), applied to the surface, being greater than or equal to 1500 gm -2. The structures and surfaces The method according to the present invention is intended to be applied to any type of internal surface of an underground structure. In other words, the method according to the present invention is intended to be applied to the intrados of an underground structure.
    [0019] By "underground structure" within the meaning of the present invention is meant covered trenches, underground passages under road, highway and railway platforms, underground underground spaces, such as car parks, railway stations and metro stations, tunnels dug and tunnels drilled. The surfaces to be sealed with the method of the invention may be reinforced or unreinforced concrete, mortar, prestressed concrete or masonry carrying small elements such as blocks, bricks or stones.
    [0020] In particular, the method of the invention is intended to be applied to the vaults and upper slabs of tunnels or covered trenches, piers and vertical sails of covered trenches, rafts of tunnels or covered trenches. According to a preferred embodiment, the method according to the present invention is intended to confer a watertightness on a reinforced concrete surface. According to another preferred embodiment, the method according to the present invention is intended to confer a watertightness on a masonry surface. According to this embodiment, the method of the invention is associated with one or more drainage devices which must not allow water to saturate the small masonry elements. The drainage device may be of the punctual type and may consist of one or more draining half-shells embedded in the surface to be sealed. Those skilled in the art will take care to arrange the half shells in parallel and in a pitch adapted to the surface. The half-shells can be supplemented by one or more branches, arranged in stop of fish, thus making it possible to take back an infiltrating surface.
    [0021] The drainage device may be supplemented by one or more water collection and disposal systems. More preferably, the method according to the present invention is intended to confer an airtightness.
    [0022] Even better, the method according to the present invention is intended to provide a vapor barrier function. The superficial cohesion of the sealing process according to the present application is measured according to standard NF EN 1542. Preferably, the surface cohesion obtained is greater than or equal to 1 MPa. The following examples serve to illustrate the invention without being limiting in nature.
    [0023] EXAMPLE The following compositions (a) and (b) were prepared from the ingredients whose contents are indicated (percentage of active ingredient) in the tables below. bisphenol A diglycidyl ether and Bisphenol A diglycidyl ether diglycidyl ether Reactive Diluents Plasticizers and fillers Composition (b) Modified polyamide 75 Triethylene tetramine Plasticizers The compositions (a) and (b) were then homogeneously mixed. according to a ratio between the amount of composition (a) and the amount of composition (b) equal to 1.72. The composition (A) thus obtained was applied to a concrete surface. EXAMPLE 1 The following method was carried out on a concrete surface: (a) application of a first layer of composition (A) obtained above at a rate of 350 gm -2 on said concrete surface, (b) drying for 24 hours, (c) applying a second layer of composition (A) at 800 gm-2 on the surface obtained in step previous, (d) laying a glass fabric consisting of two superposed layers, comprising fibers inclined at 450 at 350 gm-2 on the surface obtained in the preceding step, (e) drying for 24 hours, ( f) applying a third layer of composition (A) at 600 gm-2 on the surface obtained in the preceding step.
    [0024] After complete crosslinking of the epoxy resin, the resistance against backpressure and concrete surface cracking was tested. Example 2: Comparative The following method was carried out on a concrete surface: (a) application of a first layer of composition (A) obtained above at a rate of 350 gm-2 on said concrete surface, (b) drying 24 hours, (c) applying a second layer of composition (A) at 800 gm-2 on the surface obtained in the previous step, (d) laying a glass fabric consisting of two layers superposed, comprising fibers inclined at 450 at 100 gm-2 on the surface obtained in the preceding step, (e) drying for 24 hours, (f) applying a third layer of composition (A) at the rate of 600 gm-2 on the surface obtained in the previous step.
    [0025] After complete crosslinking of the epoxy resin, the resistance against backpressure and concrete surface cracking was tested. Example 3: Comparative The following method was carried out on a concrete surface: (a) application of a first layer of composition (A) obtained above at a rate of 350 gm-2 on said concrete surface, (b) drying 24 hours, (c) applying a second layer of composition (A) at a rate of 100 gm-2 on the surface obtained in the previous step, (d) laying a glass fabric consisting of two layers superposed, comprising fibers inclined at 450 at 350 gm-2 on the surface obtained in the preceding step, (e) drying for 24 hours, (f) applying a third layer of composition (A) at the rate of 300 gm-2 on the surface obtained in the previous step. After complete crosslinking of the epoxy resin, the resistance against backpressure and concrete surface cracking was tested. Results Resistance to backpressure and cracking was measured at 20 ° C ± 2 ° C. Pressure was applied in stages on the sealed surfaces up to 2 MPa. After 48 hours, the resistance was evaluated visually. The results obtained for the resistance against backpressure and cracking of the sealed surfaces are given in the table below.
    [0026] EXAMPLE 1 Example 2 Example 3 (Invention) (Comparative) (Comparative) Controlling Waterproof Leakage Leakage Resistant Cracking Cracking Detachment The above results show that only the claimed process (Example 1) solves the technical problem of the invention. In fact, this method makes it possible to obtain a seal against back pressure, as well as a resistance to cracking, which the comparative methods (Examples 2 and 3) do not make it possible to obtain. When a fabric weighing less than 200 gm -2 is used (example 2), the surface thus sealed does not resist cracking and leaks.
    [0027] Similarly, when the total amount of composition (A) applied to a concrete surface is less than 1500 gm-2 (Example 3), the sealing process peels off the surface and the latter leaks.
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. A process for sealing a surface, resistant to the underpressure of a fluid or a gas, successively implementing the following steps: a) applying a first layer of a composition (A) comprising one or a plurality of epoxy resins, chosen from bisphenol A diglycidyl ether, bisphenol F diglycidyl ether and mixtures thereof, and one or more crosslinking agents, on said surface; b) applying a second layer of said composition (A) to the surface obtained in the preceding step, c) laying one or more reinforcement reinforcement with a grammage greater than or equal to 200 gm-2 on the surface obtained in the preceding step, and d) applying at least one layer additional said composition (A) on the surface obtained in the previous step; the final total amount of composition (A) applied to the surface being greater than or equal to 1500 gm -2.
    [0002]
    2. Sealing process according to any one of the preceding claims, characterized in that the weight ratio between the total amount of the epoxy resin (s) and the total amount of the crosslinking agent (s) present in the composition (A). is from 0.1 to 10, and preferably from 1 to 2.
    [0003]
    3. Sealing method according to any one of the preceding claims, characterized in that the plies of the reinforcement or reinforcement are selected from the plies based on glass fibers, carbon, aramid, basalt, polyethylene, metal, natural fibers or hybrid fibers.
    [0004]
    4. Sealing method according to any one of the preceding claims, characterized in that the plies of the reinforcement or reinforcement are selected from the plies based on glass fibers.
    [0005]
    5. Sealing method according to any one of the preceding claims, characterized in that the weight of the reinforcement or reinforcements ranges from 250 to 900 gm-2.
    [0006]
    6. Sealing method according to any one of the preceding claims, characterized in that the final total amount of composition (A), applied to the surface, is from 1500 to 2000 g.m-2.
    [0007]
    7. Sealing method according to any one of the preceding claims, characterized in that it comprises at least one drying step carried out after step a), after step c) and / or after step d ).
    [0008]
    8. The sealing method according to the preceding claim, characterized in that the drying step or steps have a duration ranging from 1 to 48 hours, and preferably from 12 to 36 hours.
    [0009]
    9. Sealing method according to any one of the preceding claims, characterized in that it further comprises a first step of surface treatment.
    [0010]
    10. A method of sealing according to any one of the preceding claims, characterized in that it is intended to be applied to the intrados of an underground structure.
    [0011]
    11. Sealing method according to any one of the preceding claims, characterized in that it is intended to be applied to one or more surfaces such as the vaults and the upper slabs of tunnels or covered trenches, pedestrians and sails vertical of covered trenches, rafts of tunnels or covered trenches.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3029223A1|2016-06-03|PRESSURE RESISTANT SEALING METHOD
    Dang et al.2014|Accelerated laboratory evaluation of surface treatments for protecting concrete bridge decks from salt scaling
    CN1963057A|2007-05-16|Use of plastic film and plastic board as construction member, mechanical device protection layer, and reinforced layer
    CN207878393U|2018-09-18|Hydraulic structure composite anti-penetrating system
    KR101719486B1|2017-03-24|Waterproof mortar composition and method for waterproofing therewith
    CN205224122U|2016-05-11|Basement waterproofing bottom plate
    KR101741798B1|2017-05-30|Waterproofing layer structure of concrete bridge deck
    CN105350491B|2017-05-31|A kind of high altitude localities dam upstream face impermeable coating and its construction method
    Ashcroft2019|Industrial polymer applications: essential chemistry and technology
    JP2005035827A|2005-02-10|Protection method of concrete structure
    EP3719227B1|2021-11-03|Sealing method comprising a step of simultaneous spraying of epoxy resin and fibers
    EP3907079A1|2021-11-10|Sealing method comprising a step for simultaneous projection of geopolymer and fibres
    FR3031534A1|2016-07-15|METHOD FOR SEALED PHONIC INSULATION
    JP4064853B2|2008-03-19|Anticorrosion / waterproof coating structure and construction method for concrete structures
    JP2020029724A|2020-02-27|Repair structure of underground concrete structure and repair method
    FR3090018A1|2020-06-19|Method for preventing the detachment of a surface coating from a wall
    CN112812666B|2022-01-11|Spray polyurea coating system containing slow-curing flexible transition layer and construction method thereof
    EP0271473B1|1991-08-28|Process for the application of a finishing coating to an outer covering of a porous support, particularly a cellular concrete facade
    CN209619218U|2019-11-12|A kind of concrete-bridge supporting member surface isolated form coating structure
    JP5956135B2|2016-07-27|Cracked seal method
    RU27850U1|2003-02-20|PIPE WITH MULTIFUNCTIONAL LAYERED COATING
    Bowen1990|The future of the past at Göreme in Turkey
    Kunieda2014|Hybrid surface protection repair system using UHP-SHCC for concrete structures–from design to application
    Zia et al.2015|Study on Effect of Polymer on Fibre Reinforced Repair Concrete
    CN114150712A|2022-03-08|Pre-paved anti-adhesion waterproof structure and construction method
    同族专利:
    公开号 | 公开日
    FR3029223B1|2017-01-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2151030A1|1971-09-01|1973-04-13|Fosroc Ag|Protection against moisture - with compsn contg epoxide resin and polyamide hardener|EP3650618A1|2018-11-07|2020-05-13|Max Perles et Cie|Wall comprising a porous medium likely to crack, in particular concrete, covered with a sealing system which comprises at least one electrically conductive primary layer, associated storage system|
    FR3090018A1|2018-12-12|2020-06-19|Societe Parisienne De Produits Et Materiaux|Method for preventing the detachment of a surface coating from a wall|
    EP3719227A1|2019-04-05|2020-10-07|Societe Parisienne de Produits et Materiaux|Sealing method comprising a step for simultaneous projection of epoxy resin and fibres|
    EP3907079A1|2020-05-07|2021-11-10|Societe Parisienne de Produits et Materiaux|Sealing method comprising a step for simultaneous projection of geopolymer and fibres|
    法律状态:
    2015-10-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-06-03| EXTE| Extension to a french territory|Extension state: PF |
    2016-06-03| PLSC| Publication of the preliminary search report|Effective date: 20160603 |
    2016-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-12-12| PLFP| Fee payment|Year of fee payment: 5 |
    2019-08-02| CL| Concession to grant licences|Name of requester: ETANDEX, FR Effective date: 20190619 |
    2019-08-30| LIMR| Limitation of claims|Effective date: 20190723 |
    2019-09-20| PLFP| Fee payment|Year of fee payment: 6 |
    2020-12-08| PLFP| Fee payment|Year of fee payment: 7 |
    2021-11-11| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1461792A|FR3029223B1|2014-12-02|2014-12-02|PRESSURE RESISTANT SEALING METHOD|FR1461792A| FR3029223B1|2014-12-02|2014-12-02|PRESSURE RESISTANT SEALING METHOD|
    [返回顶部]