Pre-paved anti-sticking non-sand surface waterproof roll surface coating paint, preparation method and waterproof roll

Abstract

The invention belongs to the field of waterproof coiled materials, and discloses a pre-laid anti-sticking non-sand-surface waterproof coiled material surface coating paint, a preparation method and a waterproof coiled material. The coating is prepared from the following components: anion resin emulsified asphalt, aziridine, UV curing waterborne polyurethane acrylate, a photoinitiator, nano composite ceramic microbeads, styrene-butadiene latex, an auxiliary agent and waterborne pigment color paste, the auxiliary agent comprises the following components: a coalescing agent, a pH regulator, a silane coupling agent, a defoaming agent and a thickening agent. The non-sand-surface pre-paved anti-sticking waterproof coiled material can be prepared by spraying the coating on the pre-paved anti-sticking waterproof coiled material, and the non-sand-surface pre-paved anti-sticking waterproof coiled material has the characteristics of anti-sticking surface, high hardness, high peel strength with post-poured concrete, long-term water resistance and the like, and solves the problem that sand grains need to be additionally treated when short edges of the sand-surface pre-paved anti-sticking waterproof coiled material are lapped.

Description

Technical Field

[0001] This invention belongs to the field of waterproof membranes, and more specifically, relates to a surface coating for a pre-laid, reverse-adhesive, non-sand-finish waterproof membrane, its preparation method, and the waterproof membrane itself. Background Technology

[0002] Pre-laid reverse-adhesive waterproof membrane is a modified bitumen waterproof membrane that is laid with the adhesive side facing upwards and directly bonded to the subsequently poured concrete. It offers advantages such as saving construction time, fast construction speed, and immunity to adverse factors like damp substrates. Traditional pre-laid reverse-adhesive waterproof membranes feature a sanded surface design to prevent adhesion, while also exhibiting high peel strength and surface hardness against the poured concrete. However, when overlapping the short sides of the membrane, the sand often needs to be removed to ensure full adhesion at the overlap. Furthermore, sanded membranes are prone to shedding sand, are too heavy, difficult to handle, and offer limited options for coating appearance.

[0003] The existing non-sand-surface pre-laid reverse-adhesive waterproof membrane has low surface coating hardness, which makes it easy to be punctured and damaged by steel bars during the subsequent concrete pouring construction, causing local water seepage problems. Therefore, a protective layer needs to be installed.

[0004] Therefore, there is an urgent need to propose a new coating material for pre-laid, reverse-adhesive, non-sand-surface waterproof membranes. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a surface coating for pre-laid, reverse-adhesive, non-sand-surface waterproof membrane, its preparation method, and the resulting waterproof membrane. Spraying the coating of this invention onto a pre-laid, reverse-adhesive waterproof membrane produces a non-sand-surface pre-laid, reverse-adhesive waterproof membrane, which features surface non-stick properties, high hardness, high peel strength to subsequently poured concrete, and long-term water resistance. This solves the problem of requiring special treatment of sand particles at the short-side overlap of sand-surface pre-laid, reverse-adhesive waterproof membranes.

[0006] To achieve the above objectives, a first aspect of the present invention provides a surface coating for pre-laid, reverse-adhesive, non-sand-textured waterproof membrane, the coating comprising the following components: Anionic resin emulsified asphalt, aziridine, UV-curable waterborne polyurethane acrylate, photoinitiator, nanocomposite ceramic microspheres, styrene-butadiene latex, additives and waterborne pigment pastes; The additives include the following components: film-forming aids, pH adjusters, silane coupling agents, defoamers, and thickeners.

[0007] According to the present invention, preferably, the coating comprises the following components in parts by weight: 30-75 parts of anionic resin emulsified asphalt, 0.5-1 parts of aziridine, 10-20 parts of UV-curable waterborne polyurethane acrylate, 0.5-1 parts of photoinitiator, 10-20 parts of nanocomposite ceramic microspheres, 10-20 parts of styrene-butadiene latex, 0.9-5 parts of additives, and 1-5 parts of waterborne pigment paste.

[0008] This invention employs the pre-addition of aziridine to the coating. During the production process, a cross-linking reaction occurs upon heating, enabling the coating to dry quickly (by accelerating the drying rate of the coating through a chemical reaction). The specific mechanism is as follows: Aziridine can undergo ring-opening and cross-linking reactions with functional groups such as carboxyl and hydroxyl groups (the UV-cured waterborne polyurethane acrylate in the coating contains hydroxyl and carboxyl groups), and exothermicly accelerates water evaporation, thus achieving rapid coating drying. Because aziridine requires heating (above 80°C) or acidic conditions to catalyze the cross-linking reaction, it can be stably stored at room temperature after being pre-added to the coating based on anion exchange resin emulsified asphalt. When the coating is sprayed onto a roll material at a temperature of 120°C or higher, a cross-linking reaction occurs, achieving rapid coating drying. This prevents the coating from sticking to the rollers during production, allowing for one-time spraying and forming. Simultaneously, after the cross-linking reaction, the coating molecules form a cross-linked macromolecular structure, significantly enhancing the coating strength and high and low temperature performance.

[0009] In this invention, the styrene-butadiene latex, as a modified emulsion of anion exchange resin-emulsified asphalt, can improve the low-temperature flexibility of the coating film and increase the elongation at break of the coating.

[0010] The water-based pigment pastes of the present invention are incorporated into coatings to formulate different colors. The water-based pigment pastes include, but are not limited to, iron oxide red, carbon black, and ultramarine blue.

[0011] According to the present invention, preferably, the additive comprises the following components in parts by weight: 0.1-1 parts of film-forming aid, 0.1-1 parts of pH adjuster, 0.1-0.5 parts of silane coupling agent, 0.1-0.5 parts of defoamer, and 0.5-2.0 parts of thickener.

[0012] The defoamer of this invention is used to reduce the surface tension of UV-cured waterborne polyurethane acrylate emulsions and prevent foam formation.

[0013] The film-forming aid of the present invention can dissolve and swell polymer particles in UV-curable waterborne polyurethane acrylate emulsion, enabling the polymer particles to undergo plastic flow and elastic deformation to aggregate into a film at lower temperatures as water evaporates. However, the film can evaporate and escape within a short time after film formation without affecting the glass transition temperature of the coating film, and the coating film does not become tacky at high temperatures.

[0014] The pH adjuster of this invention is used to adjust the pH value of coatings.

[0015] The thickener of this invention is used to increase the viscosity of coating systems and increase the storage stability of coatings.

[0016] The silane coupling agent of the present invention is used to improve the adhesion and peeling of the coating to the post-poured concrete and to provide a certain degree of water resistance.

[0017] According to the present invention, preferably, the particle size of the nanocomposite ceramic microspheres is 5500-6500 mesh. The present invention uses nanocomposite ceramic microspheres to replace traditional fillers as coating fillers, enhancing the hardness, wear resistance, and water resistance of the coating formed by spraying the coating of the present invention. Simultaneously, it makes the surface of the coating less prone to moisture absorption and sticking, resulting in a smoother feel. The specific mechanism is as follows: The present invention uses 6000 mesh nanocomposite ceramic microspheres as fillers. Compared with fillers used in traditional water-based coatings, nanocomposite ceramic microspheres can significantly improve the surface hardness of the coating, resisting the reinforcement binding of post-poured concrete and protecting the coating from damage. Furthermore, for long-term underwater environments in pre-laid waterproofing projects, nanocomposite ceramic microspheres, as hydrophilic fillers that are also easily dispersed in water, have a lower water absorption rate compared to fillers used in traditional water-based coatings, giving the coating high water resistance.

[0018] According to the present invention, preferably, the raw materials of the anionic resin emulsified asphalt include the following components in parts by weight: 15-30 parts water, 0.5-2.5 parts anionic emulsifier, 0.1-0.5 parts stabilizer, 0.1-0.5 parts sodium hydroxide, 10-20 parts C5 petroleum resin, 8-15 parts naphthenic oil, 1-5 parts aromatic oil, and 1-5 parts maleic anhydride grafted PP wax.

[0019] According to the present invention, preferably, the anionic emulsifier is at least one selected from sodium dodecyl sulfonate, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, and sodium dodecyl polyoxyethylene sulfate.

[0020] According to the present invention, preferably, the preparation method of the anion exchange resin emulsified asphalt includes the following steps: (1) Mix water, anionic emulsifier and stabilizer, heat and stir, and adjust the pH value with sodium hydroxide to obtain soap solution; (2) Mix and stir naphthenic oil, aromatic oil and C5 petroleum resin melted to a fluid state to obtain a stirring system; mix and stir maleic anhydride grafted PP wax with the stirring system to obtain resin asphalt; (3) The resin asphalt is mixed with soap solution and reacted, and then cooled to obtain the anionic resin emulsified asphalt.

[0021] In this invention, the resin asphalt is made primarily from C5 petroleum resin, naphthenic oil, and aromatic oil, supplemented with maleic anhydride-grafted PP wax. Its properties are similar to ordinary petroleum asphalt, but unlike ordinary petroleum asphalt, resin asphalt exhibits strong adhesion and extremely high initial tack to various substrates such as concrete and asphalt rolls. It also possesses high surface hardness and high-temperature non-stick properties. The anionic resin emulsified asphalt of this invention is obtained by emulsifying resin asphalt and has the characteristic of being sprayable at room temperature, facilitating one-time spraying during roll production.

[0022] In this invention, water is used as a dispersion medium to produce anion exchange resin emulsified asphalt; The anionic emulsifier of the present invention is an aid for emulsifying resin asphalt; The stabilizer of the present invention is used to improve the storage stability of anionic resin emulsified asphalt as a coating base material; The sodium hydroxide of this invention is used to adjust the pH value of anion exchange resin emulsified asphalt; The C5 petroleum resin of this invention is used as the base material for resin asphalt to produce anionic resin emulsified asphalt, which can improve the initial adhesion to post-cast concrete and the peel strength to asphalt rolls. The naphthenic oil of this invention acts as a plasticizer, which can increase the antioxidant and weather-resistant properties of resin asphalt. The aromatic oil of the present invention has a plasticizing effect, which can reduce the colloidal instability index of resin asphalt and help resin asphalt to be more easily emulsified; The maleic anhydride-grafted PP wax of the present invention can reduce the viscosity of resin asphalt, increase the creep stiffness modulus of resin asphalt, improve the compatibility and dispersion of resin asphalt in the aqueous phase, help resin asphalt emulsify better, and improve the high-temperature non-stickiness of the coating of the present invention after drying.

[0023] According to the present invention, preferably, in step (1): Raise the temperature to 50-60℃; The pH value of the soap solution is 10-12.

[0024] According to the present invention, preferably, in step (2): The C5 petroleum resin is heated to a flowable state at a temperature of 120-150℃. The maleic anhydride-grafted PP wax and the stirring system are mixed at 150-160°C.

[0025] According to the present invention, preferably, in step (3): The resin asphalt and soap solution are mixed and reacted at 130-160℃; cooling is performed to room temperature.

[0026] The second aspect of the present invention provides a method for preparing the surface coating of the pre-laid reverse-adhesive non-sand-surface waterproof membrane, the method comprising: mixing and stirring the anion exchange resin emulsified asphalt, film-forming aid, pH adjuster, photoinitiator, aziridine, UV-curable waterborne polyurethane acrylate, nano-composite ceramic microspheres, styrene-butadiene latex, silane coupling agent, waterborne pigment paste, defoamer and thickener to obtain the surface coating of the pre-laid reverse-adhesive non-sand-surface waterproof membrane.

[0027] In this invention, as a preferred embodiment, the method for preparing the surface coating of the pre-laid reverse-adhesive non-sand-finish waterproof membrane includes: 1. Stir the anion exchange resin emulsified asphalt at room temperature (25℃) and 400-600 r / min; add film-forming aid, pH adjuster, photoinitiator, and aziridine to the stirred anion exchange resin emulsified asphalt, control the stirring speed at 400-600 r / min, and stir for 5 min to obtain the first mixture; 2. Add UV-curable waterborne polyurethane acrylate to the first mixture, control the stirring speed at 400-600 r / min, stir for 15 min, and obtain the second mixture; 3. While maintaining the stirring speed, add nano-composite ceramic microspheres to the second mixture and stir for 15 minutes to obtain the third mixture; then add styrene-butadiene latex to the third mixture, control the stirring speed at 300-500 r / min, and stir for 5 minutes to obtain the fourth mixture; 4. Add silane coupling agent to the fourth mixture, control the stirring speed to 300-500 r / min, stir for 5 min, and obtain the fifth mixture; 5. Add water-based pigment paste to the fifth mixture, control the stirring speed at 400-600 r / min, stir for 5 min, and obtain the sixth mixture; 6. Add defoamer to the sixth mixture, control the stirring speed at 400-600 r / min, stir for 5 min, and obtain the seventh mixture; 7. Add thickener to the seventh mixture, control the stirring speed to 800-1000 r / min, stir for 15 min, and obtain the surface coating of the pre-laid reverse adhesive non-sanded waterproof membrane.

[0028] The third aspect of the present invention provides a pre-laid reverse-adhesive non-sand-surface waterproof membrane, the waterproof membrane comprising, from top to bottom, a surface coating layer, an upper cover layer, a polyester base layer, a lower cover layer and a lower surface film layer; The surface coating is an adhesive layer for the post-poured concrete, and the material of the surface coating is the surface coating coating of the pre-laid reverse-adhesive non-sand-surface waterproof membrane.

[0029] According to the present invention, preferably, the thickness of the surface coating is 0.15-0.25 mm.

[0030] According to the present invention, preferably, the method for preparing the surface coating includes the following steps: The surface coating of the pre-laid reverse-adhesive non-sand-finish waterproof membrane is sprayed onto the upper surface of the top coating layer, and then UV light is used to irradiate the coating on the upper surface of the top coating layer to obtain the surface coating layer. When spraying the pre-applied reverse-adhesive non-sand-finish waterproof membrane surface coating, the temperature of the upper surface of the top coating layer is 150-180℃.

[0031] In this invention, the preparation method of the pre-laid reverse-adhesive non-sand-surface waterproof membrane can refer to the conventional membrane production steps known to those skilled in the art. As a preferred embodiment, the preparation method of the pre-laid reverse-adhesive non-sand-surface waterproof membrane includes the following steps: S1: A 1.1mm thick long-fiber high-toughness polyester base layer is obtained by pre-impregnating it with oil. S2: Apply the top coating material and the bottom coating material to the upper and lower surfaces of the polyester base layer respectively to obtain the top coating material layer and the bottom coating material layer, and keep the temperature of the top coating material layer at 150-180℃; the top coating material and the bottom coating material are coating materials known in the art that are suitable for preparing pre-laid reverse-adhesive waterproof membranes. S3: The pre-laid reverse-adhesive non-sand-finish waterproof membrane surface coating is sprayed onto the upper surface of the topcoat layer at a temperature of 150-180℃ (spraying amount is 0.2kg / m; the coating of the present invention can quickly achieve the first stage of curing and film formation under the influence of high temperature and aziridine). Then, the coating on the upper surface of the topcoat layer is irradiated with UV light (UV high-pressure mercury lamp irradiation) to initiate the second stage of UV curing and film formation, thus obtaining the surface coating. S4: The lower surface film layer is applied to the lower surface of the lower coating layer after it has cooled to room temperature; no other film is applied to the upper surface of the top coating layer. The membrane is then compacted by a pressure roller and embossed and cut to produce the pre-laid reverse adhesive non-sanded waterproof membrane.

[0032] According to the present invention, preferably, the amount of the pre-laid reverse-adhesive non-sand-finish waterproof membrane surface coating sprayed onto the upper surface of the overcoat layer is 0.15-0.25 kg / m. 2 .

[0033] According to the present invention, preferably, the intensity of UV light irradiation is 300-600 mW / cm². 2 .

[0034] This invention utilizes UV-curable waterborne polyurethane acrylate to enhance the hardness, water resistance, and weather resistance of the coating formed by spraying the paint. The specific mechanism is as follows: This invention uses UV-curable waterborne polyurethane acrylate as the main film-forming substance, pre-mixes a photoinitiator in the paint, and installs UV-irradiated mercury lamps on the production line to instantly cure the film under UV light. The hardness of the coating is increased to D80, which can resist the damage caused by steel bar binding marks and punctures when pouring concrete after pre-laying and reverse bonding construction.

[0035] In the photoinitiator pre-doped coating of the present invention, when the coating is exposed to UV irradiation, it is used to initiate the UV curing reaction of UV-cured waterborne polyurethane acrylate to form a film.

[0036] The beneficial effects of the technical solution of the present invention are as follows: This invention provides a pre-applied, non-sand-resistant waterproof membrane surface coating. The invention uses anionic resin emulsified asphalt as the base material and adds various raw materials such as UV-curable waterborne polyurethane acrylate, styrene-butadiene latex, fast-drying crosslinking agent (aziridine), and nano-level high-hardness wear-resistant filler (nano-composite ceramic microspheres) to obtain a fast-drying, non-stick coating. This invention sprays a quick-drying, non-stick coating onto a pre-laid, reverse-adhesive waterproof membrane, replacing the traditional sand-surfaced surface of pre-laid, reverse-adhesive waterproof membrane. This allows for the creation of a non-sand-surfaced pre-laid, reverse-adhesive waterproof membrane. The coating formed by this invention has the characteristics of surface non-stick (non-sticky when unrolled at high temperatures), high hardness, high peel strength to the subsequently poured concrete, long-term water resistance, and no sand shedding. It meets the GB / T23457-2017 standard for pre-laid waterproof membranes. This invention solves the problem of requiring special treatment of sand particles when the short side overlaps of sand-surfaced pre-laid, reverse-adhesive waterproof membranes (i.e., no special treatment of sand particles is required when the short side overlaps of the membrane, resulting in faster construction efficiency). At the same time, it also solves the problem of low surface hardness of existing non-sand-surfaced pre-laid, reverse-adhesive waterproof membranes, which are easily damaged by steel bars during the subsequent concrete construction, causing localized water seepage. No protective layer is required.

[0037] The coating formed by the quick-drying non-stick coating of the present invention is thin. Therefore, the non-sand-surface pre-laid reverse-adhesive waterproof membrane made by the quick-drying non-stick coating of the present invention is thinner than the sand-surface pre-laid reverse-adhesive waterproof membrane. The membrane is lightweight and easy to handle. At the same time, the coating appearance can be customized in any color, giving the membrane a bright and colorful appearance.

[0038] Other features and advantages of the present invention will be described in detail in the following detailed description section. Detailed Implementation

[0039] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0040] In the following embodiments and comparative examples: The stabilizer is hydroxyethyl cellulose, purchased from Dow QP100; Sodium hydroxide was of analytical grade. The C5 petroleum resin was purchased from Ganges C5 petroleum resin. The naphthenic oil was purchased from Wantai Chemical 4010; Aromatic oil was purchased from Shanghai Mingzhi, and rubber oil MZ-1 was also used. Maleic anhydride grafted PP wax was purchased from Honeywell A-C597P; Aziridine was purchased from Shanghai Youen Chemical SAC-100. The UV-curable waterborne polyurethane acrylate was purchased from Seadon SEAPUR 33G31; The photoinitiator was purchased from Rycure 503; The nanocomposite ceramic microspheres were purchased from Huijing Active Composite Ceramic Microspheres (6000 mesh). Styrene-butadiene latex was purchased from Haifang SBR1502; The film-forming aid is 12-ol ester, CAS: 25265-77-4; The pH adjuster was purchased from Dow pH adjuster AMP-95; The silane coupling agent was purchased from KH550; The defoamer was purchased from Dow AFE-1410, which is a silicone defoamer with polydimethylsiloxane as the main component. The thickener selected was ACRYSOLTMTT-935, which is a hydrophobically modified alkali-soluble emulsion thickener.

[0041] Example 1

[0042] This embodiment provides a coating for a pre-laid, reverse-adhesive, non-sand-surface waterproof membrane surface.

[0043] The coating comprises the following components by weight: 45 parts anionic resin emulsified asphalt, 1 part aziridine, 12 parts UV-curable waterborne polyurethane acrylate, 0.6 parts photoinitiator, 14 parts nano-composite ceramic microspheres, 16 parts styrene-butadiene latex, 1.7 parts additives, and 2 parts carbon black paste. The additives comprise the following components in parts by weight: 0.4 parts film-forming aid, 0.1 parts pH adjuster, 0.2 parts silane coupling agent, 0.2 parts defoamer, and 0.8 parts thickener; The raw materials for the anion exchange resin emulsified asphalt include the following components by weight: 20 parts deionized water, 2 parts sodium dodecyl sulfonate anion emulsifier, 0.4 parts stabilizer, 0.3 parts sodium hydroxide, 15 parts C5 petroleum resin, 10 parts naphthenic oil, 2 parts aromatic oil, and 3 parts maleic anhydride grafted PP wax.

[0044] The preparation method of the above-mentioned pre-laid reverse-adhesive non-sanded surface waterproof membrane surface coating includes: 1. Preparation of the anion exchange resin emulsified asphalt: (1) Mix water, anionic emulsifier and stabilizer, heat to 55°C, stir for 10 min, and then adjust the pH value with sodium hydroxide to obtain soap solution (pH value is 11). (2) Heat the C5 petroleum resin to a fluid state at a heating temperature of 130℃; mix and stir the naphthenic oil, aromatic oil and the C5 petroleum resin to a fluid state for 10 min to obtain a stirring system; raise the temperature and mix and stir the maleic anhydride grafted PP wax and the stirring system at 155℃ for 10 min to obtain resin asphalt. (3) The temperature of the resin asphalt is maintained at 145°C, and it is mixed and reacted with soap solution. After cooling to room temperature of 25°C, the anionic resin emulsified asphalt is obtained.

[0045] 2. Stir the anion exchange resin emulsified asphalt at room temperature (25℃) and 500 r / min; add film-forming aid, pH adjuster, photoinitiator, and aziridine to the stirred anion exchange resin emulsified asphalt, control the stirring speed at 500 r / min, and stir for 5 min to obtain the first mixture; 3. Add UV-curable waterborne polyurethane acrylate to the first mixture, control the stirring speed at 500 r / min, and stir for 15 min to obtain the second mixture; 4. While maintaining the stirring speed, add nano-composite ceramic microspheres to the second mixture and stir for 15 minutes to obtain the third mixture; then add styrene-butadiene latex to the third mixture, control the stirring speed at 400 r / min, and stir for 5 minutes to obtain the fourth mixture; 5. Add silane coupling agent to the fourth mixture, control the stirring speed at 400 r / min, stir for 5 min, and obtain the fifth mixture; 6. Add water-based pigment paste to the fifth mixture, control the stirring speed at 500 r / min, stir for 5 min, and obtain the sixth mixture; 7. Add defoamer to the sixth mixture, control the stirring speed at 500 r / min, stir for 5 min, and obtain the seventh mixture; 8. Add thickener to the seventh mixture, control the stirring speed to 900 r / min, stir for 15 min, and obtain the surface coating of the pre-laid reverse adhesive non-sanded waterproof membrane.

[0046] This embodiment also provides a pre-laid, reverse-adhesive, non-sand-surface waterproof membrane. The waterproof membrane includes, from top to bottom, a surface coating layer, an upper cover layer, a polyester base layer, a lower cover layer, and a lower surface film layer. The surface coating layer is an adhesive layer for post-poured concrete, and the material of the surface coating layer is the surface coating paint of the pre-laid, reverse-adhesive, non-sand-surface waterproof membrane of this embodiment. The thickness of the surface coating layer is 0.2 mm. The preparation method of the pre-laid, reverse-adhesive, non-sand-surface waterproof membrane includes the following steps: S1: A 1.1mm thick long-fiber high-toughness polyester base layer is obtained by pre-impregnating it with oil. S2: Apply the top and bottom coatings to the upper and lower surfaces of the polyester base layer respectively to obtain the top and bottom coating layers, and maintain the temperature of the top coating layer at 120°C; the material of the top and bottom coatings is SBS modified bitumen coating material. S3: Spray the pre-laid, reverse-adhesive, non-sand-textured waterproof membrane surface coating onto the upper surface of the topcoat layer at a temperature of 120℃ (spraying amount: 0.2 kg / m²). 2 The coating of this invention can rapidly achieve the first stage of curing and film formation under high temperature and the influence of aziridine, and then be irradiated with UV light (UV high-pressure mercury lamp irradiation, light intensity of 300-600mW / cm). 2 The coating on the upper surface of the top coating layer is subjected to a second stage of UV curing to form a film, resulting in the surface coating layer with a thickness of 0.2 mm. S4: The lower surface film layer is applied to the lower surface of the lower coating layer after it has cooled to room temperature; no other film is applied to the upper surface of the top coating layer. The membrane is then compacted by a pressure roller and embossed and cut to produce the pre-laid reverse adhesive non-sanded waterproof membrane.

[0047] Example 2

[0048] This embodiment provides a pre-applied, reverse-adhesive, non-sand-finish waterproof membrane surface coating. The only difference between this embodiment and Embodiment 1 is: The coating comprises the following components by weight: 45 parts anionic resin emulsified asphalt, 1 part aziridine, 11 parts UV-curable waterborne polyurethane acrylate, 0.6 parts photoinitiator, 16 parts nano-composite ceramic microspheres, 12 parts styrene-butadiene latex, 1.8 parts additives, and 3 parts iron oxide red paste. The additives comprise the following components in parts by weight: 0.3 parts film-forming aid, 0.1 parts pH adjuster, 0.4 parts silane coupling agent, 0.2 parts defoamer, and 0.8 parts thickener; The raw materials for the anion exchange resin emulsified asphalt include the following components by weight: 20 parts deionized water, 2 parts sodium dodecyl sulfonate anion emulsifier, 0.3 parts stabilizer, 0.3 parts sodium hydroxide, 17 parts C5 petroleum resin, 9 parts naphthenic oil, 3 parts aromatic oil, and 3 parts maleic anhydride grafted PP wax.

[0049] Example 3

[0050] This embodiment provides a pre-applied, reverse-adhesive, non-sand-finish waterproof membrane surface coating. The only difference between this embodiment and Embodiment 1 is: The coating comprises the following components by weight: 45 parts anionic resin emulsified asphalt, 1 part aziridine, 14 parts UV-curable waterborne polyurethane acrylate, 0.7 parts photoinitiator, 15.8 parts nano-composite ceramic microspheres, 16 parts styrene-butadiene latex, 2.3 parts additives, and 3.5 parts ultramarine blue paste. The additives comprise the following components in parts by weight: 0.4 parts film-forming aid, 0.1 parts pH adjuster, 0.6 parts silane coupling agent, 0.2 parts defoamer, and 1.0 part thickener; The raw materials for the anion exchange resin emulsified asphalt include the following components by weight: 17 parts deionized water, 2 parts sodium dodecyl sulfonate anion emulsifier, 0.4 parts stabilizer, 0.3 parts sodium hydroxide, 10 parts C5 petroleum resin, 12 parts naphthenic oil, 1 part aromatic oil, and 4 parts maleic anhydride grafted PP wax.

[0051] Comparative Example 1

[0052] This comparative example provides a pre-applied, reverse-adhesive, non-sand-surface waterproof membrane surface coating. The coating comprises the following components by weight: 26 parts of Sinopec Jinshan Petrochemical 70#A asphalt, 20 parts of deionized water, 0.1 parts of sodium hydroxide, 0.2 parts of anionic emulsifier sodium dodecyl polyoxyethylene ether sulfate, 0.2 parts of aqueous ammonium salt dispersant SN5027, 0.2 parts of pH adjuster, 30 parts of Dow DC-436 styrene-acrylic emulsion, 20 parts of heavy calcium carbonate, and 1.5 parts of thickener ASE60.

[0053] The preparation method of the surface coating of the pre-laid reverse-adhesive non-sanded waterproof membrane in this comparative example includes: Sinopec Jinshan Petrochemical 70#A asphalt was heated to 135℃ to obtain preheated asphalt; An anionic emulsifier and sodium hydroxide are added to deionized water and heated to 65°C to prepare soap solution; Preheated asphalt and soap solution are simultaneously passed through an emulsifier to prepare emulsified asphalt, which is then cooled to 35°C for later use. The emulsified asphalt was mixed and stirred with ammonium salt dispersant SN5027, pH adjuster, Dow DC-436 styrene-acrylic emulsion, heavy calcium carbonate and thickener ASE60 to obtain the coating.

[0054] This comparative example also provides a pre-laid, reverse-adhesive, non-sand-surface waterproof membrane. The waterproof membrane comprises, from top to bottom, a surface coating layer, an upper cover layer, a polyester base layer, a lower cover layer, and a lower surface film layer. The surface coating layer serves as the bonding layer with the subsequently poured concrete, and the material of the surface coating layer is the surface coating paint of the pre-laid, reverse-adhesive, non-sand-surface waterproof membrane of this comparative example. The thickness of the surface coating layer is 0.2 mm. The preparation method of the pre-laid, reverse-adhesive, non-sand-surface waterproof membrane includes the following steps: S1: A 1.1mm thick long-fiber high-toughness polyester base layer is obtained by pre-impregnating it with oil. S2: Apply the top and bottom coatings to the upper and lower surfaces of the polyester base layer respectively to obtain the top and bottom coating layers, and maintain the temperature of the top coating layer at 120°C; the material of the top and bottom coatings is SBS modified bitumen coating material. S3: Spray the pre-laid, reverse-adhesive, non-sand-textured waterproof membrane surface coating onto the upper surface of the topcoat layer at a temperature of 120℃ (spraying amount: 0.2 kg / m²). 2 The surface coating is obtained with a thickness of 0.2 mm. S4: The lower surface film layer is applied to the lower surface of the lower coating layer after it has cooled to room temperature; no other film is applied to the upper surface of the top coating layer. The membrane is then compacted by a pressure roller and embossed and cut to produce the pre-laid reverse adhesive non-sanded waterproof membrane.

[0055] Test case

[0056] This test example is based on GB / T23457-2017 "Pre-laid Waterproof Membranes" PY category standard. The performance indicators of the surface coatings prepared in Examples 1-3 and Comparative Example 1 were tested, and the specific test results are shown in Table 1 below. In Table 1, "1.5mm coating" refers to the surface coatings prepared in Examples 1-3 and Comparative Example 1 being tested with a thickness of 1.5mm.

[0057] Table 1

[0058] As shown in Table 1, the surface coating of the pre-laid reverse-adhesive non-sand-surface waterproof membrane of the present invention can be sprayed onto the topcoat layer of the membrane to form a pre-laid reverse-adhesive non-sand-surface waterproof membrane. Compared with traditional sand-surface pre-laid reverse-adhesive waterproof membranes, the pre-laid reverse-adhesive non-sand-surface waterproof membrane of the present invention is lighter in weight, does not shed sand, and does not require additional sand treatment when overlapping short sides. The surface coating of the pre-laid reverse-adhesive non-sand-surface waterproof membrane of the present invention gives the membrane surface high-temperature uncoating non-stick properties, high peel strength to the subsequently poured concrete, good long-term water resistance, and high surface hardness to ensure that the coating is not damaged by steel bar puncture during construction, eliminating the need for a protective layer. The present invention also solves the problem that traditional non-sand-surface pre-laid reverse-adhesive waterproof membranes are easily damaged by steel bars, and prone to localized waterproof layer damage leading to localized water seepage.

[0059] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A pre-paved, non-stick, non-sand-faced waterproofing membrane surface-coat coating characterized in that, The coating includes the following components: anionic resin emulsified asphalt, aziridine, UV curing waterborne polyurethane acrylate, photoinitiator, nanocomposite ceramic microbead, styrene-butadiene latex, auxiliary agent and waterborne pigment paste; The auxiliary agent includes the following components: film forming auxiliary agent, pH regulator, silane coupling agent, defoaming agent and thickening agent. 2.The pre-laid anti-stick non-sand surface waterproof roll surface coating coating of claim 1, wherein, The coating includes the following components in parts by weight: anionic resin emulsified asphalt 30-75 parts, aziridine 0.5-1 part, UV curing waterborne polyurethane acrylate 10-20 parts, photoinitiator 0.5-1 part, nanocomposite ceramic microbead 10-20 parts, styrene-butadiene latex 10-20 parts, auxiliary agent 0.9-5 parts and waterborne pigment paste 1-5 parts; The auxiliary agent includes the following components in parts by weight: film forming auxiliary agent 0.1-1 part, pH regulator 0.1-1 part, silane coupling agent 0.1-0.5 part, defoaming agent 0.1-0.5 part and thickening agent 0.5-2.0 parts; The particle size of the nanocomposite ceramic microbead is 5500-6500 mesh. 3.The pre-laid anti-stick non-sand surface waterproof roll surface coating coating of claim 1 or 2, wherein, The raw materials of the anionic resin emulsified asphalt include the following components in parts by weight: water 15-30 parts, anionic emulsifier 0.5-2.5 parts, stabilizer 0.1-0.5 parts, sodium hydroxide 0.1-0.5 parts, carbon five petroleum resin 10-20 parts, naphthenic oil 8-15 parts, aromatic oil 1-5 parts and maleic anhydride grafted PP wax 1-5 parts; The anionic emulsifier is at least one of sodium dodecyl sulfonate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium dodecyl polyoxy ether sulfate.

4. The pre-ply, reverse-stick, non-sand surface waterproofing membrane top-coat coating of claim 3, wherein, The preparation method of the anionic resin emulsified asphalt includes the following steps: (1) mixing water, anionic emulsifier and stabilizer, heating, stirring, adjusting pH value by sodium hydroxide to obtain soap solution; (2) mixing naphthenic oil, aromatic oil and carbon five petroleum resin melted to flow state, stirring to obtain stirring system; mixing maleic anhydride grafted PP wax and the stirring system, stirring to obtain resin asphalt; (3) mixing the resin asphalt and the soap solution, reacting, cooling to obtain the anionic resin emulsified asphalt. 5.The pre-laid anti-stick non-sand surface waterproof roll surface coating coating of claim 4, wherein, In the step (1): heating to 50-60℃; The pH value of the soap solution is 10-12; In the step (2): melting carbon five petroleum resin to flow state at a heating temperature of 120-150℃; The maleic anhydride grafted PP wax and the stirring system are mixed at 150-160℃; In the step (3): The resin asphalt and the soap solution are mixed and reacted at 130-160℃.

6. The method for preparing the top-coat coating material for pre-installed reverse-stuck non-sand-faced waterproofing membrane according to any one of claims 1-5, characterized in that, The preparation method comprises the following steps: mixing and stirring anionic resin emulsified asphalt, film forming aid, pH regulator, photoinitiator, aziridine, UV curing water-based polyurethane acrylate, nanocomposite ceramic microbead, styrene-butadiene latex, silane coupling agent, water-based pigment paste, defoaming agent and thickening agent, to obtain the pre-laid anti-sticking non-sand surface waterproof roll material surface coating paint.

7. A pre-installed, non-stick, non-sand-faced waterproofing membrane, characterized in that, The waterproof roll material comprises, from top to bottom, a surface coating layer, an upper coating layer, a polyester base layer, a lower coating layer and a lower surface film layer. The surface coating layer is a bonding layer for post-cast concrete, and the material of the surface coating layer is the pre-laid anti-sticking non-sand surface waterproof roll material surface coating paint according to any one of claims 1-5.

8. The pre-installed reverse-stick non-sand-face waterproofing membrane according to claim 7, wherein, The thickness of the surface coating layer is 0.15-0.25 mm.

9. The pre-installed reverse-stick non-sand surface waterproofing membrane of claim 7, wherein, The preparation method of the surface coating layer comprises the following steps: The pre-laid anti-sticking non-sand surface waterproof roll material surface coating paint is sprayed on the upper surface of the upper coating layer, and then UV light is used to irradiate the paint on the upper surface of the upper coating layer, to obtain the surface coating layer. When the pre-laid anti-sticking non-sand surface waterproof roll material surface coating paint is sprayed, the temperature of the upper surface of the upper coating layer is 150-180 DEG C.

10. The pre-laid anti-sticking non-sand surface waterproof roll material according to claim 9, wherein, The spraying amount of the pre-laid anti-sticking non-sand surface waterproof roll material surface coating on the upper surface of the upper coating layer is 0.15-0.25 kg / m 2 ; The UV light irradiation has a light intensity of 300-600 mW / cm 2 .

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