A microcapsule slow-release type self-adhesive glue, a slow-release type self-adhesive waterproof roll material

Abstract

This invention belongs to the field of waterproof materials technology, specifically relating to a microcapsule-encapsulated slow-release self-adhesive and a slow-release self-adhesive waterproof membrane. The microcapsule-encapsulated slow-release self-adhesive provided by this invention comprises: 40-45 parts of tackifying resin; 10-15 parts of microcapsule slow-release agent; 15-20 parts of viscosity modifier; 20-30 parts of inorganic filler; 0.5-1.0 parts of primary antioxidant; and 0.2-0.5 parts of auxiliary antioxidant. The microcapsule slow-release agent is a titanate ester coated with nano-silica. This invention uses nano-silica to coat the surface of the titanate ester, allowing the titanate ester in the self-adhesive to be continuously and slowly released as the external environment changes. This continuously fills the gaps formed between the self-adhesive and the concrete structure under water pressure, automatically repairing leaks or sealing the capillary pores of the concrete structure. Therefore, it can adapt to the constantly changing underground waterproofing environment, achieving a long-term stable dynamic waterproofing effect.

Description

Technical Field

[0001] This invention belongs to the field of waterproof materials technology, specifically relating to a microcapsule-type slow-release self-adhesive and a slow-release self-adhesive waterproof membrane. Background Technology

[0002] Leakage from groundwater or surface water in building structures can lead to oxidation and rust expansion of reinforcing steel, compressing the main structure, causing safety problems, and reducing the building's lifespan. Currently, building leakage has become the second largest problem affecting building quality after structural integrity, and is often referred to as "building cancer."

[0003] Self-adhesive waterproof membrane is applied to the surface of structural concrete with self-adhesive adhesive to resist the penetration of groundwater and surface water, forming an impermeable "outer garment" and preventing leakage in the building structure.

[0004] However, the lifespan of concrete building structures is generally several decades or even a century. Throughout the building's lifespan, the amount and pressure of surrounding water change with depth, season, and geological conditions. At the same time, the load on the above-ground portion also changes. These changes can cause gaps and separation between the self-adhesive layer of currently available waterproof membranes and the reinforced concrete structure. As a result, the waterproof membrane's waterproofing ability deteriorates and it cannot meet the waterproofing requirements commensurate with the building's lifespan. Summary of the Invention

[0005] The purpose of this invention is to provide a microcapsule-type slow-release self-adhesive and a slow-release self-adhesive waterproof membrane. The slow-release self-adhesive waterproof membrane provided by this invention can adapt to the underground waterproofing engineering environment where water pressure and water volume are constantly changing, achieving a long-term stable dynamic waterproofing effect and realizing the technical effect of waterproofing materials having the same lifespan as buildings.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a microcapsule-type sustained-release self-adhesive, comprising the following components in parts by weight:

[0008] 40-45 parts of tackifying resin;

[0009] 10-15 parts of microcapsule sustained-release formulation;

[0010] 15-20 parts viscosity modifier;

[0011] 20-30 parts of inorganic filler;

[0012] 0.5-1.0 parts of the main antioxidant;

[0013] Add 0.2-0.5 parts of auxiliary antioxidant;

[0014] The microcapsule sustained-release agent comprises titanate and nano-silica coated on the surface of the titanate;

[0015] The viscosity modifier is an organic wax.

[0016] Preferably, the titanate is di(dioctylpyrophosphoryl)oxyacetic acid titanium; and the particle size of the nano-silica is 20~30nm.

[0017] Preferably, the mass ratio of the nano-silica to the titanate is (5~6):1.

[0018] Preferably, the preparation method of the microcapsule sustained-release agent includes the following steps:

[0019] Surface modification of nano-silica was performed using microwave or plasma to obtain surface-modified nano-silica.

[0020] The surface-modified nano-silica and titanate were mixed and coated to obtain the microcapsule sustained-release agent.

[0021] Preferably, the tackifying resin is maleic acid-grafted petroleum resin; the softening point of the maleic acid-grafted petroleum resin is 120~130℃, and the kinematic viscosity is 2500Mpas.

[0022] Preferably, the viscosity modifier is ethylene-vinyl acetate copolymer wax and / or ethylene-acrylic acid copolymer wax.

[0023] Preferably, the inorganic filler is silica powder; the primary antioxidant is 2,6-di-tert-butyl-p-methylphenol; and the secondary antioxidant is dithiodipropionate diester.

[0024] This invention provides a slow-release self-adhesive waterproof membrane, comprising a waterproof substrate;

[0025] A first slow-release self-adhesive layer and a first release layer are sequentially disposed on one surface of the waterproof substrate;

[0026] A second slow-release self-adhesive layer and a second release layer are sequentially disposed on the other surface of the waterproof substrate;

[0027] The first and second sustained-release self-adhesive layers are made of the microcapsule sustained-release self-adhesive described in the above technical solution.

[0028] Preferably, the thickness of the first slow-release self-adhesive layer and the second slow-release self-adhesive layer are independently ≥1 mm.

[0029] Preferably, the waterproof substrate is a polymer film base or a polyester base; the thickness of the polymer film base is 0.15~0.2mm, and the thickness of the polyester base is 1.5~2.0mm;

[0030] The thickness of the first isolation layer and the second isolation layer is independently 0.02~0.04mm.

[0031] This invention provides a microcapsule-type sustained-release self-adhesive, comprising the following components in parts by weight: 40-45 parts of tackifying resin; 10-15 parts of microcapsule sustained-release agent; 15-20 parts of viscosity modifier; 20-30 parts of inorganic filler; 0.5-1.0 parts of primary antioxidant; and 0.2-0.5 parts of secondary antioxidant. The microcapsule sustained-release agent comprises titanate ester and nano-silica coated on the surface of the titanate ester. The viscosity modifier is an organic wax. This invention uses nano-silica to coat the surface of titanate, allowing the titanate in the self-adhesive to be continuously and slowly released in response to changes in the external environment (such as changes in water volume and pressure). The hydrophilic and lipophilic groups in the released titanate structure act as active reactive groups, enhancing the reactivity of the self-adhesive. When combined with the tackifying resin and inorganic fillers in the self-adhesive, the creep properties of the self-adhesive change, thereby continuously filling the gaps formed between the self-adhesive and the concrete structure under water pressure, automatically repairing leaks or sealing the capillary pores of the concrete structure. This enables it to adapt to the constantly changing underground waterproofing environment, achieving a long-term stable dynamic waterproofing effect, and ultimately achieving a lifespan equal to that of the waterproofing material and the building.

[0032] This invention provides a slow-release self-adhesive waterproof membrane, comprising a waterproof substrate; a first slow-release self-adhesive layer and a first release layer sequentially disposed on one surface of the waterproof substrate; and a second slow-release self-adhesive layer and a second release layer sequentially disposed on the other surface of the waterproof substrate. The first and second slow-release self-adhesive layers are made of the microcapsule slow-release self-adhesive described in the above-mentioned technical solution. The microcapsule slow-release self-adhesive inside the self-adhesive layer of the waterproof membrane provided by this invention is continuously released as the external water volume and pressure increase. The titanate ester within the microcapsules contains high-molecular-weight free radicals (hydrophilic and lipophilic groups), which, when combined with tackifying resins and inorganic fillers, automatically repair leaks or seal capillary pores in structural concrete. This allows it to adapt to constantly changing underground engineering environments, achieving a long-term stable dynamic waterproofing effect, ultimately achieving a lifespan equal to that of the building. Detailed Implementation

[0033] This invention provides a microcapsule-type sustained-release self-adhesive, comprising the following components in parts by weight:

[0034] 40-45 parts of tackifying resin;

[0035] 10-15 parts of microcapsule sustained-release formulation;

[0036] 15-20 parts viscosity modifier;

[0037] 20-30 parts of inorganic filler;

[0038] 0.5-1.0 parts of the main antioxidant;

[0039] Add 0.2-0.5 parts of auxiliary antioxidant;

[0040] The microcapsule sustained-release agent comprises titanate and nano-silica coated on the surface of the titanate;

[0041] The viscosity modifier is an organic wax.

[0042] In this invention, unless otherwise specified, all raw materials / components used in the preparation are commercially available products well known to those skilled in the art.

[0043] The microcapsule sustained-release self-adhesive provided by the present invention comprises 40-45 parts of tackifying resin, preferably 40.5-44 parts, by weight.

[0044] In this invention, the tackifying resin is preferably a maleic acid-grafted petroleum resin. The softening point of the maleic acid-grafted petroleum resin is preferably 120-130°C, and the kinematic viscosity is preferably 2500 MPa. In a specific embodiment of this invention, the tackifying resin is preferably MA120 produced by Shanghai Shuixing Industrial Co., Ltd.

[0045] In this invention, the tackifying resin has the characteristics of aging resistance, high temperature resistance, stable color, and high peel strength.

[0046] Based on the mass fraction of the tackifying resin, the microcapsule sustained-release self-adhesive provided by the present invention includes 10 to 15 parts of microcapsule sustained-release agent, preferably 10.5 to 14 parts.

[0047] In this invention, the microcapsule sustained-release agent comprises titanate ester and nano-silica coating the surface of the titanate ester. In this invention, the microcapsule sustained-release agent uses titanate ester as the core and multiple nano-silica coatings on the surface of the titanate ester as the shell, thus achieving the sustained-release effect of the titanate ester.

[0048] In this invention, the microcapsule sustained-release agent is a titanate ester coated with nano-silica. Specifically, the titanate ester is preferably bis(dioctylpyrophosphoryl)oxyacetate titanium. In this invention, the titanate ester contains both hydrophilic (inorganic phase) and lipophilic (organic phase) groups, acting as a bridge and link between organic and inorganic substances, enhancing the bonding between interfaces. In a specific embodiment of this invention, the titanate ester is specifically KR-138S, which was purchased from Quyang Yishun Chemical Co., Ltd.

[0049] In this invention, the particle size of the nano-silica is preferably 20-30 nm. In a specific embodiment of this invention, the nano-silica is preferably purchased as S5989G from Shanghai Jizhi Biochemical Technology Co., Ltd.

[0050] In this invention, the mass ratio of the nano-silica to the titanate is preferably (5~6):1, more preferably (5.2~5.7):1.

[0051] In this invention, nano-silica gel is coated on the surface of titanate to form a sol-gel structure, wherein titanate has both hydrophilic and lipophilic groups.

[0052] In this invention, the preparation method of the microcapsule sustained-release agent preferably includes the following steps:

[0053] Surface modification of nano-silica was performed using microwave or plasma to obtain surface-modified nano-silica.

[0054] The surface-modified nano-silica and titanate were mixed and coated to obtain the microcapsule sustained-release agent.

[0055] This invention uses microwave or plasma to modify the surface of nano-silica, resulting in surface-modified nano-silica.

[0056] In this invention, the microwave is preferably obtained using a microwave transmitting device, and the power of the microwave is preferably 1.5~2kW, and the frequency is preferably 300~500MHz.

[0057] When the nano-silica is surface modified using microwaves in this invention, the surface modification time is preferably 2 to 5 minutes.

[0058] A preferred embodiment of the present invention for surface modification of nano-silica using microwaves is as follows: the nano-silica is placed in a continuously rotating disk, and microwaves are emitted by a microwave generator to induce surface modification of the nano-silica.

[0059] In this invention, the surface modification is to activate the active hydroxyl groups of silica to achieve coating of titanate.

[0060] After obtaining surface-modified nano-silica, the present invention mixes the surface-modified nano-silica with titanate ester and performs surface coating to obtain the microcapsule sustained-release agent.

[0061] In this invention, the mass ratio of the nano-silica to the titanate is (5~6):1.

[0062] In this invention, the mixing is preferably performed by sequentially rotating, extruding, and kneading the surface-modified nano-silica and titanate. This invention preferably achieves the coating of the titanate with the nano-silica through mixing.

[0063] Based on the mass fraction of the tackifying resin, the microcapsule sustained-release self-adhesive provided by the present invention includes 15 to 20 parts of viscosity modifier, preferably 15.5 to 18 parts.

[0064] In this invention, the viscosity modifier preferably comprises ethylene-vinyl acetate copolymer wax and / or ethylene-acrylic acid copolymer wax.

[0065] In this invention, the viscosity modifier is used to reduce melt viscosity, shorten curing time, and improve the flowability of the self-adhesive layer.

[0066] In this invention, the melting point of the ethylene-vinyl acetate copolymer wax is preferably 90-100°C; the penetration is preferably 9-10 mm; and the mass percentage of vinyl acetate (VA) is preferably 6-25%. In a specific embodiment of this invention, the ethylene-vinyl acetate copolymer wax is preferably Honeywell AC-400A.

[0067] In this invention, the ethylene-acrylic acid copolymer wax is preferably obtained by copolymerizing ethylene and acrylic acid; the melting point of the ethylene-acrylic acid copolymer wax is preferably 100~105℃, and the penetration is preferably 8~10mm; the ethylene-acrylic acid copolymer wax is preferably Honeywell AC-540.

[0068] In this invention, when the viscosity modifier is preferably ethylene-vinyl acetate copolymer wax and ethylene-acrylic acid copolymer wax, the mass ratio of the ethylene-vinyl acetate copolymer wax and ethylene-acrylic acid copolymer wax is preferably 1:1.

[0069] Based on the mass fraction of the tackifying resin, the microcapsule sustained-release self-adhesive provided by the present invention includes 20 to 30 parts of inorganic filler, preferably 20.5 to 28 parts.

[0070] In this invention, the inorganic filler is preferably silica powder.

[0071] In this invention, the silica powder is preferably 600-800 mesh; the specific surface area is preferably 140.21 m². 2 / g.

[0072] In this invention, the silica powder has a three-dimensional network structure and a large specific surface area, exhibiting high activity and strong cross-linking with polymers, making the self-adhesive layer more compact and improving its shear strength and peel strength. It also has good compatibility with microcapsule sustained-release agents.

[0073] In this invention, the silica powder is preferably silica powder from Huaxia Chemical.

[0074] Based on the mass fraction of the tackifying resin, the microcapsule sustained-release self-adhesive provided by the present invention includes 0.5 to 1.0 parts of a primary antioxidant, preferably 0.6 to 0.8 parts.

[0075] In this invention, the primary antioxidant is preferably 2,6-di-tert-butyl-p-methylphenol.

[0076] In this invention, the 2,6-di-tert-butyl-p-methylphenol exhibits strong antioxidant capacity, good heat resistance, and good stability.

[0077] In a specific embodiment of the present invention, the 2,6-di-tert-butyl-p-methylphenol is preferably T-501 from Baling Petrochemical Company.

[0078] Based on the mass fraction of the tackifying resin, the microcapsule sustained-release self-adhesive provided by the present invention includes 0.2 to 0.5 parts of auxiliary antioxidant, preferably 0.3 to 0.4 parts.

[0079] In this invention, the auxiliary antioxidant is preferably thiodipropionate diester, and more preferably octadecenol methanesulfonate (trans-6).

[0080] In this invention, the auxiliary antioxidant is used in combination with the primary antioxidant, resulting in a significant antioxidant effect.

[0081] In a specific embodiment of the present invention, the auxiliary antioxidant is preferably octadecenol methanesulfonate (trans-6) produced by Shanghai Kewei Chemical Technology Co., Ltd.

[0082] This invention provides a method for preparing the microcapsule-encapsulated sustained-release self-adhesive described above, preferably comprising the following steps: preheating and mixing the tackifying resin and viscosity modifier to obtain a premix; heating and mixing the premix, microcapsule sustained-release agent, inorganic filler, primary antioxidant, and secondary antioxidant to obtain the microcapsule-encapsulated sustained-release self-adhesive. In this invention, the preheating and mixing are carried out in a vacuum reactor, and the preheating temperature is preferably 140~160℃; the premixing holding time is preferably 20~30 min. In this invention, the heating temperature is preferably 160±10℃, and the mixing is preferably carried out under stirring conditions, with the stirring and mixing holding time preferably 3~5 h.

[0083] This invention provides a slow-release self-adhesive waterproof membrane, comprising a waterproof substrate;

[0084] A first slow-release self-adhesive layer and a first release layer are sequentially disposed on one surface of the waterproof substrate;

[0085] A second slow-release self-adhesive layer and a second release layer are sequentially disposed on the other surface of the waterproof substrate;

[0086] The first and second sustained-release self-adhesive layers are made of the microcapsule sustained-release self-adhesive described in the above technical solution.

[0087] The slow-release self-adhesive waterproof membrane provided by the present invention includes a waterproof substrate.

[0088] In this invention, the waterproof substrate is preferably a polymer film base or a polyester base. Specifically, the polymer film base is preferably a polyester (PET) aluminized film or a polyethylene (PE) cross-laminated film. In a specific embodiment of this invention, the polymer film base is preferably the WAF waterproof alloy film from Shanghai Ceyuan New Material Technology Co., Ltd. Furthermore, the polyester base is preferably a long-filament polyester base, specifically a long-filament polyester base from Shijiazhuang Jinliu Nonwoven Fabric Co., Ltd.

[0089] In this invention, the thickness of the polymer film base is preferably 0.15~0.2 mm.

[0090] In this invention, the thickness of the polyester substrate is preferably 1.5~2.0 μm.

[0091] The slow-release self-adhesive waterproof membrane provided by the present invention includes a first slow-release self-adhesive layer disposed on a surface of the waterproof substrate. In the present invention, the thickness of the first slow-release self-adhesive layer is independently ≥1 mm, preferably 1~1.5 mm.

[0092] The slow-release self-adhesive waterproof membrane provided by the present invention includes a first release layer disposed on the surface of the first slow-release self-adhesive layer.

[0093] In this invention, the first release layer is preferably a PE release film or a PET release film.

[0094] In this invention, the thickness of the first isolation layer is preferably 0.02~0.04 mm.

[0095] The slow-release self-adhesive waterproof membrane provided by the present invention includes a second slow-release self-adhesive layer disposed on another surface of the waterproof substrate. In the present invention, the thickness of the second slow-release self-adhesive layer is independently ≥1 mm, preferably 1~1.5 mm.

[0096] The slow-release self-adhesive waterproof membrane provided by the present invention includes a second release layer disposed on the surface of the second slow-release self-adhesive layer.

[0097] In this invention, the second release layer is preferably a PE release film or a PET release film.

[0098] In this invention, the thickness of the second isolation layer is preferably 0.02~0.04 mm.

[0099] The method for preparing the slow-release self-adhesive waterproof membrane according to the above-described technical solution provided by the present invention preferably includes the following steps:

[0100] The microcapsule-type slow-release self-adhesive described in the above technical solution is coated on both surfaces of the waterproof substrate to form a first slow-release self-adhesive layer and a second slow-release self-adhesive layer;

[0101] A first release layer and a second release layer are respectively applied to the surfaces of the first slow-release self-adhesive layer and the second slow-release self-adhesive layer to obtain the slow-release self-adhesive waterproof membrane.

[0102] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0103] Example 1

[0104] Ten parts of nano-silica (particle size 20~30 nm, S5989G from Shanghai Jizhi Biochemical Technology Co., Ltd.) were added into a continuously rotating disk. The surface of the nano-silica was modified by microwave induction (power 2 kW, frequency 500 MHz, microwave treatment time 3 min). Then, two parts of titanate (KR-138S) were added, and the mixture was rotated, squeezed, and kneaded to form 12 parts of microcapsule sustained-release agent.

[0105] 45 parts of tackifying resin (maleic acid grafted petroleum resin, Shanghai Shuixing Industrial Co., Ltd. MA120) and 20 parts of viscosity modifier (ethylene-vinyl acetate copolymer wax, Honeywell AC-400A) were added to a vacuum reaction vessel, heated to 140℃, and mixed and stirred for 30 min. Then, 22 parts of filler (silica powder, 600~800 mesh, Huaxia Chemical), 12 parts of microcapsule sustained-release agent, 0.7 parts of primary antioxidant (Baling Petrochemical Co., Ltd. T-501), and 0.3 parts of auxiliary antioxidant (octadecenol methanesulfonate (trans-6) produced by Shanghai Kewei Chemical Technology Co., Ltd.) were added. The mixture was stirred at 160±10℃ for 5 h to form a microcapsule sustained-release self-adhesive.

[0106] Microcapsule-coated slow-release self-adhesive was coated on both sides of a polymer film base (WAF waterproof alloy film from Shanghai Ceyuan New Material Technology Co., Ltd., with a thickness of 0.15mm), with an adhesive layer thickness of 1.0mm; then, a 0.02mm thick PET release film was applied to both sides, and the film was cooled and rolled up to obtain a slow-release self-adhesive waterproof membrane.

[0107] Example 2

[0108] 12.5 parts of nano silica (particle size 20~30 nm, S5989G from Shanghai Jizhi Biochemical Technology Co., Ltd.) were added into a continuously rotating disk. The surface of the nano silica was modified by microwave induction (power 1.5kw, frequency 300MHz, microwave treatment time 5min). Then, 2.5 parts of titanate (KR-138S) were added, and the mixture was rotated, squeezed and rubbed to form 15 parts of microcapsule sustained-release agent.

[0109] Add 40 parts of tackifying resin (maleic acid grafted petroleum resin, Shanghai Shuixing Industrial Co., Ltd. MA120) and 20 parts of viscosity modifier (ethylene-acrylic acid copolymer wax, Honeywell AC-540) to a vacuum reactor, heat to 140℃, and mix and stir for 30 min; add 24 parts of filler (silica powder, 600~800 mesh, Huaxia Chemical), 15 parts of microcapsule sustained-release agent, 0.5 parts of primary antioxidant (Baling Petrochemical Co., Ltd. T-501), and 0.5 parts of auxiliary antioxidant (octadecenol methanesulfonate (trans-6) produced by Shanghai Kewei Chemical Technology Co., Ltd.) and maintain the temperature at 160±10℃ and stir for 3 h to form microcapsule sustained-release self-adhesive.

[0110] Microcapsule-coated slow-release self-adhesive layers are coated on both sides of a polymer film base (WAF waterproof alloy film from Shanghai Ceyuan New Material Technology Co., Ltd., with a thickness of 0.2 mm) to form a self-adhesive waterproof roll with an adhesive layer thickness of 1.0 mm; then, a 0.03 mm thick PET release film is applied to both sides, and the roll is cooled and wound up to obtain the slow-release self-adhesive waterproof roll.

[0111] Example 3

[0112] Nine parts of nano-silica (particle size 20-30 nm, S5989G from Shanghai Jizhi Biochemical Technology Co., Ltd.) were added to a continuously rotating disk. The surface of the nano-silica was modified by microwave induction (power 1.5 kW, frequency 300 MHz, microwave treatment time 5 min). Then, 1.5 parts of titanate (KR-138S) were added, and the mixture was rotated, extruded, and spherical to form 10.5 parts of microcapsule sustained-release agent.

[0113] 43 parts of tackifying resin (maleic acid grafted petroleum resin, Shanghai Shuixing Industrial Co., Ltd. MA120) and 15 parts of viscosity modifier (ethylene-vinyl acetate copolymer wax, Honeywell AC-400A ethylene-acrylic acid copolymer wax, Honeywell AC-540, mass ratio 1:1) were added to a vacuum reaction vessel, heated to 150℃, and mixed and stirred for 25 min. 30 parts of filler (silica powder, 600~800 mesh, Huaxia Chemical), 10.5 parts of microcapsule sustained-release agent, 1.0 part of primary antioxidant (Baling Petrochemical Co., Ltd. T-501), and 0.5 parts of auxiliary antioxidant (octadecenol methanesulfonate (trans-6) produced by Shanghai Kewei Chemical Technology Co., Ltd.) were added. The mixture was stirred at 160±10℃ for 4 h to form a microcapsule sustained-release self-adhesive.

[0114] The microcapsule-coated slow-release self-adhesive layer is coated on both sides of a polymer film base (WAF waterproof alloy film from Shanghai Ceyuan New Material Technology Co., Ltd., with a thickness of 0.2 mm) to form a self-adhesive waterproof membrane with an adhesive layer thickness of 1.0 mm; then a PE release film with a thickness of 0.04 mm is applied to both sides, and the membrane is cooled and rolled up to obtain the slow-release self-adhesive waterproof membrane.

[0115] Example 4

[0116] Ten parts of nano-silica (particle size 20~30 nm, S5989G from Shanghai Jizhi Biochemical Technology Co., Ltd.) were added into a continuously rotating disk. The surface of the nano-silica was modified by microwave induction (power 1.5kw, frequency 300MHz, microwave treatment time 5min). Then, two parts of titanate (KR-138S) were added, and the mixture was rotated, squeezed, and spherical to form 12 parts of microcapsule sustained-release agent.

[0117] 42 parts of tackifying resin (maleic acid grafted petroleum resin, Shanghai Shuixing Industrial Co., Ltd. MA120) and 17 parts of viscosity modifier (ethylene-vinyl acetate copolymer wax, Honeywell AC-400A ethylene-acrylic acid copolymer wax, Honeywell AC-540, mass ratio 1:1) were added to a vacuum reaction vessel, heated to 160℃, and mixed and stirred for 30 min. 28 parts of filler (silica powder, 600~800 mesh, Huaxia Chemical), 12 parts of microcapsule sustained-release agent, 0.7 parts of primary antioxidant (Baling Petrochemical Co., Ltd. T-501), and 0.3 parts of auxiliary antioxidant (octadecenol methanesulfonate (trans-6) produced by Shanghai Kewei Chemical Technology Co., Ltd.) were added. The mixture was stirred at 160±10℃ for 5 h to form a microcapsule sustained-release self-adhesive.

[0118] The microcapsule-coated slow-release self-adhesive layer is coated on both sides of a polymer film base (WAF waterproof alloy film of Shanghai Ceyuan New Material Technology Co., Ltd., with a thickness of 0.2mm) to form a self-adhesive waterproof membrane with an adhesive layer thickness of 1.0mm; then a PE release film with a thickness of 0.04mm is applied to both sides to obtain the slow-release self-adhesive waterproof membrane.

[0119] Comparative Example 1

[0120] Add 45 parts of petroleum asphalt and 18 parts of aromatic oil to a mixing tank and heat to 160°C. Add 10 parts of SBS thermoplastic elastomer, 7 parts of rubber powder and 20 parts of filler (silica powder, 600~800 mesh, Huaxia Chemical). Keep the temperature between 170-180°C and stir for 10-12 hours to form modified asphalt adhesive.

[0121] A modified bitumen adhesive layer is applied to both sides of a polymer film base (WAF waterproof alloy film from Shanghai Ceyuan New Material Technology Co., Ltd., with a thickness of 0.2mm). The thickness of the adhesive layer on both sides is 1.0mm. Then, a PET release film with a thickness of 0.04mm is applied to both sides. The film is then cooled and rolled up to form the finished product.

[0122] The waterproof membrane products prepared in Examples 1-4 and Comparative Example 1 were subjected to physical performance testing, and the indicators are shown in Table 1.

[0123] Table 1. Performance test results of waterproof membrane products prepared in Examples 1-4 and Comparative Example 1

[0124]

[0125] As shown in Table 1, the microcapsule-released self-adhesive dynamic waterproof membrane provided by this invention is a waterproof membrane prepared with a microcapsule-released self-adhesive layer. It contains high molecular free radicals, which can gradually undergo self-polymerization or condensation according to the amount of water when exposed to water, releasing effective active ingredients, automatically repairing leaks or sealing the capillary pores of structural concrete, and can adapt to the underground engineering environment with constantly changing water pressure and volume, achieving a long-term stable dynamic waterproof effect.

[0126] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. Other embodiments can be obtained based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A microcapsule sustained-release type self-adhesive glue, characterized by, The composition comprises the following quality parts: tackifying resin 40~45 parts; microcapsule slow-release agent 10~15 parts; viscosity regulator 15~20 parts; inorganic filler 20~30 parts; primary antioxidant 0.5~1.0 parts; auxiliary antioxidant 0.2~0.5 parts; The microcapsule slow-release agent comprises titanate and nanosilica coated on the surface of the titanate; the preparation method of the microcapsule slow-release agent comprises the following steps: surface modification of nanosilica by microwave or plasma to obtain surface-modified nanosilica; mixing the surface-modified nanosilica and titanate, and performing surface coating to obtain the microcapsule slow-release agent. The tackifying resin is maleic acid grafted petroleum resin; the viscosity regulator is organic wax.

2. The microcapsule sustained-release type self-adhesive of claim 1, wherein, The titanate is bis(dioctyl pyrophosphoryl) oxoacetate titanium; the particle size of the nanosilica is 20~30 nm.

3. The microcapsule sustained-release type self-adhesive according to claim 1 or 2, characterized by, The mass ratio of the nanosilica to the titanate is (5~6):

1.

4. The microcapsule sustained-release type self-adhesive of claim 1, wherein the microcapsule sustained-release type self-adhesive is characterized by, The softening point of the maleic acid grafted petroleum resin is 120~130℃, and the kinematic viscosity is 2500 Mpas.

5. The microcapsule-encapsulated sustained-release self-adhesive according to claim 1, characterized in that, The viscosity regulator is ethylene-vinyl acetate copolymer wax and / or ethylene-acrylic acid copolymer wax.

6. The microencapsulated slow-release self-adhesive of claim 1, wherein The inorganic filler is silica powder; the primary antioxidant is 2.6-di-tert-butyl-p-cresol; and the auxiliary antioxidant is thiodipropionic acid bis ester.

7. A slow-release self-adhering waterproofing membrane, characterized in that, The waterproof substrate is provided; The first slow-release type self-adhesive layer and the first release layer are sequentially arranged on one surface of the waterproof substrate; The second slow-release type self-adhesive layer and the second release layer are sequentially arranged on the other surface of the waterproof substrate; The material of the first slow-release type self-adhesive layer and the second slow-release type self-adhesive layer is the microcapsule slow-release type self-adhesive of any one of claims 1~6.

8. The slow-release self-adhering waterproofing membrane according to claim 7, characterized in that, The thickness of the first slow-release type self-adhesive layer and the second slow-release type self-adhesive layer is independently ≥1 mm.

9. The slow-release self-adhering waterproofing membrane according to claim 7, characterized in that, The waterproof substrate is a polymer film base or a polyester base; the thickness of the polymer film base is 0.15~0.2 mm, and the thickness of the polyester base is 1.5~2.0 mm; The thickness of the first release layer and the second release layer is independently 0.02~0.04 mm.

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