Silane modified polyether waterproof coating, preparation method thereof and application of modified epoxy resin

Abstract

The invention discloses a silane modified polyether waterproof coating, a preparation method thereof and application of modified epoxy resin. The coating comprises the following components in parts by weight: 100 parts of Wacker alkoxy-terminated polyether; 86 to 120 parts of clock alkoxy terminated polyether; 18 to 32 parts of special polyether polyol; 2 to 5 parts of isocyanate siloxane; 5 to 8 parts of diisocyanate; 180 to 250 parts of an active plasticizer; 340 to 650 parts of pigment and filler; 5-13 parts of modified epoxy resin containing an epoxy-terminated group, an alkoxy silane group and an epoxy alkyl acrylate monomer derivative chain segment; 4-16 parts of a latent curing agent; 4-10 parts of a water removal agent; 1-3 parts of an accelerant; and 0.6-2.3 parts of a catalyst. Alkoxy silane in the coating is hydrolyzed, alkoxy-terminated polyether and hydroxyl on a base surface are cross-linked to improve the bonding force, modified epoxy resin, isocyanate siloxane and special polyether polyol improve the anti-stripping performance of the coiled material, and epoxy groups of the active plasticizer are cross-linked with the hydrolyzed latent curing agent to prevent migration of the plasticizer.

Description

Technical Field

[0001] The present application belongs to the field of coating technology, and in particular relates to a silane-modified polyether waterproof coating, a preparation method thereof, and uses of a modified epoxy resin. Background Art

[0002] Silane-modified polyether waterproof coating is a one-component, solvent-free waterproof coating made of modified polyether resin as the base polymer, functional additives, fillers and catalysts. It has the advantages of high elongation, high tensile strength, good low-temperature flexibility and low water absorption. Silane polyether resin, also known as end-silane modified polyether resin or silicone modified polyether resin, initially appeared mainly in the form of end-silane polyether sealant. Silane polyether sealant is also known as MS sealant, silicone modified polyether sealant and modified silicone sealant. When used, it is coated on the base layer and cured by reaction with moisture to form a continuous and seamless polymer elastic waterproof membrane. Silane-modified polyether waterproof coating can be used on roofs, exterior walls and other parts with the application of an appropriate protective layer. The coating can be applied to the designed thickness in one application by scraping, rolling, brushing, spraying and other construction methods, saving time and construction costs.

[0003] In the field of building waterproofing, silane-modified polyether waterproof coatings can be applied to cold construction of some waterproof coiled materials to form a second waterproof layer. Silane-modified polyether waterproof coatings and the surface of waterproof coiled materials can form a good bonding interface, showing excellent bonding performance. The formed coating coiled material bonding layer has excellent bonding and adhesion properties. The bonding layer has the characteristics of being tight and impermeable, excellent performance, excellent overall waterproof effect, and long service life. It is promoted as a new type of waterproof coating. However, the inventors of this application found in the process of using silane-modified polyether waterproof coatings that the traditional silane-modified polyether waterproof coatings will cause compatibility problems with waterproof coiled materials due to the migration of plasticizers. The migration of plasticizers will cause swelling effects on waterproof coiled materials, especially waterproof coiled materials composed of components such as asphaltene and butyl gum, and reduce the cohesive force and bonding and peeling properties of the coiled material components themselves to varying degrees. At the same time, the traditional silane-modified polyether waterproof coating has poor adhesion to cement substrates, low bonding performance, and certain requirements for substrate dryness. The coating has poor wettability on concrete substrates with visible water, making it difficult to apply and construct, and the bonding strength decreases significantly, resulting in poor bonding effect, which cannot meet the construction progress requirements and waterproof requirements. Therefore, how to prepare a silane-modified polyether waterproof coating that has excellent adhesion, does not cause compatibility problems such as plasticizer migration to waterproof membranes, and can be directly constructed on wet substrates has become a problem that needs to be solved urgently. Summary of the invention

[0004] The embodiment of the present application provides a silane-modified polyether waterproof coating and a preparation method thereof. The prepared silane-modified polyether waterproof coating can wet the concrete base surface and be directly constructed on the wet concrete base surface, thereby improving the bonding performance and anti-peeling performance with the waterproof membrane and preventing the migration of plasticizers.

[0005] In the first aspect, the present application provides a silane-modified polyether waterproof coating, comprising the following components in parts by weight: Wacker alkoxy-terminated polyether, 100 parts by weight; Zhonghua alkoxy-terminated polyether, 86-120 parts by weight; special polyether polyol, 18-32 parts by weight; isocyanate siloxane, 2-5 parts by weight; diisocyanate, 5-8 parts by weight; active plasticizer, 180-250 parts by weight; pigments and fillers, 340-650 parts by weight; modified epoxy resin, 5-13 parts by weight; modified epoxy resin containing terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived segments; latent curing agent, 4-16 parts by weight; dehydrating agent, 4-10 parts by weight; accelerator, 1-3 parts by weight; catalyst, 0.6-2.3 parts by weight.

[0006] According to an embodiment of the first aspect of the present application, the epoxy equivalent of the modified epoxy resin is 260 g / mol to 430 g / mol.

[0007] According to an embodiment of the first aspect of the present application, the Wacker alkoxy-terminated polyether is selected from STP-E35, STP-E30, STP-E15 and STP-E10 or a combination thereof.

[0008] According to an embodiment of the first aspect of the present application, the potassium alkoxy terminated polyether is selected from SAX227, SAX327, SAX220 and SAX750 or a combination thereof.

[0009] According to an embodiment of the first aspect of the present application, the special polyether polyol is selected from water-soluble polyether NJ-480S, NJ-2442 or a combination thereof.

[0010] According to an embodiment of the first aspect of the present application, the isocyanate siloxane is selected from γ-isocyanate propyl trimethoxy silane, γ-isocyanate propyl triethoxy silane, isocyanate methyl trimethoxy silane or a combination thereof.

[0011] According to an embodiment of the first aspect of the present application, the diisocyanate is selected from aromatic diisocyanate and aliphatic diisocyanate or a combination thereof.

[0012] According to an embodiment of the first aspect of the present application, the diisocyanate is selected from toluene diisocyanate, diphenylmethane-4,4'-diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, xylylene diisocyanate, tetramethyl-m-xylylene diisocyanate or a combination thereof.

[0013] According to an embodiment of the first aspect of the present application, the active plasticizer is selected from epoxidized soybean oil, epoxidized linseed oil, epoxidized cottonseed oil, epoxidized rice bran oil, epoxidized sunflower oil or a combination thereof.

[0014] According to an embodiment of the first aspect of the present application, the pigment filler is selected from fumed silica, nano calcium carbonate, heavy calcium carbonate, modified heavy calcium carbonate, nano clay, carbon black, modified clay or a combination thereof.

[0015] According to an embodiment of the first aspect of the present application, the modified epoxy resin includes a structure shown in formula (1):

[0016]

[0017] In formula (1), n ​​is an integer of 1 to 25, X is an integer of 1 to 3; R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight chain or branched chain alkyl group, m1+m2=3; R4 includes a group having the following structural formula:

[0018]

[0019] In formula (2), X is an integer of 1 to 3, R5 is H, R6 is a C3 or C7 alkylene oxide, R7 is H or methyl, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

[0020] According to an embodiment of the first aspect of the present application, in formula (1), n ​​is an integer of 1 to 2; R1 is a propylene group, R2 is a methyl group, and R3 is a methyl group or an ethyl group.

[0021] According to an embodiment of the first aspect of the present application, in formula (2), R4 is a structure represented by any one of formulas (2-a) to (2-d):

[0022]

[0023] In formula (2-a) to formula (2-d), X is an integer of 1 to 3, R5 is H, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

[0024] According to an embodiment of the first aspect of the present application, the modified epoxy resin is prepared by the following preparation steps:

[0025] Bisphenol A epoxy resin and urea silane coupling agent are mixed and reacted to prepare reactant A; the structural reaction formula (3) for preparing modified epoxy resin by reacting bisphenol A epoxy resin and urea silane coupling agent is:

[0026]

[0027]

[0028] In reaction formula (3), n is an integer of 1 to 25, R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight chain or branched chain alkyl group, and m1+m2=3;

[0029] Under the protection of inert gas, an epoxyalkyl acrylate monomer and an initiator are added to the reactant A to prepare a modified epoxy resin; the reaction formula (4) for preparing the modified epoxy resin from the reactant A and the epoxyalkyl acrylate monomer is:

[0030]

[0031] In reaction formula (4), n is an integer of 1 to 25, R1 is a straight or branched alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight or branched alkyl group, and m1+m2=3; R6 is a C3 or C7 alkylene oxide group, R7 is H or methyl, and R4 includes a group of the following structural formula:

[0032]

[0033] In formula (2), X is an integer of 1 to 3, R5 is H, R6 is a C3 or C7 alkylene oxide, R7 is H or methyl, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

[0034] According to an embodiment of the first aspect of the present application, the bisphenol A epoxy resin is selected from bisphenol A epoxy resin E44, bisphenol A epoxy resin E51, bisphenol A epoxy resin 128 or a combination thereof.

[0035] According to an embodiment of the first aspect of the present application, the urea-based silane coupling agent is selected from γ-urea-based propyltrimethoxysilane, γ-urea-based propyltriethoxysilane, 3-(diisopropylurea-based propyl)triethoxysilane or a combination thereof.

[0036] According to an embodiment of the first aspect of the present application, the initiator is selected from benzoyl peroxide, dibenzoyl peroxide, tert-butyl perbenzoate, tert-amyl peroxy-2-ethylhexyl ester, 1,1-bis(tert-amylperoxy)cyclohexane or a combination thereof.

[0037] According to an embodiment of the first aspect of the present application, the bisphenol A epoxy resin, the urea-based silane coupling agent and the epoxyalkyl acrylate monomer are added in a molar ratio of 1:(1-1.05):(1-3).

[0038] According to an embodiment of the first aspect of the present application, the epoxyalkyl acrylate monomer is selected from 2,3-epoxypropyl acrylate, glycidyl methacrylate, 3,4-epoxycyclohexyl methyl methacrylate, 3,4-epoxycyclohexyl methacrylate or a combination thereof.

[0039] According to an embodiment of the first aspect of the present application, the latent curing agent is selected from aldimines, ketimines, oxazolidines or a combination thereof.

[0040] According to an embodiment of the first aspect of the present application, the latent curing agent is selected from XY-401, YRLH-1106, JW505 or a combination thereof.

[0041] According to an embodiment of the first aspect of the present application, the dehydrating agent is selected from vinyltrimethoxysilane, vinyltriacetoxysilane, vinyltriethoxysilane or a combination thereof.

[0042] According to an embodiment of the first aspect of the present application, the accelerator is selected from triacetoxyethylsilane, vinyltriacetoxysilane, diethyldiacetoxysilane or a combination thereof.

[0043] According to an embodiment of the first aspect of the present application, the catalyst is selected from dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, a chelated tin catalyst or a combination thereof.

[0044] According to an embodiment of the first aspect of the present application, the chelated tin catalyst is selected from U-220H, WCAT-NS01, SG-U303 or a combination thereof.

[0045] In a second aspect, the present application provides a method for preparing a silane-modified polyether waterproof coating, comprising: dispersing the Wacker alkoxy-terminated polyether, the potassium-modified alkoxy-terminated polyether, the special polyether polyol, the active plasticizer, and the pigment to obtain a second dispersed slurry; heating the second dispersed slurry to 100°C to 110°C, vacuuming and dehydrating the slurry to obtain a dehydrated product; cooling the dehydrated product to 85°C to 90°C, adding isocyanate siloxane and diisocyanate to react under the protection of an inert gas to obtain a first reaction product; cooling the first reaction product to 60°C to 70°C, adding the above-mentioned modified epoxy resin and latent curing agent to perform vacuum dispersion treatment to obtain a first modified product; cooling the first modified product to 50°C to 60°C, adding a dehydrating agent and a accelerator to perform vacuum dispersion treatment to obtain a second modified product; adding a catalyst to the second modified product to perform vacuum dispersion treatment to obtain a silane-modified polyether waterproof coating.

[0046] According to an embodiment of the second aspect of the present application, Wacker alkoxy-terminated polyether, K-type alkoxy-terminated polyether, special polyether polyol, active plasticizer, and pigments and fillers are dispersed, including: dispersing Wacker alkoxy-terminated polyether, K-type alkoxy-terminated polyether, special polyether polyol, and active plasticizer to obtain a first dispersed slurry; heating the first dispersed slurry to 90° C. to 100° C. and adding pigments and fillers for dispersion to obtain a second dispersed slurry.

[0047] According to an embodiment of the second aspect of the present application, the preparation method of the silane-modified polyether waterproof coating further includes: cooling the silane-modified polyether waterproof coating to ≤50°C and filling it with nitrogen for protection.

[0048] In a third aspect, an embodiment of the present application provides a use of a modified epoxy resin for preparing a silane-modified polyether waterproof coating, wherein the modified epoxy resin contains terminal epoxy groups, alkoxysilane groups, and epoxyalkyl acrylate monomer-derived segments.

[0049] The silane-modified polyether waterproof coating and its preparation method of the embodiment of the present application, through the modified epoxy resin containing special structural molecules of terminal epoxy groups, alkoxysilane groups and acrylic epoxy groups, special polyether polyols, diisocyanates and isocyanate siloxanes, the siloxane-terminated prepolymers generated can improve the adhesion and peeling performance of the coating to asphalt waterproofing membranes, improve the coating and concrete base surface, especially improve the affinity and wettability of the coating and wet concrete base surface. The alkoxysilane groups contained in the molecular structure of the modified epoxy resin and the prepolymer undergo condensation cross-linking reactions with other siloxanes after hydrolysis, and at the same time, the adhesion is improved by the reaction of the alkoxysilane groups with the hydroxyl groups on the concrete base surface. The introduction of modified epoxy resins and isocyanate siloxanes improves the adhesion, water resistance, heat resistance and weather resistance of the coating. The terminal epoxy groups in the modified epoxy resin molecular structure and the epoxy groups in the active plasticizer further achieve cross-linking reaction with the hydrolyzed latent curing agent, giving full play to the excellent adhesion of the epoxy resin. After curing, there are no free plasticizer molecules to prevent plasticizer migration. DETAILED DESCRIPTION

[0050] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] In order to solve the problems of the prior art, the present application provides a silane-modified polyether waterproof coating and a preparation method thereof and a use of a modified epoxy resin. The silane-modified polyether waterproof coating provided in the present application is first introduced below.

[0053] In the first aspect, the present application provides a silane-modified polyether waterproof coating, comprising the following components in parts by weight: 100 parts by weight of Wacker alkoxy-terminated polyether; 86 to 120 parts by weight of alkoxy-terminated polyether; 18 to 32 parts by weight of special polyether polyol; 2 to 5 parts by weight of isocyanate siloxane; 5 to 8 parts by weight of diisocyanate; 180 to 250 parts by weight of active plasticizer; 340 to 650 parts by weight of pigments and fillers; 5 to 13 parts by weight of modified epoxy resin, the modified epoxy resin containing terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived segments; latent curing agent, 4 to 16 parts by weight; dehydrating agent, 4 to 10 parts by weight; accelerator, 1 to 3 parts by weight; catalyst, 0.6 to 2.3 parts by weight.

[0054] The silane-modified polyether waterproof coating of the embodiment of the present application is a modified epoxy resin containing special structural molecules of terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived chain segments, a special polyether polyol, a diisocyanate and an isocyanate siloxane to form a siloxane-terminated prepolymer, which can improve the adhesion and peeling performance of the coating to the asphalt waterproofing membrane, improve the coating and the concrete base surface, especially improve the affinity and wettability of the coating to the wet concrete base surface. The alkoxysilane groups contained in the modified epoxy resin molecular structure and the prepolymer undergo condensation cross-linking reactions with other siloxanes after hydrolysis, and at the same time, the hydroxyl groups after the hydrolysis of the alkoxysilane groups react with the hydroxyl groups on the concrete base surface to improve the adhesion. The introduction of modified epoxy resin and isocyanate siloxane improves the adhesion, water resistance, heat resistance and weather resistance of the coating. The epoxy groups in the modified epoxy resin molecular structure and the epoxy groups in the active plasticizer further achieve cross-linking reaction with the hydrolyzed latent curing agent, giving full play to the excellent adhesion of the epoxy resin. There are no free plasticizer molecules after curing, which prevents the migration of the plasticizer and thus prevents compatibility problems with the asphalt waterproof membrane.

[0055] In an embodiment of the present application, the molecular chain skeleton of the modified epoxy resin has terminal epoxy groups, alkoxysilane groups, and epoxyalkyl acrylate monomer derived segments. In each mole of the modified epoxy resin, since the urea silane coupling agent is equal to or slightly greater than the content of the bisphenol A type epoxy resin, the content of the corresponding alkoxysilane group is equal to or slightly greater than the content of the modified epoxy resin, which contains at least 1 mol to 3 mol of siloxane groups, that is, the substituents in the alkoxysilane group can be 1 or 2 or 3 siloxane groups. Exemplarily, the content of siloxane groups in each mole of the modified epoxy resin can be 1.1 mol, 1.2 mol, 1.3 mol, 1.45 mol, 1.5 mol, 1.55 mol, 1.7 mol, 1.8 mol, 1.84 mol, 1.9 mol, 2.0 mol, 2.1 mol, 2.3 mol, 2.5 mol, 2.6 mol, 2.75 mol, 2.8 mol, 2.95 mol.

[0056] In some embodiments of the present application, the epoxy equivalent of the modified epoxy resin is 260g / mol to 430g / mol. The modified epoxy resin of the present application has a suitable epoxy equivalent range, especially the modified epoxy resin within the above range is not only highly active, fast crosslinking speed, high crosslinking density, can improve the peeling strength and bonding performance of the waterproof coiled material, but also can further take into account the heat resistance and mechanical strength of the coating, such as tensile strength, tear strength, etc. Exemplarily, the epoxy equivalent of the modified epoxy resin is 264g / mol, 274g / mol, 284g / mol, 290g / mol, 296g / mol, 300g / mol, 318g / mol, 407g / mol, 412g / mol, 420g / mol, 426g / mol, 430g / mol.

[0057] In some embodiments of the present application, the Wacker alkoxy-terminated polyether is selected from STP-E35, STP-E30, STP-E15 and STP-E10 or a combination thereof.

[0058] In some embodiments of the present application, the potassium alkoxy terminated polyether is selected from SAX227, SAX327, SAX220 and SAX750 or a combination thereof.

[0059] In the embodiments of the present application, Wacker alkoxy-terminated polyethers and Kaneka alkoxy-terminated polyethers have meanings known in the art. Wacker alkoxy-terminated polyethers may represent alkoxy-terminated polyethers produced by Wacker Group (Wacker) or alkoxy-terminated polyethers produced according to Wacker's production process. Kaneka alkoxy-terminated polyethers may represent alkoxy-terminated polyethers produced by Kaneka Chemical Industry (Kaneka, Kaneka) Co., Ltd. of Japan or alkoxy-terminated polyethers produced according to Kaneka's production process. Kaneka alkoxy-terminated polyethers are generally prepared by grafting silane compounds containing hydrolyzable siloxane groups to both ends of a polyether having difunctionality through a specific chemical reaction.

[0060] In some embodiments of the present application, the special polyether polyol is selected from water-soluble polyether NJ-480S, NJ-2442 or a combination thereof.

[0061] In the embodiments of the present application, the functionality of the alcoholic hydroxyl group in the special polyether polyol is 3, which serves to enhance the affinity of the coating system to the concrete base, especially the wet concrete base, thereby enhancing the adhesion performance of the coating. The special polyether polyol is a conventional polyether polyol molecular structure in which a hydrophilic group is introduced, so that the entire molecular structure has the following characteristics: first, it has good water solubility or hydrophilicity, has good wetting properties on the wet concrete base, and helps to enhance the adhesion performance of the coating to the polar base; second, it has high reactivity, because the special polyether polyol molecule also contains multiple active groups (such as alcoholic hydroxyl groups), it is very easy to react with other molecules (such as diisocyanates, isocyanate siloxanes, modified epoxy resins) to form a polymer with a network structure, thereby enhancing the mechanical properties of the coating.

[0062] In some embodiments, the isocyanate siloxane is selected from γ-isocyanate propyl trimethoxy silane, γ-isocyanate propyl triethoxy silane, isocyanate methyl trimethoxy silane, or a combination thereof.

[0063] In the embodiments of the present application, isocyanate siloxane is used as a capping agent, and the special polyether polyol first reacts with diisocyanate to form a hydroxyl-terminated prepolymer, and then the hydroxyl-terminated prepolymer reacts with isocyanate siloxane to form a siloxane-terminated prepolymer.

[0064] In some embodiments of the present application, the diisocyanate is selected from aromatic diisocyanate, aliphatic diisocyanate or a combination thereof.

[0065] In some embodiments of the present application, the diisocyanate is selected from toluene diisocyanate, diphenylmethane-4,4'-diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, xylylene diisocyanate, tetramethyl-m-xylylene diisocyanate or a combination thereof. The diisocyanate reacts with the special polyether polyol to form a hydroxyl-terminated prepolymer, which mainly acts as a chain extender or a crosslinking agent.

[0066] In some embodiments of the present application, the active plasticizer is selected from epoxidized soybean oil, epoxidized linseed oil, epoxidized cottonseed oil, epoxidized rice bran oil, epoxidized sunflower oil or a combination thereof.

[0067] In the embodiments of the present application, epoxy vegetable oil utilizes the excellent adhesion of epoxy resin and can undergo a cross-linking reaction with the hydrolyzed latent curing agent through the epoxy groups in its molecules, so that there are no free plasticizer molecules after the coating is cured, thereby preventing the migration of plasticizers and further preventing compatibility problems with asphalt waterproofing membranes.

[0068] In some embodiments of the present application, the pigment filler is selected from fumed silica, nano calcium carbonate, heavy calcium carbonate, modified heavy calcium carbonate, nano clay, carbon black, modified clay or a combination thereof.

[0069] In the embodiments of the present application, the flexibility of the coating film can be enhanced by chemically reacting the modified epoxy resin, special polyether polyol, diisocyanate, isocyanate siloxane, reactive diluent, Wacker alkoxy-terminated polyether and potassium-terminated alkoxy-terminated polyether to form chemical bonds and physical entanglement of the generated macromolecules. The combination with pigments and fillers can further enhance the heat resistance and weather resistance of the coating film.

[0070] In some embodiments of the present application, the modified epoxy resin includes a structure shown in formula (1):

[0071]

[0072] In formula (1), n ​​is an integer of 1 to 25; R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms; R2 is a C1-C3 alkyl group; R3 is a C1-C3 straight chain or branched chain alkyl group; m1+m2=3; and R4 includes a group of the following structural formula:

[0073]

[0074] In formula (2), X is an integer of 1 to 3, R5 is H, R6 is a C3 or C7 alkylene oxide, R7 is H or methyl, Indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin. Wherein, m1 represents the number of alkyl groups, m2 represents the number of oxyalkyl groups, and m1+m2=3 indicates that at least one oxyalkyl group or three oxyalkyl groups are connected to the silicon atom to which R1 is connected in formula (1).

[0075] In the embodiments of the present application, in formula (1), n ​​is an integer of 1 to 2, R1 is a propylene group, R2 is a methyl group, and R3 is a methyl group or an ethyl group. The modified epoxy resin that meets the above definition has a moderate molecular weight, so that the overall application effect of the silane-modified polyether waterproof coating is relatively good.

[0076] In formula (2), R4 is a structure represented by any one of formulas (2-a) to (2-d):

[0077]

[0078] In formula (2-a) to formula (2-d), R5 is H, X is an integer of 1 to 3, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

[0079] In the embodiments of the present application, the modified epoxy resin is prepared by the following preparation steps:

[0080] The bisphenol A epoxy resin and the urea silane coupling agent are mixed and reacted to prepare a reactant A; wherein the structural reaction formula for preparing the modified epoxy resin by reacting the bisphenol A epoxy resin and the urea silane coupling agent is:

[0081]

[0082] In reaction formula (3), n is an integer of 1 to 25, R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight chain or branched chain alkyl group, and m1+m2=3;

[0083] Under the protection of inert gas, an epoxyalkyl acrylate monomer and an initiator are added to the reactant A to prepare a modified epoxy resin; wherein the structural reaction formula for preparing the modified epoxy resin from the reactant A and the epoxyalkyl acrylate monomer is:

[0084]

[0085]

[0086] In reaction formula (4), n is an integer of 1 to 25, R1 is a straight chain or branched chain alkyl group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight chain or branched chain alkyl group, and m1+m2=3; R6 is a C3 or C7 alkylene oxide group, R7 is H or methyl, and R4 includes a group of the following structural formula:

[0087]

[0088] In formula (2), X is an integer of 1 to 3, R5 is H, R6 is a C3 or C7 alkylene oxide, R7 is H or methyl, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

[0089] In the embodiments of the present application, the number average molecular weight of the modified epoxy resin is 900 to 3000. The modified epoxy resin within the above number average molecular weight range can form a comprehensive performance with other components in the coating.

[0090] In the embodiment of the present application, in the method for preparing the modified epoxy resin, the bisphenol A epoxy resin, the urea-based silane coupling agent and the epoxyalkyl acrylate monomer are added in a molar ratio of 1:(1-1.05):(1-3).

[0091] In the embodiments of the present application, the modified epoxy resin has a special molecular structure, that is, its molecular structure contains terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived segments. Among them, the special polyether polyol reacts with diisocyanate and isocyanate siloxane to form a siloxane-terminated prepolymer, and the hydroxyl groups of the siloxane groups in the modified epoxy resin and the prepolymer after hydrolysis can undergo condensation cross-linking reaction with the alkoxy-terminated polyether, and at the same time, the hydroxyl groups after hydrolysis of the siloxane groups and the hydroxyl groups on the concrete base surface condensation reaction improve the adhesion of the coating, so as to greatly improve the adhesion performance of the coating to the concrete base surface, especially the adhesion performance to the wet concrete base surface, thereby improving the adhesion and anti-peeling performance of the coating to the asphalt waterproofing membrane and the concrete base surface. At the same time, the introduced modified epoxy resin, alkoxy-terminated polyether, diisocyanate and isocyanate siloxane and special polyether polyol can undergo cross-linking reaction to generate long molecular chains, thereby improving the adhesion, water resistance, weather resistance and flexibility of the coating film. The terminal epoxy groups in the modified epoxy resin, the epoxy groups on the acrylic epoxy groups, and the epoxy groups in the active plasticizer further achieve cross-linking reactions with the hydrolyzed latent curing agent, which not only enhances the adhesion performance of the coating and the physical properties of the coating film, but also retains the plasticizer molecules in the coating film structure and no longer migrates, thereby solving the plasticizer migration and the compatibility problem of asphalt waterproofing membrane caused by it.

[0092] In some embodiments of the present application, the bisphenol A epoxy resin is selected from bisphenol A epoxy resin E44, bisphenol A epoxy resin E51, bisphenol A epoxy resin 128 or a combination thereof. Bisphenol A epoxy resin has high strength and bonding properties, as well as good chemical resistance, and can improve the bonding properties, anti-peeling properties and weather resistance of the silane-modified polyether waterproof coating. At least the above-mentioned bisphenol A epoxy resin purchased from Baling Petrochemical can be selected.

[0093] In some embodiments of the present application, the ureido silane coupling agent is selected from γ-ureidopropyltrimethoxysilane, γ-ureidopropyltriethoxysilane, 3-(diisopropylureidopropyl)triethoxysilane or a combination thereof.

[0094] In some embodiments of the present application, the initiator is selected from benzoyl peroxide, dibenzoyl peroxide, tert-butyl perbenzoate, tert-amyl peroxy-2-ethylhexyl ester, 1,1-bis(tert-amylperoxy)cyclohexane, or a combination thereof.

[0095] In some embodiments of the present application, the epoxyalkyl acrylate monomer is selected from 2,3-epoxypropyl acrylate, glycidyl methacrylate, 3,4-epoxycyclohexyl methyl methacrylate, 3,4-epoxycyclohexyl methacrylate or a combination thereof.

[0096] For example, in some embodiments, the molar ratio of reactant A to 2,3-epoxypropyl acrylate, reactant A to glycidyl methacrylate, or reactant A to 3,4-epoxycyclohexyl methyl methacrylate, or reactant A to 3,4-epoxycyclohexyl methacrylate, or reactant A to glycidyl methacrylate and 3,4-epoxycyclohexyl methyl methacrylate can be 1: (1-3). For example, the molar ratio of reactant A to epoxyalkyl acrylate monomer is 1: 1.2, 1: 1.5, 1: 1.6, 1: 1.75, 1: 2, 1: 2.4, 1: 2.7, 1: 2.8, 1: 2.9, 1: 3.

[0097] In some embodiments of the present application, the inert gas is selected from helium, nitrogen, argon or a combination thereof.

[0098] Exemplarily, the preparation method of the modified epoxy resin includes: adding a calculated amount of dried bisphenol A epoxy resin E44 into a reactor, adding a mixed solvent of n-butanol and N,N-dimethylformamide in a volume ratio of 1:1, wherein the amount of the mixed solvent is 10wt.% to 15wt.% of the total mass of the reaction, stirring until the bisphenol A epoxy resin E44 is completely dissolved, controlling the temperature of the feed liquid to 45°C to 50°C, and obtaining a dispersion of the bisphenol A epoxy resin E44; dropping a calculated amount of urea-based silane coupling agent into the dispersion of the bisphenol A epoxy resin E44 in the reactor, and reacting at a constant temperature for 2 hours to 3 hours under a nitrogen protective atmosphere to obtain a reactant A; and the reaction shown in reaction formula (3) occurs:

[0099]

[0100] The reactant A is continuously stirred under nitrogen protection to make the material temperature of the reactant A 80°C to 85°C; then the calculated amount of glycidyl methacrylate and benzoyl peroxide are added to the reactant A in the reactor, and the amount of benzoyl peroxide added is 0.3wt.% to 0.5wt.% of the total mass of the reaction; the stirring is continued and the temperature is increased to 90°C to 95°C, and the reaction is carried out at a constant temperature for 6 hours to 7 hours; then the product is evacuated and distilled under reduced pressure for 0.5 hour to 1 hour to obtain a modified epoxy resin; the reaction shown in reaction formula (5) occurs:

[0101]

[0102]

[0103] In the above reaction formulas (3) and (5), n is an integer of 1 to 25, X is an integer of 1 to 3; R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight chain or branched chain alkyl group, and m1+m2=3; R4 includes a group having the following structural formula:

[0104]

[0105] In formula (2-b), X is an integer of 1 to 3, R5 is H, Indicates the position where R4 is connected to the molecular chain skeleton of the modified epoxy resin. The bisphenol A epoxy resin E44, the urea-based silane coupling agent and glycidyl methacrylate are added in a molar ratio of (1-1.05):1:(1-3).

[0106] It is understandable that similar reactions can occur when glycidyl methacrylate is replaced by 2,3-epoxypropyl acrylate or 3,4-epoxycyclohexyl methyl methacrylate or 3,4-epoxycyclohexyl methacrylate, or by glycidyl methacrylate and 3,4-epoxycyclohexyl methyl methacrylate, or by 2,3-epoxypropyl acrylate and 3,4-epoxycyclohexyl methyl methacrylate. Correspondingly, glycidyl methacrylate in reaction formula (5) is replaced by 3,4-epoxycyclohexyl methyl methacrylate shown in the following formula (6):

[0107]

[0108] R4 is a group including the following structural formula:

[0109]

[0110] In formula (2-d), X is an integer of 1 to 3, R5 is H, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

[0111] In some embodiments of the present application, the latent curing agent is selected from aldimines, ketimines, oxazolidines or a combination thereof.

[0112] In some embodiments of the present application, the latent curing agent is selected from XY-401, YRLH-1106, JW505 or a combination thereof.

[0113] In some embodiments of the present application, the water scavenger is selected from vinyl trimethoxy silane, vinyl triacetoxy silane, vinyl triethoxy silane or a combination thereof.

[0114] In some embodiments of the present application, the accelerator is selected from triacetoxyethylsilane, vinyltriacetoxysilane, diethyldiacetoxysilane or a combination thereof.

[0115] In some embodiments of the present application, the catalyst is selected from dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, a chelated tin catalyst or a combination thereof.

[0116] In some embodiments of the present application, the chelated tin catalyst is selected from U-220H, WCAT-NS01, SG-U303 or a combination thereof.

[0117] In the second aspect, the present application provides a method for preparing a silane-modified polyether waterproof coating, comprising: dispersing Wacker alkoxy-terminated polyether, alkoxy-terminated polyether, special polyether polyol, and active plasticizer to obtain a first dispersed slurry; heating the first dispersed slurry to 90°C to 100°C and adding pigments and fillers for dispersion treatment to obtain a second dispersed slurry; heating the second dispersed slurry to 100°C to 110°C, vacuuming and dehydrating to obtain a dehydrated product; cooling the dehydrated product to 85°C to 90°C; and ℃, add isocyanate siloxane and diisocyanate to react under the protection of inert gas to obtain a first reaction product; cool the first reaction product to 60℃~70℃, add modified epoxy resin and latent curing agent to carry out vacuum dispersion treatment to obtain a first modified product; cool the first modified product to 50℃~60℃, add dehydrating agent and accelerator to carry out vacuum dispersion treatment to obtain a second modified product; add a catalyst to the second modified product to carry out vacuum dispersion treatment to obtain a silane-modified polyether waterproof coating.

[0118] The preparation method of the silane-modified polyether waterproof coating of the embodiment of the present application is to first disperse the Wacker silane-modified polyether, the silane-modified polyether, the epoxy active plasticizer and the pigment filler to obtain a second dispersed slurry in which each substance is evenly dispersed, and then introduce a latent curing agent and a homemade modified epoxy resin, and utilize the special molecular structure in the modified epoxy resin to improve the adhesion and anti-peeling performance of the waterproof roll. Among them, after the alkoxysilane group in the modified epoxy resin molecule is hydrolyzed, it can undergo a condensation cross-linking reaction with the alkoxy-terminated polyether. The introduction of the modified epoxy resin improves the adhesion, water resistance, heat resistance, weather resistance and flexibility of the coating film. At the same time, the hydroxyl groups after the hydrolysis of the alkoxysilane group react with the hydroxyl groups on the base surface to improve the adhesion, which can greatly improve the bonding performance with the concrete base surface, especially the wet concrete base surface. In addition, the epoxy groups in the modified epoxy resin molecules and the epoxy groups in the epoxy plasticizer further react with the latent curing agent after hydrolysis to give full play to the excellent adhesiveness of the epoxy resin, improve the bonding strength of the coating, and make the coating free of free plasticizer molecules after curing, thereby solving the problem of plasticizer migration and its compatibility with waterproof coiled materials. Finally, a desiccant, an accelerator and a catalyst are added to crosslink the coating components to obtain a silane-modified polyether waterproof coating. The silane-modified polyether waterproof coating of the embodiment of the present application does not generate bubbles during the curing process and is almost unaffected by the construction temperature and humidity.

[0119] In some embodiments of the present application, Wacker alkoxy-terminated polyether, K-type alkoxy-terminated polyether, special polyether polyol, active plasticizer, and pigment and filler are dispersed to prepare a second dispersed slurry, including: dispersing Wacker alkoxy-terminated polyether, K-type alkoxy-terminated polyether, special polyether polyol, and active plasticizer to prepare a first dispersed slurry; heating the first dispersed slurry to 90° C. to 100° C. and adding pigments and fillers for dispersion to prepare a second dispersed slurry.

[0120] In some embodiments of the present application, the method for preparing the silane-modified polyether waterproof coating further includes: cooling the silane-modified polyether waterproof coating to ≤50°C and filling it with nitrogen for protection.

[0121] Exemplarily, the preparation method of the silane-modified polyether waterproof coating includes: adding Wacker alkoxy-terminated polyether, alkoxy-terminated polyether, special polyether polyol, and active plasticizer into a reactor for dispersion treatment to obtain a first dispersion slurry; heating the first dispersion slurry to 90° C. to 100° C. and adding pigments and fillers for dispersion treatment to obtain a second dispersion slurry; heating the second dispersion slurry to 100° C. to 110° C., vacuuming and dehydrating for 3 to 4 hours to obtain a dehydrated product; cooling the dehydrated product to 60° C. ℃~70℃, add modified epoxy resin and latent curing agent for vacuum dispersion treatment for 0.5 hour to 1 hour to obtain a first modified product; cool the first modified product to 50℃~60℃, add desiccant and accelerator for vacuum dispersion treatment for 0.5 hour to 1 hour to obtain a second modified product; add catalyst to the second modified product for vacuum dispersion treatment for 0.5 hour to 1 hour, cool the product to ≤50℃, fill with nitrogen for protection, and obtain the silane-modified polyether waterproof coating.

[0122] In a third aspect, an embodiment of the present application provides a use of a modified epoxy resin for preparing a silane-modified polyether waterproof coating, wherein the modified epoxy resin contains terminal epoxy groups, alkoxysilane groups, and epoxyalkyl acrylate monomer derived segments. An appropriate amount of the modified epoxy resin prepared by the aforementioned modified epoxy resin preparation method of the present application can be added to the silane-modified polyether waterproof coating.

[0123] Test Section

[0124] The sources of the raw materials used in the following examples are as follows: bisphenol A epoxy resin E44, purchased from Baling Petrochemical; Wacker alkoxy-terminated polyether: STP-E35, purchased from Wacker Chemical (China) Co., Ltd.; Zhonghua alkoxy-terminated polyether: SAX750, purchased from Zhonghua Trading (Shanghai) Co., Ltd.; catalyst: SG-U303, purchased from Guangzhou Jianyi Chemical Import and Export Co., Ltd. Aldimine type latent curing agent XY-401, purchased from Suzhou Xiangyuan New Materials Co., Ltd.; urea-based silane coupling agent, γ-urea-based propyltrimethoxysilane. Other raw materials not specifically stated are all common commercially available products, or are raw materials prepared by the applicant.

[0125] Preparation of modified epoxy resin

[0126] Preparation Example 1

[0127] The modified epoxy resin (N1) is prepared by the following steps:

[0128] A calculated amount of dried bisphenol A epoxy resin E44 is put into a reactor, and a mixed solvent of n-butanol and N,N-dimethylformamide in a volume ratio of 1:1 is added, and the amount of the mixed solvent is 12wt.% of the total mass of the reaction; stirring is started until the bisphenol A epoxy resin E44 is completely dissolved, and the temperature of the feed liquid is controlled at 45°C to 50°C to obtain a dispersion of bisphenol A epoxy resin E44; a calculated amount of urea-based silane coupling agent is added dropwise to the dispersion of bisphenol A epoxy resin E44 in the reactor, and the mixture is stirred under nitrogen. The reaction was carried out at a constant temperature for 3 hours under a protective atmosphere to obtain a reactant A; the reactant A was continuously stirred under nitrogen protection to make the material temperature of the reactant A 80°C to 85°C; then a calculated amount of glycidyl methacrylate and benzoyl peroxide were added to the reactant A in the reactor, and the amount of benzoyl peroxide added was 0.3wt.% of the total mass of the reaction; the stirring was continued and the temperature was raised to 90°C to 95°C and the reaction was carried out at a constant temperature for 6 hours; then the product was evacuated and distilled under reduced pressure for 1 hour to obtain a modified epoxy resin, which was recorded as N1. Among them, the bisphenol A type epoxy resin E44, the urea silane coupling agent and glycidyl methacrylate were added in a molar ratio of 1:1.02:1, and the epoxy equivalent of the modified epoxy resin (N1) was 407g / mol.

[0129] Preparation Example 2

[0130] The preparation method of the modified epoxy resin (N2) is different from the preparation method of Preparation Example 1 only in that bisphenol A epoxy resin E44, urea-based silane coupling agent and glycidyl methacrylate are added in a molar ratio of 1:1.02:2, and the prepared modified epoxy resin is recorded as N2. The epoxy equivalent of the modified epoxy resin (N2) is 318 g / mol.

[0131] Preparation Example 3

[0132] The preparation method of the modified epoxy resin (N3) is different from the preparation method of Preparation Example 1 only in that: bisphenol A type epoxy resin E44, urea-based silane coupling agent and glycidyl methacrylate are added in a molar ratio of 1:1.02:3 to obtain a modified epoxy resin, which is recorded as N3. The epoxy equivalent of the modified epoxy resin (N3) is 274 g / mol.

[0133] Comparative Preparation Example 1

[0134] The preparation process of the modified epoxy resin (D1) is different from that of Preparation Example 1 only in that glycidyl methacrylate is not added during the preparation process to obtain a modified epoxy resin, which is denoted as D1. The epoxy equivalent of the modified epoxy resin (D1) is 672 g / mol.

[0135] Comparative Preparation Example 2

[0136] The preparation process of the modified epoxy resin (D2) is different from that of Preparation Example 1 only in that no urea-based silane coupling agent is added during the preparation process to obtain a modified epoxy resin, which is recorded as D2. The epoxy equivalent of the modified epoxy resin (D2) is 197 g / mol.

[0137] Example 1

[0138] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; pigments and fillers, The invention comprises 340 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 8 parts by weight of modified epoxy resin (N1), wherein the modified epoxy resin contains terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived chain segments; 13 parts by weight of aldimine type latent curing agent XY-401; 6 parts by weight of dehydrating agent, vinyl trimethoxy silane; 2 parts by weight of accelerator, triacetoxyethyl silane; and 0.8 parts by weight of chelated tin catalyst SG-U303.

[0139] The preparation method of the silane-modified polyether waterproof coating of the present embodiment includes: dispersing Wacker alkoxy-terminated polyether STP-E35, Kalkonium alkoxy-terminated polyether SAX750, special polyether polyol water-soluble polyether NJ-480S, and active plasticizer epoxy soybean oil to obtain a first dispersed slurry; heating the first dispersed slurry to 90° C. to 100° C. and adding heavy calcium and nano calcium carbonate as pigments and fillers to perform dispersion treatment to obtain a second dispersed slurry; heating the second dispersed slurry to 100° C. to 110° C. and performing vacuum dehydration treatment for 3 hours to obtain a dehydrated product; cooling the dehydrated product to 85° C. to 90° C., adding isocyanate, and performing dehydration treatment on the dehydrated product. The ester siloxane and the diisocyanate react for 3 hours under nitrogen protection to obtain a first reaction product; the first reaction product is cooled to 60°C-70°C, and a modified epoxy resin and an aldimine type latent curing agent XY-401 are added to carry out a vacuum dispersion treatment for 0.5 hour to obtain a first modified product; the first modified product is cooled to 50°C-60°C, and a dehydrating agent and an accelerator are added to carry out a vacuum dispersion treatment for 0.5 hour to obtain a second modified product; a catalyst is added to the second modified product to carry out a vacuum dispersion treatment for 0.5 hour, the product is cooled to 40°C, and nitrogen is charged for protection, and the silane-modified polyether waterproof coating is obtained by discharging the material.

[0140] Example 2

[0141] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wackeroxy-terminated polyether STP-E35; 98 parts by weight of alkoxy-terminated polyether SAX750; 20 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of Y-isocyanate propyltrimethoxysilane; 4 parts by weight of toluene diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; and 34 parts by weight of pigments and fillers. 0 parts by weight of heavy calcium and 260 parts by weight of modified heavy calcium; 8 parts by weight of modified epoxy resin (N1), the modified epoxy resin contains terminal epoxy group, alkoxysilane group and epoxyalkyl acrylate monomer derived chain segment; 13 parts by weight of aldimine type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxy silane; 2 parts by weight of accelerator, triacetoxyethyl silane; 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating of this embodiment is the same as that of Example 1.

[0142] Example 3

[0143] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 98 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 20 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 4 parts by weight of toluene diisocyanate; 220 parts by weight of epoxy soybean oil, an active plasticizer; and 34 parts by weight of pigments and fillers. 0 parts by weight of heavy calcium and 260 parts by weight of modified heavy calcium; 8 parts by weight of modified epoxy resin (N1), the modified epoxy resin contains terminal epoxy group, alkoxysilane group and epoxyalkyl acrylate monomer derived chain segment; 11 parts by weight of aldimine type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxy silane; 2 parts by weight of accelerator, triacetoxyethyl silane; 0.6 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating of this embodiment is the same as that of Example 1.

[0144] Example 4

[0145] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; 500 parts by weight of pigments and fillers; The invention discloses a novel silane-modified polyether waterproof coating according to the present invention, wherein the silane-modified polyether waterproof coating comprises 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 10 parts by weight of modified epoxy resin (N1), wherein the modified epoxy resin is a monomer derived chain segment containing terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate; 13 parts by weight of aldimine-type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; and 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating according to the present embodiment is the same as that of the embodiment 1.

[0146] Example 5

[0147] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; 500 parts by weight of pigments and fillers; The invention discloses a novel silane-modified polyether waterproof coating according to the present invention, wherein the silane-modified polyether waterproof coating comprises 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 12 parts by weight of modified epoxy resin (N1), wherein the modified epoxy resin is a monomer derived chain segment containing terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate; 13 parts by weight of aldimine-type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; and 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating according to the present embodiment is the same as that of the embodiment 1.

[0148] Example 6

[0149] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; 500 parts by weight of pigments and fillers; The invention discloses a novel silane-modified polyether waterproof coating according to the present invention, wherein the silane-modified polyether waterproof coating comprises 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 8 parts by weight of modified epoxy resin (N2); the modified epoxy resin is a monomer derived chain segment containing terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate; 13 parts by weight of aldimine-type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; and 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating according to the present embodiment is the same as that of the embodiment 1.

[0150] Example 7

[0151] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; 500 parts by weight of pigments and fillers; The invention discloses a novel silane-modified polyether waterproof coating according to the present invention, wherein the silane-modified polyether waterproof coating comprises 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 8 parts by weight of modified epoxy resin (N3); the modified epoxy resin is a monomer derived chain segment containing terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate; 13 parts by weight of aldimine-type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; and 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating in this embodiment is the same as that in Example 1.

[0152] Example 8

[0153] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 32 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; and pigments and fillers. 500 parts by weight, including 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 8 parts by weight of modified epoxy resin (N1), containing terminal epoxy group, alkoxysilane group and epoxyalkyl acrylate monomer derived chain segment; 13 parts by weight of aldimine type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating of this embodiment is the same as that of embodiment 1.

[0154] Example 9

[0155] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 5 parts by weight of γ-isocyanate propyltrimethoxysilane; 7 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; pigments and fillers, 500 parts by weight, including 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 8 parts by weight of modified epoxy resin (N1), containing terminal epoxy group, alkoxysilane group and epoxyalkyl acrylate monomer derived chain segment; 13 parts by weight of aldimine type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating of this embodiment is the same as that of embodiment 1.

[0156] Example 10

[0157] A silane-modified polyether waterproof coating comprises the following components calculated by weight: 100 parts by weight of Wacker alkoxy-terminated polyether STP-E35; 88 parts by weight of Kalkan alkoxy-terminated polyether SAX750; 30 parts by weight of water-soluble polyether NJ-480S; 3 parts by weight of γ-isocyanate propyltrimethoxysilane; 8 parts by weight of diphenylmethane-4,4'-diisocyanate; 224 parts by weight of epoxy soybean oil, an active plasticizer; pigments and fillers, 500 parts by weight, including 240 parts by weight of heavy calcium and 260 parts by weight of nano calcium carbonate; 8 parts by weight of modified epoxy resin (N1), containing terminal epoxy group, alkoxysilane group and epoxyalkyl acrylate monomer derived chain segment; 13 parts by weight of aldimine type latent curing agent XY-401; 6 parts by weight of dewatering agent, vinyl trimethoxysilane; 2 parts by weight of accelerator, triacetoxyethyl silane; 0.8 parts by weight of chelated tin catalyst SG-U303. The preparation method of the silane-modified polyether waterproof coating of this embodiment is the same as that of Example 1.

[0158] Comparative Example 1

[0159] A silane-modified polyether waterproof coating, the composition and preparation process of which are different from those of Example 1 in that the water-soluble polyether NJ-480S in Example 1 is not included, and SAX750 of the same weight portion is used instead.

[0160] Comparative Example 2

[0161] A silane-modified polyether waterproof coating, the composition and preparation process of which are different from those of Example 1 in that the epoxy soybean oil in Example 1 is not included, and the same weight proportion of common plasticizer dibutyl phthalate is used instead.

[0162] Comparative Example 3

[0163] A silane-modified polyether waterproof coating, the composition and preparation process of which are different from those of Example 1 in that the modified epoxy resin in Example 1 is not included, and an aldimine curing agent XY-401 of the same weight proportion is used instead.

[0164] Comparative Example 4

[0165] A silane-modified polyether waterproof coating, the composition and preparation process of which are different from those of Example 1 in that the water-soluble polyether NJ-480S and modified epoxy resin in Example 1 are not included, and the same weight parts of SAX750 and aldimine curing agent XY-401 are used instead.

[0166] Comparative Example 5

[0167] A silane-modified polyether waterproof coating, the composition and preparation process of which are different from those of Example 1 in that the modified epoxy resin 1 in Example 1 is replaced by modified epoxy resin D1.

[0168] Comparative Example 6

[0169] A silane-modified polyether waterproof coating, the composition and preparation process of which are different from those of Example 1 in that the modified epoxy resin 1 in Example 1 is replaced by modified epoxy resin D2.

[0170] Performance Testing

[0171] The performance of the silane-modified polyether waterproof coatings prepared in Examples 1-10 and Comparative Examples 1-6 was tested, and the test items and methods were as follows:

[0172] 1. Performance test of silane-modified polyether waterproof coating film

[0173] The performance test of the silane-modified polyether waterproof coating film is carried out in accordance with JC / T2435-2018. Among them, t1 represents the surface drying time (h), t2 represents the actual drying time (h), T L represents the tensile strength of the coating (MPa), E represents the elongation at break (%), T s Indicates tear strength (N / mm).

[0174] 2. Composite peeling strength test of asphalt waterproof membrane

[0175] The silane-modified polyether waterproof coatings prepared in Examples 1-10 and Comparative Examples 1-6 were laminated with asphalt waterproofing membrane (Keshun APF-3000) with an isolation membrane, and their 180° peeling strength was tested after lamination. Specifically, the following steps were performed:

[0176] (1) Preparation of test pieces: The silane-modified polyether waterproof coatings prepared in Examples 1-10 and Comparative Examples 1-6 were respectively coated on a concrete base surface with a specification of 400 mm*200 mm*40 mm by cold construction to form a coating layer with a coating thickness of 1.5±0.2 mm; after coating, the isolation film of the asphalt waterproofing membrane was torn off and laid on the coating layer during the adaptation period of the coating, and the asphalt waterproofing membrane and the silane-modified polyether waterproofing membrane were compacted and fully adhered to make the asphalt waterproofing membrane and the silane-modified polyether waterproofing membrane in a fully adhered state; after curing for 168 hours, the asphalt waterproofing membrane was cut to obtain test pieces, and the preset size of the bonding surface was kept at 70*50 mm; the peel strength of the test piece at 180° (i.e., the composite peel strength of the coating film and the waterproofing membrane, represented by σ, in units of N / mm) was measured.

[0177] (2) Test method: Install the cement mortar block surface in the test pieces corresponding to Examples 1-10 and Comparative Examples 1-6 in the fixture at one end of the electronic tensile testing machine, and bend the unbonded surface of the cut asphalt waterproofing membrane in the test piece opposite to the bonding surface by 180° and clamp it in the fixture at the other end of the electronic tensile testing machine. Pay attention to accurately position the test piece of the chuck to ensure that the applied tension is evenly distributed over the width of the test piece. Start the testing equipment and set the tensile speed to 100 mm / min.

[0178] 3. Wet base surface bonding strength test

[0179] According to GB / T16777-2008, the bonding strength of silane-modified polyether waterproof coating on the base surface and on the wet base surface is tested. a Indicates bonding strength (Mpa), σ b Indicates the bonding strength of the wet base surface (Mpa).

[0180] 4. Volatile organic compound content (VOC) test

[0181] It is carried out according to the reactive waterproof coating in JC 1066-2008, where VOC represents the volatile organic compound content, and the unit is: g / L.

[0182] The test results of the above performance test are recorded in the following Table 1:

[0183]

[0184] After the coating formed by the silane-modified polyether waterproof coating of the present application is bonded to the asphalt waterproof membrane, the asphalt waterproof membrane layer shows cohesive failure, indicating that the interfacial bonding force between the coating and the asphalt waterproof membrane is greater than the cohesive strength of the asphalt waterproof membrane material body, and the interfacial failure indicates that the interfacial bonding force between the coating and the asphalt waterproof membrane is less than the cohesive strength of the coating and the asphalt waterproof membrane material bodies respectively.

[0185] The low composite peel strength and cohesive failure of the coating and asphalt waterproofing membrane indicate that the plasticizer or solvent in the coating may have migrated into the asphalt layer of the asphalt waterproofing membrane, causing the asphalt layer to soften and swell, and fail to wet the concrete base well, resulting in low peel strength and decreased cohesion.

[0186] By comparing the composition ratios of the silane-modified polyether waterproof coatings of Examples 1-10 and Comparative Examples 1-6 and the test results in Table 1, it can be seen that the bonding strength (σ a ), bonding strength to wet concrete surface (σ b), composite peeling strength (σ) with asphalt waterproofing membrane, peeling failure form and other performances are more excellent; the bonding performance of the silane-modified polyether waterproof coating and the composite peeling strength with asphalt waterproofing membrane in Comparative Examples 1 to 6 are significantly lower than the bonding performance of the silane-modified polyether waterproof coating and the composite peeling strength of the silane-modified polyether waterproof coating and asphalt waterproofing membrane in Examples 1 to 10.

[0187] It can be clearly seen from the test data of the composite peel strength (σ) of the silane-modified polyether waterproof coating and the asphalt waterproof membrane of Examples 1-10 and Comparative Examples 1-6 and the failure form that the use and increase of the water-soluble polyether NJ-480S in the silane-modified polyether waterproof coating of Examples 1 and 8 can significantly improve the bonding performance to the wet concrete substrate, and the joint use of the active plasticizer with epoxy groups, the modified epoxy resin and the diisocyanate in the silane-modified polyether waterproof coating of Examples 1-10 improves the bonding performance of the silane-modified polyether waterproof coating to the asphalt waterproof membrane, and also improves the bonding performance of the silane-modified polyether waterproof coating to the concrete substrate, especially improves the bonding performance of the silane-modified polyether waterproof coating to the wet concrete substrate.

[0188] By comparing the test results of Example 1, Example 4 and Example 5, it can be concluded that increasing the amount of modified epoxy resin will lead to a certain degree of improvement in the tensile strength, bonding performance and peeling performance of the coating with asphalt waterproofing membrane, but will lead to a certain degree of decrease in elongation at break. It can be seen from Example 1, Example 6 and Example 7 that with the increase of glycidyl methacrylate in the modified epoxy resin, the tensile strength of the silane-modified polyether waterproof coating gradually increases, the elongation at break gradually decreases, and the change in the bonding and peeling performance is not obvious.

[0189] By comparing the test results of Example 1 and Example 8, it can be concluded that as the amount of water-soluble polyether NJ-480S is increased, the bonding performance of the silane-modified polyether waterproof coating to the wet concrete base surface is gradually improved, but the tensile strength decreases to a certain extent.

[0190] From the test results of Example 1 and Example 9, it can be concluded that by increasing the amount of isocyanate siloxane, that is, increasing the amount of γ-isocyanate propyltrimethoxysilane, the bonding strength of the silane-modified polyether waterproof coating gradually increases, but the elongation at break decreases.

[0191] From the test results of Example 1 and Example 10, it can be concluded that by increasing the amount of diisocyanate, that is, increasing the amount of diphenylmethane-4,4'-diisocyanate, the tensile strength of the silane-modified polyether waterproof coating gradually increases, the surface drying time and the actual drying time are shortened, but the elongation at break decreases, and other properties change little.

[0192] In addition, compared with the VOC volatilization of 4g / L to 15g / L in Comparative Examples 1-6, the silane-modified polyether waterproof coating of Examples 1-10 of the present application effectively shortens the surface drying time to less than 0.8h, and shortens the actual drying time to less than 2.1h, and reduces the amount of VOC to less than 4g / L, significantly reducing the amount of VOC volatilization.

[0193] The above is only a specific implementation method of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A silane-modified polyether waterproof coating, characterized in that: The composition comprises the following components calculated by weight: Wacker alkoxy-terminated polyether, 100 parts by weight; 86 to 120 parts by weight of potassium hydroxide alkoxy terminated polyether; Special polyether polyol, 18 to 32 parts by weight; Isocyanate siloxane, 2 to 5 parts by weight; Diisocyanate, 5 to 8 parts by weight; Active plasticizer, 180-250 parts by weight; Pigments and fillers, 340-650 parts by weight; Modified epoxy resin, 5 to 13 parts by weight; the modified epoxy resin contains terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived segments; Latent curing agent, 4 to 16 parts by weight; Water removal agent, 4 to 10 parts by weight; Accelerator, 1 to 3 parts by weight; Catalyst, 0.6 to 2.3 parts by weight.

2. The silane-modified polyether waterproof coating according to claim 1, characterized in that: The modified epoxy resin comprises a structure shown in formula (1): In formula (1), n ​​is an integer of 1 to 25; R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms; R2 is a C1-C3 alkyl group; R3 is a C1-C3 straight chain or branched chain alkyl group; m1+m2=3; and R4 includes a group of the following structural formula:

3. The silane-modified polyether waterproof coating according to claim 2, characterized in that: Meet any of the following requirements: In formula (1), n ​​is an integer of 1 to 2; R1 is a propylene group, R2 is a methyl group, and R3 is a methyl group or an ethyl group; In formula (2), R4 is a structure represented by any one of formulas (2-a) to (2-d): In formula (2-a) to formula (2-d), R5 is H, X is an integer of 1 to 3, It indicates the position where R4 is connected to the molecular chain backbone of the modified epoxy resin.

4. The silane-modified polyether waterproof coating according to claim 2 or 3, characterized in that: The modified epoxy resin is prepared by the following preparation steps: A bisphenol A epoxy resin and a urea-based silane coupling agent are mixed and reacted to prepare a reactant A; wherein the reaction formula (3) for preparing a modified epoxy resin by reacting the bisphenol A epoxy resin and the urea-based silane coupling agent is: In reaction formula (3), n is an integer of 1 to 25, R1 is a straight chain alkylene group or a branched chain alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight chain or branched chain alkyl group, and m1+m2=3; Under the protection of inert gas, an acrylate epoxy alkyl ester monomer and an initiator are added to the reactant A to prepare a modified epoxy resin; wherein the reaction formula (4) for preparing the modified epoxy resin from the reactant A and the acrylate epoxy alkyl ester monomer is: In reaction formula (4), n is an integer of 1 to 25, R1 is a straight or branched alkylene group having not less than 2 carbon atoms, R2 is a C1-C3 alkyl group, R3 is a C1-C3 straight or branched alkyl group, and m1+m2=3; R6 is a C3 or C7 alkylene oxide group, R7 is H or methyl, and R4 includes a group of the following structural formula:

5. The silane-modified polyether waterproof coating according to claim 4, characterized in that: Meet at least one of the following requirements: The bisphenol A epoxy resin is selected from bisphenol A epoxy resin E44, bisphenol A epoxy resin E51, bisphenol A epoxy resin 128 or a combination thereof; The urea-based silane coupling agent is selected from γ-urea-based propyl trimethoxysilane, γ-urea-based propyl triethoxysilane, 3-(diisopropylurea-based propyl) triethoxysilane or a combination thereof; The initiator is selected from benzoyl peroxide, dibenzoyl peroxide, tert-butyl perbenzoate, tert-amyl peroxy-2-ethylhexyl ester, 1,1-bis(tert-amylperoxy)cyclohexane or a combination thereof; The bisphenol A epoxy resin, the urea-based silane coupling agent and the epoxyalkyl acrylate monomer are added in a molar ratio of 1: (1-1.05): (1-3); The epoxyalkyl acrylate monomer is selected from 2,3-epoxypropyl acrylate, glycidyl methacrylate, 3,4-epoxycyclohexyl methyl methacrylate, 3,4-epoxycyclohexyl methacrylate or a combination thereof.

6. The silane-modified polyether waterproof coating according to claim 1, characterized in that: Meet at least one of the following requirements: The epoxy equivalent of the modified epoxy resin is 260 g / mol to 430 g / mol; The Wacker alkoxy-terminated polyether is selected from STP-E35, STP-E30, STP-E15 and STP-E10 or a combination thereof; The potassium alkoxy terminated polyether is selected from SAX227, SAX327, SAX220 and SAX750 or a combination thereof; The special polyether polyol is selected from water-soluble polyether NJ-480S, NJ-2442 or a combination thereof; The isocyanate siloxane is selected from γ-isocyanate propyl trimethoxy silane, γ-isocyanate propyl triethoxy silane, isocyanate methyl trimethoxy silane or a combination thereof; The diisocyanate is selected from aromatic diisocyanate, aliphatic diisocyanate or a combination thereof; The active plasticizer is selected from epoxidized soybean oil, epoxidized linseed oil, epoxidized cottonseed oil, epoxidized rice bran oil, epoxidized sunflower oil or a combination thereof; The pigment filler is selected from fumed silica, nano calcium carbonate, heavy calcium carbonate, modified heavy calcium carbonate, nano clay, carbon black, modified clay or a combination thereof; The latent curing agent is selected from aldimines, ketimines, oxazolidines or a combination thereof; The dewatering agent is selected from vinyl trimethoxy silane, vinyl triacetoxy silane, vinyl triethoxy silane or a combination thereof; The accelerator is selected from triacetoxyethylsilane, vinyl triacetoxysilane, diethyl diacetoxysilane or a combination thereof; The catalyst is selected from dibutyltin dilaurate, stannous octoate, dibutyltin diacetate, chelated tin catalyst or a combination thereof.

7. The silane-modified polyether waterproof coating according to claim 6, characterized in that: Meet at least one of the following requirements: The diisocyanate is selected from toluene diisocyanate, diphenylmethane-4,4'-diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate, xylylene diisocyanate, tetramethyl-m-xylylene diisocyanate or a combination thereof; The latent curing agent is selected from XY-401, YRLH-1106, JW505 or a combination thereof; The chelated tin catalyst is selected from U-220H, WCAT-NS01, SG-U303 or a combination thereof.

8. A method for preparing the silane-modified polyether waterproof coating according to any one of claims 1 to 7, characterized in that: include: Dispersing the Wacker alkoxy-terminated polyether, the potassium-containing alkoxy-terminated polyether, the special polyether polyol, the active plasticizer, and the pigment and filler to obtain a second dispersed slurry; The second dispersed slurry is heated to 100° C. to 110° C. and vacuumed to perform dehydration treatment to obtain a dehydrated product; The dehydration product is cooled to 85° C. to 90° C., and the isocyanate siloxane and the diisocyanate are added to react under the protection of an inert gas to obtain a first reaction product; The first reaction product is cooled to 60° C. to 70° C., and a modified epoxy resin and a latent curing agent are added to perform vacuum dispersion treatment to obtain a first modified product; The first modified product is cooled to 50° C. to 60° C., a dehydrating agent and an accelerator are added to perform vacuum dispersion treatment to obtain a second modified product; A catalyst is added to the second modified product to react to obtain a silane-modified polyether waterproof coating.

9. The method for preparing the silane-modified polyether waterproof coating according to claim 8, characterized in that: The Wacker alkoxy-terminated polyether, the potassium-containing alkoxy-terminated polyether, the special polyether polyol, the active plasticizer, and the pigment and filler are dispersed to prepare the second dispersed slurry, which includes: Dispersing the Wacker alkoxy-terminated polyether, the K-type alkoxy-terminated polyether, the special polyether polyol, and the active plasticizer to obtain a first dispersed slurry; The first dispersed slurry is heated to 90° C. to 100° C. and the pigment and filler are added for dispersion treatment to obtain a second dispersed slurry.

10. A use of a modified epoxy resin for preparing a silane-modified polyether waterproof coating, wherein: The modified epoxy resin contains terminal epoxy groups, alkoxysilane groups and epoxyalkyl acrylate monomer derived chain segments.

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