Coating for isolating layer of modified asphalt waterproof coiled material, preparation method and application of coating, composite waterproof coiled material and preparation method of composite waterproof coiled material

Abstract

The invention discloses a coating for an isolating layer of a modified asphalt waterproof coiled material, a preparation method and application of the coating, a composite waterproof coiled material and a preparation method of the composite waterproof coiled material. The coating is prepared from the following raw materials: emulsified asphalt, water, an emulsion, an anti-sticking agent, a pH regulator, a defoaming agent, a stabilizer, a curing agent, titanium dioxide and filler. According to the invention, the anti-sticking coating is prepared on the surface of the modified asphalt layer to replace a traditional isolation material, and the coating can be completely stuck with the modified asphalt coating and can also be compounded with a polymer coating and a polyurethane coating for use; in addition, the coating for the isolating layer also has good low-temperature performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of waterproofing coiled materials, and more specifically, relates to a coating for an isolation layer of a modified asphalt waterproofing coiled material, a preparation method and application thereof, and a composite waterproofing coiled material and a preparation method thereof. Background Art

[0002] In order to improve the use function and building life of buildings and municipal engineering, the Ministry of Housing and Urban-Rural Development issued the mandatory engineering construction specification "General Specification for Waterproofing of Buildings and Municipal Engineering". It is a bottom-line requirement for controlling the safety of people's lives and property, engineering safety, ecological environment safety, promoting energy and resource conservation and utilization, and meeting economic and social management. The general specification has stricter requirements on the waterproof level of the main structure, roof, and underground. Both the first and second waterproof levels require multiple waterproof levels to protect the building in coordination, and at least one waterproof membrane is required. This means that the waterproof coating-waterproof membrane composite system will become the mainstream of the waterproof market.

[0003] Modified asphalt waterproofing membrane is the most commonly used waterproofing material in the field of construction engineering, and its waterproofing effect has been widely recognized. However, the upper and lower surface membranes or self-adhesive layers of modified asphalt waterproofing membrane can only be well combined with asphalt coating systems, and have poor combination with polymer coatings, polyurethane coatings and other systems, which seriously limits its application in waterproof coating-waterproofing membrane construction systems. In addition, the surface isolation material of modified asphalt waterproofing membrane also has disadvantages such as easy cracking at low temperatures. Summary of the invention

[0004] The purpose of the present invention is to provide a coating for the isolation layer of a modified asphalt waterproofing coiled material, a preparation method and application thereof, and a composite waterproofing coiled material and a preparation method thereof; the present invention replaces the traditional isolation material by preparing an anti-stick coating on the surface of the modified asphalt layer, and the coating can be completely adhered to the modified asphalt coating and can also be used in combination with polymer coatings and polyurethane coatings; and the coating for the isolation layer of the present invention also has good low-temperature performance.

[0005] In order to achieve the above-mentioned purpose, one aspect of the present invention provides a coating for the isolation layer of a modified asphalt waterproof membrane. The raw materials for preparing the coating include: emulsified asphalt, water, emulsion, anti-sticking agent, pH regulator, defoaming agent, stabilizer, curing agent, titanium dioxide and filler.

[0006] According to the present invention, preferably, the raw materials for preparing the coating include, by weight: 10-20 parts of emulsified asphalt, 10-20 parts of water, 55-65 parts of emulsion, 5-8 parts of anti-sticking agent, 1-2 parts of pH regulator, 0.5-1 part of defoaming agent, 0.5-1 part of stabilizer, 2-4 parts of curing agent, 3-5 parts of titanium dioxide and 10-15 parts of filler.

[0007] In the present invention, the isolation layer coating of the present invention can wet the surface of the modified asphalt to avoid the shrinkage and agglomeration of the coating; the coating surface energy of the isolation layer coating of the present invention needs to be less than 150N / m, which can prevent the surface of the coating from becoming sticky after film formation and losing the anti-sticking isolation effect.

[0008] According to the present invention, preferably, the emulsified asphalt is anionic emulsified asphalt.

[0009] In the present invention, the main function of the emulsified asphalt is to enhance the bonding performance between the coating and the modified asphalt coil coating, while providing the coating with mechanical strength and bonding performance with the base layer.

[0010] According to the present invention, preferably, the emulsion is a modified polypropylene wax emulsion.

[0011] In the present invention, the modified polypropylene wax emulsion has a small particle size, can be mixed with various systems, has a good modification effect, and the coating prepared by adding the modified polypropylene wax emulsion has good glossiness and wear resistance.

[0012] According to the present invention, preferably, the anti-sticking agent is at least one of polytetrafluoroethylene, vinylidene fluoride and FEVE resin;

[0013] The curing agent is preferably an acrylic silicone resin curing agent.

[0014] In the present invention, the main function of the anti-sticking agent is to reduce the surface energy of the coating and enhance the anti-sticking effect.

[0015] In the present invention, the main function of the curing agent is to accelerate the curing of the coating under ultraviolet light conditions.

[0016] According to the present invention, preferably, the pH regulator is 2-amino-2-methyl-1-propanol;

[0017] The defoaming agent is hydroxyethyl cellulose;

[0018] The stabilizer is hydroxyethyl cellulose ether;

[0019] The titanium dioxide is diamond red type titanium dioxide;

[0020] The filler is at least one of heavy calcium, light calcium, talcum powder and stone powder.

[0021] In the present invention, preferably, the average particle size of the titanium dioxide is 50 nm.

[0022] In the present invention, preferably, the specification of the filler is 500 mesh.

[0023] In the present invention, in addition to the above-mentioned 2-amino-2-methyl-1-propanol, other common PH regulators in the art may also be used; the main function of the PH regulator is to adjust the PH and enhance the stability of the emulsified asphalt system. In addition to the above-mentioned hydroxyethyl cellulose defoamer, other common defoamers in the art may also be used; the main function of the defoamer is to defoam, prevent uneven coating during the coating production stage, and prevent voids on the surface of the emulsion. In addition to the above-mentioned hydroxyethyl cellulose ether, other common stabilizers in the art may also be used; the main function of the stabilizer is to enhance the stability of the system, thereby preventing the emulsion from stratifying and separating in the emulsion pool.

[0024] In the present invention, the titanium dioxide can play a protective role, and can enhance the mechanical strength and adhesion of the paint film, prevent cracks, prevent ultraviolet rays and water from penetrating, and extend the life of the paint film.

[0025] The coating for the isolation layer of the modified asphalt waterproof coiled material of the present invention has an extremely fast film-forming speed and can be directly applied to the production line of common modified asphalt coiled materials.

[0026] A second aspect of the present invention provides a method for preparing the above-mentioned coating, the preparation method comprising:

[0027] (1) mixing the emulsion, pH regulator, water and anti-adhesive agent to obtain a first component;

[0028] (2) mixing the filler and titanium dioxide uniformly to obtain a second component;

[0029] (3) uniformly mixing the first component, the second component and the emulsified asphalt to obtain the third component;

[0030] (4) uniformly mixing the third component, the stabilizer and the defoaming agent to obtain a fourth component;

[0031] (5) The fourth component and the curing agent are mixed evenly to obtain the coating for the isolation layer of the modified asphalt waterproof membrane.

[0032] In the present invention, in the preparation method of the above-mentioned coating, preferably, in step (1), the condition for uniform mixing is stirring at 500-800 r / min for 15-20 min; in step (3), the condition for uniform mixing is stirring at 500-800 r / min for 20-40 min; in step (4), the condition for uniform mixing is stirring at 800-1000 r / min for 20-40 min; in step (5), the condition for uniform mixing is stirring at 500-800 r / min for 20-40 min.

[0033] The third aspect of the present invention provides the use of the above-mentioned coating in preparing an isolation layer of a modified asphalt waterproofing membrane.

[0034] A fourth aspect of the present invention provides a composite waterproofing membrane, which comprises in sequence: a first isolation layer, a first modified asphalt waterproofing layer, a reinforcement layer, a second modified asphalt waterproofing layer and a second isolation layer;

[0035] The material of at least one of the first isolation layer and the second isolation layer is the above-mentioned coating;

[0036] Preferably, when only one of the first isolation layer and the second isolation layer is made of the above-mentioned coating, the material of the other isolation layer is PE film, fine sand or mineral granules.

[0037] In the present invention, preferably, the composite waterproof membrane comprises, from top to bottom, in order: a first isolation layer, a first modified asphalt waterproof layer, a reinforcement layer, a second modified asphalt waterproof layer and a second isolation layer.

[0038] In the present invention, the material of the first modified asphalt waterproof layer and the second modified asphalt waterproof layer is any commonly used modified asphalt in the field that can meet the performance requirements of modified asphalt waterproof membranes required by national standards. For example, the present invention can select hot-melt modified asphalt prepared by using base asphalt as raw material and adding a certain proportion of SBS and other additives.

[0039] In the present invention, the reinforcing layer only needs to meet the national standard requirements, for example, 250g / cm 2 Polyester base.

[0040] A fourth aspect of the present invention provides a method for preparing the composite waterproof membrane, the method comprising:

[0041] (1) immersing the dried and pre-impregnated reinforcement layer into a hot-melt modified asphalt pool to form a modified asphalt waterproof layer on the upper and lower surfaces of the reinforcement layer, respectively, and then determining the thickness to obtain a semi-finished product;

[0042] (2) spraying the coating according to any one of claims 1 to 6 on the modified asphalt waterproof layer on at least one side of the semi-finished product;

[0043] (3) When the semi-finished product obtained in step (2) is sprayed with coating on both sides, the semi-finished product obtained in step (2) is subjected to water cooling treatment in sequence, and the spray coating is subjected to UV curing treatment and water cooling treatment simultaneously during the water cooling treatment to obtain the composite waterproof membrane;

[0044] When the semi-finished product obtained in step (2) is sprayed with paint only on the modified asphalt waterproof layer on one side, the semi-finished product obtained in step (2) is sequentially subjected to water cooling treatment only, UV curing treatment of the spray coating during water cooling treatment, and water cooling treatment only; then, a film or sand coating is applied on the modified asphalt waterproof layer on the other side, and finally a cooling treatment is performed to obtain the composite waterproof membrane.

[0045] In the present invention, in the preparation method of the above-mentioned composite waterproof membrane, in step (2), preferably, the surface temperature of the semi-finished product during spraying is 170-180°C; the coating thickness can be customized according to different product application requirements, and it is recommended to be controlled within 0.1mm if there is no special application requirement.

[0046] In step (3), the conventional coil production will be water-cooled through a 5-15 meter water bed or other cooling equipment at this stage. The present invention installs a set of ultraviolet irradiation equipment above and below the middle section of the cooling water bed (the coil temperature in this section is generally maintained at 100-130°C, which can meet the thermal energy conditions of ultraviolet curing) to meet the needs of ultraviolet curing treatment; the semi-finished product after spraying the spray coating is directly passed through the cooling water bed with the added ultraviolet irradiation equipment according to the normal production process. If both sides have been sprayed with coatings, they can be directly passed through the cooling device and then rolled up; if only one side is sprayed, after the coil passes through the cooling device, the other side is coated with film or sand, and then cooled and finally rolled up.

[0047] The technical solution of the present invention has the following beneficial effects:

[0048] (1) The present invention replaces the traditional isolation material by preparing an anti-stick coating on the surface of the modified asphalt layer. The coating can be completely adhered to the modified asphalt coating and can also be used in combination with polymer coatings and polyurethane coatings. The isolation layer coating of the present invention also has good low-temperature performance.

[0049] (2) The coating for the isolation layer of the modified asphalt waterproofing membrane of the present invention has excellent anti-sticking properties and has an excellent isolation effect. At the same time, it is guaranteed not to be sticky under high temperature conditions, is easy to unroll, and does not stick to the feet during the construction process; it has excellent low-temperature performance and is guaranteed not to break under low temperature conditions.

[0050] (3) When the composite waterproofing membrane of the present invention is used in combination with a coating, it can be directly cold-bonded without the need for open flame hot-melt construction, and is safe, reliable, and has low energy consumption.

[0051] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0053] Figure 1 A schematic structural diagram of a composite waterproof membrane according to an embodiment of the present invention is shown.

[0054] Description of reference numerals:

[0055] 1. The first isolation layer, 2. The first modified asphalt waterproof layer, 3. The reinforcement layer, 4. The second modified asphalt waterproof layer, 5. The second isolation layer. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0057] The present invention is further described below by examples:

[0058] In the following embodiments and comparative examples:

[0059] The emulsified asphalt used was anionic emulsified asphalt purchased from Jingbo Petrochemical Company, with a brand number of 70#;

[0060] The emulsion used was a modified polypropylene wax emulsion purchased from Keim-additec with the brand name E-360;

[0061] The polytetrafluoroethylene used was purchased from DuPont, with the brand name PTFE NXT 70;

[0062] The FEVE resin used was HLR-1 from Shandong Huafu Chemical Company;

[0063] The curing agent used was acrylic silicone resin curing agent purchased from Guangzhou Haoyi New Materials Technology Co., Ltd., with the brand name WR-1948;

[0064] The pH regulator used was 2-amino-2-methyl-1-propanol;

[0065] The defoamer used was hydroxyethyl cellulose;

[0066] The stabilizer used was hydroxyethyl cellulose ether;

[0067] The titanium dioxide used is diamond red type titanium dioxide with an average particle size of 50nm;

[0068] The filler used is heavy calcium with a specification of 500 mesh.

[0069] Example 1

[0070] (i) This embodiment provides a coating for an isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 10 parts of emulsified asphalt, 20 parts of deionized water, 61 parts of emulsion, 5 parts of anti-sticking agent, 1 part of pH regulator, 1 part of defoaming agent, 0.5 parts of stabilizer, 4 parts of curing agent, 3 parts of titanium dioxide and 11 parts of filler; wherein the anti-sticking agent is FEVE resin.

[0071] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is as follows:

[0072] a. The emulsion, the pH regulator, water and the anti-adhesive agent were stirred at 600 r / min for 18 min to obtain a first component;

[0073] b. mixing the filler and titanium dioxide uniformly to obtain a second component;

[0074] c. Stir the first component, the second component and the emulsified asphalt at 600 r / min for 30 min to obtain the third component;

[0075] d. Add a stabilizer and a defoamer to the third component and stir at 900 r / min for 30 min to obtain a fourth component;

[0076] e. After adding the curing agent to the fourth component, stir at 600 r / min for 30 min to obtain a coating for the isolation layer of the modified asphalt waterproof membrane.

[0077] (ii) Figure 1 As shown, this embodiment provides a composite waterproofing membrane, which comprises in sequence: a first isolation layer 1, a first modified asphalt waterproofing layer 2, a reinforcement layer 3, a second modified asphalt waterproofing layer 4 and a second isolation layer 5;

[0078] The material of one of the first isolation layer and the second isolation layer is the isolation layer coating of the modified asphalt waterproofing membrane prepared in the above embodiment, and the material of the other isolation layer is a PE film.

[0079] The specific preparation method of the above composite waterproof membrane is as follows:

[0080] (1) The dried and pre-impregnated reinforcing layer is immersed in a hot-melt modified asphalt pool to form a modified asphalt waterproof layer on the upper and lower surfaces of the reinforcing layer, and then the thickness is determined to obtain a semi-finished product; wherein the reinforcing layer is 250g / cm 2 Polyester tire base; in parts by weight, the pre-impregnation oil is composed of 150 parts of 70# asphalt and 50 parts of Hengli solid asphalt; in parts by weight, the hot melt modified asphalt is composed of 50 parts of 70# asphalt, 10 parts of three-line oil, 8 parts of SBS1332, 12 parts of 50-mesh tire rubber powder and 20 parts of 200-mesh talcum powder;

[0081] (2) spraying the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in the present embodiment on the modified asphalt waterproofing layer on one side of the semi-finished product; wherein the surface temperature of the semi-finished product during spraying is 175° C. and the coating thickness is 0.1 mm;

[0082] (3) The semi-finished product obtained in step (2) is subjected to water cooling treatment alone, UV curing treatment of the spray coating during water cooling treatment, and water cooling treatment alone in sequence; then a PE film is coated on the modified asphalt waterproof layer on the other side, and finally water cooling treatment is performed to obtain the composite waterproof membrane. The UV light intensity of the UV curing treatment is 300Mw / cm 2 Specifically, in this stage, the conventional coil production will pass through a water bed of 5 to 15 meters. In this embodiment, a set of ultraviolet irradiation equipment is installed above and below the middle section of the cooling water bed (the coil temperature in this section is generally maintained at 100 to 130°C, which can meet the thermal energy conditions of ultraviolet curing). The semi-finished product obtained in step (2) is directly passed through the cooling water bed with the ultraviolet irradiation equipment added according to the normal production process. Before the PE film is coated on the modified asphalt waterproof layer, when the semi-finished product obtained in step (2) passes through the cooling water bed, only the ultraviolet irradiation equipment on the side where the coating is sprayed is turned on.

[0083] Example 2

[0084] (I) This embodiment provides a coating for an isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 20 parts of emulsified asphalt, 10 parts of deionized water, 55 parts of emulsion, 7 parts of anti-sticking agent, 1 part of pH regulator, 0.5 parts of defoaming agent, 1 part of stabilizer, 3 parts of curing agent, 5 parts of titanium dioxide, and 15 parts of filler; wherein the anti-sticking agent is FEVE resin.

[0085] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is the same as that in Example 1.

[0086] (ii) Figure 1 As shown, the difference between the composite waterproofing membrane of this embodiment and the embodiment 1 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in embodiment 2;

[0087] The preparation method of the composite waterproofing membrane of this embodiment is different from that of Embodiment 1 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Embodiment 2.

[0088] Example 3

[0089] (I) This embodiment provides a coating for an isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 15 parts of emulsified asphalt, 14 parts of deionized water, 65 parts of emulsion, 8 parts of anti-sticking agent, 2 parts of pH regulator, 0.5 parts of defoaming agent, 1 part of stabilizer, 2 parts of curing agent, 4 parts of titanium dioxide, and 14 parts of filler; wherein the anti-sticking agent is polytetrafluoroethylene.

[0090] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is the same as that in Example 1.

[0091] (ii) Figure 1 As shown, the difference between the composite waterproofing membrane of this embodiment and the embodiment 1 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in embodiment 3;

[0092] The preparation method of the composite waterproofing membrane of this embodiment is different from that of Embodiment 1 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Embodiment 3.

[0093] Example 4

[0094] (I) This embodiment provides a coating for an isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 17 parts of emulsified asphalt, 17 parts of deionized water, 65 parts of emulsion, 6 parts of anti-sticking agent, 2 parts of pH regulator, 0.5 parts of defoaming agent, 0.5 parts of stabilizer, 2 parts of curing agent, 3 parts of titanium dioxide, and 10 parts of filler; wherein the anti-sticking agent is polytetrafluoroethylene.

[0095] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is the same as that in Example 1.

[0096] (ii) Figure 1 As shown, the difference between the composite waterproofing membrane of this embodiment and that of embodiment 1 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in embodiment 4;

[0097] The preparation method of the composite waterproofing membrane of this embodiment is different from that of Embodiment 1 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Embodiment 4.

[0098] Comparative Example 1

[0099] (I) This comparative example provides a coating for an isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 10 parts of emulsified asphalt, 20 parts of deionized water, 5 parts of an anti-sticking agent, 1 part of a pH regulator, 1 part of a defoaming agent, 0.5 parts of a stabilizer, 4 parts of a curing agent, 3 parts of titanium dioxide and 11 parts of a filler; wherein the anti-sticking agent is a FEVE resin.

[0100] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is different from that of Example 1 only in that no emulsion is added.

[0101] (ii) The difference between the composite waterproofing membrane of this comparative example and Example 1 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 1;

[0102] The preparation method of the composite waterproofing membrane of this comparative example is different from that of Example 1 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 1.

[0103] Comparative Example 2

[0104] (I) This comparative example provides a coating for an isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 10 parts of emulsified asphalt, 20 parts of deionized water, 61 parts of emulsion, 5 parts of anti-sticking agent, 1 part of pH regulator, 1 part of defoaming agent, 0.5 parts of stabilizer, 3 parts of titanium dioxide and 11 parts of filler; wherein the anti-sticking agent is FEVE resin.

[0105] The preparation method of the coating for the isolation layer of the modified asphalt waterproof membrane is different from that of Example 1 only in that no curing agent is added.

[0106] (ii) The difference between the composite waterproofing membrane of this comparative example and Example 1 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 2;

[0107] The preparation method of the composite waterproofing membrane of this comparative example is different from that of Example 1 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 2.

[0108] Comparative Example 3

[0109] (I) This comparative example provides a coating for the isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 14 parts of deionized water, 65 parts of emulsion, 8 parts of anti-sticking agent, 2 parts of pH regulator, 0.5 parts of defoaming agent, 1 part of stabilizer, 2 parts of curing agent, 4 parts of titanium dioxide, and 14 parts of filler; wherein the anti-sticking agent is polytetrafluoroethylene.

[0110] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is different from that of Example 3 only in that no emulsified asphalt is added.

[0111] (ii) The difference between the composite waterproofing membrane of this comparative example and Example 3 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 3;

[0112] The preparation method of the composite waterproofing membrane of this comparative example is different from that of Example 3 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 3.

[0113] Comparative Example 4

[0114] (I) This comparative example provides a coating for the isolation layer of a modified asphalt waterproofing membrane. The raw materials for preparing the coating include, by weight: 15 parts of emulsified asphalt, 14 parts of deionized water, 65 parts of emulsion, 2 parts of pH regulator, 0.5 parts of defoamer, 1 part of stabilizer, 2 parts of curing agent, 4 parts of titanium dioxide, and 14 parts of filler; wherein the anti-sticking agent is polytetrafluoroethylene.

[0115] The preparation method of the coating for the isolation layer of the modified asphalt waterproofing membrane is different from that of Example 3 only in that no anti-sticking agent is added.

[0116] (ii) The difference between the composite waterproofing membrane of this comparative example and Example 3 is only that the material of the isolation layer made of coating material is the coating material for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 4;

[0117] The preparation method of the composite waterproofing membrane of this comparative example is different from that of Example 3 only in that the coating used for spraying is the coating for the isolation layer of the modified asphalt waterproofing membrane prepared in Comparative Example 4.

[0118] Test Case

[0119] In order to verify the effect of the coating for the isolation layer of the modified asphalt waterproofing membrane, comparative tests were conducted on Examples 1-4 and Comparative Examples 1-4, and the specific results are shown in the following table; wherein, except for the first two items in the table, the other items are tests on the composite waterproofing membrane, the surface energy is tested using the contact angle test method, and the low-temperature cracking temperature and the peeling strength with three different coatings are tested with reference to the GB / T 18242 standard. The curing time is the curing time of the coating for the isolation layer of the modified asphalt waterproofing membrane sprayed when preparing the composite waterproofing membrane; the wetting effect is the wetting effect of the coating for the isolation layer of the modified asphalt waterproofing membrane on the modified asphalt waterproofing layer of the composite waterproofing membrane. In the table, the ordinary asphalt coating used in the test is Oriental Yuhong PBC-328; the polyurethane waterproof coating is Oriental Yuhong SPU-301; and the polymer waterproof coating is Oriental Yuhong DMSC-211.

[0120] Table 1

[0121]

[0122]

[0123] It can be seen from Table 1 that all performance indicators of Examples 1-4 meet the requirements. The main problems of Comparative Example 1 are large surface energy and poor anti-sticking effect, poor low-temperature performance and easy cracking, and low peeling strength with other waterproof coatings; the main problems of Comparative Example 2 are slow curing speed, which does not meet the production process requirements, and poor low-temperature toughness due to low strength; the problem of Comparative Example 3 is that it cannot completely wet the surface of the modified asphalt to form a flat and smooth coating, and the low-temperature flexibility can only meet the SBS modified asphalt roll type 1 index, and the bonding performance with various coatings is poor; the main problem of Comparative Example 4 is large surface energy and poor anti-sticking effect.

[0124] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A coating for an isolation layer of a modified asphalt waterproofing membrane, characterized in that: The raw materials for preparing the coating include: emulsified asphalt, water, emulsion, anti-sticking agent, pH regulator, defoamer, stabilizer, curing agent, titanium dioxide and filler.

2. The coating according to claim 1, wherein The raw materials for preparing the coating include, by weight: 10-20 parts of emulsified asphalt, 10-20 parts of water, 55-65 parts of emulsion, 5-8 parts of anti-sticking agent, 1-2 parts of pH regulator, 0.5-1 parts of defoaming agent, 0.5-1 parts of stabilizer, 2-4 parts of curing agent, 3-5 parts of titanium dioxide and 10-15 parts of filler.

3. The coating according to claim 1 or 2, wherein The emulsified asphalt is anionic emulsified asphalt.

4. The coating according to claim 1 or 2, wherein The emulsion is a modified polypropylene wax emulsion.

5. The coating according to claim 1 or 2, wherein The anti-adhesive agent is at least one of polytetrafluoroethylene, vinylidene fluoride and FEVE resin; The curing agent is preferably an acrylic silicone resin curing agent.

6. The coating according to claim 1 or 2, wherein: The pH regulator is 2-amino-2-methyl-1-propanol; The defoaming agent is hydroxyethyl cellulose; The stabilizer is hydroxyethyl cellulose ether; The titanium dioxide is diamond red type titanium dioxide; The filler is at least one of heavy calcium, light calcium, talcum powder and stone powder.

7. The method for preparing the coating according to any one of claims 1 to 6, characterized in that: The preparation method comprises: (1) mixing the emulsion, pH regulator, water and anti-adhesive agent to obtain a first component; (2) mixing the filler and titanium dioxide uniformly to obtain a second component; (3) uniformly mixing the first component, the second component and the emulsified asphalt to obtain the third component; (4) uniformly mixing the third component, the stabilizer and the defoaming agent to obtain a fourth component; (5) The fourth component and the curing agent are mixed evenly to obtain the coating for the isolation layer of the modified asphalt waterproof membrane.

8. Use of the coating according to any one of claims 1 to 6 in preparing an isolation layer of a modified asphalt waterproofing membrane.

9. A composite waterproofing membrane, characterized in that: The composite waterproofing membrane comprises in sequence: a first isolation layer, a first modified asphalt waterproofing layer, a reinforcement layer, a second modified asphalt waterproofing layer and a second isolation layer; The material of at least one of the first isolation layer and the second isolation layer is the coating according to any one of claims 1 to 6; Preferably, when only one of the first isolation layer and the second isolation layer is made of the coating according to any one of claims 1 to 6, the material of the other isolation layer is PE film, fine sand or mineral granules.

10. The method for preparing the composite waterproof coiled material according to claim 9, characterized in that: The preparation method comprises: (1) immersing the dried and pre-impregnated reinforcement layer into a hot-melt modified asphalt pool to form a modified asphalt waterproof layer on the upper and lower surfaces of the reinforcement layer, respectively, and then determining the thickness to obtain a semi-finished product; (2) spraying the coating according to any one of claims 1 to 6 on the modified asphalt waterproof layer on at least one side of the semi-finished product; (3) When the semi-finished product obtained in step (2) is sprayed with coating on both sides, the semi-finished product obtained in step (2) is subjected to water cooling treatment in sequence, and the spray coating is subjected to UV curing treatment and water cooling treatment simultaneously during the water cooling treatment to obtain the composite waterproof membrane; When the semi-finished product obtained in step (2) is sprayed with paint only on the modified asphalt waterproof layer on one side, the semi-finished product obtained in step (2) is sequentially subjected to water cooling treatment only, UV curing treatment of the spray coating during water cooling treatment, and water cooling treatment only; then, a film or sand coating is applied on the modified asphalt waterproof layer on the other side, and finally a cooling treatment is performed to obtain the composite waterproof membrane.

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