A non-cured rubber asphalt waterproofing coating

Abstract

The application discloses a non-cured rubber asphalt waterproof coating, which comprises the following components in parts by weight: asphalt 50-65 parts; softening agent 5-20 parts; asphalt modifier 1-4 parts; cationic butadiene-styrene latex 10-12 parts; filler 6-10 parts; low-temperature resistant modifier 8-15 parts; wherein the low-temperature resistant modifier is prepared by mixing dimethyl adipate and ethylene-methyl acrylate copolymer according to a mass ratio of 1:2-3. The application can meet the waterproof performance under a low-temperature environment, and has the advantages of good extensibility, high adhesive strength, excellent temperature resistance and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waterproofing coating. More particularly, the present application relates to a non-cured rubber asphalt waterproofing coating. BACKGROUND

[0002] The non-cured rubber asphalt waterproofing coating is a waterproofing coating which keeps viscous paste in service life, and is made of rubber, asphalt, softening oil, temperature control agent and filler. It has excellent waterproofing effect for special parts such as deformation joint of building engineering. As a new type of waterproofing material, the non-cured rubber asphalt waterproofing coating has the advantages of good adhesion, strong creep, good self-healing and permanent non-curing. However, the temperature resistance of the existing non-cured rubber asphalt waterproofing coating cannot adapt to extremely cold areas, and cracks may occur, resulting in failure of waterproofing performance of the waterproofing coating. SUMMARY

[0003] The purpose of the present application is to provide a non-cured rubber asphalt waterproofing coating which can meet the waterproofing performance in low temperature environment and has the advantages of good extensibility, high adhesion strength and excellent temperature resistance.

[0004] The technical solution adopted by the present application to solve the technical problem is: a non-cured rubber asphalt waterproofing coating, comprising the following components in parts by weight:

[0005] asphalt 50-65 parts;

[0006] softening agent 5-20 parts;

[0007] asphalt modifier 1-4 parts;

[0008] cationic styrene-butadiene latex 10-12 parts;

[0009] filler 6-10 parts;

[0010] low temperature resistant modifier 8-15 parts;

[0011] wherein the low temperature resistant modifier is made of dimethyl adipate and ethylene-methyl acrylate copolymer in a mass ratio of 1:2-3.

[0012] Preferably, the components include the following components in parts by weight:

[0013] asphalt 50-65 parts;

[0014] softening agent 5-20 parts;

[0015] asphalt modifier 1-4 parts;

[0016] cationic styrene-butadiene latex 10-12 parts;

[0017] filler 6-10 parts;

[0018] assistant 8-12 parts;

[0019] Low temperature resistance modifier 8-15 parts;

[0020] The filler is made of polyimide microspheres (spherical structure) with an average particle size of 32 μm and microcrystalline white mica powder in a mass ratio of 1-3:10, and the microcrystalline white mica powder has a particle size of less than 200 mesh; the assistant is hydroxyethyl methacrylate.

[0021] Preferably, the asphalt is 70# asphalt or 90# asphalt or a mixture of the two.

[0022] Preferably, the asphalt modifier is SBS.

[0023] Preferably, the softening agent is pine tar.

[0024] Preferably, the preparation method of the non-cured rubber asphalt waterproof coating comprises the following steps:

[0025] 1) Heat the asphalt to 150-155℃, add the softening agent and shear homogenize in a shear machine, then heat to 170-175℃, add the asphalt modifier and continue to shear homogenize to obtain modified asphalt;

[0026] 2) Add the cationic styrene-butadiene latex, filler and low temperature resistance modifier to the modified asphalt and shear homogenize at 150-155℃ to obtain the non-cured rubber asphalt waterproof coating.

[0027] Preferably, the filler is made of polyimide microspheres (spherical structure) with an average particle size of 32 μm and microcrystalline white mica powder in a mass ratio of 1-3:10, and the microcrystalline white mica powder has a particle size of less than 200 mesh;

[0028] Further comprising an assistant, and the mass ratio of the assistant to the filler is 4-6:3-5;

[0029] In step 2), the cationic styrene-butadiene latex, filler, assistant and low temperature resistance modifier are added to the modified asphalt and shear homogenized at 150-155℃ to obtain the non-cured rubber asphalt waterproof coating.

[0030] The present application at least includes the following beneficial effects:

[0031] 1. When dimethyl adipate and ethylene-methyl acrylate copolymer are added separately, they can improve the low-temperature flexibility of the non-curing rubber asphalt waterproof coating to a certain extent, but the degree of improvement is limited. During the reaction process, after the two are added together, the cationic styrene-butadiene latex modifies the asphalt and simultaneously undergoes graft polymerization with dimethyl adipate and ethylene-methyl acrylate copolymer, so that the non-curing rubber asphalt waterproof coating forms a three-dimensional network structure during the reaction process, greatly improving the temperature sensitivity of the non-curing rubber asphalt waterproof coating, making it adaptable to various harsh environments and having a wider range of uses.

[0032] 2. By optimizing the filler's raw materials and incorporating additives, this application achieves a three-dimensional network structure formed by the dispersion of polyimide microspheres and microcrystalline muscovite powder, both of varying particle size, during the reaction process. This improves the coating's bond strength. The spherical structure of the polyimide microspheres exhibits a rolling effect, enhancing the elongation of the non-curing rubber asphalt waterproof coating and maintaining good creep properties.

[0033] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. DETAILED DESCRIPTION

[0034] The present invention is described in detail and completely below in conjunction with the embodiments. Those skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the embodiments, it should be noted that the technical solutions and technical features provided in various parts of the present invention, including the following description, may be combined with each other unless they conflict.

[0035] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.

[0036] Example 1

[0037] The non-curing rubber asphalt waterproof coating provided in this embodiment is composed of the following components, in parts by weight: 50 parts of 70# asphalt; 10 parts of pine tar as a softener; 2 parts of SBS asphalt modifier; 10 parts of cationic styrene-butadiene latex; 8 parts of filler; 10 parts of low-temperature resistant modifier; wherein the low-temperature resistant modifier is prepared by mixing dimethyl adipate and ethylene-methyl acrylate copolymer in a mass ratio of 1:2; the filler is microcrystalline muscovite powder with a particle size of less than 200 mesh.

[0038] The preparation method of the non-cured rubber asphalt waterproof coating in this embodiment is: 1) heat the asphalt to 150°C, add a softening agent, and shear and homogenize in a shear machine, the shearing speed is 5000 r / min, the shearing time is 1 h, then heat to 170°C, add an asphalt modifier, and continue to shear and homogenize, the shearing speed is 5000 r / min, the shearing time is 1 h, to obtain modified asphalt;

[0039] 2) add cationic styrene-butadiene latex, fillers, and a low-temperature resistant modifier to the modified asphalt, shear and homogenize at 150°C, the shearing speed is 5000 r / min, the shearing time is 1 h, to obtain the non-cured rubber asphalt waterproof coating.

[0040] Example 2

[0041] The non-cured rubber asphalt waterproof coating provided in this embodiment is composed of the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; fillers 8 parts; auxiliary agent hydroxyethyl methacrylate 10 parts; low-temperature resistant modifier 10 parts;

[0042] The low-temperature resistant modifier is composed of dimethyl adipate and ethylene-methyl acrylate copolymer in a mass ratio of 1:2; the fillers are composed of polyimide microspheres with an average particle size of 32 μm and microcrystalline white mica powder in a mass ratio of 3:10, and the microcrystalline white mica powder has a particle size of less than 200 mesh.

[0043] The preparation method of the non-cured rubber asphalt waterproof coating in this embodiment is: 1) heat the asphalt to 150°C, add a softening agent, and shear and homogenize in a shear machine, the shearing speed is 5000 r / min, the shearing time is 1 h, then heat to 170°C, add an asphalt modifier, and continue to shear and homogenize, the shearing speed is 5000 r / min, the shearing time is 1 h, to obtain modified asphalt;

[0044] 2) add cationic styrene-butadiene latex, fillers, and a low-temperature resistant modifier to the modified asphalt, shear and homogenize at 150°C, the shearing speed is 5000 r / min, the shearing time is 1 h, to obtain the non-cured rubber asphalt waterproof coating.

[0045] Example 3

[0046] The non-cured rubber asphalt waterproof coating provided in this embodiment is composed of the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; fillers 8 parts; auxiliary agent hydroxyethyl methacrylate 10 parts; low-temperature resistant modifier 10 parts;

[0047] The low-temperature resistant modifier is prepared by mixing dimethyl adipate and ethylene-methyl acrylate copolymer at a mass ratio of 1:3; the filler is prepared by mixing polyimide microspheres with an average particle size of 32 μm and microcrystalline white mica powder at a mass ratio of 3:10, and the microcrystalline white mica powder has a particle size of less than 200 mesh.

[0048] The preparation method of the non-cured rubber asphalt waterproof coating in the embodiment is as follows: 1) the asphalt is heated to 150 ℃, the softening agent is added, and shearing homogenization is performed in a shearing machine at a shearing speed of 5000 r / min for 1 h; then the temperature is increased to 170 ℃, the asphalt modifier is added, and shearing homogenization is continued at a shearing speed of 5000 r / min for 1 h to obtain modified asphalt;

[0049] 2) the cationic styrene-butadiene latex, the filler, the additive, and the low-temperature resistant modifier are added to the modified asphalt, and shearing homogenization is performed at 150 ℃ at a shearing speed of 5000 r / min for 1 h to obtain the non-cured rubber asphalt waterproof coating.

[0050] Comparative Example 1

[0051] The non-cured rubber asphalt waterproof coating is composed of the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; filler 8 parts; and the filler is microcrystalline white mica powder with a particle size of less than 200 mesh.

[0052] The preparation method of the non-cured rubber asphalt waterproof coating is as follows: 1) the asphalt is heated to 150 ℃, the softening agent is added, and shearing homogenization is performed in a shearing machine at a shearing speed of 5000 r / min for 1 h; then the temperature is increased to 170 ℃, the asphalt modifier is added, and shearing homogenization is continued at a shearing speed of 5000 r / min for 1 h to obtain modified asphalt;

[0053] 2) the cationic styrene-butadiene latex, the filler, the additive, and the low-temperature resistant modifier are added to the modified asphalt, and shearing homogenization is performed at 150 ℃ at a shearing speed of 5000 r / min for 1 h to obtain the non-cured rubber asphalt waterproof coating.

[0054] Comparative Example 2

[0055] The non-cured rubber asphalt waterproof coating is composed of the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; filler 8 parts; low-temperature resistant modifier 10 parts; and the low-temperature resistant modifier is dimethyl adipate; and the filler is microcrystalline white mica powder with a particle size of less than 200 mesh.

[0056] The preparation method of the non-cured rubber asphalt waterproof coating is the same as that in Example 1.

[0057] Comparative Example 3

[0058] The non-cured rubber asphalt waterproof coating is prepared from the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; filler 8 parts; low-temperature resistant modifier 10 parts; wherein the low-temperature resistant modifier is ethylene-methyl acrylate copolymer; and the filler is microcrystalline white mica powder with a particle size less than 200 mesh.

[0059] The non-cured rubber asphalt waterproof coating is prepared by the method of Example 1.

[0060] Comparative Example 4

[0061] The non-cured rubber asphalt waterproof coating is prepared from the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; filler 8 parts; low-temperature resistant modifier 10 parts;

[0062] The low-temperature resistant modifier is prepared by mixing dimethyl adipate and ethylene-methyl acrylate copolymer at a mass ratio of 1:2; the filler is microcrystalline white mica powder with a particle size less than 200 mesh.

[0063] The non-cured rubber asphalt waterproof coating is prepared by the method of Example 2.

[0064] Comparative Example 5

[0065] The non-cured rubber asphalt waterproof coating is prepared from the following components in parts by weight: 70# asphalt 50 parts; softening agent pine tar 10 parts; asphalt modifier SBS 2 parts; cationic styrene-butadiene latex 10 parts; filler 8 parts; low-temperature resistant modifier 10 parts;

[0066] The low-temperature resistant modifier is prepared by mixing dimethyl adipate and ethylene-methyl acrylate copolymer at a mass ratio of 1:2; the filler is prepared by mixing polyimide microspheres with an average particle size of 32 μm and microcrystalline white mica powder at a mass ratio of 3:10, and the microcrystalline white mica powder has a particle size less than 200 mesh.

[0067] The non-cured rubber asphalt waterproof coating is prepared by the method of Example 1.

[0068] The non-cured rubber asphalt waterproof coatings prepared in each of the examples and comparative examples are subjected to performance testing according to the test method for building waterproof coatings GB / T16777-2008, and the results are shown in Table 1.

[0069] Table 1

[0070]

[0071] As can be seen from the data in Table 1, the non-cured rubber asphalt waterproof coating prepared in the application has obvious advantages in low-temperature flexibility and heat resistance; the addition of low-temperature resistant modifier will cause the adhesive strength of the waterproof coating to decrease, and the addition of additives and the optimization of the filler composition can significantly improve this defect; the addition of polyimide microspheres in the filler can significantly improve the elongation performance of the waterproof coating, and under the action of the waterproof coating, the performance is more excellent and the application range is wider.

[0072] In addition, the embodiments of the application involved in the following description are generally only a part of the embodiments of the application, not all the embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments in the application without creative labor should belong to the protection scope of the application.

[0073] Although the embodiments of the application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the application, and other modifications can be easily realized by those skilled in the art, and therefore the application is not limited to specific details and the embodiments shown and described herein.

Claims

1. A non-curing rubber asphalt waterproof coating, characterized in that: The composition comprises the following components in parts by weight: 50-65 parts of asphalt; 5-20 parts of softener; 1-4 parts asphalt modifier; 10-12 parts of cationic styrene-butadiene latex; 6-10 parts of filler; 8-12 parts of additives; 8-15 parts of low temperature resistant modifier; The low-temperature resistant modifier is prepared by mixing dimethyl adipate and ethylene-methyl acrylate copolymer in a mass ratio of 1:2-3. The filler is composed of polyimide microspheres with an average particle size of 32 μm and microcrystalline muscovite powder in a mass ratio of 1 to 3:10, the particle size of the microcrystalline muscovite powder is less than 200 mesh, and the polyimide microspheres have a spherical structure; the auxiliary agent is hydroxyethyl methacrylate, and the mass ratio of the auxiliary agent to the filler is 4-6:3-5.

2. The non-curing rubber asphalt waterproof coating according to claim 1, characterized in that: The asphalt is 70# asphalt or 90# asphalt or a mixture of the two.

3. The non-curing rubber asphalt waterproof coating according to claim 1, characterized in that: The asphalt modifier is SBS.

4. The non-curing rubber asphalt waterproof coating according to claim 1, characterized in that: The softener is pine tar.

5. The non-curing rubber asphalt waterproof coating according to claim 1, characterized in that: The preparation method of the non-curing rubber asphalt waterproof coating comprises the following steps: 1) Heat the asphalt to 150-155°C, add a softener and shear and homogenize in a shearing machine, then heat it to 170-175°C, add an asphalt modifier and continue shearing and homogenizing to obtain modified asphalt; 2) Adding cationic styrene-butadiene latex, filler, additive and low-temperature resistant modifier into modified asphalt and shear homogenizing at 150-155° C. to obtain a non-curing rubber asphalt waterproof coating.

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