Non-cured rubber asphalt waterproof coating and preparation method thereof

Abstract

The invention discloses a non-cured rubber asphalt waterproof coating and a preparation method thereof. The waterproof coating comprises a component A and a component B, the component A is prepared from asphalt, liquid butadiene-styrene rubber, turpentine, rosin, castor oil, a viscosity reducer, benzoyl peroxide, filler and a defoaming agent; and the component B comprises castor oil, N, N-dimethyl p-benzylamine and a terminating agent. Asphalt and modified asphalt do not need to be heated, and heating is not needed in the preparation process of the non-cured rubber asphalt waterproof coating. The component A and the component B of the non-cured rubber asphalt waterproof coating are in a liquid state at normal temperature and are uniformly stirred in proportion before construction, and heating is not needed; a redox system is introduced, the reaction is catalyzed at normal temperature, and heating is not needed in the reaction process.

Description

Technical Field

[0001] The present invention belongs to the technical field of waterproof coatings, and more specifically, relates to a non-curing rubber asphalt waterproof coating and a preparation method thereof. Background Art

[0002] Non-curing rubber asphalt waterproof coating has the advantages of fast construction, excellent creep performance, adhesion performance, self-healing, wet base construction, chemical corrosion resistance and aging resistance, environmental protection, and never curing. It is widely used in various industrial buildings and planted roof waterproofing projects. In the past five years, the annual growth rate of non-curing has exceeded 30%, and the annual output has exceeded 140,000 tons.

[0003] Non-curing rubber asphalt waterproof coatings have excellent creep properties and can be used to repair special parts such as roofs and expansion joints. They can perfectly match the product needs of the civil building materials market and the repair market. However, non-curing rubber asphalt waterproof coatings currently require a special barrel remover to heat and remove the barrel, and then transfer to a melter to melt to a fluid state before use. In addition, hot-melt non-curing rubber asphalt waterproof coatings are prone to produce large amounts of asphalt fumes, which pollute the environment and limit their promotion and application in the fields of civil building materials and repair. At the same time, existing non-curing rubber asphalt waterproof coatings also have problems such as high temperature, high energy consumption, and long time in the preparation process; as well as high requirements for construction tools during construction, and many restrictions on construction conditions, making it difficult to construct small-area projects such as maintenance and civil use. Summary of the invention

[0004] The purpose of the present invention is to provide a non-curing rubber asphalt waterproof coating and a preparation method thereof. The present invention optimizes the formula design so that the waterproof coating does not need to be heated during the preparation process, and the prepared non-curing rubber asphalt waterproof coating can be cold constructed at room temperature.

[0005] In order to achieve the above-mentioned object, one aspect of the present invention provides a non-curing rubber asphalt waterproof coating, which comprises: component A and component B;

[0006] The component A comprises: asphalt, liquid butadiene-styrene rubber, turpentine, rosin, castor oil, viscosity reducer, benzoyl peroxide, filler and defoamer;

[0007] The B component comprises castor oil, N,N-dimethyl-p-benzylamine and a terminator.

[0008] In the present invention, pine nut oil is used to dissolve asphalt and rosin, the asphalt is modified by the rosin, and then mixed with liquid butadiene-styrene rubber containing double bonds and castor oil to prepare a non-curing rubber asphalt waterproof coating at room temperature.

[0009] In the present invention, the double bonds in pine nut oil, rosin, semi-drying vegetable oil-castor oil, liquid styrene-butadiene rubber and asphalt are used to carry out free radical polymerization, and the heat resistance and low-temperature flexibility are improved after the reaction, and the reaction degree is controlled to maintain the non-curing characteristics.

[0010] In the present invention, pine nut oil is used to dissolve asphalt and rosin, and heating is not required to dissolve the asphalt. Rosin can improve the heat resistance and base bonding strength of the product, and liquid butadiene-styrene rubber can improve the low-temperature flexibility of the product.

[0011] In the present invention, the redox system benzoyl peroxide-N, N-dimethyl-p-benzoyl is placed in components A and B respectively to catalyze a mixed reaction of the system at room temperature; after the components A and B are mixed and constructed, the reaction is carried out at room temperature without heating.

[0012] The non-curing rubber asphalt waterproof coating of the present invention can be prepared at room temperature, solving the problems of long production time and high energy consumption in the prior art; it can be constructed at room temperature without the need for removing the barrel and melting the glue, is safe and environmentally friendly, and does not require heating, solving the problems of high-temperature construction, environmental pollution and potential safety hazards in the prior art.

[0013] According to the present invention, preferably, the A component comprises, by mass, 20-40 parts of asphalt, 10-30 parts of liquid butadiene-styrene rubber, 5-30 parts of turpentine, 3-15 parts of rosin, 5-20 parts of castor oil, 1-5 parts of viscosity reducer, 0.1-1 parts of benzoyl peroxide, 10-35 parts of filler and 0.1-0.5 parts of defoamer;

[0014] Calculated by weight, the B component includes: 10-30 parts of castor oil, 0.5-2 parts of N,N-dimethyl-p-benzylamine and 0.01-0.3 parts of a terminator.

[0015] According to the present invention, preferably, the asphalt is 200# asphalt and / or 90# asphalt.

[0016] According to the present invention, preferably, the viscosity reducing agent is alkylphenol disulfide.

[0017] In the present invention, the viscosity reducer can reduce the viscosity of the system and improve the feasibility of preparation at room temperature.

[0018] According to the present invention, preferably, the filler is talc.

[0019] According to the present invention, preferably, the defoaming agent is an oily defoaming agent.

[0020] In the present invention, the addition of a defoaming agent can suppress and eliminate bubbles.

[0021] According to the present invention, preferably, the terminator is nonylphenol.

[0022] In the present invention, the reaction degree can be adjusted by adding a terminator.

[0023] According to the present invention, preferably, the mass ratio of component A to component B is (3-8):1.

[0024] Another aspect of the present invention provides a method for preparing the above-mentioned non-curing rubber asphalt waterproof coating, the preparation method comprising:

[0025] The asphalt, liquid butadiene-styrene rubber, turpentine, rosin, castor oil, viscosity reducer, benzoyl peroxide, filler and defoamer are uniformly mixed to obtain the A component;

[0026] The castor oil, N,N-dimethyl-p-benzylamine and the terminator are uniformly mixed to obtain the B component.

[0027] According to the present invention, preferably, the preparation method comprises:

[0028] The asphalt, turpentine, rosin, castor oil and viscosity reducer are stirred at a speed of 300-400 r / min for 5-10 minutes; then the liquid butadiene-styrene rubber and defoamer are added, and the mixture is stirred at a speed of 600-700 r / min for 30-40 minutes; finally, the benzoyl peroxide and filler are added, and the mixture is stirred at a speed of 600-700 r / min for 30-40 minutes, and then stirred at a speed of 300-400 r / min for 5-10 minutes to obtain the component A;

[0029] The castor oil, N,N-dimethyl-p-benzylamine and the terminator are stirred at a rotation speed of 300-400 r / min for 5-10 minutes to obtain the B component.

[0030] The non-curing rubber asphalt waterproof coating of the present invention can be applied after being mixed at room temperature and stirred evenly before application.

[0031] The technical solution of the present invention has the following beneficial effects:

[0032] (1) The present invention does not require heating of asphalt or heating of modified asphalt, and the preparation process of the non-curing rubber asphalt waterproof coating does not require heating.

[0033] (2) The A and B components of the non-curing rubber asphalt waterproof coating of the present invention are both in liquid state at room temperature and can be evenly stirred in proportion before construction without heating.

[0034] (3) The present invention introduces a redox system to catalyze the reaction at room temperature, and the reaction process does not require heating.

[0035] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0036] 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.

[0037] The present invention is further described below by examples:

[0038] In the following embodiments and comparative examples:

[0039] The viscosity reducer used was alkylphenol disulfide, purchased from Hangzhou Kanghua Trading Co., Ltd., with the brand name HY217;

[0040] The liquid rubber is liquid butadiene-styrene rubber purchased from Sinopec Maoming Branch, brand HBS30;

[0041] The defoamer is an oily defoamer, specifically an organosilicon defoamer purchased from Defeng Company, with the brand name DF-2854;

[0042] The filler is talcum powder with a particle size of 400 mesh.

[0043] Example 1

[0044] This embodiment provides a non-curing rubber asphalt waterproof coating, and the specific preparation method is as follows:

[0045] Component A: In terms of mass, add 35 parts of 200# asphalt, 5 parts of turpentine, 5 parts of rosin, 10 parts of castor oil and 1 part of viscosity reducer to the reactor in sequence, start stirring at a speed of 350r / min and stir for 8 minutes; add 15 parts of liquid rubber and 0.3 parts of defoaming agent, increase the speed to 650r / min and stir for 35 minutes; add 0.5 parts of benzoyl peroxide and 20 parts of filler, continue stirring at a speed of 650r / min for 35 minutes; reduce the speed to 350r / min, stir for 8 minutes, and discharge.

[0046] Component B: Add 15 parts of castor oil, 1 part of N,N-dimethyl-p-benzylamine and 0.1 part of nonylphenol to the reactor in order by mass, start stirring, stir at 350 r / min for 8 minutes, let stand for 5 minutes, and discharge.

[0047] The above-mentioned component A and component B are stirred and mixed evenly at room temperature in a mass ratio of 3:1, and then placed at room temperature for 168 hours, and then tested in accordance with JC / T 2428-2017 for items 1 to 5 in the table. The specific test results are shown in the table below; in the table, the mixed construction viscosity is the viscosity of component A and component B after stirring and mixing at the above-mentioned mass ratio at room temperature during construction.

[0048] Table 1 Test results of Example 1

[0049] Serial number Test items Test Results 1 Heat resistance No sliding, flowing or dripping at 65℃ 2 Low temperature flexibility -25℃ no cracks 3 Oil permeability 2 pieces 4 Extensibility 18mm 5 Adhesive properties 100% cohesive failure 6 Mixed construction viscosity 5000(23±2℃)

[0050] Example 2

[0051] This embodiment provides a non-curing rubber asphalt waterproof coating, and the specific preparation method is as follows:

[0052] Component A: In terms of mass, add 20 parts of 90# asphalt, 10 parts of turpentine, 5 parts of rosin, 15 parts of castor oil and 2 parts of viscosity reducer into the reactor in sequence, start stirring at a speed of 350r / min for 8 minutes; add 20 parts of liquid rubber and 0.3 parts of defoaming agent, increase the speed to 650r / min, and stir for 35 minutes; add 0.5 parts of benzoyl peroxide and 15 parts of filler, and continue stirring at a speed of 650r / min for 35 minutes; reduce the speed to 350r / min, stir for 8 minutes, and discharge.

[0053] Component B: Add 15 parts of castor oil, 1.5 parts of N,N-dimethyl-p-benzylamine and 0.05 parts of nonylphenol to the reactor in order by mass, start stirring, stir at 350 r / min for 8 minutes, let stand for 5 minutes, and discharge.

[0054] The above-mentioned component A and component B are stirred and mixed evenly at room temperature in a mass ratio of 5:1, and then placed at room temperature for 168 hours, and then tested in accordance with JC / T 2428-2017 for items 1 to 5 in the table. The specific test results are shown in the table below; in the table, the mixed construction viscosity is the viscosity of component A and component B after stirring and mixing at the above-mentioned mass ratio at room temperature during construction.

[0055] Table 2 Example 2 Test results

[0056] Serial number Test items Test Results 1 Heat resistance No sliding, flowing or dripping at 70℃ 2 Low temperature flexibility -23℃ no cracks 3 Oil permeability 2 pieces 4 Extensibility 16mm 5 Adhesive properties 100% cohesive failure 6 Mixed construction viscosity 6500(23±2℃)

[0057] Example 3

[0058] This embodiment provides a non-curing rubber asphalt waterproof coating, and the specific preparation method is as follows:

[0059] Component A: In terms of mass, add 25 parts of 90# asphalt, 10 parts of turpentine, 5 parts of rosin, 15 parts of castor oil and 2 parts of viscosity reducer into the reactor in sequence, start stirring at a speed of 350r / min for 8 minutes; add 20 parts of liquid rubber and 0.3 parts of defoamer, increase the speed to 650r / min, and stir for 35 minutes; add 0.5 parts of benzoyl peroxide and 15 parts of filler, continue stirring at a speed of 650r / min for 35 minutes; reduce the speed to 350r / min, stir for 8 minutes, and discharge.

[0060] Component B: Add 15 parts of castor oil, 2 parts of N,N-dimethyl-p-benzylamine and 0.05 parts of nonylphenol to the reactor in order by mass, start stirring, stir at 350 r / min for 8 minutes, let stand for 5 minutes, and discharge.

[0061] The above-mentioned component A and component B are stirred and mixed evenly at room temperature in a mass ratio of 8:1, and then placed at room temperature for 168 hours, and then tested in accordance with JC / T 2428-2017 for items 1 to 5 in the table. The specific test results are shown in the table below; in the table, the mixed construction viscosity is the viscosity of component A and component B after stirring and mixing at the above-mentioned mass ratio at room temperature during construction.

[0062] Table 3 Example 3 test results

[0063] Serial number Test items Test Results 1 Heat resistance No sliding, flowing or dripping at 75℃ 2 Low temperature flexibility -20℃ no cracks 3 Oil permeability 2 pieces 4 Extensibility 15mm 5 Adhesive properties 100% cohesive failure 6 Mixed construction viscosity 7500(23±2℃)

[0064] Comparative Example 1

[0065] This comparative example provides a non-curing rubber asphalt waterproof coating, and the specific preparation method is as follows:

[0066] Component A: The only difference from Example 3 is that no liquid rubber is added, and the rest is the same as Example 3.

[0067] Component B: Same as Example 3.

[0068] The above-mentioned component A and component B are stirred and mixed evenly at room temperature in a mass ratio of 8:1, and then placed at room temperature for 168 hours, and then tested in accordance with JC / T 2428-2017 for items 1 to 5 in the table. The specific test results are shown in the table below; in the table, the mixed construction viscosity is the viscosity of component A and component B after stirring and mixing at the above-mentioned mass ratio at room temperature during construction.

[0069] Table 4 Comparative Example 1 Test Results

[0070]

[0071]

[0072] 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 non-curing rubber asphalt waterproof coating, characterized in that: The waterproof coating comprises: component A and component B; The component A comprises: asphalt, liquid butadiene-styrene rubber, turpentine, rosin, castor oil, viscosity reducer, benzoyl peroxide, filler and defoamer; The B component comprises castor oil, N,N-dimethyl-p-benzylamine and a terminator.

2. The non-curing rubber asphalt waterproof coating according to claim 1, wherein: In parts by mass, the component A comprises: 20-40 parts of asphalt, 10-30 parts of liquid butadiene-styrene rubber, 5-30 parts of turpentine, 3-15 parts of rosin, 5-20 parts of castor oil, 1-5 parts of viscosity reducer, 0.1-1 parts of benzoyl peroxide, 10-35 parts of filler and 0.1-0.5 parts of defoamer; In parts by mass, the B component comprises: 10-30 parts of castor oil, 0.5-2 parts of N,N-dimethyl-p-benzylamine and 0.01-0.3 parts of a terminator.

3. The non-curing rubber asphalt waterproof coating according to claim 1 or 2, wherein: The asphalt is 200# asphalt and / or 90# asphalt.

4. The non-curing rubber asphalt waterproof coating according to claim 1 or 2, wherein: The viscosity reducing agent is alkylphenol disulfide.

5. The non-curing rubber asphalt waterproof coating according to claim 1 or 2, wherein: The filler is talc.

6. The non-curing rubber asphalt waterproof coating according to claim 1 or 2, wherein: The defoamer is an oily defoamer.

7. The non-curing rubber asphalt waterproof coating according to claim 1 or 2, wherein: The terminator is nonylphenol.

8. The non-curing rubber asphalt waterproof coating according to claim 1 or 2, wherein: The mass ratio of component A to component B is (3-8):

1.

9. The method for preparing the non-curing rubber asphalt waterproof coating according to any one of claims 1 to 8, characterized in that: The preparation method comprises: The asphalt, liquid butadiene-styrene rubber, turpentine, rosin, castor oil, viscosity reducer, benzoyl peroxide, filler and defoamer are uniformly mixed to obtain the A component; The castor oil, N,N-dimethyl-p-benzylamine and the terminator are uniformly mixed to obtain the B component.

10. The preparation method according to claim 9, wherein: The preparation method comprises: The asphalt, turpentine, rosin, castor oil and viscosity reducer are stirred at a speed of 300-400 r / min for 5-10 minutes; then the liquid butadiene-styrene rubber and defoamer are added, and the mixture is stirred at a speed of 600-700 r / min for 30-40 minutes; finally, the benzoyl peroxide and filler are added, and the mixture is stirred at a speed of 600-700 r / min for 30-40 minutes, and then stirred at a speed of 300-400 r / min for 5-10 minutes to obtain the component A; The castor oil, N,N-dimethyl-p-benzylamine and the terminator are stirred at a rotation speed of 300-400 r / min for 5-10 minutes to obtain the B component.

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