Composition for modified asphalt coating material, modified asphalt coating material, preparation method of modified asphalt coating material and waterproof coiled material

Abstract

The invention relates to the field of waterproof materials, and discloses a composition for a modified asphalt coating material, the modified asphalt coating material, a preparation method of the modified asphalt coating material and a waterproof coiled material, the composition contains a main agent and auxiliaries, and the main agent comprises matrix asphalt, solvent oil with the aromatic hydrocarbon content larger than or equal to 70 wt%, linear SBS, SBR, neodymium iron boron magnetic powder, cobalt boroacylate and styrene-indene resin; based on the total weight of the composition, the content of the matrix asphalt is 40-55 wt%, the content of the solvent oil is 5-10 wt%, the content of the linear SBS is 3-5 wt%, and the content of the SBR is 3-5 wt%. The waterproof coiled material provided by the invention is excellent in heat preservation property, low temperature resistance and deformation resistance and is suitable for metal roofs.

Description

Technical Field

[0001] The present invention relates to the field of waterproof materials, and in particular to a modified asphalt coating composition, a modified asphalt coating and a preparation method thereof, and a waterproof roll. Background Art

[0002] Existing metal roof waterproofing membranes are traditional wet-laid membranes. After construction, they are exposed to long-term UV radiation, which can cause the membrane to peel off, leading to heat absorption and increased indoor temperatures. Furthermore, existing asphalt membrane adhesives rely primarily on rubber for modification and adhesion. Long-term exposure to the elements causes the rubber to age, degrading the membrane's adhesive properties and potentially causing the membrane to peel.

[0003] In addition, existing coils generally use SBS, SBR, etc. as modifiers, which will age after long-term ultraviolet exposure and cause the coils to crack under low temperature conditions.

[0004] CN116463072A discloses a low-temperature-resistant, self-adhesive polymer-modified asphalt waterproofing membrane. The membrane comprises, from bottom to top, a modified asphalt layer, a base layer, a modified asphalt layer, and an isolation layer. The modified asphalt layer comprises the following components by weight: 38-42 parts base asphalt; 10-15 parts base oil; 3-6 parts SBS resin; 8-12 parts SBR resin; 3-5 parts high-temperature modifier; 8-12 parts tackifier; 25-30 parts inorganic filler; 4-6 parts low-temperature asphalt modifier; 2-4 parts polyphosphoric acid; 2.8-4.5 parts nitrile rubber powder; 0.023-0.045 parts graphene oxide; and 0.115-0.225 parts multi-walled carbon nanotubes. This solution utilizes multiple raw materials to synergistically enhance the membrane's low-temperature mechanical and adhesive properties, but it is not suitable for metal roofing.

[0005] Therefore, there is an urgent need for a waterproof roll material that has excellent thermal insulation, low temperature resistance and deformation resistance and is suitable for metal roofs to solve this defective situation. Summary of the Invention

[0006] The purpose of the present invention is to overcome the defects of the prior art waterproofing membrane suitable for metal roofs, such as poor low-temperature performance and easy deformation after long-term construction, which causes leakage of the metal roof.

[0007] In order to achieve the above-mentioned object, the first aspect of the present invention provides a modified asphalt coating composition, which contains a main agent and an auxiliary agent, wherein the main agent includes a base asphalt, a solvent oil with an aromatic hydrocarbon content of ≥70wt%, linear SBS, SBR, NdFeB magnetic powder, cobalt boroacylate and styrene-indene resin;

[0008] Based on the total weight of the composition, the content of the matrix asphalt is 40-55wt%, the content of the solvent oil is 5-10wt%, the content of the linear SBS is 3-5wt%, the content of the SBR is 3-5wt%, the content of the neodymium iron boron magnetic powder is 2-6wt%, the content of the cobalt boroacylate is 0.5-3wt%, and the content of the styrene-indene resin is 1-3wt%.

[0009] A second aspect of the present invention provides a method for preparing a modified asphalt coating, which is carried out using the components of the composition described in the first aspect, and comprises the following steps:

[0010] (1) mixing the base asphalt and the solvent oil to obtain material A;

[0011] (2) performing a second mixing of the material A and the linear SBS to obtain material B;

[0012] (3) mixing the material B with SBR for the third time to obtain material C;

[0013] (4) mixing the material C with neodymium iron boron magnetic powder, cobalt boroacylate, and styrene-indene resin to obtain material D;

[0014] (5) The material D is mixed with an additive for the fifth time to obtain the modified asphalt coating material.

[0015] The third aspect of the present invention provides a modified asphalt coating prepared by the method described in the second aspect.

[0016] A fourth aspect of the present invention provides a waterproof roll material, comprising a reinforced metal aluminum foil membrane, a modified asphalt coating material, and an isolation membrane stacked in sequence;

[0017] The modified asphalt coating material is the modified asphalt coating material described in the third aspect.

[0018] The waterproof material provided by the present invention has at least excellent effects of heat preservation, low temperature resistance and deformation resistance.

[0019] The waterproof coiled material provided by the present invention can achieve long-term physical bonding with the metal roof. DETAILED DESCRIPTION

[0020] The endpoints of the ranges and any values disclosed herein are not limited to the precise ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values can be combined with each other to obtain one or more new numerical ranges, which should be considered to be specifically disclosed herein.

[0021] As mentioned above, the first aspect of the present invention provides a modified asphalt coating composition, which contains a main agent and an auxiliary agent, wherein the main agent includes base asphalt, solvent oil with an aromatic hydrocarbon content of ≥70wt%, linear SBS, SBR, NdFeB magnetic powder, cobalt boroacylate and styrene-indene resin;

[0022] Based on the total weight of the composition, the content of the matrix asphalt is 40-55wt%, the content of the solvent oil is 5-10wt%, the content of the linear SBS is 3-5wt%, the content of the SBR is 3-5wt%, the content of the neodymium iron boron magnetic powder is 2-6wt%, the content of the cobalt boroacylate is 0.5-3wt%, and the content of the styrene-indene resin is 1-3wt%.

[0023] After the NdFeB magnetic powder and cobalt boroacylate involved in the present invention are mixed, the NdFeB magnetic powder is bonded to the metal roof through its physical properties, and can exert a strong magnetic effect, thereby increasing the bonding effect between the modified asphalt material and the metal roof; at the same time, the cobalt boroacylate helps to disperse the material in the asphalt, because the center of the molecular structure is a boric acid group, which has amphoteric properties and can absorb acidic and alkaline substances in the rubber material, has a protective effect on the metal, and can effectively protect the metal base surface.

[0024] Preferably, the weight ratio of the NdFeB magnetic powder to the cobalt boroacylate is 2-4:1. The inventors have discovered that when a weight ratio of 2-4:1 of NdFeB magnetic powder to cobalt boroacylate is used in the modified asphalt coating of the present invention, the modified asphalt coating provided by the present invention can provide longer-term and sustained protection for metal roofs.

[0025] Preferably, the neodymium content in the NdFeB magnetic powder of the present invention is 29%-32.5% by weight, the iron content is 63.95-68.65% by weight, and the boron content is 1.1-1.2% by weight.

[0026] Preferably, the average particle diameter of the NdFeB magnetic powder is 30-40 μm.

[0027] Preferably, the maximum magnetic energy product of the NdFeB magnetic powder is ≥45 MGOe.

[0028] For example, the NdFeB magnetic powder of the present invention can be a product purchased from Nangong Naiyat Alloy Welding Materials Co., Ltd. with the brand name of strong magnetic powder.

[0029] Preferably, the cobalt content in the cobalt boroacylate is 21 wt% to 23.5 wt%.

[0030] Preferably, the solvent oil is furfural extracted oil.

[0031] The furfural extracted oil of the present invention is a petroleum fraction with aromatic hydrocarbons as main components.

[0032] Particularly preferably, the aromatic hydrocarbon content in the furfural extracted oil is 75-90 wt %. The inventors have found that under this preferred condition, the modified asphalt coating provided by the present invention can significantly and more effectively improve the low-temperature performance of the coiled material and enhance the bonding effect.

[0033] The SBS mentioned in the present invention represents a styrene-butadiene-styrene block copolymer.

[0034] Preferably, the density of the linear SBS of the present invention is 0.90-0.98 g / cm3; the content of styrene structural units is 29-33 wt%.

[0035] The SBR described in the present invention is styrene-butadiene rubber, also known as polystyrene butadiene copolymer.

[0036] Preferably, the raw rubber Mooney viscosity ML (1+4) of the SBR of the present invention at 100° C. is 60-78, and the content of bound styrene structural units is 20-25 wt %.

[0037] Preferably, the auxiliary agent includes a filler, and the content of the filler is 20-30 wt % based on the total weight of the composition.

[0038] More preferably, the filler is light calcium carbonate with an average particle diameter of 55-85 μm.

[0039] Particularly preferably, the softening point of the styrene-indene resin is 90-105° C. The inventors have found that under this preferred embodiment, the waterproof membrane provided by the present invention has the advantages of higher viscosity, better thermal insulation, low temperature resistance, and deformation resistance.

[0040] Preferably, the matrix asphalt is at least one of 50# petroleum asphalt, 70# petroleum asphalt and 90# petroleum asphalt.

[0041] As mentioned above, the second aspect of the present invention provides a method for preparing a modified asphalt coating, which is carried out using the components of the composition described in the first aspect, and comprises the following steps:

[0042] (1) mixing the base asphalt and the solvent oil to obtain material A;

[0043] (2) performing a second mixing of the material A and the linear SBS to obtain material B;

[0044] (3) mixing the material B with SBR for the third time to obtain material C;

[0045] (4) mixing the material C with neodymium iron boron magnetic powder, cobalt boroacylate, and styrene-indene resin to obtain material D;

[0046] (5) The material D is mixed with an additive for the fifth time to obtain the modified asphalt coating material.

[0047] Preferably, in step (1), the conditions for the first mixing include: a reaction temperature of 150-170° C., and a reaction time of 20-25 min.

[0048] Particularly preferably, in step (2), the conditions for the second mixing include: a reaction temperature of 150-170° C., a reaction time of 20-25 min, and a stirring rate of 1400-1600 rpm.

[0049] Preferably, in step (3), the conditions for the third mixing include: reaction temperature of 150-170° C., reaction time of 65-75 min, and stirring rate of 1400-1600 rpm.

[0050] Preferably, in step (4), the conditions for the fourth mixing include: a reaction temperature of 180-190° C., a reaction time of 180-190 min, and a stirring rate of 1400-1600 rpm.

[0051] Further preferably, in step (5), the conditions for the fifth mixing include: reaction temperature of 180-190° C., reaction time of 50-60 min, and stirring rate of 1400-1600 rpm.

[0052] As mentioned above, the third aspect of the present invention provides a modified asphalt coating prepared by the method described in the second aspect.

[0053] As mentioned above, the fourth aspect of the present invention provides a waterproof roll material, which comprises a reinforced metal aluminum foil membrane, a modified asphalt coating material, and an isolation membrane stacked in sequence;

[0054] The modified asphalt coating material is the modified asphalt coating material described in the third aspect.

[0055] Preferably, the reinforced metal aluminum foil film is a composite film of aluminum foil and PET film.

[0056] Preferably, the thickness of the PET film in the reinforced metal aluminum foil film is 0.06-0.08 mm.

[0057] More preferably, the isolation film is a PET silicone oil isolation film.

[0058] The present invention has no particular requirements for the preparation method of the waterproofing membrane. Those skilled in the art can employ commonly known methods in the art and apply the technical features of the first, second, and third aspects of the present invention to prepare the waterproofing membrane, such that the waterproofing membrane comprises a reinforced metal aluminum foil membrane, a modified asphalt coating, and a barrier membrane stacked in sequence. However, to achieve better results, the present invention provides a particularly preferred embodiment, wherein the preparation method of the waterproofing membrane comprises the following steps:

[0059] (S1) putting the reinforced metal aluminum foil film on the rack and stretching it to the discharge port;

[0060] (S2) There are two rollers in front of the discharge port with a spacing of 1-3 mm. The modified asphalt coating material of the present invention is applied to the aluminum foil surface of the reinforced metal aluminum foil film, and then the upper and lower rollers are used to compress it. After the compression is completed, an isolation film is applied;

[0061] (S3) The prototype roll is cooled in a water pool and then transported and rolled up on a conveyor belt to obtain a finished waterproof roll. The cooling temperature of the water pool is 30-40°C.

[0062] The present invention will be described in detail below by way of examples. In the following examples, unless otherwise specified, all instruments and raw materials used are commercially available.

[0063] Base asphalt: 70# petroleum asphalt, purchased from Maoming Branch of Sinopec;

[0064] Solvent oil: furfural extracted oil, purchased from Shandong Taichang Petrochemical Technology Co., Ltd., with an aromatic content of ≥80wt%;

[0065] Linear SBS: purchased from Lee Chang Jung Enterprises, trade name 3520, density 0.94 g / cm3, styrene structural unit content 31 wt%;

[0066] Star-shaped SBS: purchased from Lee Chang Jung Enterprises, trade number 3412; the content of styrene structural units is 33 wt%;

[0067] SBR-1: purchased from Shandong Haifang Rubber Technology Co., Ltd., trade name HK-B01; the raw rubber Mooney viscosity, ML(1+4) at 100°C is 75, and the content of bound styrene structural units is 22.5-24.5wt%.

[0068] SBR-2: purchased from Shandong Haifang Rubber Technology Co., Ltd., trade name HF-040; raw rubber Mooney viscosity, ML (1+4) 100 ° C is 55, the content of bound styrene structural units is 21.5-35wt%.

[0069] NdFeB magnetic powder: purchased from Nangong Naiyat Alloy Welding Materials Co., Ltd., the trade name is metal NdFeB strong magnetic powder N50, with an average particle diameter of 38 μm;

[0070] Cobalt boroacylate: purchased from Jiangyin Sanliang Rubber and Plastic New Materials Co., Ltd., trade name SL-BCo23;

[0071] Reinforced metal aluminum foil film: purchased from Shanghai Youpers Material Technology Co., Ltd., the brand is reinforced metal aluminum foil, the thickness of the aluminum foil is 0.9C (1C=0.01mm), and the thickness of the PET film is 0.08mm.

[0072] Alloy film: purchased from Shanghai Youpers Material Technology Co., Ltd., the brand is alloy aluminum-plated film, with a thickness of 0.03 mm.

[0073] Combination-1: The weight ratio of NdFeB magnetic powder to cobalt boroacylate is 3:1;

[0074] Combination-2: The weight ratio of NdFeB magnetic powder to cobalt boroacylate is 1.5:1;

[0075] Styrene-indene resin: purchased from Qingdao Haijia Additive Co., Ltd., with a softening point of 90-105°C;

[0076] Additive-1: filler, light calcium carbonate, purchased from Shandong Zhongtian Mining Co., Ltd., trade name is industrial grade light calcium carbonate ZT501, average particle diameter is 60 μm;

[0077] Additive-2: fly ash, purchased from Shijiazhuang Yuanjing Mineral Products Co., Ltd., 200 mesh.

[0078] Example 1

[0079] This embodiment is used to illustrate the preparation method of the modified asphalt coating material of the present invention, which includes the following steps:

[0080] (1) mixing the base asphalt and the solvent oil to obtain material A;

[0081] (2) performing a second mixing of the material A and the linear SBS to obtain material B;

[0082] (3) mixing the material B with SBR-1 for the third time to obtain material C;

[0083] (4) mixing the material C with combination 1 and styrene-indene resin for a fourth time to obtain material D;

[0084] (5) The material D is mixed with the additive-1 for the fifth time to obtain the modified asphalt coating material.

[0085] The adopted formula is specifically shown in Table 1, and the adopted process parameters are specifically shown in Table 2.

[0086] Example 2-Example 3

[0087] The method of Example 1 was followed, except that the formulations of the components and process parameters were different, as shown in Tables 1 and 2.

[0088] Table 1 (Total mass of modified asphalt coating material is 100g)

[0089] Example 1 Example 2 Example 3 Nomenclature of modified asphalt coating J-1 J-2 J-3 Base asphalt, dosage / g 50 52 50 Solvent oil, dosage / g 8 8 10 Linear SBS, dosage / g 4 3.8 3.9 SBR type SBR-1 SBR-1 SBR-1 Dosage / g 4 4 4.5 Neodymium iron boron magnetic powder and cobalt boroacylate type Combination-1 Combination-1 Combination-1 Dosage / g 7 7 7.5 Styrene-indene resin, dosage / g 2 2 2.5 additives type Additive-1 Additive-1 Additive-1 Dosage / g margin margin margin

[0090] Table 2

[0091] Example 1 Example 2 Example 3 First Mix Temperature / ℃ 160 150 170 Time / min 20 25 20 Second Mix Temperature / ℃ 160 150 170 Time / min 20 20 25 Speed / rpm 1500 1400 1600 Third Mix Temperature / ℃ 160 150 170 Time / min 70 65 75 Speed / rpm 1500 1400 1600 Fourth Mix Temperature / ℃ 185 180 190 Time / min 180 185 190 Speed / rpm 1500 1400 1600 Fifth Mix Temperature / ℃ 185 180 190 Time / min 50 55 60 Speed / rpm 1500 1400 1600

[0092] Example 4

[0093] This example was carried out by referring to the method of Example 1, except that, in the third mixing process, an equal weight of SBR-2 was used to replace the SBR-1 in Example 1. The remaining substances and amounts were the same as those in Example 1, to obtain waterproof material J-4.

[0094] Example 5

[0095] This example was carried out by referring to the method of Example 1, except that in the fifth mixing process, an equal weight of auxiliary agent-2 was used to replace the auxiliary agent-1 in Example 1, and the remaining substances and amounts were the same as in Example 1, to obtain waterproof material J-5.

[0096] Example 6

[0097] This example is carried out by referring to the method of Example 1, except that, in the fourth mixing process, an equal weight of combination-2 is used to replace combination-1 in Example 1, and the remaining substances and amounts are the same as those in Example 1, to obtain waterproof material J-6.

[0098] Comparative Example 1

[0099] This comparative example was carried out by referring to the method of Example 1, except that, in the second mixing process, 2 g of star-shaped SBS was used instead of 2 g of linear SBS in Example 1. The remaining substances and amounts were the same as those in Example 1, to obtain waterproof material DJ-1.

[0100] Comparative Example 2

[0101] This comparative example was carried out by referring to the method of Example 1, except that Combination 1 was not used in the fourth mixing process, and the amount of the auxiliary agent was increased to 7 g in the fifth mixing process to obtain waterproof material DJ-2.

[0102] Comparative Example 3

[0103] This example was carried out in accordance with the method of Example 1, except that in the fourth mixing process, styrene-indene resin was not used, and in the fifth mixing process, the amount of the auxiliary agent was increased by 2 g to obtain waterproof material DJ-4.

[0104] Preparation example: Using modified asphalt coating material to prepare waterproof membrane

[0105] The preparation method of waterproof membrane is as follows:

[0106] (S1) putting the reinforced metal aluminum foil film on the rack and stretching it to the discharge port;

[0107] (S2) There are two rollers with a spacing of 2 mm in front of the discharge port. The modified asphalt coating material in the embodiment or comparative example is applied to the aluminum foil surface of the reinforced metal aluminum foil film, and then the upper and lower rollers are used to compress it. After the compression is completed, an isolation film is covered;

[0108] (S3) The prototype roll is cooled in a water pool (where the temperature of the cooling water is 30-40°C), and then transported and rolled up on a conveyor belt to obtain a finished waterproof roll.

[0109] Test Case

[0110] Some properties of the waterproof membrane prepared in Preparation Example were tested in accordance with the national standard GB23441-2009. The test results are shown in Table 3. The aluminum sheet mentioned in the national standard was replaced with a steel sheet, specifically a 1 mm thick color-coated steel sheet.

[0111] Table 3

[0112]

[0113]

[0114] It can be seen from the results in Table 3 that the waterproof membrane provided by the present invention has better thermal insulation, low temperature resistance and adhesion to metal roofs.

[0115] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be regarded as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A modified asphalt coating composition, characterized in that: The composition contains a main agent and an auxiliary agent, wherein the main agent includes matrix asphalt, solvent oil with an aromatic hydrocarbon content of ≥70wt%, linear SBS, SBR, NdFeB magnetic powder, cobalt boroacylate and styrene-indene resin; Based on the total weight of the composition, the content of the matrix asphalt is 40-55wt%, the content of the solvent oil is 5-10wt%, the content of the linear SBS is 3-5wt%, the content of the SBR is 3-5wt%, the content of the neodymium iron boron magnetic powder is 2-6wt%, the content of the cobalt boroacylate is 0.5-3wt%, and the content of the styrene-indene resin is 1-3wt%.

2. The composition according to claim 1, characterized in that The SBR has a raw rubber Mooney viscosity ML (1+4) of 60-78 at 100°C and a content of bound styrene structural units of 20-25 wt%; And / or, the solvent oil is furfural extracted oil.

3. The composition according to claim 1 or 2, characterized in that The weight ratio of the NdFeB magnetic powder to the cobalt boroacylate is 2-4:1; And / or, the average particle diameter of the NdFeB magnetic powder is 30-40 μm; And / or, the maximum magnetic energy product of the NdFeB magnetic powder is ≥45 MGOe; and / or, the cobalt content in the cobalt boroacylate is 21 wt% to 23.5 wt%; And / or, the auxiliary agent includes a filler; based on the total weight of the composition, the content of the filler is 20-30wt%; And / or, the filler is light calcium carbonate with an average particle diameter of 55-85 μm.

4. The composition according to any one of claims 1 to 3, characterized in that The softening point of the styrene-indene resin is 75-135°C.

5. A method for preparing a modified asphalt coating, characterized in that: The method is carried out using the components of the composition according to any one of claims 1 to 4, and comprises the following steps: (1) mixing the base asphalt and the solvent oil to obtain material A; (2) performing a second mixing of the material A and the linear SBS to obtain material B; (3) mixing the material B with SBR for the third time to obtain material C; (4) mixing the material C with neodymium iron boron magnetic powder, cobalt boroacylate, and styrene-indene resin to obtain material D; (5) The material D is mixed with an additive for the fifth time to obtain the modified asphalt coating material.

6. The method according to claim 5, characterized in that In step (1), the first mixing conditions include: reaction temperature of 150-170°C, reaction time of 20-25 min; and / or, in step (2), the second mixing conditions include: a reaction temperature of 150-170° C., a reaction time of 20-25 min, and a stirring rate of 1400-1600 rpm; and / or, in step (3), the conditions of the third mixing include: a reaction temperature of 150-170° C., a reaction time of 65-75 min, and a stirring rate of 1400-1600 rpm; and / or, in step (4), the conditions of the fourth mixing include: a reaction temperature of 180-190° C., a reaction time of 180-190 min, and a stirring rate of 1400-1600 rpm; And / or, in step (5), the conditions of the fifth mixing include: reaction temperature of 180-190° C., reaction time of 50-60 min, and stirring rate of 1400-1600 rpm.

7. The modified asphalt coating material prepared by the method according to claim 5 or 6.

8. A waterproof roll, characterized in that: The waterproof roll material comprises a reinforced metal aluminum foil membrane, a modified asphalt coating material and an isolation membrane which are stacked in sequence; The modified asphalt coating material is the modified asphalt coating material described in claim 7.

9. The waterproof roll according to claim 8, characterized in that: The reinforced metal aluminum foil film is a composite film of aluminum foil and PET film; And / or, the thickness of the PET film in the reinforced metal aluminum foil film is 0.06-0.08 mm.

10. The waterproof roll according to claim 9, characterized in that: The isolation film is a PET silicone oil isolation film.

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