Asphalt for waterproof coiled material, preparation method of asphalt, waterproof coiled material and preparation method of waterproof coiled material

Abstract

The invention provides asphalt for a waterproof coiled material, a preparation method of the asphalt, the waterproof coiled material and a preparation method of the waterproof coiled material, and the asphalt is prepared from the following raw materials in parts by mass: 60-70 parts of intermediate base crude oil and / or naphthenic base crude oil, 0-20 parts of paraffin base crude oil and 20-30 parts of waste tire pyrolysis oil. The raw materials can effectively improve the application of the asphalt in the waterproof coiled material, and enhance the peel strength and low-temperature flexibility of the waterproof coiled material. The viscosity of the waterproof coiled material in the preparation process can be reduced, so that the generation energy consumption is reduced, and the dual benefits of resource recycling and environmental protection are realized.

Description

Technical Field

[0001] This invention belongs to the field of petroleum refining technology, and particularly relates to a waterproof membrane asphalt and its preparation method, and a waterproof membrane and its preparation method. Background Technology

[0002] With the rapid advancement of my country's economic construction, especially the rapid expansion of infrastructure, the demand for waterproofing materials has continued to rise, and their application scope has also expanded rapidly. On October 24, 2022, new waterproofing regulations officially came into effect, setting higher standards for building waterproofing and requiring that the service life of waterproofing membranes match the design life of the waterproofing project. The main factors affecting the leakage of waterproofing membranes include the membrane's high and low temperature performance and peel strength.

[0003] Currently, the asphalt commonly used in waterproof membranes on the market has problems such as insufficient high and low temperature performance and easy aging, resulting in a short service life of waterproof membranes that cannot meet the requirements of the new regulations. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a waterproof membrane asphalt and a method for preparing the same, and a waterproof membrane and a method for preparing the same, wherein the waterproof membrane prepared from the waterproof asphalt has excellent low-temperature performance and high peel strength.

[0005] This invention provides an asphalt for waterproof membranes, wherein the raw materials for preparation, by weight, include the following:

[0006] 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil.

[0007] Preferably, the residual carbon content of the waste tire pyrolysis oil is 1-3%, the ash content is <1%, the asphalt content is <1%, and the density at 20°C is 900-950 kg / m³. 3 Impurities <0.2%.

[0008] Preferably, 10-20 parts of paraffin-based crude oil are used.

[0009] This invention provides a method for preparing asphalt for waterproof membranes as described in the above-mentioned technical solution, comprising the following steps:

[0010] Mix 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil evenly, and treat with atmospheric and vacuum distillation to obtain asphalt for waterproof membranes.

[0011] Preferably, the final temperature of the atmospheric and vacuum distillation treatment is <480℃.

[0012] This invention provides a waterproof membrane material, comprising the following raw materials by weight:

[0013] 25-30 parts of the asphalt used in the waterproof membrane described in the above technical solution; 23-28 parts of W200;

[0014] 2.0~3.0 parts SBS; 10~13 parts adhesive powder and 30~33 parts inorganic filler.

[0015] Preferably, the waterproof membrane uses asphalt with a penetration of 30~60mm at 25℃, a softening point >49℃, and a low-temperature flexibility <5℃.

[0016] Preferably, W200 has a penetration of 190~220dmm at 0℃, a softening point >16℃, a low-temperature flexibility <-25℃, and a rotational viscosity of 1500~2000mPa·S at 60℃.

[0017] This invention provides a method for preparing the waterproof membrane material described in the above technical solution, comprising the following steps:

[0018] The waterproof membrane is heated to 175-180℃ with asphalt, and W200 and SBS are added while stirring. After being dispersed evenly, it is ground and then heated to 185-190℃. Adhesive powder is added and stirring is continued. Inorganic filler is added and stirred evenly to obtain the waterproof membrane material.

[0019] Preferably, the mesh size of the adhesive powder is 35-45 mesh.

[0020] This invention provides an asphalt for waterproof membranes, comprising, by weight, the following raw materials: 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil. These raw materials effectively improve the application of asphalt in waterproof membrane materials, enhancing the peel strength and low-temperature flexibility of the waterproof membrane. They also reduce the viscosity of the waterproof membrane during preparation, thereby reducing energy consumption and achieving the dual benefits of resource recycling and environmental protection. Detailed Implementation

[0021] This invention provides an asphalt for waterproof membranes, wherein the raw materials for preparation, by weight, include the following:

[0022] 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil.

[0023] The raw materials for preparing asphalt provided by this invention include 60-70 parts of intermediate-base crude oil and / or naphthenic crude oil, specifically in amounts of 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or 70 parts. In a specific embodiment, the mass ratio of the intermediate-base crude oil to the naphthenic crude oil is 3:7. The intermediate-base crude oil used in this invention has the following characteristics: first key fraction at 250-275°C, specific gravity index 33-40; second key fraction at 395-425°C, specific gravity index 20-30. The naphthenic crude oil has the following characteristics: first key fraction at 250-275°C, specific gravity index <33; second key fraction at 395-425°C, specific gravity index 10-20.

[0024] The raw materials for preparing asphalt provided by this invention include 0 to 20 parts of paraffin-based crude oil, specifically 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 20 parts; preferably 10 to 20 parts. The paraffin-based crude oil used in this invention has a first key fraction at 250-275°C and a specific gravity index >40, and a second key fraction at 395-425°C and a specific gravity index >30.

[0025] The raw material for preparing asphalt provided by this invention includes 20-30 parts of waste tire pyrolysis oil, specifically 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, or 30 parts. The waste tire pyrolysis oil is obtained through a high-temperature pyrolysis process of waste tires. The residual carbon content of the waste tire pyrolysis oil is 1-3%, ash content <1%, asphaltene content <1%, and density at 20℃ is 900-950 kg / m³. 3 Impurities <0.2%.

[0026] This invention uniformly mixes the three raw materials mentioned above in specific amounts, and then processes them through an atmospheric and vacuum distillation unit. This not only significantly improves the yield of gasoline and diesel fuel, but also effectively enhances the performance of asphalt in waterproof membranes, increasing the peel strength and low-temperature flexibility of the asphalt waterproof membranes. Furthermore, this process reduces the viscosity of the membrane during preparation, thereby reducing production energy consumption. This measure achieves the dual benefits of resource recycling and environmental protection.

[0027] The physicochemical parameters of the asphalt prepared in specific embodiments of the present invention are as follows: asphalt penetration at 25°C is 45 dmm, softening point is 51°C, low-temperature flexibility is 4°C, and adhesion is 1.78 N / mm; or asphalt penetration at 25°C is 40 dmm, softening point is 51°C, low-temperature flexibility is 5°C, and adhesion is 2.14 N / mm; or asphalt penetration at 25°C is 37 dmm, softening point is 50°C, low-temperature flexibility is 5°C, and adhesion is 1.98 N / mm; or asphalt penetration at 25°C is 40 dmm, softening point is 50°C, low-temperature flexibility is 4°C, and adhesion is 2.07 N / mm.

[0028] The present invention also provides a method for preparing the asphalt for waterproof membranes described in the above technical solution, comprising the following steps:

[0029] Mix 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil evenly, and treat with atmospheric and vacuum distillation to obtain asphalt for waterproof membranes.

[0030] In this invention, the final temperature of the atmospheric and vacuum distillation treatment is <480℃; in specific embodiments, the temperature of the atmospheric and vacuum distillation treatment is 460℃, 470℃, or 473℃.

[0031] This invention provides a waterproof membrane material, comprising the following raw materials by weight:

[0032] 25-30 parts of the asphalt used in the waterproof membrane described in the above technical solution; 23-28 parts of W200;

[0033] 2.0~3.0 parts SBS; 10~13 parts adhesive powder and 30~33 parts inorganic filler.

[0034] In this invention, the amount of asphalt used in the waterproof membrane is 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, or 30 parts. The asphalt used in the waterproof membrane has a penetration of 30-60 mm at 25°C, a softening point >49°C, and a low-temperature flexibility <5°C.

[0035] The specific dosage of W200 is 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, or 28 parts. The W200 described in this invention has a penetration of 190~220 dmm at 0℃, a softening point >16℃, low-temperature flexibility <-25℃, and a rotational viscosity of 1500~2000 mPa·s at 60℃.

[0036] The specific dosage of SBS is 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 or 3.0 parts.

[0037] The specific amount of adhesive powder used is 10 parts, 11 parts, 12 parts, or 13 parts. The mesh size of the adhesive powder is 35-45 mesh, specifically 35 mesh, 40 mesh, or 45 mesh.

[0038] The specific dosage of the inorganic filler is 30 parts, 31 parts, 32 parts, or 33 parts. The inorganic filler is selected from one or more of talc powder, fly ash, and stone powder.

[0039] In a specific embodiment, the raw materials for the waterproof membrane include 27 parts of the asphalt described in the above technical solution, 26 parts of W200, 3 parts of SBS, 13 parts of adhesive powder, and 31 parts of inorganic filler.

[0040] The present invention also provides a method for preparing the waterproof membrane described in the above technical solution, comprising the following steps:

[0041] The waterproof membrane is made by heating asphalt to 175-180℃, adding W200 and SBS while stirring, dispersing evenly, grinding, heating again to 185-190℃, adding adhesive powder, continuing to stir, adding inorganic filler, and stirring evenly to obtain the waterproof membrane.

[0042] The preparation method provided by this invention is simple, mild, and easy to control, and has broad application prospects.

[0043] To further illustrate the present invention, the following detailed description, in conjunction with embodiments, provides an example of an asphalt for waterproof membrane and its preparation method, as well as a waterproof membrane and its preparation method. However, these descriptions should not be construed as limiting the scope of protection of the present invention.

[0044] Example 1

[0045] 60 parts of intermediate / naphthenic crude oil (mass ratio of intermediate crude oil to naphthenic crude oil 3:7), 20 parts of paraffinic crude oil, and 20 parts of waste tire pyrolysis oil were mixed evenly and then processed by atmospheric and vacuum distillation at a temperature of 465℃ to obtain the corresponding asphalt. The physicochemical parameters are shown in Table 1.

[0046] Table 1

[0047]

[0048] Heat 27 parts of the asphalt to 175℃~180℃, add 26 parts of W200 asphalt and 3 parts of SBS under stirring until evenly dispersed, then further grind through a colloid mill with a grinding gap of 0.2~0.3mm, then heat to 185-190℃, add 13 parts of 40-mesh rubber powder, continue stirring for 1 hour, add 31 parts of stone powder under stirring, and stir for 1 hour.

[0049] Example 2

[0050] 70 parts of intermediate / naphthenic crude oil (mass ratio of intermediate crude oil to naphthenic crude oil 3:7), 10 parts of paraffinic crude oil, and 20 parts of waste tire pyrolysis oil were mixed evenly and then processed by atmospheric and vacuum distillation at a temperature of 470℃ to obtain the corresponding asphalt. The physicochemical parameters are shown in Table 2.

[0051] Table 2

[0052]

[0053] Heat 27 parts of the asphalt to 175℃~180℃, add 26 parts of W200 asphalt and 3 parts of SBS under stirring until evenly dispersed, then further grind through a colloid mill with a grinding gap of 0.2~0.3mm, then heat to 185~190℃, add 13 parts of 40-mesh rubber powder, continue stirring for 1 hour, add 31 parts of inorganic filler under stirring, and stir for 1 hour.

[0054] Example 3

[0055] 70 parts of intermediate / naphthenic crude oil (mass ratio of intermediate crude oil to naphthenic crude oil 3:7), 0 parts of paraffinic crude oil, and 30 parts of waste tire pyrolysis oil were mixed evenly and then processed by atmospheric and vacuum distillation at a temperature of 473℃ to obtain the corresponding asphalt. The physicochemical parameters are shown in Table 3.

[0056] Table 3

[0057]

[0058] Heat 27 parts of the asphalt to 175℃~180℃, add 26 parts of W200 asphalt and 3 parts of SBS under stirring until evenly dispersed, then further grind through a colloid mill with a grinding gap of 0.2~0.3mm, then heat to 185~190℃, add 13 parts of 40-mesh rubber powder, continue stirring for 1 hour, add 31 parts of inorganic filler under stirring, and stir for 1 hour.

[0059] Example 4

[0060] 65 parts of intermediate / naphthenic crude oil (mass ratio of intermediate crude oil to naphthenic crude oil 3:7), 15 parts of paraffinic crude oil, and 25 parts of waste tire pyrolysis oil were mixed evenly and then processed by atmospheric and vacuum distillation at a temperature of 470℃ to obtain the corresponding asphalt. The physicochemical parameters are shown in Table 4.

[0061] Table 4

[0062]

[0063] Heat 27 parts of the asphalt to 175℃~180℃, add 26 parts of W200 asphalt and 3 parts of SBS under stirring until evenly dispersed, then further grind through a colloid mill with a grinding gap of 0.2~0.3mm, then heat to 185~190℃, add 13 parts of 40-mesh rubber powder, continue stirring for 1 hour, add 31 parts of inorganic filler under stirring, and stir for 1 hour.

[0064] Comparative Example 1

[0065] Heat 27 parts of No. 70 asphalt to 175℃~180℃, add 26 parts of W200 asphalt and 3 parts of SBS under stirring until evenly dispersed, then grind further through a colloid mill with a grinding gap of 0.2~0.3mm, then heat to 185~190℃, add 13 parts of 40-mesh rubber powder, continue stirring for 1 hour, then add 31 parts of inorganic filler and stir for 1 hour.

[0066] The viscosity, softening point, low-temperature flexibility, and peel strength of the products from Examples 1-4 and Comparative Example 1 are compared, as shown in Table 5:

[0067] Table 5

[0068]

[0069] As can be seen from the above comparative examples, the coating layer prepared using the present invention has significant advantages in peel strength and low-temperature flexibility.

[0070] As can be seen from the above embodiments, the present invention provides an asphalt for waterproof membranes. The raw materials, by weight, include: 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil. These raw materials can effectively improve the application of asphalt in waterproof membrane materials, enhancing the peel strength and low-temperature flexibility of the waterproof membrane. They can also reduce the viscosity of the waterproof membrane during the preparation process, thereby reducing energy consumption and achieving the dual benefits of resource recycling and environmental protection. Experimental results show that the viscosity of the waterproof membrane at 180℃ is 120-130 dPa·s; the extreme low temperature is -26.2 to -28.1℃; and the peel strength between membrane seams is 2.53-2.95 N / mm.

[0071] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A type of bitumen for waterproof membranes, comprising the following raw materials in parts by weight: 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil.

2. The asphalt for waterproof membrane according to claim 1, characterized in that, The residual carbon content of the waste tire pyrolysis oil is 1-3%, ash content is <1%, asphaltene content is <1%, and density at 20℃ is 900-950 kg / m³. 3 Impurities <0.2%.

3. The asphalt for waterproof membrane according to claim 1, characterized in that, 10-20 parts of paraffin-based crude oil.

4. A method for preparing bitumen for waterproof membranes according to any one of claims 1 to 3, comprising the following steps: Mix 60-70 parts of intermediate-based crude oil and / or naphthenic crude oil, 0-20 parts of paraffinic crude oil, and 20-30 parts of waste tire pyrolysis oil evenly, and treat with atmospheric and vacuum distillation to obtain asphalt for waterproof membranes.

5. The preparation method according to claim 4, characterized in that, The final temperature of the atmospheric and vacuum distillation treatment is <480℃.

6. A waterproof membrane, comprising, by weight parts: 25-30 parts of bitumen for waterproof membranes as described in any one of claims 1-3; 23-28 parts of W200; 2.0~3.0 parts SBS; 10~13 parts adhesive powder and 30~33 parts inorganic filler.

7. The waterproof membrane according to claim 6, characterized in that, The waterproof membrane uses asphalt with a penetration of 30-60 mm at 25°C, a softening point of >49°C, and a low-temperature flexibility of <5°C.

8. The waterproof membrane according to claim 6, characterized in that, W200 has a penetration of 190~220 dmm at 0℃, a softening point >16℃, low-temperature flexibility <-25℃, and a rotational viscosity of 1500~2000 mPa·S at 60℃.

9. The preparation method according to claim 6, characterized in that, The mesh size of the adhesive powder is 35-45 mesh.

10. A method for preparing the waterproof membrane according to claim 6, comprising the following steps: The waterproof membrane is made by heating asphalt to 175-180℃, adding W200 and SBS while stirring, dispersing evenly, grinding, heating again to 185-190℃, adding adhesive powder, continuing to stir, adding inorganic filler, and stirring evenly to obtain the waterproof membrane.

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