Preparation method of low-temperature anti-falling asphalt damping plate

Abstract

The invention relates to the technical field of asphalt damping materials, in particular to a preparation method of a low-temperature anti-falling asphalt damping plate which comprises the following components in parts by weight: 55-75 parts of asphalt, 15-20 parts of tackifying resin, 5-10 parts of rubber powder, 3-5 parts of a fiber material, 15-20 parts of inorganic filler and 2-3 parts of an anti-stripping agent. According to the preparation method of the low-temperature anti-falling asphalt damping plate, the SBS can improve the flexibility and low-temperature crack resistance of the asphalt, the asphalt is not prone to embrittlement in a low-temperature environment, the terpene resin has a good tackifying effect, the cohesiveness of the asphalt with other materials and an attached surface is enhanced, the rubber powder can improve the elasticity and toughness of the damping plate, and the anti-falling performance of the damping plate is improved. The glass fiber can enhance the overall strength of the damping plate and prevent the damping plate from deforming in the using process, the inorganic filler improves the heat resistance and stability of the damping plate, and the amine anti-stripping agent can effectively prevent the phenomenon that asphalt is stripped from other materials at low temperature.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt damping materials, and in particular to a method for preparing a low-temperature anti-shedding asphalt damping plate. Background Art

[0002] Asphalt damping plates are widely used in the fields of automobiles, construction, etc. for shock absorption and noise reduction. However, there are some problems with the existing asphalt damping plates. In low temperature environments, the flexibility of asphalt decreases and it is easy to become brittle, resulting in poor adhesion between the damping plate and the attached surface, and it is easy to fall off. Secondly, in the preparation process of traditional asphalt damping plates, the selection and proportion of raw materials and the preparation process fail to take into account both low-temperature performance and anti-falling performance. This not only affects the use effect of the damping plate, but may also shorten its service life and increase maintenance costs. In order to solve the above problems, we proposed a preparation method for low-temperature anti-falling asphalt damping plates. Summary of the invention

[0003] The main purpose of the present invention is to provide a method for preparing a low-temperature anti-shedding asphalt damping plate, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A method for preparing a low-temperature anti-shedding asphalt damping plate. The components and weight composition of the low-temperature anti-shedding asphalt damping plate include: 55-75 parts of asphalt, 15-20 parts of tackifying resin, 5-10 parts of rubber powder, 3-5 parts of fiber material, 15-20 parts of inorganic filler, and 2-3 parts of anti-stripping agent.

[0006] Preferably, the asphalt is modified asphalt with a softening point of 80-90° C. The base asphalt is modified with SBS (styrene-butadiene-styrene block copolymer), and the added amount of SBS is 3-5% of the mass of the base asphalt.

[0007] Preferably, the tackifying resin is a terpene resin having a softening point of 100-110°C.

[0008] Preferably, the rubber powder is waste tire rubber powder, and its particle size is 80-120 mesh.

[0009] Preferably, the fiber material is glass fiber, and its length is 3-5 mm.

[0010] Preferably, the inorganic filler is a mixture of mica powder and talc powder, wherein the mass ratio of mica powder to talc powder is 2:1, and the particle size is 200-300 mesh.

[0011] Preferably, the anti-stripping agent is an amine anti-stripping agent.

[0012] The present invention also provides a method for preparing a low-temperature anti-falling asphalt damping plate, which specifically comprises the following steps:

[0013] (1) Prepared according to specific components and weight composition: asphalt, tackifying resin, rubber powder, fiber material, inorganic filler, anti-stripping agent;

[0014] (2) premixing the weighed rubber powder, fiber material, inorganic filler and anti-stripping agent in a high-speed mixer for 6-11 minutes at a mixing speed of 1000-1500 r / min to obtain a premix;

[0015] (3) Heat the modified asphalt to 150-160°C to completely melt it;

[0016] (4) adding a tackifying resin to the molten asphalt and stirring evenly at a stirring speed of 400-500 r / min for 20-25 minutes to obtain a mixed asphalt;

[0017] (5) adding the premix to the mixed asphalt and continuing to stir at a stirring speed of 400-600 r / min for 25-35 minutes to obtain a damping plate mixture;

[0018] (6) Pour the damping plate mixture into a mold while it is hot, and press it with a roller press at a pressing pressure of 5-10 MPa to obtain a damping plate blank;

[0019] (7) The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent with a spraying amount of 0.1-0.2g / m 2 ;

[0020] (8) The prepared asphalt damping plates are subjected to quality inspection, including thickness, density, adhesion (a pull-out test is used to test the bonding strength with the steel plate at a low temperature of -20°C), damping performance, etc. Qualified products are packaged.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. A method for preparing a low-temperature anti-shedding asphalt damping plate, using SBS-modified asphalt, SBS can improve the flexibility and low-temperature crack resistance of asphalt, and it is not easy to become brittle under low temperature environment, terpene resin is used as a tackifying resin, which has a good tackifying effect and can enhance the adhesion between asphalt and other materials and the attached surface, the addition of waste tire rubber powder can improve the elasticity and toughness of the damping plate on the one hand, and recycle waste resources on the other hand, glass fiber can enhance the overall strength of the damping plate and prevent it from deformation during use, the inorganic filler composed of mica powder and talcum powder can not only reduce the cost, but also improve the heat resistance and stability of the damping plate, and the amine anti-stripping agent can effectively prevent the peeling of asphalt and other materials at low temperatures.

[0023] 2. A method for preparing a low-temperature anti-shedding asphalt damping plate. The asphalt damping plate prepared by the present invention has good flexibility in a low-temperature environment and is not easy to become brittle, effectively preventing the shedding phenomenon caused by low temperature and improving the service life of the damping plate. Through reasonable raw material selection and ratio and preparation process, the adhesion, damping performance and overall strength of the damping plate are improved, which can better meet the shock absorption and noise reduction needs in the fields of automobiles and construction. The present invention uses waste tire rubber powder as raw material, realizes the recycling of some waste resources, and has certain environmental protection significance. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] The method for preparing a low-temperature anti-shedding asphalt damping plate comprises the following components and weight compositions: 55-75 parts of asphalt, 15-20 parts of tackifying resin, 5-10 parts of rubber powder, 3-5 parts of fiber material, 15-20 parts of inorganic filler, and 2-3 parts of anti-stripping agent.

[0026] The asphalt is modified asphalt with a softening point of 80-90°C. The base asphalt is modified with SBS (styrene-butadiene-styrene block copolymer), and the added amount of SBS is 3-5% of the mass of the base asphalt.

[0027] The tackifying resin is a terpene resin, and its softening point is 100-110°C.

[0028] The rubber powder is waste tire rubber powder, and its particle size is 80-120 mesh.

[0029] The fiber material is glass fiber, and its length is 3-5mm.

[0030] The inorganic filler is a mixture of mica powder and talc powder, wherein the mass ratio of the mica powder to the talc powder is 2:1, and the particle size is 200-300 meshes.

[0031] The anti-stripping agent is an amine anti-stripping agent.

[0032] Example 1

[0033] The specific steps of the production method are as follows:

[0034] Weigh by weight: 55 parts of asphalt, 15 parts of tackifying resin, 5 parts of rubber powder, 3 parts of fiber material, 15 parts of inorganic filler, and 2 parts of anti-stripping agent.

[0035] The weighed rubber powder, fiber material, inorganic filler and anti-stripping agent were premixed in a high-speed mixer for 6 minutes at a mixing speed of 1000 r / min to obtain a premix.

[0036] Heat the modified asphalt to 150°C to completely melt it.

[0037] Add tackifying resin to the molten asphalt and stir evenly at a stirring speed of 400 r / min for 20 minutes to obtain mixed asphalt.

[0038] Add the premix to the mixed asphalt and continue stirring at a speed of 400 r / min for 25 minutes to obtain a damping plate mixture. Pour the damping plate mixture into a mold while hot and press it with a roller press at a pressing pressure of 5 MPa to obtain a damping plate blank.

[0039] The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent with a spraying amount of 0.1g / m 2 .

[0040] The prepared asphalt damping plates are subjected to quality inspection, and the inspection items include thickness, density, adhesion (a pull-out test is used to test the bonding strength with the steel plate at a low temperature of -20°C), damping performance, etc. Qualified products are packaged.

[0041] Example 2

[0042] The specific steps of the production method are as follows:

[0043] Weigh by weight: 60 parts of asphalt, 16 parts of tackifying resin, 6 parts of rubber powder, 4 parts of fiber material, 16 parts of inorganic filler, and 2.5 parts of anti-stripping agent.

[0044] The weighed rubber powder, fiber material, inorganic filler and anti-stripping agent were premixed in a high-speed mixer for 7 minutes at a mixing speed of 1100 r / min to obtain a premix.

[0045] The modified asphalt is heated to 155°C to completely melt it.

[0046] Add tackifying resin to the molten asphalt and stir evenly at a stirring speed of 450 r / min for 21 minutes to obtain mixed asphalt.

[0047] Add the premix into the mixed asphalt and continue stirring at a speed of 450 r / min for 28 minutes to obtain a damping plate mixture. Pour the damping plate mixture into a mold while hot and press it with a roller press at a pressing pressure of 6 MPa to obtain a damping plate blank.

[0048] The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent with a spraying amount of 0.13g / m 2 .

[0049] The prepared asphalt damping plates are subjected to quality inspection, and the inspection items include thickness, density, adhesion (a pull-out test is used to test the bonding strength with the steel plate at a low temperature of -20°C), damping performance, etc. Qualified products are packaged.

[0050] Example 3

[0051] The specific steps of the production method are as follows:

[0052] Weigh by weight: 65 parts of asphalt, 17 parts of tackifying resin, 7 parts of rubber powder, 4.5 parts of fiber material, 17 parts of inorganic filler, and 2.7 parts of anti-stripping agent.

[0053] The weighed rubber powder, fiber material, inorganic filler and anti-stripping agent were premixed in a high-speed mixer for 8 minutes at a mixing speed of 1200 r / min to obtain a premix.

[0054] The modified asphalt is heated to 158°C to completely melt it.

[0055] Add tackifying resin to the molten asphalt and stir evenly at a stirring speed of 480 r / min for 22 minutes to obtain mixed asphalt.

[0056] Add the premix to the mixed asphalt and continue stirring at a speed of 500 r / min for 30 minutes to obtain a damping plate mixture. Pour the damping plate mixture into a mold while hot and press it with a roller press at a pressing pressure of 7 MPa to obtain a damping plate blank.

[0057] The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent with a spraying amount of 0.15g / m 2 .

[0058] The prepared asphalt damping plates are subjected to quality inspection, and the inspection items include thickness, density, adhesion (a pull-out test is used to test the bonding strength with the steel plate at a low temperature of -20°C), damping performance, etc. Qualified products are packaged.

[0059] Example 4

[0060] The specific steps of the production method are as follows:

[0061] Weigh by weight: 70 parts of asphalt, 18 parts of tackifying resin, 8 parts of rubber powder, 4.8 parts of fiber material, 18 parts of inorganic filler, and 2.8 parts of anti-stripping agent.

[0062] The weighed rubber powder, fiber material, inorganic filler and anti-stripping agent were premixed in a high-speed mixer for 10 minutes at a mixing speed of 1300 r / min to obtain a premix.

[0063] The modified asphalt is heated to 159°C to completely melt it.

[0064] Add tackifying resin to the molten asphalt and stir evenly at a stirring speed of 490 r / min for 23 minutes to obtain mixed asphalt.

[0065] Add the premix into the mixed asphalt and continue stirring at a speed of 550 r / min for 33 minutes to obtain a damping plate mixture. Pour the damping plate mixture into a mold while hot and press it with a roller press at a pressure of 8 MPa to obtain a damping plate blank.

[0066] The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent with a spraying amount of 0.17g / m 2 .

[0067] The prepared asphalt damping plates are subjected to quality inspection, and the inspection items include thickness, density, adhesion (a pull-out test is used to test the bonding strength with the steel plate at a low temperature of -20°C), damping performance, etc. Qualified products are packaged.

[0068] Example 5

[0069] The specific steps of the production method are as follows:

[0070] Weigh by weight: 75 parts of asphalt, 20 parts of tackifying resin, 10 parts of rubber powder, 5 parts of fiber material, 20 parts of inorganic filler, and 3 parts of anti-stripping agent.

[0071] The weighed rubber powder, fiber material, inorganic filler and anti-stripping agent were premixed in a high-speed mixer for 11 minutes at a mixing speed of 1500 r / min to obtain a premix.

[0072] Heat the modified asphalt to 160°C to completely melt it.

[0073] Add tackifying resin to the molten asphalt and stir evenly at a stirring speed of 500 r / min for 25 minutes to obtain mixed asphalt.

[0074] Add the premix into the mixed asphalt and continue stirring at a speed of 600 r / min for 35 minutes to obtain a damping plate mixture. Pour the damping plate mixture into a mold while hot and press it with a roller press at a pressure of 10 MPa to obtain a damping plate blank.

[0075] The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent with a spraying amount of 0.2g / m 2 .

[0076] The prepared asphalt damping plates are subjected to quality inspection, and the inspection items include thickness, density, adhesion (a pull-out test is used to test the bonding strength with the steel plate at a low temperature of -20°C), damping performance, etc. Qualified products are packaged.

[0077] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for preparing a low-temperature anti-shedding asphalt damping plate, characterized in that: The components and weight composition of the low-temperature anti-stripping asphalt damping plate include: 55-75 parts of asphalt, 15-20 parts of tackifying resin, 5-10 parts of rubber powder, 3-5 parts of fiber material, 15-20 parts of inorganic filler, and 2-3 parts of anti-stripping agent.

2. The method for preparing a low-temperature anti-shedding asphalt damping plate according to claim 1, characterized in that: The asphalt is modified asphalt with a softening point of 80-90° C. SBS (styrene-butadiene-styrene block copolymer) is used to modify the base asphalt, and the added amount of SBS is 3-5% of the mass of the base asphalt.

3. The method for preparing a low-temperature anti-shedding asphalt damping plate according to claim 1, characterized in that: The tackifying resin is a terpene resin, and its softening point is 100-110°C.

4. The method for preparing a low-temperature anti-shedding asphalt damping plate according to claim 1, characterized in that: The rubber powder is waste tire rubber powder, and its particle size is 80-120 meshes.

5. The method for preparing a low-temperature anti-shedding asphalt damping plate according to claim 1, characterized in that: The fiber material is glass fiber, and the length of the fiber is 3-5 mm.

6. The method for preparing a low-temperature anti-shedding asphalt damping plate according to claim 1, characterized in that: The inorganic filler is a mixture of mica powder and talc powder, wherein the mass ratio of the mica powder to the talc powder is 2:1, and the particle size is 200-300 meshes.

7. The method for preparing a low-temperature anti-shedding asphalt damping plate according to claim 1, characterized in that: The anti-stripping agent is an amine anti-stripping agent.

8. A method for preparing a low-temperature anti-shedding asphalt damping plate according to claims 1-7, characterized in that: The specific steps include: S1: premix the weighed rubber powder, fiber material, inorganic filler and anti-stripping agent in a high-speed mixer for 6-11 minutes at a mixing speed of 1000-1500 r / min to obtain a premix; S2: Heat the modified asphalt to 150-160°C to completely melt it; S3: adding tackifying resin to the melted asphalt and stirring evenly at a stirring speed of 400-500 r / min for 20-25 minutes to obtain mixed asphalt; S4: adding the premix to the mixed asphalt and continuing to stir at a stirring speed of 400-600 r / min for 25-35 minutes to obtain a damping plate mixture; S5: pouring the damping plate mixture into a mold while it is hot, and pressing it with a roller press at a pressing pressure of 5-10 MPa to obtain a damping plate blank; S6: The damping plate blank is naturally cooled to room temperature, and then a layer of anti-sticking agent is sprayed on its surface. The anti-sticking agent is a silicone oil anti-sticking agent, and the spraying amount is 0.1-0.2g / m 2 ; S7: Carry out quality inspection on the prepared asphalt damping panels. The inspection items include thickness, density, adhesion, damping performance, etc. Qualified products are packaged.