CN112625396A - Damping film suitable for welding process and preparation method thereof - Google Patents
Damping film suitable for welding process and preparation method thereof Download PDFInfo
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- CN112625396A CN112625396A CN202011456759.2A CN202011456759A CN112625396A CN 112625396 A CN112625396 A CN 112625396A CN 202011456759 A CN202011456759 A CN 202011456759A CN 112625396 A CN112625396 A CN 112625396A
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Abstract
The invention provides a damping film suitable for a welding procedure, which is prepared from the following raw materials: 4-10 parts of butyl rubber; 2-6 parts of SBS rubber; 5-15 parts of tackifying resin; 10-20 parts of tackifying liquid; 5-10 parts by weight of a softener; 1-3 parts by weight of a reinforcing agent; 50 to 75 parts by weight of a filler; 0.1 to 2 weight portions of anti-aging agent. Compared with the prior art, the damping film suitable for the welding procedure provided by the invention adopts specific content components, realizes better overall interaction, has good self-adhesion, oil resistance, high-temperature baking resistance, flushing resistance and steel plate corrosion resistance, is light, has good vibration absorption and noise reduction effects, and is suitable for the automobile welding procedure.
Description
Technical Field
The invention relates to the technical field of engineering materials for shock absorption and noise reduction, in particular to a damping film suitable for a welding procedure and a preparation method thereof.
Background
As a vehicle for daily travel, people pay more and more attention to comfort of the automobile when buying the automobile and influence buying intention of the people, so that discomfort caused by noise and vibration of the automobile is also greatly valued by a host factory in automobile production. To improve noise and vibration, a damping film using a polymer viscoelastic material is widely used due to its environmental protection and high damping effect.
At present, a plurality of domestic patents have already studied certain amount of damping films, such as the multifunctional damping film for automobiles disclosed in patent CN106085294A, wherein the film has damping performance at normal temperature and high temperature; however, 3 different glue layers are needed to form, layered preparation is needed, and the process is relatively complex; as disclosed in patent CN103065272A, the damping adhesive is a flowable material at room temperature, and is troublesome to use, and the heat resistance of the damping adhesive cannot exceed 250 ℃, and cannot be processed at high temperature; for another example, patent CN106957624A discloses a high temperature resistant high performance damping adhesive and a preparation method thereof, the product needs to be placed between plates and pressed at high temperature when in use, and the use method is not combined with the actual production process of automobiles, and is not beneficial to the use in host factories.
Disclosure of Invention
In view of the above, the present invention aims to provide a damping film suitable for a welding process and a preparation method thereof, and the damping film suitable for the welding process provided by the present invention has good self-adhesion, oil resistance, high temperature baking resistance, flushing resistance and steel plate corrosion resistance, and is light in weight, good in vibration absorption and noise reduction effects, and suitable for an automobile welding process.
The invention provides a damping film suitable for a welding procedure, which is prepared from the following raw materials:
4-10 parts of butyl rubber;
2-6 parts of SBS rubber;
5-15 parts of tackifying resin;
10-20 parts of tackifying liquid;
5-10 parts by weight of a softener;
1-3 parts by weight of a reinforcing agent;
50 to 75 parts by weight of a filler;
0.1 to 2 weight portions of anti-aging agent.
Preferably, the butyl-like rubber is selected from one or more of butyl rubber, chlorinated butyl rubber, brominated butyl rubber and butyl reclaimed rubber.
Preferably, the tackifying resin is selected from one or more of hydrocarbon resin, tackifying resin SL-1807, rosin resin, terpene resin, phenolic resin, coumarone resin, dicyclopentadiene series petroleum resin and styrene resin.
Preferably, the tackifying liquid is selected from one or more of liquid terpene resins, liquid rosin resins, polyisobutylene, liquid C9 resins, and liquid coumarone resins.
Preferably, the softening agent is selected from one or more of naphthenic oil, DINP, a coupling agent KH560, paraffin oil and pine tar.
Preferably, the reinforcing agent is selected from carbon black and/or sepiolite.
Preferably, the filler is one or more selected from talc powder, mica powder, argil, heavy calcium carbonate, light calcium carbonate, diatomite, titanium dioxide, barium sulfate and white carbon black.
The invention also provides a preparation method of the damping film suitable for the welding process, which comprises the following steps:
and (2) after the butyl rubber is milled, the butyl rubber is kneaded with SBS rubber, tackifying resin, reinforcing agent, the first part of filler, anti-aging agent, the first part of tackifying liquid and softener for the first time, then the rest part of filler is added for the second kneading, finally the rest part of tackifying liquid is added for the third kneading, and the damping rubber sheet suitable for the welding process is obtained after discharging.
Preferably, the mass ratio of the first part of tackifying liquid to the rest part of tackifying liquid is 1: (2-5).
Preferably, the temperature of the first kneading is 105-125 ℃, and the time is 20-40 min;
the temperature of the second kneading is 140-145 ℃, and the time is 20-40 min;
the temperature of the third kneading is the same as that of the second kneading, the rest part of tackifying liquid is added in batches, and the kneading time of each batch is 5-15 min.
The invention provides a damping film suitable for a welding procedure, which is prepared from the following raw materials: 4-10 parts of butyl rubber; 2-6 parts of SBS rubber; 5-15 parts of tackifying resin; 10-20 parts of tackifying liquid; 5-10 parts by weight of a softener; 1-3 parts by weight of a reinforcing agent; 50 to 75 parts by weight of a filler; 0.1 to 2 weight portions of anti-aging agent. Compared with the prior art, the damping film suitable for the welding procedure provided by the invention adopts specific content components, realizes better overall interaction, has good self-adhesion, oil resistance, high-temperature baking resistance, flushing resistance and steel plate corrosion resistance, is light, has good vibration absorption and noise reduction effects, and is suitable for the automobile welding procedure.
In addition, the preparation method provided by the invention is simple in process, easy in condition control and suitable for large-scale production and application.
Drawings
FIG. 1 is a schematic view of a rolling ball initial tack test of the present invention;
FIG. 2 is a schematic view of the tack test of the present invention;
FIG. 3 is a schematic view of the bond strength test of the present invention;
FIG. 4 is a schematic view of the high temperature resistance test of the present invention;
FIG. 5 is a schematic diagram of the bake resistance test of the present invention;
FIG. 6 is a schematic view of the wash-off resistance test of the present invention;
FIG. 7 is a schematic diagram of a steel sheet corrosion resistance test according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a damping film suitable for a welding procedure, which is prepared from the following raw materials:
4-10 parts of butyl rubber;
2-6 parts of SBS rubber;
5-15 parts of tackifying resin;
10-20 parts of tackifying liquid;
5-10 parts by weight of a softener;
1-3 parts by weight of a reinforcing agent;
50 to 75 parts by weight of a filler;
0.1 to 2 weight portions of anti-aging agent.
In the invention, the damping film suitable for the welding process comprises butyl rubber, SBS rubber, tackifying resin, tackifying liquid, softening agent, reinforcing agent, filler and anti-aging agent, and preferably comprises butyl rubber, SBS rubber, tackifying resin, tackifying liquid, softening agent, reinforcing agent, filler and anti-aging agent.
In the present invention, the butyl-like rubber means a copolymer containing a major amount of isobutylene and a minor amount of isoprene; the butyl-like rubber is preferably selected from one or more of butyl rubber, chlorinated butyl rubber, brominated butyl rubber and butyl reclaimed rubber, and more preferably butyl rubber, chlorinated butyl rubber or brominated butyl rubber. The source of the butyl rubber is not particularly limited in the present invention, and commercially available products of the above-mentioned butyl rubber, chlorinated butyl rubber, brominated butyl rubber and butyl reclaimed rubber known to those skilled in the art may be used. In the present invention, the damping rubber sheet suitable for the welding process comprises 4 to 10 parts by weight of butyl rubber, preferably 4 to 9 parts by weight.
In the present invention, SBS rubber means styrene-butadiene-styrene block copolymer; the present invention is not particularly limited in its origin, and commercially available products known to those skilled in the art may be used. In the present invention, the commercially available model of the SBS rubber is preferably selected from one or more of SBS1301, SBS1401, SBS1201, SBS791, LG501, and KTR101, and more preferably KTR101, SBS1301, SBS1201, or LG 501. In the invention, the damping rubber sheet suitable for the welding process comprises 2 to 6 parts by weight of SBS rubber, preferably 3 to 6 parts by weight.
In the present invention, the tackifier resin is preferably one or more selected from the group consisting of hydrocarbon resin, tackifier resin SL-1807, rosin resin, terpene resin, phenol resin, coumarone resin, dicyclopentadiene-based petroleum resin, and styrene resin, and more preferably hydrocarbon resin (such as carbon five resin or carbon nine resin), tackifier resin SL-1807, or phenol resin. The source of the tackifier resin in the present invention is not particularly limited, and commercially available products of the above hydrocarbon resin, tackifier resin SL-1807, rosin resin, terpene resin, phenol resin, coumarone resin, dicyclopentadiene petroleum resin and styrene resin, which are well known to those skilled in the art, may be used. In the present invention, the damping rubber sheet suitable for the welding process includes 5 to 15 parts by weight of a tackifying resin, preferably 6 to 15 parts by weight.
In the present invention, the tackifying liquid is preferably selected from one or more of liquid terpene resins, liquid rosin resins, polyisobutylene, liquid C9 resins, and liquid coumarone resins, and more preferably polyisobutylene or liquid C9 resins. The source of the tackifying liquid in the present invention is not particularly limited, and commercially available products of the above-mentioned liquid terpene resin, liquid rosin resin, polyisobutylene, liquid C9 resin and liquid coumarone resin, which are well known to those skilled in the art, may be used. In the invention, the damping rubber sheet suitable for the welding process comprises 10 to 20 parts by weight of thickening liquid.
In the present invention, the softening agent is preferably selected from one or more of naphthenic oil, DINP, a coupling agent KH560, paraffin oil and pine tar, and more preferably naphthenic oil, DINP or a coupling agent KH 560. The present invention is not particularly limited in the source of the softener, and commercially available products of the above naphthenic oil, DINP, coupling agent KH560, paraffin oil and pine tar, which are well known to those skilled in the art, may be used. In the invention, the damping rubber sheet suitable for the welding process comprises 5 to 10 parts by weight of softener, preferably 5 to 9 parts by weight.
In the present invention, the reinforcing agent is preferably selected from carbon black and/or sepiolite, and more preferably carbon black or sepiolite. The source of the reinforcing agent in the present invention is not particularly limited, and commercially available products of the above-mentioned carbon black and sepiolite, which are well known to those skilled in the art, may be used. In the invention, the damping rubber sheet suitable for the welding process comprises 1-3 parts by weight of reinforcing agent.
In the present invention, the filler is preferably selected from one or more of talc powder, mica powder, china clay, heavy calcium carbonate, light calcium carbonate, diatomaceous earth, titanium dioxide, barium sulfate and white carbon black, and more preferably from one or more of talc powder, mica powder, heavy calcium carbonate, light calcium carbonate, diatomaceous earth, barium sulfate and white carbon black. The source of the filler is not particularly limited in the present invention, and commercially available products of the above talc, mica powder, kaolin, ground calcium carbonate, light calcium carbonate, diatomaceous earth, titanium dioxide, barium sulfate and white carbon, which are well known to those skilled in the art, may be used. In the present invention, the damping rubber sheet suitable for the welding process includes 50 to 75 parts by weight of a filler, preferably 53 to 58 parts by weight of a filler.
The source of the antioxidant in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. In the present invention, the commercially available model number of the antioxidant is preferably one or more selected from RD, PPD, 246, 4010 and SP, more preferably RD or 246. In the invention, the damping rubber sheet suitable for the welding process comprises 0.1 to 2 parts by weight of the anti-aging agent, preferably 0.5 to 2 parts by weight.
The damping film suitable for the welding procedure provided by the invention adopts specific content components, realizes better overall interaction, has good self-adhesion, oil resistance, high-temperature baking resistance, flushing resistance and steel plate corrosion resistance, is light, has good vibration absorption and noise reduction effects, and is suitable for the automobile welding procedure.
The invention also provides a preparation method of the damping film suitable for the welding process, which comprises the following steps:
and (2) after the butyl rubber is milled, the butyl rubber is kneaded with SBS rubber, tackifying resin, reinforcing agent, the first part of filler, anti-aging agent, the first part of tackifying liquid and softener for the first time, then the rest part of filler is added for the second kneading, finally the rest part of tackifying liquid is added for the third kneading, and the damping rubber sheet suitable for the welding process is obtained after discharging.
In the present invention, the butyl rubber, SBS rubber, tackifying resin, reinforcing agent, filler, anti-aging agent, tackifying liquid, and softening agent are the same as those in the above technical solution, and are not described herein again.
In the invention, the open mill process preferably comprises the following specific steps:
adjusting the roller spacing of the open mill to 2mm, and putting the butyl rubber into the open mill for 2 min; and adjusting the roller spacing to 0mm, open-milling the rubber after the coarse milling for 5-10 min again, and then blanking for later use.
In the present invention, the composition of the filler in the first part may be the same as or different from the composition of the filler in the remaining part; the present invention is not particularly limited in this regard. In the present invention, the mass ratio of the filler in the first part to the filler in the remaining part is preferably (22 to 26.5): (28-48.5), more preferably (22-26.5): (29-36).
In the present invention, the composition of the first part of the thickening liquid is preferably the same as the composition of the remaining part of the thickening liquid. In the present invention, the mass ratio of the first part of the thickening liquid to the remaining part of the thickening liquid is preferably 1: (2-5), more preferably 1: (2.75-4).
In the present invention, the temperature of the first kneading is preferably 105 to 125 ℃; the time for the first kneading is preferably 20 to 40min, more preferably 30 min.
In the present invention, the temperature of the second kneading is preferably 140 to 145 ℃; the time for the second kneading is preferably 20 to 40min, more preferably 30 min.
In the present invention, the temperature of the third kneading is preferably the same as that of the above second kneading; the third kneading is preferably carried out by adding the remaining part of the thickening liquid in a batch manner, and the kneading time per batch is preferably 5 to 15min, more preferably 10 min. The number of times of the divided batches is not particularly limited in the present invention, and may be three to four times as is well known to those skilled in the art.
The preparation method provided by the invention is simple in process, easy in condition control and suitable for large-scale production and application.
The invention provides a damping film which has self-adhesion and oil resistance, can be used for an automobile welding procedure, and has the advantages of baking resistance, washing resistance of a pretreatment liquid electrophoretic solution and corrosion resistance of a steel plate; the damping film has the following beneficial effects:
the damping film has high self-adhesion, can be directly paved on a vehicle body metal plate coated with anti-rust oil, and is beneficial to improving the production efficiency of an automobile; after the damping film is laid and attached, the good viscosity and damping effect can be still kept for the washing and high-temperature baking of the pretreatment liquid and the electrophoretic liquid in the subsequent coating process, and the phenomena of displacement, flowing, stripping, deformation and the like can not occur; after the damping rubber sheet is paved, the phenomena of rusting, corrosion and the like of a covered vehicle body metal plate can be avoided, and the damping rubber sheet has good steel plate corrosion resistance; the damping film has the characteristic of keeping good damping performance at normal temperature and high temperature; therefore, the damping film provided by the invention is suitable for an automobile welding process.
The invention provides a damping film suitable for a welding procedure, which is prepared from the following raw materials: 4-10 parts of butyl rubber; 2-6 parts of SBS rubber; 5-15 parts of tackifying resin; 10-20 parts of tackifying liquid; 5-10 parts by weight of a softener; 1-3 parts by weight of a reinforcing agent; 50 to 75 parts by weight of a filler; 0.1 to 2 weight portions of anti-aging agent. Compared with the prior art, the damping film suitable for the welding procedure provided by the invention adopts specific content components, realizes better overall interaction, has good self-adhesion, oil resistance, high-temperature baking resistance, flushing resistance and steel plate corrosion resistance, is light, has good vibration absorption and noise reduction effects, and is suitable for the automobile welding procedure.
In addition, the preparation method provided by the invention is simple in process, easy in condition control and suitable for large-scale production and application.
To further illustrate the present invention, the following examples are provided for illustration. The starting materials used in the following examples of the present invention are all commercially available.
Example 1
(1) Adjusting the roll spacing of the open mill to 2mm, and putting the chlorinated butyl rubber into the open mill for 2 min; and adjusting the roller spacing to 0mm, open-milling the rubber after the rough milling for 10min again, and then blanking for later use.
(2) Putting 5 parts by weight of the chlorinated butyl rubber obtained in the step (1), 4 parts by weight of KTR101, 15 parts by weight of carbon penta-resin, 1 part by weight of carbon black, 14 parts by weight of mica powder, 12.5 parts by weight of barium sulfate, 0.5 part by weight of anti-aging agent RD, 3 parts by weight of polyisobutylene and 9 parts by weight of KH560 into a kneader, starting the kneader, controlling the temperature of the kneader at 110-115 ℃ and kneading for 30 min; shutdown to feed a second batch: 12 parts of heavy calcium carbonate, 15 parts of barium sulfate and 2 parts of white carbon black, wherein the temperature of the kneader is controlled to be 140-145 ℃, and the kneading time is 30 min; stopping the machine, putting 10 parts by weight of polyisobutylene into the kneading machine in three batches, and discharging after kneading time of each batch is 10min to obtain the damping film suitable for the welding procedure.
Example 2
(1) Adjusting the roll spacing of the open mill to 2mm, and putting the butyl rubber into the open mill for 2 min; and adjusting the roller spacing to 0mm, open-milling the rubber after the coarse milling for 5min again, and then blanking for later use.
(2) Putting 9 parts by weight of the butyl rubber obtained in the step (1), 3 parts by weight of SBS1301, 6 parts by weight of carbon nine resin, 3 parts by weight of carbon black, 13 parts by weight of talcum powder, 10 parts by weight of barium sulfate, 2 parts by weight of anti-aging agent RD, 4 parts by weight of liquid C9 resin and 6 parts by weight of DINP into a kneader, starting the kneader, controlling the temperature of the kneader to be 120-125 ℃, and kneading for 30 min; shutdown to feed a second batch: 16 parts of light calcium carbonate, 12 parts of heavy calcium carbonate and 5 parts of white carbon black by weight, controlling the temperature of the kneader to be 140-145 ℃, and kneading for 30 min; stopping the machine, putting 11 parts by weight of liquid C9 resin into a kneader in four batches, kneading for 10min in each batch, and discharging to obtain the damping film suitable for the welding process.
Example 3
(1) Adjusting the roll spacing of the open mill to 2mm, and putting the brominated butyl rubber into the open mill for 2 min; and adjusting the roller spacing to 0mm, open-milling the rubber after the rough milling for 10min again, and then blanking for later use.
(2) Putting 4 parts by weight of the brominated butyl rubber obtained in the step (1), 6 parts by weight of SBS1201, 11 parts by weight of tackifying resin SL-1807, 2 parts by weight of sepiolite, 12 parts by weight of diatomite, 10 parts by weight of light calcium carbonate, 1 part by weight of anti-aging agent 246, 2 parts by weight of polyisobutylene and 8 parts by weight of naphthenic oil into a kneader, starting the kneader, controlling the temperature of the kneader to be 105-110 ℃, and kneading for 30 min; shutdown to feed a second batch: 15 parts of heavy calcium carbonate, 16 parts of barium sulfate and 5 parts of white carbon black, controlling the temperature of the kneader to be 140-145 ℃, and kneading for 30 min; and stopping the machine, putting 8 parts by weight of polyisobutylene into the kneading machine in three batches, and discharging after kneading for 10min in each batch to obtain the damping film suitable for the welding process.
Example 4
(1) Adjusting the roll spacing of the open mill to 2mm, and putting the butyl rubber into the open mill for 2 min; and adjusting the roller spacing to 0mm, open-milling the rubber after the rough milling for 10min again, and then blanking for later use.
(2) Putting 6 parts by weight of the butyl rubber obtained in the step (1), 5 parts by weight of LG501, 8 parts by weight of phenolic resin, 1.5 parts by weight of sepiolite, 12 parts by weight of mica powder, 11 parts by weight of barium sulfate, 1.5 parts by weight of antioxidant RD, 6 parts by weight of polyisobutylene and 5 parts by weight of DINP into a kneader, starting the kneader, controlling the temperature of the kneader to be 120-125 ℃, and kneading for 30 min; shutdown to feed a second batch: 14 parts of heavy calcium carbonate, 12 parts of barium sulfate and 4 parts of white carbon black, controlling the temperature of the kneader to be 140-145 ℃, and kneading for 30 min; stopping the machine, putting 14 parts by weight of polyisobutylene into the kneading machine in four batches, and discharging after the kneading time of each batch is 10min to obtain the damping film suitable for the welding procedure.
The method for detecting various performances of the damping film suitable for the welding process provided by the embodiments 1-4 of the invention specifically comprises the following steps:
(1) and testing the density of the product by adopting a drainage method.
(2) Testing the initial viscosity by a rolling ball initial viscosity tester; the initial viscosity test method of the rolling ball is shown in figure 1, and figure 1 is a schematic diagram of the initial viscosity test of the rolling ball initial viscosity tester.
(3) The oil resistance is measured by adopting the permanent viscosity and the bonding strength, and the bonding strength is tested by adopting a universal tensile testing machine according to Q/JLY J711431A-2019;
viscosity retention: the sampling sample is pasted on a stainless steel pipe with the diameter of 12.7mm, and is respectively placed horizontally and vertically for 24 hours, and then whether the pasting is firm or not has the bad phenomena of warping, opening, displacement, sagging and the like; the test method is shown in FIG. 2;
in the bonding strength, the normal test condition is 23 ℃ multiplied by 1h, the high temperature test condition is 90 ℃ multiplied by 30min, the low temperature test condition is-25 ℃ multiplied by 24h, the humidity test condition is 40 ℃ multiplied by 100% RH multiplied by 8h, and then the bonding strength is placed at 20 ℃ multiplied by 100% RH multiplied by 16 h; the test method is shown in FIG. 3.
(4) The high-temperature baking resistance is carried out according to the high-temperature resistance in the standard Q/JLY J711431A-2019;
high temperature resistance: placing the cold-rolled steel plate adhered with the damping fin at equal angles of vertical, 45 degrees (included angle with the horizontal plane), horizontal and the like, placing the damping fin with the surface facing downwards in a high-temperature box at 100 ℃ for 24 hours, taking out, cooling to room temperature and observing; the test method is shown in FIG. 4;
baking resistance: placing the cold-rolled steel plate adhered with the damping fin at equal angles of vertical, 45 degrees (included angle with the horizontal plane), horizontal and the like, placing the damping fin with the surface facing downwards in a high-temperature box at 200 ℃ for 30min, taking out, cooling to room temperature and observing; the test method is shown in FIG. 5.
(5) Wash resistance was tested against the wash resistance of SOR-LPS 01-BO-036;
washing resistance: vertically placing the cold-rolled steel plate adhered with the damping sheet under a 65-degree V fan-shaped nozzle, wherein the inner diameter of a water pipe is 10mm, the water pressure display value is 0.7Bar, and the water spraying flow rate is 20L/min; the test method is shown in FIG. 6.
(6) The steel plate corrosion resistance is tested according to Q/JLY J711431A-2019;
steel plate corrosion resistance: placing the cold-rolled steel plate attached with the damping fins in a salt spray test box, carrying out 1006h neutral salt spray according to Q/JLYJ711431A-2019, peeling the damping fins from the steel plate, and observing the state of the steel plate; the test method is shown in FIG. 7.
(7) The loss factor is tested by adopting a magnetic excitation sensor according to GB/T16406-;
the detection results are shown in tables 1 to 6.
Table 1 product density and initial tack data
| Examples | Density (g/cm)3) | Initial tack (cm) |
| 1 | 1.58 | 1.0 |
| 2 | 1.56 | 0.5 |
| 3 | 1.55 | 0.8 |
| 4 | 1.57 | 0.7 |
TABLE 2 oil resistance data of the products
TABLE 3 high temperature bakeability data for the product
TABLE 4 product washout resistance data
| Examples | Resistance to washing |
| 1 | No peeling and falling off, and the displacement is less than or equal to 2mm |
| 2 | No peeling and falling off, and the displacement is less than or equal to 2mm |
| 3 | No peeling and falling off, and the displacement is less than or equal to 2mm |
| 4 | No peeling and falling off, and the displacement is less than or equal to 2mm |
TABLE 5 Steel plate Corrosion resistance data of the products
| Examples | Corrosion resistance of steel plate |
| 1 | No corrosion phenomenon |
| 2 | No corrosion phenomenon |
| 3 | No corrosion phenomenon |
| 4 | No corrosion phenomenon |
TABLE 6 product loss factor data
The experimental result shows that the damping film suitable for the welding procedure provided by the invention combines the characteristics of the automobile production process, and has the following beneficial effects: the damping film has high self-adhesion, can be directly paved on a vehicle body metal plate coated with anti-rust oil, and is beneficial to improving the production efficiency of an automobile; after the damping film is laid and attached, the good viscosity and damping effect can be still kept for the washing and high-temperature baking of the pretreatment liquid and the electrophoretic liquid in the subsequent coating process, and the phenomena of displacement, flowing, stripping, deformation and the like can not occur; after the damping rubber sheet is paved, the phenomena of rusting, corrosion and the like of a covered vehicle body metal plate can be avoided, and the damping rubber sheet has good steel plate corrosion resistance; the damping film has the characteristic of keeping good damping performance at normal temperature and high temperature; therefore, the damping film provided by the invention is suitable for an automobile welding process.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A damping film suitable for a welding procedure is prepared from the following raw materials:
4-10 parts of butyl rubber;
2-6 parts of SBS rubber;
5-15 parts of tackifying resin;
10-20 parts of tackifying liquid;
5-10 parts by weight of a softener;
1-3 parts by weight of a reinforcing agent;
50 to 75 parts by weight of a filler;
0.1 to 2 weight portions of anti-aging agent.
2. The damping film suitable for the welding procedure according to claim 1, wherein the butyl rubber is selected from one or more of butyl rubber, chlorinated butyl rubber, brominated butyl rubber and butyl reclaimed rubber.
3. The damping film suitable for use in a welding process according to claim 1, wherein the tackifying resin is selected from one or more of hydrocarbon resins, tackifying resins SL-1807, rosin resins, terpene resins, phenolic resins, coumarone resins, dicyclopentadiene petroleum resins, and styrene resins.
4. The damping film suitable for use in a welding process of claim 1, wherein said tackifying liquid is selected from one or more of liquid terpene resins, liquid rosin resins, polyisobutylene, liquid C9 resins, and liquid coumarone resins.
5. The damping film suitable for use in a welding process of claim 1, wherein the softening agent is selected from one or more of naphthenic oil, DINP, a coupling agent KH560, paraffin oil and pine tar.
6. The damping film suitable for use in a welding process of claim 1, wherein the reinforcing agent is selected from carbon black and/or sepiolite.
7. The damping film suitable for the welding procedure according to claim 1, wherein the filler is one or more selected from talc, mica powder, pottery clay, heavy calcium carbonate, light calcium carbonate, diatomaceous earth, titanium dioxide, barium sulfate and white carbon black.
8. A method for preparing a damping film suitable for a welding process according to any one of claims 1 to 7, comprising the following steps:
and (2) after the butyl rubber is milled, the butyl rubber is kneaded with SBS rubber, tackifying resin, reinforcing agent, the first part of filler, anti-aging agent, the first part of tackifying liquid and softener for the first time, then the rest part of filler is added for the second kneading, finally the rest part of tackifying liquid is added for the third kneading, and the damping rubber sheet suitable for the welding process is obtained after discharging.
9. The method of claim 8, wherein the mass ratio of the first portion of viscosified liquid to the remaining portion of viscosified liquid is 1: (2-5).
10. The production method according to claim 8, wherein the temperature of the first kneading is 105 to 125 ℃ for 20 to 40 min;
the temperature of the second kneading is 140-145 ℃, and the time is 20-40 min;
the temperature of the third kneading is the same as that of the second kneading, the rest part of tackifying liquid is added in batches, and the kneading time of each batch is 5-15 min.
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|---|---|---|---|---|
| JP2010024275A (en) * | 2008-07-16 | 2010-02-04 | Aron Kasei Co Ltd | Heat-resistant damping elastomer composition |
| CN102993754A (en) * | 2012-12-12 | 2013-03-27 | 湖北蓝盾之星科技股份有限公司 | Self-adhesive waterproof material and preparation method thereof |
| CN108531101A (en) * | 2018-04-18 | 2018-09-14 | 杭州之江有机硅化工有限公司 | A kind of self-adhering-type butyl damping fin and preparation method thereof |
| CN111138772A (en) * | 2020-01-17 | 2020-05-12 | 山东道恩高分子材料股份有限公司 | High-damping slow-recovery thermoplastic elastomer and preparation method thereof |
| CN111925624A (en) * | 2020-08-11 | 2020-11-13 | 株洲时代新材料科技股份有限公司 | High-low temperature resistant soft sound insulation material and preparation method thereof |
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2020
- 2020-12-10 CN CN202011456759.2A patent/CN112625396B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010024275A (en) * | 2008-07-16 | 2010-02-04 | Aron Kasei Co Ltd | Heat-resistant damping elastomer composition |
| CN102993754A (en) * | 2012-12-12 | 2013-03-27 | 湖北蓝盾之星科技股份有限公司 | Self-adhesive waterproof material and preparation method thereof |
| CN108531101A (en) * | 2018-04-18 | 2018-09-14 | 杭州之江有机硅化工有限公司 | A kind of self-adhering-type butyl damping fin and preparation method thereof |
| CN111138772A (en) * | 2020-01-17 | 2020-05-12 | 山东道恩高分子材料股份有限公司 | High-damping slow-recovery thermoplastic elastomer and preparation method thereof |
| CN111925624A (en) * | 2020-08-11 | 2020-11-13 | 株洲时代新材料科技股份有限公司 | High-low temperature resistant soft sound insulation material and preparation method thereof |
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