CN111534221A - Coating for preventing urban rail stray current corrosion and preparation method thereof - Google Patents
Coating for preventing urban rail stray current corrosion and preparation method thereof Download PDFInfo
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- CN111534221A CN111534221A CN202010487539.XA CN202010487539A CN111534221A CN 111534221 A CN111534221 A CN 111534221A CN 202010487539 A CN202010487539 A CN 202010487539A CN 111534221 A CN111534221 A CN 111534221A
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention discloses a coating for preventing urban track stray current corrosion and a preparation method thereof. The preparation method comprises the steps of preparing a basic rubber material, preparing the component A, preparing the component B and preparing the final coating by mixing the components, wherein the coating prepared by combining the components disclosed by the invention has excellent electrical insulation performance, mechanical performance, hydrophobicity and hydrophobic migration performance, weather aging resistance, no toxicity and no corrosion; the preparation method ensures that the coating has stronger adhesive force and durability and has good adhesive property on various metal and non-metal materials.
Description
Technical Field
The invention relates to the technical field of urban rail transit, in particular to a coating for preventing urban rail stray current corrosion and a preparation method thereof.
Background
The traction power supply system of urban rail transit engineering in China mainly adopts a traction power supply system of DC1500V (or DC750V) traction network current granting and running rail backflow. The substation supplies power to the train through a contact network or a conductor rail, and the contact network, the locomotive and the steel rail form a loop to enable traction current to flow back to the traction substation. Because the insulation resistance between the steel rail and the track bed structure or the tunnel is not infinite, when the traction current flows through the steel rail, the traction current cannot flow back to the negative electrode of the traction substation through the steel rail completely, a part of the traction current leaks to the track bed structure and the tunnel and flows into the ground, particularly at the supporting point of the steel rail fastener, the steel rail is insulated by the rubber base plate and the insulating gauge block in the fastener, but the traction current is easy to leak from the position in practical engineering, and the traction current leaked from the steel rail is stray current. Therefore, the following disadvantages exist in the prior art:
1. the insulating property of the steel rail at the joint of the fastener is poor, and the condition that stray current leaks and corrodes the peripheral buried metal pipeline, the communication cable sheath and the steel bar is easy to occur only by depending on the insulation of the rail lower backing plate and the gauge block.
2. Under the environment humid state, the air insulation value of a 70mm suspension space between the steel rail and the track bed surface can be reduced, and stray current leakage is easy to generate.
3. The surface of the fastener joint is easily polluted by oil stain, dust, scrap iron and other physical properties, and the leakage resistance of the fastener joint along the surface is far smaller than the insulation resistance of the fastener body, so that the insulation performance between the steel rail and the ground is invalid.
4. The fastener elastic strip is the minimum creepage distance between the fastener and the steel rail and is easily polluted by dust, scrap iron and other impurities, thereby causing the insulation failure between the steel rail and the fastener.
In view of the technical background, a plurality of designs taking the wrapped steel rail as a technical breakthrough appear in the market, but a plurality of wrapping materials are all made of single-type materials, so that the resistance performance, the strength performance, the pollution prevention performance, the pollution flashover prevention performance and the like cannot be considered, and the using effect is poor.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a coating for preventing urban rail stray current corrosion and a preparation method thereof, wherein the coating comprises two main materials and a plurality of auxiliary materials, the preparation method comprises the steps of preparing a basic rubber material, preparing a component A, preparing a component B and preparing the rubber to obtain the final coating, and the coating prepared by the method has excellent adhesive force and better insulating property.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the coating for preventing the stray current corrosion of the urban rails comprises main materials and auxiliary materials, wherein the main materials comprise hydroxyl-terminated polydimethylsiloxane and silicon resin, and the auxiliary materials comprise reinforcing fillers, cross-linking agents, catalysts, water repellents and tackifiers.
Preferably, the reinforcing filler is compounded by one or more of activated calcium carbonate, nano calcium carbonate, light calcium carbonate, heavy calcium carbonate, precipitated white carbon black and gas-phase white carbon black, the surface of which is not treated or is treated by stearic acid, silanes and titanate coupling agents;
the cross-linking agent is ketoxime silane or alkoxy silane containing more than two ketoxime silanes capable of being hydrolyzed by moisture; the catalyst is a platinum catalyst; the water repellent is an organic silicon polymer with reactive groups at two ends and a large number of hydrophobic functional groups on side chains;
the tackifier is prepared by mixing one or more of gamma-aminopropyltriethoxysilane, 3- (2, 3-epoxypropoxy) propyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, vinyl tributyrinoxime silane and 3-aminopropyltriethoxysilane.
Preferably, the hydroxyl-terminated polydimethylsiloxane, the silicone resin, the reinforcing filler, the cross-linking agent, the catalyst, the water repellent and the tackifier are mixed in a weight ratio of 100: 1-50: 5-30: 3-20: 0.01-2: 5-30: 0.2 to 30.
A preparation method of a coating for preventing urban rail stray current corrosion is characterized by comprising the following steps:
a. preparation of the base rubber
100 parts of hydroxyl-terminated polydimethylsiloxane, 1-50 parts of silicone resin, 5-30 parts of reinforcing filler, 5-30 parts of water repellent and 0.1-20 parts of tackifier are kneaded in a double-shaft kneader for 15-30min to be uniform, then ground on a three-roller machine for 3-5 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then transferred into a drying kettle to be heated and stirred, the material temperature is kept at 150 ℃ and the vacuum degree is not lower than-0.085 MPa, and the mixture is vacuumized and dried for 2-4h and then sealed to prepare a basic rubber material for later use;
b. preparation of A component
Transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, adding 0.01-2 parts of catalyst when the temperature of the material is naturally cooled to be below 30 ℃, and uniformly stirring under normal pressure to obtain a component A;
c. preparation of B component
Transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, adding 3-20 parts of cross-linking agent and 0.1-10 parts of tackifier when the temperature of the rubber material is naturally cooled to be below 30 ℃, and uniformly stirring under normal pressure to obtain a component B;
d. glue preparation
When in use, the component A and the component B are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
Preferably, biax kneading machine includes the box, dog-house and bin outlet have been seted up on the box, and the parallel first pivot and the second pivot of wearing to be equipped with in the box, be equipped with the zigzag blade in first pivot and the second pivot, all be equipped with whirl blade between first pivot and the epaxial zigzag blade of second pivot and the box inner wall, just whirl blade effect is towards zigzag blade, be equipped with drive arrangement in first pivot and the second pivot.
The invention has the beneficial effects that: the paint formed by combining a plurality of components disclosed by the invention has excellent electrical insulation performance, mechanical performance, hydrophobicity, strong hydrophobic migration, weather aging resistance, no toxicity and no corrosion; the preparation method ensures that the coating has stronger adhesive force and durability and has good adhesive property on various metal and non-metal materials.
Drawings
FIG. 1 is a view showing an internal structure of a biaxial kneader of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.
The coating for preventing the stray current corrosion of the urban rails comprises main materials and auxiliary materials, wherein the main materials comprise hydroxyl-terminated polydimethylsiloxane and silicone resin, the auxiliary materials comprise reinforcing fillers, cross-linking agents, catalysts, water repellents and tackifiers, and the main materials and the auxiliary materials are sequentially mixed according to the weight ratio of 100: 1-50: 5-30: 3-20: 0.01-2: 5-30: 0.1-20 weight ratio;
the reinforcing filler is compounded by one or more of activated calcium carbonate, nano calcium carbonate, light calcium carbonate, heavy calcium carbonate, precipitated white carbon black and gas-phase white carbon black, the surface of which is not treated or is treated by stearic acid, silanes and titanate coupling agents;
the cross-linking agent is ketoxime silane or alkoxy silane containing more than two ketoxime silanes capable of being hydrolyzed by moisture; the catalyst is a platinum catalyst; the water repellent is an organic silicon polymer with reactive groups at two ends and a large number of hydrophobic functional groups on side chains;
the tackifier is prepared by mixing one or more of gamma-aminopropyltriethoxysilane, 3- (2, 3-epoxypropoxy) propyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, 3-aminopropyltrimethoxysilane and N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane.
The raw materials are prepared by basic sizing material, the component A is prepared, the component B is prepared and uniformly mixed according to the ratio of the component A to the component B of 1:1 when in use, preferably, an insulating layer with uniform thickness and continuity is formed on the surfaces of the steel rail, the fastener and the composite insulating wrapping material in an airless spraying, airless spraying or brush coating mode, so that the insulating property of the fastener system is substantially improved, the minimum surface insulating distance between the conventional fastener and the steel rail is effectively increased, and the problem of stray current leakage is solved, and the specific preparation method of the coating is as follows:
example one
Preparation of a base rubber material:
100 parts of hydroxyl-terminated polydimethylsiloxane, 5 parts of silicone resin, 10 parts of reinforcing filler (fumed silica with untreated surface), 10 parts of water repellent (fluorine-containing organosilicon), 0.5 part of tackifier (gamma-aminopropyltriethoxysilane) are kneaded in a double-shaft kneader for 15min to be uniform, then ground on a three-roller kneader for 3 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then transferred into a drying kettle to be heated and stirred, the material temperature is kept at 100 ℃, the vacuum degree is kept at-0.085 MPa, and the mixture is vacuumized, dried for 2h and sealed to prepare a basic rubber material for later use.
Referring to fig. 1, the double-shaft kneader comprises a box 1, a feeding port (preferably arranged at the top of the box 1, not shown in the figure) and a discharging port 11 (preferably arranged at the bottom of the box 1) are arranged on the box 1, a first rotating shaft 12 and a second rotating shaft 13 are arranged in the box 1 in parallel, a driving device (comprising a driving motor 16 and an 8-shaped belt pulley 17) is arranged on the first rotating shaft 12 and the second rotating shaft 13, the first rotating shaft 12 and the second rotating shaft 13 are provided with zigzag blades 14, the zigzag blades 14 which are matched with each other and rotate generate strong shearing action to enable the base rubber to rapidly react so as to obtain uniform mixing, kneading and stirring, and swirl blades 15 are arranged between the zigzag blades 14 on the first rotating shaft 12 and the second rotating shaft 13 and the inner wall of the box 1, and whirl blade 15 effect is towards zigzag blade 14, because zigzag blade 14 is located first pivot 12 and second pivot 13 central point respectively and puts, when rotatory stirring, the material can assemble the part between zigzag blade 14 both sides and box 1 inner wall gradually, cause the material of this part can not the intensive mixing, and central material mixing transition for the material mixes the effect and hands over, mixing time is longer, consequently whirl blade 15's effect is that the material that collects the box 1 both sides is rotatory to be shed to box 1 center, improves the mixed effect of kneading the material.
Preparation of component A:
and (3) transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 0.5 part of platinum catalyst, and uniformly stirring under normal pressure to obtain the component A.
Preparation of the component B:
and (3) transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 4 parts of crosslinking agent (ketoxime silane) and 0.3 part of tackifier (3- (2, 3-epoxypropoxy) propyl trimethoxy silane), and uniformly stirring at normal pressure to obtain the component B.
Preparing glue:
when in use, the component A and the component B prepared by the method are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
Example two
Preparation of a base rubber material:
100 parts of hydroxyl-terminated polydimethylsiloxane, 5 parts of silicone resin, 10 parts of reinforcing filler (surface untreated activated calcium carbonate), 10 parts of water repellent (fluorine-containing organosilicon), and 0.5 part of tackifier (N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane) are kneaded in a double-shaft kneader for 15min to be uniform (the working principle is the same as that of the first embodiment), then ground on a three-roller machine for 3 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then transferred into a drying kettle to be heated and stirred, the material temperature is kept at 100 ℃, the vacuum degree is kept at-0.085 MPa, and the base rubber material is prepared for standby after being vacuumized and dried for 2h and sealed.
Preparation of component A:
and (3) transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 0.5 part of platinum catalyst, and uniformly stirring under normal pressure to obtain the component A.
Preparation of the component B:
and (3) transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 4 parts of cross-linking agent (alkoxy silane) and 0.3 part of tackifier (gamma-aminopropyl triethoxysilane), and uniformly stirring at normal pressure to obtain the component B.
Preparing glue:
when in use, the component A and the component B prepared by the method are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
EXAMPLE III
Preparation of a base rubber material:
100 parts of hydroxyl-terminated polydimethylsiloxane, 20 parts of silicone resin, 15 parts of reinforcing filler (light calcium carbonate with surface treated by stearic acid), 15 parts of water repellent (fluorine-containing organosilicon), and 5 parts of tackifier (gamma- (methacryloyloxy) propyl trimethoxy silane) are kneaded in a double-shaft kneader for 25min to be uniform (the working principle is the same as that in the first embodiment), then the mixture is ground on a three-roller kneader for 4 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then the mixture is transferred into a drying kettle to be heated and stirred, the material temperature is kept at 120 ℃, the vacuum degree is kept at-0.075 MPa, the mixture is vacuumized and dried for 3h, and then the mixture is sealed to prepare a basic rubber material for.
Preparation of component A:
and (3) transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 1 part of platinum catalyst, and uniformly stirring under normal pressure to obtain the component A.
Preparation of the component B:
and (3) transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 10 parts of crosslinking agent (ketoxime silane) and 3 parts of tackifier (3-aminopropyltrimethoxysilane), and uniformly stirring at normal pressure to obtain the component B.
Preparing glue:
when in use, the component A and the component B prepared by the method are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
Example four
Preparation of a base rubber material:
100 parts of hydroxyl-terminated polydimethylsiloxane, 20 parts of silicone resin, 15 parts of reinforcing filler (heavy calcium carbonate with the surface treated by stearic acid), 15 parts of water repellent (fluorine-containing organosilicon), and 5 parts of tackifier (gamma-aminopropyltriethoxysilane) are kneaded in a double-shaft kneader for 25min to be uniform (the working principle is the same as that of the first embodiment), then ground on a three-roller machine for 4 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then transferred into a drying kettle to be heated and stirred, the material temperature is kept at 120 ℃, the vacuum degree is kept at-0.075 MPa, and the mixture is vacuumized, dried for 3h and sealed to prepare a basic rubber material for later use.
Preparation of component A:
and (3) transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 1 part of platinum catalyst, and uniformly stirring under normal pressure to obtain the component A.
Preparation of the component B:
and (3) transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, adding 10 parts of cross-linking agent (alkoxy silane) and 3 parts of tackifier (3-aminopropyl trimethoxy silane) when the temperature of the rubber material is naturally cooled to be below 30 ℃, and uniformly stirring at normal pressure to obtain the component B.
Preparing glue:
when in use, the component A and the component B prepared by the method are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
EXAMPLE five
Preparation of a base rubber material:
100 parts of hydroxyl-terminated polydimethylsiloxane, 45 parts of silicone resin, 25 parts of reinforcing filler (10 parts of nano calcium carbonate with the surface treated by a titanate coupling agent and 15 parts of precipitated white carbon black), 25 parts of water repellent (fluorine-containing organosilicon), 10 parts of tackifier (5 parts of vinyl tributyrinoxime silane and 5 parts of N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane) are kneaded in a double-shaft kneader for 30min to be uniform (the working principle is the same as that in the first embodiment), then the mixture is ground on the three-roller kneader for 5 times, the ground semi-finished rubber material is put into the double-shaft kneader again for kneading, then the mixture is transferred into a drying kettle for heating and stirring, the material temperature is kept at 150 ℃, the vacuum degree is kept at-0.07 MPa, and the mixture is vacuumized and dried for 4 hours and then sealed to prepare the basic rubber material for standby.
Preparation of component A:
and (3) transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 1.5 parts of platinum catalyst, and uniformly stirring under normal pressure to obtain the component A.
Preparation of the component B:
and (3) transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 25 parts of crosslinking agent (ketoxime silane) and 5 parts of tackifier (gamma- (methacryloyloxy) propyl trimethoxy silane), and uniformly stirring at normal pressure to obtain the component B.
Preparing glue:
when in use, the component A and the component B prepared by the method are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
EXAMPLE six
Preparation of a base rubber material:
100 parts of hydroxyl-terminated polydimethylsiloxane, 45 parts of silicone resin, 25 parts of reinforcing filler (10 parts of nano calcium carbonate without surface treatment and 15 parts of precipitated white carbon black), 25 parts of water repellent (fluorine-containing organic silicon), 10 parts of tackifier (5 parts of gamma-aminopropyltriethoxysilane and 5 parts of 3-aminopropyltriethoxysilane) are kneaded in a double-shaft kneader for 30min to be uniform (the working principle is the same as that of the first embodiment), then the mixture is ground on a three-roller machine for 5 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then the mixture is transferred into a drying kettle to be heated and stirred, the material temperature is kept at 150 ℃, the vacuum degree is kept at-0.07 MPa, and the mixture is vacuumized and dried for 4h and then sealed to prepare the basic rubber material for later use.
Preparation of component A:
and (3) transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 1.5 parts of platinum catalyst, and uniformly stirring under normal pressure to obtain the component A.
Preparation of the component B:
and (3) transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, naturally cooling the rubber material to below 30 ℃, adding 25 parts of cross-linking agent (alkoxy silane) and 5 parts of tackifier (gamma- (methacryloyloxy) propyl trimethoxy silane), and uniformly stirring at normal pressure to obtain the component B.
Preparing glue:
when in use, the component A and the component B prepared by the method are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
The coatings prepared in the first to sixth embodiments form a thin, uniform and continuous insulating layer on the surfaces of the steel rail, the fastener and the composite insulating wrapping material in an airless spraying, airless spraying and brush coating mode, then PHM modified powder is sprayed on the insulating layer, and after drying and curing for 24 hours at room temperature, the insulating layer is obtained after curing for 7 days. When in use, the rubber self-curing rubber self. The cured coating has rubber elasticity, can be used for a long time at the temperature of-60-200 ℃, and has excellent electrical insulation performance, mechanical performance, hydrophobicity, strong hydrophobic migration, weather aging resistance, no toxicity and no corrosion. Has good adhesion to various metal and non-metal materials.
The results of the performance tests of the coatings prepared in examples one to six are shown in table one below:
the test results of the paint insulative coatings prepared in examples one through six are shown in table two below:
the insulating coatings of examples one to six were tested for adhesion, according to GB/T1720-1979 (1989) (paint adhesion test); the surface resistivity, volume resistivity, dielectric constant, dielectric loss factor and electrical strength of the insulating coating were measured by the test method referred to GB/T1692-.
From the results in table two, it can be seen that the final insulating coatings formed by the silicone rubber coatings of examples one to six have better adhesion and better insulating properties.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a prevent coating of city track stray current corruption, includes major ingredient and auxiliary material, its characterized in that: the main material comprises hydroxyl-terminated polydimethylsiloxane and silicone resin, and the auxiliary material comprises reinforcing filler, a cross-linking agent, a catalyst, a water repellent and a tackifier.
2. The coating for preventing urban rail stray current corrosion according to claim 1, wherein the coating comprises: the reinforcing filler is compounded by one or more of activated calcium carbonate, nano calcium carbonate, light calcium carbonate, heavy calcium carbonate, precipitated white carbon black and gas-phase white carbon black, the surface of which is not treated or is treated by stearic acid, silanes and titanate coupling agents;
the cross-linking agent is ketoxime silane or alkoxy silane containing more than two ketoxime silanes capable of being hydrolyzed by moisture; the catalyst is a platinum catalyst; the water repellent is an organic silicon polymer with reactive groups at two ends and a large number of hydrophobic functional groups on side chains;
the tackifier is prepared by mixing one or more of gamma-aminopropyltriethoxysilane, 3- (2, 3-epoxypropoxy) propyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane, gamma- (methacryloyloxy) propyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N-beta- (aminoethyl) -gamma-aminopropylmethyldimethoxysilane, vinyl tributyrinoxime silane and 3-aminopropyltriethoxysilane.
3. The coating for preventing urban rail stray current corrosion according to claim 2, wherein the coating comprises: the hydroxyl-terminated polydimethylsiloxane, the silicone resin, the reinforcing filler, the cross-linking agent, the catalyst, the water repellent and the tackifier are mixed in a weight ratio of 100: 1-50: 5-30: 3-20: 0.01-2: 5-30: 0.2 to 30.
4. The preparation method of the coating for preventing the urban rail stray current from corroding according to claim 3, which is characterized by comprising the following steps:
a. preparation of the base rubber
100 parts of hydroxyl-terminated polydimethylsiloxane, 1-50 parts of silicone resin, 5-30 parts of reinforcing filler, 5-30 parts of water repellent and 0.1-20 parts of tackifier are kneaded in a double-shaft kneader for 15-30min to be uniform, then ground on a three-roller machine for 3-5 times, the ground semi-finished rubber material is put into the double-shaft kneader again to be kneaded, then transferred into a drying kettle to be heated and stirred, the material temperature is kept at 150 ℃ and the vacuum degree is not lower than-0.085 MPa, and the mixture is vacuumized and dried for 2-4h and then sealed to prepare a basic rubber material for later use;
b. preparation of A component
Transferring 1/2 parts of dried basic rubber material to a rubber preparation kettle, filling nitrogen, adding 0.01-2 parts of catalyst when the temperature of the material is naturally cooled to be below 30 ℃, and uniformly stirring under normal pressure to obtain a component A;
c. preparation of B component
Transferring the rest 1/2 dried basic rubber material to a rubber preparation kettle, filling nitrogen, adding 3-20 parts of cross-linking agent and 0.1-10 parts of tackifier when the temperature of the rubber material is naturally cooled to be below 30 ℃, and uniformly stirring under normal pressure to obtain a component B;
d. glue preparation
When in use, the component A and the component B are mixed according to the ratio of 1:1, uniformly mixing to obtain the coating.
5. The preparation method of the coating for preventing the urban rail stray current from corroding according to claim 4, wherein the preparation method comprises the following steps: biax kneader includes box (1), dog-house and bin outlet (11) have been seted up on box (1), and first pivot (12) and second pivot (13) are worn to be equipped with in box (1) the parallel, be equipped with zigzag blade (14) on first pivot (12) and second pivot (13), all be equipped with whirl blade (15) between zigzag blade (14) on first pivot (12) and second pivot (13) and box (1) inner wall, just whirl blade (15) are used towards zigzag blade (14), be equipped with drive arrangement on first pivot (12) and second pivot (13).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113201269A (en) * | 2021-04-13 | 2021-08-03 | 中铁第四勘察设计院集团有限公司 | Antifouling and anticorrosive profile steel cantilever positioning device of contact network and processing method |
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| CN104789123A (en) * | 2015-04-30 | 2015-07-22 | 国网四川省电力公司电力科学研究院 | One-component anti-pollution flashover coating for inhibiting chlorococcum growth and preparation method thereof |
| CN109233620A (en) * | 2018-08-09 | 2019-01-18 | 成都拓利科技股份有限公司 | A kind of RTV anti-pollution flashover coating of organic solvent-free and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104789123A (en) * | 2015-04-30 | 2015-07-22 | 国网四川省电力公司电力科学研究院 | One-component anti-pollution flashover coating for inhibiting chlorococcum growth and preparation method thereof |
| CN109233620A (en) * | 2018-08-09 | 2019-01-18 | 成都拓利科技股份有限公司 | A kind of RTV anti-pollution flashover coating of organic solvent-free and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113201269A (en) * | 2021-04-13 | 2021-08-03 | 中铁第四勘察设计院集团有限公司 | Antifouling and anticorrosive profile steel cantilever positioning device of contact network and processing method |
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Application publication date: 20200814 |