CN117025074B - Stray current resistant water-based paint for rail transit and preparation method thereof - Google Patents
Stray current resistant water-based paint for rail transit and preparation method thereof Download PDFInfo
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- CN117025074B CN117025074B CN202311162079.3A CN202311162079A CN117025074B CN 117025074 B CN117025074 B CN 117025074B CN 202311162079 A CN202311162079 A CN 202311162079A CN 117025074 B CN117025074 B CN 117025074B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a stray current resistant water-based paint for rail transit and a preparation method thereof; the water paint is used for covering the contact object between the steel rail and the concrete sleeper, and the coverage area relates to the steel rail, the screw, the concrete, the rubber and the sleeper; the coating is a two-component coating, which comprises the following components in parts by weight (70-80): the component A and the component B of (20-30) are composed, and the component B is a curing agent; wherein: the component A comprises the following components in parts by weight: 40-60 parts of aqueous polyurethane dispersoid, 10-25 parts of urea-formaldehyde resin, 2-3 parts of dispersing agent, 20-40 parts of titanium dioxide, 1-2.5 parts of thickening agent, 0.5-1 part of flatting agent and 10-20 parts of water. The coating provided by the invention has excellent insulativity, adhesion, weather resistance and aging resistance.
Description
Technical Field
The invention relates to the technical field of rail transit coatings, in particular to an anti-stray current water-based coating for rail transit and a preparation method thereof.
Background
Most urban rail transit adopts DC1500V (or DC 750V) overhead line system current supply and traction power supply of running rail reflux. Since the rail is not completely insulated from the ground, current may leak from the rail to the ground as stray current. Stray current not only causes corrosion to the steel rail and the metal pipeline and generates harm, but also easily disturbs the rail traffic electric signal and the normal work. Based on the above, the insulation property between the rail and the ground can be enhanced by covering the contact objects such as the rail and the concrete sleeper with the insulating paint; because the train runs on the track for a long time and can vibrate, the paint needs to have certain tensile strength; meanwhile, as a plurality of different types of materials such as steel rails, screws, concrete, rubber, sleepers and the like are arranged in the area covered by the coating, the coating is required to have better adhesion to different materials, so that the coating can be formed into films on different materials to form a protective coating.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the water-based paint suitable for resisting stray current in rail transit and a preparation method thereof; the coating is a two-component coating, and the resin material is a compound of polyurethane and urea-formaldehyde resin. The obtained coating has excellent insulating property, adhesiveness, weather resistance and aging resistance, and can be applied to rail transit such as urban subways, railways, light rails and the like.
The technical scheme of the invention is specifically introduced as follows.
The invention provides a stray current resistant water-based paint for rail traffic, which is used for covering contact objects of steel rails and concrete sleepers, wherein the steel rails, screws, concrete, rubber and sleepers are involved in the coverage area; the paint is a double-component paint, which comprises the following components in parts by weight (70-80): the component A and the component B of (20-30) are composed, and the component B is a curing agent; wherein: the component A comprises the following components in parts by weight:
40-60 parts of aqueous polyurethane dispersoid, 10-25 parts of urea-formaldehyde resin, 2-3 parts of dispersing agent, 20-40 parts of titanium dioxide, 1-2.5 parts of thickening agent, 0.5-1 part of flatting agent and 10-20 parts of water.
In the invention, the aqueous polyurethane dispersion is selected from one of the Bayhydrol A2470,Bayhydrol A2601,Bayhydrol U2757 or Baytec ENC-140P.
In the invention, the dispersing agent is one of Pick DIPERBYK-2059, DIPERBYK-2010, DIPERBYK-2016 or DIPERBYK-2060; the thickener is one or more of Pick RHEOBYK-M2600, RHEYBYK-L1400, RHEYBYK-HV 80 or RHEOBYK-H7625, and the leveling agent is one of Pick BYK3456 or BYK 332.
In the invention, the curing agent of the component B is modified HDI, which is selected from one of Bayhydur ultra 2487/1, bayhydur ultra 304 or Bayhydur ultra 3100.
The invention also provides a preparation method of the stray current resistant water-based paint for rail transit, which comprises the following steps:
(1) Uniformly stirring a dispersing agent, a thickening agent, a leveling agent and water at normal temperature, adding polyurethane dispersoid, urea-formaldehyde resin and titanium dioxide, and uniformly stirring to obtain a component A;
(2) And (3) fully mixing the component A with the component B, wherein the component B is a curing agent, and thus the coating is obtained.
Further, the invention provides application of the stray current resistant water-based paint for rail transit in rail transit, which is used for covering contact objects of steel rails and concrete sleepers, and steel rails, screws, concrete, rubber and sleepers are involved in the coverage area.
Compared with the prior art, the invention has the beneficial effects that:
The invention takes polyurethane as a main body of the coating, urea-formaldehyde resin is added into the coating to obtain the water-based insulating coating for rail traffic, which has excellent mechanical properties and covers the contact objects such as steel rails, concrete sleepers and the like; the urea resin is used as a common adhesive, and has better adhesion to different materials such as steel rails, screws, concrete, rubber, sleepers and the like in the coverage area, so that the paint can be covered by compact films on the different materials to form a firm protective coating; the coating can provide good insulation and stray current resistance; the coating disclosed by the invention has high tensile strength, peeling strength and tensile elasticity, is suitable for rail transit, and can effectively prevent the conditions of paint film fracture, falling off and the like caused by vibration.
Detailed Description
The invention will be further illustrated by the following examples, which are not intended to limit the scope of the invention, for better understanding of the invention.
Example 1
According to the parts by weight, adding 2 parts of dispersant DISPERBYK-2059,1.5 parts of thickener RHEOBYK-L1400,0.8 parts of flatting agent BYK332 and 15 parts of flatting agent BYK332 respectively into a 1L flask, uniformly stirring, adding 45 parts of polyurethane dispersoid Bayhydrol A2470, 15 parts of urea-formaldehyde resin and 25 parts of titanium dioxide, and uniformly stirring at normal temperature to obtain the component A.
The component B is Bayhydur ultra 2487/1 of the kesi.
When in use, 80 parts of the component A and 20 parts of the component B are fully mixed according to parts by weight, so that the required coating is obtained, and the construction is completed within 4 hours.
Example 2
According to parts by weight, 2.5 parts of dispersant DIPERBYK-2010,2 parts of thickener RHEOBYK-HV 80,0.8 parts of flatting agent BYK3456 and 15 parts of flatting agent BYK3456 are respectively added into a 1L flask, 50 parts of polyurethane dispersoid Bayhydrol U2757, 15 parts of urea-formaldehyde resin and 28 parts of titanium pigment are added after being uniformly stirred, and the component A is obtained after being uniformly stirred at normal temperature.
The component B is Bayhydur ultra 2487/1 of the kesi.
When in use, 75 parts of the component A and 25 parts of the component B are fully mixed according to parts by weight, so that the required coating is obtained, and the construction is completed within 4 hours.
Example 3
According to the parts by weight, 3 parts of dispersant DISPERBYK-2060,1.8 parts of thickener RHEOBYK-L1400,0.9 parts of flatting agent BYK332 and 18 parts of flatting agent BYK332 are respectively added into a 1L flask, after being uniformly stirred, 55 parts of polyurethane dispersoid Bayhydrol A2601, 20 parts of urea-formaldehyde resin and 30 parts of titanium dioxide are added, and the component A is obtained after being uniformly stirred at normal temperature.
The component B is a kesi Bayhydur ultra 3100.
When in use, 70 parts of the component A and 30 parts of the component B are fully mixed according to parts by weight, thus obtaining the required coating, and the construction is completed within 5 hours.
Example 4
According to parts by weight, 2.5 parts of dispersant DIPERBYK-2016,2 parts of thickener RHEOBYK-HV 80,1 part of flatting agent BYK3456 and 20 parts of flatting agent BYK3456 are respectively added into a 1L flask, after being uniformly stirred, 60 parts of polyurethane dispersoid Baytec ENC-140P,20 parts of urea resin and 20 parts of titanium pigment are added, and the component A is obtained after being uniformly stirred at normal temperature.
The component B is a kesi Bayhydur ultra 3100.
When in use, 75 parts of the component A and 25 parts of the component B are fully mixed according to parts by weight, so that the required coating is obtained, and the construction is completed within 4 hours.
Comparative example 1
According to parts by weight, 2.5 parts of dispersant DIPERBYK-2016,2 parts of thickener RHEOBYK-HV 80,1 part of flatting agent BYK3456 and 20 parts of flatting agent BYK3456 are respectively added into a 1L flask, after being uniformly stirred, 60 parts of polyurethane dispersoid Baytec ENC-140P and 20 parts of titanium pigment are added, and the component A is obtained after being uniformly stirred at normal temperature.
The component B is a kesi Bayhydur ultra 3100.
When in use, 75 parts of the component A and 25 parts of the component B are fully mixed according to parts by weight, so that the required coating is obtained, and the construction is completed within 4 hours.
Performance testing
The test methods and results are shown in Table 1.'
As can be seen from Table 1, in the comparison of comparative example 1 and example 4, the peel strength was significantly lowered, the tensile strength and the shear strength were also lowered, and the application properties of the coating were lowered without adding urea-formaldehyde resin. The invention is based on polyurethane as a main body of the paint, and urea-formaldehyde resin is added into the paint, so that the paint has the following advantages: 1. the paint film has good insulativity, good stray current resistance, good adhesion, capability of coating the surfaces of various materials, good tensile strength and capability of effectively preventing paint films from falling off caused by vibration, and is suitable for rail transit.
Claims (4)
1. The utility model provides an anti stray current water paint for track traffic, its is used for covering rail and concrete sleeper contact thing, involves rail, screw, concrete, rubber and sleeper in the coverage area, its characterized in that: the coating is a two-component coating, and consists of (70-80) a component A and a component B in parts by weight (20-30), wherein the component B is a curing agent; wherein: the component A comprises the following components in parts by weight:
40-60 parts of aqueous polyurethane dispersoid, 10-25 parts of urea-formaldehyde resin, 2-3 parts of dispersing agent, 20-40 parts of titanium dioxide, 1-2.5 parts of thickening agent, 0.5-1 part of flatting agent and 10-20 parts of water;
The aqueous polyurethane dispersion is selected from kesi Bayhydrol a 2470,Bayhydrol A2601,
One of Bayhydrol U2757 or BaytecENC-140P;
The curing agent of the component B is modified HDI, which is selected from one of the following components of Kogyo-Kai Bayhydurultra 2487/1,Bayhydur ultra 304 or Bayhydurultra 3100.
2. The aqueous coating for rail transit of claim 1, wherein the dispersant is one selected from the group consisting of pith DISPERBYK-2059, DISPERBYK-2010, DISPERBYK-2016 and DISPERBYK-2060; the thickener is selected from one or more of Pick RHEOBYK-M2600, RHEYBYK-L1400, RHEOBYK-HV 80 or RHEOBYK-H7625, and the leveling agent is one of Pick BYK3456 or BYK 332.
3. A method for preparing the stray current resistant aqueous coating for rail transit according to claim 1 or 2, comprising the steps of:
(1) Uniformly stirring a dispersing agent, a thickening agent, a leveling agent and water at normal temperature, adding polyurethane dispersoid, urea-formaldehyde resin and titanium dioxide, and uniformly stirring to obtain a component A;
(2) And (3) fully mixing the component A with the component B, wherein the component B is a curing agent, and thus the stray current resistant water-based paint for rail transit is obtained.
4. Use of the aqueous coating for rail transit according to claim 1 or 2, for the coating of rail transit with aqueous coating of stray current, in particular for rail transit with concrete sleeper contacts, in which the rails, screws, concrete, rubber and sleepers are involved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162079.3A CN117025074B (en) | 2023-09-11 | 2023-09-11 | Stray current resistant water-based paint for rail transit and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311162079.3A CN117025074B (en) | 2023-09-11 | 2023-09-11 | Stray current resistant water-based paint for rail transit and preparation method thereof |
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| CN117025074A CN117025074A (en) | 2023-11-10 |
| CN117025074B true CN117025074B (en) | 2024-10-25 |
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Citations (2)
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| SU978945A1 (en) * | 1980-12-26 | 1982-12-07 | Институт Механики Металлополимерных Систем Ан Бссср | Method of producing coatings on metallic parts |
| WO2004026984A1 (en) * | 2002-09-18 | 2004-04-01 | Nippon Paint Co., Ltd. | Method of adhesion of conductive materials, laminate, and adhesive composition |
| DE102004005207A1 (en) * | 2004-02-03 | 2005-08-11 | Degussa Ag | Use of radiation-curable resins based on ketone and / or urea-aldehyde resins |
| US7272915B2 (en) * | 2004-05-07 | 2007-09-25 | Building Materials Investment Corporation | Shingle and mat tensile strength with urea formaldehyde resin modifier |
| DE102005006296A1 (en) * | 2005-02-11 | 2006-08-24 | Degussa Ag | Aqueous compositions |
| CN104073141B (en) * | 2014-06-24 | 2016-10-05 | 华南理工大学 | A kind of high solid bicomponent polyurethane coating and preparation method thereof |
| CN104804636B (en) * | 2015-04-24 | 2018-05-15 | 肇庆千江高新材料科技股份公司 | The automobile-used aqueous finish paint of self-drying type, the automobile-used aqueous primer surfacer of self-drying type and preparation method and application method |
| CN108864794A (en) * | 2018-07-11 | 2018-11-23 | 合肥铭佑高温技术有限公司 | A kind of coatings of electrical equipment and preparation method thereof |
| MX2021001499A (en) * | 2018-08-08 | 2021-04-28 | Sika Tech Ag | Isocyanate-group-containing polymer having a low content of monomeric diisocyanates. |
| CN111019500A (en) * | 2019-11-12 | 2020-04-17 | 洛阳双瑞防腐工程技术有限公司 | Water-based acrylic polyurethane finish paint for rail transit and preparation method thereof |
| CN112341598A (en) * | 2020-11-25 | 2021-02-09 | 华南理工大学 | Insulating type aqueous polyurethane dispersion and preparation method and application thereof |
| CN218090311U (en) * | 2022-08-26 | 2022-12-20 | 北京全路通铁路专用器材工厂 | Leakage-proof railway track mechanism for track circuit |
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Patent Citations (2)
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| CN107523203A (en) * | 2017-09-24 | 2017-12-29 | 嘉兴御创电力科技有限公司 | A kind of double-component aqueous acroleic acid polyurethane coating and preparation method thereof |
| CN115785785A (en) * | 2022-12-07 | 2023-03-14 | 雨中情防水技术集团股份有限公司 | Water-curing bi-component polyurethane waterproof coating and preparation method thereof |
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