CN108948966B - Water-based epoxy zinc-rich primer for railway wagon and preparation method thereof - Google Patents
Water-based epoxy zinc-rich primer for railway wagon and preparation method thereof Download PDFInfo
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- CN108948966B CN108948966B CN201810844307.8A CN201810844307A CN108948966B CN 108948966 B CN108948966 B CN 108948966B CN 201810844307 A CN201810844307 A CN 201810844307A CN 108948966 B CN108948966 B CN 108948966B
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention relates to a water-based epoxy zinc-rich primer for a railway wagon and a preparation method thereof, wherein the zinc-rich primer is formed by mixing a component A and a component B; the component A is prepared from a water-based epoxy curing agent, a first solvent, an anti-settling agent, a dispersing agent and zinc powder, and the component B is prepared from water-based epoxy resin, a defoaming agent, a flash rust agent, a base material wetting agent and deionized water. The waterborne epoxy zinc-rich primer for the railway wagon provided by the invention adopts waterborne epoxy resin and a waterborne epoxy curing agent as film forming substances, and compared with oily paint, the waterborne epoxy zinc-rich primer is safer and more environment-friendly in transportation, storage and construction processes. The water-based epoxy zinc-rich primer provided by the invention has short paint film drying time, the surface drying time is 30min, the actual drying time is 8 hours, and the working life can be as long as 5-6 hours, can replace solvent-based epoxy zinc-rich primer to be used for corrosion prevention of steel structures, and is particularly suitable for railway wagons.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based epoxy zinc-rich primer for a railway wagon and a preparation method thereof.
Background
The Volatile Organic Compound (VOC) content of the solvent type epoxy zinc-rich primer used for the railway freight car is 500-700g/L during construction, and a large amount of organic solvent is volatilized during construction, so that serious harm is brought to the environment and human health, and potential safety hazards are buried in the production, storage, transportation and construction links. The existing water-based epoxy zinc-rich primer generally has the defects of short pot life, long drying time and the like, and is inconvenient to construct. With the environmental protection requirement of the coating industry and the anticorrosive requirement of the railway freight car, the development of the waterborne epoxy zinc-rich primer with low VOC content, long applicable period and short drying time becomes the development trend of the anticorrosive coating of the railway freight car.
Disclosure of Invention
Aiming at the problems of the existing solvent type epoxy zinc-rich primer, the invention provides the water-based epoxy zinc-rich primer for the railway wagon and the preparation method thereof, and aims to provide the water-based epoxy zinc-rich primer which has long service life, short drying time and corrosion resistance capable of meeting the corrosion resistance requirement of the railway wagon so as to comprehensively replace the solvent type water-based epoxy zinc-rich primer for the railway wagon.
The specific technical scheme is as follows:
the first aspect of the invention provides a water-based epoxy zinc-rich primer for railway freight cars, which is characterized by being formed by mixing a component A and a component B according to the mass ratio of (2-4): 1;
the component A is prepared from the following raw materials in parts by weight:
wherein the component B is prepared from the following raw materials in parts by weight:
the waterborne epoxy zinc-rich primer for the railway wagon is also characterized in that the waterborne epoxy resin is prepared from the following raw materials in parts by weight:
the waterborne epoxy zinc-rich primer for railway freight cars also has the characteristics that the epoxy emulsion is selected from one of Epikote6520 (from Hansen chemical company, USA) or PZ-3961-1 (from Hensman company, USA); the reactive diluent is selected from AGE, AKGE (available from Wuhan green garden Co.) or BKGE (available from Shanghai resin factory); the second solvent was propylene glycol methyl ether acetate (available from sambucus chinensis, inc.); the emulsifier is selected from DISPONIL-500 (available from Pasteur), OP-10 (available from Dow) or ABEX-2005 (available from Rodia).
The waterborne epoxy zinc-rich primer for the railway wagon also has the characteristics that the waterborne epoxy curing agent is selected from one of XZ-H180 (from Shenzhen Xin Ji Hui company) or Banco905 (from Guangzhou Pond); the first solvent is selected from one of propylene glycol methyl ether or ethylene glycol monobutyl ether; the anti-settling agent is selected from one of A300 or A200 (both from Degussa); the dispersant is selected from one of 6208-40 (from Degussa) or Tego740 (from Degussa); the zinc powder is selected from 400 mesh zinc powder or 1000 mesh zinc powder (both from Henan Hehong Zinc industry).
The waterborne epoxy zinc-rich primer for the railway wagon also has the characteristics that the defoaming agent is selected from Tego 902W or Tego810 (both from Degussa); the flash rust agent is selected from one of Raybo 60 (from Raybo USA) or FA179 (from Haimax); the substrate wetting agent is selected from one of WET 270 or BYK346 (available from Degussa).
The second aspect of the invention is to provide a preparation method of the waterborne epoxy zinc-rich primer for railway freight cars, which has the characteristics,
the preparation method of the component A comprises the following steps:
1) mixing and uniformly dispersing the waterborne epoxy curing agent, part of the first solvent and the dispersing agent according to the proportion;
2) adding an anti-settling agent and zinc powder into the feed liquid prepared in the step 1) according to the proportion, dispersing at a high speed until the fineness is less than or equal to 80 micrometers, adjusting the viscosity (ISO6 cup) to be more than or equal to 30 seconds by using the residual first solvent, filtering, removing impurities and packaging;
the preparation method of the component B comprises the following steps:
mixing and uniformly dispersing the waterborne epoxy resin, the defoaming agent, the flash rust agent, the base material wetting agent and the deionized water according to the proportion, filtering and removing impurities, and packaging;
the preparation method of the water-based epoxy resin comprises the following steps:
1) mixing and uniformly stirring the E51 epoxy resin, the reactive diluent and the second solvent according to the proportion, heating to 50-90 ℃, adding the E20 epoxy resin, uniformly stirring after the epoxy resin is molten, cooling to 40-70 ℃, and stirring for 20-30min for later use;
2) dissolving an emulsifier and deionized water in a mutual solution according to a ratio, then dropwise adding the mixture into the feed liquid prepared in the step 1), and uniformly stirring and mixing;
3) and (3) dropwise adding the feed liquid prepared in the step 2) into the epoxy emulsion according to the proportion, dispersing uniformly at a high speed, filtering to remove impurities, and packaging.
The beneficial effect of above-mentioned scheme is:
the waterborne epoxy zinc-rich primer for the railway wagon provided by the invention adopts waterborne epoxy resin and a waterborne epoxy curing agent as film forming substances, and compared with oily paint, the waterborne epoxy zinc-rich primer is safer and more environment-friendly in transportation, storage and construction processes. The water-based epoxy zinc-rich primer provided by the invention has short paint film drying time, the surface drying time is 30min, the actual drying time is 8 hours, and the working life can be as long as 5-6 hours, can replace solvent-based epoxy zinc-rich primer to be used for corrosion prevention of steel structures, and is particularly suitable for railway wagons.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious 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.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
Example 1
A water-based epoxy zinc-rich primer for a railway wagon is formed by mixing a component A and a component B according to the mass ratio of 2: 1;
the preparation method of the component A comprises the following steps:
1) sequentially adding 5 parts by weight of XZ-H180, part of ethylene glycol monobutyl ether and 0.5 part by weight of 6208-40 into a dispersion tank, and uniformly dispersing and mixing;
2) adding 0.5 part by weight of 300A and 60 parts by weight of 400-mesh zinc powder into the feed liquid prepared in the step 1), dispersing at a high speed until the fineness is less than or equal to 80 micrometers, adjusting the viscosity of the feed liquid (ISO6 cup) to be more than or equal to 30 seconds by using the rest ethylene glycol monobutyl ether (the total using amount of two batches of 5 parts by weight), filtering to remove impurities, and packaging;
the preparation method of the component B comprises the following steps:
sequentially adding 45 parts by weight of waterborne epoxy resin, 0.1 part by weight of Tego 902W, 0.5 part by weight of Raybo 60, 0.1 part by weight of WET 270 and 5 parts by weight of deionized water into a dispersion tank, uniformly dispersing and mixing, filtering to remove impurities and packaging;
the preparation method of the water-based epoxy resin in the component B comprises the following steps:
1) adding 10 parts by weight of E51 epoxy resin, 5 parts by weight of AGE and 5 parts by weight of propylene glycol methyl ether acetate into a reaction kettle, mixing and stirring uniformly, heating to 50 ℃, adding 5 parts by weight of E20 epoxy resin, stirring uniformly after the E20 epoxy resin is molten, cooling to 40 ℃, and stirring for 20min for later use;
2) dissolving 1 part by weight of DISPONIL-500 and 5 parts by weight of deionized water mutually, then dropwise adding the solution after mutual dissolving into the feed liquid prepared in the step 1) by using a dropping funnel, and stirring and mixing uniformly;
3) adding 10 parts by weight of Epikote6520 into a reaction kettle, and stirring; dropwise adding the feed liquid prepared in the step 2) into the epoxy emulsion through a dropping funnel, dispersing uniformly at a high speed, filtering to remove impurities, and packaging.
Example 2
A water-based epoxy zinc-rich primer for a railway wagon is formed by mixing a component A and a component B according to the mass ratio of 3: 1;
the preparation method of the component A comprises the following steps:
1) sequentially adding 12 parts by weight of Banco905, part of propylene glycol methyl ether and 2.7 parts by weight of Tego740 into a dispersion tank, and uniformly dispersing and mixing;
2) adding 1.7 parts by weight of A200 and 73 parts by weight of 1000-mesh zinc powder into the feed liquid prepared in the step 1), dispersing at a high speed until the fineness is less than or equal to 80 micrometers, adjusting the viscosity of the feed liquid (ISO6 cup) to be more than or equal to 30 seconds by using the rest propylene glycol methyl ether (the total dosage of the two batches of propylene glycol methyl ether is 15 parts by weight), filtering, removing impurities and packaging;
the preparation method of the component B comprises the following steps:
adding 67 parts by weight of waterborne epoxy resin, 3.1 parts by weight of Tego810, 3.2 parts by weight of FA179, 3.5 parts by weight of BYK346 and 17 parts by weight of deionized water into a dispersion tank in sequence, dispersing and mixing uniformly, filtering to remove impurities and packaging;
the preparation method of the water-based epoxy resin comprises the following steps:
1) adding 17 parts by weight of E51 epoxy resin, 25 parts by weight of BKGE and 16 parts by weight of propylene glycol methyl ether acetate into a reaction kettle, mixing and stirring uniformly, heating to 69 ℃, adding 9 parts by weight of E20 epoxy resin, stirring uniformly after the E20 epoxy resin is molten, cooling to 60 ℃, and stirring for 25min for later use;
2) dissolving 3 parts by weight of OP-10 and 28 parts by weight of deionized water mutually, then dropwise adding the solution after mutual dissolution into the feed liquid prepared in the step 1) by using a dropping funnel, and stirring and mixing uniformly;
3) adding 29 parts by weight of PZ-3961-1 into a reaction kettle, and stirring; dropwise adding the feed liquid prepared in the step 2) into the epoxy emulsion through a dropping funnel, dispersing uniformly at a high speed, filtering to remove impurities, and packaging.
Example 3
A water-based epoxy zinc-rich primer for a railway wagon is formed by mixing a component A and a component B according to a mass ratio of 4: 1;
the preparation method of the component A comprises the following steps:
1) sequentially adding 20 parts by weight of XZ-H180, part of propylene glycol methyl ether and 5 parts by weight of Tego740 into a dispersion tank, and uniformly dispersing and mixing;
2) adding 3 parts by weight of 300A and 88 parts by weight of 1000-mesh zinc powder into the feed liquid prepared in the step 1), dispersing at a high speed until the fineness is less than or equal to 80 micrometers, adjusting the viscosity of the feed liquid to be more than or equal to 30 seconds by using the rest propylene glycol methyl ether (the total using amount of the two batches of propylene glycol methyl ether is 25 parts by weight), filtering and removing impurities, and packaging;
the preparation method of the component B comprises the following steps:
sequentially adding 90 parts by weight of waterborne epoxy resin, 5 parts by weight of Tego 902W, 5 parts by weight of FA179, 5 parts by weight of WET 270 and 25 parts by weight of deionized water into a dispersion tank, uniformly dispersing and mixing, filtering to remove impurities and packaging;
the preparation method of the water-based epoxy resin comprises the following steps:
1) adding 25 parts by weight of E51 epoxy resin, 40 parts by weight of AKGE and 25 parts by weight of propylene glycol methyl ether acetate into a reaction kettle, mixing and stirring uniformly, heating to 90 ℃, adding 15 parts by weight of E20 epoxy resin, stirring uniformly after melting, cooling to 70 ℃, and stirring for 30min for later use;
2) dissolving 5 parts by weight of ABEX-2005 and 40 parts by weight of deionized water mutually, then dropwise adding the solution after mutual dissolving into the feed liquid prepared in the step 1) by using a dropping funnel, and stirring and mixing uniformly;
3) adding 40 parts by weight of Epikote6520 into a reaction kettle, and stirring; dropwise adding the feed liquid prepared in the step 2) into the epoxy emulsion through a dropping funnel, dispersing uniformly at a high speed, filtering to remove impurities, and packaging.
The results of the performance tests on the waterborne epoxy zinc rich primers for rail wagons provided in examples 1-3 of the present invention are as follows:
as can be seen from the table above, the epoxy zinc-rich primer provided by the invention has excellent comprehensive performance, can be suitable for railway freight cars and meets the anti-corrosion requirements of the railway freight cars.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. The water-based epoxy zinc-rich primer for the rail wagon is characterized by being formed by mixing a component A and a component B according to a mass ratio of (2-4) to 1;
the component A is prepared from the following raw materials in parts by weight:
wherein the waterborne epoxy curing agent is selected from one of XZ-H180 or Banco 905;
wherein the component B is prepared from the following raw materials in parts by weight:
the waterborne epoxy resin is prepared from the following raw materials in parts by weight:
wherein the epoxy emulsion is selected from one of Epikote6520 or PZ-3961-1.
2. The waterborne epoxy zinc rich primer for rail wagons according to claim 1, wherein the reactive diluent is selected from one of AGE, AKGE or BKGE; the second solvent is propylene glycol methyl ether acetate; the emulsifier is selected from DISPONIL-500, OP-10 or ABEX-2005.
3. The waterborne epoxy zinc rich primer for railway freight cars as claimed in claim 1 or 2, wherein the first solvent is selected from one of propylene glycol methyl ether or ethylene glycol monobutyl ether; the anti-settling agent is selected from one of A300 or A200; the dispersant is selected from one of 6208-40 or Tego 740; the zinc powder is selected from one of 400-mesh zinc powder or 1000-mesh zinc powder.
4. The waterborne epoxy zinc rich primer for railway trucks according to claim 1 or 2, wherein the defoamer is selected from one of Tego 902W or Tego 810; the flash rust agent is selected from one of Raybo 60 or FA 179; the substrate wetting agent is selected from one of WET 270 or BYK 346.
5. A process for preparing a waterborne epoxy zinc rich primer for railway wagons according to any one of claims 1 to 4,
the preparation method of the component A comprises the following steps:
1) mixing and uniformly dispersing the waterborne epoxy curing agent, part of the first solvent and the dispersing agent according to the proportion;
2) adding an anti-settling agent and zinc powder into the feed liquid prepared in the step 1) according to the proportion, dispersing at high speed until the fineness is less than or equal to 80 microns, adjusting the viscosity to be more than or equal to 30 seconds by using the residual first solvent, filtering to remove impurities, and packaging;
the preparation method of the component B comprises the following steps:
mixing and uniformly dispersing the waterborne epoxy resin, the defoaming agent, the flash rust agent, the base material wetting agent and the deionized water according to the proportion, filtering and removing impurities, and packaging;
the preparation method of the water-based epoxy resin comprises the following steps:
1) mixing and uniformly stirring the E51 epoxy resin, the reactive diluent and the second solvent according to the proportion, heating to 50-90 ℃, adding the E20 epoxy resin, uniformly stirring after the epoxy resin is molten, cooling to 40-70 ℃, and stirring for 20-30min for later use;
2) dissolving an emulsifier and deionized water in a mutual solution according to a ratio, then dropwise adding the mixture into the feed liquid prepared in the step 1), and uniformly stirring and mixing;
3) and (3) dropwise adding the feed liquid prepared in the step 2) into the epoxy emulsion according to the proportion, dispersing uniformly at a high speed, filtering to remove impurities, and packaging.
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| CN201810844307.8A CN108948966B (en) | 2018-07-27 | 2018-07-27 | Water-based epoxy zinc-rich primer for railway wagon and preparation method thereof |
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| CN201810844307.8A CN108948966B (en) | 2018-07-27 | 2018-07-27 | Water-based epoxy zinc-rich primer for railway wagon and preparation method thereof |
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| CN108948966B true CN108948966B (en) | 2020-11-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103087612A (en) * | 2013-01-30 | 2013-05-08 | 株洲飞鹿高新材料技术股份有限公司 | Room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103087612A (en) * | 2013-01-30 | 2013-05-08 | 株洲飞鹿高新材料技术股份有限公司 | Room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and preparation method thereof |
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Inventor after: Xiao Yan Inventor after: Shi Zhonghua Inventor after: Zhang Xingsong Inventor after: Yang Jun Inventor after: He Yuping Inventor after: Tao Jiafa Inventor after: Chen Qiang Inventor after: Zhou Zengguang Inventor after: Liu Huaxue Inventor after: Guo Haitao Inventor before: Xiao Yan Inventor before: Guo Haitao Inventor before: He Yuping Inventor before: Tao Jiafa Inventor before: Chen Qiang Inventor before: Zhou Zengguang Inventor before: Liu Huaxue Inventor before: Liu Junxiang Inventor before: Fan Guodong Inventor before: Li Debin |
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