CN114773936A - Environment-friendly low-VOC (volatile organic compound) anticorrosive paint and preparation method thereof - Google Patents
Environment-friendly low-VOC (volatile organic compound) anticorrosive paint and preparation method thereof Download PDFInfo
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- CN114773936A CN114773936A CN202210591093.4A CN202210591093A CN114773936A CN 114773936 A CN114773936 A CN 114773936A CN 202210591093 A CN202210591093 A CN 202210591093A CN 114773936 A CN114773936 A CN 114773936A
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention discloses an environment-friendly low-VOC (volatile organic compound) anticorrosive paint and a preparation method thereof, wherein the anticorrosive paint consists of a primer and a scratch-resistant paint; the primer comprises the following raw materials in parts by weight: 55-60 parts of water-based EAU acrylic emulsion; 15-25 parts of chlorinated rubber epoxy resin; 0.1-3.5 parts of an auxiliary agent; 10-25 parts of a filler; the scratch-resistant paint comprises the following raw materials in parts by weight: 35-40 parts of a polyacrylate emulsion; 0.1-5.5 parts of nano bamboo charcoal fiber; 0.1-3.5 parts of graphene powder; 0.1-0.5 part of phenanthroline; 0.1-1.5 parts of a dispersing agent; 3-6 parts of a solvent. According to the invention, by adding the nano bamboo charcoal fiber, the dispersion performance can be improved, the overall performance is further improved, a small amount of VOC gas can be absorbed, the indoor use requirement of the coating is further met, the environment cannot be greatly influenced, and the coating is suitable for popularization and use.
Description
Technical Field
The invention relates to the technical field of anticorrosive coatings, in particular to an environment-friendly low-VOC anticorrosive coating and a preparation method thereof.
Background
The anticorrosive coating refers to a liquid or solid material which can form a film on the surface of an object under certain conditions to protect, decorate or perform other special functions (insulation, rust prevention, mildew prevention, heat resistance and the like). Since the early coatings mostly used vegetable oils as the main raw material, they were also called paints. Synthetic resins have now largely or completely replaced vegetable oils and are therefore known as coatings. The main functions are three points: protect, decorate, and cover the defect of product, promote the value of product. Epoxy anticorrosion coatings are typically composed of two components, an epoxy resin and a curing agent. The nature of the curing agent also affects the properties of the paint film. Commonly used curing agents are: aliphatic amine and its modifier, the characteristic is that can be solidified at normal temperature, the toxicity of unmodified aliphatic amine is greater, aromatic amine and its modifier, the characteristic is that the reaction is slow, must heat and solidify often, the toxicity is weaker, perchloro-ethylene lacquer, polyamide resin, characteristic is that weather resistance is better, toxicity is smaller, the elasticity is good, the corrosion resisting property is slightly poor, phenol-formaldehyde resin, urea-formaldehyde resin, etc.
The invention provides an environment-friendly low-VOC anticorrosive paint and a preparation method thereof, wherein various organic chemical substances are added into the existing anticorrosive paint, and when the organic chemical substances are at high temperature, VOC gas can be emitted to further influence the surrounding environment.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an environment-friendly low-VOC anticorrosive paint and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
an environment-friendly low-VOC (volatile organic compound) anticorrosive paint, which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
55-60 parts of water-based EAU acrylic emulsion;
15-25 parts of chlorinated rubber epoxy resin;
0.1-3.5 parts of an auxiliary agent;
10-25 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
35-40 parts of a polyacrylate emulsion;
0.1-5.5 parts of nano bamboo charcoal fiber;
0.1-3.5 parts of graphene powder;
0.1-0.5 parts of phenanthroline;
0.1-1.5 parts of a dispersant;
3-6 parts of a solvent.
Preferably, the anticorrosive paint consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
55 parts of water-based EAU acrylic emulsion;
15 parts of chlorinated rubber epoxy resin;
0.1 part of an auxiliary agent;
10 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
35 parts of polyacrylate emulsion;
0.1 part of nano bamboo charcoal fiber;
0.1 part of graphene powder;
0.1 part of phenanthroline;
0.1 part of a dispersant;
and 3 parts of a solvent.
Preferably, the anticorrosive paint consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
57 parts of aqueous EAU acrylic emulsion;
20 parts of chlorinated rubber epoxy resin;
2 parts of an auxiliary agent;
18 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
38 parts of polyacrylate emulsion;
3 parts of nano bamboo charcoal fiber;
2 parts of graphene powder;
0.3 part of phenanthroline;
1 part of a dispersant;
4.5 parts of a solvent.
Preferably, the anticorrosive paint consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
60 parts of water-based EAU acrylic emulsion;
25 parts of chlorinated rubber epoxy resin;
3.5 parts of an auxiliary agent;
25 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
40 parts of polyacrylate emulsion;
5.5 parts of nano bamboo charcoal fiber;
3.5 parts of graphene powder;
0.5 part of phenanthroline;
1.5 parts of a dispersing agent;
6 parts of a solvent.
Preferably, the auxiliary agent is a siloxane type defoaming agent, an anti-flash rust agent, a surfactant and/or a siloxane type leveling agent; the surfactant is one of sodium dodecyl sulfate, tween 60 or span 60; the flash rust inhibitor is nitrite solution.
Preferably, the filler is one or more of feldspar powder, mica powder, vermiculite powder, titanium dioxide, silica and mica iron oxide.
Preferably, the solid content of the polyacrylate emulsion is 45-50%, and the pH value is 7-8.
Preferably, the solvent is a mixture of butyl acetate and 150# solvent oil.
A preparation method of an environment-friendly low-VOC anticorrosive paint comprises the following steps:
step one, putting the filler in a grinder in a corresponding weight part for fully grinding, putting the ground filler into a stirrer for fully stirring after fully grinding, putting the auxiliary agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the water-based EAU acrylic emulsion and the chlorinated rubber epoxy resin in corresponding parts by weight into a reaction kettle, mixing and stirring for 8-15 min at the reaction temperature of 60-75 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 75-95 ℃, and stirring for 15-20 min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder in a grinding machine in a corresponding weight part for fully grinding, placing the ground graphene powder in a stirring machine for fully stirring after fully grinding, placing phenanthrene and nano bamboo charcoal fiber in the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting the solvent, the polyacrylate emulsion and the dispersing agent in corresponding parts by weight into a reaction kettle, and mixing and stirring for 5-10 min at the reaction temperature of 40-60 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to be 40-60 ℃, and stirring for 4-8 min to obtain the scratch-resistant paint.
The invention has the following technical effects:
1. according to the invention, a dispersion system is formed by the graphene powder, the nano bamboo charcoal fiber, the dispersing agent and the emulsion, so that the possibility of agglomeration of the graphene in a coating system is favorably reduced, the graphene is favorably and uniformly dispersed in the coating system, the graphene and other components can play a great synergistic effect, and the overall performance of the coating is effectively improved.
2. According to the invention, by adding the nano bamboo charcoal fiber, the dispersion performance can be improved, the overall performance is further improved, a small amount of VOC gas can be absorbed, the indoor use requirement of the coating is further met, the environment cannot be greatly influenced, and the coating is suitable for popularization and use.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example 1
The invention provides an environment-friendly low-VOC anticorrosive paint which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
55kg of aqueous EAU acrylic emulsion;
15kg of chlorinated rubber epoxy resin;
0.1kg of siloxane type defoaming agent;
10kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
35kg of polyacrylate emulsion;
0.1kg of nano bamboo charcoal fiber;
0.1kg of graphene powder;
0.1kg of phenanthroline;
0.1kg of dispersant;
3kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive paint, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the aqueous EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, and mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with a corresponding weight into a grinding machine for fully grinding, placing the ground graphene powder into a stirring machine for fully stirring after fully grinding, placing phenanthrene and nano bamboo charcoal fiber into the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting a mixture of butyl acetate and 150# solvent oil, polyacrylate emulsion and a dispersing agent with corresponding weight into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface of the metal pipeline is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 micrometers, and the thickness of the scratch-resistant paint is 150-200 micrometers.
Example 2
The invention provides an environment-friendly low-VOC (volatile organic compound) anticorrosive paint, which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
57kg of aqueous EAU acrylic emulsion;
20kg of chlorinated rubber epoxy resin;
2kg of siloxane type defoaming agent;
18kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
38kg of polyacrylate emulsion;
3kg of nano bamboo charcoal fiber;
2kg of graphene powder;
0.3kg of phenanthroline;
1kg of dispersing agent;
4.5kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive paint, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the water-based EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with a corresponding weight into a grinding machine for fully grinding, placing the ground graphene powder into a stirring machine for fully stirring after fully grinding, placing phenanthrene and nano bamboo charcoal fiber into the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting a mixture of butyl acetate and No. 150 solvent oil with corresponding weight, polyacrylate emulsion and a dispersing agent into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 mu m, and the thickness of the scratch-resistant paint is 150-200 mu m.
Example 3
The invention provides an environment-friendly low-VOC anticorrosive paint which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
56kg of aqueous EAU acrylic emulsion;
17kg of chlorinated rubber epoxy resin;
1.1kg of siloxane type defoaming agent;
13kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
36kg of polyacrylate emulsion;
2.1kg of nano bamboo charcoal fiber;
1.5kg of graphene powder;
0.2kg of phenanthroline;
0.3kg of dispersing agent;
3.8kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive paint, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the water-based EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with a corresponding weight into a grinding machine for full grinding, placing the graphene powder into a stirrer for full stirring after full grinding, then placing phenanthroline and nano bamboo charcoal fiber into the stirrer for stirring, and obtaining mixed powder B after full stirring;
putting a mixture of butyl acetate and No. 150 solvent oil with corresponding weight, polyacrylate emulsion and a dispersing agent into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 mu m, and the thickness of the scratch-resistant paint is 150-200 mu m.
Example 4
The invention provides an environment-friendly low-VOC anticorrosive paint which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
58kg of aqueous EAU acrylic emulsion;
21kg of chlorinated rubber epoxy resin;
2.2kg of siloxane defoaming agent;
20kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
39kg of polyacrylate emulsion;
3.5kg of nano bamboo charcoal fiber;
2.3kg of graphene powder;
0.35kg of phenanthroline;
1.2kg of dispersing agent;
5kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive paint, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinding machine for fully grinding, putting into a stirrer for fully stirring after fully grinding, putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the aqueous EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, and mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with a corresponding weight into a grinding machine for fully grinding, placing the ground graphene powder into a stirring machine for fully stirring after fully grinding, placing phenanthrene and nano bamboo charcoal fiber into the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting a mixture of butyl acetate and 150# solvent oil, polyacrylate emulsion and a dispersing agent with corresponding weight into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 mu m, and the thickness of the scratch-resistant paint is 150-200 mu m.
Example 5
The invention provides an environment-friendly low-VOC (volatile organic compound) anticorrosive paint, which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
59kg of aqueous EAU acrylic emulsion;
24kg of chlorinated rubber epoxy resin;
3.3kg of siloxane type defoaming agent;
24kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
39kg of polyacrylate emulsion;
4kg of nano bamboo charcoal fiber;
3.1kg of graphene powder;
0.4kg of phenanthroline;
1.3kg of dispersing agent;
5kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive paint, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the water-based EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with a corresponding weight into a grinding machine for fully grinding, placing the ground graphene powder into a stirring machine for fully stirring after fully grinding, placing phenanthrene and nano bamboo charcoal fiber into the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting a mixture of butyl acetate and 150# solvent oil, polyacrylate emulsion and a dispersing agent with corresponding weight into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 mu m, and the thickness of the scratch-resistant paint is 150-200 mu m.
Example 6
The invention provides an environment-friendly low-VOC (volatile organic compound) anticorrosive paint, which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
60kg of aqueous EAU acrylic emulsion;
25kg of chlorinated rubber epoxy resin;
3.5kg of siloxane type defoaming agent;
25kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
40kg of polyacrylate emulsion;
5.5kg of nano bamboo charcoal fiber;
3.5kg of graphene powder;
0.5kg of phenanthroline;
1.5kg of dispersing agent;
6kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive coating, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the aqueous EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, and mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with a corresponding weight into a grinding machine for full grinding, placing the graphene powder into a stirrer for full stirring after full grinding, then placing phenanthroline and nano bamboo charcoal fiber into the stirrer for stirring, and obtaining mixed powder B after full stirring;
putting a mixture of butyl acetate and No. 150 solvent oil with corresponding weight, polyacrylate emulsion and a dispersing agent into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 mu m, and the thickness of the scratch-resistant paint is 150-200 mu m.
Comparative example 1
The invention provides an environment-friendly low-VOC (volatile organic compound) anticorrosive paint, which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
57kg of aqueous EAU acrylic emulsion;
20kg of chlorinated rubber epoxy resin;
2kg of siloxane type defoaming agent;
18kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
38kg of polyacrylate emulsion;
2kg of graphene powder;
0.3kg of phenanthroline;
1kg of dispersing agent;
4.5kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive paint, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the aqueous EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, and mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder with corresponding weight into a grinding machine for fully grinding, placing the ground graphene powder into a stirring machine for fully stirring after fully grinding, placing the o-phenanthroline into the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting a mixture of butyl acetate and No. 150 solvent oil with corresponding weight, polyacrylate emulsion and a dispersing agent into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface of the metal pipeline is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 micrometers, and the thickness of the scratch-resistant paint is 150-200 micrometers.
Comparative example 2
The invention provides an environment-friendly low-VOC anticorrosive paint which consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials by weight:
57kg of aqueous EAU acrylic emulsion;
20kg of chlorinated rubber epoxy resin;
2kg of siloxane type defoaming agent;
18kg of titanium dioxide;
the scratch-resistant paint comprises the following raw materials in parts by weight:
38kg of polyacrylate emulsion;
3kg of nano bamboo charcoal fiber;
1kg of dispersing agent;
4.5kg of a mixture of butyl acetate and 150# solvent oil.
The invention provides a preparation method of an environment-friendly low-VOC anticorrosive coating, which comprises the following steps:
step one, putting titanium dioxide with corresponding weight into a grinder for fully grinding, after fully grinding, putting into a stirrer for fully stirring, then putting a siloxane type defoaming agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the water-based EAU acrylic emulsion and the chlorinated rubber epoxy resin with the corresponding weight into a reaction kettle, mixing and stirring for 10min at the reaction temperature of 65 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 80 ℃, and stirring for 18min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing the nano bamboo charcoal fiber with the corresponding weight into a stirrer for stirring, and fully stirring to obtain mixed powder B;
putting a mixture of butyl acetate and 150# solvent oil, polyacrylate emulsion and a dispersing agent with corresponding weight into a reaction kettle, and mixing and stirring for 8min at 55 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to 55 ℃, and stirring for 6min to obtain the scratch-resistant paint.
When the paint is used, the primer is sprayed on a metal pipeline, and after the surface of the metal pipeline is dried, the scratch-resistant paint is sprayed, wherein the thickness of the primer is 80-100 micrometers, and the thickness of the scratch-resistant paint is 150-200 micrometers.
Experiment 1: acid resistance measurement
Two samples (with an interval of 24h) were applied to both sides of the test panel, respectively, and left for 24 h. The test piece was coated with a film on the periphery thereof, and the coated piece was sealed with a sample having a width of 5mm or more and left for 6 days. The periphery of the test panel was then immersed in molten paraffin sequentially: the rosin is 1: 1, the first overlap is 3mm and the second overlap is 5 mm. After the sample is placed for 1h, the sample is placed in a transparent container filled with sulfuric acid (5 (W/V)%) until the phenomena of chalking, foaming, peeling and the like of a coating film occur, and the soaking time of the sample in the sulfuric acid is recorded.
Experiment 2: determination of neutral salt spray resistance
The neutral salt spray resistance of each coating was determined according to standard GB/T1771-91.
Experiment 3: determination of adhesion after Smoke test
And (3) determining the adhesion of each anticorrosive paint subjected to the neutral salt spray resistance test in the experiment 2 according to a pull-open method in the GB/T5210-2006.
Experiment 4: resistance to artificial weathering
The weathering resistance of the respective anticorrosive coatings was determined in accordance with the standard GB/T1865-2009, and the exposure was stopped when the film had chalking, discoloration or discoloration and the duration of the exposure was recorded.
The environment-friendly low-VOC anticorrosive coating provided by the invention has better adhesive force, acid resistance, neutral salt spray resistance and artificial weather aging resistance, and shows that the environment-friendly low-VOC anticorrosive coating disclosed by the invention has better weather resistance and can play a role in protecting a base material in a relatively harsh environment. According to the invention, a dispersion system is formed by the graphene powder, the nano bamboo charcoal fiber, the dispersing agent and the emulsion, so that the possibility of agglomeration of the graphene in a coating system is favorably reduced, the graphene is favorably and uniformly dispersed in the coating system, the graphene and other components can play a great synergistic effect, and the overall performance of the coating is effectively improved.
Experiment 5: detection of VOC gas in use environment
The metal pipelines in the 8 embodiments are respectively placed in a closed box, a GT series PID gas detector is respectively installed in the closed box, the temperature is controlled at 40 ℃, and the VOC gas concentration is respectively controlled at 5 hours, 24 hours, 5 days, 15 days and 2 months, the unit is: mg/m3The statistical data are shown in the following table.
The environment-friendly low-VOC anticorrosive coating provided by the invention can effectively reduce the emission of VOC gas when the anticorrosive coating is used, further improves the environmental quality, avoids the influence of the VOC gas on the environment, and compared with comparative example 1 and comparative example 2, the VOC gas detection concentration of the embodiment is higher and exceeds the standard value by 0.12mg/m because the nano bamboo charcoal fiber is not added in the comparative example 13Therefore, the nano bamboo charcoal fiber is added, so that the dispersion performance can be improved, the overall performance is improved, a small amount of VOC gas can be absorbed, the requirement of the coating for indoor use is met, the environment cannot be greatly influenced, and the nano bamboo charcoal fiber is suitable for popularization and use.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The environment-friendly low-VOC anticorrosive paint is characterized by consisting of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
55-60 parts of water-based EAU acrylic emulsion;
15-25 parts of chlorinated rubber epoxy resin;
0.1-3.5 parts of an auxiliary agent;
10-25 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
35-40 parts of a polyacrylate emulsion;
0.1-5.5 parts of nano bamboo charcoal fiber;
0.1-3.5 parts of graphene powder;
0.1-0.5 parts of phenanthroline;
0.1-1.5 parts of a dispersing agent;
3-6 parts of a solvent.
2. The environment-friendly low-VOC anticorrosive coating of claim 1, characterized in that the anticorrosive coating consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
55 parts of aqueous EAU acrylic emulsion;
15 parts of chlorinated rubber epoxy resin;
0.1 part of an auxiliary agent;
10 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
35 parts of polyacrylate emulsion;
0.1 part of nano bamboo charcoal fiber;
0.1 part of graphene powder;
0.1 part of phenanthroline;
0.1 part of a dispersant;
and 3 parts of a solvent.
3. The environment-friendly low-VOC anticorrosive coating of claim 1, characterized in that the anticorrosive coating consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
57 parts of water-based EAU acrylic emulsion;
20 parts of chlorinated rubber epoxy resin;
2 parts of an auxiliary agent;
18 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
38 parts of polyacrylate emulsion;
3 parts of nano bamboo charcoal fiber;
2 parts of graphene powder;
0.3 part of phenanthroline;
1 part of a dispersant;
4.5 parts of a solvent.
4. The environment-friendly low-VOC anticorrosive coating according to claim 1, characterized in that the anticorrosive coating consists of a primer and a scratch-resistant paint;
the primer comprises the following raw materials in parts by weight:
60 parts of aqueous EAU acrylic emulsion;
25 parts of chlorinated rubber epoxy resin;
3.5 parts of an auxiliary agent;
25 parts of a filler;
the scratch-resistant paint comprises the following raw materials in parts by weight:
40 parts of polyacrylate emulsion;
5.5 parts of nano bamboo charcoal fiber;
3.5 parts of graphene powder;
0.5 part of phenanthroline;
1.5 parts of a dispersing agent;
6 parts of a solvent.
5. The environment-friendly low-VOC anticorrosive coating according to claim 1, characterized in that the auxiliary agent is a siloxane-based defoamer, a flash rust inhibitor, a surfactant and/or a siloxane-based leveling agent; the surfactant is one of sodium dodecyl sulfate, tween 60 or span 60; the flash rust inhibitor is nitrite solution.
6. The environment-friendly low-VOC anticorrosive paint of claim 1, wherein the filler is one or more of feldspar powder, mica powder, vermiculite powder, titanium dioxide, silica and micaceous iron oxide.
7. The environment-friendly low-VOC anticorrosive coating as claimed in claim 1, wherein the polyacrylate emulsion has a solid content of 45-50% and a pH value of 7-8.
8. The environment-friendly low-VOC anticorrosive paint of claim 1, wherein the solvent is a mixture of butyl acetate and No. 150 solvent oil.
9. The method for preparing the environment-friendly low-VOC anticorrosive paint as claimed in any one of claims 1 to 8, wherein the method for preparing the primer comprises the following steps:
step one, putting the filler in a grinder in a corresponding weight part for fully grinding, after fully grinding, putting the ground filler into a stirrer for fully stirring, then putting the auxiliary agent into the stirrer for stirring, and fully stirring to obtain mixed powder A;
step two, putting the water-based EAU acrylic emulsion and the chlorinated rubber epoxy resin in corresponding parts by weight into a reaction kettle, mixing and stirring for 8-15 min at the reaction temperature of 60-75 ℃ to obtain a mixed liquid A;
step three, putting the mixed powder A into the mixed liquid A, adjusting the reaction temperature to 75-95 ℃, and stirring for 15-20 min to obtain the primer;
the preparation method of the scratch-resistant paint comprises the following steps:
step one, placing graphene powder in a grinding machine in a corresponding weight part for fully grinding, placing the ground graphene powder in a stirring machine for fully stirring after fully grinding, placing phenanthrene and nano bamboo charcoal fiber in the stirring machine for stirring, and obtaining mixed powder B after fully stirring;
putting the solvent, the polyacrylate emulsion and the dispersing agent in corresponding parts by weight into a reaction kettle, and mixing and stirring for 5-10 min at the reaction temperature of 40-60 ℃ to obtain a mixed liquid B;
and step three, putting the mixed powder B into the mixed liquid B, adjusting the reaction temperature to be 40-60 ℃, and stirring for 4-8 min to obtain the scratch-resistant paint.
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