CN114921151A - Production process of water-based epoxy graphene priming paint with rust - Google Patents
Production process of water-based epoxy graphene priming paint with rust Download PDFInfo
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- CN114921151A CN114921151A CN202210664862.9A CN202210664862A CN114921151A CN 114921151 A CN114921151 A CN 114921151A CN 202210664862 A CN202210664862 A CN 202210664862A CN 114921151 A CN114921151 A CN 114921151A
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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
- C09D5/002—Priming 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
- 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
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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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Abstract
The invention relates to the technical field of metal rust prevention treatment, in particular to a production process of a water-based epoxy graphene priming paint with rust; the aqueous epoxy graphene rusty primer is prepared from a component A: the component B comprises the following components in percentage by mass 15: 2, wherein the component A is prepared from the following components: epoxy resin emulsion, rust converting agent, talcum powder, graphene, zinc powder, nano silicon dioxide, graphene dispersing agent, defoaming agent, flatting agent and the balance of water; the component B consists of the following components: the epoxy resin curing agent and the corresponding production process include the following steps: preparing raw materials for later use; adding raw materials to prepare a mixed resin solution; stirring and grinding to prepare slurry; preparing a component A; the rust primer can be prepared by adding the epoxy resin curing agent into the component A, so that the addition amount of zinc powder is reduced, and the development requirement of environmental protection is met on the basis of meeting the corrosion resistance of the rust primer.
Description
Technical Field
The invention relates to the technical field of metal rust prevention treatment, in particular to a production process of a water-based epoxy graphene priming paint with rust.
Background
The corrosion can cause a great deal of damage to the metal, the surface protection of the metal is promoted by adopting a mode of spraying anticorrosive paint, the surface treatment of the steel surface needs to be carried out by adopting modes of sand blasting, manual or electric tools and the like before the spraying, and then the paint is sprayed, so that the efficiency is slow and a great deal of cost is consumed;
in the prior art, in order to reduce unnecessary construction cost, the water-based primer with rust is provided, the primer with rust is directly sprayed on the surface of steel, zinc powder is added into the primer with rust, and the subsequent rusting of the steel is avoided through the cathodic protection effect on the steel.
However, in the use process of the rusted paint, the problem of environmental protection caused by adding a large amount of zinc powder into the paint is found, the quality of the primer is high, and the primer does not accord with the concept of environmental protection.
Disclosure of Invention
The invention aims to provide a production process of a water-based epoxy graphene priming paint with rust, which aims to solve the problem that the priming paint with rust in the prior art is not environment-friendly due to the fact that the priming paint with rust is rich in zinc powder.
In order to achieve the purpose, the invention provides a water-based epoxy graphene rusty primer, which is prepared from a component A: the component B comprises the following components in percentage by mass 15: 2, wherein the component A is prepared from the following components in parts by weight:
and the balance water;
the component B comprises the following components in parts by weight:
8-12 parts of an epoxy resin curing agent.
The composition of the priming paint with rust is improved, and the graphene is additionally arranged, so that the use of zinc powder is greatly reduced, the environment-friendly performance is effectively improved on the basis of not reducing the protective capability of the priming paint with rust, and the requirement of green development is met.
Wherein the rust converting agent is made from propylene glycol and gallic acid.
The composition of the rust conversion agent is improved, and the malonic acid and the gallic acid are used for preparing the rust conversion agent so as to improve the conversion capability of the prepared primer with rust on rust.
The invention also provides a production process of the water-based epoxy graphene rusty primer, which is used for preparing the water-based epoxy graphene rusty primer,
the method comprises the following steps:
preparing a rust converting agent and an epoxy resin curing agent for later use;
weighing the epoxy resin emulsion according to parts by weight, and sequentially adding talcum powder, graphene, a graphene dispersing agent, a flatting agent, a defoaming agent and nano silicon dioxide according to parts by weight to prepare a mixed resin liquid;
stirring the mixed resin liquid, and grinding the mixed resin liquid to be less than 50 microns by a grinder to prepare slurry;
adding zinc powder and a rust converting agent into the slurry according to the parts by weight, sieving by a screen, and adding the balance of water to prepare a component A;
and adding an epoxy resin curing agent into the component A to prepare the primer with rust.
The production process of the rust primer is improved corresponding to the change of the rust primer, so that the production process is suitable for the production of the rust primer, and the production efficiency is improved.
Wherein, the preparation of the rust converting agent comprises the following steps:
adding gallic acid and propylene glycol into a reaction vessel according to a predetermined mass ratio;
heating to 70 deg.C under stirring, stirring at a rotation speed of 180rad/min until gallic acid is dissolved;
after the gallic acid is dissolved, adding p-toluenesulfonic acid, heating to 105 ℃, continuing the heat preservation reaction, and naturally cooling after the reaction is completed to obtain the rust converting agent.
The step of preparing the rust converting agent is improved, and the quality of the prepared rust converting agent is improved by adding the reaction raw materials according to the mass ratio.
Wherein the predetermined mass ratio is propylene glycol: the ratio of gallic acid is 1-3: 1.
When the mass ratio of the propylene glycol to the gallic acid is 1-3: 1, the corrosion resistance of the prepared rust converting agent to rust can be improved.
The graphene dispersing agent is MQ-512, the defoaming agent is STA-0517, and the flatting agent is DKX 450.
According to the production process of the water-based epoxy graphene priming paint with rust, the production process and the components of the priming paint with rust are improved on the basis of the prior art, and the graphene is used for replacing part of zinc powder, so that the prepared priming paint with rust can meet the requirement of environmental protection by reducing the quantity of the zinc powder, and the corrosion resistance of steel can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of preparation steps of a production process of a water-based epoxy graphene priming paint with rust provided by the invention.
Fig. 2 is a schematic diagram of a step of preparing a rust conversion agent in the production process of the aqueous epoxy graphene rust primer provided by the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
Referring to fig. 1 and fig. 2, the invention provides a water-based epoxy graphene rusty primer, which is prepared from a component a: the component B comprises the following components in percentage by mass 15: 2, wherein the component A is prepared from the following components in parts by weight:
and the balance water;
the component B comprises the following components in parts by weight:
8-12 parts of an epoxy resin curing agent.
The composition of the priming paint with rust is improved, and the graphene is additionally arranged, so that the use of zinc powder is greatly reduced, the environment-friendly performance is effectively improved on the basis of not reducing the protective capability of the priming paint with rust, and the requirement of green development is met.
Wherein the rust converting agent is made from propylene glycol and gallic acid.
The composition of the rust conversion agent is improved, and the malonic acid and the gallic acid are used for preparing the rust conversion agent so as to improve the conversion capability of the prepared primer with rust on rust.
The invention also provides a production process of the water-based epoxy graphene rusty primer, which is used for preparing the water-based epoxy graphene rusty primer,
the method comprises the following steps:
s101: preparing a rust converting agent and an epoxy resin curing agent for later use;
s102: weighing the epoxy resin emulsion according to parts by weight, and sequentially adding talcum powder, graphene, a graphene dispersing agent, a flatting agent, a defoaming agent and nano silicon dioxide according to parts by weight to prepare a mixed resin liquid;
s103: stirring the mixed resin liquid, and grinding the mixed resin liquid to be less than 50 microns by a grinder to prepare slurry;
s104: adding zinc powder and a rust converting agent into the slurry according to the parts by weight, sieving by a screen, and adding the balance of water to prepare a component A;
s105: and adding an epoxy resin curing agent into the component A to prepare the primer with rust.
The production process of the rust primer is improved corresponding to the change of the rust primer, so that the production process is suitable for the production of the rust primer, and the production efficiency is improved.
Wherein, the preparation of the rust converting agent comprises the following steps:
s201: adding gallic acid and propylene glycol into a reaction vessel according to a predetermined mass ratio;
s202: heating to 70 deg.C under stirring, stirring at a rotation speed of 180rad/min until gallic acid is dissolved;
s203: after the gallic acid is dissolved, adding p-toluenesulfonic acid, heating to 105 ℃, continuing the heat preservation reaction, and naturally cooling after the reaction is completed to obtain the rust converting agent.
The step of preparing the rust converting agent is improved, and the quality of the prepared rust converting agent is improved by adding the reaction raw materials according to the mass ratio.
Wherein the predetermined mass ratio is propylene glycol: the ratio of gallic acid is 1-3: 1.
When the mass ratio of the propylene glycol to the gallic acid is 1-3: 1, the corrosion resistance of the prepared rust conversion agent to rust can be improved.
The graphene dispersing agent is MQ-512, the defoaming agent is STA-0517, and the flatting agent is DKX 450.
Further, the predetermined mass ratio is propylene glycol: the ratio of gallic acid is 3: 1.
Rust converting agent performance test:
with the mass ratio of Propylene Glycol (PG) to Gallic Acid (GA) as N, a pure copper wire was welded on a rusty substrate with an electric iron, treated with the prepared rust conversion agent, dried for 72h and edge-sealed with paraffin wax, leaving a test area of 1cm x 1cm size, and its electrochemical performance in a 3.5 wt% NaCl solution was measured with an LK2005A model electrochemical workstation, see table 1:
TABLE 1
According to the table 1, when N is less than 3, the color depth of the product obtained by the reaction is reduced along with the increase of the N value, and the solid is separated out after the product is placed; when N is increased continuously, the color depth is basically unchanged, and no solid is precipitated after the product is placed. The reason is that when the N value is small, GA does not completely react, excessive GA is etherified at high temperature, the color of the product is deepened, and when the product is placed, the temperature is reduced, the solubility of GA in PG is reduced, and therefore solid is separated out; and when the N value is increased, the GA reaction is relatively complete, no redundant GA exists in the system, and with the continuous increase of PG in the system, the relative content of the rust conversion agent in the system is reduced, the relative content of PG is relatively high, and the color depth of the product is reduced. Therefore, when N is 3:1, the prepared rust conversion agent has better comprehensive effect.
Graphene dosage test:
graphene is added into the prepared priming paint with rust in different addition amounts, namely (0%, 0.2%, 0.5% and 0.8%) in sequence, after the priming paint with rust is sprayed on the upper part of the base material, cross grids are drawn, and a salt spray resistance test is carried out to verify the corrosion resistance of the priming paint with rust, wherein the test results are as shown in the following table 2:
according to the table 2, when the addition amount is 0.5%, graphene has a good protective effect on a substrate, and the specific principle is that the addition of a proper amount of graphene with good conductivity can form an effective micro-conductive circulation path with a small amount of zinc powder under the condition that the content of the zinc powder is greatly reduced, so that smoothness of electron channels of part of isolated zinc powder particles is ensured, and the effect of protecting the substrate by sacrificing an anode is achieved; after excessive graphene is added, the graphene is connected with the sheet, namely the graphene reaches the outermost edge of the coating from the bottom layer without passing through zinc powder particles to form a micro conductive path, and an external corrosive medium can generate oxidation-reduction reaction with the substrate through the graphene conductive path, so that the anticorrosion shielding effect of the coating is lost, and the substrate is corroded in a short time.
Specific example 1:
adding gallic acid and propylene glycol into a reaction vessel according to the ratio of 3: 1; weighing 40 parts of epoxy resin emulsion by weight, and sequentially adding 10 parts of talcum powder, 0.2 part of graphene, 0.1 part of graphene dispersant, 0 part of flatting agent, 0.1 part of defoaming agent and 1 part of nano silicon dioxide by weight to prepare mixed resin liquid;
stirring the mixed resin liquid, and grinding the mixed resin liquid to be less than 50 mu m by a grinder to prepare slurry;
adding 2 parts of zinc powder and 1 part of rust converting agent into the slurry according to parts by weight, sieving by using a screen, adding the balance of water, and adding 8 parts of epoxy resin curing agent to prepare the waterborne epoxy graphene rust primer.
Specific example 2:
adding gallic acid and propylene glycol into a reaction vessel according to the ratio of 1: 1; weighing 46 parts of epoxy resin emulsion by weight, and sequentially adding 20 parts of talcum powder, 0.8 part of graphene, 0.5 part of graphene dispersant, 0.5 part of flatting agent, 0.5 part of defoaming agent and 3 parts of nano silicon dioxide by weight to prepare mixed resin liquid;
stirring the mixed resin liquid, and grinding the mixed resin liquid to be less than 50 microns by a grinder to prepare slurry;
adding 5 parts of zinc powder and 6 parts of rust converting agent into the slurry according to parts by weight, sieving by using a screen, adding the balance of water, and adding 12 parts of epoxy resin curing agent to prepare the waterborne epoxy graphene priming paint with rust.
Specific example 3:
adding gallic acid and propylene glycol into a reaction vessel according to the ratio of 1: 1; weighing 43 parts of epoxy resin emulsion by weight, and sequentially adding 15 parts of talcum powder, 0.5 part of graphene, 0.3 part of graphene dispersant, 0.25 part of flatting agent, 0.3 part of defoaming agent and 2 parts of nano silicon dioxide by weight to prepare mixed resin liquid;
stirring the mixed resin liquid, and grinding the mixed resin liquid to be less than 50 microns by a grinder to prepare slurry;
adding 3.5 parts of zinc powder and 3.5 parts of rust converting agent into the slurry in parts by weight, sieving by using a screen, adding the balance of water, and adding 10 parts of epoxy resin curing agent to prepare the waterborne epoxy graphene rust primer.
According to the production process of the water-based epoxy graphene priming paint with rust, the production process and the composition of the priming paint with rust are improved on the basis of the prior art, and the graphene is used for replacing part of zinc powder, so that the prepared priming paint with rust can meet the requirement of environmental protection by reducing the quantity of the zinc powder, and the corrosion resistance of steel is not reduced.
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 as defined by the appended claims.
Claims (6)
1. A water-based epoxy graphene priming paint with rust is characterized in that,
the aqueous epoxy graphene priming paint with rust comprises a component A: the component B comprises the following components in percentage by mass 15: 2, wherein the component A is prepared from the following components in parts by weight:
and the balance of water;
the component B comprises the following components in parts by weight:
8-12 parts of an epoxy resin curing agent.
2. The aqueous epoxy graphene rusty primer of claim 1,
the rust converting agent is prepared from propylene glycol and gallic acid.
3. A production process of the aqueous epoxy graphene rusty primer for preparing the aqueous epoxy graphene rusty primer according to claim 2,
the method comprises the following steps:
preparing a rust converting agent and an epoxy resin curing agent for later use;
weighing the epoxy resin emulsion according to the weight parts, and sequentially adding talcum powder, graphene, a graphene dispersing agent, a flatting agent, an antifoaming agent and nano-silica according to the weight parts to prepare a mixed resin liquid;
stirring the mixed resin liquid, and grinding the mixed resin liquid to be less than 50 microns by a grinder to prepare slurry;
adding zinc powder and a rust converting agent into the slurry according to the parts by weight, sieving by a screen, and adding the balance of water to prepare a component A;
and adding an epoxy resin curing agent into the component A to prepare the primer with rust.
4. The process for producing the waterborne epoxy graphene rusted primer according to claim 3,
the preparation of the rust converting agent comprises the following steps:
adding gallic acid and propylene glycol into a reaction vessel according to a predetermined mass ratio;
heating to 70 deg.C under stirring, stirring at 180rad/min until gallic acid is dissolved;
after the gallic acid is dissolved, adding p-toluenesulfonic acid, heating to 105 ℃, continuing the heat preservation reaction, and naturally cooling after the reaction is completed to obtain the rust converting agent.
5. The process for producing the aqueous epoxy graphene primer with rust according to claim 4,
the predetermined mass ratio is propylene glycol: the ratio of gallic acid is 1-3: 1.
6. The process for producing the aqueous epoxy graphene primer with rust according to claim 5,
the graphene dispersing agent is MQ-512, the defoaming agent is STA-0517, and the flatting agent is DKX 450.
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| CN202210664862.9A CN114921151A (en) | 2022-06-14 | 2022-06-14 | Production process of water-based epoxy graphene priming paint with rust |
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| CN202210664862.9A CN114921151A (en) | 2022-06-14 | 2022-06-14 | Production process of water-based epoxy graphene priming paint with rust |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116285573A (en) * | 2023-02-27 | 2023-06-23 | 山东建筑大学 | Aqueous epoxy zinc-rich anticorrosive paint capable of being coated with rust and preparation method thereof |
-
2022
- 2022-06-14 CN CN202210664862.9A patent/CN114921151A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116285573A (en) * | 2023-02-27 | 2023-06-23 | 山东建筑大学 | Aqueous epoxy zinc-rich anticorrosive paint capable of being coated with rust and preparation method thereof |
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