CN111040524A - Water-based dip-coated graphene self-drying coating and preparation method thereof - Google Patents
Water-based dip-coated graphene self-drying coating and preparation method thereof Download PDFInfo
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- CN111040524A CN111040524A CN201911320551.5A CN201911320551A CN111040524A CN 111040524 A CN111040524 A CN 111040524A CN 201911320551 A CN201911320551 A CN 201911320551A CN 111040524 A CN111040524 A CN 111040524A
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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
- C09D125/00—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 an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/08—Copolymers of styrene
- C09D125/14—Copolymers of styrene with unsaturated esters
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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
-
- 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
- C09D7/45—Anti-settling agents
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- Chemical & Material Sciences (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based dip-coated graphene self-drying coating and a preparation method thereof. The water-based self-drying coating comprises the following components in percentage by mass: 50-70% of styrene-acrylic emulsion, 2-10% of film-forming additive, 0-1% of defoaming agent, 0-1% of flatting agent, 0-1% of dispersing agent, 1-5% of graphene, 0.5-3% of liquid antirust pigment, 0-2% of flash rust resistant agent, 0-2% of thickening agent and the balance of water. The water-based dip-coating graphene self-drying coating improves the anti-settling performance of the dip-coating in a low-viscosity state; the corrosion resistance of the paint film is improved, and the paint film dried at normal temperature or forcibly dried at low temperature is used, and the neutral salt spray test can reach more than 200h at the thickness of 20-30 mu m; meanwhile, the hardness and scratch resistance of a paint film are improved, the pencil hardness reaches above F, and the scratch resistance is obviously improved. Therefore, the water-based self-drying coating for dip-coating graphene provided by the invention has important application value.
Description
Technical Field
The invention belongs to the technical field of chemical water-based paint, and particularly relates to water-based dip-coated graphene self-drying paint and a preparation method thereof.
Background
The coating is traditionally named as paint in China. The coating is a continuous film which is coated on the surface of an object to be protected or decorated and can form firm adhesion with the object to be coated, and is a viscous liquid which is prepared by taking resin, oil or emulsion as a main material, adding or not adding pigments and fillers, adding corresponding auxiliaries and using an organic solvent or water.
With the implementation of the national environmental protection policy, the national provinces and cities have given out the VOC emission limit and charge standard, the paint industry and the coating process begin to develop towards low pollution, and the water-based paint is increasingly rising. The use of the water-based paint reduces the pollution of organic solvent to the environment, ensures the health of operators, and has wide favor on safe and environment-friendly production and transportation methods.
Although the water-based paint is superior to the solvent-based paint in environmental protection performance, the water-based paint has the defects of low hardness, easy scratch and the like in physical performance, and the water-based anticorrosive paint sold in the market at present hardly competes with the solvent-based paint in anticorrosive performance. Only if the defects of the physical properties of the water-based paint are overcome, even surpassing solvent-based paint, consumers can more actively select the water-based paint. Meanwhile, the current commercially available water-based anticorrosive coating is difficult to compete with a solvent-based coating in terms of anticorrosive performance, has poor water resistance and salt spray resistance less than half of that of the solvent-based coating, and severely limits the development of the water-based coating.
The graphene serving as a single-layer sheet-shaped two-dimensional nanomaterial made of carbon atoms has excellent mechanical properties, transparency, flexibility, hydrophobicity, chemical stability, thermal conductivity and electron mobility, and a sheet structure can effectively block oxygen, water, ions and electrons from passing through and has excellent blocking performance. In recent years, the coating has attracted much attention in the field of organic corrosion protective coatings.
Therefore, the water-based dip-coating graphene self-drying coating and the preparation method thereof are necessary.
Disclosure of Invention
The invention aims to provide a water-based dip-coated graphene self-drying coating and a preparation method thereof, which not only have the anti-settling performance in a low-viscosity state, but also have excellent corrosion resistance, high hardness and scratch resistance.
The invention firstly protects a water-based self-drying paint for dip-coating graphene, which comprises the following components in percentage by mass: 50-70% of styrene-acrylic emulsion, 2-10% of film-forming additive, 0-1% of defoaming agent, 0-1% of flatting agent, 0-1% of dispersing agent, 1-5% of graphene, 0.5-3% of liquid antirust pigment, 0-2% of flash rust resistant agent, 0-2% of thickening agent and the balance of water.
The water-based self-drying coating comprises the following specific components in percentage by mass: 66.0% of styrene-acrylic emulsion, 6.8% of film-forming additive, 0.5% of defoaming agent, 0.7% of flatting agent, 0.4% of dispersing agent, 2.8% of graphene, 0.8% of liquid antirust pigment, 1.7% of flash rust inhibitor, 0.8% of thickening agent and 19.5% of water.
The particle diameter of the styrene-acrylic emulsion is less than 200 nm.
The particle diameter of the styrene-acrylic emulsion can be 180 nm.
The film-forming assistant is alcohol ester dodeca or alcohol ether solvent.
The defoaming agent is one or a mixture of several of polysiloxane defoaming agent, polyether defoaming agent and polyether modified polysiloxane defoaming agent.
The defoaming agent can be a polyether defoaming agent.
The flatting agent is one or a mixture of more of an acrylic flatting agent, an organic silicon flatting agent and a fluorocarbon flatting agent.
The leveling agent can be a fluorocarbon leveling agent.
The dispersing agent is an unsaturated polycarboxylic acid polymer or a modified acrylic acid block copolymer.
The dispersant may specifically be a modified acrylic block copolymer.
The thickness of the graphene is 6-8nm, and the particle diameter is 2-8 microns.
The thickness of the graphene may be 7nm, and the particle diameter is 5 μm.
The liquid antirust pigment is an epoxy silane modified pigment.
The flash rust inhibitor is an alkynol-based water-based metal slow-release flash rust inhibitor.
The thickening agent is one or a mixture of several of polyurethane thickening agents, polyoxyethylene thickening agents and polyacrylic thickening agents.
The thickener can be a polyurethane thickener.
The invention also discloses a preparation method of the water-based dip-coated graphene self-drying coating, which comprises the following steps: (1) premixing any one of the dispersant, the defoaming agent and the film-forming additive with water, and then adding graphene for high-speed dispersion pulping; (2) grinding the slurry obtained in the step (1) to the fineness of below 15 mu m by a sand mill; (3) and (3) adding the slurry obtained in the step (2) and other additives into the styrene-acrylic emulsion under the stirring state to adjust the mixture into a finished coating.
The method for preparing the water-based self-drying dip-coating graphene coating further comprises drying the finished coating at normal temperature or forcibly drying the finished coating at low temperature to obtain the water-based self-drying dip-coating graphene coating.
The invention also protects the application of any one of the water-based dip-coated graphene self-drying coating in preparing a graphene self-drying coating product.
On the basis of the common general knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily without departing from the concept and the protection scope of the invention.
Compared with the prior art, the invention has the following remarkable advantages and effects: the water-based dip-coating graphene self-drying coating prepared by the invention improves the anti-settling performance of the dip-coating in a low-viscosity state; the corrosion resistance of the paint film is improved, and the paint film dried at normal temperature or forcibly dried at low temperature is used, and the neutral salt spray test can reach more than 200h at the thickness of 20-30 mu m; meanwhile, the hardness and scratch resistance of a paint film are improved, the pencil hardness reaches above F, and the scratch resistance is obviously improved. Therefore, the water-based self-drying coating for dip-coating graphene provided by the invention has important application value.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to examples, but the present invention is not limited to the scope of the examples.
The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions. The reagents and starting materials used in the present invention are commercially available.
Example 1
The water-based self-drying paint for dip-coating graphene comprises the following components in percentage by mass: 56.5 percent of styrene-acrylic emulsion, 9.5 percent of alcohol ether film-forming assistant, 1.0 percent of polysiloxane defoamer, 1.0 percent of acrylic flatting agent, 1.0 percent of unsaturated polycarboxylic acid polymer, 5.0 percent of graphene, 2.0 percent of epoxy silane modified pigment, 2.0 percent of alkynol aqueous metal slow-release flash rust inhibitor, 2.0 percent of polyacrylic thickener and 20.0 percent of water.
A preparation method of a water-based dip-coated graphene self-drying coating comprises the following steps:
(1) premixing unsaturated polycarboxylic acid polymer, polysiloxane defoaming agent, alcohol ether film-forming assistant and water, and then adding graphene for high-speed dispersion pulping;
(2) grinding the slurry obtained in the step (1) to the fineness of below 15 mu m by a sand mill;
(3) and (3) adding the slurry obtained in the step (2) and other additives into the styrene-acrylic emulsion under the stirring state to adjust the mixture into a finished coating.
With the above in mind: and drying the finished coating at normal temperature to obtain the water-based dip-coating graphene self-drying coating.
Comparative example 1
In the preparation process of the coating of example 1, water is used to replace graphene, and the water-based dip-coating graphene self-drying coating is obtained under the same drying condition.
Example 2
The water-based self-drying paint for dip-coating graphene comprises the following components in percentage by mass: 66.0 percent of styrene-acrylic emulsion, 6.8 percent of alcohol ester dodecafilming aid, 0.5 percent of polyether defoamer, 0.7 percent of fluorocarbon leveling agent, 0.4 percent of modified acrylic block copolymer, 2.8 percent of graphene, 0.8 percent of epoxy silane modified pigment, 1.7 percent of alkynol aqueous metal slow-release flash rust inhibitor, 0.8 percent of polyurethane thickener and 19.5 percent of water.
A preparation method of a water-based dip-coated graphene self-drying coating comprises the following steps:
(1) premixing the modified acrylic block copolymer, the polyether defoaming agent and the alcohol ester dodecafilming aid with water, and then adding graphene for high-speed dispersion pulping;
(2) grinding the slurry obtained in the step (1) to the fineness of below 15 mu m by a sand mill;
(3) and (3) adding the slurry obtained in the step (2) and other additives into the styrene-acrylic emulsion under the stirring state to adjust the mixture into a finished coating.
With the above in mind: and drying the finished coating at normal temperature to obtain the water-based dip-coating graphene self-drying coating.
Comparative example 2
In the preparation process of the coating of example 2, water is used to replace graphene, and the water-based dip-coating graphene self-drying coating is obtained under the same drying condition.
Example 3
The water-based self-drying paint for dip-coating graphene comprises the following components in percentage by mass: 70.0 percent of styrene-acrylic emulsion, 2.2 percent of alcohol ether film-forming assistant, 0.4 percent of polyether modified polysiloxane antifoaming agent, 0.5 percent of organic silicon flatting agent, 0.8 percent of modified acrylic block copolymer, 4.0 percent of graphene, 2.5 percent of epoxy silane modified pigment, 0.9 percent of alkynol aqueous metal slow-release flash rust inhibitor, 1.5 percent of polyoxyethylene thickening agent and 17.2 percent of water.
A preparation method of a water-based dip-coated graphene self-drying coating comprises the following steps:
(1) premixing the modified acrylic block copolymer, the polyether modified polysiloxane defoaming agent and the alcohol ether film-forming aid with water, and then adding graphene for high-speed dispersion pulping;
(2) grinding the slurry obtained in the step (1) to the fineness of below 15 mu m by a sand mill;
(3) and (3) adding the slurry obtained in the step (2) and other additives into the styrene-acrylic emulsion under the stirring state to adjust the mixture into a finished coating.
With the above in mind: and drying the finished coating at normal temperature to obtain the water-based dip-coating graphene self-drying coating.
Comparative example 3
In the preparation process of the coating of the example 3, water is used for replacing graphene, and the water-based dip-coating graphene self-drying coating is obtained under the same drying condition.
Example 4
The performance test comprises a settlement resistance test, an anti-corrosion test and a hardness test, which are all common test methods.
The anti-settling test method comprises the following steps: the sedimentation time of the dope was examined in a state of a viscosity of 30s in a Zahn #2 cup.
The corrosion resistance test method comprises the following steps: and detecting the thickness of the paint film at 20-30 mu m and the duration of a neutral salt spray test.
Table 1 shows the results of the performance tests of examples 1 to 3 and comparative examples 1 to 3.
TABLE 1
Compared with the performance test results of the comparative examples and the examples in table 1, it can be seen that after the graphene is added to the water-based self-drying coating, the physical properties of the water-based self-drying coating, such as sedimentation resistance, corrosion resistance, hardness and the like, are remarkably improved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The water-based dip-coating graphene self-drying coating is characterized by comprising the following components in parts by weight: the water-based self-drying coating comprises the following components in percentage by mass: 50-70% of styrene-acrylic emulsion, 2-10% of film-forming additive, 0-1% of defoaming agent, 0-1% of flatting agent, 0-1% of dispersing agent, 1-5% of graphene, 0.5-3% of liquid antirust pigment, 0-2% of flash rust resistant agent, 0-2% of thickening agent and the balance of water.
2. The water-based self-drying paint as claimed in claim 1, wherein: the particle diameter of the styrene-acrylic emulsion is less than 200 nm.
3. The water-based self-drying paint as claimed in claim 1, wherein: the film-forming assistant is alcohol ester dodeca or alcohol ether solvent.
4. The water-based self-drying paint as claimed in claim 1, wherein: the defoaming agent is one or a mixture of several of polysiloxane defoaming agent, polyether defoaming agent and polyether modified polysiloxane defoaming agent; and/or the flatting agent is one or a mixture of more of an acrylic flatting agent, an organic silicon flatting agent and a fluorocarbon flatting agent.
5. The water-based self-drying paint as claimed in claim 1, wherein: the dispersing agent is an unsaturated polycarboxylic acid polymer or a modified acrylic acid block copolymer.
6. The water-based self-drying paint as claimed in claim 1, wherein: the thickness of the graphene is 6-8nm, and the particle diameter is 2-8 microns.
7. The water-based self-drying paint as claimed in claim 1, wherein: the liquid antirust pigment is an epoxy silane modified pigment; and/or the flash rust inhibitor is an alkynol-based aqueous metal slow-release flash rust inhibitor; and/or the thickening agent is one or a mixture of a plurality of polyurethane thickening agents, polyoxyethylene thickening agents and polyacrylic acid thickening agents.
8. A preparation method of a water-based dip-coated graphene self-drying coating comprises the following steps: (1) premixing the dispersant, the defoamer and the film-forming additive of any one of claims 1 to 7 with water, and then adding graphene for high-speed dispersion pulping; (2) grinding the slurry obtained in the step (1) to the fineness of below 15 mu m by a sand mill; (3) and (3) adding the slurry obtained in the step (2) and other additives into the styrene-acrylic emulsion under the stirring state to adjust the mixture into a finished coating.
9. The method according to claim 8, wherein the finished coating is dried at normal temperature or forced dried at low temperature.
10. Use of the aqueous dip-coated graphene self-drying coating of any one of claims 1 to 7 in the preparation of a graphene self-drying coating product.
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| US20190112435A1 (en) * | 2017-10-12 | 2019-04-18 | Miwon North America Incorporated | Acrylic Emulsions Modified with Functional (Meth)acrylates to Enable Crosslinking |
| CN109943128A (en) * | 2019-04-04 | 2019-06-28 | 苏州格瑞丰纳米科技有限公司 | A kind of thin graphene aqueous slurry, preparation method and application |
-
2019
- 2019-12-19 CN CN201911320551.5A patent/CN111040524A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101284017B1 (en) * | 2013-01-08 | 2013-07-17 | 박동배 | A manufacturing method of display equipment roller shaft in antistatic coating |
| CN107964340A (en) * | 2017-09-30 | 2018-04-27 | 石家庄市油漆厂 | Water-based amino industrial coating and preparation method thereof |
| US20190112435A1 (en) * | 2017-10-12 | 2019-04-18 | Miwon North America Incorporated | Acrylic Emulsions Modified with Functional (Meth)acrylates to Enable Crosslinking |
| CN108531006A (en) * | 2018-04-19 | 2018-09-14 | 多凌新材料科技股份有限公司 | The waterborne anti-corrosive primer and preparation method thereof of graphene enhancing |
| CN109608948A (en) * | 2018-11-23 | 2019-04-12 | 河北嘉宝莉涂料有限公司 | Wall primer and preparation method thereof in a kind of high covering power high closeness |
| CN109943128A (en) * | 2019-04-04 | 2019-06-28 | 苏州格瑞丰纳米科技有限公司 | A kind of thin graphene aqueous slurry, preparation method and application |
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Application publication date: 20200421 |