CN110845960A - Anti-doodling coating structure and preparation method thereof - Google Patents

Anti-doodling coating structure and preparation method thereof Download PDF

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Publication number
CN110845960A
CN110845960A CN201911206649.8A CN201911206649A CN110845960A CN 110845960 A CN110845960 A CN 110845960A CN 201911206649 A CN201911206649 A CN 201911206649A CN 110845960 A CN110845960 A CN 110845960A
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doodling
layer
coating structure
coating
adhesive
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叶向东
侯俊文
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Xian University of Architecture and Technology
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Xian University of Architecture and Technology
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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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • 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
    • 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
    • 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
    • C09D7/65—Additives macromolecular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2503/00—Polyurethanes
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses an anti-doodling paintThe layer structure comprises a bonding layer and an anti-doodling layer, wherein the bonding layer is coated on the surface of a base material layer, and the anti-doodling layer is coated on the surface of the bonding layer; the anti-doodling layer comprises nano SiO2: 0.01-0.50g, toluene: 0.5-20mL, micron ptfe particles: 0.05-2g, PDMS: 1-2g, curing agent: 0.1-0.2g and perfluorodecyltrimethoxysilane: 0.5-2 mL; according to the invention, the bonding layer is arranged between the anti-doodling layer and the base material layer, the isolation is arranged between the anti-doodling layer and the base material layer, and the nano SiO is adopted in the anti-doodling layer2And the two micron ptfe particles can form a micro-nano composite structure, so that the bonding performance between the anti-doodling layer and the substrate layer is effectively improved, and the micro-nano composite structure has a three-dimensional space structure, so that the surface energy of the anti-doodling layer is greatly reduced, the influence of weather is reduced, and the weather resistance is better. The anti-doodling layer disclosed by the invention can be suitable for different base materials, is wide in application range and has good adhesiveness with various base materials.

Description

Anti-doodling coating structure and preparation method thereof
Technical Field
The invention belongs to the technical field of micro-nano processing, and particularly relates to an anti-doodling coating structure and a preparation method thereof.
Background
The anti-doodling coating has the water and oil repellent effect, can prevent the coating from being adhered with water or oil stains, and keeps self-cleaning; the existing anti-doodling coating structure preparation method is complex; the anti-doodling layer and the bonding layer have poor bonding performance, are easy to fall off and lose effectiveness in the actual use process, and lose the anti-doodling function; meanwhile, the anti-doodling coating is easily interfered by weather and is easily failed after being exposed outdoors for a long time or interfered by weather.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an anti-doodling coating structure and a preparation method thereof, and aims to solve the technical problems that an anti-doodling layer in the anti-doodling coating structure in the prior art is easy to fall off and lose effectiveness due to weather interference, and the preparation method is complex.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides an anti-doodling coating structure which comprises a bonding layer and an anti-doodling layer, wherein the bonding layer is coated on the surface of a base material layer, and the anti-doodling layer is coated on the surface of the bonding layer; the anti-doodling layer comprises nano SiO2: 0.01-0.50g, toluene: 0.5-20mL, micron ptfe particles: 0.05-2g, PDMS: 1-2g, curing agent: 0.1-0.2g and perfluorodecyltrimethoxysilane: 0.5-2 mL.
Further, nano SiO2The grain diameter of the particle is 16-25nm, and the grain diameter of the micron ptfe particle is 5-50 μm.
Further, the PDMS is Dow Corning 184 PDMS; the curing agent adopts Dow Corning 184PDMS corresponding to the curing agent.
Further, the substrate layer is any one of paper, metal, plastic material, wood and plastic.
Furthermore, the bonding layer is formed by coating an adhesive, and the adhesive is made of polyurethane.
The invention also provides a preparation method of the anti-doodling coating structure, which comprises the following steps:
step 1, coating the adhesive on a substrate layer, and performing semi-curing treatment to obtain an adhesive layer;
step 2, preparing an anti-doodling layer mixture;
and 3, coating the anti-doodling layer mixture on the surface of the semi-solidified bonding layer to form an anti-doodling layer, and solidifying to obtain the anti-doodling coating structure.
Further, in the step 1, spraying the adhesive on the surface of the substrate layer by adopting a spraying process; the spraying process adopts an air pressure spray gun for spraying, and the spraying air pressure is 3-5 MPa; the semi-solidification treatment is carried out by standing at normal temperature for 8-24h or heating at 40-80 deg.C for 20min-2 h.
Further, in the step 2, when preparing the anti-doodling coating mixture, the method specifically comprises the following steps:
step 1, mixing nano SiO2Adding the mixture into a toluene reagent, magnetically stirring the mixture until no obvious white particles exist to obtain a component I;
step 2, adding the micron ptfe particles into the component I, and stirring to obtain a uniform dispersion liquid;
step 3, adding PDMS and a curing agent into the uniform dispersion liquid obtained in the step 2, stirring by magnetic force until the solution is uniform and clear, and obtaining a component II;
and 4, adding perfluorodecyl trimethoxy silane into the component II, magnetically stirring, and stirring until the solution is not obviously layered to obtain the anti-doodling coating mixture.
Further, in the step 3, the curing process is carried out for 24-72 hours at normal temperature.
Further, in the step 3, in the curing process, heating is carried out for 1-2 hours at the temperature of 40-80 ℃.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an anti-doodling coating structure, which effectively enhances the bonding performance between an anti-doodling layer and a base material layer by adding a bonding layer between the base material layer and the anti-doodling layer; meanwhile, the anti-doodling layer adopts nano SiO2The two micron ptfe particles can form a micro-nano composite structure, so that the bonding performance between the anti-doodling layer and the substrate layer is effectively improved, the surface energy of the micro-nano composite structure is greatly reduced due to the fact that the micro-nano composite structure has a three-dimensional space structure, the adhesive force of printing ink, dye, colored stains and the like can be reduced, the anti-doodling effect is effectively improved, and the falling failure of the anti-doodling layer is avoided; according to the invention, the bonding layer is arranged between the anti-doodling layer and the base material layer, and the isolation is arranged between the anti-doodling layer and the base material layer, so that the influence of weather is reduced, and the weather resistance is better.
The invention also provides a preparation method of the anti-doodling coating structure, the bonding layer is coated on the substrate layer by spraying or directly coating by hands, and the anti-doodling layer is coated on the bonding layer by spraying or directly coating by hands, so that the preparation method is simple; the anti-doodling layer disclosed by the invention can be suitable for different base materials, is wide in application range and has good adhesiveness with the base materials.
Drawings
FIG. 1 is a schematic overall structure diagram of an anti-doodling coating structure according to the invention;
FIG. 2 is a schematic view of a manufacturing process of the anti-doodling coating structure according to the present invention.
Wherein, 1 tie coat, 2 anti-graffiti layers, 3 substrate layers.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in the attached figure 1, the invention provides an anti-doodling coating structure, which comprises a bonding layer 1 and an anti-doodling layer 2, wherein the bonding layer 1 is sprayed or directly coated on the surface of a base material layer 3, and the anti-doodling layer 2 is sprayed or directly coated on the surface of the bonding layer 1; anti-doodling layer 2, bagComprises nano SiO2: 0.01-0.50g, toluene: 0.5-20mL, micron ptfe particles: 0.05-2g, PDMS: 1-2g, curing agent: 0.1-0.2g and perfluorodecyltrimethoxysilane: 0.5-2 mL; wherein the nano SiO2The diameter is 16-25 nm; the particle size of the micron ptfe particles is 5-50 μm; the PDMS is Dow Corning 184PDMS, and the curing agent is Dow Corning 184PDMS corresponding to the curing agent; the substrate layer 3 is any one of paper, metal, plastic material, wood and plastic; the adhesive layer 1 is formed by coating an adhesive on the adhesive layer 1, and the adhesive is polyurethane.
As shown in fig. 2, the invention also provides a preparation method of the anti-doodling coating structure, which comprises the following steps:
step 1, spraying or directly coating the adhesive on a substrate layer 3 by hands, and performing semi-curing treatment to obtain an adhesive layer 1;
when the spraying process is adopted, the adhesive is sprayed on the surface of the substrate layer 3; the spraying process adopts an air pressure spray gun for spraying, and the spraying air pressure is 3-5 MPa; the semi-solidification treatment is carried out by standing at normal temperature for 8-24h or heating at 40-80 deg.C for 20min-2 h;
step 2, preparing an anti-doodling layer mixture; specifically, the method comprises the following steps:
step 21, mixing the nano SiO2Adding the mixture into a toluene reagent, magnetically stirring the mixture until no obvious white particles exist to obtain a component I;
step 22, adding the micron ptfe particles into the component I, and stirring to obtain a uniform dispersion liquid;
step 23, adding PDMS and a curing agent into the uniform dispersion liquid obtained in the step 22, stirring by magnetic force until the solution is uniform and clear, and obtaining a component II;
and 24, adding perfluorodecyl trimethoxy silane into the component II, magnetically stirring, and stirring until the solution is not obviously layered to obtain the anti-doodling coating mixture.
Step 3, coating the anti-doodling layer mixture on the surface of the semi-solidified bonding layer 1 to form an anti-doodling layer 2, and solidifying to obtain the anti-doodling coating structure; wherein the curing process adopts standing at normal temperature for 24-72h or heating at 40-80 ℃ for 1-2 h.
Example 1
The invention relates to a preparation method of an anti-doodling coating structure, which comprises the following steps:
step 1, coating polyurethane on the surface of paper, and heating the substrate layer 3 coated with the polyurethane for 2 hours at normal temperature for 8-24 hours or 40 ℃ to obtain a semi-cured adhesive layer 1;
step 2, preparing an anti-doodling layer mixture;
specifically, the method comprises the following steps:
s21, mixing 0.01g of nano SiO2Adding the mixture into 10mL of methylbenzene, magnetically stirring the mixture for 20min at the stirring speed of 200r/min until no obvious white particles exist and the solution is uniformly dispersed to obtain a component I; wherein, the nano SiO2The particle size of (A) is 16-25 nm;
s22, adding 0.05g of micron ptfe particles into the component I, and stirring for 20min at the stirring speed of 300r/min to obtain a uniform dispersion liquid; wherein the particle size of the micron ptfe particles is 5-50 μm;
s23, adding 1g of PDMS and 0.1g of corresponding curing agent into the uniform dispersion liquid in the step 2, magnetically stirring for 20min at a stirring speed of 200r/min until the solution becomes uniform and clear and is not viscous any more, and obtaining a component II;
s24, adding 1mL of perfluorodecyl trimethoxy silane into the second component, magnetically stirring for 20min at the stirring speed of 200r/min until the solution is not obviously layered and uniform, and obtaining the anti-doodling coating mixture.
Step 3, coating the anti-doodling layer mixture on the surface of the bonding layer 2 to form an anti-doodling layer, and curing to obtain the anti-doodling coating structure; and in the fixing process, the base material layer 3 and the surface coating are kept stand for 24-72 hours at normal temperature for curing treatment.
Prevent scribble layer structure of scribbling of preparation in embodiment 1 has water-proof effects and prevents the scribble effect, and its transparency is good and intensity is higher, places more than half a year in practical application outdoor and does not appear droing, prevents that the scribble effect is better.
Example 2
The invention relates to a preparation method of an anti-doodling coating structure, which comprises the following steps:
step 1, coating polyurethane on the surface of metal, and heating the paper coated with the polyurethane for 1 hour at the temperature of 60 ℃ or standing for 8-24 hours at normal temperature to obtain a semi-cured adhesive layer 1;
step 2, preparing an anti-doodling layer mixture;
specifically, the method comprises the following steps:
s21, mixing 0.2g of nano SiO2Adding the mixture into 15mL of methylbenzene, magnetically stirring the mixture for 15min at the stirring speed of 300r/min until no obvious white particles exist and the solution is uniformly dispersed to obtain a component I; wherein, the nano SiO2The particle size of (A) is 16-25 nm;
s22, adding 0.5g of micron ptfe particles into the component I, and stirring for 25min at the stirring speed of 180r/min to obtain a uniform dispersion liquid; wherein the particle size of the micron ptfe particles is 5-50 μm;
s23, adding 1.5g of PDMS and 0.15g of corresponding curing agent into the uniform dispersion liquid in the step 2, magnetically stirring for 15min at a stirring speed of 280r/min until the solution becomes uniform and clear and is not viscous any more, and obtaining a component II;
s24, adding 1.5mL of perfluorodecyl trimethoxy silane into the second component, magnetically stirring for 25min at the stirring speed of 150r/min until the solution is not obviously layered and uniform, and obtaining the anti-doodling coating mixture.
Step 3, coating the anti-doodling layer mixture on the surface of the bonding layer 2 to form an anti-doodling layer, and curing to obtain the anti-doodling coating structure; and in the fixing process, the substrate layer 3 and the surface coating are heated for 2 hours at 40 ℃ or are kept stand for 24-72 hours at normal temperature for curing treatment.
The anti-doodling coating structure manufactured according to the embodiment 2 has a waterproof effect, an anti-doodling effect, transparency and high strength. Compared with the prior art, the method solves the problem that the preparation method of the anti-doodling coating is complex; the anti-doodling coating structure manufactured in the embodiment 2 solves the problems that most of the existing anti-doodling coatings are poor in adhesion, and cannot fall off after being placed outdoors for more than half a year in practical application; compared with the existing anti-doodling coating which cannot withstand the interference of weather, the anti-doodling coating can maintain the anti-doodling effect even if placed outdoors for more than half a year in outdoor long-time practical application.
Example 3
The invention relates to a preparation method of an anti-doodling coating structure, which comprises the following steps:
step 1, coating polyurethane on the surface of a plastic material, and heating the plastic material coated with the polyurethane at 80 ℃ for 20min to obtain a semi-cured adhesive layer 1;
step 2, preparing an anti-doodling layer mixture;
specifically, the method comprises the following steps:
s21, mixing 0.5g of nano SiO2Adding the mixture into 20mL of methylbenzene, magnetically stirring the mixture for 30min at the stirring speed of 150r/min until no obvious white particles exist and the solution is uniformly dispersed to obtain a component I;
s22, adding 2g of micron ptfe particles into the component I, and stirring for 25min at the stirring speed of 250r/min to obtain a uniform dispersion liquid;
s23, adding 2g of PDMS and 0.2g of corresponding curing agent into the uniform dispersion liquid in the step 2, magnetically stirring for 30min at a stirring speed of 150r/min until the solution becomes uniform and clear and is not viscous any more, and obtaining a component II;
s24, adding 2mL of perfluorodecyl trimethoxy silane into the component II, magnetically stirring for 25min at the stirring speed of 210r/min until the solution is not obviously layered and uniform, and obtaining the anti-doodling coating mixture.
Step 3, coating the anti-doodling layer mixture on the surface of the bonding layer 2 to form an anti-doodling layer, and curing to obtain the anti-doodling coating structure; and in the fixing process, the plastic material and the surface coating are subjected to standing 24-72 at normal temperature for curing treatment.
The anti-doodling coating structure manufactured according to the embodiment 3 has a waterproof effect, an anti-doodling effect, transparency and high strength. Compared with the prior art, the method solves the problem that the preparation method of the anti-doodling coating is complex; the anti-doodling coating structure manufactured in the embodiment 3 solves the problems that most of the existing anti-doodling coatings are poor in adhesion, and cannot fall off after being placed outdoors for more than half a year in practical application; compared with the existing anti-doodling coating which cannot withstand the interference of weather, the anti-doodling coating can maintain the anti-doodling effect even if placed outdoors for more than half a year in outdoor long-time practical application.
Example 4
The invention relates to a preparation method of an anti-doodling coating structure, which comprises the following steps:
step 1, coating polyurethane on the surface of wood, and heating the plastic material coated with the polyurethane at 80 ℃ for 1h to obtain a semi-cured adhesive layer 1;
step 2, preparing an anti-doodling layer mixture;
specifically, the method comprises the following steps:
s21, mixing 0.3g of nano SiO2Adding the mixture into 20mL of methylbenzene, magnetically stirring the mixture for 25min at the stirring speed of 200r/min until no obvious white particles exist and the solution is uniformly dispersed to obtain a component I;
s22, adding 1.5g of micron ptfe particles into the component I, and stirring for 15min at the stirring speed of 300r/min to obtain a uniform dispersion liquid;
s23, adding 1.5g of PDMS and 0.15g of corresponding curing agent into the uniform dispersion liquid in the step 2, magnetically stirring for 15min at a stirring speed of 300r/min until the solution becomes uniform and clear and is not viscous any more, and obtaining a component II;
s24, adding 2mL of perfluorodecyl trimethoxy silane into the component II, magnetically stirring for 20min at the stirring speed of 200r/min until the solution is not obviously layered and uniform, and obtaining the anti-doodling coating mixture.
Step 3, coating the anti-doodling layer mixture on the surface of the bonding layer 2 to form an anti-doodling layer, and curing to obtain the anti-doodling coating structure; the fixing process is that the wood and the surface coating are heated for 1 hour at the temperature of 80 ℃ for curing treatment.
The anti-doodling coating structure manufactured according to the embodiment 4 has a waterproof effect, an anti-doodling effect, transparency and high strength. Compared with the prior art, the method solves the problem that the preparation method of the anti-doodling coating is complex; the anti-doodling coating structure manufactured in the embodiment 4 solves the problems that most of the existing anti-doodling coatings are poor in adhesion, and cannot fall off after being placed outdoors for more than half a year in practical application; compared with the existing anti-doodling coating which cannot withstand the interference of weather, the anti-doodling coating can maintain the anti-doodling effect even if placed outdoors for more than half a year in outdoor long-time practical application.
Example 5
The invention relates to a preparation method of an anti-doodling coating structure, which comprises the following steps:
step 1, coating polyurethane on the surface of plastic, and heating the plastic material coated with the polyurethane at 60 ℃ for 1h to obtain a semi-cured adhesive layer 1;
step 2, preparing an anti-doodling layer mixture;
specifically, the method comprises the following steps:
s21, mixing 0.4g of nano SiO2Adding the mixture into 18mL of methylbenzene, magnetically stirring the mixture for 20min at the stirring speed of 200r/min until no obvious white particles exist and the solution is uniformly dispersed to obtain a component I;
s22, adding 1.3g of micron ptfe particles into the component I, and stirring for 30min at the stirring speed of 150r/min to obtain a uniform dispersion liquid;
s23, adding 2g of PDMS and 0.2g of corresponding curing agent into the uniform dispersion liquid in the step 2, magnetically stirring for 15min at a stirring speed of 300r/min until the solution becomes uniform and clear and is not viscous any more, and obtaining a component II;
s24, adding 1.8mL of perfluorodecyl trimethoxy silane into the component II, magnetically stirring for 17min at the stirring speed of 250r/min until the solution is not obviously layered and uniform, and obtaining the anti-doodling coating mixture.
Step 3, coating the anti-doodling layer mixture on the surface of the bonding layer 2 to form an anti-doodling layer, and curing to obtain the anti-doodling coating structure; the fixing process comprises the step of standing the plastic material and the surface coating for 24-72 hours at normal temperature or heating for 1 hour at 60 ℃ for curing treatment.
The anti-doodling coating structure manufactured according to the embodiment 5 has a waterproof effect, an anti-doodling effect, transparency and high strength. Compared with the prior art, the method solves the problem that the preparation method of the anti-doodling coating is complex; the anti-doodling coating structure manufactured in the embodiment 5 solves the problems that most of the existing anti-doodling coatings are poor in adhesion, and cannot fall off after being placed outdoors for more than half a year in practical application; compared with the existing anti-doodling coating which cannot withstand the interference of weather, the anti-doodling coating can maintain the anti-doodling effect even if placed outdoors for more than half a year in outdoor long-time practical application.
The above description is only illustrative of the preferred embodiments of the present invention, and any structural changes, improvements, modifications, etc. made without departing from the principle of the present invention are deemed to be within the scope of the present invention.

Claims (10)

1. The anti-doodling coating structure is characterized by comprising a bonding layer (1) and an anti-doodling layer (2), wherein the bonding layer (1) is coated on the surface of a base material layer (3), and the anti-doodling layer (2) is coated on the surface of the bonding layer (1); the anti-doodling layer (2) comprises nano SiO2: 0.01-0.50g, toluene: 0.5-20mL, micron ptfe particles: 0.05-2g, PDMS: 1-2g, curing agent: 0.1-0.2g and perfluorodecyltrimethoxysilane: 0.5-2 mL.
2. The anti-doodling coating structure as claimed in claim 1, wherein the nano-SiO is2The grain diameter of the particle is 16-25nm, and the grain diameter of the micron ptfe particle is 5-50 μm.
3. The anti-doodling coating structure as claimed in claim 1, wherein the PDMS is selected from the group consisting of dow corning 184 PDMS; the curing agent adopts Dow Corning 184PDMS corresponding to the curing agent.
4. An anti-graffiti coating structure as claimed in claim 1, wherein the substrate layer (3) is any one of paper, metal, plastic material, wood and plastic.
5. The anti-doodling coating structure as claimed in claim 1, wherein the adhesive layer (1) is formed by coating an adhesive, and the adhesive is made of polyurethane.
6. Method for producing an anti-graffiti coating structure according to any one of claims 1 to 5, characterized in that it comprises the following steps:
step 1, coating the adhesive on a substrate layer (3), and performing semi-curing treatment to obtain an adhesive layer (1);
step 2, preparing an anti-doodling layer mixture;
and 3, coating the anti-doodling layer mixture on the surface of the semi-solidified bonding layer (1) to form an anti-doodling layer (2), and solidifying to obtain the anti-doodling coating structure.
7. The preparation method of the anti-doodling coating structure as claimed in claim 6, characterized in that in step 1, the adhesive is sprayed on the surface of the substrate layer (3) by a spraying process; the spraying process adopts an air pressure spray gun for spraying, and the spraying air pressure is 3-5 MPa; the semi-solidification treatment is carried out by standing at normal temperature for 8-24h or heating at 40-80 deg.C for 20min-2 h.
8. The method for preparing an anti-doodling coating structure according to claim 6, wherein the step 2 comprises the following steps:
step 1, mixing nano SiO2Adding into toluene reagent, magnetically stirringStirring until no obvious white particles exist to obtain a component I;
step 2, adding the micron ptfe particles into the component I, and stirring to obtain a uniform dispersion liquid;
step 3, adding PDMS and a curing agent into the uniform dispersion liquid obtained in the step 2, stirring by magnetic force until the solution is uniform and clear, and obtaining a component II;
and 4, adding perfluorodecyl trimethoxy silane into the component II, magnetically stirring, and stirring until the solution is not obviously layered to obtain the anti-doodling coating mixture.
9. The method for preparing the anti-doodling coating structure according to claim 7, wherein in the step 3, the curing process is performed by standing for 24-72 hours at normal temperature.
10. The method for preparing the anti-doodling coating structure according to claim 7, wherein in the step 3, the curing process is performed by heating for 1-2 hours at 40-80 ℃.
CN201911206649.8A 2019-11-29 2019-11-29 Anti-doodling coating structure and preparation method thereof Pending CN110845960A (en)

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Application publication date: 20200228