CN111978811A - Water-based single-component top-coat paint and preparation method thereof - Google Patents
Water-based single-component top-coat paint and preparation method thereof Download PDFInfo
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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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
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- 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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- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The application provides a water-based single-component top-coat paint, which comprises the following components in percentage by weight based on 100 percent of the total weight of the water-based single-component top-coat paint: 70-85% of waterborne acrylic modified polyurethane dispersion; 1.8-10% deionized water; 5-20% of quartz slurry; 1-2% of a silane coupling agent; 6-9% of a film-forming aid; 0.5-1% of defoaming agent; 0.2-0.6% of wetting and leveling agent; 0.5-1% of a thickening agent; the prepared water-based single-component top-coat paint has high hardness, strong water resistance and heat resistance, is not easy to cause the problem of hot cup mark, and expands the applicability of the water-based single-component top-coat paint.
Description
Technical Field
The application belongs to the technical field of coatings, and particularly relates to a water-based single-component top-coat paint and a preparation method thereof.
Background
With the rapid development of economy, people's interior decoration and furniture treatment are more and more interested in the property of environmental protection, so that the water-based paint is more and more favored in the aspect of paint use.
The water-based paint is a relatively novel paint in the paint market, and compared with a solvent paint, the water-based paint has the following characteristics: (1) the water-based paint takes water as a solvent, so that a large amount of resources are saved; the water-based paint eliminates the fire hazard during construction; the air pollution is reduced; the water paint only adopts a small amount of low-toxicity alcohol ether organic solvent, and can greatly improve the operating environmental conditions. (2) The water-based paint can be directly coated and constructed on a wet surface and in a humid environment; the water-based paint has good adaptability to the surface of the material and strong adhesive force of the coating. (3) The water paint coating tool can be cleaned by water, so that the consumption of cleaning solvent is greatly reduced. (4) The electrophoretic coating of the water-based paint is uniform and flat, and has good flattening property; the inner cavity, the welding seam, the edge and the edge part can be coated with a film with a certain thickness, and the protective property is good. It can be seen that the water-based paint has excellent characteristics and is expected to be widely used, but the water-based paint also has some defects to limit the universality of the use.
The water-based paint has large evaporation latent heat, namely is greatly influenced by temperature and humidity, particularly is used for the varnish paint on the surface of furniture, has insufficient hardness and poor heat resistance and water resistance, and when the water-based paint is used for pouring boiled water, drinking hot tea and coffee frequently, the furniture is burnt by a hot cup to form cup marks, so that the attractiveness is greatly influenced, and the application of the water-based single-component varnish paint is limited.
Disclosure of Invention
The application aims to provide a water-based single-component top-coat paint and a preparation method thereof, and aims to solve the problems that the water-based single-component top-coat paint in the prior art is low in strength, poor in heat resistance and water resistance and prone to hot cup mark.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides a water-based one-component top-coat paint, which comprises the following components in percentage by weight, based on 100% of the total weight of the water-based one-component top-coat paint:
in a second aspect, the application provides a preparation method of a water-based single-component top-coat paint, which comprises the following steps:
weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent;
and mixing the water-based acrylic modified polyurethane dispersion, the deionized water, the quartz slurry, the silane coupling agent, the film-forming assistant, the defoaming agent, the wetting and leveling agent and the thickening agent to obtain the water-based single-component top-coat paint.
The water-based single-component top-coat paint provided by the first aspect of the application takes the water-based acrylic modified polyurethane dispersoid as a base material, wherein the water-based acrylic modified polyurethane dispersoid is a core-shell structure base material obtained by modifying water-based polyurethane by using hard acrylate and inorganic silicon, and the base material is modified by using the hard acrylate and the inorganic silicon so as to have higher hardness, heat resistance and water resistance; further, the waterborne acrylic modified polyurethane dispersoid is compounded with quartz slurry and a silane coupling agent, the quartz slurry is wrapped by the silane coupling agent, hydroxyl provided by the silane coupling agent is combined with hydroxyl on the surface of the quartz slurry, and a hydrophobic end is combined with the waterborne acrylic modified polyurethane dispersoid to form a cross-linked three-dimensional network structure, so that the strength of the waterborne single-component top-coat paint is favorably improved, the surface tension of the waterborne acrylic modified polyurethane dispersoid can be reduced, and the hydrophobicity of the waterborne single-component top-coat paint is enhanced; meanwhile, the components of the film forming assistant, the defoaming agent, the wetting and leveling agent and the thickening agent are cooperated, so that the high hardness, the high water resistance and the high heat resistance of the water-based single-component top-coat paint can be further improved, the problem of hot cup mark of the prepared water-based single-component top-coat paint is solved, and the applicability of the water-based single-component top-coat paint is expanded.
According to the preparation method of the water-based single-component top-coat paint provided by the second aspect of the application, the components are uniformly mixed and dispersed, so that the water-based single-component top-coat paint can be obtained.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the present application, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, and c may be single or plural, respectively.
It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
The terms "first" and "second" are used for descriptive purposes only and are used for distinguishing purposes such as substances from one another, and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The first aspect of the embodiments of the present application provides a water-based one-component top-coat paint, which comprises the following components in percentage by weight, based on 100% of the total weight of the water-based one-component top-coat paint:
according to the water-based single-component top-coat paint provided by the first aspect of the application, the water-based acrylic modified polyurethane dispersoid is taken as a base material, wherein the water-based acrylic modified polyurethane dispersoid is a core-shell structure base material obtained by modifying water-based polyurethane by using hard acrylate and inorganic silicon, and the base material is compounded with quartz slurry and a silane coupling agent, so that a cross-linked net structure is favorably formed, the surface tension of the water-based single-component top-coat paint is improved, other components are further cooperated, the high hardness, high water resistance and high heat resistance of the water-based single-component top-coat paint are improved, the problem of hot cup printing of the prepared water-based single-component top-coat paint is solved, and the applicability of the water-based single-component top-coat paint is expanded.
Specifically, the water-based single-component top-coat paint comprises 70-85 wt% of water-based acrylic modified polyurethane dispersoid. On one hand, the hard acrylate is adopted to modify the waterborne polyurethane, so that the hardness, water resistance, heat resistance and flexibility of the waterborne polyurethane can be improved; on the other hand, the inorganic alkane is adopted to modify the waterborne polyurethane, so that the surface tension of the waterborne polyurethane is reduced, meanwhile, the hydrophobicity of the waterborne single-component top-coat paint can be enhanced, and the problem that the furniture paint is easy to have hot cup marks is solved. Preferably, the aqueous acrylic modified polyurethane dispersion is selected from aqueous acrylic modified polyurethane dispersions developed by Xinjiang province corporation.
In a specific embodiment of the present invention, the specific addition amount of the aqueous acrylic modified polyurethane dispersion is selected from 70 wt%, 72 wt%, 76 wt%, 78 wt%, 80 wt%, 82 wt%, 84 wt%, 85 wt%, based on the total weight of the aqueous one-component top-coat paint as 100%.
Specifically, the water-based single-component top-coat paint comprises 5-20 wt% of quartz slurry; the quartz slurry mainly comprises silicon dioxide, so that the hardness is high, and the addition of the quartz slurry is favorable for improving the hardness of the water-based single-component top-coat paint. In a specific embodiment of the present invention, the specific addition amount of the quartz slurry is selected from 5 wt%, 10 wt%, 15 wt%, and 20 wt%, based on 100 wt% of the total weight of the water-based one-component top-coat paint.
Preferably, the quartz slurry is selected from nano-scale quartz slurry, and the nano-scale quartz slurry is provided for ensuring that a reward with smaller particle size is provided and avoiding the obtained water-based single-component clear finish paint from being easy to agglomerate and cause inconvenience for use.
Further preferably, the nano-scale quartz slurry is selected from at least one of nano-scale quartz slurries of micromech a series.
Specifically, the water-based single-component top-coat paint comprises 1-2 wt% of silane coupling agent; the silane coupling agent and the quartz slurry are provided to have a synergistic effect and then are compounded with the waterborne acrylic modified polyurethane dispersoid for use, wherein the silane coupling agent is used for coating the quartz slurry, in the treatment process, hydroxyl of the silane coupling agent is combined with hydroxyl on the surface of silicon dioxide, and a hydrophobic end of the silane coupling agent is combined with the waterborne acrylic modified polyurethane dispersoid to form a stable cross-linked grid structure, so that the strength of the waterborne single-component top-coat paint is further improved, the surface tension of the waterborne acrylic modified polyurethane dispersoid can be reduced, and the hydrophobicity of the waterborne single-component top-coat paint is enhanced. In a specific embodiment of the present invention, the specific addition amount of the silane coupling agent is selected from 1 wt%, 1.2 wt%, 1.4 wt%, 1.6 wt%, 1.8 wt%, and 2 wt%, based on 100% of the total weight of the aqueous one-component top-coat paint.
Preferably, the silane coupling agent is selected from at least one of titanate coupling agent, KH550 and KH 560.
Specifically, the water-based single-component top-coat paint comprises 6-9 wt% of film-forming additive, and the addition of the film-forming additive can be beneficial to improving the film formation of the water-based single-component top-coat paint and greatly improving the film-forming property of the paint. In particular embodiments of the invention, the coalescing agent is added in an amount selected from 6 wt%, 6.5 wt%, 7 wt%, 7.5 wt%, 8 wt%, 8.5 wt%, 9 wt%.
Preferably, the coalescent includes at least one of dipropylene glycol methyl ether, propylene glycol butyl ether, dipropylene glycol butyl ether, and diethylene glycol butyl ether.
Specifically, the water-based single-component top-coat paint comprises 0.5-1 wt% of defoaming agent, and the defoaming agent is added to reduce the surface tension of the water-based single-component top-coat paint, so that the hydrophobicity of the paint is improved, and the formation of foam can be further prevented. In a specific embodiment of the invention, the amount of defoamer added is selected from 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1 wt%.
Preferably, the defoaming agent is selected from at least one of BYK024, BYK028, Tego 810 and Tego 902W.
Specifically, the water-based single-component top-coat paint comprises 0.2-0.6 wt% of a wetting and leveling agent, and the addition of the wetting and leveling agent can reduce the surface tension of the water-based single-component top-coat paint and improve the wettability of the paint; meanwhile, the method can keep better anti-shrinkage performance and can powerfully increase the surface smoothness and scratch resistance.
Preferably, the wetting and leveling agent is selected from at least one of BYK349, BYK333, Tego 4100.
Specifically, the water-based single-component top-coat paint comprises 0.5-1 wt% of a thickening agent, and the thickening agent is added into the water-based single-component top-coat paint, so that the fluid property of a paint system can be effectively changed, the viscosity of the paint can be improved during storage, the separation of the paint can be inhibited, the viscosity of the paint can be reduced during coating, the viscosity of a coated film can be improved after coating, and the phenomenon of sagging of a mucous membrane can be prevented. In a particular embodiment of the invention, the thickener is added in an amount selected from the group consisting of 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1 wt%.
Preferably, the thickener is selected from associative polyurethane thickeners, and the associative polyurethane thickeners are thickeners for water-based paint, can improve the viscosity of a system, and are favorable for being applied to water-based single-component top-coat paint. Further preferably, the associative polyurethane thickener is at least one selected from the group consisting of Ming's PUR40, Ming's PUR44, and Rohm-8W.
Specifically, the water-based single-component top-coat paint comprises 1.8-10% of deionized water, and the deionized water can be used for better mixing the components.
The second aspect of the embodiment of the application provides a preparation method of a water-based single-component top-coat paint, which comprises the following steps:
s01, weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming auxiliary agent, a defoaming agent, a wetting and leveling agent and a thickening agent;
s02, mixing the water-based acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent to obtain the water-based single-component top-coat paint.
According to the preparation method of the water-based single-component top-coat paint provided by the second aspect of the application, the components are uniformly mixed and dispersed, and the particle size obtained through dispersion treatment is controlled to be smaller, so that the water-based single-component top-coat paint can be obtained.
Specifically, in the step S01, the components including the aqueous acrylic modified polyurethane dispersion, the deionized water, the quartz slurry, the silane coupling agent, the film forming aid, the defoaming agent, the wetting and leveling agent, and the thickening agent are weighed, and the addition amounts and specific types of the components are as above, and are not described herein again for saving space.
Specifically, in the step S02, in the step of mixing the aqueous acrylic modified polyurethane dispersion, the deionized water, the quartz slurry, the silane coupling agent, the film-forming aid, the defoaming agent, the wetting and leveling agent, and the thickener, the mixing is performed at 2000 to 2500rpm to obtain the first mixture.
Further, the fineness of the first mixture is controlled to be 1-30 mu m, so that the water-based single-component top-coat paint is obtained, and the particle size of the water-based single-component top-coat paint is controlled to be finer, so that the effect of coating is improved in the using process.
The following description will be given with reference to specific examples.
Example 1
Water-based single-component top-coat paint
The water-based single-component top-coat paint comprises the following components in percentage by weight, based on 100 percent of the total weight of the water-based single-component top-coat paint:
wherein the aqueous acrylic modified polyurethane dispersion is selected from aqueous acrylic modified polyurethane dispersions of Shichen company;
the quartz slurry is selected from micro-minister A3;
the silane coupling agent is selected from KH 560;
the film-forming assistant is selected from a mixture of DPnB and DPM, wherein the addition amounts of DPnB and DPM are 0.4 wt% and 0.3 wt%, respectively;
the antifoaming agent is selected from Tego 902W;
the wetting and leveling agent is selected from BYK 349;
the thickener is selected from a mixture of PUR44 and RM-8W, wherein the addition amounts of PUR44 and RM-8W are 0.4 wt% and 0.3 wt%, respectively.
Preparation method of water-based single-component top-coat paint
Weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent according to the waterborne single-component top-coat paint in the embodiment 1;
mixing the water-based acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming aid, a defoaming agent, a wetting and leveling agent and a thickening agent at the rotating speed of 2000rpm to obtain a first mixture, and controlling the fineness of the first mixture to be 30 mu m to obtain the water-based single-component top-coat paint.
Example 2
Water-based single-component top-coat paint
The water-based single-component top-coat paint comprises the following components in percentage by weight, based on 100 percent of the total weight of the water-based single-component top-coat paint:
wherein the aqueous acrylic modified polyurethane dispersion is selected from aqueous acrylic modified polyurethane dispersions of Shichen company;
the quartz slurry is selected from micro-minister A3;
the silane coupling agent is selected from KH 560;
the film-forming assistant is selected from a mixture of DPnB and DPM, wherein the addition amounts of DPnB and DPM are 0.4 wt% and 0.4 wt%, respectively;
the antifoaming agent is selected from Tego 902W;
the wetting leveling agent is selected from BYK 333;
the thickener is selected from a mixture of PUR44 and RM-8W, wherein the addition amounts of PUR44 and RM-8W are 0.5 wt% and 0.3 wt%, respectively.
Preparation method of water-based single-component top-coat paint
Weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent according to the waterborne single-component top-coat paint in the embodiment 1;
mixing the water-based acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming aid, a defoaming agent, a wetting and leveling agent and a thickening agent at the rotating speed of 2000rpm to obtain a first mixture, and controlling the fineness of the first mixture to be 25 mu m to obtain the water-based single-component top-coat paint.
Comparative example 1
Water-based single-component top-coat paint
The water-based single-component top-coat paint comprises the following components in percentage by weight, based on 100 percent of the total weight of the water-based single-component top-coat paint:
wherein the aqueous acrylic modified polyurethane dispersion is selected from aqueous acrylic modified polyurethane dispersions of Shichen company;
the film-forming assistant is selected from a mixture of DPnB and DPM, wherein the addition amounts of DPnB and DPM are 0.4 wt% and 0.3 wt%, respectively;
the antifoaming agent is selected from Tego 902W;
the wetting and leveling agent is selected from BYK 349;
the thickener is selected from a mixture of PUR44 and RM-8W, wherein the addition amounts of PUR44 and RM-8W are 0.4 wt% and 0.3 wt%, respectively.
Preparation method of water-based single-component top-coat paint
Weighing the components of the waterborne acrylic modified polyurethane dispersion, deionized water, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent according to the waterborne single-component top-coat paint in the embodiment 1;
mixing the aqueous acrylic modified polyurethane dispersion, deionized water, a film-forming aid, a defoaming agent, a wetting and leveling agent and a thickening agent at the rotating speed of 2000rpm to obtain a first mixture, and controlling the fineness of the first mixture to be 25 microns to obtain the aqueous single-component top-coat paint.
Comparative example 2
Water-based single-component top-coat paint
The water-based single-component top-coat paint comprises the following components in percentage by weight, based on 100 percent of the total weight of the water-based single-component top-coat paint:
wherein the waterborne acrylic modified polyurethane dispersion is selected from the group consisting of commercially available waterborne acrylic modified polyurethane dispersions;
the quartz slurry is selected from micro-minister A3;
the silane coupling agent is selected from KH 560;
the film-forming assistant is selected from a mixture of DPnB and DPM, wherein the addition amounts of DPnB and DPM are 0.4 wt% and 0.3 wt%, respectively;
the antifoaming agent is selected from Tego 902W;
the wetting and leveling agent is selected from BYK 349;
the thickener is selected from a mixture of PUR44 and RM-8W, wherein the addition amounts of PUR44 and RM-8W are 0.4 wt% and 0.3 wt%, respectively.
Preparation method of water-based single-component top-coat paint
Weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent according to the waterborne single-component top-coat paint in the embodiment 1;
mixing the water-based acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming aid, a defoaming agent, a wetting and leveling agent and a thickening agent at the rotating speed of 2000rpm to obtain a first mixture, and controlling the fineness of the first mixture to be 25 mu m to obtain the water-based single-component top-coat paint.
Comparative example 3
Water-based single-component top-coat paint
The water-based single-component top-coat paint comprises the following components in percentage by weight, based on 100 percent of the total weight of the water-based single-component top-coat paint:
wherein the waterborne acrylic modified polyurethane dispersion is selected from the group consisting of commercially available waterborne acrylic modified polyurethane dispersions;
the quartz slurry is selected from micro-minister A3;
the silane coupling agent is selected from KH 560;
the film-forming assistant is selected from a mixture of DPnB and DPM, wherein the addition amounts of DPnB and DPM are 0.4 wt% and 0.3 wt%, respectively;
the antifoaming agent is selected from Tego 902W;
the wetting and leveling agent is selected from BYK 349;
the thickener is selected from a mixture of PUR44 and RM-8W, wherein the addition amounts of PUR44 and RM-8W are 0.4 wt% and 0.3 wt%, respectively.
Preparation method of water-based single-component top-coat paint
Weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent according to the waterborne single-component top-coat paint in the embodiment 1;
mixing the water-based acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming aid, a defoaming agent, a wetting and leveling agent and a thickening agent at the rotating speed of 2000rpm to obtain a first mixture, and controlling the fineness of the first mixture to be 25 mu m to obtain the water-based single-component top-coat paint.
Performance analysis:
the water-based single-component top-coat paint provided by the examples 1-2 and the comparative examples 1-3 is coated on the surface of the paintSpraying UV primer on the wood board to obtain a wood board with a thickness of 150um/m2After accelerated drying at 50 ℃ for 48 hours, the liquid resistance and hot water cup mark resistance were tested, and the test results are shown in table 1: comparative example 1 is different from example 1 in that quartz slurry, a silane coupling agent system are not used, and the effect of comparative example 1 is not ideal in hot cup printing;
comparative example 2 adopts a commercial common high-hardness PUA dispersion, quartz slurry and a silane coupling agent system, and compared with examples 1 and 2, the hardness of comparative example 2 is obviously improved, marks are obvious in a cup mark resistance test, and a whitening phenomenon and the marks are obvious when 2-hour heat-resistant cup mark treatment is carried out;
comparative example 3 adopts a common high-hardness PUA dispersion on the market and does not add a quartz slurry and a silane coupling agent system, compared with examples 1 and 2, the hardness of comparative example 3 is slightly lower, and the mark is obvious and the alcohol resistance effect is poor when the treatment is carried out on ethanol with the mass concentration of 50%; the hot cup printing treatment performed for 2 hours also exhibited a whitish appearance, marked clearly, and was difficult to recover.
It can be seen that the hardness of the examples 1 and 2 prepared by the preparation method of the invention achieves extremely high effect, the strength is high, the heat resistance and the water resistance are good, and the problem of hot cup printing can not occur.
TABLE 1
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The water-based single-component top-coat paint is characterized by comprising the following components in percentage by weight based on 100 percent of the total weight of the water-based single-component top-coat paint:
2. the waterborne one-component top-coat paint of claim 1, wherein the quartz slurry is selected from nano-scale quartz slurry.
3. The water-based one-component top-coat paint according to claim 2, wherein the nano-scale quartz slurry is at least one selected from nano-scale quartz slurries of micromech company A series.
4. The waterborne one-component clear top coating of claim 1, wherein the silane coupling agent is selected from at least one of titanate coupling agent, KH550, KH 560.
5. The waterborne one-component clear top coating according to any one of claims 1 to 4, wherein the film forming aid comprises at least one of dipropylene glycol methyl ether, propylene glycol butyl ether, dipropylene glycol butyl ether, and diethylene glycol butyl ether.
6. The water-based single-component clear top coating as claimed in any one of claims 1 to 4, wherein the defoaming agent is selected from at least one of BYK024, BYK028, Tego 810 and Tego 902W.
7. The water-based single-component clear top coating paint according to any one of claims 1 to 4, wherein the wetting and leveling agent is at least one selected from BYK349, BYK333 and Tego 4100.
8. The aqueous one-component top-coat paint according to any one of claims 1 to 4, wherein the thickener is selected from associative polyurethane thickeners.
9. The waterborne one-component top-coat paint of claim 8, wherein the associative polyurethane thickener is at least one selected from the group consisting of polyurethane PUR40, polyurethane PUR44, and polyurethane RM-8W.
10. A preparation method of the water-based single-component top-coat paint as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
weighing the components of the waterborne acrylic modified polyurethane dispersoid, deionized water, quartz slurry, a silane coupling agent, a film-forming assistant, a defoaming agent, a wetting and leveling agent and a thickening agent;
and mixing the water-based acrylic modified polyurethane dispersion, the deionized water, the quartz slurry, the silane coupling agent, the film-forming auxiliary agent, the defoaming agent, the wetting and leveling agent and the thickening agent to obtain the water-based single-component top-coat paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010787869.0A CN111978811A (en) | 2020-08-07 | 2020-08-07 | Water-based single-component top-coat paint and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010787869.0A CN111978811A (en) | 2020-08-07 | 2020-08-07 | Water-based single-component top-coat paint and preparation method thereof |
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| CN111978811A true CN111978811A (en) | 2020-11-24 |
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| CN202010787869.0A Pending CN111978811A (en) | 2020-08-07 | 2020-08-07 | Water-based single-component top-coat paint and preparation method thereof |
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