CN111961401A - Double-component water-based anti-expansion transparent primer and preparation method thereof - Google Patents
Double-component water-based anti-expansion transparent primer and preparation method thereof Download PDFInfo
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- CN111961401A CN111961401A CN202010890449.5A CN202010890449A CN111961401A CN 111961401 A CN111961401 A CN 111961401A CN 202010890449 A CN202010890449 A CN 202010890449A CN 111961401 A CN111961401 A CN 111961401A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The two-component water-based anti-expansion transparent primer is prepared by mixing the component A and the component B according to a certain ratio, the whole system is better in melting and dispersion, the acrylic resin is dissolved in the absolute ethyl alcohol and the deionized water, the drying speed of a paint film can be accelerated, and the cross-linking density and the hardness of the paint film are improved through the reaction of the acrylic resin and the isocyanate curing agent. The two-component water-based anti-expansion transparent primer is safe and environment-friendly, good in pore penetration, good in wood warming effect, and high-efficiency sealing performance, can seal wood well, and can avoid the problem of expansion of the wood after the water-based primer is sprayed on the wood, so that the original texture of the wood can be kept from being damaged, and the furniture wood has a better surface effect.
Description
Technical Field
The invention relates to the technical field of polyurethane primers, in particular to a two-component water-based anti-expansion transparent primer and a preparation method thereof.
Background
The wood lacquer is a kind of resin lacquer used for wood products, such as polyester, polyurethane lacquer, etc., which can be divided into water-based and oil-based, and can be divided into high gloss, semi-matte and matte according to the gloss, and can be divided into furniture lacquer, floor lacquer, etc. according to the application. Among them, the polyurethane paint is widely used in wood furniture and wood floor because of its tough paint film, full gloss, strong adhesion, water resistance, wear resistance and corrosion resistance.
Polyurethane paints, also known as polyurethane paints, can be classified according to the hydroxyl-containing component: in the furniture coating industry, when the existing waterborne polyurethane paint is sprayed on the surface of furniture, water molecules are easy to permeate into gaps of the internal structure of the wood of the furniture, so that the texture and water of the wood are protruded, the problem of wood expansion is caused, and the surface effect of the furniture is influenced.
Disclosure of Invention
Based on the above, there is a need for a two-component water-based anti-swelling transparent primer and a preparation method thereof.
The technical scheme for solving the technical problems is as follows: a double-component water-based anti-expansion transparent primer comprises the following components:
the component A comprises the following raw material components in parts by weight:
the component B comprises the following raw material components in parts by weight:
5 to 10 portions of absolute ethyl alcohol
10-23 parts of isocyanate curing agent.
In one embodiment, the a component further comprises:
2 to 5 portions of anti-white water
0.3 to 0.6 portion of flatting agent.
In one embodiment, the weight ratio of the A component to the B component is 1: 0.7-1.
In one embodiment, the isocyanate curing agent is a water dispersible polyisocyanate curing agent.
In one embodiment, the acrylic resin in the a component is 55 to 65 parts by weight.
In one embodiment, the weight part of the isocyanate curing agent in the B component is 13 to 20 parts.
A preparation method of a double-component water-based anti-expansion transparent primer comprises the following steps:
mixing and stirring evenly 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water and 5-10 parts of propylene glycol methyl ether, and sealing and storing to prepare a component A;
5 to 10 portions of absolute ethyl alcohol and 10 to 23 portions of isocyanate curing agent are mixed and stirred evenly, sealed and stored to prepare the component B.
In one embodiment, when 50 to 70 parts of acrylic resin, 8 to 16 parts of absolute ethyl alcohol, 15 to 25 parts of deionized water and 5 to 10 parts of propylene glycol methyl ether are mixed, stirred uniformly and sealed for storage to prepare the component a, the method further comprises the following steps:
putting 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water, 5-10 parts of propylene glycol methyl ether, 2-5 parts of white water prevention and 0.2-0.5 part of flatting agent into a stirrer, mixing and stirring uniformly at the vacuum degree of-0.04-0.10 MPa and the rotating speed of 35-45 r/min, and then sealing and storing to obtain the component A.
In one embodiment, when 5 to 10 parts of absolute ethyl alcohol and 10 to 23 parts of isocyanate curing agent are mixed and stirred uniformly, and then sealed and stored, the component B is prepared, which comprises:
and (2) using a planetary stirrer to uniformly mix and stir 5 to 10 parts of absolute ethyl alcohol and 10 to 23 parts of isocyanate curing agent under the conditions of vacuum degree of-0.04 to-0.10 MPa and rotating speed of 35 to 45r/min, and then sealing and storing to obtain the component B.
The invention has the beneficial effects that: according to the two-component water-based anti-expansion transparent primer provided by the invention, the component A and the component B are mixed according to a certain proportion, so that the prepared two-component water-based anti-expansion transparent primer has good overall melting and dispersion of a system, the acrylic resin is dissolved in the absolute ethyl alcohol and the deionized water, the drying speed of a paint film can be accelerated, and the cross-linking density and hardness of the paint film are improved through the reaction of the acrylic resin and the isocyanate curing agent. The two-component water-based anti-expansion transparent primer is safe and environment-friendly, good in pore penetration, good in wood warming effect, and high-efficiency sealing performance, can seal wood well, and can avoid the problem of expansion of the wood after the water-based primer is sprayed on the wood, so that the original texture of the wood can be kept from being damaged, and the furniture wood has a better surface effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic flow chart of a two-component water-based anti-swelling transparent primer according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, the two-component water-based anti-expansion transparent primer comprises the following components:
the component A comprises the following raw material components in parts by weight:
the component B comprises the following raw material components in parts by weight:
5 to 10 portions of absolute ethyl alcohol
10-23 parts of isocyanate curing agent.
In this embodiment, the main raw materials for forming the two-component water-based anti-swelling transparent primer include acrylic resin and isocyanate curing agent, the acrylic resin is water-based acrylic resin, which is light in color and white and transparent, the isocyanate curing agent is used as a primary medium in the polymerization process, and can play a role in improving drying speed, extinction and hardness, after the isocyanate curing agent is added, the acrylic resin reacts with the isocyanate curing agent, so that the crosslinking density and hardness of a paint film are improved, the formed paint film has excellent performance, good light resistance, heat resistance, weather resistance and corrosion resistance, the water-based acrylic resin has extremely high dispersion degree in water, and has outstanding permeability and sealing performance, capillary holes filled in the substrate can be sealed, the number of open holes in the substrate is reduced, the overall sealing performance is improved, and thus the water-soluble pigment or tannic acid can be inhibited from leaking out of wood, and the water in the primer is inhibited from permeating into the wood, so that the wood is prevented from rib expansion. In addition, the water-based acrylic resin also has the advantages of high hardness, high drying speed, high transparency and the like, and can ensure that the coating layer becomes uniform. Correspondingly, the isocyanate curing agent is a water-dispersible polyisocyanate curing agent, so that the water-based acrylic resin and the isocyanate curing agent can be uniformly dispersed in water, the dispersity of the water-based acrylic resin and the isocyanate curing agent in water is higher, the combination can be better carried out, and the crosslinking density of a formed paint film is improved.
Furthermore, the acrylic resin can also be nano water-based acrylic resin, the particle size is in a nano range, the nano water-based acrylic resin has more outstanding permeability and sealing property and small expansion coefficient, and can fill capillary pores in the substrate more easily to seal the capillary pores, so that the wood can be dried quickly and the occurrence of rib swelling can be better prevented. Furthermore, 0.2-0.6 part of waterproof sealing agent can be added to prevent the invasion of moisture, and the waterproof sealing agent can play a role of preventing the moisture from being soaked into the wood in cooperation with the water-based acrylic resin, so that the problems of color permeation and rib expansion are prevented, and meanwhile, moths and mildew breeding can be prevented, so that the wood is effectively protected, the durability and the corrosion resistance of the wood are improved, the waterproof sealing agent is a permeable wood protection sealing agent, for example, the waterproof sealing agent is a tannic acid sealing agent, so that the moisture corrosion can be prevented, the wood is sealed, the density and the hardness of the wood are enhanced, the connectivity between the water paint and the wood can be improved, the moths and the mildew breeding can be prevented, and the service life of the coating is prolonged.
In this embodiment, the absolute ethyl alcohol is an excellent organic solvent, colorless and clear, capable of being mutually dissolved with water, chloroform, ether and other organic solvents in any proportion, has excellent solubility and fast-drying property, can well dissolve the acrylic resin and the isocyanate curing agent, is volatile, can be quickly volatilized and dried after a paint film is formed, is a non-polluted solvent with multiple functional groups, has ether groups and hydroxyl groups in the molecular structure, is a low-toxicity high-grade industrial solvent with excellent performance, has strong dissolving capacity for polar and nonpolar substances, is suitable for solvents of various polymers of paint and ink, is suitable for unsaturated polyester, polyurethane resin, acrylic resin, epoxy resin and the like, has good volatilization rate, and is matched with the absolute ethyl alcohol, can be quickly volatilized and dried after a paint film is formed.
Further, the component A also comprises: 2 to 5 portions of white water proof and 0.3 to 0.6 portion of flatting agent. Specifically, the anti-white water is ethylene glycol monobutyl ether, an organic solvent with multifunctional ether is an excellent solvent and an excellent surfactant, and has hydrophilic groups and lipophilic groups, the molecules of the surfactant can be adsorbed on the interface of an oil-water two phase, the hydrophilic groups are contacted with water, the lipophilic groups are contacted with acrylic resin, namely, the hydrophilic groups and the lipophilic groups are directionally arranged on the interface to form a continuous phase, so that tension is generated between the oil-water phase, the oil-water interfacial tension is reduced, and a smooth paint film is facilitated. The leveling agent is added with a proper amount of the leveling agent, so that the leveling wettability of the primer can be obviously improved, the leveling agent is butyl cellulose, a flat, smooth and uniform paint film can be formed in the drying and film forming process of the paint during the coating process of the primer, the surface tension of the coating liquid can be effectively reduced, the leveling property and uniformity of the coating liquid can be improved, the possibility of generating spots and stains during brushing can be reduced by improving the permeability of the coating liquid, the coverage property is improved, the film forming is uniform and natural, and meanwhile, the coating liquid has high compatibility and can be well compatible with other components.
In one embodiment, the weight ratio of the A component to the B component is 1: 0.7-1. Specifically, when the two-component water-based anti-swelling transparent primer is used, the component a and the component B need to be uniformly mixed according to a certain ratio for use, for example, the weight ratio between the component a and the component B can be 1:0.7, for example, the weight ratio between the component a and the component B can be 1:1, the acrylic resin has good flexibility and good film forming property, when the two-component water-based anti-swelling transparent primer is used in combination with the isocyanate curing agent, the drying speed of a paint film can be increased, and the crosslinking density and hardness of the paint film are improved, in a preferable formula, the weight part of the acrylic resin in the component a is 55-65 parts, and the weight part of the isocyanate curing agent in the component B is 13-20 parts.
In order to better avoid the problem of rib expansion after the wood is sprayed with the water-based primer, in one embodiment, the acrylic resin in the component A is a modified acrylic resin, and the modified acrylic resin is obtained by mixing acrylic polyurethane resin and water-based acrylic resin according to a weight ratio of 0.6-0.8: 1. Specifically, the modified acrylic resin includes: the acrylic polyurethane resin and the water-based acrylic resin are mixed according to a weight ratio of 0.6-0.8: 1, the glass transition temperature of the acrylic polyurethane resin is 44-46 ℃, the glass transition temperature of the water-based acrylic resin is 24-26 ℃, the glass transition temperature is an important performance index of the high polymer, also called as secondary transition temperature, and is the temperature at which the high polymer is converted from an elastic state to a glassy state, and is specifically shown above the temperature, and the high polymer is shown to be elastic; below this temperature, the high polymer exhibits brittleness. The modified acrylic resin is one of high polymers, and the glass transition temperature of the modified acrylic resin reflects the hardness of the formed paint film. The glass transition temperature of the water-based acrylic resin is 24-26 ℃, and the water-based acrylic resin has excellent film forming property and is beneficial to forming a film by using the coating; the acrylic polyurethane resin has a glass transition temperature of 44-46 ℃, has a good rib expansion resistance effect, has a good discoloration prevention effect, and can avoid the problem of rib expansion after spraying of a water-based primer on wood. Therefore, by selecting two acrylic polyurethane resins with different glass transition temperatures and the water-based acrylic resin for mixing modification, the water-based primer is favorable for film formation, and the requirement of the water-based primer on rib expansion resistance can be met.
Further, the acrylic polyurethane resin is of a core-shell structure, the core-shell structure comprises a polyurethane shell and an acrylic resin core, and under the action of the polyurethane shell, the acrylic polyurethane resin can quickly penetrate into wood fibers of wood to seal the end part of the wood fiber conduit; under the action of the acrylic resin core, the water resistance rise time of the paint film is short, and then the expansion of the internal wood fiber can be effectively avoided, so that the problem of rib expansion in the coating process is effectively avoided. Furthermore, the acrylic polyurethane resin contains polar groups such as ester groups and amino groups, hydrogen bonds can be formed in molecules and among molecules, the intermolecular force is increased, and the acrylic polyurethane resin and the hydroxyl groups of wood fibers can form hydrogen bonds to form a stable structure, so that the two-component water-based rib-expansion-preventing transparent primer can prevent rib expansion, can improve the hardness of the water-based primer and wood after coating, and has the advantages of strong adhesion, water resistance, organic solvent resistance and good wear resistance.
To further increase the hardness of the wood after spraying the water-based primer, in one embodiment, the a component further comprises: 5 to 10 parts of ethanolamine. In particular, ethanolamine can be used as a plasticizer, an accelerator and an emulsifier of synthetic resin and rubber, and can also be used as a carbon dioxide absorbent, and the functional group of the ethanolamine comprises hydroxyl and amine, so that the molecular structure of the wood fiber is stable and the situation of rib expansion of the wood fiber can be prevented by forming hydrogen bond between the amine of the ethanolamine and the hydroxyl of the wood fiber. Meanwhile, the hydroxyl group of the ethanolamine can adjust the pH value of the primer, and all the components can play a role and maintain the performance by adjusting the pH value of the primer within a proper range. Meanwhile, the ethanolamine and the acrylic resin are used, so that the emulsification degree of the acrylic resin can be improved, an acrylic emulsion is formed, the film forming property of the water-based primer is further improved, and a flat, smooth and uniform paint film is formed.
In this embodiment, the two-component aqueous rib-swelling-preventing transparent primer comprises aqueous acrylic resin, acrylic polyurethane resin and ethanolamine, the aqueous acrylic resin has the advantage of rapid drying, in the coating process of the primer, the aqueous acrylic resin can be rapidly dried on the surface of wood fibers to prevent the wood fibers from absorbing water and swelling in the primer coating, the acrylic polyurethane resin has a good rib-swelling-preventing effect and a good anti-discoloration effect, the hardness of the coated wood made of the aqueous primer and wood can be improved, the ethanolamine can be in hydrogen bond combination with the hydroxyl groups of the wood fibers to further prevent the wood fibers from rib-swelling, the emulsification degree of the acrylic resin can be improved, and a flat, smooth and uniform paint film can be formed. Therefore, the water-based acrylic resin, the acrylic polyurethane resin and the ethanolamine supplement each other, namely, the water-based acrylic resin is quickly dried, the enhanced hardness of the acrylic polyurethane resin and the ethanolamine are beneficial to film formation, the problem of rib expansion after the water-based primer is sprayed on the wood can be effectively solved, and the paint film is flat, smooth and high in hardness.
In order to further improve the curing speed of the paint film after the two-component water-based anti-rib-swelling transparent primer is coated, in one embodiment, the B component further comprises: 5 to 10 parts of styrene which is an organic compound formed by substituting benzene for one hydrogen atom of the ethylene, the electrons of the vinyl are conjugated with a benzene ring, the curing agent component is formed by dissolving in absolute ethyl alcohol in the component B and uniformly dispersing in the absolute ethyl alcohol with the isocyanate curing agent, and the styrene is used as a cross-linking agent in the polymerization process, the acrylic polyurethane resin has high copolymerization reaction activity, can play a role in quick crosslinking, is favorable for improving the mechanical property of a paint film, can improve the drying speed of a paint film, can further improve the crosslinking density and hardness of the paint film by matching with the isocyanate curing agent, and the formed paint film has excellent performance, good light resistance, heat resistance, weather resistance and corrosion resistance, and the paint film is high in curing speed, so that the problem of rib expansion after the water-based primer is sprayed on the wood can be avoided. Meanwhile, the styrene is used as a diluent, so that the shrinkage rate can be reduced, the viscosity of the acrylic polyurethane resin is reduced, the use is convenient, and the film forming is facilitated.
As shown in fig. 1, in one embodiment, there is provided a method for preparing the two-component water-based anti-swelling transparent primer in the above embodiments, and a method for preparing the two-component water-based anti-swelling transparent primer includes:
Specifically, when 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water and 5-10 parts of propylene glycol methyl ether are mixed and stirred uniformly, sealed and stored to prepare the component A, 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water and 5-10 parts of propylene glycol methyl ether are mixed and stirred uniformly by using a planetary stirrer under the conditions that the vacuum degree is-0.04-0.10 MPa and the rotating speed is 35-45 r/min, and then sealed and stored to prepare the component A. Further, another preparation method for preparing the component A is that 50 to 70 parts of acrylic resin, 8 to 16 parts of absolute ethyl alcohol, 15 to 25 parts of deionized water, 5 to 10 parts of propylene glycol methyl ether, 2 to 5 parts of white water and 0.2 to 0.5 part of flatting agent are put into a stirrer, and the components A are uniformly mixed and stirred at the vacuum degree of-0.04 to-0.10 MPa and the rotating speed of 35 to 45r/min and then sealed and stored to prepare the component A.
And 120, mixing and stirring 5 to 10 parts of absolute ethyl alcohol and 10 to 23 parts of isocyanate curing agent uniformly, and sealing and storing to obtain the component B.
Specifically, when 5-10 parts of absolute ethyl alcohol and 10-23 parts of isocyanate curing agent are mixed and stirred uniformly, and sealed and stored to prepare the component B, the method comprises the following steps: and (2) using a planetary stirrer to uniformly mix and stir 5 to 10 parts of absolute ethyl alcohol and 10 to 23 parts of isocyanate curing agent under the conditions of vacuum degree of-0.04 to-0.10 MPa and rotating speed of 35 to 45r/min, and then sealing and storing to obtain the component B.
In the embodiment, the prepared component A and the component B are mixed according to the volume ratio of 1: 0.7-1 to prepare the two-component water-based anti-swelling transparent primer, the whole system is good in melting and dispersion, the acrylic resin is dissolved in the absolute ethyl alcohol and the deionized water, the drying speed of a paint film can be increased, and the cross-linking density and the hardness of the paint film are improved through the reaction of the acrylic resin and the isocyanate curing agent. The two-component water-based anti-expansion transparent primer is safe and environment-friendly, good in pore penetration, good in wood warming effect, and high-efficiency sealing performance, can seal wood well, and can avoid the problem of expansion of the wood after the water-based primer is sprayed on the wood, so that the original texture of the wood can be kept from being damaged, and the furniture wood has a better surface effect.
The invention is further described below with reference to specific examples.
Example 1
Mixing and stirring 50 parts of acrylic resin, 8 parts of absolute ethyl alcohol, 15 parts of deionized water and 5 parts of propylene glycol methyl ether uniformly, and sealing and storing to obtain a component A; 5 parts of absolute ethyl alcohol and 10 parts of isocyanate curing agent are mixed and stirred uniformly, sealed and stored to prepare a component B; and mixing the component A and the component B according to the volume ratio of 1:0.7 to prepare the two-component water-based anti-expansion transparent primer.
The two-component aqueous anti-swelling transparent primer prepared by the embodiment has the advantages of better overall melting and dispersing of the system, high drying rate, good penetration of the entering holes, good wood warming effect, high-efficiency sealing performance, capability of sealing wood well and capability of avoiding the problem of swelling of the wood after the aqueous primer is sprayed on the wood.
Example 2
Mixing and uniformly stirring 60 parts of acrylic resin, 10 parts of absolute ethyl alcohol, 20 parts of deionized water and 7 parts of propylene glycol methyl ether, sealing and storing to obtain a component A, wherein the acrylic resin is modified acrylic resin, and the modified acrylic resin is obtained by mixing acrylic polyurethane resin and water-based acrylic resin according to a weight fraction ratio of 0.6: 1; mixing 7 parts of absolute ethyl alcohol and 16 parts of isocyanate curing agent, stirring uniformly, sealing and storing to obtain a component B; and mixing the component A and the component B according to the volume ratio of 1:0.8 to prepare the two-component water-based anti-expansion transparent primer.
The two-component aqueous anti-swelling transparent primer prepared by the embodiment has the advantages of better overall melting and dispersing of the system, high drying rate, good penetration of the entering holes, good wood warming effect, high-efficiency sealing performance, capability of sealing wood well and capability of avoiding the problem of swelling of the wood after the aqueous primer is sprayed on the wood.
Compared with the embodiment 1, the acrylic resin in the embodiment is modified acrylic resin, the modified acrylic resin is obtained by mixing acrylic polyurethane resin and water-based acrylic resin, and the content of each component is increased, compared with the embodiment 1, the two-component water-based anti-expansion transparent primer prepared in the embodiment forms a flat, smooth and uniform paint film better, improves the leveling property and uniformity of the paint film, is beneficial to forming the water-based primer, and can meet the requirement of the water-based primer on expansion resistance, so that the paint surface is more uniform and natural.
Example 3
Mixing and uniformly stirring 70 parts of acrylic resin, 16 parts of absolute ethyl alcohol, 25 parts of deionized water, 10 parts of propylene glycol methyl ether and 10 parts of ethanolamine, sealing and storing to obtain a component A, wherein the acrylic resin is modified acrylic resin, and the modified acrylic resin is obtained by mixing acrylic polyurethane resin and water-based acrylic resin according to a weight fraction ratio of 0.6: 1; mixing 10 parts of absolute ethyl alcohol and 23 parts of isocyanate curing agent, stirring uniformly, sealing and storing to obtain a component B; and mixing the component A and the component B according to the volume ratio of 1:1 to prepare the two-component water-based anti-expansion transparent primer.
The two-component aqueous anti-swelling transparent primer prepared by the embodiment has the advantages of better overall melting and dispersing of the system, high drying rate, good penetration of the entering holes, good wood warming effect, high-efficiency sealing performance, capability of sealing wood well and capability of avoiding the problem of swelling of the wood after the aqueous primer is sprayed on the wood.
Compared with the example 2, in the embodiment, 10 parts of ethanolamine is added, and the content of each component is increased, compared with the example 2, the two-component water-based rib-swelling-preventing transparent primer prepared in the embodiment has the advantages that the amine group of the ethanolamine and the hydroxyl group of the wood fiber form hydrogen bond, the molecular structure of the wood fiber is stable, the rib swelling of the wood fiber can be prevented, and the hardness of the wood after the water-based primer is sprayed is improved. Meanwhile, the pH value of the primer can be adjusted, so that the components can play a role and maintain the performance.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The double-component water-based anti-expansion transparent primer is characterized by comprising the following components:
the component A comprises the following raw material components in parts by weight:
the component B comprises the following raw material components in parts by weight:
5 to 10 portions of absolute ethyl alcohol
10-23 parts of isocyanate curing agent.
2. The two-component aqueous rib-swelling-preventing transparent primer according to claim 1, wherein the component A further comprises:
2 to 5 portions of anti-white water
0.3 to 0.6 portion of flatting agent.
3. The two-component water-based anti-swelling transparent primer according to claim 2, wherein the weight ratio of the component A to the component B is 1: 0.7-1.
4. The two-component water-based rib-swelling preventing transparent primer according to claim 1, wherein the isocyanate curing agent is a water-dispersible polyisocyanate curing agent.
5. The two-component water-based anti-rib-swelling transparent primer according to claim 1, wherein the acrylic resin in the component A is 55 to 65 parts by weight.
6. The two-component water-based anti-swelling transparent primer according to claim 5, wherein the isocyanate curing agent is present in the component B in an amount of 13 to 20 parts by weight.
7. A preparation method of a double-component water-based anti-expansion transparent primer is characterized by comprising the following steps:
mixing and stirring evenly 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water and 5-10 parts of propylene glycol methyl ether, and sealing and storing to prepare a component A;
5 to 10 portions of absolute ethyl alcohol and 10 to 23 portions of isocyanate curing agent are mixed and stirred evenly, sealed and stored to prepare the component B.
8. The preparation method of the two-component water-based anti-swelling transparent primer as claimed in claim 7, wherein the preparation method comprises the following steps of mixing and stirring uniformly 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water and 5-10 parts of propylene glycol methyl ether, and sealing and storing to obtain the component A, wherein the preparation method further comprises the following steps:
putting 50-70 parts of acrylic resin, 8-16 parts of absolute ethyl alcohol, 15-25 parts of deionized water, 5-10 parts of propylene glycol methyl ether, 2-5 parts of white water prevention and 0.2-0.5 part of flatting agent into a stirrer, mixing and stirring uniformly at the vacuum degree of-0.04-0.10 MPa and the rotating speed of 35-45 r/min, and then sealing and storing to obtain the component A.
9. The preparation method of the two-component water-based anti-swelling transparent primer as claimed in claim 7, wherein the step of mixing 5-10 parts of absolute ethanol and 10-23 parts of isocyanate curing agent uniformly, and sealing and storing to obtain the component B comprises the following steps:
and (2) using a planetary stirrer to uniformly mix and stir 5 to 10 parts of absolute ethyl alcohol and 10 to 23 parts of isocyanate curing agent under the conditions of vacuum degree of-0.04 to-0.10 MPa and rotating speed of 35 to 45r/min, and then sealing and storing to obtain the component B.
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