CN112778811B - Environment-friendly wood paint and preparation method thereof - Google Patents
Environment-friendly wood paint and preparation method thereof Download PDFInfo
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- CN112778811B CN112778811B CN202011624094.1A CN202011624094A CN112778811B CN 112778811 B CN112778811 B CN 112778811B CN 202011624094 A CN202011624094 A CN 202011624094A CN 112778811 B CN112778811 B CN 112778811B
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
Abstract
The invention relates to a wood lacquer, in particular to an environment-friendly wood lacquer and a preparation method thereof. An environment-friendly wood paint comprises a primer and a finish; the raw materials of the finish paint comprise acrylic resin, an active monomer, a photoinitiator, a dispersing agent, a defoaming agent, a leveling agent and matting powder; the primer comprises raw materials of acrylic resin, active monomers, a photoinitiator, a dispersing agent, a defoaming agent, a leveling agent and pigment fillers. The woodenware paint disclosed by the invention has good hardness and adhesive force, and the paint surface after coating construction has good appearance.
Description
Technical Field
The invention relates to a wood lacquer, in particular to an environment-friendly wood lacquer and a preparation method thereof.
Background
With the development and progress of society, people's environmental awareness is gradually enhanced, and various countries have formulated environmental regulations to limit harmful compounds (VOC) in coatings, such as national standard GB1851-2009 harmful substance limits in interior decorative materials and solvent-based wood coatings, which puts forward a clear requirement on the limit of VOC in wood coatings, and aqueous wood coatings have lower VOC than solvent-based wood coatings.
UV paints are UV light-curable paints, also known as photo-initiation coatings, photo-curable coatings. The paint is automatically coated on the surface of a furniture board by roller coating and curtain coating through mechanical equipment, an initiator is promoted to decompose under the irradiation of ultraviolet light to generate free radicals, resin reaction is initiated, and the paint is instantly cured to form a film and is the most environment-friendly paint at present. The UV paint is widely applied furniture paint and is mainly characterized in that: through the strong ultraviolet light curing treatment, the color is stable and is always new for a long time, and the problems of door panel color fading and color difference are effectively solved.
Therefore, the water-based wood lacquer prepared by using the UV technology is available in the market at present, but the wood lacquer has the problems of low hardness, foaming phenomenon in the curing process and the like.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention is an environment-friendly wood paint, which comprises a primer and a finish; the raw materials of the finish paint comprise acrylic resin, an active monomer, a photoinitiator, a dispersing agent, a defoaming agent, a leveling agent and matting powder; the primer comprises raw materials of acrylic resin, active monomers, a photoinitiator, a dispersing agent, a defoaming agent, a leveling agent and pigment fillers.
According to a preferable technical scheme, the finishing paint comprises the following raw materials, by weight, 50-70 parts of acrylic resin, 10-20 parts of active monomer, 4-6 parts of photoinitiator, 0.3-0.8 part of dispersant, 0.1-0.4 part of defoaming agent, 0.2-0.6 part of flatting agent and 1-4 parts of matting powder; the primer comprises, by weight, 50-70 parts of acrylic resin, 10-20 parts of active monomer, 4-6 parts of photoinitiator, 0.6-1 part of dispersant, 0.1-0.4 part of defoamer, 0.2-0.6 part of flatting agent and 2-6 parts of pigment and filler.
In a preferred embodiment of the present invention, the acrylic resin is at least one selected from the group consisting of silicone-modified acrylic resin, aqueous epoxy-modified acrylic resin, aqueous self-crosslinking acrylic resin, and aqueous acrylic resin.
As a preferred embodiment of the present invention, the leveling agent is a leveling agent containing a hydroxyl group.
In a preferred embodiment of the present invention, the reactive monomer includes an acrylate reactive monomer containing a hydroxyl group.
In a preferred embodiment of the present invention, the reactive monomer further includes an acrylate reactive monomer containing a phenyl group.
In a preferred embodiment of the present invention, the photoinitiator is selected from at least one of a photoinitiator 1173, a photoinitiator 184, a photoinitiator 819, a photoinitiator 907, and a photoinitiator ITX.
In a preferred embodiment of the present invention, the defoamer is a polyether modified polysiloxane defoamer.
As a preferred technical scheme of the invention, the pigment and filler is talcum powder.
The second aspect of the invention provides a preparation method of environment-friendly wood paint, which comprises the following steps: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the extinction powder at a high speed to obtain finish paint; preparing a primer: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the pigment and the filler at a high speed to obtain the primer.
The invention has the following beneficial effects:
1. the proper acrylic resin is selected to increase the adhesive force of the wood lacquer on the wood;
2. the wood lacquer has good flexibility and hardness by adding the active monomer;
3. the wood lacquer can be used for full-automatic coating construction by adopting spraying equipment, and can be used for spraying high-resistance transparent primer and finish paint in a matching way without manual contact;
4. the wood lacquer disclosed by the invention does not contain organic volatile matters, is degradable, safe and nontoxic, is high in drying speed, low in energy consumption, environment-friendly, good in weather resistance and excellent in performance, and has great social value and economic value;
5. the wood lacquer passes the thermal expansion and cold contraction test, passes the cold and hot circulation, and has no abnormal film in the household chemical resistance test.
Detailed Description
The invention will be further understood by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. 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. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definition provided in the present disclosure, the definition of the term provided in the present disclosure controls.
As used herein, a feature that does not define a singular or plural form is also intended to include a plural form of the feature unless the context clearly indicates otherwise. It will be further understood that the term "prepared from …," as used herein, is synonymous with "comprising," including, "comprising," "having," "including," and/or "containing," when used in this specification means that the recited composition, step, method, article, or device is present, but does not preclude the presence or addition of one or more other compositions, steps, methods, articles, or devices. Furthermore, the use of "preferred," "preferably," "more preferred," etc., when describing embodiments of the present invention, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
The first aspect of the invention provides an environment-friendly wood paint, which comprises a primer and a finish; the raw materials of the finish paint comprise acrylic resin, an active monomer, a photoinitiator, a dispersing agent, a defoaming agent, a leveling agent and matting powder; the primer comprises raw materials of acrylic resin, active monomers, a photoinitiator, a dispersing agent, a defoaming agent, a leveling agent and pigment fillers.
In one embodiment, the raw materials of the finish paint comprise, by weight, 50-70 parts of acrylic resin, 10-20 parts of active monomer, 4-6 parts of photoinitiator, 0.3-0.8 part of dispersant, 0.1-0.4 part of defoamer, 0.2-0.6 part of flatting agent and 1-4 parts of matting powder; the primer comprises, by weight, 50-70 parts of acrylic resin, 10-20 parts of active monomer, 4-6 parts of photoinitiator, 0.6-1 part of dispersant, 0.1-0.4 part of defoamer, 0.2-0.6 part of flatting agent and 2-6 parts of pigment and filler.
In a preferred embodiment, the raw materials of the finish paint comprise, by weight, 60 parts of acrylic resin, 15 parts of active monomer, 5 parts of photoinitiator, 0.5 part of dispersant, 0.3 part of defoamer, 0.4 part of leveling agent and 3 parts of matting powder; the primer comprises the following raw materials, by weight, 60 parts of acrylic resin, 15 parts of active monomer, 5 parts of photoinitiator, 0.8 part of dispersant, 0.3 part of defoamer, 0.4 part of flatting agent and 4 parts of pigment and filler.
Acrylic resin
In one embodiment, the acrylic resin is selected from at least one of silicone modified acrylic resin, waterborne epoxy modified acrylic resin, waterborne self-crosslinking acrylic resin, and waterborne acrylic resin.
In a preferred embodiment, the acrylic resin is a mixture of a waterborne epoxy modified acrylic resin, a waterborne self-crosslinking acrylic resin and a waterborne acrylic resin; the weight ratio of the mixture of the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin is (2-3): (1.2-1.5): 1; more preferably, the weight ratio of the mixture of the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin is 2.5: 1.3: 1.
the applicant finds that the adhesive force of the wood lacquer on wood can be increased by using the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin in the system.
In one embodiment, the pH value of the waterborne epoxy modified acrylic resin is 7.0-8.0; the viscosity of the waterborne epoxy modified acrylic resin is 1000-2000 mPa & s; more preferably, the viscosity of the waterborne epoxy modified acrylic resin is 1300-1600 mPas; more preferably, the viscosity of the aqueous epoxy-modified acrylic resin is 1500 as.
In one embodiment, the waterborne epoxy modified acrylic resin is DIC ELW-270.
In one embodiment, the viscosity of the aqueous self-crosslinking acrylic resin is 500 to 900 mPas; more preferably, the viscosity of the self-crosslinkable acrylic resin is 720mPa · s.
In one embodiment, the aqueous self-crosslinking acrylic resin is DSM Setaqua 6716.
In one embodiment, the aqueous acrylic resin has an annual viscosity of 150 to 200mPa · s; more preferably, the aqueous acrylic resin has an annual viscosity of 180mPa · s.
In one embodiment, the aqueous acrylic resin is DSM Neocryl XK-84.
The applicant discovers through research that the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin with different viscosities are selected in the system, the acrylic resin with a certain viscosity gradient increases the adhesive force of the wood lacquer on the wood ware substrate, the waterborne self-crosslinking acrylic resin enables the system to have a certain crosslinking density, the adhesive force of the wood lacquer on the wood ware substrate is further increased, the defoaming agent can well play a role in the system by controlling the pH and the viscosity of the system, and finally the prepared wood lacquer has better surface performance on the wood ware substrate.
Reactive monomer
To increase the flexibility and impact toughness of wood lacquers, the applicants have added to the system a certain amount of reactive monomer.
In one embodiment, the reactive monomer comprises a hydroxyl-containing acrylate reactive monomer.
In one embodiment, the hydroxyl group-containing acrylate-based reactive monomer is selected from at least one of PO-NPGDA (propoxylated neopentyl glycol diacrylate), DPGDA (dipropylene glycol diacrylate), TPGDA (tripropylene glycol diacrylate), HDDA (1, 6-hexanediol diacrylate), TMPTA (trimethylolpropane triacrylate), TMP3POTA (propoxylated trimethylolpropane triacrylate); more preferably, the hydroxyl-containing acrylate reactive monomer is TMP3POTA (CAS number: 28961-43-5).
In a preferred embodiment, the reactive monomer further comprises an acrylate-based reactive monomer containing a phenyl group; the weight of the acrylic ester active monomer containing phenyl is 25-40% of that of the active monomer; more preferably, the weight of the acrylic ester type reactive monomer containing phenyl is 32% of the weight of the reactive monomer.
In one embodimentThe acrylic ester active monomer containing phenyl is PHEA (2-phenoxyethyl acrylate) and/or EO4-BPDA (ethoxylated bisphenol a acrylate); more preferably, the acrylate active monomer containing phenyl is PHEA (CAS number: 48145-04-6).
The applicant finds that the addition of the hydroxyl-containing acrylate active monomer in the system improves the flexibility and impact toughness of the wood lacquer, but the hardness of the wood lacquer is reduced, probably because the hydroxyl-containing acrylate active monomer is increased, so that the content of acrylic resin in the system is lower, and the number of benzene rings is reduced, and the addition of PHEA increases the content of the benzene rings in the system, so that the hardness of the wood lacquer is increased.
Photoinitiator
In one embodiment, the photoinitiator is selected from at least one of photoinitiator 1173(α -hydroxy isopropyl benzophenone), photoinitiator 184(α -hydroxy cycloethyl benzophenone), photoinitiator 819[ bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide ], photoinitiator 907[ 2-methyl-1- (4-methylthiophenyl) -2-morpholin-1-one ], photoinitiator ITX (CAS number: 5495-84-1).
In a preferred embodiment, the photoinitiator is a mixture of photoinitiator 184 and photoinitiator ITX (CAS number 5495-84-1); the weight ratio of the photoinitiator 184 to the photoinitiator ITX is (2-3): 1; further preferably, the weight ratio of the photoinitiator 184 to the photoinitiator ITX is 2.6: 1.
the photoinitiator 184 is short in curing and low in price, so the photoinitiator 184 is preferably used in the research, but the applicant finds that when the photoinitiator 184 is used, the hardness of the wood lacquer is low, and the applicant finds that when a certain amount of photoinitiator ITX is used to cooperate with the photoinitiator 184, the wood lacquer has good hardness, probably because the photoinitiator ITX has a larger absorption wavelength and a higher absorption coefficient, and the photoinitiator ITX cooperates with the photoinitiator 184, so that the curing degree of the wood lacquer is better, and the mechanical property of the wood lacquer is better.
Dispersing agent
The kind of the dispersant is not particularly limited, and the dispersants used in the acrylic resin system are all suitable for the system of the present invention.
In one embodiment, the dispersant is selected from at least one of BYK-ANTI-TERRA-250, BYK-ANTI-TERRA-203, BYK-ANTI-TERRA-U, BYK-ANTI-TERRA-U100, BYK-W996, BYK-220S, BYK-W980, BYK-W903, BYK-DISPERBYK-163; further preferably, the dispersant is BYK-220S.
When the selected dispersant is BYK-220S, the woodenware paint has better performance, probably because BYK-220S contains a small amount of polysiloxane copolymer, the performance of the woodenware paint can be improved by interaction with other components in the system to a certain extent.
Defoaming agent
In the process of preparing the wood lacquer, bubbles are generated to cause defects on the surface of a paint film, so that the attractiveness of the paint film is influenced, the quality of the paint film is greatly influenced, and in order to solve the defects, a certain amount of defoaming agent is added into a system.
In one embodiment, the defoamer is a polyether modified polysiloxane type defoamer; as the modified silicone defoaming agent, BYK-1785 and Tego-825 can be exemplified.
The polyether modified polysiloxane antifoaming agent used in the present invention is BYK-1785.
Leveling agent
In one embodiment, the leveling agent is a hydroxyl group-containing leveling agent.
As the leveling agent containing a hydroxyl group, Dow Corning DC1248, BYK-377, Dow Corning DC 29; further preferably, the leveling agent containing a hydroxyl group is Dow Corning DC 29.
The applicant finds that the surface performance of the wood lacquer is better by using the flatting agent containing the hydroxyl group in the system, probably because the flatting agent contains the hydroxyl group, and the hydroxyl group can interact with the defoaming agent to a certain extent, so that the defoaming agent particles can be better dispersed on the surface of the foam liquid film, and the defoaming effect can be more effectively exerted.
Pigment and filler
In one embodiment, the pigment and filler is talc.
The talcum powder has good lubricity, viscosity resistance and flow aid, can play a skeleton role in wood paint, reduces the cost and improves the hardness of the coating.
In one embodiment, the talc has an average particle size of at least one of 600 mesh, 800 mesh, 1250 mesh.
In a preferred embodiment, the pigment and filler is a mixture with an average particle size of 600 meshes, 800 meshes and 1250 meshes, and the weight ratio of the pigment and filler is 1: (1-1.3): (1.3-1.6); further preferably, the weight ratio of the components is 1: 1.2: 1.4.
in one embodiment, the talc powder is mordenite talc powder MONOMIX.
The applicant finds that the talcum powder with different particle sizes can be better filled in gaps of a system, so that the system has few defects when the wood lacquer is cured, and the mechanical property of the wood lacquer reaches a better value.
Matting powder
In one embodiment, the matting agent is C-906 available from Grace corporation.
The second aspect of the invention provides a preparation method of environment-friendly wood paint, which comprises the following steps: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the extinction powder at a high speed to obtain finish paint; preparing a primer: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the pigment and the filler at a high speed to obtain the primer.
In one embodiment, the wood lacquer is used by the following method: adopting spraying equipment for full-automatic coating construction, spraying a layer of primer on a wood substrate, wherein the thickness of the coating is 20-50 microns, drying for 30min at 60-80 ℃ after spraying, and then placing in an ultraviolet radiation box for curing, wherein the curing conditions are as follows: an ultraviolet lamp of 800W is arranged at a lamp distance of 15cm, and the irradiation time is 3-20 s; and slightly polishing the surface of the workpiece sprayed with the primer, spraying finish paint, leveling for 5-8 min, preheating for 30min at 50 ℃, and then placing in an ultraviolet radiation box for curing. Curing conditions are that an ultraviolet lamp is used under 800W, the lamp distance is 15cm, and the irradiation time is 3-30 s.
In one embodiment, the wood lacquer is used by the following method: adopting spraying equipment for full-automatic coating construction, spraying a layer of primer on a wood substrate, wherein the thickness of the coating is 40 microns, drying for 30min at 70 ℃ after spraying, and then placing in an ultraviolet radiation box for curing, wherein the curing conditions are as follows: an ultraviolet lamp of 800W, the lamp distance is 15cm, and the irradiation time is 8 s; and then slightly polishing the surface of the workpiece sprayed with the primer, spraying finish paint, leveling for 6min, preheating for 30min at 50 ℃, and then placing in an ultraviolet radiation box for curing. Curing conditions are 800W ultraviolet lamp, lamp distance is 15cm, and irradiation time is 15 s.
Several specific examples of the present invention are given below, but the present invention is not limited by the examples.
In addition, the starting materials in the present invention are all commercially available unless otherwise specified.
Examples
Example 1
Embodiment 1 of the invention specifically discloses an environment-friendly wood paint, which comprises a primer and a finish; the raw materials of the finish paint comprise, by weight, 50 parts of acrylic resin, 10 parts of active monomer, 4 parts of photoinitiator, 0.3 part of dispersant, 0.1 part of defoamer, 0.2 part of flatting agent and 1 part of matting powder; the primer comprises the following raw materials, by weight, 50 parts of acrylic resin, 10 parts of active monomer, 4 parts of photoinitiator, 0.6 part of dispersant, 0.1 part of defoamer, 0.2 part of flatting agent and 2 parts of pigment and filler;
the acrylic resin is a mixture of waterborne epoxy modified acrylic resin, waterborne self-crosslinking acrylic resin and waterborne acrylic resin; the weight ratio of the mixture of the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin is 2: 1.2: 1; the pH value of the waterborne epoxy modified acrylic resin is 7.0, and the viscosity of the waterborne epoxy modified acrylic resin is 1300mPa & s; the viscosity of the waterborne self-crosslinking acrylic resin is 500mPa & s; the annual viscosity of the aqueous acrylic resin is 150mPa & s;
the active monomer comprises an acrylate active monomer containing hydroxyl; the acrylate active monomer containing hydroxyl is TMP3POTA (CAS number: 28961-43-5); the active monomer also comprises an acrylate active monomer containing phenyl; the weight of the acrylic ester active monomer containing phenyl is 25 percent of that of the active monomer; the acrylic ester active monomer containing phenyl is PHEA (CAS number: 48145-04-6).
The photoinitiator is a mixture of a photoinitiator 184 and a photoinitiator ITX (CAS number: 5495-84-1); the weight ratio of the photoinitiator 184 to the photoinitiator ITX is 2: 1;
the defoaming agent is polyether modified polysiloxane defoaming agent;
the flatting agent is a flatting agent containing hydroxyl groups;
the pigment and filler is talcum powder;
the pigment and filler is a mixture with the average particle size of 600 meshes, 800 meshes and 1250 meshes, and the weight ratio of the pigment and filler is 1: 1: 1.3;
the preparation method of the wood lacquer comprises the following steps:
preparing a finish paint: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the extinction powder at a high speed to obtain finish paint;
preparing a primer: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the pigment and the filler at a high speed to obtain the primer.
The waterborne epoxy modified acrylic resin is DIC ELW-270; the waterborne self-crosslinking acrylic resin is DSM Setaqua 6716; the water-based acrylic resin is DSM Neocryl XK-84; the dispersant is BYK-220S; the polyether modified polysiloxane antifoaming agent is BYK-1785; the leveling agent containing hydroxyl groups is Dow Corning DC 29; the talcum powder is American Yirui stone talcum powder MONOMIX; the matting powder is C-906 available from Graes.
Example 2
Embodiment 2 of the invention specifically discloses an environment-friendly wood paint, which comprises a primer and a finish; the raw materials of the finish paint comprise, by weight, 70 parts of acrylic resin, 20 parts of active monomer, 6 parts of photoinitiator, 0.8 part of dispersant, 0.4 part of defoamer, 0.6 part of flatting agent and 4 parts of matting powder; the primer comprises the following raw materials, by weight, 70 parts of acrylic resin, 20 parts of active monomer, 6 parts of photoinitiator, 1 part of dispersant, 0.4 part of defoamer, 0.6 part of flatting agent and 6 parts of pigment and filler;
the acrylic resin is a mixture of waterborne epoxy modified acrylic resin, waterborne self-crosslinking acrylic resin and waterborne acrylic resin; the weight ratio of the mixture of the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin is 3: 1.5: 1; the pH value of the waterborne epoxy modified acrylic resin is 8.0, and the viscosity of the waterborne epoxy modified acrylic resin is 1600mPa & s; the viscosity of the waterborne self-crosslinking acrylic resin is 900mPa & s; the annual viscosity of the aqueous acrylic resin is 200mPa & s;
the active monomer comprises an acrylate active monomer containing hydroxyl; the acrylate active monomer containing hydroxyl is TMP3POTA (CAS number: 28961-43-5); the active monomer also comprises an acrylate active monomer containing phenyl; the weight of the acrylic ester active monomer containing phenyl is 40% of that of the active monomer; the acrylic ester active monomer containing phenyl is PHEA (CAS number: 48145-04-6);
the photoinitiator is a mixture of a photoinitiator 184 and a photoinitiator ITX (CAS number: 5495-84-1); the weight ratio of the photoinitiator 184 to the photoinitiator ITX is 3: 1;
the defoaming agent is polyether modified polysiloxane defoaming agent;
the flatting agent is a flatting agent containing hydroxyl groups;
the pigment and filler is talcum powder;
the pigment and filler is a mixture with the average particle size of 600 meshes, 800 meshes and 1250 meshes, and the weight ratio of the pigment and filler is 1: 1.3: 1.6;
the preparation method of the wood lacquer comprises the following steps:
preparing a finish paint: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the extinction powder at a high speed to obtain finish paint;
preparing a primer: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the pigment and the filler at a high speed to obtain the primer.
The waterborne epoxy modified acrylic resin is DIC ELW-270; the waterborne self-crosslinking acrylic resin is DSM Setaqua 6716; the water-based acrylic resin is DSM Neocryl XK-84; the dispersant is BYK-220S; the polyether modified polysiloxane antifoaming agent is BYK-1785; the leveling agent containing hydroxyl groups is Dow Corning DC 29; the talcum powder is American Yirui stone talcum powder MONOMIX; the matting powder is C-906 available from Graes.
Example 3
Embodiment 3 of the invention specifically discloses an environment-friendly wood paint, which comprises a primer and a finish; the raw materials of the finish paint comprise, by weight, 60 parts of acrylic resin, 15 parts of active monomer, 5 parts of photoinitiator, 0.5 part of dispersant, 0.3 part of defoamer, 0.4 part of flatting agent and 3 parts of matting powder; the primer comprises the following raw materials, by weight, 60 parts of acrylic resin, 15 parts of active monomer, 5 parts of photoinitiator, 0.8 part of dispersant, 0.3 part of defoamer, 0.4 part of flatting agent and 4 parts of pigment and filler;
the acrylic resin is a mixture of waterborne epoxy modified acrylic resin, waterborne self-crosslinking acrylic resin and waterborne acrylic resin; the weight ratio of the mixture of the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin is 2.5: 1.3: 1; the pH value of the waterborne epoxy modified acrylic resin is 8.0; the viscosity of the waterborne epoxy modified acrylic resin is 1500 a.s; the viscosity of the self-crosslinking acrylic resin is 720mPa & s; the annual viscosity of the aqueous acrylic resin is 180mPa & s;
the active monomer comprises an acrylate active monomer containing hydroxyl; the acrylate active monomer containing hydroxyl is TMP3POTA (CAS number: 28961-43-5); the active monomer also comprises an acrylate active monomer containing phenyl; the weight of the acrylic ester active monomer containing phenyl is 32 percent of that of the active monomer; the acrylic ester active monomer containing phenyl is PHEA (CAS number: 48145-04-6);
the photoinitiator is a mixture of a photoinitiator 184 and a photoinitiator ITX (CAS number: 5495-84-1); the weight ratio of the photoinitiator 184 to the photoinitiator ITX was 2.6: 1;
the defoaming agent is polyether modified polysiloxane defoaming agent;
the flatting agent is a flatting agent containing hydroxyl groups;
the pigment and filler is talcum powder;
the pigment and filler is a mixture with the average particle size of 600 meshes, 800 meshes and 1250 meshes, and the weight ratio of the pigment and filler is 1: 1.2: 1.4;
the preparation method of the wood lacquer comprises the following steps:
preparing a finish paint: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the extinction powder at a high speed to obtain finish paint;
preparing a primer: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the pigment and the filler at a high speed to obtain the primer.
The waterborne epoxy modified acrylic resin is DIC ELW-270; the waterborne self-crosslinking acrylic resin is DSM Setaqua 6716; the water-based acrylic resin is DSM Neocryl XK-84; the dispersant is BYK-220S; the polyether modified polysiloxane antifoaming agent is BYK-1785; the leveling agent containing hydroxyl groups is Dow Corning DC 29; the talcum powder is American Yirui stone talcum powder MONOMIX; the matting powder is C-906 available from Graes.
Example 4
The embodiment 4 of the invention specifically discloses an environment-friendly wood lacquer, and the specific implementation manner is the same as that in the embodiment 3, except that the viscosity of the waterborne epoxy modified acrylic resin is 500mPa · s.
Example 5
The embodiment 5 of the invention specifically discloses an environment-friendly wood lacquer, and the specific implementation manner is the same as that in the embodiment 3, except that the viscosity of the waterborne epoxy modified acrylic resin is 2500mPa · s.
Example 6
Embodiment 6 of the invention specifically discloses an environment-friendly wood lacquer, and the specific implementation manner is the same as that of embodiment 3, except that TEGO Glide 482 is used instead of Dow Corning DC 29.
Example 7
The embodiment 7 of the invention specifically discloses an environment-friendly wood lacquer, and the specific implementation manner is the same as that of the embodiment 3, except that no acrylic ester active monomer containing phenyl is used.
Example 8
Embodiment 8 of the present invention specifically discloses an environment-friendly wood lacquer, which is the same as embodiment 3 except that there is no photoinitiator ITX.
And (3) performance testing:
1. and (3) testing the adhesive force: the adhesion of the wood lacquer in some of the examples was tested according to the standard ASTM D3359, test method: marking 25 grids on the coating surface 72 hours after the coating is finished by using a 2mm grid cutter, and testing by using a 3M adhesive tape;
grade: 5B is best, 0B is worst; 5B, coating is intact; 4B, < 5% coating film damage; 3B, damaging 5-15% of the coating; 2B, damaging 5-35% of the coating; 1B, 35-55% of coating film is damaged; 0B, > 55% of the coating film was damaged.
2. And (3) hardness testing: the hardness of the woodenware paint in some of the examples was tested according to standard GB/T6739-1996. The test material is a set of Chinese high-grade drawing pencils, which have different hardness from 9H to 6B, wherein 9H is the hardest and 6B is the softest.
3. Evaluation of surface Properties: taking 100 groups of the wood lacquer in some embodiments respectively, carrying out full-automatic coating construction by using a spraying device, spraying a layer of primer on a wood substrate, wherein the thickness of the coating is 40 micrometers, drying for 30min at 70 ℃ after spraying, and then placing in an ultraviolet radiation box for curing, wherein the curing conditions are as follows: an ultraviolet lamp of 800W, the lamp distance is 15cm, and the irradiation time is 8 s; and then slightly polishing the surface of the workpiece sprayed with the primer, spraying finish paint, leveling for 6min, preheating for 30min at 50 ℃, and then placing in an ultraviolet radiation box for curing. Curing conditions are that an ultraviolet lamp with the lamp distance of 15cm is used under the condition of 800W, the irradiation time is 15s, and then the phenomena of surface shrinkage, uneven coating and foaming are observed.
Evaluation criteria: more than or equal to 95 groups have no surface shrinkage cavity, uneven coating and foaming phenomena, and the surface performance is grade 1; more than or equal to 80 groups, and less than 95 groups have no surface shrinkage cavity, uneven coating and foaming phenomena, and the surface performance is 2 grade; more than or equal to 65 groups, less than 80 groups have no surface shrinkage cavity, uneven coating and foaming phenomena, and the surface performance is grade 3; and the group less than 65 has no surface shrinkage cavity, uneven coating and foaming phenomena, and the surface performance is grade 4.
The test results are shown in table 1:
TABLE 1
From the test results of table 1, it can be seen that the wood lacquer of the present invention has good hardness and adhesion, and the painted surface after coating construction has good appearance.
The foregoing examples are merely illustrative and are provided to illustrate some of the features of the methods of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (7)
1. An environment-friendly wood paint is characterized by comprising a primer and a finish; the finishing paint comprises the following raw materials, by weight, 50-70 parts of acrylic resin, 10-20 parts of active monomer, 4-6 parts of photoinitiator, 0.3-0.8 part of dispersant, 0.1-0.4 part of defoamer, 0.2-0.6 part of flatting agent and 1-4 parts of matting powder;
the primer comprises the following raw materials, by weight, 50-70 parts of acrylic resin, 10-20 parts of active monomer, 4-6 parts of photoinitiator, 0.6-1 part of dispersant, 0.1-0.4 part of defoamer, 0.2-0.6 part of flatting agent and 2-6 parts of pigment and filler; the acrylic resin is a mixture of waterborne epoxy modified acrylic resin, waterborne self-crosslinking acrylic resin and waterborne acrylic resin; the viscosity of the waterborne epoxy modified acrylic resin is 1000-2000 mPa & s; the viscosity of the waterborne self-crosslinking acrylic resin is 500-900 mPa & s; the viscosity of the water-based acrylic resin is 150-200 mPa & s; the weight ratio of the mixture of the waterborne epoxy modified acrylic resin, the waterborne self-crosslinking acrylic resin and the waterborne acrylic resin is (2-3): (1.2-1.5): 1;
the leveling agent is a leveling agent containing hydroxyl groups.
2. The environment-friendly wood lacquer according to claim 1, wherein the reactive monomer comprises an acrylate reactive monomer containing a hydroxyl group.
3. The environment-friendly wood lacquer according to claim 2, wherein the reactive monomer further comprises an acrylate reactive monomer containing a phenyl group.
4. An environment-friendly wood lacquer according to claim 1 or 2, wherein the photoinitiator is selected from at least one of photoinitiator 1173, photoinitiator 184, photoinitiator 819, photoinitiator 907 and photoinitiator ITX.
5. The environment-friendly wood lacquer according to claim 1 or 2, wherein the defoaming agent is polyether modified polysiloxane defoaming agent.
6. The environment-friendly wood lacquer according to claim 1 or 2, wherein the pigment and filler is talc.
7. The preparation method of the environment-friendly wood paint as claimed in any one of claims 1 to 6, wherein the preparation of the top paint comprises the following steps: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the extinction powder at a high speed to obtain finish paint;
preparing a primer: uniformly mixing acrylic resin, an active monomer and a photoinitiator, adding a dispersing agent, a defoaming agent and a flatting agent, uniformly mixing, and then uniformly dispersing the pigment and the filler at a high speed to obtain the primer.
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Denomination of invention: An environment-friendly wood paint and its preparation method Effective date of registration: 20221101 Granted publication date: 20220201 Pledgee: Agricultural Bank of China Limited Shanghai Yangtze River Delta Integrated Demonstration Zone Sub branch Pledgor: SHANGHAI JUNZILAN NEW MATERIAL Co.,Ltd. Registration number: Y2022310000307 |
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