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CN112625520B - Water-based paint composition and preparation method thereof - Google Patents

Water-based paint composition and preparation method thereof Download PDF

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Publication number
CN112625520B
CN112625520B CN202011356566.XA CN202011356566A CN112625520B CN 112625520 B CN112625520 B CN 112625520B CN 202011356566 A CN202011356566 A CN 202011356566A CN 112625520 B CN112625520 B CN 112625520B
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agent
parts
component
coating
fiber
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CN112625520A (en
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刘凯琳
杨钰莹
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GUANGDONG FUDUO NEW MATERIAL Co.,Ltd.
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Guangdong Fuduo New Material Co ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/65Additives macromolecular
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/70Additives characterised by shape, e.g. fibres, flakes or microspheres
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/002Physical properties
    • C08K2201/004Additives being defined by their length
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/002Physical properties
    • C08K2201/005Additives being defined by their particle size in general
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/14Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16Fibres; Fibrils

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention belongs to the technical field of coatings, and particularly relates to a water-based coating composition and a preparation method thereof, wherein the water-based coating composition comprises a component A and a component B; the component A is coated on a wood substrate; the component B is coated on the surface of the component A; the water-based paint composition comprises the following raw materials: 30-50 parts of water-based polyacrylic acid emulsion, 10-15 parts of pigment, 4-6 parts of first reinforced fiber (glass fiber), 6-8 parts of second reinforced fiber (polyurethane fiber), 3-5 parts of silane coupling agent, 4-6 parts of waterproof agent, 3-5 parts of flame retardant, 3-5 parts of dispersing agent, 2-3 parts of curing agent, 2-3 parts of defoaming agent, 1-2 parts of wetting agent, 1-1.5 parts of drying agent, 0.5-0.8 part of light-cured resin and 0.8-1.2 parts of anti-freezing agent; the coating prepared by the invention can improve the strength of the cured coating on the surface of the wood furniture, the tightness degree of the coating combined with wood and the slight impact resistance, and the strengthened coating does not affect the surface grinding and polishing treatment of the coating and increase the treatment difficulty.

Description

Water-based paint composition and preparation method thereof
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a water-based coating composition and a preparation method thereof.
Background
The wood is a natural biological material, is an important raw material for human survival and development, is widely applied to industries such as industry, civil buildings, furniture, decoration and the like, and the furniture coating can enable the wooden furniture to be more beautiful and beautiful, improve the rough hand feeling of the wood, enable the furniture not to be influenced by the change of climate and humidity, protect and maintain the wooden furniture, and improve the beautiful degree of the wooden furniture to enable the whole family life to be more comfortable. In the existing manufacturing process of wood furniture, when the surface of furniture is coated with paint, wood chips, dust and impurities such as hair easily falling off from an operator body exist in the working environment, and the impurities fall on the surface of a coating formed by the paint to cause the surface of the coating to have dirt and dent defects.
Disclosure of Invention
In order to make up for the defects of the prior art, improve the strength of a film layer after the surface coating of the wood furniture is cured, the tightness degree of the film layer and the wood combination and the slight impact resistance, ensure that the strengthened film layer does not influence the surface grinding and polishing treatment of the film layer, and increase the treatment difficulty, the invention provides the water-based coating composition and the preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a water-based paint composition and a preparation method thereof, wherein the water-based paint composition comprises a component A and a component B; the component A is coated on a wood substrate; the component B is coated on the surface of the component A; the water-based paint composition comprises the following raw materials:
30-50 parts of water-based polyacrylic acid emulsion, 10-15 parts of pigment, 4-6 parts of first reinforced fiber (glass fiber), 6-8 parts of second reinforced fiber (polyurethane fiber), 3-5 parts of silane coupling agent, 4-6 parts of waterproof agent, 3-5 parts of flame retardant, 3-5 parts of dispersing agent, 2-3 parts of curing agent, 2-3 parts of defoaming agent, 1-2 parts of wetting agent, 1-1.5 parts of drying agent, 0.5-0.8 part of light-cured resin and 0.8-1.2 parts of anti-freezing agent;
the preparation method of the water-based paint composition comprises the following steps:
s1: adding the water-based polyacrylic acid emulsion into a stirring kettle, sequentially adding a dispersing agent, a defoaming agent, a wetting agent, a pigment, a curing agent and an antifreeze agent under a stirring state, and fully stirring and mixing to obtain a base material;
s2: adding 2/3 of the base material obtained in the step S1 into a stirring kettle, sequentially adding 2/3 waterproof agent, 2/3 flame retardant, drying agent, light-cured resin, first reinforcing fiber and 2/3 second reinforcing fiber under a stirring state, and fully and uniformly mixing to obtain a component A;
s3: adding 1/3 of the base material obtained in the step S1 into a stirring kettle, sequentially adding 1/3 waterproof agent, 1/3 flame retardant, 1/3 second reinforcing fiber and silane coupling agent under stirring, and fully and uniformly mixing to obtain a component B;
wherein, the first reinforcing fiber and the second reinforcing fiber are added in the component A, so that the adhesive force between the coating coated on the surface of the wood furniture and the surface of the wood furniture is increased, the phenomenon that the coating fails due to falling of a protective film layer formed by curing the coating in the use process is avoided, meanwhile, the strength and toughness of the protective film layer formed by curing the coating can be improved through the added first reinforcing fiber and the added second reinforcing fiber, the protective film layer on the surface of the wood furniture can bear slight collision or extrusion in the use process, the damage of the protective film layer is avoided, the protective effect is influenced, the aesthetic degree is reduced, meanwhile, the component A and the component B can be tightly combined after coating by simultaneously adding the second reinforcing fiber in the component A and the component B, the phenomenon that the component A and the component B are layered in the use process to cause the skinning phenomenon on the surface of the protective film layer is avoided, the attractive degree is influenced, the thickness of a protective film layer is weak, the protective effect is influenced, meanwhile, after the component B is coated on the surface of the component A, the coupling agent added in the component B can improve the bonding strength between the component B and the component A, the layering between the component B and the component A is avoided, meanwhile, the coating is divided into A, B components, the protective film layer on the surface of the wood furniture can be ensured to be relatively divided into two layers, in the coating process on the surface of the wood furniture, sawdust, dust and hair fall on the surface of the coating, when the surface of the coating after being cured has defects, the coating on the surface of the wood furniture is convenient to polish, the parts with the defects on the surface of the coating are polished, the protective effect of the whole coating on the wood furniture is not influenced, meanwhile, the relatively outer coating formed by curing the component B can be polished, the glossiness of the surface of the furniture can be further improved, the appearance aesthetic degree of the wood furniture is improved, the value of the wood furniture is improved, and meanwhile, the problem that the protective effect of the film layer is invalid or greatly reduced because the traditional water-based coating composition only forms a single film layer on the surface of the wood furniture on the premise of removing the surface defects of the film layer and improving the glossiness and the aesthetic degree of the surface of the film layer is solved by grinding and polishing the film layer formed by curing the component B;
the pigment is fully ground before use, and the average particle size of the ground pigment particles is 5-8 mu m; the dispersing agent is sodium dodecyl sulfate; the waterproof agent is a 60% polytetrafluoroethylene concentrated dispersion; the flame retardant is micro powder obtained by grinding magnesium-aluminum hydrotalcite (the chemical molar ratio of Mg to Al is 1: 1-4), and the average particle size of the micro powder is 5-8 mu m; the curing agent is water-based isocyanate; the wetting agent is a silanol nonionic surfactant; the defoaming agent is an organic silicon defoaming agent; the antifreeze agent is sodium acetate trihydrate;
when the coating is in use, the waterproof agent added into the coating can improve the waterproof effect of a protective film layer on the surface of wood furniture, meanwhile, the magnalium hydrotalcite micro powder added into the coating as a flame retardant is heated and decomposed when a fire occurs, and the generated magnesium element and aluminum element react with oxygen in the air to generate a compact magnesium oxide and aluminum oxide ceramic structure which is attached to the surface of the wood furniture to isolate flame, reduce the oxygen concentration at the combustion position, generate a certain fireproof effect, delay the spread of the fire and reduce loss, meanwhile, the antifreeze agent added into the coating can store and release heat, slow down the temperature change speed of the film layer formed after the coating is cured and reduce the temperature change range of the film layer to a certain extent, reduce the influence of the film layer caused by temperature change, and prevent the film layer from cracking when the temperature change is fast and the amplitude is large, affecting the protective effect of the film.
Preferably, the first reinforcing fibers are chopped glass fibers; the length of the chopped glass fiber is 0.1-0.13 mm; the second reinforcing fibers are chopped polyurethane fibers; the length of the chopped polyurethane fiber is 0.18-0.21 mm; the short-cut polyurethane fiber is superfine denier fiber;
during operation, the strength of the coating is effectively improved within a certain range through the chopped glass fibers added in the coating, so that the strength of a protective film layer obtained after the coating is cured is higher, the possibility of damage of the film layer is reduced, the service life of the coating is prolonged, meanwhile, the toughness of the coating is relatively improved under the condition that the strength of the coating is ensured through the added chopped polyurethane fibers in the use process, the coating is not directly damaged after being collided by external force, a slight deformation range can exist, the bearing capacity of the film layer to slight collision is reduced, the direct damage and falling off of the film layer after being collided are avoided, the coating is not damaged, meanwhile, in the use process, the chopped glass fibers and the chopped polyurethane fibers with different lengths can be used, the chopped glass fibers and the chopped polyurethane fibers with different lengths can be prevented from each other, and the mixing uniformity of the chopped glass fibers and the chopped polyurethane fibers in the coating is improved, the chopped glass fiber and the chopped polyurethane fiber which are uniformly distributed in the coating form a layer of latticed structure, so that the strength of the coating is further improved, and meanwhile, because the chopped polyurethane fiber is only added in the component B, after the coating is cured, the surface of wood furniture is polished and polished, so that defects are eliminated, the glossiness and the attractiveness are improved, the polishing difficulty of the component B curing forming film layer is reduced, the polishing speed is increased, and the polishing efficiency is improved.
Preferably, in the preparation process of the chopped polyurethane fiber, 5-8% of superfine magnetic powder in parts by mass is mixed into the raw material polyurethane, and the superfine denier polyurethane fiber is prepared in a melt spinning mode; after the short-cut polyurethane fiber is prepared, carrying out high-temperature heat treatment for 3-5S; after the short-cut polyurethane fiber is subjected to heat treatment, the two ends of the short-cut polyurethane fiber are slightly curled, and the whole fiber is arc-shaped;
during operation, through sneaking into superfine magnetic powder in the polyurethane fiber of cutting short, can make and to have certain mutual appeal between the polyurethane fiber of cutting short, and simultaneously, because the polyurethane fiber of cutting short is after the heat treatment, wholly be the arc, slight curling appears at both ends, after sneaking into in the coating, the trend of gathering appears in the influence that the polyurethane fiber of cutting short received the superfine magnetic powder of sneaking into, under the curling at polyurethane fiber both ends of cutting short and the arc effect of self, contact appears between the polyurethane fiber of cutting short and the chopped glass fiber, collude and link, form similar "blending" effect, promote the stability and the compact degree of both grid structures that form in the coating, promote the structural strength of rete, make the intensity of rete higher, reduce the impaired possibility of rete, prolong the life of coating.
Preferably, when the water-based coating composition is used, the component A is firstly coated on the surface of wood; after the component A is coated, coating the component B on the surface of the component A; after the component B is coated, carrying out short-time irradiation by using an ultraviolet lamp, wherein the irradiation time is 5-10 min;
when the coating is in work, a trace of light-cured resin is added in the component A, after the component A and the component B are coated, ultraviolet rays are used for irradiating, the trace of light-cured resin in the component A can be promoted to complete crosslinking and curing, so that the coating coated on the surface of the wood furniture generates a certain relatively stable integral structure and shape, the complete curing of the whole coating is waited, the phenomenon that after the coating on the surface of the wood furniture is coated, the coating cannot rapidly form a relatively stable cured surface or integral structure, the coating is hung under the influence of gravity, the coating effect of the coating and the attractiveness of the furniture are influenced, and the subsequent polishing workload is increased.
Preferably, 1/3 of the water repellent and 1/3 of the flame retardant added in the step S3 are added after being encapsulated by microcapsules; the microcapsule wrapping the waterproof agent and the flame retardant is prepared from photo-disintegrating gel; the average grain diameter of the microcapsule wrapped with the waterproof agent or the flame retardant is 15-18 mu m;
when the coating is in work, the waterproof agent and the flame retardant are wrapped by the microcapsule, so that the waterproof agent and the flame retardant in the component B can be distributed more uniformly, meanwhile, the material for preparing the micro-gel is light disintegration gel, after the component A and the component B are coated, the microcapsule can be disintegrated when being irradiated by ultraviolet light, so that the waterproof agent and the flame retardant loaded in the microcapsule are released into the coating obtained by coating the component B, the waterproof agent and the flame retardant effect of the coating formed by the component B are improved, meanwhile, the microcapsule bearing the waterproof agent and the flame retardant are disintegrated under the irradiation of the ultraviolet light, so that the waterproof agent and the flame retardant are released into the coating formed by the component B, meanwhile, the released fireproof agent and the flame retardant are micro particles with agglomeration tendency in the coating, and the structure of the coating of the component B can be damaged to a certain extent, the difficulty of grinding and polishing the coating B is reduced, and the surface polishing of the coating B is facilitated.
Preferably, the drying agent is a microcapsule prepared by wrapping silica gel micropowder with photo-disintegrating gel; the average particle size of the silica gel micro powder is 6-10 μm; drying the microcapsule coated with the silica gel micro powder, putting the microcapsule into 60% of polytetrafluoroethylene concentrated dispersion liquid, soaking for 10min, taking out and drying to obtain a usable drying agent; before the microcapsule is put into 60 percent concentration dispersion liquid of polytetrafluoroethylene for soaking, a KH-560 coupling agent is sprayed on the surface; the coupling agent on the surface of the microcapsule is primarily dried, and the microcapsule is soaked after the surface of the microcapsule has no moist feeling and the microcapsules are not adhered;
during operation, through adding the drying agent in the A component, can adsorb the steam of timber furniture surface release in the coating process, when avoiding the water content in the timber furniture slightly high, release more steam in the coating curing process, lead to the coating on timber furniture surface to appear discolouring, the tympanic bulla defect, lead to timber furniture coating to apply paint the effect not good, influence the aesthetic measure of furniture, simultaneously, use polytetrafluoroethylene 60% concentrated dispersion to soak before the microcapsule adds the A component, make the microcapsule surface form the hydrophobic membrane layer, avoid adding the drying agent in the A component in coating storage and transportation process, absorb the moisture that exists in the A component, lead to the drying agent inefficacy, and the A component is rotten, influence the normal use of coating.
The invention has the following beneficial effects:
1. according to the water-based coating composition and the preparation method thereof, A, B components are used, two film layers can be formed on the surface of wood furniture, and the film layers formed by curing the component B can be ground and polished, so that the problems that the traditional water-based coating composition only forms a single film layer on the surface of the wood furniture, the film layer is easy to damage during grinding and polishing, and the protection effect of the film layer is ineffective or greatly reduced on the premise that the surface defects of the film layer are removed and the glossiness and the attractiveness of the surface of the film layer are improved are solved.
2. According to the water-based paint composition and the preparation method thereof, a small amount of light-cured resin is added into the component A, the water-proofing agent and the fire retardant are wrapped by the light-disintegrating gel in the component B, and ultraviolet light is used for irradiating during construction, so that a basic structural network is quickly formed in a paint layer, the integral shape of the paint layer is guaranteed not to be greatly changed, the sagging phenomenon is avoided, meanwhile, the included water-proofing agent and the fire retardant are released, the compactness of a film layer formed by the component B is relatively reduced, the film layer is conveniently ground and polished, and the attractiveness of home furnishing is improved.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method for preparing an aqueous coating composition of the present invention;
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in figure 1, the invention relates to a water-based paint composition and a preparation method thereof, wherein the water-based paint composition comprises a component A and a component B; the component A is coated on a wood substrate; the component B is coated on the surface of the component A; the water-based paint composition comprises the following raw materials:
30-50 parts of water-based polyacrylic acid emulsion, 10-15 parts of pigment, 4-6 parts of first reinforced fiber (glass fiber), 6-8 parts of second reinforced fiber (polyurethane fiber), 3-5 parts of silane coupling agent, 4-6 parts of waterproof agent, 3-5 parts of flame retardant, 3-5 parts of dispersing agent, 2-3 parts of curing agent, 2-3 parts of defoaming agent, 1-2 parts of wetting agent, 1-1.5 parts of drying agent, 0.5-0.8 part of light-cured resin and 0.8-1.2 parts of anti-freezing agent;
the preparation method of the water-based paint composition comprises the following steps:
s1: adding the water-based polyacrylic acid emulsion into a stirring kettle, sequentially adding a dispersing agent, a defoaming agent, a wetting agent, a pigment, a curing agent and an antifreeze agent under a stirring state, and fully stirring and mixing to obtain a base material;
s2: adding 2/3 of the base material obtained in the step S1 into a stirring kettle, sequentially adding 2/3 waterproof agent, 2/3 flame retardant, drying agent, light-cured resin, first reinforcing fiber and 2/3 second reinforcing fiber under a stirring state, and fully and uniformly mixing to obtain a component A;
s3: adding 1/3 of the base material obtained in the step S1 into a stirring kettle, sequentially adding 1/3 waterproof agent, 1/3 flame retardant, 1/3 second reinforcing fiber and silane coupling agent under stirring, and fully and uniformly mixing to obtain a component B;
wherein, the first reinforcing fiber and the second reinforcing fiber are added in the component A, so that the adhesive force between the coating coated on the surface of the wood furniture and the surface of the wood furniture is increased, the phenomenon that the coating fails due to falling of a protective film layer formed by curing the coating in the use process is avoided, meanwhile, the strength and toughness of the protective film layer formed by curing the coating can be improved through the added first reinforcing fiber and the added second reinforcing fiber, the protective film layer on the surface of the wood furniture can bear slight collision or extrusion in the use process, the damage of the protective film layer is avoided, the protective effect is influenced, the aesthetic degree is reduced, meanwhile, the component A and the component B can be tightly combined after coating by simultaneously adding the second reinforcing fiber in the component A and the component B, the phenomenon that the component A and the component B are layered in the use process to cause the skinning phenomenon on the surface of the protective film layer is avoided, the attractive degree is influenced, the thickness of a protective film layer is weak, the protective effect is influenced, meanwhile, after the component B is coated on the surface of the component A, the coupling agent added in the component B can improve the bonding strength between the component B and the component A, the layering between the component B and the component A is avoided, meanwhile, the coating is divided into A, B components, the protective film layer on the surface of the wood furniture can be ensured to be relatively divided into two layers, in the coating process on the surface of the wood furniture, sawdust, dust and hair fall on the surface of the coating, when the surface of the coating after being cured has defects, the coating on the surface of the wood furniture is convenient to polish, the parts with the defects on the surface of the coating are polished, the protective effect of the whole coating on the wood furniture is not influenced, meanwhile, the relatively outer coating formed by curing the component B can be polished, the glossiness of the surface of the furniture can be further improved, the appearance aesthetic degree of the wood furniture is improved, the value of the wood furniture is improved, and meanwhile, the problem that the protective effect of the film layer is invalid or greatly reduced because the traditional water-based coating composition only forms a single film layer on the surface of the wood furniture on the premise of removing the surface defects of the film layer and improving the glossiness and the aesthetic degree of the surface of the film layer is solved by grinding and polishing the film layer formed by curing the component B;
the pigment is fully ground before use, and the average particle size of the ground pigment particles is 5-8 mu m; the dispersing agent is sodium dodecyl sulfate; the waterproof agent is a 60% polytetrafluoroethylene concentrated dispersion; the flame retardant is micro powder obtained by grinding magnesium-aluminum hydrotalcite (the chemical molar ratio of Mg to Al is 1: 1-4), and the average particle size of the micro powder is 5-8 mu m; the curing agent is water-based isocyanate; the wetting agent is a silanol nonionic surfactant; the defoaming agent is an organic silicon defoaming agent; the antifreeze agent is sodium acetate trihydrate;
when the coating is in use, the waterproof agent added into the coating can improve the waterproof effect of a protective film layer on the surface of wood furniture, meanwhile, the magnalium hydrotalcite micro powder added into the coating as a flame retardant is heated and decomposed when a fire occurs, and the generated magnesium element and aluminum element react with oxygen in the air to generate a compact magnesium oxide and aluminum oxide ceramic structure which is attached to the surface of the wood furniture to isolate flame, reduce the oxygen concentration at the combustion position, generate a certain fireproof effect, delay the spread of the fire and reduce loss, meanwhile, the antifreeze agent added into the coating can store and release heat, slow down the temperature change speed of the film layer formed after the coating is cured and reduce the temperature change range of the film layer to a certain extent, reduce the influence of the film layer caused by temperature change, and prevent the film layer from cracking when the temperature change is fast and the amplitude is large, affecting the protective effect of the film.
As an embodiment of the present invention, the first reinforcing fibers are chopped glass fibers; the length of the chopped glass fiber is 0.1-0.13 mm; the second reinforcing fibers are chopped polyurethane fibers; the length of the chopped polyurethane fiber is 0.18-0.21 mm; the short-cut polyurethane fiber is superfine denier fiber;
during operation, the strength of the coating is effectively improved within a certain range through the chopped glass fibers added in the coating, so that the strength of a protective film layer obtained after the coating is cured is higher, the possibility of damage of the film layer is reduced, the service life of the coating is prolonged, meanwhile, the toughness of the coating is relatively improved under the condition that the strength of the coating is ensured through the added chopped polyurethane fibers in the use process, the coating is not directly damaged after being collided by external force, a slight deformation range can exist, the bearing capacity of the film layer to slight collision is reduced, the direct damage and falling off of the film layer after being collided are avoided, the coating is not damaged, meanwhile, in the use process, the chopped glass fibers and the chopped polyurethane fibers with different lengths can be used, the chopped glass fibers and the chopped polyurethane fibers with different lengths can be prevented from each other, and the mixing uniformity of the chopped glass fibers and the chopped polyurethane fibers in the coating is improved, the chopped glass fiber and the chopped polyurethane fiber which are uniformly distributed in the coating form a layer of latticed structure, so that the strength of the coating is further improved, and meanwhile, because the chopped polyurethane fiber is only added in the component B, after the coating is cured, the surface of wood furniture is polished and polished, so that defects are eliminated, the glossiness and the attractiveness are improved, the polishing difficulty of the component B curing forming film layer is reduced, the polishing speed is increased, and the polishing efficiency is improved.
As an embodiment of the invention, in the preparation process of the chopped polyurethane fiber, 5-8% by mass of superfine magnetic powder is mixed into the raw material polyurethane, and the superfine denier polyurethane fiber is prepared in a melt spinning mode; after the short-cut polyurethane fiber is prepared, carrying out high-temperature heat treatment for 3-5S; after the short-cut polyurethane fiber is subjected to heat treatment, the two ends of the short-cut polyurethane fiber are slightly curled, and the whole fiber is arc-shaped;
during operation, through sneaking into superfine magnetic powder in the polyurethane fiber of cutting short, can make and to have certain mutual appeal between the polyurethane fiber of cutting short, and simultaneously, because the polyurethane fiber of cutting short is after the heat treatment, wholly be the arc, slight curling appears at both ends, after sneaking into in the coating, the trend of gathering appears in the influence that the polyurethane fiber of cutting short received the superfine magnetic powder of sneaking into, under the curling at polyurethane fiber both ends of cutting short and the arc effect of self, contact appears between the polyurethane fiber of cutting short and the chopped glass fiber, collude and link, form similar "blending" effect, promote the stability and the compact degree of both grid structures that form in the coating, promote the structural strength of rete, make the intensity of rete higher, reduce the impaired possibility of rete, prolong the life of coating.
As an embodiment of the invention, when the water-based coating composition is used, the component A is firstly coated on the surface of wood; after the component A is coated, coating the component B on the surface of the component A; after the component B is coated, carrying out short-time irradiation by using an ultraviolet lamp, wherein the irradiation time is 5-10 min;
when the coating is in work, a trace of light-cured resin is added in the component A, after the component A and the component B are coated, ultraviolet rays are used for irradiating, the trace of light-cured resin in the component A can be promoted to complete crosslinking and curing, so that the coating coated on the surface of the wood furniture generates a certain relatively stable integral structure and shape, the complete curing of the whole coating is waited, the phenomenon that after the coating on the surface of the wood furniture is coated, the coating cannot rapidly form a relatively stable cured surface or integral structure, the coating is hung under the influence of gravity, the coating effect of the coating and the attractiveness of the furniture are influenced, and the subsequent polishing workload is increased.
In one embodiment of the present invention, the 1/3 water repellent and 1/3 flame retardant added in step S3 are added after being microencapsulated; the microcapsule wrapping the waterproof agent and the flame retardant is prepared from photo-disintegrating gel; the average grain diameter of the microcapsule wrapped with the waterproof agent or the flame retardant is 15-18 mu m;
when the coating is in work, the waterproof agent and the flame retardant are wrapped by the microcapsule, so that the waterproof agent and the flame retardant in the component B can be distributed more uniformly, meanwhile, the material for preparing the micro-gel is light disintegration gel, after the component A and the component B are coated, the microcapsule can be disintegrated when being irradiated by ultraviolet light, so that the waterproof agent and the flame retardant loaded in the microcapsule are released into the coating obtained by coating the component B, the waterproof agent and the flame retardant effect of the coating formed by the component B are improved, meanwhile, the microcapsule bearing the waterproof agent and the flame retardant are disintegrated under the irradiation of the ultraviolet light, so that the waterproof agent and the flame retardant are released into the coating formed by the component B, meanwhile, the released fireproof agent and the flame retardant are micro particles with agglomeration tendency in the coating, and the structure of the coating of the component B can be damaged to a certain extent, the difficulty of grinding and polishing the coating B is reduced, and the surface polishing of the coating B is facilitated.
As an embodiment of the invention, the drying agent is a microcapsule prepared by wrapping silica gel micropowder with light-disintegrating gel; the average particle size of the silica gel micro powder is 6-10 μm; drying the microcapsule coated with the silica gel micro powder, putting the microcapsule into 60% of polytetrafluoroethylene concentrated dispersion liquid, soaking for 10min, taking out and drying to obtain a usable drying agent; before the microcapsule is put into 60 percent concentration dispersion liquid of polytetrafluoroethylene for soaking, a KH-560 coupling agent is sprayed on the surface; the coupling agent on the surface of the microcapsule is primarily dried, and the microcapsule is soaked after the surface of the microcapsule has no moist feeling and the microcapsules are not adhered;
during operation, through adding the drying agent in the A component, can adsorb the steam of timber furniture surface release in the coating process, when avoiding the water content in the timber furniture slightly high, release more steam in the coating curing process, lead to the coating on timber furniture surface to appear discolouring, the tympanic bulla defect, lead to timber furniture coating to apply paint the effect not good, influence the aesthetic measure of furniture, simultaneously, use polytetrafluoroethylene 60% concentrated dispersion to soak before the microcapsule adds the A component, make the microcapsule surface form the hydrophobic membrane layer, avoid adding the drying agent in the A component in coating storage and transportation process, absorb the moisture that exists in the A component, lead to the drying agent inefficacy, and the A component is rotten, influence the normal use of coating.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. An aqueous coating composition characterized by: the water-based coating composition comprises a component A and a component B; the component A is coated on a wood substrate; the component B is coated on the surface of the component A; the water-based paint composition comprises the following raw materials:
30-50 parts of water-based polyacrylic acid emulsion, 10-15 parts of pigment, 4-6 parts of first reinforced fiber, 6-8 parts of second reinforced fiber, 3-5 parts of silane coupling agent, 4-6 parts of waterproof agent, 3-5 parts of flame retardant, 3-5 parts of dispersing agent, 2-3 parts of curing agent, 2-3 parts of defoaming agent, 1-2 parts of wetting agent, 1-1.5 parts of drying agent, 0.5-0.8 part of light-cured resin and 0.8-1.2 parts of antifreeze agent;
the preparation method of the water-based paint composition comprises the following steps:
s1: adding the water-based polyacrylic acid emulsion into a stirring kettle, sequentially adding a dispersing agent, a defoaming agent, a wetting agent, a pigment, a curing agent and an antifreeze agent under a stirring state, and fully stirring and mixing to obtain a base material;
s2: adding 2/3 of the base material obtained in the step S1 into a stirring kettle, sequentially adding 2/3 waterproof agent, 2/3 flame retardant, drying agent, light-cured resin, first reinforcing fiber and 2/3 second reinforcing fiber under a stirring state, and fully and uniformly mixing to obtain a component A;
s3: adding 1/3 of the base material obtained in the step S1 into a stirring kettle, sequentially adding 1/3 waterproof agent, 1/3 flame retardant, 1/3 second reinforcing fiber and silane coupling agent under stirring, and fully and uniformly mixing to obtain a component B;
the pigment is fully ground before use, and the average particle size of the ground pigment particles is 5-8 mu m; the dispersing agent is sodium dodecyl sulfate; the waterproof agent is a 60% polytetrafluoroethylene concentrated dispersion; the flame retardant is magnesium-aluminum hydrotalcite, the chemical molar ratio of Mg to Al is 1: 1-4, and the flame retardant is micro powder obtained by grinding, wherein the average particle size of the micro powder is 5-8 mu m; the curing agent is water-based isocyanate; the wetting agent is a silanol nonionic surfactant; the defoaming agent is an organic silicon defoaming agent; the antifreeze agent is sodium acetate trihydrate;
the first reinforcing fibers are chopped glass fibers; the length of the chopped glass fiber is 0.1-0.13 mm; the second reinforcing fibers are chopped polyurethane fibers; the length of the chopped polyurethane fiber is 0.18-0.21 mm; the short-cut polyurethane fiber is superfine denier fiber;
in the preparation process of the chopped polyurethane fiber, 5-8% of superfine magnetic powder in parts by mass is mixed into the raw material polyurethane, and the superfine denier polyurethane fiber is prepared in a melt spinning mode; after the short-cut polyurethane fiber is prepared, carrying out high-temperature heat treatment for 3-5S; after the short-cut polyurethane fiber is subjected to heat treatment, the two ends of the short-cut polyurethane fiber are slightly curled, and the whole fiber is arc-shaped.
2. An aqueous coating composition according to claim 1, characterized in that: when the water-based paint composition is used, the component A is coated on the surface of wood; after the component A is coated, coating the component B on the surface of the component A; and after the component B is coated, carrying out short-time irradiation by using an ultraviolet lamp for 5-10 min.
3. An aqueous coating composition according to claim 2, wherein: the 1/3 waterproof agent added in the step S3 and the 1/3 flame retardant are added after being wrapped by microcapsules; the microcapsule wrapping the waterproof agent and the flame retardant is prepared from photo-disintegrating gel; the average grain diameter of the microcapsule wrapped with the waterproof agent or the flame retardant is 15-18 mu m.
4. An aqueous coating composition according to claim 1, characterized in that: the drying agent is a microcapsule prepared by wrapping silica gel micropowder with photo-disintegrating gel; the average particle size of the silica gel micro powder is 6-10 μm; drying the microcapsule coated with the silica gel micro powder, putting the microcapsule into 60% of polytetrafluoroethylene concentrated dispersion liquid, soaking for 10min, taking out and drying to obtain a usable drying agent; before the microcapsule is put into 60 percent concentration dispersion liquid of polytetrafluoroethylene for soaking, a KH-560 coupling agent is sprayed on the surface; and (3) primarily drying the coupling agent on the surfaces of the microcapsules, and soaking the microcapsules after the surfaces of the microcapsules have no moist feeling and the microcapsules are not adhered.
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CN106827733A (en) * 2017-01-03 2017-06-13 慈溪青雀休闲用品有限公司 fire retardant tent
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