CN110862740B - Water-based marking emulsion and coating containing same - Google Patents
Water-based marking emulsion and coating containing same Download PDFInfo
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- CN110862740B CN110862740B CN201810981892.6A CN201810981892A CN110862740B CN 110862740 B CN110862740 B CN 110862740B CN 201810981892 A CN201810981892 A CN 201810981892A CN 110862740 B CN110862740 B CN 110862740B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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Abstract
The invention discloses a water-based marking emulsion and a water-based marking coating containing the same, wherein the water-based marking emulsion comprises the following components in parts by weight: 10-42 parts of epoxy resin, 0.2-2 parts of methacrylic acid, 0.2-2 parts of methyl methacrylate, 0.2-2 parts of butyl acrylate, 2.5-6 parts of emulsifier, 0.01-0.05 part of initiator and 50-80 parts of water. In the aqueous marked line emulsion, the epoxy resin component is dispersed in the colloidal particles of methacrylic acid, methyl methacrylate and butyl acrylate in a form similar to a 'core-shell' structure. The water-based marked line emulsion and the water-soluble epoxy curing agent are mixed and stirred, the water-soluble epoxy curing agent is dissolved in the water phase of the composite emulsion, epoxy resin in the water-based marked line emulsion diffuses out colloidal particles in the film forming process, the colloidal particles are contacted with the water-soluble epoxy curing agent and generate a curing reaction, latex particles are mutually close and fused after moisture volatilizes in the coating drying and curing process, epoxy resin molecules are crosslinked to gradually form a three-dimensional network structure, and finally a uniform and continuous coating film is formed.
Description
Technical Field
The invention relates to the technical field of pavement markings, in particular to a water-based marking emulsion and a coating containing the same.
Background
At present, carbon five petroleum resin or thermoplastic acrylic resin is generally used as a base material in the existing road marking paint, liquefied gas is used for heating and melting the resin to be paved on a road surface during construction, and a film is formed after cooling. Or a solvent type acrylic resin coating is used, and the film is formed after the organic solvent is volatilized. The solvent type acrylic resin coating contains a large amount of benzene solvents (more than 40 percent), the solvent is volatilized during construction, the VOC content reaches 650g/L and exceeds the national minimum VOC volatilization standard of 420 g/L. The construction and production of the product not only causes environmental pollution, but also causes energy waste. In order to solve the problems, the single-component water-based acrylic emulsion is used as a base line marking coating on the market, although the content of volatile organic compounds is reduced, the wear resistance and the adhesive force of the marking coating can not meet the application requirements, the wear resistance life is short, the marking coating needs to be recoated for many times every year, and the maintenance cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water-based marking emulsion, which can solve the problems of poor wear resistance and poor water resistance of the acrylic emulsion in the prior art, and therefore, the invention also provides a water-based marking paint.
In order to solve the problems, the invention adopts the following technical scheme:
in a first aspect of the invention, an aqueous marking emulsion is provided, which comprises the following components in parts by weight: 10-42 parts of epoxy resin, 0.2-2 parts of methacrylic acid, 0.2-2 parts of methyl methacrylate, 0.2-2 parts of butyl acrylate, 2.5-6 parts of emulsifier, 0.01-0.05 part of initiator and 50-80 parts of water.
Preferably, the emulsifier comprises a non-reactive anionic emulsifier and a non-ionic emulsifier, and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
As a preferred technical scheme, the non-reactive ionic emulsifier is alkyl alcohol ether sulfate, and the non-reactive ionic emulsifier is polyoxyethylene polyoxypropylene ether.
As a preferred technical scheme, the initiator is dibenzoyl peroxide.
In a second aspect of the present invention, there is provided an aqueous marking paint, including the above aqueous marking emulsion, further including: water-soluble epoxy curing agent, film-forming auxiliary agent, dispersant, defoaming agent, pH regulator, toner, heavy filler, thickening agent and deionized water.
The preferable technical scheme comprises the following components in parts by weight: 30-50 parts of water-based marking emulsion, 2-6 parts of water-soluble epoxy curing agent, 1-5 parts of film-forming additive, 0.1-0.5 part of dispersing agent, 0.1-0.3 part of defoaming agent, 0.5-1 part of pH regulator, 5-15 parts of toner, 30-55 parts of heavy filler, 0.3-0.8 part of thickening agent and 3-8 parts of deionized water.
As a preferred technical scheme, the composition also comprises the following components in parts by weight: 0.1-0.5 part of ammonium persulfate and 0.01-0.1 part of flash rust inhibitor.
The preferable technical scheme is characterized in that the toner is titanium dioxide, and the heavy filler is precipitated barium sulfate or precipitated calcium sulfate.
In a third aspect of the present invention, there is provided a method for preparing an aqueous marking emulsion, comprising the steps of:
step one, preparing a mixed monomer; adding 0.2-2 parts of methacrylic acid, 0.2-2 parts of methyl methacrylate, 0.2-2 parts of butyl acrylate and 10-42 parts of epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding 25-40 parts of water, 1.25-3 parts of emulsifier and 0.01-0.03 part of initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under a high-speed stirring condition for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding 25-40 parts of water and 1.25-3 parts of emulsifier into a reaction kettle, heating to 80-85 ℃, dropwise adding the pre-emulsion obtained in the step two into the reaction kettle, preserving heat for 3-4 hours after dropwise adding, dropwise adding 0.01-0.05 part of initiator into the reaction kettle, adjusting the pH of the mixed solution to 7-7.5, cooling to room temperature, filtering, and taking filtrate to obtain the marked line emulsion.
Preferably, in the second step, the stirring speed of the high-speed stirring is 1200 rpm.
As a preferable technical scheme, the adding amount of the emulsifier in the step two is the same as that of the emulsifier in the step three.
As a preferable technical scheme, the adding amount of the initiator in the second step is the same as that of the initiator in the third step.
Preferably, the emulsifier comprises a non-reactive anionic emulsifier and a non-ionic emulsifier, and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
The fourth aspect of the invention provides a preparation method of a water-based line marking paint, which comprises the following steps:
step one, preparing a premixed coating; adding 30-50 parts of water-based marking emulsion, 1-5 parts of film-forming additive, 0.1-0.5 part of dispersant, 0.1-0.3 part of defoamer, 0.5-1 part of pH regulator, 5-15 parts of toner, 30-55 parts of heavy filler, 0.3-0.8 part of thickener and 3-8 parts of deionized water into a stirring kettle in sequence.
Step two, preparing water-based marking paint; and adding 2-6 parts of water-soluble epoxy curing agent into the premixed paint, and uniformly stirring to obtain the water-based marking paint.
As a preferred technical scheme, the specific steps of the first step are as follows: sequentially adding the aqueous marking emulsion, the film-forming auxiliary agent, the dispersing agent, the defoaming agent, the pH regulator, the toner, the heavy filler, the thickening agent and the deionized water into a stirring kettle at the speed of 800 revolutions per minute, and stirring for 20 minutes at the speed of 1200 revolutions per minute after the addition is finished.
Preferably, the stirring speed in the second step is 300 rpm.
In the aqueous linear mark emulsion, the epoxy resin component is dispersed in colloidal particles of methacrylic acid, methyl methacrylate and butyl acrylate in a form similar to a 'core-shell' structure. The water-based linear marking emulsion and the water-soluble epoxy curing agent are mixed, the water-soluble epoxy curing agent is dissolved in the water phase of the composite emulsion through stirring, in the film forming process, the epoxy resin in the water-based linear marking emulsion diffuses out colloidal particles, the colloidal particles are contacted with the water-soluble epoxy curing agent and generate a curing reaction, in the coating drying and curing process, after moisture volatilizes, the latex particles approach and fuse with each other, the epoxy resin molecules are gradually crosslinked to form a three-dimensional network structure, and finally a uniform and continuous coating film is formed.
The water-based marking paint prepared from the water-based marking emulsion has good weather resistance and low VOC volatility of the acrylic emulsion, has excellent water resistance and adhesiveness of epoxy resin, and can greatly improve the wear resistance of the water-based marking paint.
Detailed Description
Example 1
The water-based line marking paint comprises the following components in parts by weight:
50kg of aqueous marking emulsion, 2kg of water-soluble epoxy curing agent (BANCO901, from Bound and chemical (China) Co., Ltd.), 5kg of film-forming additive (dipropylene glycol monobutyl ether (DPnB), Dow chemical), 0.1kg of dispersant (BYK-190, Pic chemical), 0.3kg of defoamer (TEGO Airex 902W, Dessidao), 0.5kg of pH regulator (2-amino-2-methyl-1-propanol, AMP-95), 15kg of toner (titanium dioxide, Kemu titanium white technology), 30kg of heavy filler (precipitated barium sulfate, Nanfeng group), 0.8kg of thickener (RHEOLATE 299, Haimanshi scale), 3kg of deionized water, 0.5kg of Ammonium Persulfate (APS), and 0.01kg of flash rust inhibitor (sodium nitrite, national medicine group chemical reagent Co., Ltd.).
The water-based line marking emulsion comprises the following components in parts by weight: 42kg of epoxy resin (NPEL 128, south Asia resin), 0.2kg of methacrylic acid (MMA), 2kg of methyl methacrylate (BA), 0.2kg of butyl acrylate (MAA), 6kg of emulsifier, 0.01kg of initiator (dibenzoyl peroxide) and 80kg of water. Wherein the emulsifier comprises non-reactive anionic emulsifier (alkyl alcohol ether sulfate, GS-730, Shanghai loyalty fine chemical Co., Ltd.) and non-ionic emulsifier (Pluronic F108, BASF Co., Ltd.), and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
The preparation method of the water-based linear marking emulsion comprises the following steps:
step one, preparing a mixed monomer; adding methacrylic acid, methyl methacrylate, butyl acrylate and epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding water, an emulsifier and an initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under the stirring condition of 1200 revolutions per minute for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding water and an emulsifier into a reaction kettle, heating to 85 ℃, dropwise adding the pre-emulsion obtained in the step two into the reaction kettle, preserving the temperature for 3 hours after dropwise adding is finished, dropwise adding an initiator into the reaction kettle, adjusting the pH of the mixed solution to be 7.5, cooling to room temperature, filtering, and taking filtrate to obtain the marked line emulsion.
The addition amount of the emulsifier in the second step is the same as that of the emulsifier in the third step, and the addition amount of the initiator in the second step is the same as that of the initiator in the third step.
The preparation method of the water-based line marking paint comprises the following steps:
step one, preparing a premixed coating; sequentially adding the aqueous marking emulsion, the film-forming auxiliary agent, the dispersing agent, the defoaming agent, the pH regulator, the toner, the heavy filler, the thickening agent and the deionized water into a stirring kettle at the speed of 800 revolutions per minute, and stirring for 20 minutes at the speed of 1200 revolutions per minute after the addition is finished.
Step two, preparing water-based marking paint; 2kg of water-soluble epoxy curing agent is added into the premixed paint, and the mixture is uniformly stirred under the condition of 300 revolutions per minute to obtain the water-based marking paint.
Example 2
The water-based line marking paint comprises the following components in parts by weight:
30kg of aqueous marking emulsion, 6kg of water-soluble epoxy curing agent (BANCO901, from Bonder and Chemicals (China)) 6kg of film-forming additive (dipropylene glycol monobutyl ether (DPnB), Dow chemical) 1kg of dispersant (BYK-190, Bike chemical), 0.5kg of defoamer (TEGO Airex 902W, Degusedo), 0.1kg of pH regulator (2-amino-2-methyl-1-propanol, AMP-95)1kg of toner (titanium dioxide, Kemu titanium white technology) 5kg of heavy filler (precipitated calcium sulfate, Nanfeng group), 55kg of thickener (RHEOLATE 299, Haimaodre formula), 8kg of deionized water, 0.1kg of Ammonium Persulfate (APS), and 0.1kg of flash rust inhibitor (sodium nitrite, national medicine group chemical reagent Co., Ltd.).
The water-based line marking emulsion comprises the following components in parts by weight: 10kg of epoxy resin (NPEL 128, south Asia resin), 2kg of methacrylic acid (MMA), 0.2kg of methyl methacrylate (BA), 2kg of butyl acrylate (MAA), 2.5kg of emulsifier, 0.05kg of initiator (dibenzoyl peroxide) and 50kg of water. Wherein the emulsifier comprises non-reactive anionic emulsifier (alkyl alcohol ether sulfate, GS-730, Shanghai loyalty fine chemical Co., Ltd.) and non-ionic emulsifier (Pluronic F108, BASF Co., Ltd.), and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
The preparation method of the water-based linear marking emulsion comprises the following steps:
step one, preparing a mixed monomer; adding methacrylic acid, methyl methacrylate, butyl acrylate and epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding water, an emulsifier and an initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under the stirring condition of 1200 revolutions per minute for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding water and an emulsifier into a reaction kettle, heating to 80 ℃, dropwise adding the pre-emulsion obtained in the step two into the reaction kettle, preserving the temperature for 4 hours after dropwise adding is finished, dropwise adding an initiator into the reaction kettle, adjusting the pH of the mixed solution to be 7, cooling to room temperature, filtering, and taking filtrate to obtain the marking emulsion.
The addition amount of the emulsifier in the second step is the same as that of the emulsifier in the third step, and the addition amount of the initiator in the second step is the same as that of the initiator in the third step.
The preparation method of the water-based line marking paint comprises the following steps:
step one, preparing a premixed coating; sequentially adding the aqueous marking emulsion, the film-forming auxiliary agent, the dispersing agent, the defoaming agent, the pH regulator, the toner, the heavy filler, the thickening agent and the deionized water into a stirring kettle at the speed of 800 revolutions per minute, and stirring for 20 minutes at the speed of 1200 revolutions per minute after the addition is finished.
Step two, preparing water-based marking paint; 6kg of water-soluble epoxy curing agent is added into the premixed paint, and the mixture is uniformly stirred under the condition of 300 revolutions per minute to obtain the water-based marking paint.
Example 3
The water-based line marking paint comprises the following components in parts by weight:
30kg of aqueous marking emulsion, 2kg of water-soluble epoxy curing agent (BANCO901, from Bonder and Chemicals (China)) 2kg of film-forming additive (dipropylene glycol monobutyl ether (DPnB), Dow chemical) 1kg of dispersant (BYK-190, Bike chemical), 0.1kg of defoamer (TEGO Airex 902W, Dessidygao), 0.1kg of pH regulator (2-amino-2-methyl-1-propanol, AMP-95), 5kg of toner (titanium dioxide, Kemu titanium white technology), 30kg of heavy filler (precipitated calcium sulfate, Nanfeng group), 0.3kg of thickener (RHEOLATE 299, Haimazedwood), 3kg of deionized water, 0.1kg of Ammonium Persulfate (APS), and 0.01kg of flash rust inhibitor (sodium nitrite, national medicine group chemical reagent Co., Ltd.).
The water-based line marking emulsion comprises the following components in parts by weight: 10kg of epoxy resin (NPEL 128, south Asia resin), 0.2kg of methacrylic acid (MMA), 0.2kg of methyl methacrylate (BA), 0.2kg of butyl acrylate (MAA), 2.5kg of emulsifier, 0.01kg of initiator (dibenzoyl peroxide) and 50kg of water. Wherein the emulsifier comprises non-reactive anionic emulsifier (alkyl alcohol ether sulfate, GS-730, Shanghai loyalty fine chemical Co., Ltd.) and non-ionic emulsifier (Pluronic F108, BASF Co., Ltd.), and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
The preparation method of the water-based linear marking emulsion comprises the following steps:
step one, preparing a mixed monomer; adding methacrylic acid, methyl methacrylate, butyl acrylate and epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding water, an emulsifier and an initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under the stirring condition of 1200 revolutions per minute for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding water and an emulsifier into a reaction kettle, heating to 80 ℃, dropwise adding the pre-emulsion obtained in the step two into the reaction kettle, preserving the temperature for 3 hours after dropwise adding is finished, dropwise adding an initiator into the reaction kettle, adjusting the pH of the mixed solution to be 7, cooling to room temperature, filtering, and taking filtrate to obtain the marking emulsion.
The addition amount of the emulsifier in the second step is the same as that of the emulsifier in the third step, and the addition amount of the initiator in the second step is the same as that of the initiator in the third step.
The preparation method of the water-based line marking paint comprises the following steps:
step one, preparing a premixed coating; sequentially adding the aqueous marking emulsion, the film-forming auxiliary agent, the dispersing agent, the defoaming agent, the pH regulator, the toner, the heavy filler, the thickening agent and the deionized water into a stirring kettle at the speed of 800 revolutions per minute, and stirring for 20 minutes at the speed of 1200 revolutions per minute after the addition is finished.
Step two, preparing water-based marking paint; 2kg of water-soluble epoxy curing agent is added into the premixed paint, and the mixture is uniformly stirred under the condition of 300 revolutions per minute to obtain the water-based marking paint.
Example 4
The water-based line marking paint comprises the following components in parts by weight:
50 parts of water-based marking emulsion, 6kg of water-soluble epoxy curing agent (BANCO901, nation & chemical Co., Ltd.), 5kg of film-forming additive (dipropylene glycol monobutyl ether (DPnB), Dow chemical), 0.5kg of dispersant (BYK-190, Pic chemical), 0.3kg of defoamer (TEGO Airex 902W, Dessidygao), 1kg of pH regulator (2-amino-2-methyl-1-propanol, AMP-95), 15kg of toner (titanium dioxide, Kemu titanium white technology), 55kg of heavy filler (precipitated barium sulfate, Nanfeng group), 0.8kg of thickener (RHEOLATE 299, Haimaedham), 8kg of deionized water, 0.5kg of Ammonium Persulfate (APS), and 0.1kg of flash rust inhibitor (sodium nitrite, national medicine group chemical reagent Co., Ltd.).
The water-based line marking emulsion comprises the following components in parts by weight: 42kg of epoxy resin (NPEL 128, south Asia resin), 2kg of methacrylic acid (MMA), 2kg of methyl methacrylate (BA), 2kg of butyl acrylate (MAA), 6kg of emulsifier, 0.05kg of initiator (dibenzoyl peroxide) and 80kg of water. Wherein the emulsifier comprises non-reactive anionic emulsifier (alkyl alcohol ether sulfate, GS-730, Shanghai loyalty fine chemical Co., Ltd.) and non-ionic emulsifier (Pluronic F108, BASF Co., Ltd.), and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
The preparation method of the water-based linear marking emulsion comprises the following steps:
step one, preparing a mixed monomer; adding methacrylic acid, methyl methacrylate, butyl acrylate and epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding water, an emulsifier and an initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under the stirring condition of 1200 revolutions per minute for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding water and an emulsifier into a reaction kettle, heating to 85 ℃, dropwise adding the pre-emulsion obtained in the step two into the reaction kettle, preserving the temperature for 4 hours after dropwise adding is finished, dropwise adding an initiator into the reaction kettle, adjusting the pH of the mixed solution to be 7.5, cooling to room temperature, filtering, and taking filtrate to obtain the marked line emulsion.
The addition amount of the emulsifier in the second step is the same as that of the emulsifier in the third step, and the addition amount of the initiator in the second step is the same as that of the initiator in the third step.
The preparation method of the water-based line marking paint comprises the following steps:
step one, preparing a premixed coating; sequentially adding the aqueous marking emulsion, the film-forming auxiliary agent, the dispersing agent, the defoaming agent, the pH regulator, the toner, the heavy filler, the thickening agent and the deionized water into a stirring kettle at the speed of 800 revolutions per minute, and stirring for 20 minutes at the speed of 1200 revolutions per minute after the addition is finished.
Step two, preparing water-based marking paint; 6kg of water-soluble epoxy curing agent is added into the premixed paint, and the mixture is uniformly stirred under the condition of 300 revolutions per minute to obtain the water-based marking paint.
Example 5
The water-based line marking paint comprises the following components in parts by weight:
40 parts of water-based marking emulsion, 4kg of water-soluble epoxy curing agent (BANCO901, nation and chemical (China) Co., Ltd.), 3kg of film-forming additive (dipropylene glycol monobutyl ether (DPnB), Dow chemical), 0.3kg of dispersant (BYK-190, Pic chemical), 0.2kg of defoaming agent (TEGO Airex 902W, Dessidi high), 0.8kg of pH regulator (2-amino-2-methyl-1-propanol, AMP-95), 10kg of toner (titanium dioxide, Kemu titanium white technology), 44kg of heavy filler (precipitated barium sulfate, Nanfeng group), 0.5kg of thickener (RHEOLATE 299, Haimanshi salt), 5kg of deionized water, 0.1-0.5kg of Ammonium Persulfate (APS), and 0.01-0.1kg of anti-flash rust agent (sodium nitrite, national medicine group chemical reagent Co., Ltd.).
The water-based line marking emulsion comprises the following components in parts by weight: 30kg of epoxy resin (NPEL 128, south Asia resin), 1kg of methacrylic acid (MMA), 1kg of methyl methacrylate (BA), 1kg of butyl acrylate (MAA), 4kg of emulsifier, 0.03kg of initiator (dibenzoyl peroxide) and 65kg of water. Wherein the emulsifier comprises non-reactive anionic emulsifier (alkyl alcohol ether sulfate, GS-730, Shanghai loyalty fine chemical Co., Ltd.) and non-ionic emulsifier (Pluronic F108, BASF Co., Ltd.), and the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
The preparation method of the water-based linear marking emulsion comprises the following steps:
step one, preparing a mixed monomer; adding methacrylic acid, methyl methacrylate, butyl acrylate and epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding water, an emulsifier and an initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under the stirring condition of 1200 revolutions per minute for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding water and an emulsifier into a reaction kettle, heating to 83 ℃, dropwise adding the pre-emulsion obtained in the second step into the reaction kettle, preserving the temperature for 3.5 hours after dropwise adding, dropwise adding an initiator into the reaction kettle, adjusting the pH of the mixed solution to 7.3, cooling to room temperature, filtering, and taking filtrate to obtain the marked line emulsion.
The addition amount of the emulsifier in the second step is the same as that of the emulsifier in the third step, and the addition amount of the initiator in the second step is the same as that of the initiator in the third step.
The preparation method of the water-based line marking paint comprises the following steps:
step one, preparing a premixed coating; sequentially adding the aqueous marking emulsion, the film-forming auxiliary agent, the dispersing agent, the defoaming agent, the pH regulator, the toner, the heavy filler, the thickening agent and the deionized water into a stirring kettle at the speed of 800 revolutions per minute, and stirring for 20 minutes at the speed of 1200 revolutions per minute after the addition is finished.
Step two, preparing water-based marking paint; 4kg of water-soluble epoxy curing agent is added into the premixed paint, and the mixture is uniformly stirred under the condition of 300 revolutions per minute to obtain the water-based marking paint.
The performance of the coating film is as follows: the adhesion is tested according to GB/T9286-1998; the pencil hardness is in accordance with GB/T6739-2006; testing the non-stick time according to JT 280-2004; (ii) a Water resistance (240h) was tested according to GB/T1733-1993; abrasion resistance was tested according to GB/T1768, a coating template was prepared as required, and the coating properties were tested, with the results shown in the following table. Experiments compared common water-based marking paint with composite water-based marking paint.
As can be seen from the table above, the surface drying time of the water-based marking paint is only 25min, the hardness of the coating film can be quickly established at the initial stage of film formation, the paint is superior to the common water-based marking paint, the drying time of the paint is shorter, and the paint construction is more convenient. After the coating is cured, the coating has excellent adhesive force and good wear resistance, and the hardness reaches H. In addition, the water resistance of the water-based marking paint coating film is excellent, and the performance of the water-based marking paint coating film reaches the level of an oil-based marking paint. The acrylic emulsion component in the water-based marking paint has high relative molecular mass, so that the coating has excellent performance, and on the other hand, the epoxy component in the emulsion is crosslinked with the curing agent, so that the coating performance is further improved. Therefore, the composite marking paint has excellent comprehensive performance and good wear resistance, reduces the recoating time and can obviously reduce the comprehensive use cost of the paint.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (8)
1. The water-based marking emulsion is characterized by comprising the following components in parts by weight: 10-42 parts of epoxy resin, 0.2-2 parts of methacrylic acid, 0.2-2 parts of methyl methacrylate, 0.2-2 parts of butyl acrylate, 2.5-6 parts of emulsifier, 0.01-0.05 part of initiator and 50-80 parts of water; the emulsifier comprises a non-reactive anionic emulsifier and a non-ionic emulsifier;
the preparation method of the water-based linear marking emulsion comprises the following steps:
step one, preparing a mixed monomer; adding methacrylic acid, methyl methacrylate, butyl acrylate and epoxy resin into a stirring kettle, and uniformly stirring and mixing to obtain a mixed monomer;
step two, preparing a pre-emulsion; adding water, an emulsifier and an initiator into a pre-emulsification kettle, stirring and mixing uniformly, and adding a mixed monomer under the stirring condition of 1200 revolutions per minute for pre-emulsification to obtain a pre-emulsion;
step three, preparing a marking emulsion; adding water and an emulsifier into a reaction kettle, heating to 85 ℃, dropwise adding the pre-emulsion obtained in the step two into the reaction kettle, preserving the temperature for 4 hours after dropwise adding is finished, dropwise adding an initiator into the reaction kettle, adjusting the pH of the mixed solution to be 7.5, cooling to room temperature, filtering, and taking filtrate to obtain the marked line emulsion.
2. The aqueous marking emulsion of claim 1, wherein the weight ratio of the non-reactive anionic emulsifier to the non-ionic emulsifier is 2: 1.
3. The aqueous reticle emulsion of claim 2 wherein the non-reactive ionic emulsifier is an alkyl alcohol ether sulfate and the non-ionic emulsifier is a polyoxyethylene polyoxypropylene ether.
4. The aqueous, linear emulsion of claim 1, wherein the initiator is dibenzoyl peroxide.
5. An aqueous marking paint comprising the aqueous marking emulsion of any of claims 1-4, further comprising: water-soluble epoxy curing agent, film-forming auxiliary agent, dispersant, defoaming agent, pH regulator, toner, heavy filler, thickening agent and deionized water.
6. The aqueous marking paint of claim 5, comprising the following components in parts by weight: 30-50 parts of water-based marking emulsion, 2-6 parts of water-soluble epoxy curing agent, 1-5 parts of film-forming additive, 0.1-0.5 part of dispersing agent, 0.1-0.3 part of defoaming agent, 0.5-1 part of pH regulator, 5-15 parts of toner, 30-55 parts of heavy filler, 0.3-0.8 part of thickening agent and 3-8 parts of deionized water.
7. The aqueous marking paint of claim 6, further comprising the following components in parts by weight: 0.1-0.5 part of ammonium persulfate and 0.01-0.1 part of flash rust inhibitor.
8. The aqueous marking paint of claim 5, wherein the toner is titanium dioxide and the heavy filler is precipitated barium sulfate or precipitated calcium sulfate.
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