CN113372806B - Odorless nonflammable reactive two-component marking paint and preparation method thereof - Google Patents
Odorless nonflammable reactive two-component marking paint and preparation method thereof Download PDFInfo
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- CN113372806B CN113372806B CN202110525230.XA CN202110525230A CN113372806B CN 113372806 B CN113372806 B CN 113372806B CN 202110525230 A CN202110525230 A CN 202110525230A CN 113372806 B CN113372806 B CN 113372806B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant 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
- C09D7/63—Additives non-macromolecular organic
Abstract
The invention discloses an odorless nonflammable reactive two-component marking paint and a preparation method thereof, wherein the odorless nonflammable reactive two-component marking paint comprises a component A and a component B which are mixed for use, and the weight ratio of the component A to the component B is 100: 100; the component A comprises the following raw materials in parts by weight: 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate, 40-50 parts of aliphatic flexible polyurethane, 10-20 parts of pigment, 30-50 parts of filler, 1-3 parts of anti-settling agent, 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 0.5-1 part of accelerator; the component B comprises the following raw materials in parts by weight: 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate, 40-50 parts of aliphatic flexible polyurethane, 10-20 parts of pigment, 30-50 parts of filler, 1-3 parts of anti-settling agent, 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 1-3 parts of curing agent. The technical scheme of the invention realizes the odorless, nonflammable, high flexibility and high elongation of the coating.
Description
Technical Field
The invention relates to the technical field of protective coatings, in particular to an odorless nonflammable reactive two-component marking coating and a preparation method thereof.
Background
The road marking mainly comprises two major types, namely a hot melting type and a double-component reaction type. The hot-melt type marked line is easy to soften, stick, stain and turn black in color at high temperature in summer, has obvious tire mark, is relatively brittle in winter, is very easy to crack, has poor water resistance and is easy to fall off. The bi-component reactive marking paint is mainly a methyl methacrylate reactive marking paint, and because of containing Methyl Methacrylate (MMA) and n-butyl methacrylate monomers, the paint has a heavy pungent smell during spraying, has a great influence on the environment, is particularly influenced in construction in urban central areas, and simultaneously, the MMA monomers are extremely easy to burn, and have great potential safety hazards in production, storage and use. Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The invention mainly aims to provide an odorless nonflammable reactive two-component marking paint and a preparation method thereof, aiming at improving the components of the existing paint and realizing the odorless, nonflammable, high flexibility and high elongation of the paint.
In order to achieve the purpose, the odorless nonflammable reactive two-component marking paint provided by the invention comprises a component A and a component B which are mixed for use, wherein the weight ratio of the component A to the component B is 100: 100;
the component A comprises the following raw materials in parts by weight:
the component B comprises the following raw materials in parts by weight:
preferably, the polyurethane dimethacrylate is prepared by reacting isophorone diisocyanate and hydroxyethyl methacrylate, and the reaction weight ratio is as follows: 30-60 parts of isophorone diisocyanate, hydroxyethyl methacrylate: 80-100 parts.
Preferably, the aliphatic flexible polyurethane is prepared by the reaction of hydrogenated phenyl methane diisocyanate, hydroxyethyl methacrylate, dimer acid polyester diol, polyaspartic acid ester and methacrylic acid glycerol formal ester, and the reaction weight ratio is as follows: 40-60 parts of hydrogenated phenyl methane diisocyanate, 1-5 parts of hydroxyethyl methacrylate, 80-120 parts of dimer acid polyester diol, 55-75 parts of polyaspartic acid ester and 80-120 parts of methacrylic acid glycerol formal ester.
Preferably, the pigment comprises rutile titanium dioxide, the filler comprises ground calcium carbonate, and the anti-settling agent comprises fumed silica.
Preferably, the accelerator comprises N, N-dihydroxyethyl p-toluidine and the curing agent comprises benzoyl peroxide.
In order to realize the purpose, the invention also provides a preparation method of the odorless nonflammable reactive two-component marking paint, which comprises the following steps:
step 1, preparation of a component A:
adding 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate and 40-50 parts of aliphatic flexible polyurethane into a high-speed disperser, and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 1-3 parts of anti-settling agent into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and stirring dispersedly for 15-20 min:
adding 10-20 parts of pigment into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 30-50 parts of filler into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and the dispersing stirring is carried out for 30-60 minutes;
adding 0.5-1 part of accelerator into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 10-15 min;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
step 2, preparation of the component B:
(1) adding 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate and 40-50 parts of aliphatic flexible polyurethane into a high-speed disperser, and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 1-3 parts of anti-settling agent into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and stirring dispersedly for 15-20 min:
adding 10-20 parts of pigment into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 30-50 parts of filler into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and the dispersing stirring is carried out for 30-60 minutes;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
(2) independently packaging 1-3 parts of curing agent, and adding the independently packaged 1-3 parts of curing agent into the material obtained in the step (1) when mixing with the component A, and stirring for 3-5 minutes at a stirring speed of 50-100 rpm to obtain a component B;
and 3, mixing the component A and the component B:
respectively pouring the stirred component B and the component A into two charging barrels of a two-component marking spraying machine, adjusting the feeding amount of the spraying machine, and keeping the ratio of the component A to the component B of 1: and 1, carrying out mixed feeding spraying.
Preferably, the synthesis of the polyurethane dimethacrylate comprises the following steps: adding 30-60 parts of isophorone diisocyanate and 80-100 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting for 2 hours at 85-90 ℃, rotating at 60-70 r/min, cooling to below 50 ℃, and discharging.
Preferably, the synthesis of the aliphatic flexible polyurethane comprises the following steps: adding 40-60 parts of hydrogenated phenyl methane diisocyanate and 1-5 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 1 hour at a rotating speed of 60-70 r/min;
then adding 80-120 parts of dehydrated dimer acid polyester dihydric alcohol into the reactor, stirring at a constant temperature of 85-90 ℃ for reaction for 2 hours, wherein the rotating speed is 60-70 r/min;
then adding 80-120 parts of methacrylic acid glycerol formal ester into the reactor, stirring and reacting at the constant temperature of 85-90 ℃ for 30min, wherein the rotating speed is 60-70 r/min;
then adding 55-75 parts of polyaspartic acid ester into the reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 2 hours at a rotating speed of 60-70 r/min;
and after the NCO content of the test system is lower than 0.5%, cooling to below 50 ℃ and discharging.
Preferably, the pigment comprises rutile titanium dioxide, the filler comprises ground calcium carbonate, and the anti-settling agent comprises fumed silica.
Preferably, the accelerator comprises N, N-dihydroxyethyl p-toluidine and the curing agent comprises benzoyl peroxide.
Compared with the prior art, the invention has the beneficial effects that: the coating of the invention has basically no smell, and has higher flash point in inflammability, exceeds the limit of a defined inflammable product (below 60 ℃), can be positioned and is not inflammable, and because the component A has the accelerant and the component B has the curing agent, the accelerant and the curing agent are mixed to immediately initiate free radical polymerization, so that the coating is more flexible in flexibility compared with similar products; in elongation, the coating is more than 10 times of similar products, can better adapt to the deformation of a road surface without cracking, is still not broken when bent by 180 degrees at the temperature of minus 35 ℃ in low-temperature flexibility, and is more suitable for being used in the north of China, particularly in cold northeast areas.
Detailed Description
The odorless nonflammable reactive two-component marking paint provided by the embodiment comprises a component A and a component B which are mixed, wherein the weight ratio of the component A to the component B is 100: 100;
the component A comprises the following raw materials in parts by weight:
the component B comprises the following raw materials in parts by weight:
it should be noted that the glycerol formal methacrylate is taken as a film forming monomer, the monomer is basically odorless and nonflammable, and the formed polymer has high strength, the glass transition temperature (Tg) of 80-95 ℃, good organic solvent resistance, good corrosion resistance and good aging resistance.
The polyurethane dimethacrylate is used as a crosslinking monomer, so that the crosslinking density of a system can be improved, and the wear resistance and heat resistance of the coating film are further improved.
The aliphatic flexible polyurethane is used as a toughening modified polymer, can improve the flexibility and extensibility of a coating film, improves the flexibility and bendability of the coating film, improves low-temperature brittleness, and is suitable for being used in cold winter in northern China.
The wetting dispersant can increase the infiltration degree of liquid resin components and powder materials and improve the dispersion uniformity; the defoaming agent can eliminate foaming generated in the production stirring process of the coating; the light stabilizer comprises benzotriazole and hindered amine for compounding, and the aging resistance of the coating film is improved.
Further, the pigment comprises rutile type titanium dioxide and is used for improving the aging resistance and the yellow deformation resistance of the coating film; the filler comprises heavy calcium carbonate with 600-800 meshes, so that the viscosity of the coating is increased, the cost is reduced, and the aging resistance of the coating is improved; the anti-precipitation agent comprises fumed silica, and is used for increasing the viscosity of the coating and preventing the filler from precipitating.
Further, the accelerant comprises N, N-dihydroxyethyl p-toluidine, and a redox initiation system is formed by the N, N-dihydroxyethyl p-toluidine and benzoyl peroxide to initiate the direct polymerization crosslinking reaction of the methacrylic acid glycerol formal ester monomer, the polyurethane dimethacrylate and the aliphatic flexible polyurethane; the curing agent comprises benzoyl peroxide, and a reduction initiation system is formed by adopting Perkadox CH-50(50 percent content) of Acksonobel company and an accelerator to initiate the direct polymerization crosslinking reaction of the methacrylic acid glycerol formal ester monomer, the polyurethane dimethacrylate and the aliphatic flexible polyurethane.
Furthermore, the polyurethane dimethacrylate is prepared by reacting isophorone diisocyanate and hydroxyethyl methacrylate, the special polyurethane containing two methacrylate functional groups has good reaction activity, a polymer formed after curing has good hardness and crosslinking density, the acid and alkali corrosion resistance is very good, the high temperature resistance is good, and the reaction weight ratio is as follows: 30-60 parts of isophorone diisocyanate, hydroxyethyl methacrylate: 80-100 parts.
Furthermore, the aliphatic flexible polyurethane is prepared by reacting hydrogenated phenyl methane diisocyanate, hydroxyethyl methacrylate, dimer acid polyester diol, polyaspartic acid ester and methacrylic acid glycerol formal ester, wherein the methacrylic acid glycerol formal ester is used as a dilution monomer, the aliphatic flexible polyurethane has good aging resistance, and meanwhile, the methacrylic acid ester group is connected to a chemical structure, so that the polyurethane has certain reaction activity and can participate in a polymerization crosslinking reaction between the methacrylic acid glycerol formal ester and polyurethane dimethacrylate to form an integral structure, the elongation and flexibility of a coating film are further improved, and the low-temperature brittleness of the coating film is further improved.
In the embodiment, the dimer acid polyester diol adopts a commercial product BY3026 of herborides chemical company, and has a hydroxyl value of 35-55 mgKOH/g; the polyaspartic acid ester has an amine value of 190-210 mgKOH/g, and is a commercial product with a trademark of NH1420 of Corcisco.
The reaction weight portion ratio is: 40-60 parts of hydrogenated phenyl methane diisocyanate, 1-5 parts of hydroxyethyl methacrylate, 80-120 parts of dimer acid polyester diol, 55-75 parts of polyaspartic acid ester and 80-120 parts of methacrylic acid glycerol formal ester.
The embodiment also provides a preparation method of the odorless nonflammable reactive bi-component marking paint, which comprises the following steps:
step 1, preparation of a component A:
adding 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate and 40-50 parts of aliphatic flexible polyurethane into a high-speed disperser, and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 1-3 parts of anti-settling agent into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and stirring dispersedly for 15-20 min:
adding 10-20 parts of pigment into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 30-50 parts of filler into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and the dispersing stirring is carried out for 30-60 minutes;
adding 0.5-1 part of accelerator into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 10-15 min;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
step 2, preparation of the component B:
(1) adding 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate and 40-50 parts of aliphatic flexible polyurethane into a high-speed disperser, and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 1-3 parts of anti-settling agent into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and stirring dispersedly for 15-20 min:
adding 10-20 parts of pigment into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 30-50 parts of filler into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and the dispersing stirring is carried out for 30-60 minutes;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
2) independently packaging 1-3 parts of curing agent, and adding the independently packaged 1-3 parts of curing agent into the material obtained in the step (1) when mixing with the component A, and stirring for 3-5 minutes at a stirring speed of 50-100 rpm to obtain a component B;
and 3, mixing the component A and the component B:
respectively pouring the stirred component B and the component A into two charging barrels of a two-component marking spraying machine, adjusting the feeding amount of the spraying machine, and keeping the ratio of the component A to the component B of 1: and 1, carrying out mixed feeding spraying.
It should be noted that the glycerol formal methacrylate is taken as a film forming monomer, the monomer is basically odorless and nonflammable, and the formed polymer has high strength, the glass transition temperature (Tg) of 80-95 ℃, good organic solvent resistance, good corrosion resistance and good aging resistance.
The polyurethane dimethacrylate is used as a crosslinking monomer, so that the crosslinking density of a system can be improved, and the wear resistance and heat resistance of the coating film are further improved.
The aliphatic flexible polyurethane is used as a toughening modified polymer, can improve the flexibility and extensibility of a coating film, improves the flexibility and bendability of the coating film, improves low-temperature brittleness, and is suitable for being used in cold winter in northern China.
The wetting dispersant can increase the infiltration degree of liquid resin components and powder materials and improve the dispersion uniformity; the defoaming agent can eliminate foaming generated in the production stirring process of the coating; the light stabilizer comprises benzotriazole and hindered amine for compounding, and the aging resistance of the coating film is improved.
Further, the pigment comprises rutile type titanium dioxide and is used for improving the aging resistance and the yellow deformation resistance of the coating film; the filler comprises heavy calcium carbonate with 600-800 meshes, so that the viscosity of the coating is increased, the cost is reduced, and the aging resistance of the coating is improved; the anti-precipitation agent comprises fumed silica, and is used for increasing the viscosity of the coating and preventing the filler from precipitating.
Further, the accelerant comprises N, N-dihydroxyethyl p-toluidine, and a redox initiation system is formed by the N, N-dihydroxyethyl p-toluidine and benzoyl peroxide to initiate the direct polymerization crosslinking reaction of the methacrylic acid glycerol formal ester monomer, the polyurethane dimethacrylate and the aliphatic flexible polyurethane; the curing agent comprises benzoyl peroxide, and a reduction initiation system is formed by adopting Perkadox CH-50(50 percent content) of Acksonobel company and an accelerator to initiate the direct polymerization crosslinking reaction of the methacrylic acid glycerol formal ester monomer, the polyurethane dimethacrylate and the aliphatic flexible polyurethane.
Further, the synthesis of the polyurethane dimethacrylate comprises the following steps: adding 30-60 parts of isophorone diisocyanate and 80-100 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting for 2 hours at 85-90 ℃, rotating at 60-70 r/min, cooling to below 50 ℃, and discharging.
Further, the synthesis of the aliphatic flexible polyurethane comprises the following steps: adding 40-60 parts of hydrogenated phenyl methane diisocyanate and 1-5 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 1 hour at a rotating speed of 60-70 r/min;
then adding 80-120 parts of dehydrated dimer acid polyester dihydric alcohol into the reactor, stirring at a constant temperature of 85-90 ℃ for reaction for 2 hours, wherein the rotating speed is 60-70 r/min;
then adding 80-120 parts of methacrylic acid glycerol formal ester into the reactor, stirring and reacting at the constant temperature of 85-90 ℃ for 30min, wherein the rotating speed is 60-70 r/min;
then adding 55-75 parts of polyaspartic acid ester into the reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 2 hours at a rotating speed of 60-70 r/min;
and after the NCO content of the test system is lower than 0.5%, cooling to below 50 ℃ and discharging.
In the embodiment, the dimer acid polyester diol adopts a commercial product BY3026 of herborides chemical company, and has a hydroxyl value of 35-55 mgKOH/g; the polyaspartic acid ester has an amine value of 190-210 mgKOH/g, and is a commercial product with a trademark of NH1420 of Corcisco.
Further, the present invention is explained by specific examples and data tests:
synthesis of polyurethane dimethacrylate
Adding 40 parts of isophorone diisocyanate and 100 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting for 2 hours at 85-90 ℃, rotating at 60-70 r/min, cooling to below 50 ℃, and discharging.
Synthesis of di-aliphatic flexible polyurethane
Adding 45 parts of hydrogenated phenyl methane diisocyanate and 3 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 1 hour (the rotating speed is 60-70 r/min), then adding 100 parts of dehydrated dimer acid polyester diol into the reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 2 hours (the rotating speed is 60-70 r/min), then adding 100 parts of glycerol formal methacrylate into the reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 30 minutes (the rotating speed is 60-70 r/min), then adding 60 parts of polyaspartic acid ester into the reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 2 hours (the rotating speed is 60-70 r/min), and cooling to below 50 ℃ after the NCO content of a test system is lower than 0.5%, and discharging.
Preparation of marking paint
Preparation of component A:
adding 40 parts of glycerol formal methacrylate, 10 parts of polyurethane dimethacrylate and 40 parts of aliphatic flexible polyurethane into a high-speed disperser (kettle), and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 2 parts of fumed silica into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 15 parts of titanium dioxide into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5 part of wetting dispersant, 0.5 part of defoaming agent, 0.5 part of light stabilizer and 40 parts of calcium carbonate into a high-speed disperser, starting the high-speed disperser while stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 30-60 min;
adding 1 part of N, N-dihydroxyethyl-p-toluidine into a high-speed disperser, starting a high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 10-15 minutes;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging.
Preparation of the component B:
adding 40 parts of glycerol formal methacrylate, 10 parts of polyurethane dimethacrylate and 40 parts of aliphatic flexible polyurethane into a high-speed disperser (kettle), and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 2 parts of fumed silica into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 15 parts of titanium dioxide into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5 part of wetting dispersant, 0.5 part of defoaming agent, 0.5 part of light stabilizer and 40 parts of calcium carbonate into a high-speed disperser, starting the high-speed disperser while stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 30-60 min;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
and (3) packaging the benzoyl peroxide separately, adding the benzoyl peroxide into the component B before use, and stirring for 3-5 minutes, wherein if BPO is added into the component B in advance, the storage stability is poor (gel is generated after 48 hours).
Mixing the component A and the component B:
the component A comprises: and B component: benzoyl peroxide 100: 98: and 2 (part by weight), adding benzoyl peroxide powder into the component B, stirring for 3-5 minutes (stirring speed is 50-100 r/min), and then mixing the component A and the component B.
Fourthly, performance test
The components of the coating prepared in the third example are uniformly mixed and then cured to form a film, and various performance data of the film are tested after curing.
Weighing the components according to the ratio requirement in the third embodiment, adding benzoyl peroxide powder into the component B, stirring for 3-5 minutes, then mixing the component A and the component B, stirring for 3-5 minutes, then blade-coating on a polytetrafluoroethylene plate, keeping the thickness of a wet film at 0.8-1.2 mm, curing for 168 hours under standard conditions after the film is cured, and then testing the physical and mechanical properties. Compared with the similar products of a certain domestic famous enterprise, the performance of the product is as follows:
the above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. An odorless nonflammable reactive two-component marking paint is characterized by comprising a component A and a component B which are mixed for use, wherein the weight ratio of the component A to the component B is 100: 100;
the component A comprises the following raw materials in parts by weight:
the component B comprises the following raw materials in parts by weight:
the aliphatic flexible polyurethane is prepared by reacting hydrogenated phenyl methane diisocyanate, hydroxyethyl methacrylate, dimer acid polyester diol, polyaspartic acid ester and methacrylic acid glycerol formal ester, and the reaction weight ratio is as follows: 40-60 parts of hydrogenated phenyl methane diisocyanate, 1-5 parts of hydroxyethyl methacrylate, 80-120 parts of dimer acid polyester diol, 55-75 parts of polyaspartic acid ester and 80-120 parts of methacrylic acid glycerol formal ester.
2. The odorless nonflammable reactive two-component marking paint of claim 1, wherein the polyurethane dimethacrylate is prepared by reacting isophorone diisocyanate with hydroxyethyl methacrylate, and the reaction weight ratio is as follows: 30-60 parts of isophorone diisocyanate, hydroxyethyl methacrylate: 80-100 parts.
3. The odorless non-flammable reactive two-component marking paint of claim 1, wherein the pigment comprises rutile titanium dioxide, the filler comprises ground calcium carbonate, and the anti-settling agent comprises fumed silica.
4. The odorless non-flammable reactive two-component marking paint of claim 1 wherein the accelerator comprises N, N-dihydroxyethyl p-toluidine and the curing agent comprises benzoyl peroxide.
5. The preparation method of the odorless nonflammable reactive bi-component marking paint is characterized by comprising the following steps of:
step 1, preparation of a component A:
adding 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate and 40-50 parts of aliphatic flexible polyurethane into a high-speed disperser, and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 1-3 parts of anti-settling agent into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 15-20 min;
adding 10-20 parts of pigment into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 30-50 parts of filler into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and the dispersing stirring is carried out for 30-60 minutes;
adding 0.5-1 part of accelerator into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 10-15 min;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
step 2, preparation of the component B:
(1) adding 30-50 parts of glycerol formal methacrylate, 3-10 parts of polyurethane dimethacrylate and 40-50 parts of aliphatic flexible polyurethane into a high-speed disperser, and stirring for 10-15 minutes at a stirring speed of 80-90 revolutions per minute;
adding 1-3 parts of anti-settling agent into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 r/min, and dispersing and stirring for 15-20 min;
adding 10-20 parts of pigment into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and dispersing and stirring for 15-20 minutes;
adding 0.5-1 part of wetting dispersant, 0.5-1 part of defoaming agent, 0.5-1 part of light stabilizer and 30-50 parts of filler into a high-speed disperser, starting the high-speed disperser while keeping stirring, wherein the rotating speed of the disperser is 800-1000 revolutions per minute, and the dispersing stirring is carried out for 30-60 minutes;
grinding the uniformly stirred materials by a grinder until the fineness is less than 80 micrometers, discharging and packaging;
(2) independently packaging 1-3 parts of curing agent, and adding the independently packaged 1-3 parts of curing agent into the material obtained in the step (1) when mixing with the component A, and stirring for 3-5 minutes at a stirring speed of 50-100 rpm to obtain a component B;
and 3, mixing the component A and the component B:
respectively pouring the stirred component B and the component A into two charging barrels of a two-component marking spraying machine, adjusting the feeding amount of the spraying machine, and keeping the weight ratio of the component A to the component B to be 1: 1, carrying out mixed feeding spraying;
the synthesis of the aliphatic flexible polyurethane comprises the following steps: adding 40-60 parts of hydrogenated phenyl methane diisocyanate and 1-5 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 1 hour at a rotating speed of 60-70 r/min;
then adding 80-120 parts of dehydrated dimer acid polyester dihydric alcohol into the reactor, stirring at a constant temperature of 85-90 ℃ for reaction for 2 hours, wherein the rotating speed is 60-70 r/min;
then adding 80-120 parts of methacrylic acid glycerol formal ester into the reactor, stirring and reacting at the constant temperature of 85-90 ℃ for 30min, wherein the rotating speed is 60-70 r/min;
then adding 55-75 parts of polyaspartic acid ester into the reactor, stirring and reacting at a constant temperature of 85-90 ℃ for 2 hours at a rotating speed of 60-70 r/min;
and after the NCO content of the test system is lower than 0.5%, cooling to below 50 ℃ and discharging.
6. The method of claim 5, wherein the polyurethane dimethacrylate is synthesized by the following steps: adding 30-60 parts of isophorone diisocyanate and 80-100 parts of hydroxyethyl methacrylate into a reactor, stirring and reacting for 2 hours at 85-90 ℃, rotating at 60-70 r/min, cooling to below 50 ℃, and discharging.
7. The method of claim 5, wherein the pigment comprises rutile titanium dioxide, the filler comprises ground calcium carbonate, and the anti-settling agent comprises fumed silica.
8. The method of claim 5, wherein the accelerator comprises N, N-dihydroxyethyl-p-toluidine and the curing agent comprises benzoyl peroxide.
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