CN113980539B - Low-gloss water-based epoxy ester coating for steel structure and preparation method thereof - Google Patents
Low-gloss water-based epoxy ester coating for steel structure and preparation method thereof Download PDFInfo
- Publication number
- CN113980539B CN113980539B CN202111351535.XA CN202111351535A CN113980539B CN 113980539 B CN113980539 B CN 113980539B CN 202111351535 A CN202111351535 A CN 202111351535A CN 113980539 B CN113980539 B CN 113980539B
- Authority
- CN
- China
- Prior art keywords
- epoxy ester
- prepolymer
- fatty acid
- coating
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The low-gloss water-based epoxy ester coating for the steel structure and the preparation method thereof are characterized in that the coating is prepared from vinyl modified epoxy ester resin, pigment and filler, auxiliary agent, cosolvent and deionized water; the vinyl modified epoxy ester resin is prepared by the following method: firstly, esterifying with bisphenol A epoxy resin, drying oil fatty acid and a catalyst, and then diluting with tert-carbonic acid glycidyl ester and ethylene glycol monobutyl ether to obtain a prepolymer A; esterifying with alkenyl phenol polyglycidyl ether, dry oil fatty acid, branched chain saturated fatty acid and catalyst, and diluting with polyalkyl-substituted mono-epoxy active diluent and ethylene glycol monobutyl ether to obtain prepolymer B; and then, carrying out graft modification on the prepolymer A and the prepolymer B by using terpene resin, liquid polybutadiene, a vinyl monomer and an initiator to obtain the vinyl modified epoxy ester resin. The raw paint of the coating has good storage stability, low coating film gloss and safe and environment-friendly process materials.
Description
Technical Field
The invention relates to a water-based epoxy ester coating and a preparation method thereof, in particular to a low-gloss water-based epoxy ester coating for a steel structure and a preparation method thereof.
Background
According to the "industrial structure adjustment guidance catalog" (2019), steel-structured buildings belong to industries that encourage development. The amount of steel structures replacing reinforced concrete or brick-concrete structures is gradually increased. However, the high gloss paint on the surface of the steel structure of the building causes light pollution to some extent.
With the development of society and the improvement of the living standard of residents, the environmental protection policy of the public for improving the quality of good life is improved. Coating materials and coating processes are also increasingly tending to be environment-friendly so as to avoid causing adverse effects on environmental ecology and resident life. With the change of aesthetic concepts of people, more and more people pursue the beautiful texture, softness and beauty of the structural protective coating film. The decorative effect of the matt protective coating is not good enough, and visual enjoyment cannot be brought, so that the demand of low-gloss steel structure finish paint or primer-topcoat paint is increasing day by day.
In order to reduce the gloss of a coating film, matting is often performed by adding a matting agent, talc, bentonite, or the like to a coating material. Although the aim of extinction can be achieved by means of the addition of additives, the disadvantages are also very obvious: (1) the addition of the flatting agent changes the rheological property of the coating; (2) coagulation of the composition results in a seedy appearance; (3) the brittleness of the coating is increased, and the coating is easy to break and fall off; (4) the precipitation of the matting agent can lead to uneven mixing and uneven application of the coating, thereby causing differences in gloss in different areas of the overall coating; (5) resistance to rubbing, bending and rubbing is reduced.
CN103242739A discloses a steel structure protective paint integrating rust prevention, corrosion prevention and decoration, siloxane groups are introduced to the main chain structure of film-forming resin epoxy linolenyl oil ester or soya-oleic acid alkyd resin by a copolymerization method, and a silicon dioxide gloss regulator is added for extinction. The synthesis process of the epoxy ester comprises the following steps: firstly, performing esterification on epoxy resin, linseed oil, a catalyst of zinc oxide and xylene at high temperature to obtain an epoxy ester prepolymer, and further esterifying the epoxy ester prepolymer and a silicon resin oligomer containing segment hydroxyl to obtain a graft copolymerization type silicon modified epoxy ester polymer. The synthesis process of the silicon modified soybean oil alkyd resin of the finish paint comprises the following steps: firstly, hydrolyzing and polycondensing vinyl trimethoxy silane and methacryloxypropyl trimethoxy silane to obtain hydroxyl oligomeric silicon resin, and then esterifying the hydroxyl oligomeric silicon resin and soya-oleic acid oligomeric alkyd resin to synthesize the graft copolymerized silicon modified alkyd resin. The method uses dimethylbenzene as a reflux solvent, and the coating contains benzene series substances, so that the method does not meet the requirement of environmental protection; the introduction of the silicone resin improves the water resistance of the coating, but has negative effects on the defoaming performance of the original paint and the recoating performance of the coating, thereby influencing the construction adaptability of the original paint.
In the research on the preparation and performance of a high-salt-spray-resistance high-gloss primer-topcoat water-based automobile paint, it is reported in the first article (plating and coating 2019, 10 th stage) that the gloss of a paint film can be improved by selecting a high-refractive-index epoxy ester modified acrylic resin 3EA42Y to be matched with a chemically inert ultrafine barium sulfate powder material, but the 3EA42Y resin has strong peculiar smell, and a preparation method of the 3EA42Y resin is not disclosed, and a low-gloss paint is not disclosed.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provide the low-gloss water-based epoxy ester coating for the steel structure, which has the advantages of good storage stability of raw paint, low coating film gloss and safe and environment-friendly process materials.
The invention further aims to solve the technical problem of providing a preparation method of the low-gloss water-based epoxy ester coating for the steel structure, which is simple and convenient to operate.
The invention solves the technical problem by adopting the technical scheme that the low-gloss water-based epoxy ester coating for the steel structure is prepared from vinyl modified epoxy ester resin, pigment and filler, an auxiliary agent, a cosolvent and deionized water; the vinyl modified epoxy ester resin is prepared by the following method: firstly, esterifying with bisphenol A epoxy resin, drying oil fatty acid and a catalyst, and then diluting with tert-carbonic acid glycidyl ester and ethylene glycol monobutyl ether to obtain a prepolymer A; esterifying with alkenyl phenol polyglycidyl ether, dry oil fatty acid, branched chain saturated fatty acid and catalyst, and diluting with polyalkyl-substituted mono-epoxy active diluent and ethylene glycol monobutyl ether to obtain prepolymer B; and then, carrying out graft modification on the prepolymer A and the prepolymer B by using terpene resin, liquid polybutadiene, a vinyl monomer and an initiator to obtain the vinyl modified epoxy ester resin.
Further, the cosolvent is an alcohol ether compound; the alcohol ether compound is one or more of ethylene glycol butyl ether, propylene glycol methyl ether and propylene glycol butyl ether.
Further, the auxiliary agent comprises a neutralizing agent, a drier, an anti-skinning agent, a dispersing agent, a defoaming agent, a thickening agent, a leveling agent, a wetting agent and an anti-flash rust agent.
Further, the pigment and filler is one or more of barium sulfate, titanium dioxide, iron oxide red, carbon black, lemon yellow and phthalocyanine blue.
Further, the bisphenol A type epoxy resin has an epoxy equivalent of 450-550; the bisphenol A type epoxy resin is one or more of NPES-901, EPON-1001, Araldite GT 7071, Epotof37-301 and CYD-011.
Further, the drying oil fatty acid is a mixture of conjugated fatty acid and non-conjugated fatty acid, and the average conjugated double bond content of the mixture is 15-26%.
Further, the drying oil fatty acid is preferably one or more of DCO-FA (produced by iyu oil of japan), Pamolyn 300 (produced by iseman, usa), Pamolyn 380 (produced by iseman, usa), and Nouracid HE303 (produced by eurolan, belgium), Nouracid DE656 (produced by eurolan, belgium).
Further, the iodine value of the drying oil fatty acid was 138-178.
Further, the alkenyl phenol polyglycidyl ether has an epoxy equivalent weight of 500-1000, for example NC-547 (produced by Kadela, USA).
Further, the acid values of the prepolymer A and the prepolymer B are 5 to 9 mgKOH/g.
Further, the mass ratio of the prepolymer A to the prepolymer B is (6-10): 1.
Further, in the prepolymer A and the prepolymer B, the catalysts used are both organic tin compounds; the catalyst is TMG 256 (manufactured by Gaosmidt) or FASCAT4100 (manufactured by PMC group Permes chemical Co., USA).
Further, the branched saturated fatty acid has a carbon number of C9-15, such as 3,5, 5-trimethylhexanoic acid or neodecanoic acid.
Further, the dosage of the branched chain saturated fatty acid accounts for 30-35% of the total mole number of the fatty acid. If the dosage of the branched chain saturated fatty acid is too high, the reaction time is longer, and the proportion of the drying oil fatty acid is low, so that the coating film is not dried; if the amount of the branched saturated fatty acid is too low, the effects of reducing the viscosity of the resin and improving the gloss of the coating film are not sufficiently achieved.
Further, the polyalkyl-substituted mono-epoxy reactive diluent is a tertiary carbonate such as Cardura E10P (Vast. USA).
Further, the terpene resin has a bromine number of 23 to 63 and a softening point of 95 to 135 ℃.
Further, the terpene resin is Piccolyte a115 (manufactured by pinova usa) and/or Piccolyte a125 (manufactured by pinova usa).
Further, the viscosity of the liquid polybutadiene is 300-900 mPa.s (20 ℃), and the iodine value is 360-450.
Further, the liquid polybutadiene was Polyvest130 (Germany winning).
Further, the terpene resin accounts for 3-5% of the total amount of the vinyl monomer. The terpene resin is used in an excessively high amount, so that the coating film has high hardness and insufficient toughness; when the amount of the terpene resin is too low, the compatibility between the resins is not sufficiently adjusted, and thus the gloss of the coating film cannot be effectively adjusted.
Further, the mass of the liquid polybutadiene is 0.3 to 1.5% of the total amount of the vinyl monomer. The use amount of the liquid polybutadiene is too high, so that the viscosity of the resin is obviously increased, even the resin is gelatinized, the stable production is not facilitated, and the subsequent use is inconvenient; too low an amount of liquid polybutadiene is insufficient to adjust the compatibility between resins, and thus the gloss of the coating film cannot be effectively adjusted.
Further, the initiator is one or more of tert-butyl peroxy-2-ethyl hexanoate (TBPO), tert-amyl peroxybenzoate (TAPB) and di-tert-butyl peroxide (DTBP).
Further, the modified epoxy ester resin is prepared by grafting and modifying 1000 parts of a mixture of prepolymer A and prepolymer B with the solid content of 50-70% by using a mixture of terpene resin, liquid polybutadiene, 425-475 parts of vinyl monomer and 10-16 parts of initiator.
The excessive use amount of the vinyl monomer can weaken grafting efficiency, so that the compatibility is reduced, even if a coating film after resin paint preparation is completely dull, double bonds on dry oil fatty acid can be consumed, and the drying performance of the coating film is negatively influenced; the use amount of the vinyl monomer is too small to form coating protection on the modified epoxy ester resin, and the hydrolytic stability of ester bonds is influenced, so that the storage stability of the coating is reduced, and the compatibility between the prepolymer and the graft modification component is difficult to adjust, so that the gloss of the coating cannot be effectively adjusted.
Further, the vinyl monomer is preferably styrene, methyl methacrylate, butyl acrylate, acrylic acid and methoxy-PEG 350 methacrylate.
Further, the mass ratio of the styrene, the methyl methacrylate, the butyl acrylate, the acrylic acid and the methoxy-PEG 350 methacrylate is preferably (35-45): (22-26): (18-22): (11-15): (3-5).
The styrene can obviously improve the glossiness and water resistance of the coating, but the weather resistance is poor, and if the styrene is used in too much amount, the compatibility is reduced, so that the resin is turbid; the methyl methacrylate can improve the weather resistance of the coating; the butyl acrylate has wide compatibility with various monomers, is favorable for adjusting the polymerization activity of the monomers and improving the water resistance of a coating; the acrylic acid is beneficial to introducing a tertiary carbonic acid structure so as to reduce the viscosity of the resin and improve the weather resistance of the coating film, and is beneficial to balancing the hydrophilicity and the water resistance of the coating film; the methacrylic acid methoxyl-PEG 350 ester can effectively enhance the self-emulsifying property of the resin and improve the luster of a coating.
The invention further solves the technical problem by adopting the technical scheme that the preparation method of the low-gloss water-based epoxy ester coating for the steel structure comprises the following steps:
(1) preparation of prepolymer a: reacting bisphenol A epoxy resin, dry oil fatty acid and a catalyst for 3.5-5.5 hours at the temperature of 180 ℃ and 200 ℃ in a nitrogen atmosphere, cooling to 120-140 ℃ when the acid value reaches 5-9mgKOH/g, adding ethylene glycol butyl ether and polyalkyl substituted monoepoxy active diluent for dilution to obtain a prepolymer A with the solid content of 50-70%;
(2) preparation of prepolymer B: reacting alkenyl phenol polyglycidyl ether, dry oil fatty acid, branched chain saturated fatty acid and a catalyst at the temperature of 180 ℃ and 200 ℃ for 3.5-5.5 hours in a nitrogen atmosphere, cooling to 120-140 ℃ when the acid value reaches 5-9mgKOH/g, adding polyalkyl-substituted mono-epoxy active diluent and ethylene glycol butyl ether, and diluting to obtain a prepolymer B with the solid content of 50-70%;
(3) preparation of vinyl modified epoxy ester resin: dropwise adding a mixture of styrene, methyl methacrylate, butyl acrylate, acrylic acid, methoxy-PEG 350 methacrylate and 75-85% (preferably 80%) of an initiator (based on the total amount of the initiator) into the mixture of the prepolymer A obtained in the step (1) and the prepolymer B obtained in the step (2) within 3.5-4.5h at the temperature of 150-;
(4) preparation of the coating: taking the vinyl modified epoxy ester resin obtained in the step (3) as a base material, adding an auxiliary agent neutralizer, deionized water (preferably 55-65% of the total mass, more preferably 60%) and a cosolvent into the base material (55-75% of the total mass of the base material), stirring at the rotation speed of 400-600rpm (preferably 500 rpm) for 15-25min, adding an auxiliary agent drier and an auxiliary agent anti-skinning agent at the rotation speed of 600-1000rpm (preferably 800 rpm), uniformly dispersing, adjusting the rotation speed to 400-600rpm (preferably 500 rpm), adding an auxiliary agent dispersant and an auxiliary agent high-shear defoamer, uniformly dispersing, adjusting the rotation speed to 800-1200rpm (preferably 1000 rpm), adding a pigment and a filler, dispersing to a sand mill barrel without bottom settlement and agglomeration, flushing residual materials with part of deionized water (preferably 8-12% of the total mass, more preferably 10%), adding a grinding medium into the sand mill barrel, grinding at 2800-;
(5) and (3) filtering and discharging the slurry obtained in the step (4), adding an auxiliary thickener, an auxiliary low-shear defoaming agent, an auxiliary leveling agent, an auxiliary wetting agent, an auxiliary anti-flash rust agent, deionized water (preferably 15-25% of the total mass and more preferably 20%) and the balance of modified epoxy ester resin, uniformly dispersing at the rotation speed of 600 plus one year (preferably 800 rpm), adjusting the viscosity to 75-95KU by using the balance of deionized water, discharging and packaging to obtain the low-gloss water-based epoxy ester coating product for the steel structure.
Further, in the step (4), the neutralizing agent is an organic amine; the organic amine is one or more of ammonia water, triethylamine and dimethylethanolamine.
Further, in step (4), the drier is a cobalt salt and/or zirconium salt mixture, such as ADDITOL VXW 6206.
Further, in the step (4), the anti-skinning is a ketoxime compound, such as methyl ethyl ketoxime.
Further, in step (4), the dispersant is an acrylic block copolymer, such as Dispex Ultra PX 4585 (basf, germany) and/or Tego Dispers 655 (win-win, germany).
Further, in step (4), the high shear defoamer is suitable for grinding in polyether modified silicone solution, high shear system and aqueous color paste, such as AFCONA 2502.
Further, in step (5), the thickener is polyurethane-associated, such as one or more of RM-2020 (Dow USA), RM-8W (Dow USA), SN-612, DeuRheo WT-105A (Dehumming Hamming products) and Vesmody _ U605 (Vaawa Chemicals).
Further, in step (5), the medium-low shear defoaming agent is a polyether siloxane copolymer, such as TEGO Airex 902W (German winning) and/or Foamex 845 (German winning).
Further, in step (5), the leveling agent is a polyether modified silicone, such as BYK-333 (bethek, germany) and/or W-461 (courteum).
Further, in step (5), the wetting agent is a modified silicone polymer, such as ADDITOL XW 330 and/or TEGO Wet KL 245.
Further, in the step (5), the flash rust inhibitor is an organic metal chelate, such as FA 179.
Compared with the prior art, the invention has the beneficial effects that: (1) the raw lacquer is stable to store; (2) the early water resistance is good; (3) the coating film has soft gloss and is adjustable in a certain range; no benzene series harmful substances.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be noted that these examples should not be construed as limiting the scope of the claims of the present application. All other changes and modifications which can be made by one skilled in the art based on the embodiments of the present invention without inventive faculty are within the scope of the claims of the present application.
The chemical reagents used in the examples of the present invention, unless otherwise specified, are commercially available in a conventional manner.
Example 1
This example is a low gloss water-based epoxy ester coating for steel structures, which comprises 312g of vinyl-modified epoxy ester resin, 11g of dimethylethanolamine, 9g of aqueous ammonia (28% by mass), 4g of Dispex Ultra PX 4585 (Pasteur, Germany), 10g of butyl propylene glycol ether, 3.6g of drier ADDITIOL VXW 6206 (New product, Thailand), 2.0g of methyl ethyl ketone oxime, 1.2g of AFCONA2502 (New product, Effolkonne), and 6.0g of lemon yellow, 1.0g of iron oxide red, 88g of titanium dioxide, 5.0g of MA-100 carbon black (produced by Mitsubishi Japan), 180g of superfine barium sulfate (produced by Murray Hunan province), 1.0g of defoamer TEGO Airex 902W (produced by winning Germany), 5.0g of flash rust inhibitor FA179 (produced by Demodex Heming), 1.5g of BYK-333 leveling agent (produced by Bike Germany), 1.5g of wetting agent ADDITOL XW 330 (produced by Thailand UK newly), 2.0g of thickener DeuRheo WT-105A (produced by Demodex Heming) and 500g of deionized water.
The preparation method of the low gloss type waterborne epoxy ester coating for the steel structure comprises the following steps:
(1) preparation of prepolymer a: adding 320g CYD-011 (the tomine petrochemical product), 160g dehydrated ricinoleic acid (produced by Itania japonica oil), 160g phaseoleic acid (produced by Wuhanlin Seisaku), 60g Pamolyn 380 (produced by Itania americana) and 0.3g Fascat4100 (produced by Pims chemical products), starting stirring, heating to 180 ℃, slowly heating to 200 ℃ within 2h, cooling to 130 ℃ after the acid value is reduced to 5-9mgKOH/g, adding 150g propylene glycol butyl ether and 15g E10P (produced by Hansen americana), and diluting to obtain prepolymer A with the solid content of 65%;
(2) preparation of prepolymer B: 381g of NC-547 (produced by Kadelian America), 81g of dehydrated ricinoleic acid (produced by Itania Japan), 90g of soya-oleic acid (produced by Wuhangseisai), 50g of Pamolyn 380 (produced by Itania America), 38g of isononanoic acid (produced by Japan K.K.) and 0.3g of Fascat4100 (produced by U.S. Pims chemical) are added into a four-neck round-bottomed flask provided with a mechanical stirrer, a packed column, a condenser pipe, a water separator and a temperature sensor, stirring is started, the temperature is increased to 180 ℃, the temperature is slowly increased to 200 ℃ within 2h, the temperature is reduced to 130 ℃ after the acid value is reduced to 5-9mgKOH/g, 150g of propylene glycol butyl ether and 15g of E10P (produced by U.S. Saussian) are added, and diluted, so that prepolymer B with the solid content of 65% is obtained;
(3) preparation of vinyl modified epoxy ester resin: adding 420g of prepolymer A, 70g of prepolymer B, 10g of Piccolyte A125 (produced by Pinova USA) and 1g of Polyvest130 (produced by Yingchuang Germany) into a base material, heating to 150 ℃, dropwise adding a mixture of 80g of styrene (produced by Maocai petrochemical industry), 50g of methyl methacrylate (produced by Shanghai Huayi), 50g of butyl acrylate (produced by Qilu petrochemical industry), 30g of acrylic acid (produced by Shanghai Huayi) and 8.0g of DTBP (produced by Normal mature Akema) into the base material for 4.5-5.5h, and keeping the temperature for 1h at 150 ℃; adding 1.2g of DTBP and 10g of PnB, and keeping the temperature at 150 ℃ for 1 h; supplementing 1.2g of TBPO and 10g of PnB for the second time, and keeping the temperature at 129 ℃ for 1 h; then, the temperature is reduced to 100 ℃, sampling detection is carried out, and the solid content is adjusted to 77 percent, so as to obtain the vinyl modified epoxy ester resin;
(4) preparation of the coating: adding 11g of dimethylethanolamine, 200g of deionized water and 10g of propylene glycol butyl ether into 230g of the modified epoxy ester resin obtained in the step (3), stirring at the rotating speed of 500rpm for 20min, adding 3.6g of drier ADDITIOL VXW 6206 and 2.0g of methyl ethyl ketoxime at the rotating speed of 800rpm, adjusting the rotating speed to 500rpm after uniform dispersion, adding 4g of dispersant Dispex Ultra PX 4585 (produced by Pasteur Germany), 1.2g of defoamer AFCONA2502 (produced by Netherlands Elekoni), adjusting the rotating speed to 1000rpm after uniform dispersion, adding 6.0g of lemon yellow, 1.0g of iron red, 88g of titanium white, 5.0g of MA-100 carbon black (produced by Nippon Mitsubishi) and 180g of ultrafine barium sulfate (produced by Hunan Ruili stone), transferring the mixture into a sand mill after dispersion until no sediment and no agglomeration, and washing the rest materials by 50g of deionized water, adding a grinding medium into a sand grinding cylinder, and grinding at the rotating speed of 2950rpm until the fineness of the slurry is 30 mu m to obtain the slurry;
(5) and (3) filtering and discharging the slurry obtained in the step (4), adding 2.0g of a thickening agent DeuRheo WT-105A (a modest product), 1.0g of a defoaming agent TEGO Airex 902W (a winning and creating product in Germany), 1.5g of a flatting agent BYK-333 (a bike product in Germany), 1.5g of a wetting agent TEGO Wet KL245, 5.0g of a flash rust inhibitor FA179, 30g of deionized water, 822g of modified epoxy ester resin and 9g of ammonia water (28%), uniformly dispersing at the rotating speed of 800rpm, adjusting the viscosity to 85KU by using 20g of (adjustable) deionized water, filtering, discharging and packaging to obtain the low-gloss water-based epoxy ester coating product for the steel structure.
Example 2
The low gloss water-based epoxy ester coating for steel structure of this example was prepared from 312g of vinyl-modified epoxy ester resin, 11g of dimethylethanolamine, 9g of ammonia (28% by mass), 4g of Tego Dispers 655 (winning and creating in Germany), 10g of propylene glycol butyl ether, 3.6g of drier ADDITIOL VXW 6206 (newly manufactured by Thailand), 2.0g of methyl ethyl ketoxime, 1.2g of AFCONA2502 (manufactured by Effolk in the Netherlands), and 6.0g of lemon yellow, 1.0g of iron oxide red, 88g of titanium dioxide, 5.0g of MA-100 carbon black (produced by Mitsubishi Japan), 180g of superfine barium sulfate (produced by Hunan rui stone), 1.0g of defoamer Foamex 845 (produced by Wright chemical industry), 5.0g of flash rust inhibitor FA179 (produced by Delumei Haimines), 1.5g of flatting agent BYK-333 (produced by Bick Germany), 1.5g of wetting agent Vesmody _ U605 (produced by Wanhua chemical industry), 2.0g of thickener TEGO Visco plus 3000 (produced by Wright chemical industry Germany) and 500g of deionized water.
In the preparation of the vinyl-modified epoxy ester resin of this example, prepolymer B was prepared by replacing 38g of isononanoic acid (manufactured by Nippon corporation) with 41.4g of neodecanoic acid (manufactured by Tetrakis Hebei); the vinyl-modified epoxy ester resin was prepared by replacing 10g of Piccolyte A125 (manufactured by Pennogawa USA) with 10g of A115 (manufactured by Pennogawa USA). The preparation method of the low gloss waterborne epoxy ester coating for the steel structure of the embodiment is the same as that of the embodiment 1.
And (3) performance detection: the performance of the low gloss waterborne epoxy ester coating for the steel structure of the embodiment 1-2 and the commercially available coating of a certain brand were tested, and the test results are shown in Table 1.
TABLE 1 examples 1-2 paint products and commercially available paints for performance testing
The result shows that the low-gloss water-based epoxy ester coating for the steel structure has good storage stability, high drying speed of a coating film, soft and moderately adjustable luster and excellent early water resistance; in addition, the resin finished product in this embodiment does not contain toxic and harmful substances such as benzene, toluene, xylene (containing ethylbenzene), and the like, and does not cause contact damage of benzene series to coating operators.
Claims (18)
1. The low-gloss waterborne epoxy ester coating for the steel structure is characterized by being prepared from vinyl modified epoxy ester resin, pigment and filler, an auxiliary agent, a cosolvent and deionized water;
the vinyl modified epoxy ester resin is prepared by the following method: firstly, esterifying with bisphenol A epoxy resin, drying oil fatty acid and a catalyst, and then diluting with tert-carbonic acid glycidyl ester and ethylene glycol monobutyl ether to obtain a prepolymer A; esterifying with alkenyl phenol polyglycidyl ether, dry oil fatty acid, branched chain saturated fatty acid and catalyst, and diluting with polyalkyl-substituted mono-epoxy active diluent and ethylene glycol monobutyl ether to obtain prepolymer B; then, terpene resin, liquid polybutadiene, vinyl monomer and initiator are used for carrying out graft modification on the prepolymer A and the prepolymer B, and vinyl modified epoxy ester resin is obtained; the drying oil fatty acid is a mixture of conjugated fatty acid and non-conjugated fatty acid; the mass of the terpene resin is 3-5% of the total amount of the vinyl monomer; the mass of the liquid polybutadiene is 0.3-1.5% of the total amount of the vinyl monomer; the modified epoxy ester resin is prepared by grafting and modifying 1000 parts of a mixture of prepolymer A and prepolymer B with the solid content of 50-70% by using 475 parts of terpene resin, liquid polybutadiene, 425-vinyl monomer and 10-16 parts of initiator.
2. The low gloss waterborne epoxy ester coating for the steel structure as claimed in claim 1, wherein the epoxy equivalent of the bisphenol A epoxy resin is 450-550 g/eq; the bisphenol A type epoxy resin is one or more of NPES-901, EPON-1001, Araldite GT 7071, Epotof37-301 and CYD-011.
3. The low gloss waterborne epoxy ester coating for steel structures according to claim 1 or 2, wherein the average conjugated double bond content of the mixture is 15-26%; the drying oil fatty acid is one or more of DCO-FA, Pamolyn 300, Pamolyn 380, Nouracid HE303 and Nouracid DE 656; the iodine value of the drying oil fatty acid is 138-178.
4. The low gloss waterborne epoxy ester coating for steel structures according to claim 1 or 2, wherein the acid value of prepolymer A and prepolymer B is 5-9 mgKOH/g; the mass ratio of the prepolymer A to the prepolymer B is (6-10): 1.
5. The low gloss waterborne epoxy ester coating for steel structures of claim 3, wherein the acid value of prepolymer A and prepolymer B is 5-9 mgKOH/g; the mass ratio of the prepolymer A to the prepolymer B is (6-10): 1.
6. The low gloss waterborne epoxy ester coating for the steel structure according to claim 1 or 2, wherein the carbon number of the branched chain saturated fatty acid is 9-15, and the amount of the branched chain saturated fatty acid accounts for 30-35% of the total mole number of the fatty acid.
7. The low gloss waterborne epoxy ester coating for the steel structure according to claim 3, wherein the carbon number of the branched chain saturated fatty acid is 9-15, and the amount of the branched chain saturated fatty acid accounts for 30-35% of the total mole number of the fatty acid.
8. The low gloss waterborne epoxy ester coating for the steel structure according to claim 1 or 2, wherein the terpene resin has a bromine number of 23-63 and a softening point of 95-135 ℃; the viscosity of the liquid polybutadiene is 300-900 mPa.s, and the iodine value is 360-450.
9. The low gloss waterborne epoxy ester coating for steel structures of claim 3, wherein the terpene resin has a bromine number of 23-63 and a softening point of 95-135 ℃; the viscosity of the liquid polybutadiene is 300-900 mPa.s, and the iodine value is 360-450.
10. The low gloss waterborne epoxy ester coating for steel structures of claim 6, wherein the terpene resin has a bromine number of 23-63 and a softening point of 95-135 ℃; the viscosity of the liquid polybutadiene is 300-900 mPa.s, and the iodine value is 360-450.
11. The low gloss waterborne epoxy ester coating for the steel structure according to claim 1 or 2, wherein the initiator is one or more of tert-butyl 2-ethyl hexanoate peroxide, tert-amyl peroxybenzoate and di-tert-butyl peroxide.
12. The low gloss waterborne epoxy ester coating for the steel structure according to claim 3, wherein the initiator is one or more of tert-butyl peroxy-2-ethyl hexanoate, tert-amyl peroxybenzoate and di-tert-butyl peroxide.
13. The low gloss waterborne epoxy ester coating for the steel structure according to claim 8, wherein the initiator is one or more of tert-butyl 2-ethyl hexanoate peroxide, tert-amyl peroxybenzoate and di-tert-butyl peroxide.
14. The low gloss waterborne epoxy ester coating for steel structures of claim 1 or 2, wherein the vinyl monomer is styrene, methyl methacrylate, butyl acrylate, acrylic acid, methoxy-PEG 350 methacrylate; the mass ratio of the styrene to the methyl methacrylate to the butyl acrylate to the acrylic acid to the methoxy-PEG 350 methacrylate is (35-45): (22-26): (18-22): (11-15): (3-5).
15. The low gloss waterborne epoxy ester coating for the steel structure according to claim 3, wherein the vinyl monomer is styrene, methyl methacrylate, butyl acrylate, acrylic acid, methoxy-PEG 350 methacrylate; the mass ratio of the styrene to the methyl methacrylate to the butyl acrylate to the acrylic acid to the methoxy-PEG 350 methacrylate is (35-45): (22-26): (18-22): (11-15): (3-5).
16. The low gloss waterborne epoxy ester coating for the steel structure of claim 9, wherein the vinyl monomer is styrene, methyl methacrylate, butyl acrylate, acrylic acid, methoxy-PEG 350 methacrylate; the mass ratio of the styrene to the methyl methacrylate to the butyl acrylate to the acrylic acid to the methoxy-PEG 350 methacrylate is (35-45): (22-26): (18-22): (11-15): (3-5).
17. The low gloss waterborne epoxy ester coating for steel structures of claim 11, wherein the vinyl monomer is styrene, methyl methacrylate, butyl acrylate, acrylic acid, methoxy-PEG 350 methacrylate; the mass ratio of the styrene to the methyl methacrylate to the butyl acrylate to the acrylic acid to the methoxy-PEG 350 methacrylate is (35-45): (22-26): (18-22): (11-15): (3-5).
18. The preparation method of the low gloss water-based epoxy ester coating for the steel structure as claimed in claim 1 or 2, characterized by comprising the following steps:
(1) preparation of prepolymer a: reacting bisphenol A epoxy resin, dry oil fatty acid and a catalyst in a nitrogen atmosphere, cooling, adding ethylene glycol monobutyl ether and tert-carbonic acid glycidyl ester, and diluting to obtain a prepolymer A;
(2) preparation of prepolymer B: reacting alkenyl phenol polyglycidyl ether, dry oil fatty acid, branched chain saturated fatty acid and a catalyst in a nitrogen atmosphere, cooling, adding a polyalkyl-substituted mono-epoxy active diluent and ethylene glycol monobutyl ether, and diluting to obtain a prepolymer B;
(3) preparation of vinyl modified epoxy ester resin: dropwise adding a mixture of a vinyl monomer and an initiator into a mixture of the prepolymer A obtained in the step (1) and the prepolymer B obtained in the step (2), after dropwise adding, carrying out heat preservation reaction, supplementing the initiator and the solvent, and carrying out heat preservation again to obtain a vinyl modified epoxy ester resin;
(4) preparation of the coating: taking the vinyl modified epoxy ester resin obtained in the step (3) as a base material, adding an auxiliary agent neutralizer, deionized water, a cosolvent, an auxiliary agent drier and an anti-skinning agent into the base material, and uniformly dispersing; then adding an auxiliary agent dispersing agent, an auxiliary agent high-shear defoaming agent and pigment fillers for uniform dispersion, and then adding grinding media for grinding to obtain slurry;
(5) and (4) filtering and discharging the slurry obtained in the step (4), adding an auxiliary thickener, an auxiliary medium-low shear defoaming agent, an auxiliary leveling agent, an auxiliary wetting agent, an auxiliary anti-flash rust agent, deionized water and the balance of vinyl modified epoxy ester resin, uniformly dispersing, adjusting the viscosity, discharging and packaging to obtain the low-gloss water-based epoxy ester coating product for the steel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351535.XA CN113980539B (en) | 2021-11-16 | 2021-11-16 | Low-gloss water-based epoxy ester coating for steel structure and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111351535.XA CN113980539B (en) | 2021-11-16 | 2021-11-16 | Low-gloss water-based epoxy ester coating for steel structure and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113980539A CN113980539A (en) | 2022-01-28 |
| CN113980539B true CN113980539B (en) | 2022-05-03 |
Family
ID=79748618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111351535.XA Active CN113980539B (en) | 2021-11-16 | 2021-11-16 | Low-gloss water-based epoxy ester coating for steel structure and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113980539B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB842641A (en) * | 1955-02-24 | 1960-07-27 | Pittsburgh Plate Glass Co | Resinous coating materials |
| CN103342939A (en) * | 2013-06-27 | 2013-10-09 | 天长市巨龙车船涂料有限公司 | Water-soluble epoxy ester antirust paint |
| CN107629191A (en) * | 2017-11-02 | 2018-01-26 | 湘江涂料科技有限公司 | Epoxy-ester prepolymer, preparation method and the water-base epoxy of preparation ester resin and method |
| CN112679682A (en) * | 2020-12-23 | 2021-04-20 | 南京长江涂料有限公司 | Aqueous epoxy ester dispersion, preparation method and application |
-
2021
- 2021-11-16 CN CN202111351535.XA patent/CN113980539B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB842641A (en) * | 1955-02-24 | 1960-07-27 | Pittsburgh Plate Glass Co | Resinous coating materials |
| CN103342939A (en) * | 2013-06-27 | 2013-10-09 | 天长市巨龙车船涂料有限公司 | Water-soluble epoxy ester antirust paint |
| CN107629191A (en) * | 2017-11-02 | 2018-01-26 | 湘江涂料科技有限公司 | Epoxy-ester prepolymer, preparation method and the water-base epoxy of preparation ester resin and method |
| CN112679682A (en) * | 2020-12-23 | 2021-04-20 | 南京长江涂料有限公司 | Aqueous epoxy ester dispersion, preparation method and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113980539A (en) | 2022-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2003203420B2 (en) | Aqueous polymer blend composition | |
| AU2015366910B2 (en) | Aqueous coating composition and process of making the same | |
| AU2018274908B2 (en) | Aqueous dispersion of polymer particles, microspheres, and polyethylene wax | |
| JP5566351B2 (en) | Stable aqueous composite composition | |
| CA2976608C (en) | Aqueous dispersions | |
| CN111138603B (en) | Water-based alkyd-acrylate dispersion and preparation method and application thereof | |
| US10597550B2 (en) | Aqueous polymer dispersion and process of making the same | |
| EP2776484A1 (en) | Process for preparing polyurethane/acrylic hybrid dispersions | |
| US9169380B2 (en) | Use of aqueous polymer dispersions for improving resistance to chemical influences | |
| CN109503738B (en) | Phosphoric acid modified polyisoprene rubber, polyisoprene rubber modified acrylate resin dispersion, preparation method and application | |
| CN107674146B (en) | High-solid-content low-VOC (volatile organic compound) water-based polyacrylate resin and preparation method thereof | |
| CN113980539B (en) | Low-gloss water-based epoxy ester coating for steel structure and preparation method thereof | |
| WO2020154888A1 (en) | Aqueous coating composition | |
| AU2003201284B2 (en) | Polymer composition and monomer composition for preparing thereof | |
| CN114507324B (en) | Water-based acrylic acid modified alkyd hybrid resin, preparation method, coating and application thereof | |
| CN112759720B (en) | Boiling-resistant phosphorus-containing waterborne acrylic modified polyester dispersion resin and preparation method and application thereof | |
| CA3038416C (en) | Aqueous polymer composition | |
| CN114316160A (en) | Acrylic emulsion polymer and preparation method of water-based paint based on polymer | |
| CN113402717A (en) | Water-based epoxy ester-acrylic hybrid resin and preparation method and application thereof | |
| CN114846094A (en) | Water-based paint composition and preparation method thereof | |
| CN112029368B (en) | Bottom-surface-in-one type water-based epoxy ester coating for tower crane standard part and preparation method thereof | |
| US20240093054A1 (en) | Crosslinkable acrylic-modified epoxy coating composition | |
| WO2024138597A1 (en) | Aqueous polymer dispersion and coating composition | |
| WO2020248114A1 (en) | Aqueous dispersion comprising multistage polymer and process of making same | |
| CN115873366A (en) | Low-cost quick-drying type hydroxyl acrylic acid dispersion and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |