CN111253841A - Low-temperature curing outdoor super-weather-resistant and corrosion-resistant powder coating and preparation method thereof - Google Patents
Low-temperature curing outdoor super-weather-resistant and corrosion-resistant powder coating and preparation method thereof Download PDFInfo
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- CN111253841A CN111253841A CN202010166790.6A CN202010166790A CN111253841A CN 111253841 A CN111253841 A CN 111253841A CN 202010166790 A CN202010166790 A CN 202010166790A CN 111253841 A CN111253841 A CN 111253841A
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- 238000000576 coating method Methods 0.000 title claims abstract description 50
- 239000011248 coating agent Substances 0.000 title claims abstract description 48
- 239000000843 powder Substances 0.000 title claims abstract description 47
- 230000007797 corrosion Effects 0.000 title claims abstract description 22
- 238000005260 corrosion Methods 0.000 title claims abstract description 22
- 238000013035 low temperature curing Methods 0.000 title claims description 8
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 229920001225 polyester resin Polymers 0.000 claims abstract description 11
- 239000004645 polyester resin Substances 0.000 claims abstract description 11
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 9
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 9
- 239000002250 absorbent Substances 0.000 claims abstract description 7
- 230000002745 absorbent Effects 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- OUPZKGBUJRBPGC-UHFFFAOYSA-N 1,3,5-tris(oxiran-2-ylmethyl)-1,3,5-triazinane-2,4,6-trione Chemical compound O=C1N(CC2OC2)C(=O)N(CC2OC2)C(=O)N1CC1CO1 OUPZKGBUJRBPGC-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000007873 sieving Methods 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- 239000000049 pigment Substances 0.000 claims description 13
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001723 curing Methods 0.000 claims description 11
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- 239000003431 cross linking reagent Substances 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- LLPKQRMDOFYSGZ-UHFFFAOYSA-N 2,5-dimethyl-1h-imidazole Chemical compound CC1=CN=C(C)N1 LLPKQRMDOFYSGZ-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical group C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 claims description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical group CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 239000004970 Chain extender Substances 0.000 claims description 3
- HJOVHMDZYOCNQW-UHFFFAOYSA-N Isophorone Natural products CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 244000028419 Styrax benzoin Species 0.000 claims description 3
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 3
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 3
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 claims description 3
- 229960002130 benzoin Drugs 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000019382 gum benzoic Nutrition 0.000 claims description 3
- 238000009775 high-speed stirring Methods 0.000 claims description 3
- 125000002883 imidazolyl group Chemical group 0.000 claims description 3
- 125000006838 isophorone group Chemical group 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- -1 polydimethylsiloxane Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000013530 defoamer Substances 0.000 claims description 2
- 238000007590 electrostatic spraying Methods 0.000 claims description 2
- 238000006068 polycondensation reaction Methods 0.000 claims description 2
- 150000007519 polyprotic acids Polymers 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims description 2
- 239000012467 final product Substances 0.000 abstract 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001565 benzotriazoles Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- 150000003254 radicals Chemical group 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- BVFSYZFXJYAPQJ-UHFFFAOYSA-N butyl(oxo)tin Chemical compound CCCC[Sn]=O BVFSYZFXJYAPQJ-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
-
- 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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- 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
- C09D5/08—Anti-corrosive paints
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of powder coatings, and relates to a low-temperature cured outdoor super-weather-resistant corrosion-resistant powder coating which comprises the following components in parts by mass: 100 parts of super-weather-resistant polyester resin, 30-50 parts of precipitated barium sulfate, 5-10 parts of TGIC, 0.1-1 part of ultraviolet absorbent, 0.1-1 part of antioxidant and a plurality of auxiliaries. The invention also provides a preparation method of the powder coating, which comprises the following steps: comprises premixing the components, melting, mixing, tabletting, cooling, crushing, grinding, cyclone separating and sieving to obtain the final product powder. The low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating provided by the invention can be cured at low temperature, so that the energy is saved, and the application range of the powder coating is expanded; meanwhile, the coating has good weather resistance and corrosion resistance.
Description
Technical Field
The invention belongs to the technical field of powder coatings, and relates to a low-temperature cured outdoor super-weather-resistant corrosion-resistant powder coating and a preparation method thereof.
Background
Compared with the traditional solvent-based coating, the powder coating has the advantages of no solvent, high utilization rate, easy realization of automatic production and the like. Meanwhile, the powder coating needs to be baked and cured at high temperature in the construction aspect, generally at 180-200 ℃, which is contrary to the advocation of energy conservation and emission reduction and cannot be applied to coating of heat-sensitive materials. How to reduce the curing temperature of the powder coating to save energy and expand the application range is one of the development directions of the powder coating. In addition, when the powder coating is applied outdoors, the powder coating has quite high requirements on weather resistance and corrosion resistance.
The Chinese patent application CN107083161A discloses an outdoor weather-resistant super-leveling powder coating special for aluminum profiles, which comprises the following components in percentage by mass: 55-75% of carboxyl polyester resin; 4.0 to 5.7 percent of TGIC curing agent; 0.8 to 1.5 percent of flatting agent; 0.5 to 1.0 percent of degasifier; 0.3 to 0.5 percent of antioxidant; 0.5 to 1.0 percent of brightener; 0.5 to 0.8 percent of dispersing auxiliary agent; 0.5 to 1.0 percent of leveling auxiliary agent; 0-12% of modified filler; 25-28% of weather-resistant pigment; the sum of the mass percentages of the components is 100 percent. The powder coating adopts a weather-resistant pigment to improve the super weather resistance of the powder coating, and the effect is not good.
Disclosure of Invention
The invention aims to provide a low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating which can be cured at low temperature, saves energy and expands the application range of the powder coating; meanwhile, the coating has good weather resistance and corrosion resistance.
The purpose of the invention is realized as follows:
the low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating is characterized by comprising the following components in parts by mass: 100 parts of super-weather-resistant polyester resin, 30-50 parts of precipitated barium sulfate, 5-10 parts of TGIC, 0.1-1 part of ultraviolet absorbent, 0.1-1 part of antioxidant and a plurality of auxiliaries.
The super-weather-resistant polyester resin is a high molecular compound formed by polycondensing polyalcohol and polybasic acid, such as neopentyl glycol and terephthalic acid, wherein trimethylolpropane is used as a chain extender in the reaction, the addition amount is 2% by mass of the raw material, and isophthalic acid is used as a capping agent after the reaction, and the addition amount is 10% by mass of the raw material.
The ultraviolet absorbent is selected from triazine or benzotriazole compounds, and the antioxidant is selected from free radical inhibitor, such as antioxidant 1010.
The auxiliary agents comprise hardening wax, a defoaming agent, a leveling agent, a low-temperature accelerator, a cross-linking agent, calcium carbonate and pigment.
The auxiliary agent comprises the following components in parts by mass: 1-5 parts of hardening wax, 0.2-1 part of defoaming agent, 0.1-0.5 part of flatting agent, 0.1-0.5 part of low-temperature accelerator, 0.2-1 part of cross-linking agent, 1-5 parts of calcium carbonate and 5-30 parts of pigment.
The above-mentioned auxiliary agent is selected from: the defoaming agent is benzoin;
the flatting agent is selected from isophorone, diacetone alcohol, polydimethylsiloxane, acrylic resin, urea resin and melamine formaldehyde resin;
the low-temperature accelerator is selected from 2-methylimidazole and 2, 4-dimethylimidazole;
the cross-linking agent is selected from imidazole curing agents and phenolic resin curing agents;
the pigment is selected from titanium dioxide, carbon black, iron oxide red, iron oxide yellow, phthalocyanine blue, phthalocyanine green and ultramarine.
The powder coating is cured by uniformly spraying the powder coating on a substrate by an electrostatic spraying machine and keeping the temperature at 100 ℃ for 15 minutes.
The invention also provides a preparation method of the low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating, which comprises the steps of premixing all the components, and then sequentially carrying out melting, mixing, tabletting, cooling, crushing, grinding, cyclone separation and screening to obtain finished powder.
During premixing, a laminated material proportioning mode is adopted, the materials are put into a turnover mixer in layers to be turned and mixed for 3 times at 180 degrees, and in the process of high-speed stirring and mixing, circulating cooling water is adopted to cool a mixing bin and a blade assembly, so that the temperature in the bin is not higher than 30 ℃ during mixing.
Preferably, the auxiliaries are first mixed and then fed into the tumble mixer.
In the mixing step, a special high-purity polyester mixing screw with the length-diameter ratio of 25:1 is adopted, and meanwhile, a high-precision double-circulation setting temperature control system is adopted to accurately control the temperature of the screw in four regions, and the temperature difference is controlled within +/-1 ℃.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
1. the powder coating provided by the invention can be cured at a low temperature of 100 ℃, and compared with the traditional curing temperature of 180 ℃ and 200 ℃, the powder coating saves the energy consumption for curing. Meanwhile, the powder coating can be applied to heat-sensitive spraying materials which are not high in temperature resistance, and the application range of the powder coating is expanded.
2. Compared with other products, the color retention rate and the light retention rate of the powder coating provided by the invention are improved by nearly one time, and the powder coating is more beneficial to long-term outdoor application. The corrosion resistance is far higher than that of other products of the same type, and the coating is suitable for high-acid-base environments. The shock resistance is excellent, the stability of the coating is effectively ensured, and the coating is not easy to fall off.
Detailed Description
The present invention is further described in the following description of the specific embodiments, which is not intended to limit the invention, but various modifications and improvements can be made by those skilled in the art based on the basic idea of the invention, but the scope of the invention is within the scope of the invention as long as they do not depart from the basic idea of the invention.
The low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating is characterized by comprising the following components in parts by mass: 100 parts of super-weather-resistant polyester resin, 30-50 parts of precipitated barium sulfate, 5-10 parts of TGIC, 0.1-1 part of ultraviolet absorbent, 0.1-1 part of antioxidant and a plurality of auxiliaries.
The ultraviolet absorbent is selected from triazine or benzotriazole compounds, and the antioxidant is selected from free radical inhibitor, such as antioxidant 1010.
The auxiliary agents comprise hardening wax, a defoaming agent, a leveling agent, a low-temperature accelerator, a cross-linking agent, calcium carbonate and pigment.
The auxiliary agent comprises the following components in parts by mass: 1-5 parts of hardening wax, 0.2-1 part of defoaming agent, 0.1-0.5 part of flatting agent, 0.1-0.5 part of low-temperature accelerator, 0.2-1 part of cross-linking agent, 1-5 parts of calcium carbonate and 5-30 parts of pigment.
The above-mentioned auxiliary agent is selected from: the defoaming agent is benzoin;
the flatting agent is selected from isophorone, diacetone alcohol, polydimethylsiloxane, acrylic resin, urea resin and melamine formaldehyde resin;
the low temperature accelerator is selected from 2-methylimidazole and 2, 4-dimethylimidazole;
the cross-linking agent is selected from imidazole curing agents and phenolic resin curing agents;
the pigment is selected from titanium dioxide, carbon black, iron oxide red, iron oxide yellow, phthalocyanine blue, phthalocyanine green and ultramarine.
Examples
Preparation of super weather-resistant polyester resin:
putting neopentyl glycol and terephthalic acid into a reaction device according to a reaction proportion, simultaneously taking monobutyl tin oxide accounting for 0.05 percent of the mass of a reactant as a catalyst, taking trimethylolpropane accounting for 2 percent of the mass of the reactant as a chain extender, filling nitrogen for protection, raising the temperature to 160 ℃, starting esterification, distilling water, controlling the temperature raising speed to 250 ℃, keeping the temperature, reacting to 95 percent of a theoretical value, adding a phthalic acid end-capping agent accounting for 10 percent of the mass of the reactant, reacting for 40-50 minutes at 250 ℃, and carrying out vacuum polycondensation for 40-60 minutes to obtain the super weather-resistant polyester resin.
Preparation of low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating
Preparing the following components in parts by mass: 100 parts of super-weather-resistant polyester resin, 30-50 parts of precipitated barium sulfate, 5-10 parts of TGIC, 0.1-1 part of ultraviolet absorbent, 0.1-1 part of antioxidant, 1 part of hardening wax, 0.5 part of defoamer, 0.3 part of flatting agent, 0.3 part of low-temperature accelerator, 0.5 part of cross-linking agent, 5 parts of calcium carbonate and 25 parts of pigment.
The preparation method comprises the following steps:
1. premixing: the components are put into a turnover mixer in a laminated batching mode in layers for 3-time 180-degree turnover mixing, and the mixing bin and the blade assembly are cooled by circulating cooling water in the high-speed stirring and mixing process, so that the temperature in the bin is not higher than 30 ℃ during the mixing process.
2. Melting and mixing: melting the premixed raw materials in a melting zone of a double-screw extruder, extruding the molten premixed raw materials by the double-screw extruder, adopting a special high-purity polyester mixing screw with the length-diameter ratio of 25:1, and simultaneously adopting a high-precision double-circulation setting temperature control system to accurately control the temperature of a screw barrel in four zones, wherein the temperature difference is controlled within +/-1 ℃.
3. And (3) post-treatment: and sequentially carrying out tabletting, cooling, crushing, grinding, cyclone separation and screening on the extruded materials through a production line to obtain finished powder.
Comparative examples
66 parts of polyester resin, 5 parts of curing agent, 1 part of flatting agent, 0.8 part of degassing agent, 0.3 part of antioxidant, 0.8 part of brightening agent and 25 parts of weather-resistant pigment.
Prepared by conventional premixing, melting, mixing, tabletting, cooling, crushing, grinding, cyclone separation and sieving.
The product performances of the examples and the comparative examples are detected, and the detection methods and the detection results are as follows:
Claims (9)
1. the low-temperature cured outdoor super-weather-resistant and corrosion-resistant powder coating is characterized by comprising the following components in parts by mass: 100 parts of super-weather-resistant polyester resin, 30-50 parts of precipitated barium sulfate, 5-10 parts of TGIC, 0.1-1 part of ultraviolet absorbent, 0.1-1 part of antioxidant and a plurality of auxiliaries.
2. The low-temperature-curable outdoor super-weather-resistant and corrosion-resistant powder coating as claimed in claim 1, wherein the super-weather-resistant polyester resin is a high molecular compound obtained by polycondensation of polyhydric alcohol and polybasic acid, trimethylolpropane is used as a chain extender in the reaction, the addition amount is 2% by mass of the raw material, and isophthalic acid is used as an end-capping agent after the reaction, and the addition amount is 10% by mass of the raw material.
3. The low temperature curing outdoor super weather and corrosion resistant powder coating of claim 1, wherein the auxiliary agents comprise hardening wax, antifoaming agent, leveling agent, low temperature accelerator, crosslinking agent, calcium carbonate, pigment.
4. The low-temperature-curing outdoor super weather-resistant corrosion-resistant powder coating as claimed in claim 3, wherein the auxiliary agent comprises the following components in parts by mass: 1-5 parts of hardening wax, 0.2-1 part of defoaming agent, 0.1-0.5 part of flatting agent, 0.1-0.5 part of low-temperature accelerator, 0.2-1 part of cross-linking agent, 1-5 parts of calcium carbonate and 5-30 parts of pigment.
5. The low temperature cure outdoor-type super weather-resistant corrosion-resistant powder coating of claim 3, wherein the defoamer is benzoin; the flatting agent is selected from isophorone, diacetone alcohol, polydimethylsiloxane, acrylic resin, urea resin and melamine formaldehyde resin; the low-temperature accelerator is selected from 2-methylimidazole and 2, 4-dimethylimidazole; the cross-linking agent is selected from imidazole curing agents and phenolic resin curing agents; the pigment is selected from titanium dioxide, carbon black, iron oxide red, iron oxide yellow, phthalocyanine blue, phthalocyanine green and ultramarine.
6. The low-temperature curing outdoor weather-proof and corrosion-resistant powder coating as claimed in claim 1, wherein the powder coating is cured by uniformly spraying the powder coating on a substrate by an electrostatic spraying machine, and keeping the temperature at 100 ℃ for 15 minutes.
7. The method of claim 1, wherein the method comprises pre-mixing the components, melting, mixing, tabletting, cooling, crushing, grinding, cyclone separating, and sieving to obtain the final powder.
8. The method for preparing the low-temperature curing outdoor weather-resistant and corrosion-resistant powder coating as claimed in claim 7, wherein during pre-mixing, the powder coating is layered and fed into a tumbling mixer in a layered manner for 3 times of 180 ° tumbling mixing, and during the high-speed stirring and mixing, the mixing bin and the blade assembly are cooled by circulating cooling water, so as to ensure that the temperature in the bin is not higher than 30 ℃ during the mixing.
9. The method for preparing the low-temperature curing outdoor type super weather-resistant corrosion-resistant powder coating according to claim 7, wherein a special high-purity polyester mixing screw with a length-diameter ratio of 25:1 is adopted in the mixing step, and meanwhile, a high-precision double-circulation setting temperature control system is adopted to accurately control the temperature of the screw in four regions, and the temperature difference is controlled within +/-1 ℃.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112375472A (en) * | 2020-11-03 | 2021-02-19 | 江阴市玲珑高分子材料有限公司 | High-adhesion super-weather-resistant powder coating and preparation method thereof |
| CN113004769A (en) * | 2021-03-05 | 2021-06-22 | 安徽圣达生物药业有限公司 | Preparation method of salt spray resistant coating |
| CN114836108A (en) * | 2021-02-02 | 2022-08-02 | 中山市董泽粉末涂料有限公司 | Thermosetting powder coating coated on synthetic material product and preparation method thereof |
| CN114907752A (en) * | 2022-06-27 | 2022-08-16 | 江南载福粉末涂料（张家港）有限公司 | Preparation method of low-curing-temperature carboxyl-terminated saturated polyester resin |
| CN116875103A (en) * | 2023-09-08 | 2023-10-13 | 广东腐蚀科学与技术创新研究院 | Nano heat conduction wave absorbing auxiliary agent, low-temperature curing thermosetting powder coating and preparation method and application thereof |
| CN118562344A (en) * | 2024-06-12 | 2024-08-30 | 中山市创渝中涂料科技有限公司 | High-performance low-temperature curing powder coating and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040087736A1 (en) * | 2002-11-04 | 2004-05-06 | Bin Wu | Powder coating compositions containing anhydride end-capped crystalline polyesters |
| CN1662575A (en) * | 2002-05-31 | 2005-08-31 | Ppg工业俄亥俄公司 | Low-cure powder coatings and methods for using the same |
| CN104356892A (en) * | 2014-10-25 | 2015-02-18 | 重庆市金渝管道设备有限公司 | Synthetic method of outdoor low-temperature curing powder coating |
| CN110373096A (en) * | 2019-08-12 | 2019-10-25 | 广东歌丽斯化学有限公司 | A kind of environmental protection and energy saving powdery paints and its preparation method and application |
-
2020
- 2020-03-11 CN CN202010166790.6A patent/CN111253841A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1662575A (en) * | 2002-05-31 | 2005-08-31 | Ppg工业俄亥俄公司 | Low-cure powder coatings and methods for using the same |
| US20040087736A1 (en) * | 2002-11-04 | 2004-05-06 | Bin Wu | Powder coating compositions containing anhydride end-capped crystalline polyesters |
| CN104356892A (en) * | 2014-10-25 | 2015-02-18 | 重庆市金渝管道设备有限公司 | Synthetic method of outdoor low-temperature curing powder coating |
| CN110373096A (en) * | 2019-08-12 | 2019-10-25 | 广东歌丽斯化学有限公司 | A kind of environmental protection and energy saving powdery paints and its preparation method and application |
Non-Patent Citations (3)
| Title |
|---|
| 刘登良: "《涂料工艺 第四版 下册》", 31 January 2010, 化学工业出版社 * |
| 汤明麟等: "超耐候粉末涂料用聚酯树脂的研究", 《涂料工业》 * |
| 顾宇昕等: "固化促进剂在耐候粉末涂料用聚酯树脂中的应用研究", 《现代涂料与涂装》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112375472A (en) * | 2020-11-03 | 2021-02-19 | 江阴市玲珑高分子材料有限公司 | High-adhesion super-weather-resistant powder coating and preparation method thereof |
| CN114836108A (en) * | 2021-02-02 | 2022-08-02 | 中山市董泽粉末涂料有限公司 | Thermosetting powder coating coated on synthetic material product and preparation method thereof |
| CN113004769A (en) * | 2021-03-05 | 2021-06-22 | 安徽圣达生物药业有限公司 | Preparation method of salt spray resistant coating |
| CN114907752A (en) * | 2022-06-27 | 2022-08-16 | 江南载福粉末涂料（张家港）有限公司 | Preparation method of low-curing-temperature carboxyl-terminated saturated polyester resin |
| CN116875103A (en) * | 2023-09-08 | 2023-10-13 | 广东腐蚀科学与技术创新研究院 | Nano heat conduction wave absorbing auxiliary agent, low-temperature curing thermosetting powder coating and preparation method and application thereof |
| CN116875103B (en) * | 2023-09-08 | 2023-12-26 | 广东腐蚀科学与技术创新研究院 | Nano heat conduction wave absorbing auxiliary agent, low-temperature curing thermosetting powder coating and preparation method and application thereof |
| CN118562344A (en) * | 2024-06-12 | 2024-08-30 | 中山市创渝中涂料科技有限公司 | High-performance low-temperature curing powder coating and preparation method thereof |
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