CN111004564A - Extinction low-temperature curing outdoor weather-resistant powder coating - Google Patents
Extinction low-temperature curing outdoor weather-resistant powder coating Download PDFInfo
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- CN111004564A CN111004564A CN201911383735.6A CN201911383735A CN111004564A CN 111004564 A CN111004564 A CN 111004564A CN 201911383735 A CN201911383735 A CN 201911383735A CN 111004564 A CN111004564 A CN 111004564A
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- polyester resin
- carboxyl polyester
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- random
- powder coating
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- 238000000576 coating method Methods 0.000 title claims abstract description 53
- 239000011248 coating agent Substances 0.000 title claims abstract description 47
- 239000000843 powder Substances 0.000 title claims abstract description 39
- 238000013035 low temperature curing Methods 0.000 title claims abstract description 21
- 230000008033 biological extinction Effects 0.000 title claims abstract description 14
- 229920001225 polyester resin Polymers 0.000 claims abstract description 90
- 239000004645 polyester resin Substances 0.000 claims abstract description 90
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 87
- 239000002253 acid Substances 0.000 claims abstract description 53
- 238000001723 curing Methods 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- 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 17
- 238000001125 extrusion Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 4
- 230000000996 additive effect Effects 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims abstract description 3
- 239000000049 pigment Substances 0.000 claims abstract description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 12
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 8
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 8
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims description 8
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 8
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 230000009477 glass transition Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Natural products OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 5
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 4
- 239000001361 adipic acid Substances 0.000 claims description 4
- 235000011037 adipic acid Nutrition 0.000 claims description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 4
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 4
- 239000011976 maleic acid Substances 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- 239000001384 succinic acid Substances 0.000 claims description 4
- 150000005846 sugar alcohols Polymers 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- -1 isocyanuric acid glycidyl ester Chemical class 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- PXGZQGDTEZPERC-UHFFFAOYSA-N 1,4-cyclohexanedicarboxylic acid Chemical compound OC(=O)C1CCC(C(O)=O)CC1 PXGZQGDTEZPERC-UHFFFAOYSA-N 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 2
- 150000007519 polyprotic acids Polymers 0.000 claims description 2
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 244000028419 Styrax benzoin Species 0.000 description 2
- 235000000126 Styrax benzoin Nutrition 0.000 description 2
- 235000008411 Sumatra benzointree Nutrition 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229960002130 benzoin Drugs 0.000 description 2
- 235000019382 gum benzoic Nutrition 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- QRQMCETUBHKRQD-UHFFFAOYSA-N 2,2,3-triphenyl-1,4-dioxane Chemical compound O1CCOC(C=2C=CC=CC=2)(C=2C=CC=CC=2)C1C1=CC=CC=C1 QRQMCETUBHKRQD-UHFFFAOYSA-N 0.000 description 1
- HUKPVYBUJRAUAG-UHFFFAOYSA-N 7-benzo[a]phenalenone Chemical compound C1=CC(C(=O)C=2C3=CC=CC=2)=C2C3=CC=CC2=C1 HUKPVYBUJRAUAG-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 206010057040 Temperature intolerance Diseases 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000001031 chromium pigment Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 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 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- LDHBWEYLDHLIBQ-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide;hydrate Chemical compound O.[OH-].[O-2].[Fe+3] LDHBWEYLDHLIBQ-UHFFFAOYSA-M 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 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
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses an extinction low-temperature curing outdoor weather-resistant powder coating which comprises the following raw materials: the polyester resin comprises high-acid-value semi-crystalline carboxyl polyester resin, random carboxyl polyester resin, a glycidyl isocyanurate curing agent, an additive and/or a pigment filler, wherein the random carboxyl polyester resin is low-temperature curing type random carboxyl polyester resin. The invention can be prepared by a one-step extrusion method, can realize low-temperature curing extinction at 140 ℃, has stable extinction effect, and has good outdoor weather resistance and storage stability.
Description
Technical Field
The invention relates to the technical field of powder coatings, in particular to an extinction low-temperature curing outdoor weather-resistant powder coating.
Background
The powder coating is a coating with 100 percent of solid components, has almost zero VOC (volatile organic compounds) which is different from the traditional solvent-based and water-based coatings, has no solvent pollution, is more energy-saving and environment-friendly, and is an environment-friendly coating. Also for this reason, the market share of powder coatings is rapidly increasing today with increasingly stringent VOC emission standards and driven by the trend of "paint to powder".
The powder coating can be coated on different types of base materials, such as metal base materials, such as bare steel, phosphated steel, galvanized steel, aluminum materials and the like, and the materials are base materials with very good high-temperature resistance and can not deform due to high temperature, so that the heat sensitivity of workpieces is not generally worried when the powder coating is coated on the metal base materials. Moreover, the research on the powder coating needing high-temperature baking and curing conditions has been well developed, and the requirements on various properties of the coating, such as gloss, leveling property, impact resistance and the like, can be met.
Non-metal substrates (heat-sensitive substrates) such as plastics, wood, Medium Density Fiberboard (MDF) and the like do not have as good high temperature resistance as metal substrates, and can cause severe deformation of the substrates under high temperature conditions, so that the powder coating which can be cured by high-temperature baking is difficult to be coated on the heat-sensitive substrates. It is desirable to find a powder coating that can be cured at low temperatures to meet the above-mentioned requirements for heat-sensitive substrates.
In recent years, there have been a number of attempts in the coating field to apply powder coatings to non-metallic substrates (heat-sensitive substrates). For example, wooden articles such as furniture, toys, doors, windows, etc. need to be painted to protect or decorate the substrate. Although powder coatings have achieved some success in the field of low temperature curing, there are still a number of technical disadvantages. First, lower curing temperatures can lead to inadequate mechanical properties of the coating, reduced leveling ratings and reduced scratch resistance of the coating. Secondly, the low-temperature curing condition is difficult to realize the effective control of the coating gloss, and the existing low-temperature curing product is generally a high-gloss or semi-gloss product and cannot realize low gloss.
As described in US6022927, the polyester/TGIC system powder coatings, which can be cured at 148.9 ℃ in the presence of a catalyst, have a gloss of more than 75% (incident angle 60 ℃) and a surface with a severe orange peel, are incorporated herein by reference.
Therefore, it is very urgent to prepare a powder coating with low gloss and low temperature curing under the condition of ensuring the leveling property and the due mechanical property of the coating.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an extinction low-temperature curing outdoor weather-resistant powder coating which can be prepared by a one-step extrusion method, can realize low-temperature curing extinction at 140 ℃, has a stable extinction effect, and has good outdoor weather resistance and storage stability.
The invention provides an extinction low-temperature curing outdoor weather-resistant powder coating which comprises the following raw materials: the polyester resin comprises high-acid-value semi-crystalline carboxyl polyester resin, random carboxyl polyester resin, a glycidyl isocyanurate curing agent, an additive and/or a pigment filler, wherein the random carboxyl polyester resin is low-temperature curing type random carboxyl polyester resin.
The low-temperature curing type random carboxyl polyester resin can be subjected to crosslinking reaction with a corresponding glycidyl isocyanurate curing agent at a lower temperature (less than or equal to 160 ℃) to realize the curing effect.
Preferably, the random carboxyl polyester resin is prepared by condensing dibasic acid and polyalcohol.
Preferably, the dibasic acids include: terephthalic acid, isophthalic acid, 1, 4-cyclohexyldicarboxylic acid, adipic acid, maleic acid or succinic acid.
Preferably, the polyol comprises: ethylene glycol, diethylene glycol, propylene glycol, hexanediol, neopentyl glycol, cyclohexyldimethanol or trimethylolpropane.
Preferably, the high acid number semi-crystalline carboxyl polyester resin is formed by condensation of a polybasic acid and a polyhydric alcohol.
Preferably, the polyacid comprises: terephthalic acid, isophthalic acid, 1, 4-cyclohexanedicarboxylic acid, 1, 4-succinic acid, adipic acid, citric acid, trimellitic anhydride, maleic acid or succinic acid.
Preferably, the polyol comprises: ethylene glycol, diethylene glycol, 1, 4-butanediol, hexanediol, cyclohexyldimethanol or trimethylolpropane.
Preferably, the random carboxyl polyester resin has a weight average molecular weight of 1000-40000.
Preferably, the random carboxyl polyester resin has a weight average molecular weight of 1500-10000.
Preferably, the weight average molecular weight of the random carboxyl polyester resin is 3000-6000.
Preferably, the random carboxyl polyester resin has an acid number in the range of 10 to 100mg KOH/g.
Preferably, the acid value of the random carboxyl polyester resin is in the range of 20 to 80mg KOH/g.
Preferably, the random carboxyl polyester resin has an acid number in the range of 25 to 40mg KOH/g.
Preferably, the glass transition temperature Tg of the random carboxyl polyester resin is from 40 to 80 ℃.
Preferably, the glass transition temperature Tg of the random carboxyl polyester resin is from 45 to 65 ℃.
Preferably, the glass transition temperature Tg of the random carboxyl polyester resin is from 50 to 65 ℃.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has a weight average molecular weight of 1000-20000.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has a weight average molecular weight of 1500-8000.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has a weight average molecular weight of 2000-5000.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has an acid number in the range of 70 to 150mg KOH/g.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has an acid number in the range of 80 to 120mg KOH/g.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has a melting point of 70-120 ℃.
Preferably, the high acid number semi-crystalline carboxyl polyester resin has a melting point of 80-100 ℃.
Preferably, the weight ratio of the random carboxyl polyester resin to the high acid number semi-crystalline carboxyl polyester resin is from 1 to 9: 1.
preferably, the weight ratio of the random carboxyl polyester resin to the high acid number semi-crystalline carboxyl polyester resin is from 1 to 1.5: 1.
preferably, the weight ratio of the random carboxyl polyester resin to the high acid number semi-crystalline carboxyl polyester resin is 1: 1.
preferably, the high acid number semi-crystalline carboxyl polyester resin is used in an amount of 25 to 55% by weight based on the total weight of the powder coating.
Preferably, the high acid number semi-crystalline carboxyl polyester resin is used in an amount of 30 to 45% by weight based on the total weight of the powder coating.
Preferably, the random carboxyl polyester resin is one random carboxyl polyester resin or a mixture of more than one random carboxyl polyester resin.
The high acid number semi-crystalline carboxyl polyester resins and random carboxyl polyester resins described above are commercially available, for example: matflex AHA90 (high acid number semi-crystalline carboxyl polyester resin) from Anhui Huaan, SJ4700 (atactic carboxyl polyester resin) from Anhui Shenjian, and the like.
Preferably, the glycidyl isocyanurate curing agent has the following structural formula:
wherein R is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
The above alkyl group having 1 to 5 carbon atoms such as: methyl, ethyl, n-propyl, n-butyl, isobutyl, tert-butyl, pentyl and the like.
Preferably, R is a hydrogen atom or a methyl group.
Preferably, the curing agent of the isocyanuric acid glycidyl ester is at least one of triglycidyl isocyanurate and tri β -methyl isocyanuric acid glycidyl ester.
The triglycidyl isocyanurate mentioned above is commercially available, for example: araldite PT810 by Huntsman, TEPIC G by Nissan, AHA6810 by Anhui Huaan, and the like.
The above-mentioned tris β -methyl glycidyl isocyanurate is commercially available, for example, from Nissan, MT239, etc.
Preferably, the ratio of the total weight of the high acid number semi-crystalline carboxyl polyester resin and the random carboxyl polyester resin to the weight of the glycidyl isocyanurate curing agent is from 88.5 to 96: 4-11.5.
Preferably, the ratio of the total weight of the high acid number semi-crystalline carboxyl polyester resin and the random carboxyl polyester resin to the weight of the glycidyl isocyanurate curing agent is 89-92: 8-11.
Preferably, the matt low temperature cure outdoor weatherable powder coating is prepared according to a one-step extrusion process.
The above additives include at least one of a leveling agent, a plasticizer, a stabilizer (e.g., a stabilizer to prevent UV degradation), a getter (e.g., benzoin), and the like.
Such as titanium dioxide, red iron oxide, yellow iron oxide, chromium pigments, carbon black, phthalocyanine blue, azo, anthraquinone, thioindigo, benzanthrone, triphenyldioxane, quinacridone, etc.
The above one-step extrusion method is generally: mixing the raw materials uniformly, and then performing hot melting and mixing, tabletting, crushing and sieving by an extruder to obtain the product, wherein the mesh number of a sieve is 80-200 meshes (Chinese standard sieve); preferably 100-180 mesh, more preferably 140-180 mesh.
The powder coating can be applied by adhering it to a substrate (e.g., a metal substrate) by powder electrostatic gun, friction gun spray, fluidized bed dip coating, hot melt sintering, etc., and then curing by heating or radiation to form a coating film. The coating thickness is selected as desired and can be 50 to 400 microns, preferably 60 to 80 microns.
The invention selects the proper high-acid-value semi-crystalline carboxyl polyester resin and the proper random carboxyl polyester resin to be matched with each other, and selects the proper curing agent, so that the invention can be prepared by a one-step extrusion method, the preparation method is simple, and the invention can realize low-temperature curing extinction at 140 ℃ under the condition of ensuring the leveling property and the due mechanical property of the coating, has stable extinction effect, and has good outdoor weather resistance and storage stability.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Test method
1. Thickness of coating film
Measured directly with a magnetic thickness meter (thickness meter Q Nix4500 from Automation dr. Nix GmbH, germany).
2. Gloss of
The reflectance was measured directly at 60 ℃ according to GB/T1743-89 using Micro-gloss60 ℃ 4442 from BYK, Germany.
3. Impact strength
The method is carried out according to the GB/T1732-88 standard by using a hammer impact tester. Wherein 1Kg50cm positive recoil pass is designated 50+Positive going through is indicated at 50 and so on.
4. Levelling
PCI classifications were made by visual inspection, with 10 being the best and 0 being the worst.
The suppliers of the various raw materials in examples 1-3 are shown in table 1:
table 1 suppliers of each raw material in examples 1-3
Example 1
An extinction low-temperature curing outdoor weather-resistant powder coating comprises the following raw materials in parts by weight: 180 parts of random carboxyl polyester resin SJ4700, 180 parts of high-acid-value semi-crystalline carboxyl polyester resin Matflex AHA90, 43 parts of isocyanuric acid glycidyl ester curing agent AHA6810, 5 parts of flatting agent AHA1088P, 1 part of benzoin AHA4100, 20 parts of barium sulfate and 80 parts of titanium dioxide.
Mixing the above materials in a plastic bag for 3-5min, adding into a twin-screw extruder (model: SLJ-30A, Nicotiana tabacum), melting, homogenizing, tabletting, cooling, grinding into fine powder, sieving with 180 mesh sieve, respectively spraying on a degreased cold-rolled steel plate, and solidifying at 140 deg.C for 30 min.
The test was then carried out according to the test methods described above, with the specific results shown in Table 2.
Example 2
The same procedure as in example 1 was repeated except that the amount of the glycidyl isocyanurate curing agent AHA6810 was 40 parts.
Example 3
The same procedure as in example 1 was repeated except that the amount of the glycidyl isocyanurate curing agent AHA6810 was 38 parts.
And (3) performance detection:
table 2 examples 1-3 test results
The results in the table show that the light-resistant coating is prepared by a one-step extrusion method, the operation process is simple, the light-resistant coating can be cured and delustred at a low temperature of 140 ℃ under the condition of ensuring the mechanical property of the coating, and the examples 1 to 3 are all at a low light level, so that the light-resistant coating has a good delustring effect and a stable delustring effect.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The extinction low-temperature curing outdoor weather-resistant powder coating is characterized by comprising the following raw materials: the polyester resin comprises high-acid-value semi-crystalline carboxyl polyester resin, random carboxyl polyester resin, a glycidyl isocyanurate curing agent, an additive and/or a pigment filler, wherein the random carboxyl polyester resin is low-temperature curing type random carboxyl polyester resin.
2. The matted, low temperature curable outdoor weatherable powder coating of claim 1, wherein the random carboxyl polyester resin is prepared by condensation of dibasic acid and polyhydric alcohol; preferably, the dibasic acids include: terephthalic acid, isophthalic acid, 1, 4-cyclohexyldicarboxylic acid, adipic acid, maleic acid or succinic acid; preferably, the polyol comprises: ethylene glycol, diethylene glycol, propylene glycol, hexanediol, neopentyl glycol, cyclohexyldimethanol or trimethylolpropane.
3. A matted, low temperature curable outdoor weatherable powder coating according to claim 1 or 2, wherein said high acid number semi-crystalline carboxyl polyester resin is prepared by condensing a polybasic acid and a polyhydric alcohol; preferably, the polyacid comprises: terephthalic acid, isophthalic acid, 1, 4-cyclohexanedicarboxylic acid, 1, 4-succinic acid, adipic acid, citric acid, trimellitic anhydride, maleic acid or succinic acid; preferably, the polyol comprises: ethylene glycol, diethylene glycol, 1, 4-butanediol, hexanediol, cyclohexyldimethanol or trimethylolpropane.
4. A matted low temperature curable outdoor weatherable powder coating according to any one of claims 1 to 3, wherein the random carboxyl polyester resin has a weight average molecular weight of 1000-40000; preferably, the random carboxyl polyester resin has a weight average molecular weight of 1500-10000; preferably, the weight average molecular weight of the random carboxyl polyester resin is 3000-6000; preferably, the acid value of the random carboxyl polyester resin is in the range of 10 to 100mg KOH/g; preferably, the acid value of the random carboxyl polyester resin is in the range of 20 to 80mg KOH/g; preferably, the acid value of the random carboxyl polyester resin is in the range of 25 to 40mg KOH/g; preferably, the glass transition temperature Tg of the random carboxyl polyester resin is 40-80 ℃; preferably, the glass transition temperature Tg of the random carboxyl polyester resin is 45-65 ℃; preferably, the glass transition temperature Tg of the random carboxyl polyester resin is from 50 to 65 ℃.
5. A matted low temperature curable outdoor weatherable powder coating according to any one of claims 1 to 4, wherein the high acid number semi-crystalline carboxyl polyester resin has a weight average molecular weight of 1000-; preferably, the high acid number semi-crystalline carboxyl polyester resin has a weight average molecular weight of 1500-8000; preferably, the high acid number semi-crystalline carboxyl polyester resin has a weight average molecular weight of 2000-5000; preferably, the high acid number semi-crystalline carboxyl polyester resin has an acid number in the range of from 70 to 150mg KOH/g; preferably, the high acid number semi-crystalline carboxyl polyester resin has an acid number in the range of 80 to 120mg KOH/g; preferably, the high acid number semi-crystalline carboxyl polyester resin has a melting point of 70-120 ℃; preferably, the high acid number semi-crystalline carboxyl polyester resin has a melting point of 80-100 ℃.
6. A matted, low temperature curable outdoor weatherable powder coating according to any one of claims 1-5, wherein the weight ratio of random carboxyl polyester resin to high acid number semi-crystalline carboxyl polyester resin is from 1 to 9: 1; preferably, the weight ratio of the random carboxyl polyester resin to the high acid number semi-crystalline carboxyl polyester resin is from 1 to 1.5: 1; preferably, the weight ratio of the random carboxyl polyester resin to the high acid number semi-crystalline carboxyl polyester resin is 1: 1.
7. a matted, low temperature curable outdoor weatherable powder coating according to any one of claims 1 to 6, wherein said high acid number semi-crystalline carboxyl polyester resin is present in an amount of from 25 to 55% by weight based on the total weight of the powder coating; preferably, the high acid number semi-crystalline carboxyl polyester resin is used in an amount of 30 to 45% by weight based on the total weight of the powder coating.
8. A matted, low temperature curable outdoor weatherable powder coating according to any one of claims 1-7, wherein the random carboxyl polyester resin is one random carboxyl polyester resin or a mixture of more than one random carboxyl polyester resin.
9. A matted, low temperature curable outdoor weatherable powder coating according to any one of claims 1-8, wherein the glycidyl isocyanurate curing agent has the formula:
wherein R is hydrogen atom or alkyl containing 1-5 carbon atoms, preferably R is hydrogen atom or methyl, and preferably, the curing agent of the isocyanuric acid glycidyl ester is at least one of triglycidyl isocyanurate and tri β -methyl isocyanuric acid glycidyl ester.
10. A matted, low temperature curable outdoor weatherable powder coating according to any one of claims 1-9, wherein the ratio of the combined weight of high acid number semi-crystalline carboxyl polyester resin and random carboxyl polyester resin to the weight of the glycidyl isocyanurate curing agent is from 88.5 to 96: 4-11.5; preferably, the ratio of the total weight of the high acid number semi-crystalline carboxyl polyester resin and the random carboxyl polyester resin to the weight of the glycidyl isocyanurate curing agent is 89-92: 8-11; preferably, the matt low temperature cure outdoor weatherable powder coating is prepared according to a one-step extrusion process.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892859A (en) * | 2020-07-22 | 2020-11-06 | 赣州市博品家具有限公司 | Anti-yellowing medium-density fiberboard low-temperature curing powder coating |
| CN112341912A (en) * | 2020-10-20 | 2021-02-09 | 擎天材料科技有限公司 | Powder coating and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131308A (en) * | 2012-12-28 | 2013-06-05 | 广州擎天材料科技有限公司 | High-low acid value bi-component end carboxyl polyester resin composition for super-weather-proof dry-blending extinction powder coatings and application of the same |
| KR20170088489A (en) * | 2016-01-22 | 2017-08-02 | 주식회사 케이씨씨 | Powder coating composition of epoxy-polyester type |
| CN110423498A (en) * | 2019-09-05 | 2019-11-08 | 安徽省华安进出口有限公司 | A kind of HAA system powdery paints delustering agent and its application |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131308A (en) * | 2012-12-28 | 2013-06-05 | 广州擎天材料科技有限公司 | High-low acid value bi-component end carboxyl polyester resin composition for super-weather-proof dry-blending extinction powder coatings and application of the same |
| KR20170088489A (en) * | 2016-01-22 | 2017-08-02 | 주식회사 케이씨씨 | Powder coating composition of epoxy-polyester type |
| CN110423498A (en) * | 2019-09-05 | 2019-11-08 | 安徽省华安进出口有限公司 | A kind of HAA system powdery paints delustering agent and its application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111892859A (en) * | 2020-07-22 | 2020-11-06 | 赣州市博品家具有限公司 | Anti-yellowing medium-density fiberboard low-temperature curing powder coating |
| CN112341912A (en) * | 2020-10-20 | 2021-02-09 | 擎天材料科技有限公司 | Powder coating and preparation method and application thereof |
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