CN105062329A - Water-resistance polyester powder coating - Google Patents
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- CN105062329A CN105062329A CN201510437700.1A CN201510437700A CN105062329A CN 105062329 A CN105062329 A CN 105062329A CN 201510437700 A CN201510437700 A CN 201510437700A CN 105062329 A CN105062329 A CN 105062329A
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Abstract
The invention discloses water-resistance polyester powder coating. The powder coating is prepared from the following raw materials in parts by weight: 50-65 parts of pure polyester resin, 5-10 parts of fluorine-containing polyester resin, 3-10 parts of epoxy resin, 5-15 parts of organic silicon resin, 3-10 parts of carboxyl-terminated nitrile rubber, 1-5 parts of N,N,N',N'-tetrakis(2-hydroxyethyl)adipamide, 3-12 parts of tetrahydro-1,3,4,6-tetrakis(methoxymethyl)imidazo[4,5-d]imidazole-2,5(1H,3H)-dione, 1-5 parts of 2-phenyl-2-imidazoline, 1-5 parts of 2-methylimidazole, 2-5 parts of polyethylene, 3-10 parts of polyvinyl butyral, 10-25 parts of pigment and 2-10 parts of auxiliaries. The water-resistance polyester powder coating has good water resistance and good oil resistance, excellent acid and alkali corrosion resistance, can be used for outdoor coating, and has the advantages of good comprehensive performance and long service life.
Description
Technical field
The present invention relates to technical field of coatings, particularly relate to a kind of water resistant polyester type powder coating.
Background technology
Powder coating is that one does not contain solvent, and forms the new coating of film after carrying out construction application with powder morphology.Compared with traditional solvent based coating, the discharge of powder coating organic solvent volatile matter (VOC) when solidifying is almost nil, avoids the pollution to environment; Meanwhile, it is high that powder coating has utilization ratio, and coating property is good and be convenient to realize the advantages such as automation paint, obtains in recent years and develops faster.
Powder coating can be divided into thermoplastic powder coating and thermosetting powder coating(s) by the character according to powder coating filmogen, wherein polyester powder coating is the thermosetting powder coating(s) of a kind of excellent performance that development in recent years is got up, the advantages such as it has weathering resistance and excellent heat resistance, raw material sources is abundant, coating performance is good, low price, being widely used in the aspects such as hard shoulder, freeway guardrail, outdoor transformer, automobile, traffic sign, is a kind of important weather-resistance powder coatings for open air.But when it is for outdoor environment, often be subject to the impact of the climatic factor such as rainwater, humidity, cause the mechanical properties decrease of film, occur crackle and embrittlement, water easily diffuses into the ester group hydrolyses making vibrin in the film of polyester powder coating simultaneously, thus shortens the work-ing life of film.
Summary of the invention
Based on background technology exist technical problem, the present invention proposes a kind of water resistant polyester type powder coating, its water tolerance and oil-proofness good, acid-alkali-corrosive-resisting excellent performance, is used as outdoor application, good combination property, long service life.
A kind of water resistant polyester type powder coating that the present invention proposes, its raw material comprises following component by weight: pure polyester resin 50-65 part, fluorine-containing vibrin 5-10 part, epoxy resin 3-10 part, silicone resin 5-15 part, nbr carboxyl terminal 3-10 part, N, N, N ', N '-four (2-hydroxyethyl) adipamide 1-5 part, four methoxy methyl glycoluril 3-12 parts, 2-benzylimidazoline 1-5 part, glyoxal ethyline 1-5 part, polyethylene 2-5 part, polyvinyl butyral acetal 3-10 part, color stuffing 10-25 part, auxiliary agent 2-10 part.
In a particular embodiment, a kind of water resistant polyester type powder coating that the present invention proposes, in its raw material, the weight part of pure polyester resin can be 50,52,53,56,58,59,59.4,61,62,62.3,63,63.4,64,64.5,65 parts; The weight part of fluorine-containing vibrin can be 5,6,7,7.5,8,8.6,9,9.3,10 parts; The weight part of epoxy resin can be 3,4,5,5.3,6,6.3,7,7.5,8,8.6,9,9.4,10 parts; The weight part of silicone resin can be 5,6,7,7.5,8,8.6,9,9.3,10,10.6,11,11.3,12,12.6,13,13.4,14,14.6,15 parts; The weight part of nbr carboxyl terminal can be 3,4,5,5.3,6,6.3,7,7.5,8,8.6,9,9.3,10 parts; N, N, N ', the weight part of N '-four (2-hydroxyethyl) adipamide can be 1,1.2,1.8,2,2.3,2.8,3,3.4,4,4.6,5 part; The weight part of four methoxy methyl glycoluril can be 3,4,5,5.3,6,6.3,7,7.8,8,8.6,9,9.3,10,10.6,11,11.3,12 parts; The weight part of 2-benzylimidazoline can be 1,1.2,1.8,2,2.3,2.8,3,3.4,3.8,4,4.6,5 part; The weight part of glyoxal ethyline can be 1,1.2,1.8,2,2.6,3,3.4,4,4.6,5 part; Poly weight part can be 2,2.3,2.8,3,3.4,4,4.6,5 parts; The weight part of polyvinyl butyral acetal can be 3,4,5,5.3,6,6.3,7,7.8,8,8.6,9,9.4,10 parts; The weight part of color stuffing can be 10,12,13,15,16,18,19,19.3,21,23,23.4,24,24.6,25 parts; The weight part of auxiliary agent can be 2,2.8,3,3.4,4,4.6,5,5.3,6,6.8,8,8.6,9,9.4,10 parts.
Preferably, in its raw material, the weight ratio of pure polyester resin, fluorine-containing vibrin, epoxy resin, silicone resin, nbr carboxyl terminal is 55-63:7-10:5-9:7-13:5-9.
Preferably, in its raw material, N, N, N ', the weight ratio of N '-four (2-hydroxyethyl) adipamide, four methoxy methyl glycoluril is 2-4.5:6-11.
Preferably, its raw material comprises following component by weight: pure polyester resin 58-62 part, fluorine-containing vibrin 8-9 part, epoxy resin 8-9 part, silicone resin 8-9 part, nbr carboxyl terminal 7-9 part, N, N, N ', N '-four (2-hydroxyethyl) adipamide 3-4 part, four methoxy methyl glycoluril 8-11 parts, 2-benzylimidazoline 2-4.5 part, glyoxal ethyline 3-4 part, polyethylene 3-3.5 part, polyvinyl butyral acetal 5-7 part, color stuffing 18-21 part, auxiliary agent 4-8 part.
Preferably, its raw material comprises following component by weight: pure polyester resin 60 parts, 8.3 parts, fluorine-containing vibrin, epoxy resin 8.7 parts, silicone resin 8.5 parts, nbr carboxyl terminal 8 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 3.6 parts, four methoxy methyl glycoluril 10 parts, 2-benzylimidazoline 4.2 parts, glyoxal ethyline 3.6 parts, polyethylene 3.2 parts, polyvinyl butyral acetal 5.6 parts, color stuffing 20 parts, auxiliary agent 7 parts.
Preferably, described pure polyester resin is terminal carboxyl polyester resin and hydroxyl telechelic polyester resin is the combination of 2-5:1 by weight.
Preferably, the acid number of described terminal carboxyl polyester resin is 350-580mgKOH/g, and molecular weight is 2800-3500, and second-order transition temperature is 55-65 DEG C; The molecular weight of described hydroxyl telechelic polyester resin is 3000-5000, and second-order transition temperature is 58-63 DEG C.
Preferably, described epoxy resin is one or more the combination in hydrogenated bisphenol A epoxy resin, tetraphenolethane epoxy resin, bisphenol-s epoxy resin; Hydrogenated bisphenol A epoxy resin has excellent erosion resistance and weathering resistance; Tetraphenolethane epoxy resin contains four epoxide groups, and after solidification, the cross-linking density of film is large, improves erosion resistance and the temperature-change resistance of film; Bisphenol-s epoxy resin can improve the thermotolerance of film, improve the weathering resistance of film, hydrogenated bisphenol A epoxy resin, tetraphenolethane epoxy resin, bisphenol-s epoxy resin respectively or coordinate join in coating, the water tolerance of coating, thermotolerance and weathering resistance can be improved.
Preferably, described color stuffing is one or more the combination in nano silicon, nano titanium oxide, aluminum oxide, zinc borate, red iron oxide, iron mica, talcum powder, kaolin, nanometer silver; Multiple filler cooperatively interacts, and joins in system, is uniformly dispersed in system, by introducing the elements such as silicon, boron, titanium in system, improves the thermotolerance of coating.
Preferably, described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by epoxy chloropropane and sodium hydroxide, then 2 are added, 3,5,6-tetrafluorobenzyl alcohol and dimethyl phonyl silanol, be warming up to 55-60 DEG C, reaction 4-6h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By 2-butyl-2-ethyl-1, ammediol, Tetra hydro Phthalic anhydride, tetraethylammonium bromide, epoxy chloropropane and glycidyl ether add in dimethyl formamide and mix, then under the protection of nitrogen, 110-125 DEG C is warming up to, reaction 2-3h, acetone diluted is added after reaction terminates, then add the mixed solvent of second alcohol and water, leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin; In the preparation process of fluorine-containing vibrin, in system, introduce 2,3,5,6-tetrafluorobenzyl alcohol and dimethyl phonyl silanol, improve water tolerance and the thermotolerance of film, simultaneously owing to introducing rigid structure phenyl ring in system, improve the mechanical property of coating; In addition, have selected the raw material of 2-butyl-2-ethyl-1,3-PD as reaction, it has longer aliphatic chain, joins in system, and hydrophobicity is good, improves water tolerance and the weathering resistance of coating.
Preferably, described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 25-35 part epoxy chloropropane and 2-3 part sodium hydroxide by weight, then 3-10 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 5-15 part dimethyl phonyl silanol, be warming up to 55-60 DEG C, reaction 4-6h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates, by weight by 2-5 part 2-butyl-2-ethyl-1, ammediol, 10-15 part Tetra hydro Phthalic anhydride, 1-2 part tetraethylammonium bromide, 25-40 part epoxy chloropropane and 30-50 part glycidyl ether add in 5-10 part dimethyl formamide and mix, then under the protection of nitrogen, 110-125 DEG C is warming up to, reaction 2-3h, 30-50 part acetone is added after reaction terminates, then the mixed solvent of the second alcohol and water of 50-100 part is added, in the mixed solvent of wherein second alcohol and water, the ratio of the volume of second alcohol and water is 1:3-5, leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
Preferably, described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 30 parts of epoxy chloropropane and 2.6 parts of sodium hydroxide by weight, then 7 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 12 parts of dimethyl phonyl silanols, be warming up to 58 DEG C, reaction 5h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By weight by 3 parts of 2-butyl-2-ethyls-1; ammediol, 12 parts of Tetra hydro Phthalic anhydrides, 1.6 parts of tetraethylammonium bromides, 35 parts of epoxy chloropropane and 40 parts of glycidyl ethers add in 8 parts of dimethyl formamides and mix; then under the protection of nitrogen, 120 DEG C are warming up to; reaction 2.5h; 40 parts of acetone are added after reaction terminates; then the mixed solvent of the second alcohol and water of 80 parts is added; in the mixed solvent of wherein second alcohol and water; the ratio of the volume of second alcohol and water is 1:4; leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
Water resistant polyester toner coating of the present invention can powder coating preparation technology conveniently, obtains after extruding through twin-screw mixer after each raw material mixing, pulverize, sieving by proportioning.
In the present invention, with the filmogen that pure polyester resin is main, and with the addition of fluorine-containing vibrin, epoxy resin, silicone resin, nbr carboxyl terminal coordinates with pure polyester resin, improve the water tolerance of powder coating, thermotolerance and the sticking power with base material, wherein, the fluorine-containing vibrin added is by fluorine introducing system, the atomic radius of fluorine is little, the polarizability of C-F key is little, intramolecule compact structure, show low surface tension, the surface energy of adding fluorine-containing vibrin is low, can at surface enrichment, make coating hydrophobic oleophobic, improve the water tolerance of film, resistance to soiling and resistance to acids and bases, epoxy resin joins in system, improves the erosion resistance of film on the one hand, prevents the defect adding the sticking power reduction caused because of fluorine on the other hand, silicone resin and nbr carboxyl terminal coordinate, and improve thermotolerance and the oil-proofness of coating, further improve the weathering resistance of coating, N, N, N ', N '-four (2-hydroxyethyl) adipamide, four methoxy methyl glycoluril coordinate as solidifying agent, and with the addition of 2-benzylimidazoline and glyoxal ethyline, while not reducing coating heat resistance, reduce solidification value, shorten set time, the cooperation of polyethylene, polyvinyl butyral acetal joins in coating, improves the toughness of coating.
Embodiment
Below, by specific embodiment, technical scheme of the present invention is described in detail.
Embodiment 1
A kind of water resistant polyester type powder coating that the present invention proposes, its raw material comprises following component by weight: pure polyester resin 65 parts, 5 parts, fluorine-containing vibrin, epoxy resin 10 parts, silicone resin 5 parts, nbr carboxyl terminal 10 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 1 part, four methoxy methyl glycoluril 12 parts, 2-benzylimidazoline 1 part, glyoxal ethyline 5 parts, polyethylene 2 parts, polyvinyl butyral acetal 10 parts, color stuffing 10 parts, auxiliary agent 10 parts.
Embodiment 2
A kind of water resistant polyester type powder coating that the present invention proposes, its raw material comprises following component by weight: pure polyester resin 50 parts, 10 parts, fluorine-containing vibrin, hydrogenated bisphenol A epoxy resin 3 parts, silicone resin 15 parts, nbr carboxyl terminal 3 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 5 parts, four methoxy methyl glycoluril 3 parts, 2-benzylimidazoline 5 parts, glyoxal ethyline 1 part, polyethylene 5 parts, polyvinyl butyral acetal 3 parts, iron mica 5 parts, talcum powder 7 parts, kaolin 3 parts, nanometer silver 10 parts, auxiliary agent 2 parts;
Wherein, described pure polyester resin is terminal carboxyl polyester resin and hydroxyl telechelic polyester resin is the combination of 2:1 by weight; The acid number of described terminal carboxyl polyester resin is 580mgKOH/g, and molecular weight is 2800, and second-order transition temperature is 65 DEG C; The molecular weight of described hydroxyl telechelic polyester resin is 3000, and second-order transition temperature is 63 DEG C;
Described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 25 parts of epoxy chloropropane and 3 parts of sodium hydroxide by weight, then 3 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 15 parts of dimethyl phonyl silanols, be warming up to 55 DEG C, reaction 6h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By weight by 2 parts of 2-butyl-2-ethyls-1; ammediol, 15 parts of Tetra hydro Phthalic anhydrides, 1 part of tetraethylammonium bromide, 40 parts of epoxy chloropropane and 30 parts of glycidyl ethers add in 10 parts of dimethyl formamides and mix; then under the protection of nitrogen, 110 DEG C are warming up to; reaction 3h; 30 parts of acetone are added after reaction terminates; then the mixed solvent of the second alcohol and water of 100 parts is added; in the mixed solvent of wherein second alcohol and water; the ratio of the volume of second alcohol and water is 1:3; leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
Embodiment 3
A kind of water resistant polyester type powder coating that the present invention proposes, its raw material comprises following component by weight: pure polyester resin 60 parts, 8.3 parts, fluorine-containing vibrin, tetraphenolethane epoxy resin 4 parts, bisphenol-s epoxy resin 4.7 parts, silicone resin 8.5 parts, nbr carboxyl terminal 8 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 3.6 parts, four methoxy methyl glycoluril 10 parts, 2-benzylimidazoline 4.2 parts, glyoxal ethyline 3.6 parts, polyethylene 3.2 parts, polyvinyl butyral acetal 5.6 parts, color stuffing 20 parts, auxiliary agent 7 parts;
Wherein, described pure polyester resin is terminal carboxyl polyester resin and hydroxyl telechelic polyester resin is the combination of 5:1 by weight; The acid number of described terminal carboxyl polyester resin is 550mgKOH/g, and molecular weight is 3200, and second-order transition temperature is 62 DEG C; The molecular weight of described hydroxyl telechelic polyester resin is 3800, and second-order transition temperature is 59 DEG C; Described color stuffing is that nano silicon, nano titanium oxide, aluminum oxide, zinc borate, red iron oxide, iron mica, talcum powder, kaolin, nanometer silver are by the combination of the ratio of any weight;
Described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 30 parts of epoxy chloropropane and 2.6 parts of sodium hydroxide by weight, then 7 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 12 parts of dimethyl phonyl silanols, be warming up to 58 DEG C, reaction 5h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By weight by 3 parts of 2-butyl-2-ethyls-1; ammediol, 12 parts of Tetra hydro Phthalic anhydrides, 1.6 parts of tetraethylammonium bromides, 35 parts of epoxy chloropropane and 40 parts of glycidyl ethers add in 8 parts of dimethyl formamides and mix; then under the protection of nitrogen, 120 DEG C are warming up to; reaction 2.5h; 40 parts of acetone are added after reaction terminates; then the mixed solvent of the second alcohol and water of 80 parts is added; in the mixed solvent of wherein second alcohol and water; the ratio of the volume of second alcohol and water is 1:4; leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
Embodiment 4
A kind of water resistant polyester type powder coating that the present invention proposes, its raw material comprises following component by weight: pure polyester resin 58 parts, 9 parts, fluorine-containing vibrin, hydrogenated bisphenol A epoxy resin 2 parts, tetraphenolethane epoxy resin 5 parts, bisphenol-s epoxy resin 1 part, silicone resin 9 parts, nbr carboxyl terminal 7 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 4 parts, four methoxy methyl glycoluril 8 parts, 2-benzylimidazoline 4.5 parts, glyoxal ethyline 3 parts, polyethylene 3.5 parts, polyvinyl butyral acetal 5 parts, 21 parts, aluminum oxide, auxiliary agent 4 parts;
Wherein, described pure polyester resin is terminal carboxyl polyester resin and hydroxyl telechelic polyester resin is the combination of 3:1 by weight; The acid number of described terminal carboxyl polyester resin is 400mgKOH/g, and molecular weight is 3000, and second-order transition temperature is 60 DEG C; The molecular weight of described hydroxyl telechelic polyester resin is 4000, and second-order transition temperature is 60 DEG C;
Described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 33 parts of epoxy chloropropane and 2.7 parts of sodium hydroxide by weight, then 7 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 11 parts of dimethyl phonyl silanols, be warming up to 59 DEG C, reaction 5.2h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By weight by 3.4 parts of 2-butyl-2-ethyls-1; ammediol, 12 parts of Tetra hydro Phthalic anhydrides, 1.8 parts of tetraethylammonium bromides, 33 parts of epoxy chloropropane and 42 parts of glycidyl ethers add in 9 parts of dimethyl formamides and mix; then under the protection of nitrogen, 116 DEG C are warming up to; reaction 2.4h; 45 parts of acetone are added after reaction terminates; then the mixed solvent of the second alcohol and water of 75 parts is added; in the mixed solvent of wherein second alcohol and water; the ratio of the volume of second alcohol and water is 1:4; leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
Embodiment 5
A kind of water resistant polyester type powder coating that the present invention proposes, its raw material comprises following component by weight: pure polyester resin 62 parts, 8 parts, fluorine-containing vibrin, tetraphenolethane epoxy resin 9 parts, silicone resin 8 parts, nbr carboxyl terminal 9 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 3 parts, four methoxy methyl glycoluril 11 parts, 2-benzylimidazoline 2 parts, glyoxal ethyline 4 parts, polyethylene 3 parts, polyvinyl butyral acetal 7 parts, nano silicon 9 parts, nano titanium oxide 9 parts, auxiliary agent 8 parts;
Wherein, described pure polyester resin is terminal carboxyl polyester resin and hydroxyl telechelic polyester resin is the combination of 4:1 by weight; The acid number of described terminal carboxyl polyester resin is 350mgKOH/g, and molecular weight is 3500, and second-order transition temperature is 55 DEG C; The molecular weight of described hydroxyl telechelic polyester resin is 5000, and second-order transition temperature is 58 DEG C.
Described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 35 parts of epoxy chloropropane and 2 parts of sodium hydroxide by weight, then 10 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 5 parts of dimethyl phonyl silanols, be warming up to 60 DEG C, reaction 4h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By weight by 5 parts of 2-butyl-2-ethyls-1; ammediol, 10 parts of Tetra hydro Phthalic anhydrides, 2 parts of tetraethylammonium bromides, 25 parts of epoxy chloropropane and 50 parts of glycidyl ethers add in 5 parts of dimethyl formamides and mix; then under the protection of nitrogen, 125 DEG C are warming up to; reaction 2h; 50 parts of acetone are added after reaction terminates; then the mixed solvent of the second alcohol and water of 50 parts is added; in the mixed solvent of wherein second alcohol and water; the ratio of the volume of second alcohol and water is 1:5; leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
Its outward appearance of water resistant polyester type powder coating described in embodiment 1-5 is loose without caking, uniform color, and density is 1.4-1.6g/cm
3; Horizontal melt fluidity is 25-30mm; Fineness of powder 180 screen residue < 0.5%; Room temperature 3 years stable storings, 15-20min solidification at 175-185 DEG C.
Carry out Performance Detection by after water resistant polyester type powder coating solidification described in embodiment 1-5 to film, result is as shown in the table:
| Test item | Performance perameter |
| Outward appearance | Smoothly |
| Gloss (60 ° of gauge outfits) | 5-85％ |
| Shock-resistance (weighted-drop) | By 50kg.cm (4.9Nm) |
| Drawing test | ＞6mm |
| Penetration hardness | By 4kg (39N) |
| Pliability test (tap web axle) | Pass through 2mm |
| Cross Hatch sticking power | 100% attachment |
| Surface hardness | 2-3H |
| Salt-fog test | Pass through 1000h |
| Wet fastness | Pass through 1000h |
| Water immersion test | Pass through 240h |
| Uvioresistant is tested | Splendid |
| The washing composition of resistance to boiling is tested | 24h is unchanged |
| Be exposed to the sun test in outdoor | 12 months good, without powder phenomenon-tion |
| Acid resistance (5%HCl) | Pass through 300h |
| Alkali resistance (5%NaOH) | Pass through 300h |
| Petrol-resistance (120 #Gasoline) | Pass through 300h |
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a water resistant polyester type powder coating, it is characterized in that, its raw material comprises following component by weight: pure polyester resin 50-65 part, fluorine-containing vibrin 5-10 part, epoxy resin 3-10 part, silicone resin 5-15 part, nbr carboxyl terminal 3-10 part, N, N, N ', N '-four (2-hydroxyethyl) adipamide 1-5 part, four methoxy methyl glycoluril 3-12 parts, 2-benzylimidazoline 1-5 part, glyoxal ethyline 1-5 part, polyethylene 2-5 part, polyvinyl butyral acetal 3-10 part, color stuffing 10-25 part, auxiliary agent 2-10 part.
2. water resistant polyester type powder coating according to claim 1, it is characterized in that, in its raw material, the weight ratio of pure polyester resin, fluorine-containing vibrin, epoxy resin, silicone resin, nbr carboxyl terminal is 55-63:7-10:5-9:7-13:5-9.
3. water resistant polyester type powder coating according to claim 1 or 2, is characterized in that, in its raw material, and N, N, N ', the weight ratio of N '-four (2-hydroxyethyl) adipamide, four methoxy methyl glycoluril is 2-4.5:6-11.
4. water resistant polyester type powder coating according to any one of claim 1-3, it is characterized in that, its raw material comprises following component by weight: pure polyester resin 58-62 part, fluorine-containing vibrin 8-9 part, epoxy resin 8-9 part, silicone resin 8-9 part, nbr carboxyl terminal 7-9 part, N, N, N ', N '-four (2-hydroxyethyl) adipamide 3-4 part, four methoxy methyl glycoluril 8-11 parts, 2-benzylimidazoline 2-4.5 part, glyoxal ethyline 3-4 part, polyethylene 3-3.5 part, polyvinyl butyral acetal 5-7 part, color stuffing 18-21 part, auxiliary agent 4-8 part,
Preferably, its raw material comprises following component by weight: pure polyester resin 60 parts, 8.3 parts, fluorine-containing vibrin, epoxy resin 8.7 parts, silicone resin 8.5 parts, nbr carboxyl terminal 8 parts, N, N, N ', N '-four (2-hydroxyethyl) adipamide 3.6 parts, four methoxy methyl glycoluril 10 parts, 2-benzylimidazoline 4.2 parts, glyoxal ethyline 3.6 parts, polyethylene 3.2 parts, polyvinyl butyral acetal 5.6 parts, color stuffing 20 parts, auxiliary agent 7 parts.
5. water resistant polyester type powder coating according to any one of claim 1-4, is characterized in that, described pure polyester resin is terminal carboxyl polyester resin and hydroxyl telechelic polyester resin is the combination of 2-5:1 by weight.
6. water resistant polyester type powder coating according to claim 5, it is characterized in that, the acid number of described terminal carboxyl polyester resin is 350-580mgKOH/g, and molecular weight is 2800-3500, and second-order transition temperature is 55-65 DEG C; The molecular weight of described hydroxyl telechelic polyester resin is 3000-5000, and second-order transition temperature is 58-63 DEG C.
7. water resistant polyester type powder coating according to any one of claim 1-6, is characterized in that, described epoxy resin is one or more the combination in hydrogenated bisphenol A epoxy resin, tetraphenolethane epoxy resin, bisphenol-s epoxy resin.
8. water resistant polyester type powder coating according to any one of claim 1-7, it is characterized in that, described color stuffing is one or more the combination in nano silicon, nano titanium oxide, aluminum oxide, zinc borate, red iron oxide, iron mica, talcum powder, kaolin, nanometer silver.
9. water resistant polyester type powder coating according to any one of claim 1-8, it is characterized in that, described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by epoxy chloropropane and sodium hydroxide, then 2 are added, 3,5,6-tetrafluorobenzyl alcohol and dimethyl phonyl silanol, be warming up to 55-60 DEG C, reaction 4-6h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By 2-butyl-2-ethyl-1; ammediol, Tetra hydro Phthalic anhydride, tetraethylammonium bromide, epoxy chloropropane and glycidyl ether add in dimethyl formamide and mix; then under the protection of nitrogen, 110-125 DEG C is warming up to; reaction 2-3h; acetone diluted is added after reaction terminates; then add the mixed solvent of second alcohol and water, leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
10. water resistant polyester type powder coating according to any one of claim 1-9, it is characterized in that, described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 25-35 part epoxy chloropropane and 2-3 part sodium hydroxide by weight, then 3-10 part 2,3,5 is added, 6-tetrafluorobenzyl alcohol and 5-15 part dimethyl phonyl silanol, be warming up to 55-60 DEG C, reaction 4-6h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates, by weight by 2-5 part 2-butyl-2-ethyl-1, ammediol, 10-15 part Tetra hydro Phthalic anhydride, 1-2 part tetraethylammonium bromide, 25-40 part epoxy chloropropane and 30-50 part glycidyl ether add in 5-10 part dimethyl formamide and mix, then under the protection of nitrogen, 110-125 DEG C is warming up to, reaction 2-3h, 30-50 part acetone is added after reaction terminates, then the mixed solvent of the second alcohol and water of 50-100 part is added, in the mixed solvent of wherein second alcohol and water, the ratio of the volume of second alcohol and water is 1:3-5, leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin,
Preferably, described fluorine-containing vibrin is prepared according to following technique: add in reaction unit by 30 parts of epoxy chloropropane and 2.6 parts of sodium hydroxide by weight, then 7 part 2 is added, 3,5,6-tetrafluorobenzyl alcohol and 12 parts of dimethyl phonyl silanols, be warming up to 58 DEG C, reaction 5h, obtains glycidyl ether through filtration, underpressure distillation after reaction terminates; By weight by 3 parts of 2-butyl-2-ethyls-1; ammediol, 12 parts of Tetra hydro Phthalic anhydrides, 1.6 parts of tetraethylammonium bromides, 35 parts of epoxy chloropropane and 40 parts of glycidyl ethers add in 8 parts of dimethyl formamides and mix; then under the protection of nitrogen, 120 DEG C are warming up to; reaction 2.5h; 40 parts of acetone are added after reaction terminates; then the mixed solvent of the second alcohol and water of 80 parts is added; in the mixed solvent of wherein second alcohol and water; the ratio of the volume of second alcohol and water is 1:4; leave standstill after stirring, after filtration, washing, drying obtains described fluorine-containing vibrin.
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| CN105803978A (en) * | 2016-05-12 | 2016-07-27 | 江苏固格澜栅防护设施有限公司 | Road guardrail |
| CN105860764A (en) * | 2016-06-08 | 2016-08-17 | 合肥市燕美粉末涂料有限公司 | Powder coating for automotive interior parts and preparing method thereof |
| CN106118401A (en) * | 2016-07-18 | 2016-11-16 | 天长市巨龙车船涂料有限公司 | A kind of water-resistant type PVB acid modified alcoholic finish paint |
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