CN100999642B - Thermo-sensitive epoxy resin powder paint - Google Patents
Thermo-sensitive epoxy resin powder paint Download PDFInfo
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- CN100999642B CN100999642B CN200610155701A CN200610155701A CN100999642B CN 100999642 B CN100999642 B CN 100999642B CN 200610155701 A CN200610155701 A CN 200610155701A CN 200610155701 A CN200610155701 A CN 200610155701A CN 100999642 B CN100999642 B CN 100999642B
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Abstract
The thermosensitive epoxy resin powder paint consists of low softening point epoxy resin 60-70 wt%, curing agent 3-6 wt%, photoinitiator 0.5-1.0 wt%, leveling agent 1-2 wt%, defoaming agent 0.5-1.0 wt%, and pigment and stuffing 20-35 wt%. The present invention has imidazole type low temperature curing agent resulting in low temperature fast curing and photoinitiator to further raise low temperature curing speed, so that the paint has high low temperature curing speed. The present invention has short production period, low power consumption, low production cost and high production efficiency.
Description
Technical field
The present invention relates to a kind of powder coating, particularly can be used for the epoxy powder coating that plastics or wood product surface are covered with paint, lacquer, colour wash, etc. about low-temperature curing.
Background technology
Powder coating is as a kind of solvent-free decoration and protective material, being widely used in household electrical appliance, automobile and lamp surface with advantages such as clean environment firendly, performance are remarkable and reduce cost decorates, in recent years along with the environmental protection characteristic of powder coating, and the expansion Application Areas, nonmetallic surface particularly plastics or wood product surface cover with paint, lacquer, colour wash, etc. and have a large capacity and a wide range, urgently promote the use of powder coating to reach environmental requirement.For realizing this goal, people at first use the cured powder paint of UV-irradiation, but UV curing powder coating in use, appear its many defectives gradually, at first be that pigment in the powder coating composition has part to be pigment dyestuff, cause is the direct irradiation of ultraviolet resistance not, and product colour is changed.The covering with paint technology that is powder coating again makes coating thick partially, and produce deep layer and solidify badly, be that the surface shape of coated article is complicated and changeable in addition, the dark side that existence can not directly shine by UV-light produces the problem of curing inequality thus.The kind development of above-mentioned many disadvantages restriction photocuring, particularly UV curing powder coating.
The condition of cure of general powder coating is that storing temperature is higher mostly, storing time is longer, this has brought sizable difficulty for the application such as heat labile coated articles such as plastics, timber, various density board, nine clamping plate, the expansion and the popularization of powder coating range of application have been restricted, storing time is oversize, the production cycle of product is long, and the paint line floor space must correspondingly increase, and labor productivity just can't improve.Therefore, from saving the energy, reduce cost, raise the efficiency, enlarge the range of application of low Contamination Coatings, the thermo-sensitivity powder coating of low-temperature curing will further tie up the market of liquid coating.
Summary of the invention
The objective of the invention is to develop a kind of low thermo-sensitivity powder coating of solidification value that can use plastics, timber.
The technical solution used in the present invention is: thermo-sensitive epoxy resin powder paint, comprise Resins, epoxy, solidifying agent, light trigger, flow agent, defoamer, pigment and filler, it is characterized in that the low softening point bisphenol A epoxide resin is 60～70% weight, the imidazole type solidifying agent is 3～6% weight, light trigger is 0.5～1.0% weight, flow agent is 1～2% weight, and defoamer is 0.5～1.0% weight, and pigment and filler are 20～35% weight.
Described low softening point Resins, epoxy is bisphenol A epoxide resin, and oxirane value is 0.10～0.22, and softening temperature is 76～85 ℃
Described solidifying agent is the imidazole type solidifying agent, colourless or yellow solid powder, and 60～100 ℃ of fusing points comprise the 2-benzylimidazoline, 2-ethyl imidazol(e), 2-propyl imidazole.
Described light trigger comprises the 2-isopropyl thioxanthone, and 2-methyl 1-(4-methylthio group phenyl)-2-morpholinyl-1-acetone is yellow or white solid powder, and molecular weight is 254 or 279.
Described flow agent is an esters of acrylic acid, and oyster white or light yellow solid particle, softening temperature are 80～105 ℃, solid content 〉=99%, oxirane value 0.05～0.12.
Described defoamer is conventional silicone emulsion, is non-polar compound, based on the silicone antifoam agent of methyl polysiloxane.
Color stuffing is conventional pigment and filler, and pigment comprises titanium dioxide, ferric oxide, or three primary colours mixture.Filler comprises lime carbonate, barium sulfate and zinc sulfide white mixture or at least a.
The present invention adopts low temperature curing agent, light trigger and the flow agent of imidazole type and Resins, epoxy that low softening temperature is low melting glass to interact, have the low-activation energy reactive group in the molecular structure of imidazole type low temperature curing agent, have low temperature fast setting characteristic energy.At lower temperature, under 100 ℃, have lower melt viscosity, before solidifying and in the solidification process, have good flowability to guarantee coating.From molecular structure, contain the lower molecular weight of more carbon-to-carbon double bond, increase the solidified cross-linking density, improve the mechanical property of filming.The adding of light trigger has improved low-temperature curing speed, shortens set time.The esters of acrylic acid flow agent can reduce the surface tension of coating in powder coating, make membranous homogenizing and levelling, improves the reactive behavior of Resins, epoxy and solidifying agent.Net effect is to reduce solidification value, improves curing speed, and solidification value is reduced to 120 ℃～130 ℃/16min from 180 ℃ original～200 ℃/20～30min.Reduce storing temperature, reduce storing time, shorten the production cycle, thereby save the energy, reduce production costs, enhance productivity.
Embodiment
Embodiment 1
Main ingredient is selected; Low softening point Resins, epoxy is selected bisphenol A type epoxy resin E-14, and softening point temperature is 78～85 ℃, and oxirane value is 0.10～0.18, and outward appearance is near the yellow transparent solid.
Solidifying agent 2-benzylimidazoline, white or faint yellow crystallization, molecular weight 146,96～100 ℃ of fusing points.
Light trigger (Photocure907) chemical name is 2-methyl isophthalic acid-(4-aminomethyl phenyl)-2 morpholinyls-1-acetone, molecular weight 279,72～75 ℃ of fusing points, white powder.
Flow agent is a vinylformic acid Racemic glycidol resin copolymer, oxirane value 0.05～0.12, pressed powder.
Pigment is titanium oxide powder.
Filler is lime carbonate and blaue fixe, titanium oxide: lime carbonate: barium sulfate=1: 1: 1.
Form proportioning: low softening point Resins, epoxy 60% weight, solidifying agent 3% weight, light trigger 1% weight, flow agent 1% weight, defoamer is 1% weight, color stuffing 34% weight.
Technological process is sketched: above-mentioned component is weighed to mix, be added in the screw extrusion press then and melt extrude, the machine cavity temperature is at 88～92 ℃, extruder temperature is 98～102 ℃, the truncation of extruded material cooling press is slit into sheet, deliver in the pulverizer and pulverize, through cyclonic separation, vibration screening makes granularity at 300 order left and right sides desired products.
Coating adopts electrostatic spraying or the construction of electrostatic fluidized bed technology to apply.Standard method test routinely records 120 ℃/16min of condition of cure.
Embodiment 2
Main ingredient is selected; Low softening point Resins, epoxy is selected bisphenol A type epoxy resin E-20, and softening point temperature is 65～76 ℃, oxirane value 0.18～0.22, yellow transparent solid.
Solidifying agent is the 2-ethyl imidazol(e), white light yellow crystallization, 61～66 ℃ of melting temperatures, molecular weight 96.
Light trigger (PhotocureITX-P) chemical name is the 2-isopropyl thioxanthone, molecular weight 254,70～76 ℃ of fusing points, micro-yellow powder.
Flow agent adopts vinylformic acid Racemic glycidol resin copolymer, oxirane value 0.05～0.12, pressed powder.
Pigment is red iron oxide, and filler is lime carbonate and blaue fixe.
Form proportioning: low softening point Resins, epoxy is 65% weight, and solidifying agent is 4% weight, and light trigger is 0.8% weight, and flow agent is 1.1% weight, and defoamer is 1.0% weight, and pigment is 0.1% weight, and filler is 28% weight.
Technological process is sketched: above-mentioned component is weighed to mix, be added in the screw extrusion press then and melt extrude, the machine cavity temperature is at 88～92 ℃, extruder temperature is 98～102 ℃, the truncation of extruded material cooling press is slit into sheet, deliver in the pulverizer and pulverize, through cyclonic separation, vibration screening makes granularity at 200 order left and right sides desired products.
Coating adopts electrostatic spraying or the construction of electrostatic fluidized bed technology to apply.Standard method test routinely records 125 ℃/16min of condition of cure.
Embodiment 3
Main ingredient is selected; Low softening point Resins, epoxy is selected bisphenol A type epoxy resin E-14, and softening point temperature is 78～85 ℃, oxirane value 0.10～0.18, and outward appearance is near the yellow transparent solid.
Solidifying agent, 2-propyl imidazole, white or light yellow crystallization, molecular weight 110,60～62 ℃ of fusing points.
Light trigger is the mixture of Photocure907 and PhotocureITX-P, and both weight ratios are 1: 1.
Flow agent adopts vinylformic acid Racemic glycidol resin copolymer, oxirane value 0.05～0.12, pressed powder.
Pigment needs according to the user and is coated with material and different, for example is mixed into the needs color according to timber depth different mining with red, yellow, blue three primary colours.
Form proportioning: low softening point Resins, epoxy is 70% weight, and solidifying agent is 5% weight, and light trigger is 1.0% weight, and flow agent is 0.5% weight, and defoamer is 0.5% weight, and pigment is 1.0% weight, and filler is 22% weight.
Technological process is sketched: above-mentioned component is weighed to mix, be added in the screw extrusion press then and melt extrude, the machine cavity temperature is at 88～92 ℃, extruder temperature is 98～102 ℃, the truncation of extruded material cooling press is slit into sheet, deliver in the pulverizer and pulverize, through cyclonic separation, vibration screening makes granularity at 300 order left and right sides desired products.
Coating adopts electrostatic spraying or the construction of electrostatic fluidized bed technology to apply.Standard method test routinely records 130 ℃/16min of condition of cure.
Claims (6)
1. thermo-sensitive epoxy resin powder paint, comprise Resins, epoxy, solidifying agent, light trigger, flow agent, defoamer, pigment and filler, it is characterized in that the low softening point bisphenol A epoxide resin is 60～70% weight, the imidazole type solidifying agent is 3～6% weight, light trigger is 0.5～1.0% weight, flow agent is 1～2% weight, and defoamer is 0.5～1.0% weight, and pigment and filler are 20～35% weight; The oxirane value of described low softening point bisphenol A epoxide resin is 0.1～0.22, and softening temperature is 76～85 ℃; Described imidazole type solidifying agent comprises the 2-benzylimidazoline, 2-ethyl imidazol(e) or 2-propyl imidazole a kind of, and fusing point is 60～100 ℃.
2. thermo-sensitive epoxy resin powder paint according to claim 1, it is characterized in that the low softening point bisphenol A epoxide resin is 60% weight, 2-benzylimidazoline solidifying agent is 3% weight, light trigger is 1% weight, flow agent is 1% weight, defoamer is 1% weight, and color stuffing is 34% weight.
3. thermo-sensitive epoxy resin powder paint according to claim 1, it is characterized in that the low softening point bisphenol A epoxide resin is 65% weight, 2-ethyl imidazol(e) solidifying agent is 4% weight, light trigger is 0.8% weight, flow agent is 1.1% weight, defoamer is 1.0% weight, and pigment is 0.1% weight, and filler is 28% weight.
4. thermo-sensitive epoxy resin powder paint according to claim 1, it is characterized in that the low softening point bisphenol A epoxide resin is 70% weight, 2-propyl imidazole solidifying agent is 5% weight, light trigger is 1.0% weight, flow agent is 0.5% weight, defoamer is 0.5% weight, and pigment is 1.0% weight, and filler is 22% weight.
5. thermo-sensitive epoxy resin powder paint according to claim 1 is characterized in that 120 ℃ of powder coating solidification conditions～130 ℃/16min.
6. the manufacture method of thermo-sensitive epoxy resin powder paint according to claim 1, when it is characterized in that melt extruding in screw extrusion press, the machine cavity temperature is at 88～92 ℃, and extruder temperature is 98～102 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610155701A CN100999642B (en) | 2006-12-31 | 2006-12-31 | Thermo-sensitive epoxy resin powder paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610155701A CN100999642B (en) | 2006-12-31 | 2006-12-31 | Thermo-sensitive epoxy resin powder paint |
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| CN100999642A CN100999642A (en) | 2007-07-18 |
| CN100999642B true CN100999642B (en) | 2010-05-19 |
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| CN200610155701A Expired - Fee Related CN100999642B (en) | 2006-12-31 | 2006-12-31 | Thermo-sensitive epoxy resin powder paint |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643611B (en) * | 2008-08-05 | 2012-01-25 | 上海海隆赛能新材料有限公司 | Steel pipe epoxy anti-corrosion powder low-temperature curing coating for over-X80 grade oil and gas pipes |
| CN101709195A (en) * | 2009-12-25 | 2010-05-19 | 广州擎天实业有限公司 | Pure epoxy powder coating for coating bakelite board and preparation method thereof |
| CN102676011B (en) * | 2012-05-29 | 2014-02-19 | 山东朗法博粉末涂装科技有限公司 | Ultralow temperature cured powder paint and application method thereof |
| CN103031038B (en) * | 2012-12-25 | 2016-01-06 | 广东科德化工实业有限公司 | Cathode electrophoresis dope of a kind of low-temperature curing and preparation method thereof and using method |
| CN103122199A (en) * | 2013-02-27 | 2013-05-29 | 山东朗法博粉末涂装科技有限公司 | Ultra-low-temperature curing dual-component powder coating and preparation method thereof |
| CN103483969A (en) * | 2013-09-03 | 2014-01-01 | 蚌埠市鸿安精密机械有限公司 | Thermosensitive epoxy resin powder coating |
| CN103980796A (en) * | 2014-04-18 | 2014-08-13 | 陆霞芸 | Preparation method of low-carbon corrosion-resistant coating |
| CN104177985A (en) * | 2014-08-30 | 2014-12-03 | 三正集团股份有限公司 | Thermo-sensitive epoxy resin powder coating |
| CN104530909B (en) * | 2014-12-29 | 2017-02-01 | 浙江明泉工业涂装有限公司 | Powder coating for low-temperature solidified wine bottle and preparation method thereof |
| CN106167668A (en) * | 2016-08-30 | 2016-11-30 | 福建万顺粉末涂料有限公司 | Pure epoxy system low-cure coating composition and coating material thereof for carbon fiber base material |
| CN116426192A (en) * | 2023-03-02 | 2023-07-14 | 庞贝捷粉末涂料(上海)有限公司 | Low temperature curing powder coating compositions |
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2006
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