CN102775887A - Weather-resistant metal type powder coating for aluminum profiles and preparation method thereof - Google Patents
Weather-resistant metal type powder coating for aluminum profiles and preparation method thereof Download PDFInfo
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- CN102775887A CN102775887A CN2012103017556A CN201210301755A CN102775887A CN 102775887 A CN102775887 A CN 102775887A CN 2012103017556 A CN2012103017556 A CN 2012103017556A CN 201210301755 A CN201210301755 A CN 201210301755A CN 102775887 A CN102775887 A CN 102775887A
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Abstract
The invention belongs to the technical field of new materials and discloses a weather-resistant metal type powder coating for aluminum profiles and a preparation method thereof. The coating is prepared from the following raw materials in percentage by weight: 91.2-95% of weather-resistant polyester transparent powder coating, 4.2-8% of metal pigment and 0.4-0.8% of auxiliary. The preparation method comprises the following steps of: putting the weather-resistant polyester transparent powder coating, the metal pigment and the auxiliary into a bonding equipment mixing cylinder for bonding; warming and starting to stir; cooling after thermal insulation; and discharging and packaging to obtain the product.
Description
Technical field
The invention belongs to new material technology field, relate to a kind of powder coating and preparation method thereof, particularly a kind of aluminium section bar is with high weather-proof metal type powder coating and preparation method thereof.
Background technology
Metal type powder coating can be divided into two kinds on imitative chromium plating (or gold-plated) and flash metal luster type by appearance of film.Along with the raising of expanding economy and living standards of the people, energy-conserving and environment-protective are had higher requirement.Existing metal type powder coating; Because the vibrin weathering resistance that adopts is poor; Metallic pigment do not adopt coating to handle and in the preparation process, only adopt reason such as simple mechanically mixing method, and metallic pigment are lost metalluster very soon under the corrosion of atmospheric medium.And produce and construction in because flying upward of metallic pigment causes environmental pollution, also cause the waste of a large amount of metallic pigment.There is following shortcoming in existing metal type powder coating:
(1) transparent bed material adopts polyester/TGIC or vinylformic acid more, and outside durabitity is relatively poor relatively.
(2) metallic pigment are handled through coating, and are very easily oxidized or by dielectric corrosion in the atmosphere, and lose metalluster very soon.
(3) the common mechanical blending means that adopts, it is uneven to cause metallic pigment to mix, and metallic pigment produce and the working-yard in produce and fly upward, contaminate environment but also cause the waste of metallic pigment not only.
(4) the recovery powder of working-yard can not be recycled, and handles trouble.
(5) metallic pigment are prone to be deposited in gun slot, the obstruction spray gun makes its normally spraying application.
Summary of the invention
In order to solve the weak point that prior art exists, primary and foremost purpose of the present invention is to provide a kind of aluminium section bar with high weather-proof metal type powder coating.
Another object of the present invention is to provide the preparation method of above-mentioned aluminium section bar with high weather-proof metal type powder coating.
A purpose more of the present invention is to provide the application of above-mentioned aluminium section bar with high weather-proof metal type powder coating.
The object of the invention is realized through following technical scheme:
A kind of aluminium section bar is formed by following raw material preparing by mass percentage with high weather-proof metal type powder coating:
High weatherable polyether transparent powder paint 91.2～95%
Metallic pigment 4.2～8%
Auxiliary agent 0.4～0.8%.
Said high weatherable polyether transparent powder paint is for using the transparent powder paint of saturated terminal carboxyl polyester resin as the main raw material preparation.
The preparation method of said high weatherable polyether transparent powder paint is according to following operation steps:
With mass percent is that 88.5% saturated terminal carboxyl polyester resin, mass percent are that 6.7% isocyanuric acid three-glycidyl ester (TGIC), mass percent are that 2% flow agent, mass percent are that 2% brightening agent and mass percent are that 0.8% st-yrax drops into pre-mixing in the compounding jar together, and the starting material after the pre-mixing are melt extruded and are pressed into sheet stock; After sheet stock was cooled to 25 ℃, the fine powder coating that is ground into was carried out in fragmentation then; Used for powder coating 200 eye mesh screens are sieved, obtain high weatherable polyether transparent powder paint transparent powder paint.
Described metallic pigment are to adopt the floating type of silicon-dioxide coating processing or the aluminium silver powder and the copper bronze of non-floating type.
Said auxiliary agent is a macromolecule wax.
Described aluminium section bar comprises following operation steps with the preparation method of high weather-proof metal type powder coating:
(1) metallic pigment of the high weatherable polyether transparent powder paint of mass percent 91.2～95%, mass percent 4.2～8% and mass percent 0.4～0.8% are dropped into to carry out nation in nation's locking equipment compounding jar fixed;
(2) heat up and start stirring;
(3) insulation back cooling;
(4) discharging, packing obtains aluminium section bar with high weather-proof metal type powder coating.
The said intensification of step (2) be meant with nation's locking equipment batch mixing cylinder temperature in 25～30 minutes from 65～75 ℃ of 20～25 ℃ of critical second-order transition temperatures that rise to high weatherable polyether transparent powder paint, the speed of said stirring is 30～40Hz.
The said insulation of step (3) is meant when nation's locking equipment batch mixing cylinder temperature is raised to the critical second-order transition temperature of high weatherable polyether transparent powder paint, kept 5～10 minutes; Said cooling is for reducing to 20～25 ℃.
Described a kind of aluminium section bar is with the application of high weather-proof metal type powder coating in the aluminium section bar spraying.
The weather-proof metal type powder coating of height of the present invention; Overcome the many disadvantages of original metal type powder coating; Except the aluminium section bar that is applied to construction industry, aluminium smallpox, aluminum screen wall, also be widely used in the application of steel furniture, bike, motorcycle, household electrical appliance, automobile component etc.The present invention mainly is to be main raw material with saturated terminal carboxyl polyester resin, be processed into high weatherable polyether transparent powder paint after, add the metallic pigment that treated pair of film coats, a kind of high weather-proof metal type powder coating that utilizes nation's locking equipment to be processed into.
The present invention with the principle that nation decides the prepared metal type powder coating is:
Nation decides unit and adopts ASIC micro computer PLC intelligence operation and control; Nation's locking equipment can accurately provide powder coating clear bottom powder critical second-order transition temperature Tg; Under this temperature; Resin particle in the powder coating is softened, and under the stirring rake effect, the remollescent resin particle mixes with the metallic pigment uniform particles and be effectively bonding.Each resin particle can both bonding one or many metals (or pearly-lustre) pigment particles.And can not take place bondingly each other between the resin particle, still keep its original free-running property.
The present invention possesses following outstanding advantage and effect with respect to prior art:
(1) replaces terephthalic acid used in traditional vibrin with m-phthalic acid in the prescription of the saturated terminal carboxyl polyester resin of the present invention's employing, make the rigidity of polyester macromolecule strengthen, thereby the weathering resistance of saturated terminal carboxyl polyester resin is significantly improved.And adopt and thisly have high weatherable polyester powder coating as the clear bottom powder, its weathering resistance scribbles significantly than existing polyester/TG1C and acrylic clear powder and improves.
(2) metallic pigment adopt silicon-dioxide double-contracting membrane technique, when making its oxidation illumination in receiving atmosphere with dielectric corrosion, protect its metalluster forever owing to there being silicon dioxide protective film.
(3) adopt present most advanced world nation decide technology, equipment, can automatically accomplish reinforced, nation is fixed, pack.Equipment is safe and reliable to operation, saves time, saving of labor, energy-conservation, remarkable high labour productivity.
(4) owing to adopted metallic pigment to align auxiliary agent; Make metallic pigment in coating melting and solidification process, can produce ordered arrangement, thereby make the metal effect of the generation of filming better; And can save a large amount of metallic pigment, reduce the production cost of metal powder coating.
(5) adopt the fixed metal type powder coating of nation, can save metallic pigment more than 50%, use but reclaim powder recycling.
(6) do not stop up spray gun, can not cause environmental pollution, it is safer to produce, construct.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description, but embodiment of the present invention is not limited thereto.
Embodiment 1
(1) the high weatherable polyether transparent powder paint transparent powder paint of preparation:
Wherein, saturated terminal carboxyl polyester resin is bought in the emerging resin of Supreme Being (Kunshan) ltd.
According to above-mentioned prescription starting material are dropped into pre-mixing in the compounding jar together, the starting material after the pre-mixing are melt extruded and are pressed into sheet stock; After sheet stock was cooled to 25 ℃, the fine powder coating that is ground into was carried out in fragmentation then; Used for powder coating 200 eye mesh screens are sieved, obtain high weatherable polyether transparent powder paint transparent powder paint.
(2) the preparation aluminium section bar is with high weather-proof metal type powder coating:
High weatherable polyether transparent powder paint 91.2%
Metallic pigment 8%
Auxiliary agent 0.8%
According to above-mentioned prescription starting material are dropped into nation's locking equipment compounding jar together, in 30 minutes, the temperature of nation's locking equipment compounding jar is risen to 75 ℃ by 25 ℃, stir in the temperature-rise period, stirring velocity is 40Hz.Be incubated 10 minutes down at 75 ℃, make metallic pigment and powder coating resin particle accomplish nation and decide.After after nation accomplishes surely temperature of charge being reduced to 25 ℃, after product packed, promptly obtain aluminium section bar with high weather-proof metal type powder coating finished product.
The high weather-proof metal type powder coating of above-mentioned gained is carried out each item Performance Detection, and the result is following:
Shock resistance, the 3.3mm distortion, nothing comes off
Humidity resistance, 3000hr, no bubble
Salt fog resistance, 3000hr, no bubble (1-2mm cut)
Weathering resistance, the light rate is protected in xenon lamp 1000Hr irradiation, and 91%,, aberration △ E=2.5.
Embodiment 2
(1) the high weatherable polyether transparent powder paint transparent powder paint of preparation:
Wherein, saturated terminal carboxyl polyester resin is bought in the emerging resin of Supreme Being (Kunshan) ltd.
According to above-mentioned prescription starting material are dropped into pre-mixing in the compounding jar together, the starting material after the pre-mixing are melt extruded and are pressed into sheet stock; After sheet stock was cooled to 25 ℃, the fine powder coating that is ground into was carried out in fragmentation then; Used for powder coating 200 eye mesh screens are sieved, obtain high weatherable polyether transparent powder paint transparent powder paint.
(2) the preparation aluminium section bar is with high weather-proof metal type powder coating:
High weatherable polyether transparent powder paint 95%
Metallic pigment 4.2%
Auxiliary agent 0.8%
According to above-mentioned prescription starting material are dropped into nation's locking equipment compounding jar together, in 25 minutes, the temperature of nation's locking equipment compounding jar is risen to 65 ℃ by 20 ℃, stir in the temperature-rise period, stirring velocity is 30Hz.Be incubated 5 minutes down at 65 ℃, make metallic pigment and powder coating resin particle accomplish nation and decide.After after nation accomplishes surely temperature of charge being reduced to 25 ℃, after product packed, promptly obtain aluminium section bar with high weather-proof metal type powder coating finished product.
The high weather-proof metal type powder coating of above-mentioned gained is carried out each item Performance Detection, and the result is following:
Shock resistance, the 3.1mm distortion, nothing comes off
Humidity resistance, 3000hr, no bubble
Salt fog resistance, 3000hr, no bubble (1-2mm cut)
Weathering resistance, the light rate is protected in xenon lamp 1000Hr irradiation, and 92%,, aberration △ E=2.3.
Embodiment 3
(1) the high weatherable polyether transparent powder paint transparent powder paint of preparation:
Wherein, saturated terminal carboxyl polyester resin is bought in the emerging resin of Supreme Being (Kunshan) ltd.
According to above-mentioned prescription starting material are dropped into pre-mixing in the compounding jar together, the starting material after the pre-mixing are melt extruded and are pressed into sheet stock; After sheet stock was cooled to 25 ℃, the fine powder coating that is ground into was carried out in fragmentation then; Used for powder coating 200 eye mesh screens are sieved, obtain high weatherable polyether transparent powder paint transparent powder paint.
(2) the preparation aluminium section bar is with high weather-proof metal type powder coating:
High weatherable polyether transparent powder paint 93.6%
Metallic pigment 6%
Auxiliary agent 0.4%
According to above-mentioned prescription starting material are dropped into compounding jar together, in 28 minutes, the temperature of nation's locking equipment compounding jar is risen to 70 ℃ by 23 ℃, stir in the temperature-rise period, stirring velocity is 35Hz.Be incubated 7 minutes down at 70 ℃, make metallic pigment and powder coating resin particle accomplish nation and decide.After after nation accomplishes surely temperature of charge being reduced to 25 ℃, after product packed, promptly obtain aluminium section bar with high weather-proof metal type powder coating finished product.
The high weather-proof metal type powder coating of above-mentioned gained is carried out each item Performance Detection, and the result is following:
Shock resistance, the 3.0mm distortion, nothing comes off
Humidity resistance, 3000hr, no bubble
Salt fog resistance, 3000hr, no bubble (1-2mm cut)
Weathering resistance, the light rate is protected in xenon lamp 1000Hr irradiation, and 93%,, aberration △ E=2.1.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. an aluminium section bar is characterized in that with high weather-proof metal type powder coating: this metal type powder coating is formed by following raw material preparing by mass percentage:
High weatherable polyether transparent powder paint 91.2～95%
Metallic pigment 4.2～8%
Auxiliary agent 0.4～0.8%.
2. a kind of aluminium section bar according to claim 1 is characterized in that with high weather-proof metal type powder coating: said high weatherable polyether transparent powder paint is for using the transparent powder paint of saturated terminal carboxyl polyester resin as the main raw material preparation.
3. a kind of aluminium section bar according to claim 1 is characterized in that with high weather-proof metal type powder coating: the preparation method of said high weatherable polyether transparent powder paint is according to following steps:
With mass percent is that 88.5% saturated terminal carboxyl polyester resin, mass percent are that 6.7% isocyanuric acid three-glycidyl ester, mass percent are that 2% flow agent, mass percent are that 2% brightening agent and mass percent are that 0.8% st-yrax drops into pre-mixing in the compounding jar together, and the starting material after the pre-mixing are melt extruded and are pressed into sheet stock; After sheet stock was cooled to 25 ℃, the fine powder coating that is ground into was carried out in fragmentation then; Used for powder coating 200 eye mesh screens are sieved, obtain high weatherable polyether transparent powder paint transparent powder paint.
4. a kind of aluminium section bar according to claim 1 is characterized in that with high weather-proof metal type powder coating: described metallic pigment are to adopt the floating type of silicon-dioxide coating processing or the aluminium silver powder and the copper bronze of non-floating type.
5. a kind of aluminium section bar according to claim 1 is characterized in that with high weather-proof metal type powder coating: said auxiliary agent is a macromolecule wax.
6. according to the preparation method of each described aluminium section bar of claim 1～5, it is characterized in that comprising following operation steps with high weather-proof metal type powder coating:
(1) metallic pigment of the high weatherable polyether transparent powder paint of mass percent 91.2～95%, mass percent 4.2～8% and mass percent 0.4～0.8% are dropped into to carry out nation in nation's locking equipment compounding jar fixed;
(2) heat up and start stirring;
(3) insulation back cooling;
(4) discharging, packing obtains aluminium section bar with high weather-proof metal type powder coating.
7. preparation method according to claim 6 is characterized in that: the said intensification of step (2) be meant with nation's locking equipment batch mixing cylinder temperature in 25～30 minutes from 65～75 ℃ of 20～25 ℃ of critical second-order transition temperatures that rise to high weatherable polyether transparent powder paint; The speed of said stirring is 30～40Hz.
8. preparation method according to claim 6 is characterized in that: the said insulation of step (3) is meant when nation's locking equipment batch mixing cylinder temperature is raised to the critical second-order transition temperature of high weatherable polyether transparent powder paint, kept 5～10 minutes; Said cooling is for reducing to 20～25 ℃.
9. a kind of aluminium section bar according to claim 1 is with the application of high weather-proof metal type powder coating in the aluminium section bar spraying.
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| CN201210301755.6A CN102775887B (en) | 2012-08-23 | 2012-08-23 | Weather-resistant metal type powder coating for aluminum profiles and preparation method thereof |
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| CN201210301755.6A CN102775887B (en) | 2012-08-23 | 2012-08-23 | Weather-resistant metal type powder coating for aluminum profiles and preparation method thereof |
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| CN102775887A true CN102775887A (en) | 2012-11-14 |
| CN102775887B CN102775887B (en) | 2014-10-29 |
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| CN103589304A (en) * | 2013-10-24 | 2014-02-19 | 安徽柏拉图涂层织物有限公司 | High-leveling-property bright paint |
| CN103740238A (en) * | 2013-12-12 | 2014-04-23 | 江门市皇宙化工有限公司 | Environment-friendly type high-simulation electroplate aluminum powder powdery paint, preparation method thereof and application thereof |
| CN103820010A (en) * | 2014-03-07 | 2014-05-28 | 广东华江粉末科技有限公司 | Glittering three-dimensional wood grain powder coating for aluminium profiles as well as preparation method and spraying technology of powder coating |
| CN104130677A (en) * | 2014-07-25 | 2014-11-05 | 浙江绿能塑粉有限公司 | Processing method of environmentally-friendly electrosilvering-type powdery coating for replacing electroplating |
| CN104403517A (en) * | 2014-11-12 | 2015-03-11 | 广州擎天材料科技有限公司 | High imitation electroplating silver powder paint and preparation method thereof |
| CN105344566A (en) * | 2015-09-25 | 2016-02-24 | 科威嘉粉末涂料（天津）有限公司 | Preparing and spray coating process for crylic acid and aluminum-silicon combined high-heat-dissipation powder coatings for engine |
| CN105670466A (en) * | 2016-03-03 | 2016-06-15 | 广东睿智环保科技股份有限公司 | Multi-angle color flicker powder paint |
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| CN107337986A (en) * | 2017-06-21 | 2017-11-10 | 浙江绿能塑粉有限公司 | A kind of low separation bonding flash silver powdery paints and preparation method thereof |
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| CN111019489A (en) * | 2019-12-12 | 2020-04-17 | 广东华江粉末科技有限公司 | FEVE fluorocarbon metal powder coating for metal surface and preparation method thereof |
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| WO2022134568A1 (en) * | 2020-12-25 | 2022-06-30 | 广东西敦千江粉漆科学研究有限公司 | Antistatic powder coating and preparation method therefor |
| CN114316752A (en) * | 2021-12-23 | 2022-04-12 | 老虎表面技术新材料（清远）有限公司 | Powder coating composition with stable pearl feel, preparation method thereof and coating |
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