CN106366862A - Curing-free electrostatic powder coating and preparation method thereof - Google Patents
Curing-free electrostatic powder coating and preparation method thereof Download PDFInfo
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- CN106366862A CN106366862A CN201610976172.1A CN201610976172A CN106366862A CN 106366862 A CN106366862 A CN 106366862A CN 201610976172 A CN201610976172 A CN 201610976172A CN 106366862 A CN106366862 A CN 106366862A
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- Prior art keywords
- powder coating
- curing
- electrostatic powder
- solidify
- exempting
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- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- 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
- C09D5/035—Coloring agents, e.g. pigments
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a curing-free electrostatic powder coating and a preparation method thereof. The curing-free electrostatic powder coating is prepared from, by mass, 40-70% of resin, 15-43% of filler (barium or calcium), 0.7-1.5% of flatting agent, 0.7-1.5% of lustre-enhancing agent, 0.3-0.5% of benzoin, 10-25% of ordinary curing agent, 0.3-2% of rapid curing agent and 3-15% of pigment. All the raw material ingredients are weighed according to the mass ratio, and placed in a mixing cylinder in sequence, mixed and crushed for 3-8 minutes, and then conveyed in a double-screw extruder or a single screw extruder for coarse crushing to obtain fine and homogeneous sheet material; the sheet material is ground with an ACM pulverizer, screened and graded, and thus the required coating is obtained. The preparation method for the curing-free electrostatic powder coating omits the steps of solidification in a curing oven after spray, the construction time is shortened, the investment of curing equipment is saved, the production cost is saved, the product cost is reduced, and great social benefits are created.
Description
Technical field
The present invention relates to a kind of powder coating technology field, more particularly, to a kind of electrostatic powder coating exempting to solidify and its system
Preparation Method.
Background technology
Electrostatic powder coating is the coating gushing out by spray gun, makes powder particle negatively charged while dispersion, powered
The powder particle of lotus is subject to the effect of air-flow other active forces such as (or) centrifugal force and electrostatic attraction, applies to the coated article being grounded
On, then heat melting and solidification film forming.It is high that electrostatic powder coating has solvent-free property, non-environmental-pollution, Powder Recovery and utilization rate
The features such as, industrial coating field accounts for leading position.The coating procedure of epoxy powder coating needs to heat levelling and add
Curing process.Because solidification process needs to be incubated the specific time under specified temp in holding furnace, waste time and energy, efficiency
Low, affect duration and cost.
Increasing to the demand of the energy with various countries, reduce production technology, reduce energy resource consumption, environmental protection becomes enterprise
The main body of industry development.Patent No. 200610155701.8 " thermo-sensitive epoxy resin powder paint " adopts the low-temperature solid of imidazole type
The epoxy resin of agent, light trigger and levelling agent and low melting glass interacts, and has low-temperature fast-curing performance.Light draws
The addition resultant effect sending out agent is to reduce solidification temperature, improves curing rate.But workpiece remains a need for a constant temperature in holding furnace
Degree is lower to solidify certain time, and curing apparatus and energy resource consumption still need to put into significantly cost.
Content of the invention
In order to reduce production technology, fast setting, reduce input and the energy resource consumption of equipment, thus improve production efficiency,
Save production cost, the present invention provides a kind of electrostatic powder coating exempted from and solidify and preparation method thereof.
The technical scheme is that the percent mass of the described component of electrostatic powder coating exempting to solidify and each component
Than
(wt.%) as follows:
Resin: 40-70%,
Filler (barium or calcium): 15-43%,
Levelling agent: 0.7-1.5%,
Optical brightener: 0.7-1.5%,
Benzoinum: 0.3-0.5%,
Common curing agents: 10%-25%,
Quick curing agent: 0.3%-2%,
Pigment: 3-15%.
Further, described resin is modified epoxy resin, and its epoxide equivalent is 750-800g/eq.
The preparation method of described electrostatic powder coating is:
(1) dispensing: all dispensings are weighed by proportioning；
(2) mix: render to dispensing in compounding jar in order, mix and crush 3-8 minute；
(3) tabletting: material enters twin screw or single screw extruder, the screw speed of extruder controls in 200-300r/
Min, temperature control is extruded at 90-120 DEG C, through to roller, steel band cooling, coarse crushing is to tiny, uniform sheet material；
(4) crush: ground with acm flour mill, cross 180 mesh -200 mesh sieve, by exchanging the filter screen of different meshes, that is, obtain
The powdery paints of desired particle size；
(5) reclaim: the raw material tailing over, it is placed again into acm flour mill and carry out secondary grinding thus obtaining desired particle size powder
Coating, reuses, and saves raw material.
The invention has the beneficial effects as follows: the present invention passes through to adjust in formula the species of firming agent and ratio so as to coating exists
After spraying, while workpiece waste heat levelling being utilized, fast setting, need not enter curing oven again and carry out the insulation under specified temp
Solidification, compares existing process, shortens the 30%-50% engineering time, largely improve production efficiency；Save curing apparatus
Put into, saved construction cost, reduce product cost, have great social benefit.
Specific embodiment
The technology contents of the present invention are described below by way of particular specific embodiment, those skilled in the art can be by this theory
The content that bright book discloses understands other advantages and effect of the present invention easily.The present invention also can pass through other different concrete realities
Apply example to be implemented or apply, the every details in present specification also can be based on different viewpoints and application, without prejudice to this
Carry out various modification and change under bright spirit.
Powdery paints be a kind of new without solvent 100% solid powdery coating.At normal temperatures, store stable, warp
Electrostatic spraying or fluidized bed dipping, are heating and curing and form the permanent film of smooth, reach decoration and etch-proof purpose.
It is mainly used in the industries such as ship, pipeline, automobile, building it is therefore necessary to industry standard to be met both ways.
1st, the mechanical performance of film
2nd, the toxicity requirements of film
The mechanical performance of film is mainly the detection of the important indicator such as impact strength, adhesive force, corrosion resistance, toughness.
Because powdery paints is applied in life gradually, so the toxicity detection of film is an important test event, mainly
It is immersed in water by the frock that painting is installed, every a test period, detect whether water becomes cloudy, whether have impurity to separate out,
The oxygen consumption of immersion system whether within the scope of, to judge whether it contains toxicant with this.
The electrostatic powder coating of the present invention, using following scheme:
Embodiment 1
A kind of electrostatic powder coating exempting to solidify, the mass percent (wt.%) of its component and each component is as follows:
Resin: 43%,
Filler (barium or calcium): 40%,
Levelling agent: 1.4%,
Optical brightener: 1.4%,
Benzoinum: 0.5%,
Common curing agents: 10%,
Quick curing agent: 0.5%,
Pigment: 3.2%,
The electrostatic powder coating preparation method more than exempting to solidify is:
(1) dispensing: all dispensings are weighed by above proportioning；
(2) mix: will render in compounding jar in order, and mix and crush 3-8 minute；
(3) tabletting: material enters twin screw or single screw extruder, the screw speed of extruder controls in 200-300r/
Min, temperature control is extruded at 90-120 DEG C, through to roller, steel band cooling, coarse crushing is to tiny, uniform sheet material；
(4) crush: ground with acm flour mill, cross 180 mesh -200 mesh sieve, by exchanging the filter screen of different meshes, that is, obtain
The powdery paints of desired particle size；
(5) reclaim: the raw material tailing over, it is placed again into acm flour mill and carry out secondary grinding thus obtaining desired particle size powder
Coating.Embodiment 2
A kind of electrostatic powder coating exempting to solidify, the mass percent (wt.%) of its component and each component is as follows:
Resin: 55%,
Filler (barium or calcium): 25%,
Levelling agent: 1.1%,
Optical brightener: 1%,
Benzoinum: 0.4%,
Common curing agents: 13%,
Quick curing agent: 1%,
Pigment: 3.5%.
The electrostatic powder coating preparation method more than exempting to solidify is:
(1) dispensing: all dispensings are weighed by above proportioning；
(2) mix: render to dispensing in compounding jar in order, mix and crush 3-8 minute；
(3) tabletting: material enters twin screw or single screw extruder, the screw speed of extruder controls in 200-300r/
Min, temperature control is extruded at 90-120 DEG C, through to roller, steel band cooling, coarse crushing is to tiny, uniform sheet material；
(4) crush: ground with acm flour mill, cross 180 mesh -200 mesh sieve, by exchanging the filter screen of different meshes, that is, obtain
The powdery paints of desired particle size；
(5) reclaim: the raw material tailing over, it is placed again into acm flour mill and carry out secondary grinding thus obtaining desired particle size powder
Coating.Embodiment 3
A kind of electrostatic powder coating exempting to solidify, the mass percent (wt.%) of its component and each component is as follows:
Resin: 65%,
Filler (barium or calcium): 15%,
Levelling agent: 0.7%,
Optical brightener: 0.8%,
Benzoinum: 0.3%,
Common curing agents: 10%,
Quick curing agent: 0.3%,
Pigment: 7.9%.
The electrostatic powder coating production method more than exempting to solidify is:
(1) dispensing: all dispensings are weighed by above proportioning；
(2) mix: render to dispensing in compounding jar in order, mix and crush 3-8 minute；
(3) tabletting: material enters twin screw or single screw extruder, the screw speed of extruder controls in 200-300r/
Min, temperature control is extruded at 90-120 DEG C, through to roller, steel band cooling, coarse crushing is to tiny, uniform sheet material；
(4) crush: ground with acm flour mill, cross 180 mesh -200 mesh sieve, by exchanging the filter screen of different meshes, that is, obtain
The powdery paints of desired particle size；
(5) reclaim: the raw material tailing over, it is placed again into acm flour mill and carry out secondary grinding thus obtaining desired particle size powder
Coating.
The molecular structure of epoxy resin is to be its feature containing active epoxide group with strand, and epoxide group is permissible
Positioned at the end of strand, middle or circlewise structure.Due to containing active epoxide group in molecular structure, make them can be with
Polytype firming agent crosslinks reaction and is formed and insoluble have the cancellated high polymer of three-dimensional.Epoxy after solidification
Resin has good physics, chemical property, and it has excellent adhesive strength, dielectric to the surface of metal and nonmetallic materials
Functional, set shrinkage factor is little, product size good stability, and hardness is high, and pliability is preferably, steady to alkali and most of solvent
Fixed, there is very strong corrosion resistance.Therefore, in powdery paints the species and content of firming agent selection to the performance of product and after
Phase spraying coating process plays conclusive effect.Invention introduces a kind of quick curing agent, the workpiece of application can be made to utilize remaining
Hot fast setting, time-consuming and technique.
Filler is also referred to as extender pigment, and this pigmenting power and covering power are less, is white and colourless ultra-fine powder.
It is dispersed in the mechanical strength that can improve powdery paints in powdery paints and other protective value, powder together with coloring pigment
The coating that coating uses should possess following performance: (1) water insoluble and organic solvent, has good dispersibility, colourless or white
Color, without the ultra-fine powder of various impurity；(2) acidproof, alkaline-resisting, good weatherability；(3) low cost, but do not reduce film items
Energy.In powdery paints, conventional packing variety has blanc fixe, blanc fixe, precipitated calcium carbonate, ground calcium carbonate, kaolinite
Soil, Pulvis Talci, bentonite, precipitated silica, mica powder, silica flour, silicon powder etc..The present invention mainly use for sulfur acid
Barium or/and Calcium Carbonate.
Powder coating additive of the present invention mainly includes levelling agent, optical brightener, Benzoinum, and Benzoinum, as degasser, reduces
The phenomenon of bubbling after spraying.Benzoinum is white or light yellow tasteless crystal, and 137 DEG C of fusing point, 344 DEG C of boiling point are slightly soluble in water and second
Ether, is dissolved in hot acetone and hot ethanol, is the most frequently used degasser of powdery paints.
In the present invention, the combination of various composition, so that the coating intensity of the present invention increases, reaches fast setting purpose.When long
Between use during, coating shedding will not be caused, adhesive force is strong.
Although this patent is explained with reference to preferred embodiment, but above-mentioned explanation should be regarded as illustrative rather than limit
Property processed, change and modification that those skilled in the art is made according to the spirit of the present invention, the protection domain of this patent all should be belonged to.
Claims (3)
1. a kind of electrostatic powder coating exempting to solidify it is characterised in that the described component of electrostatic powder coating exempting to solidify and
The mass percent (wt.%) of each component is as follows:
Resin: 40-70%,
Filler (barium or calcium): 15-43%,
Levelling agent: 0.7-1.5%,
Optical brightener: 0.7-1.5%,
Benzoinum: 0.3-0.5%,
Common curing agents: 10%-25%,
Quick curing agent: 0.3-2%,
Pigment: 3-15%.
2. according to claim 1 a kind of electrostatic powder coating exempting to solidify it is characterised in that described resin is modified
Epoxy resin, its epoxide equivalent is 750-800g/eq.
3. a kind of preparation method of the electrostatic powder coating exempting to solidify is it is characterised in that prepare according to the following steps:
(1) dispensing: all dispensings are weighed by proportioning；
(2) mix: render to dispensing in compounding jar in order, mix and crush 3-8 minute；
(3) tabletting: material enters twin screw or single screw extruder, and the screw speed of extruder controls in 200-300r/min,
Temperature control is extruded at 90-120 DEG C, through to roller, steel band cooling, coarse crushing is to tiny, uniform sheet material；
(4) crush: ground with acm flour mill, cross 180 mesh -200 mesh sieve, by exchanging the filter screen of different meshes, that is, obtain required
The powdery paints of granularity；
(5) reclaim: the raw material tailing over, it is placed again into acm flour mill and carry out secondary grinding thus obtaining desired particle size powdery paints,
Reuse, save raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976172.1A CN106366862A (en) | 2016-11-07 | 2016-11-07 | Curing-free electrostatic powder coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610976172.1A CN106366862A (en) | 2016-11-07 | 2016-11-07 | Curing-free electrostatic powder coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106366862A true CN106366862A (en) | 2017-02-01 |
Family
ID=57893583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610976172.1A Pending CN106366862A (en) | 2016-11-07 | 2016-11-07 | Curing-free electrostatic powder coating and preparation method thereof |
Country Status (1)
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1371950A (en) * | 2001-02-23 | 2002-10-02 | 王晓东 | Solvent-free epoxy resin paint |
| CN101469147A (en) * | 2008-08-20 | 2009-07-01 | 江苏兰陵高分子材料有限公司 | Friction electrostatic painting infrared ray cured powder paint for electromagnetic wire and lacquered wire, preparation and use thereof |
| 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 |
| CN102643595A (en) * | 2012-04-27 | 2012-08-22 | 天津翔盛粉末涂料有限公司 | Fired epoxy powder coating special for hot rolling coating of large-caliber steel pipes |
| CN102993910A (en) * | 2012-12-10 | 2013-03-27 | 天津翔盛粉末涂料有限公司 | Anticorrosion conductive powder coating for mine anchoring steel strands |
| CN103146286A (en) * | 2012-12-27 | 2013-06-12 | 上海海隆赛能新材料有限公司 | Fast cured epoxy powder coating composition and preparation method thereof |
| CN103509431A (en) * | 2013-08-26 | 2014-01-15 | 广州擎天材料科技有限公司 | Pure epoxy heavy anticorrosive powder paint used for coating building steel bars and preparation method thereof |
| CN103788822A (en) * | 2014-01-20 | 2014-05-14 | 老虎粉末涂料制造（太仓）有限公司 | Powder coating for banding edge of heat sensitive substrate as well as edge banding coating and preparation method thereof |
| CN104710908A (en) * | 2015-03-23 | 2015-06-17 | 阜阳市诗雅涤新材料科技有限公司 | Special anticorrosion conductive powder coating for vertical shaft fluidized bed dip-coating as well as preparation method and application of coating |
-
2016
- 2016-11-07 CN CN201610976172.1A patent/CN106366862A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1371950A (en) * | 2001-02-23 | 2002-10-02 | 王晓东 | Solvent-free epoxy resin paint |
| CN101469147A (en) * | 2008-08-20 | 2009-07-01 | 江苏兰陵高分子材料有限公司 | Friction electrostatic painting infrared ray cured powder paint for electromagnetic wire and lacquered wire, preparation and use thereof |
| 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 |
| CN102643595A (en) * | 2012-04-27 | 2012-08-22 | 天津翔盛粉末涂料有限公司 | Fired epoxy powder coating special for hot rolling coating of large-caliber steel pipes |
| CN102993910A (en) * | 2012-12-10 | 2013-03-27 | 天津翔盛粉末涂料有限公司 | Anticorrosion conductive powder coating for mine anchoring steel strands |
| CN103146286A (en) * | 2012-12-27 | 2013-06-12 | 上海海隆赛能新材料有限公司 | Fast cured epoxy powder coating composition and preparation method thereof |
| CN103509431A (en) * | 2013-08-26 | 2014-01-15 | 广州擎天材料科技有限公司 | Pure epoxy heavy anticorrosive powder paint used for coating building steel bars and preparation method thereof |
| CN103788822A (en) * | 2014-01-20 | 2014-05-14 | 老虎粉末涂料制造（太仓）有限公司 | Powder coating for banding edge of heat sensitive substrate as well as edge banding coating and preparation method thereof |
| CN104710908A (en) * | 2015-03-23 | 2015-06-17 | 阜阳市诗雅涤新材料科技有限公司 | Special anticorrosion conductive powder coating for vertical shaft fluidized bed dip-coating as well as preparation method and application of coating |
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Application publication date: 20170201 |