CN106752756A - A kind of high speed infrared solidification levelling powdery paints and preparation method thereof - Google Patents
A kind of high speed infrared solidification levelling powdery paints and preparation method thereof Download PDFInfo
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- CN106752756A CN106752756A CN201610993976.2A CN201610993976A CN106752756A CN 106752756 A CN106752756 A CN 106752756A CN 201610993976 A CN201610993976 A CN 201610993976A CN 106752756 A CN106752756 A CN 106752756A
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- powdery paints
- high speed
- levelling
- speed infrared
- solidifies
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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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
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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)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a kind of high speed infrared solidification levelling powdery paints and preparation method thereof, the component of the powdery paints includes polyester resin, curing agent, levelling agent, styrax, inorganic filler, wax powder and pigment.The powdery paints that the present invention is provided solvent resistance is excellent, scratch-resistant performance strong, bend-resistance performance and weather resistance are excellent, and realize fast spraying and the adaptable purpose of near-infrared rapid curing first at home.
Description
Technical field
The present invention relates to a kind of levelling powdery paints and preparation method thereof, more particularly to a kind of high speed infrared solidification levelling powder
Last coating and preparation method thereof.
Background technology
With the fast development of the industry such as China's building, household electrical appliances, communications and transportation nearly ten years, it is quick to the demand of coil on
Rise, coil coating is also fast-developing therewith as a part and parcel for manufacturing coil.At present, it is almost all of pre-
It is all to carry out application using oil-based liquid coating to apply coiled material colored steel.But, have to environment because oil-based liquid coating not only contains
Harmful organic solvent（VOC）Deng, general Coil Coating Products and two need to be applied by two dry, consume the substantial amounts of energy.Coating industry is every
Pollution of the waste water, sludge, waste gas, waste residue of year discharge to environment, the organic matter of volatilization not only causes harm to the body of workman,
Domestic Environment pollution is further aggravated, huge to human body and environmental hazard, Coil Coating Products oil paint has caused country relevant
Department and the highest attention of society, and the environment-friendly type coating for substituting oil paint also becomes imperative.
Stage foreign countries' coil powder coating and their application line focuses mostly in low speed level at this stage, and the country is not to rest on experiment rank
Section, is exactly level of the actual production linear speed in middling speed 15-25m/min, and thickness is at 50-80 μm.And environment-friendlywater-based water-based paint cannot
High speed roller coat is carried out, at present also in experimental stage.Rare linear speed reaches 60-80m/min flying reel powder both at home and abroad simultaneously
The report of last coating.Compared with liquid coil coating, how on quick coil painting line, with powder coil coatings to coiled material
Continuous, uniform application is carried out, and the film after application is quickly solidified, and the length of paint line is not oversize；Together
When again can quickly colour changing, and ensure the colored steel cost after application with maturation liquid coating it is competitive, be one huge
Challenge.
In general, conventional pure polyester powdery paints typically will toast 10-15min under the conditions of 180 DEG C -200 DEG C
How ability completion of cure, realize powdery paints ready coating and rapid curing（25-30s）This target, being one has challenge
The project of property.
Out of doors in pure polyester system, there are polyester/HAA systems and polyester/TGIC systems, because HAA is one more than TGIC
Individual active function groups, so HAA systems reaction speed is better than TGIC systems, while the terminal carboxyl polyester tree of high acid value can be selected
Fat, but traditional hot Baking out mode is to lean on conduction of the heat from outside film internally to solidify, and curing efficiency delays very much
Slowly, quick-setting demand can not be met.Near-infrared is to lean on the highdensity whole film of luminous energy fast strikethrough to solidify, so
Powdery paints rapid curing is set to become possibility by the polyester/HAA systems and infrared curing of high acid value.But, traditional is poly-
Ester resin/HAA systems can not be fully cured when infrared heating is in time 25-30s, and impact, hardness, the MEK of coating are not
The requirement of Coil Coating Products can be met.
The content of the invention
An object of the present invention is to provide a kind of high speed infrared solidification levelling powdery paints, after the powder coating solidification
Coating has excellent solvent resistance, good scratch-resistant performance, excellent buckling performance, and weather resistance is excellent.And
And realize know clearly fast spraying and the adaptable purpose of near-infrared rapid curing first at home.
The second object of the present invention is to provide the preparation method that above-mentioned high speed infrared solidifies levelling powdery paints.
An object of the present invention is realized by following technical measures：A kind of high speed infrared solidification levelling powder is applied
Material, including following weight component：
55 ~ 80 parts of polyester resin
4 ~ 8 parts of curing agent
0.8 ~ 2 part of levelling agent
0.5 ~ 2 part of styrax
5 ~ 35 parts of inorganic filler
Wax powder 0-2 parts
0 ~ 30 part of pigment
Polyester resin of the present invention is terminal carboxyl polyester resin, and acid number is 40-50mgKOH/g, and viscosity is 3000 ~ 5000
（S/200 DEG C of ICI, mPa）Terminal carboxyl polyester resin.The polyester resin is by polyalcohol and polyacid by esterification, polycondensation reaction
Synthesis, adds polyalcohol, dihydroxylic alcohols, aliphatic acid, aromatic acid, Titanium series catalyst, fluorination light-initiated in the polymerization stage of resin
Agent, as reaction is completed, adds the thermal initiator close with half-life period, then cools down broken packing.
Curing agent of the present invention is beta-hydroxy alkylamide.
Levelling agent of the present invention is powdery paints versatility levelling agent, is acrylic polymer.
Wax powder of the present invention includes in micronizing modified polyethylene wax, polypropylene wax powder and polytetrafluoroethylwax wax
Plant or two or more combinations.
Inorganic filler needed for the present invention include one kind in delustring barium sulfate, delustring silicon powder and delustring mica powder or
Several combinations, changing its weight portion can change the viscosity and mobile performance of whole coating.
Pigment of the present invention is the general outdoor type pigment of powdery paints, such as iron oxide red, carbon black, ultramarine, rutile
Type titanium dioxide, iron oxide yellow, phthalocyanine blue, dark green etc..
The second object of the present invention is to be achieved through the following technical solutions：A kind of high speed infrared solidifies levelling powdery paints
Preparation method, comprise the following steps：
（1）Each group is weighed by proportioning to be placed in compounding jar, be sufficiently mixed and crush；
（2）Material after broken is extruded in respectively enteing double screw extruder, and then compressing tablet and cooling down is crushed；
（3）Sheet stock after will be broken is placed in Special grinder for disintegrating to be crushed, then rotated sieve screening packing.
The step（2）Extrusion temperature in middle double screw extruder is 100 DEG C ~ 120 DEG C；The step（3）It is middle through powder
After broken machine is crushed and the average grain diameter D50 that sieves is 25 μm ~ 35 μm.
It is of the invention that there is advantages below compared with existing solvent technology, existing powdery paints：
(1) present invention by add in resin synthesis process side chain cleavage type light trigger and add half-life period with it is fast
Fast hardening time close thermal initiator, has obtained a kind of quick-setting HAA systems high acid value terminal carboxyl polyester resin, realizes
Heated by near infrared radiation rapid curing（25s-30s）The purpose of heating, substitutes traditional long-time（10-15min）Heat
Baking.Meanwhile, coiled material curing agent used for powder coating, accelerator, filler, pigment of preferably domestic and international raw material supplier etc. other
Auxiliary agent, and proportioning test is optimized from the resin for synthesizing, coating layer thickness after the powdery paints near-infrared heated baking that will be obtained
At 20-40 μm, solve what rapid curing and coating key property, salt spray resistance, resistance to MEK were adapted on formula and coating performance
Spraying is required, and meets the requirement of scumbling outward appearance.Relative to traditional oil paint, not only coating hardness is higher, T it is curved and
MEK performances are more excellent, and VOC free is discharged, environment-friendly, and a near-infrared baking molding（Traditional oil paint
Priming paint plus finish paint are needed, twice roller coat, toasted twice, while also needing to the waste gas produced after treatment reaction）, saved a large amount of energy
Source, can progressively substitute the use in Coil Coating Products of conventional oil-based liquid coating.
（2）Basic components from powdery paints of the invention, organic solvent-free, simple production process is once baked into
Type, VOC free discharge, with environment-friendly, the advantages of energy saving, the advantages of free from environmental pollution.
（3）The present invention uses beta-hydroxy alkylamide as curing agent, while adding appropriate side during resins synthesis
Chain crack type photoinitiator, the half-life period thermal initiator close with hardening time accelerates reaction its is reduced solidification temperature, shortens
Hardening time, the crosslink density of coating is improve, while the acid-alkali-corrosive-resisting of coating, water boiling resistance performance and MEK performances are more excellent
It is different.
（4）Coating of the invention and high energy near infrared radiation effect under, solve powdery paints rapid curing（25s-
30s）With the adaptable problem of quick production, not only the country reach quick spray of the powdery paints under 60m/min linear speeds first
Technique is applied, and realizes powdery paints scumbling（20um-40um）Hiding rare is good under state, the features such as flow leveling is good.
Specific embodiment
A part of instantiation is set forth below, and the present invention will be described, it is necessary to it is pointed out here that be specific examples below only
For the invention will be further described, limiting the scope of the invention is not represented.Other people make according to the present invention
Some nonessential modifications and adjustment still fall within protection scope of the present invention.
Embodiment 1
40-45mgKOH/g, viscosity is 3000 ~ 5000（ICI, mPa.s/200 DEG C）70 parts of terminal carboxyl polyester resin
5.5 parts of beta-hydroxy alkylamide
1.2 parts of esters of acrylic acid levelling agent
0.5 part of styrax
25 parts of delustring barium sulfate
5 parts of rutile type titanium white
0.8 part of micronized polyethylene wax
2 parts of phthalocyanine blue
5 parts of ultramarine
0.1 part of carbon black.
The preparation method of powdery paints：
（1）Above-mentioned raw materials input compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, obtain mixing premix material；
（2）Raw material after premixing are carried out into melting mixing with double screw extruder dispersed and extrude, wherein, extruder
The temperature in Ith area is 100-110 DEG C, and the temperature in IIth area is 110-120 DEG C；
（3）After the material that will be obtained is crushed through tabletting machine, cooling, broken, size-reduced machine and the average grain diameter D50 that sieves is
30 μm ~ 35 μm, then pack.
Embodiment 2
45-50mgKOH/g, viscosity is 3000 ~ 5000（ICI, mPa.s/200 DEG C）70 parts of terminal carboxyl polyester resin
5 parts of beta-hydroxy alkylamide
1.5 parts of esters of acrylic acid levelling agent
0.5 part of styrax
5 parts of delustring silicon powder
28 parts of rutile type titanium white
0.8 part of micronized Teflon wax
0.2 part of carbon black
0.5 part of ultramarine
0.5 part of iron oxide red.
The preparation method of powdery paints：
（1）Above-mentioned raw materials input compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, obtain mixing premix material.
（2）Raw material after premixing are carried out into melting mixing with double screw extruder dispersed and extrude, wherein, squeeze
The temperature in the areas of Chu Ji I is 100-110 DEG C, and the temperature in IIth area is 100-110 DEG C.
（3）The material that will be obtained through tabletting machine, cooling, it is broken, crushed through Special grinder for disintegrating after and screening it is average
Particle diameter D50 is 25 μm ~ 30 μm, is then packed.
Embodiment 3
40-50mgKOH/g, viscosity is 3000 ~ 5000（ICI, mPa.s/200 DEG C）75 parts of terminal carboxyl polyester resin
5.5 parts of beta-hydroxy alkylamide
1.2 parts of esters of acrylic acid levelling agent PV-88
0.5 part of styrax
10 parts of delustring silicon powder
10 parts of delustring barium sulfate
5 parts of rutile type titanium white
0.8 part of micronized polyethylene wax
0.8 part of carbon black
2 parts of phthalocyanine blue
0.4 part of iron oxide red.
The preparation method of powdery paints：
（1）Above-mentioned raw materials input compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, obtain mixing premix material.
（2）Raw material after premixing are carried out into melting mixing with double screw extruder dispersed and extrude, wherein, squeeze
The temperature in the areas of Chu Ji I is 100-110 DEG C, and the temperature in IIth area is 110-120 DEG C.
（3）The material that will be obtained through tabletting machine, cooling, it is broken, crushed through Special grinder for disintegrating after and screening it is average
Particle diameter D50 is 28 μm ~ 33 μm, is then packed.
Embodiment 4
45-50mgKOH/g, viscosity is 3000 ~ 4000（ICI, mPa.s/200 DEG C）80 parts of terminal carboxyl polyester resin
6 parts of beta-hydroxy alkylamide
1.5 parts of esters of acrylic acid levelling agent
0.7 part of styrax
30 parts of delustring silicon powder
1 part of rutile type titanium white
0.8 part of micronizing modified Teflon wax
0.5 part of carbon black
Green 0.5 part of Ciba Tai Celadon
2 parts of iron oxide yellow.
The preparation method of powdery paints：
（1）Above-mentioned raw materials input compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, obtain mixing premix material.
（2）Raw material after premixing are carried out into melting mixing with double screw extruder dispersed and extrude, wherein, squeeze
The temperature in the areas of Chu Ji I is 100-120 DEG C, and the temperature in IIth area is 100-120 DEG C.
（3）The material that will be obtained through tabletting machine, cooling, it is broken, crushed through Special grinder for disintegrating after and screening it is average
Particle diameter D50 is 25 μm ~ 35 μm, is then packed.
The following is embodiment 1-4 following the performance test results are obtained in the solidification of curstomer's site near-infrared：
Claims (8)
1. a kind of high speed infrared solidification levelling powdery paints, it is characterized in that, including following weight component：
55 ~ 80 parts of polyester resin
4 ~ 8 parts of curing agent
0.8 ~ 2 part of levelling agent
0.5 ~ 2 part of styrax
5 ~ 35 parts of inorganic filler
Wax powder 0-2 parts
0 ~ 30 part of pigment.
2. high speed infrared according to claim 1 solidifies levelling powdery paints, it is characterized in that, described polyester resin is end
Carboxyl polyester resin, acid number is 40-50mgKOH/g, and viscosity is the terminal carboxyl polyester resin of 3000 ~ 5000mPa s/200 DEG C.
3. high speed infrared according to claim 1 solidifies levelling powdery paints, it is characterized in that, the curing agent is β-hydroxyl alkane
Base acid amides.
4. high speed infrared according to claim 1 solidifies levelling powdery paints, it is characterized in that, the levelling agent is acrylic acid
Esters polymer.
5. high speed infrared according to claim 1 solidifies levelling powdery paints, it is characterized in that, described wax powder includes micro mist
Change one or more the combination in modified polyethylene wax, polypropylene wax powder and polytetrafluoroethylwax wax.
6. high speed infrared according to claim 1 solidifies levelling powdery paints, it is characterized in that, the inorganic filler includes disappearing
One or more kinds of combinations in light barium sulfate, delustring silicon powder and delustring mica powder.
7. high speed infrared described in any one of claim 1-6 solidifies the preparation method of levelling powdery paints, it is characterized in that, including with
Lower step：
（1）Each group is weighed by proportioning to be placed in compounding jar, be sufficiently mixed and crush；
（2）Material after broken is extruded in respectively enteing double screw extruder, and then compressing tablet and cooling down is crushed；
（3）Sheet stock after will be broken is placed in Special grinder for disintegrating to be crushed, then rotated sieve screening packing.
8. high speed infrared solidifies levelling powdery paints according to claim 7, it is characterized in that, the step（2）Middle twin-screw
Extrusion temperature in extruder is 100 DEG C ~ 120 DEG C；The step（3）In size-reduced machine crush after and screening average grain diameter
D50 is 25 μm ~ 35 μm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108178969A (en) * | 2017-12-01 | 2018-06-19 | 成都信达高分子材料有限公司 | A kind of high durable β hydroxyalkyl amides curing type powdery paints |
| CN108559368A (en) * | 2018-04-27 | 2018-09-21 | 江门市力昌新材料有限公司 | A kind of powdery paints and preparation method thereof having purification air performance |
| CN109971318A (en) * | 2019-03-20 | 2019-07-05 | 广州擎天材料科技有限公司 | A kind of household electrical appliances coiled material powdery paints and preparation method thereof |
| CN112341912A (en) * | 2020-10-20 | 2021-02-09 | 擎天材料科技有限公司 | Powder coating and preparation method and application thereof |
| CN113372802A (en) * | 2020-02-25 | 2021-09-10 | 廊坊市亚龙三惠科技股份有限公司 | PU metal powder coating and preparation method thereof |
| CN115746678A (en) * | 2022-11-04 | 2023-03-07 | 擎天材料科技有限公司 | Powder coating for coiled aluminum plate and preparation method thereof |
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| CN105273581A (en) * | 2015-11-06 | 2016-01-27 | 广州擎天材料科技有限公司 | High-infrared rapid-curing powder paint for coil steel and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108178969A (en) * | 2017-12-01 | 2018-06-19 | 成都信达高分子材料有限公司 | A kind of high durable β hydroxyalkyl amides curing type powdery paints |
| CN108559368A (en) * | 2018-04-27 | 2018-09-21 | 江门市力昌新材料有限公司 | A kind of powdery paints and preparation method thereof having purification air performance |
| CN109971318A (en) * | 2019-03-20 | 2019-07-05 | 广州擎天材料科技有限公司 | A kind of household electrical appliances coiled material powdery paints and preparation method thereof |
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| CN113372802A (en) * | 2020-02-25 | 2021-09-10 | 廊坊市亚龙三惠科技股份有限公司 | PU metal powder coating and preparation method thereof |
| CN112341912A (en) * | 2020-10-20 | 2021-02-09 | 擎天材料科技有限公司 | Powder coating and preparation method and application thereof |
| CN112341912B (en) * | 2020-10-20 | 2022-06-28 | 擎天材料科技有限公司 | Powder coating and preparation method and application thereof |
| CN115746678A (en) * | 2022-11-04 | 2023-03-07 | 擎天材料科技有限公司 | Powder coating for coiled aluminum plate and preparation method thereof |
| CN115746678B (en) * | 2022-11-04 | 2024-03-26 | 擎天材料科技有限公司 | Powder coating for coiled material aluminum plate and preparation method thereof |
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| CN106752756B (en) | 2019-07-23 |
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