CN106752756B - 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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- CN106752756B CN106752756B CN201610993976.2A CN201610993976A CN106752756B CN 106752756 B CN106752756 B CN 106752756B CN 201610993976 A CN201610993976 A CN 201610993976A CN 106752756 B CN106752756 B CN 106752756B
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- powdery paints
- high speed
- levelling
- polyester resin
- speed infrared
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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
Abstract
The invention discloses a kind of high speed infrared solidification levelling powdery paints and preparation method thereof, and the component of the powdery paints includes polyester resin, curing agent, levelling agent, styrax, inorganic filler, wax powder and pigment.The solvent resistance of powdery paints provided by the invention is excellent, scratch-resistant performance is strong, bend-resistance performance and weather resistance are excellent, and has realized fast spraying and the adaptable purpose of near-infrared rapid curing for the first time 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 to solidify levelling powder
Last coating and preparation method thereof.
Background technique
With the fast development of industries such as China's building, household electrical appliances, communications and transportation nearly ten years, on demand to coil is quick
It rises, coil uses coating as a part and parcel of manufacture coil, also fast-developing therewith.Currently, almost all of pre-
Applying coiled material colored steel is all to carry out coating using oil-based liquid coating.But have since oil-based liquid coating not only contains to environment
Harmful organic solvent (VOC) etc., general Coil Coating Products and also need to by two apply two dry, consume a large amount of energy.Coating industry is every
Pollution of the waste water, sludge, exhaust gas, waste residue of year discharge to environment, the organic matter of volatilization not only cause damages to the body of worker,
Domestic Environment pollution is further aggravated, huge to human body and environmental hazard, Coil Coating Products oil paint has caused country related
The highest attention of department and 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, thickness is at 50-80 μm.And environment-friendly water-based paint can not
High speed roller coating 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 coating is carried out, and the film after coating is quickly solidified, and the length of paint line is not too long；Together
When again can quick colour changing, and guarantee the colored steel cost after coating and maturation liquid coating it is competitive, be one huge
Challenge.
In general, conventional pure polyester powdery paints generally 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.
Outdoors in pure polyester system, there are polyester/HAA system and polyester/TGIC system, because one more than HAA ratio TGIC
A active function groups so HAA system reaction speed is better than TGIC system, while can choose the terminal carboxyl polyester tree of high acid value
Rouge, but traditional hot Baking out mode is that conduction of the heat outside film internally is leaned on to solidify, and curing efficiency is very slow
Slowly, it is not able to satisfy quick-setting demand.Near-infrared be solidify by the highdensity entire film of luminous energy fast strikethrough, so
Powdery paints rapid curing is set to become possibility by the polyester/HAA system and infrared curing of high acid value.But it is traditional poly-
Ester resin/HAA system can not be fully cured when infrared heating is in time 25-30s, and the impact of coating, hardness, MEK are not
It is able to satisfy the requirement of Coil Coating Products.
Summary 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 the adaptable purpose of fast spraying and near-infrared rapid curing is realized for the first time at home.
The preparation method for solidifying levelling powdery paints the second object of the present invention is to provide above-mentioned high speed infrared.
An object of the present invention is realized by following technical measures: a kind of high speed infrared solidification levelling powder painting
Material, the component including following weight:
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
0-2 parts of wax powder
0 ~ 30 part of pigment
Polyester resin of the present invention be terminal carboxyl polyester resin, acid value 40-50mgKOH/g, viscosity be 3000 ~
S/200 DEG C of 5000(ICI, mPa) terminal carboxyl polyester resin.The polyester resin passes through esterification, polycondensation by polyalcohol and polyacid
Reaction synthesis is added polyalcohol, dihydric alcohol, fatty acid, aromatic acid, Titanium series catalyst, fluorination light in the polymerization stage of resin and draws
Hair agent adds and thermal initiator similar in half-life period, then cooling broken packing as reaction is completed.
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 one be micronized in modified polyethylene wax, polypropylene wax powder and polytetrafluoroethylwax wax
Kind or two or more combinations.
The required inorganic filler of the present invention include one of delustring barium sulfate, delustring silicon powder and delustring mica powder or
Several combinations, changing its parts by weight can change the viscosity and mobile performance of entire 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 solidification levelling powdery paints
Preparation method, comprising the following steps:
(1) each group is weighed according to the ratio to be placed in compounding jar, is sufficiently mixed and is crushed；
(2) broken material, which respectively enters in double screw extruder, squeezes out, and then tabletting is simultaneously cooling broken；
(3) broken sheet stock is placed in Special grinder for disintegrating and is crushed, then sieved and be packaged through rotary screen.
Extrusion temperature in the step (2) in double screw extruder is 100 DEG C ~ 120 DEG C；Through powder in the step (3)
After broken machine crushes and the average grain diameter D50 of screening is 25 μm ~ 35 μm.
The present invention has the advantage that compared with existing solvent technology, existing powdery paints
(1) present invention in resin synthesis process by joined side chain cleavage type photoinitiator and joined half-life period
Thermal initiator close with fast curing times has obtained a kind of quick-setting HAA system high acid value terminal carboxyl polyester resin, real
Show the purpose by near infrared radiation rapid curing heating (25s-30s) heating, substitutes traditional long-time (10-
15min) heat baking.Meanwhile coiled material powdery paints curing agent, promotor, the filler, face of preferably domestic and international raw material supplier
Other auxiliary agents such as material, and proportioning test is optimized from the resin of synthesis, after obtained powdery paints near-infrared heated baking
Coating layer thickness solves rapid curing and coating basic performance, salt spray resistance, resistance to MEK on formula and coating performance at 20-40 μm
Adaptable spraying requirement, and meet the requirement of scumbling appearance.Relative to traditional oil paint, not only coating hardness is more
Height, T is curved and MEK performance is more excellent, and VOC free discharges, environmental-friendly, and a near-infrared baking molding is (traditional
Oil paint needs priming paint to add finishing coat, twice roller coating, toasts twice, while also needing to handle the exhaust gas generated after reaction), it saves
Mass energy, can gradually substitute the use in Coil Coating Products of conventional oil-based liquid coating.
(2) present invention is from the basic components of powdery paints, organic solvent-free, and simple production process is once baked into
Type, VOC free discharge, have many advantages, such as it is environmental-friendly, it is energy saving, it is free from environmental pollution the advantages that.
(3) suitable side is added as curing agent, while during resins synthesis using beta-hydroxy alkylamide by the present invention
Thermal initiator similar in chain crack type photoinitiator, half-life period and curing time accelerates reaction to reduce it by solidification temperature, shortens
Curing time, the crosslink density of coating, while the acid-alkali-corrosive-resisting of coating are improved, water boiling resistance performance and MEK performance 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-
The adaptable problem produced 30s) and quickly, it is not only domestic to reach quick spray of the powdery paints under 60m/min linear speed for the first time
Technique is applied, and realizes the features such as hiding rare is good, and flow leveling is good under powdery paints scumbling (20um-40um) state.
Specific embodiment
A part of specific example is set forth below, and the present invention will be described, it is necessary to which indicated herein is to implement in detail below
Example is served only for that the invention will be further described, does not represent limiting the scope of the invention.Other people do according to the present invention
Some nonessential modifications and adjustment out still fall within protection scope of the present invention.
Embodiment 1
40-45mgKOH/g, viscosity be 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 investment compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, and obtains mixing premix material；
(2) that the raw material after premixing are carried out melting mixing with double screw extruder is evenly dispersed and squeeze out, wherein squeezes
The temperature in Ith area Chu Ji is 100-110 DEG C, and the temperature in IIth area is 110-120 DEG C；
(3) by obtained material through tabletting machine, cooling, it is broken, after pulverizer crushes and the average grain diameter sieved
D50 is 30 μm ~ 35 μm, is then packaged.
Embodiment 2
45-50mgKOH/g, viscosity be 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 investment compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, and obtains mixing premix material.
(2) that the raw material after premixing are carried out melting mixing with double screw extruder is evenly dispersed and squeeze out, wherein squeezes
The temperature in Ith area Chu Ji is 100-110 DEG C, and the temperature in IIth area is 100-110 DEG C.
(3) by obtained material through tabletting machine, cooling, it is broken, after Special grinder for disintegrating crushes and that sieves is averaged
Partial size D50 is 25 μm ~ 30 μm, is then packaged.
Embodiment 3
40-50mgKOH/g, viscosity be 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 investment compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, and obtains mixing premix material.
(2) that the raw material after premixing are carried out melting mixing with double screw extruder is evenly dispersed and squeeze out, wherein squeezes
The temperature in Ith area Chu Ji is 100-110 DEG C, and the temperature in IIth area is 110-120 DEG C.
(3) by obtained material through tabletting machine, cooling, it is broken, after Special grinder for disintegrating crushes and that sieves is averaged
Partial size D50 is 28 μm ~ 33 μm, is then packaged.
Embodiment 4
45-50mgKOH/g, viscosity be 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 modified Teflon wax of micronization
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 investment compounding jar is accurately weighed in proportion, is sufficiently mixed and is crushed, and obtains mixing premix material.
(2) that the raw material after premixing are carried out melting mixing with double screw extruder is evenly dispersed and squeeze out, wherein squeezes
The temperature in Ith area Chu Ji is 100-120 DEG C, and the temperature in IIth area is 100-120 DEG C.
(3) by obtained material through tabletting machine, cooling, it is broken, after Special grinder for disintegrating crushes and that sieves is averaged
Partial size D50 is 25 μm ~ 35 μm, is then packaged.
It is that embodiment 1-4 solidifies to obtain following the performance test results in curstomer's site near-infrared below:
Claims (6)
1. a kind of high speed infrared solidifies levelling powdery paints, characterized in that the component including following weight:
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
0~2 part of wax powder
0~30 part of pigment；
Wherein, the polyester resin is terminal carboxyl polyester resin, and acid value is 40-50 mgKOH/g, and viscosity is 3000~5000
MPa.s/200 DEG C of terminal carboxyl polyester resin, the polyester resin are closed by polyalcohol and polyacid by esterification, polycondensation reaction
At in polymerization stage the addition polyalcohol, dihydric alcohol, fatty acid, aromatic acid, Titanium series catalyst, fluorinated photoinitiator of resin, institute
Stating fluorinated photoinitiator is side chain cleavage type photoinitiator, as reaction is completed, adds half-life period and fast curing times phase
Close thermal initiator is prepared, and the curing agent is beta-hydroxy alkylamide.
2. high speed infrared according to claim 1 solidifies levelling powdery paints, characterized in that the levelling agent is acrylic acid
Esters polymer.
3. high speed infrared according to claim 1 solidifies levelling powdery paints, characterized in that the wax powder includes micro mist
Change the combination of one or more of modified polyethylene wax, polypropylene wax powder and polytetrafluoroethylwax wax.
4. high speed infrared according to claim 1 solidifies levelling powdery paints, characterized in that the inorganic filler includes disappearing
One of light barium sulfate, delustring silicon powder and delustring mica powder or two or more combinations.
5. the preparation method that any one of the claim 1-4 high speed infrared solidifies levelling powdery paints, characterized in that including with
Lower step:
(1) each group is weighed according to the ratio to be placed in compounding jar, is sufficiently mixed and is crushed；
(2) broken material, which respectively enters in double screw extruder, squeezes out, and then tabletting is simultaneously cooling broken；
(3) broken sheet stock is placed in Special grinder for disintegrating and is crushed, then sieved and be packaged through rotary screen.
6. high speed infrared solidifies levelling powdery paints according to claim 5, characterized in that twin-screw in the step (2)
Extrusion temperature in extruder is 100 DEG C~120 DEG C；In the step (3) after pulverizer crushes and sieve average grain diameter
D50 is 25 μm~35 μm.
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Families Citing this family (6)
| 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 |
| CN109971318B (en) | 2019-03-20 | 2021-04-13 | 擎天材料科技有限公司 | Powder coating for household electrical appliance coiled material and preparation method 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 |
| 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 |
| 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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| 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 |
| 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 |
| CN105713490A (en) * | 2016-05-09 | 2016-06-29 | 杨培 | Multi-system infrared curable powder coating for MDF |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN105713490A (en) * | 2016-05-09 | 2016-06-29 | 杨培 | Multi-system infrared curable powder coating for MDF |
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