CN109988489A - Powdery paints and its preparation method and application - Google Patents
Powdery paints and its preparation method and application Download PDFInfo
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- CN109988489A CN109988489A CN201910302058.4A CN201910302058A CN109988489A CN 109988489 A CN109988489 A CN 109988489A CN 201910302058 A CN201910302058 A CN 201910302058A CN 109988489 A CN109988489 A CN 109988489A
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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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- 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
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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Abstract
The present invention relates to a kind of powdery paints and its preparation method and application.According to the mass fraction, the raw material for preparing powdery paints includes: 50 parts~60 parts of polyester resin, 3 parts~7 parts of HAA curing agent, 30.1 parts~50.1 parts of pigments and fillers and auxiliary agent, wherein, the acid value of polyester resin is 29mg KOH/g~35mg KOH/g, and auxiliary agent includes: 0.2 part~1.0 parts of levelling agent, 0.1 part~0.8 part of styrax, 0.1 part~0.8 part of defoaming agent and 1.1 parts~2.3 parts of fumed silica.When in use, obtained coating is still not in shrinkage cavity, pin-hole phenomena when thicker to above-mentioned powdery paints, and neutral salt spray reaches 1000h or more, and corrosion resistance is good.
Description
Technical field
The present invention relates to paint fields, more particularly to a kind of powdery paints and its preparation method and application.
Background technique
The advantages that powdery paints is due to its non-volatility organic matter (VOCs) volatilization, simple process, suitable price, gradually takes
For solvent type anticorrosive paint, it is widely used in the Treatment of Metal Surface such as outdoor filter, highway barrier and lamppost.
There are mainly two types of outdoor polyesters powdery paints, is TGIC (isocyanic acid three-glycidyl ester) curing type powder respectively
Last coating and HAA (hydroxyalkyl amide) curing type powdery paints.Three epoxy groups of TGIC curing agent have very high activity, hand over
It is high to join density, makes coating that there is good weatherability, heat resistance and hardness.But skin, eyes spinosity of the TGIC curing agent to people
Swash property and anaphylaxis, and make zooblast mutagenesis, used by American-European many country's limitations and sticks toxic label.HAA curing agent
It is the best substitute of TGIC curing agent, it has non-toxic, nonirritant, stable storing, curing rate fast and solidification temperature
The features such as low, but the powdery paints that HAA curing agent is prepared, when for coating, the corrosion resistance of coating is poor, thus shadow
Ring the promotion and application of HAA curing type powdery paints.
Summary of the invention
Based on this, it is necessary to provide a kind of powdery paints of the good corrosion resistance of coating enabled to.
In addition, also providing a kind of preparation method and application of powdery paints.
A kind of powdery paints, according to the mass fraction, the raw material for preparing the powdery paints includes: polyester resin 50 parts~60
Part, 3 parts~7 parts of HAA curing agent, 30.1 parts~50.1 parts of pigments and fillers and auxiliary agent, wherein the acid value of the polyester resin is 29mg
KOH/g~35mg KOH/g, the auxiliary agent include: 0.2 part~1.0 parts of levelling agent, 0.1 part of styrax~0.8 part, defoaming agent
0.1 part~0.8 part and 1.1 parts~2.3 parts of fumed silica.
The softening point of the polyester resin is 100 DEG C~110 DEG C in one of the embodiments, and the polyester resin exists
Viscosity at 200 DEG C is 4500mPa.s~5500mPa.s.
The HAA curing agent is N, N, N ', N '-four (β-hydroxypropyl) adipamide, and institute in one of the embodiments,
The hydroxyl equivalent for stating HAA curing agent is 90g/eq~100g/eq.
The pigments and fillers include pigment and filler, according to the mass fraction, the pigment packet in one of the embodiments,
Include: 10 parts~16 parts of titanium dioxide, the filler includes: 12 parts~20 parts of barium sulfate and 8 parts~14 parts of silica flour.
The levelling agent is acrylate copolymer in one of the embodiments, acrylate in the levelling agent
Mass content is 60%~68%.
The defoaming agent is organosilicon in one of the embodiments,.
The auxiliary agent further includes at least one of sludge ice agent and 2-methylimidazole in one of the embodiments,.
A kind of preparation method of powdery paints, comprising the following steps:
Weigh by following mass fraction and prepare raw material: 50 parts~60 parts of polyester resin, 3 parts~7 parts of HAA curing agent, face are filled out
Expect that 30.1 parts~50.1 parts and auxiliary agent, the acid value of the polyester resin are 29mg KOH/g~35mg KOH/g, the auxiliary agent packet
It includes: 0.2 part~1.0 parts of levelling agent, 0.1 part~0.8 part of styrax, 0.1 part~0.8 part of defoaming agent and fumed silica 1.1
Part~2.3 parts；And
The polyester resin, the HAA curing agent, the pigments and fillers and the auxiliary agent are mixed, powdery paints is obtained.
It is described by the polyester resin, the HAA curing agent, pigments and fillers and described in one of the embodiments,
Auxiliary agent mix the step of include:
By the polyester resin, the HAA curing agent, the pigments and fillers, the levelling agent, the defoaming agent, the peace
Breath is fragrant and the part fumed silica is pre-mixed, and obtains pre-composition；
The pre-composition is subjected to melting extrusion, and tabletting, broken, obtains fragment；And
The fragment is mixed with the remaining fumed silica, carries out classification grinding, re-sieving obtains powder painting
Material.
Above-mentioned powdery paints or the powdery paints being prepared by the preparation method of above-mentioned powdery paints are outdoor anti-in preparation
Application in rotten coating.
Levelling agent, defoaming agent, styrax and fumed silica are used cooperatively in above-mentioned powdery paints, so that powdery paints
In prepares coating, the surface tension of coating can reduce, coating is made pin hole do not occur, while improving the corrosion resistance of coating
Energy.And specific polyester resin is combined, and when so that powdery paints being used for coating, the corrosion resistance and good of coating.On it is demonstrated experimentally that
State powdery paints when in use, coating layer thickness is still not in pin-hole phenomena at 100 μm~180 μm, and neutral salt spray can be with
Reach 1500h, corrosion resistance is good.
Detailed description of the invention
Fig. 1 is the process flow chart of the preparation method of the powdery paints of an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, below in conjunction with specific embodiment to invention is more fully described.Tool
Preferred embodiment of the invention is given in body embodiment.But the invention can be realized in many different forms,
It is not limited to the examples described herein.On the contrary, purpose of providing these embodiments is makes to the disclosure
Understanding it is more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
Body embodiment purpose, it is not intended that in limitation the present invention.
The powdery paints of one embodiment, according to the mass fraction, the raw material for preparing powdery paints includes: 50 parts of polyester resin
~60 parts, 3 parts~7 parts of HAA curing agent, 30.1 parts~50.1 parts of pigments and fillers and auxiliary agent.Wherein, the acid value of polyester resin is 29mg
KOH/g~35mg KOH/g.Auxiliary agent include 0.2 part~1.0 parts of levelling agent, 0.1 part~0.8 part of styrax, 0.1 part of defoaming agent~
0.8 part and 1.1 parts~2.3 parts of fumed silica.
Further, the softening point of polyester resin is 100 DEG C~110 DEG C.The viscosity of polyester resin be 4500mpa.s~
5500mpa.s(200℃).Select above-mentioned polyester resin that the corrosion resistance for the powdery paints being prepared and weatherability can be made to mention
It is high.
HAA curing agent is N, N, N ', N '-four (β-hydroxypropyl) adipamide.The hydroxyl equivalent of HAA curing agent is 90g/eq
~100g/eq.Using the effect of the HAA curing agent of above-mentioned hydroxyl equivalent: it is larger with the crosslink density after curable polyester resin, it applies
The physical and mechanical property of film is good.
Specifically, pigments and fillers include pigment and filler.Wherein, according to the mass fraction, pigment includes titanium dioxide 10 parts~16
Part.Titanium dioxide can absorb ultraviolet light, to improve the weather resistance of powdery paints.In the present embodiment, pigment further includes
Carbon black, phthalocyanine green and phthalocyanine blue.Specifically, according to the mass fraction, carbon black is 0.06 part, and green phenol cyanines are 0.02 part, and phenol cyanines indigo plant is
0.02 part.It can make the powdery paints being prepared that grey be presented using above-mentioned pigment.It is appreciated that in other embodiments
In, to make other colors of powdery paints, pigment is not limited to above-mentioned pigment.
Filler includes barium sulfate and silica flour.According to the mass fraction, filler includes 12 parts~20 parts of barium sulfate and silica flour 8
Part~14 parts.Wherein, barium sulfate is bloom barium sulfate.Bloom barium sulfate has good dispersed and affine with other media
Power, and have preferable compatibility with all colorants, the levelability and gloss retention of powdery paints can be enhanced, powder painting can be improved
Material reaches optimal coating thickness in spraying process, improves powder utilization, reduces powdery paints dosage.
Silica flour is cell quartz powder.Contain a certain number of hydroxyl-silanols in cell quartz powder surface.As polar functional
Group, for helping to improve the adhesive force and caking property of product in powdery paints.On the other hand, due to the presence of hydroxyl, more hold
Easily by coupling agent surface treatment, increase the effect of its crosslinking, reinforcement, film can be improved in the physical and mechanical property for increasing product again
Tensile strength.Contain ZrO in cell quartz powder2, zirconium dioxide property is stable, and hardness is high, in addition cell quartz powder is porous
Structure makes coating have preferable hardness performance and shock proof performance.Therefore, silica flour energy is added in above-mentioned powdery paints
Enough improve the intensity for the powdery paints being prepared.
Specifically, according to the mass fraction, auxiliary agent includes: 0.2 part~1.0 parts of levelling agent, 0.1 part~0.8 part of styrax, disappears
0.1 part~0.8 part of infusion and 1.1 parts~2.3 parts of fumed silica.Wherein, levelling agent is acrylate copolymer.Levelling agent
The mass content of middle acrylate is 60%~68%.Specifically, levelling agent be selected from De Xinli chemical company PV88, P67 and
One of CP77.Levelling agent is added in powdery paints can reduce the surface of film layer when powdery paints is melted and formed a film
Power makes film layer pin hole do not occur.
Defoaming agent is organosilicon.Specifically, defoaming agent comes the YPZ of this new chemical materials Co., Ltd, Guangdong selected from Hubei
One of the B-586 of federal Fine Chemical Co., Ltd in the F-2572 of Tian Feng defoaming agent Co., Ltd and Guangdong.In powder
The effect of defoaming agent is added in coating: reducing the melting viscosity of powdery paints, while reducing the surface tension of coating, prevent film
Generate particle or fire pit etc..
Benzoic effect is added in powdery paints is: making the air contained in powdery paints, moisture and powdery paints
The volatile substances such as generated small molecule compound escape out when cross-linking and curing reaction, and make small molecule compound of escaping out
Pin hole is made up in time, and film is avoided to generate tiny pin hole or pig pore.
Fumed silica adds as in edge coverage power modifier, and powdery paints is made to generate thixotroping work when melting levelling
With keeping each position coating thickness of coated article uniform, avoid the covering of film corner part uneven.Specifically, according to the mass fraction,
The interior fumed silica added is 1.0 parts~2.0 parts.In addition, fumed silica is also used as loose and anti-caking auxiliary agent
It is added when powdery paints subdivision is broken, powdery paints is made not agglomerate in manufacture, storage, transport and use process, keep it loose
Or it is loose.According to the mass fraction, additional fumed silica is 0.1 part~0.3 part.
By the synergistic effect of levelling agent, defoaming agent, styrax and fumed silica, so that the powder being prepared applies
When the flat solidification of stream, thickness is uniform, edge coverage is good, without shrinkage cavity, it is pin-free the defects of.
In some embodiments, auxiliary agent further includes at least one of sludge ice agent and 2-methylimidazole.Further, by matter
Number meter is measured, sludge ice agent is 0.2 part~0.5 part.2-methylimidazole is 0.1 part~0.3 part.The main ingredient of sludge ice agent is propylene
Acid ester polymer.Sludge ice agent, which is added, reduces the surface tension of partial region when the powdery paints being prepared can be made to use, from
And keep film coated surface tension distribution uneven, form the tangerine line of fluctuating.General die cast metal product surface is relatively rough, there have to be very much
Defect, the powdery paints of tangerine line type can preferably cover the defect of surface of metal product.
2-methylimidazole is added in powdery paints, cooperates the use of sludge ice agent, can enhance when powdery paints uses
Tangerine line solid degree.
Further, auxiliary agent includes levelling agent, defoaming agent, styrax, fumed silica, sludge ice agent and 2- methyl miaow
Azoles.When auxiliary agent includes above-mentioned substance, for obtained powdery paints in prepares coating, coating has good hardness and corrosion-resistant
Property, without shrinkage cavity, it is pin-free and have tangerine line three-dimensional sense.
Above-mentioned powdery paints has at least the following advantages:
(1) above-mentioned powdery paints solves the cured powdery paints of HAA in thickness by the adjustment of formula and the selection of raw material
" pin hole " drawback easily occurred when painting, and the pencil hardness of obtained coating, up to 2H, neutral salt spray test can achieve
1500h has good hardness and corrosion resistance.
(2) above-mentioned powdery paints is generated without toxic, pungent in use, has the feature of environmental protection.
(3) sludge ice agent, 2-methylimidazole cooperate in above-mentioned powdery paints, and the powdery paints made applies when in use
Layer has tangerine line effect, and tangerine line solid degree is high.
(4) add silica flour in above-mentioned powdery paints, the powdery paints made when in use coating have it is good hard
Degree.
Referring to Fig. 1, the preparation method of the powdery paints of an embodiment, comprising the following steps:
Step S110: weigh raw material by following mass fraction: 50 parts~60 parts of polyester resin, 3 parts~7 parts of HAA curing agent,
30.1 parts~50.1 parts of pigments and fillers and auxiliary agent, the acid value of polyester resin are 29mg KOH/g~35mg KOH/g, and auxiliary agent includes: stream
1.1 parts of 0.2 part~1.0 parts of flat agent, 0.1 part~0.8 part of styrax, 0.1 part~0.8 part of defoaming agent and fumed silica~
2.3 part.
Wherein, the softening point of polyester resin is 100 DEG C~110 DEG C.The viscosity of polyester resin be 4500mpa.s~
5500mpa.s(200℃).HAA curing agent is N, N, N ', N '-four (β-hydroxypropyl) adipamide.The hydroxyl of HAA curing agent is worked as
Amount is 90g/eq~100g/eq.
Pigments and fillers include pigment and filler.Specifically, according to the mass fraction, pigment includes 10 parts~16 parts of titanium dioxide.It fills out
Material includes barium sulfate and silica flour.Specifically, according to the mass fraction, barium sulfate is 12 parts~20 parts, and silica flour is 8 parts~14
Part.
Wherein, levelling agent is acrylate copolymer.The mass content of acrylate is 60%~68% in levelling agent.Tool
Body, levelling agent is selected from one of PV88, P67 and CP77 of De Xinli chemical company.
Defoaming agent is organosilicon.Specifically, defoaming agent comes the YPZ of this new chemical materials Co., Ltd, Guangdong selected from Hubei
One of the B-586 of federal Fine Chemical Co., Ltd in the F-2572 of Tian Feng defoaming agent Co., Ltd and Guangdong.
Step S120: polyester resin, HAA curing agent, pigments and fillers and auxiliary agent are mixed, powdery paints is obtained.
Specifically, step S120 includes:
Step S121: by polyester resin, HAA curing agent, pigments and fillers, levelling agent, defoaming agent, styrax and partial gas phase two
Silica is pre-mixed, and pre-composition is obtained.
Partial gas phase silica uses interior add mode as edge coverage power modifier, makes powdery paints in melting levelling
When generate thixotropic transformation, keep each position coating thickness of coated article uniform, avoid the covering of film corner part uneven.Specifically,
According to the mass fraction, partial gas phase silica is 1.0 parts~2.0 parts.
In some embodiments, auxiliary agent further includes at least one of 2-methylimidazole and sludge ice agent.Step S121 premix
During conjunction, further include the steps that mixing with 2-methylimidazole.
Wherein, the time of premixing is 8min~10min.Premixing carries out in premixing machine.
Step S122: carrying out melting extrusion for pre-composition, and tabletting, broken, obtains fragment.
Wherein, double screw extruder is used during mixture being carried out melting extrusion.Specifically, double screw extruder
In 1 area's temperature be 105 DEG C, 2 area's temperature be 110 DEG C.
Step S123: fragment is mixed with remaining fumed silica, carries out classification grinding, re-sieving obtains powder
Coating.
Wherein, classification grinding is carried out using air classification mill ACM.It is sieved in sifting step using rotary screen.
Remaining fumed silica is also used as the addition when powdery paints subdivision is broken of loose and anti-caking auxiliary agent, makes powder
Last coating does not agglomerate in manufacture, storage, transport and use process, keeps it loose or loose.According to the mass fraction, remaining gas phase
Silica is 0.1 part~0.3 part.
Further, in some embodiments, auxiliary agent further includes sludge ice agent.Fragment is subjected to classification grinding re-sieving
After step, before obtaining powdery paints, further include the steps that being mixed with sludge ice agent.
Specifically, the time being mixed with sludge ice agent is 1min~2min.
When auxiliary agent includes sludge ice agent, auxiliary agent further includes 2-methylimidazole, as making for curing accelerator cooperation sludge ice agent
Tangerine line solid degree when with enhancing powdery paints levelling.
The partial size of the powdery paints obtained by above-mentioned preparation method is 50 μm~90 μm.
The preparation method of above-mentioned powdery paints has at least the following advantages:
(1) preparation method of above-mentioned powdery paints is easy to operate, easy to industrialized production.
(2) powdery paints that the preparation method of above-mentioned powdery paints enables to avoids occurring pin hole when thickness applies existing
As, and by powdery paints in use, the hardness of coating is big, corrosion resistance is good, tangerine line solid degree is high.
The powdery paints of one embodiment is preparing the application in outdoor corrosion-inhibiting coating.Above-mentioned powdery paints is outdoor in preparation
By following coating process coatings when corrosion-inhibiting coating: the powder coating and their application above method being prepared with high-pressure electrostatic method in
On treated metal plate, coating layer thickness be 100 μm~180 μm, using 10 minutes~15 minutes at 180 DEG C of hot baking box into
Row solidification, obtains corrosion-inhibiting coating.
The following are specific embodiment parts:
Embodiment 1
The preparation process of the powdery paints of the present embodiment is as follows:
(1) according to the mass fraction, the following raw material is weighed: 50 parts of polyester resin, 3 parts of HAA curing agent, 10 parts of titanium dioxide, sulphur
12 parts of sour barium, 8 parts of silica flour, 0.2 part of levelling agent, 0.1 part of defoaming agent, 0.1 part of styrax, 0.1 part of 2-methylimidazole, gas phase two
1.2 parts of silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.2 part of sludge ice agent.Wherein, polyester resin
Acid value is 29mg KOH/g~35mg KOH/g.Softening point is 100 DEG C.Viscosity is 5000mpa.s (200 DEG C).HAA curing agent
Hydroxyl equivalent is 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is that carry out this new chemical materials limited in Hubei
The YPZ of company.
(2) by 50 parts of polyester resin, 3 parts of HAA curing agent, 10 parts of titanium dioxide, 12 parts of barium sulfate, 8 parts of silica flour, levelling agent
0.2 part, 0.1 part of defoaming agent, 0.1 part of styrax, 0.1 part of 2-methylimidazole, 1.0 parts of fumed silica, 0.06 part of carbon black, phthalein
Green 0.02 part and 0.02 part of phthalocyanine blue of cyanines is pre-mixed, and the time of premixing is 10min, obtains pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.2 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.2 part of sludge ice agent, obtains powdery paints.
Embodiment 2
The preparation process of the powdery paints of the present embodiment is as follows:
(1) according to the mass fraction, the following raw material is weighed: 55 parts of polyester resin, 5 parts of HAA curing agent, 13 parts of titanium dioxide, sulphur
16 parts of sour barium, 11 parts of silica flour, 0.6 part of levelling agent, 0.5 part of defoaming agent, 0.5 part of styrax, 0.2 part of 2-methylimidazole, gas phase
.7 parts of silica 1,0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.3 part of sludge ice agent.Wherein, polyester resin
Acid value be 29mg KOH/g~35mg KOH/g.Softening point is 110 DEG C.Viscosity is 5500mpa.s (200 DEG C).HAA curing agent
Hydroxyl equivalent be 95g/eq.Levelling agent is the P67 of De Xinli chemical company.Defoaming agent is Guangdong Tian Feng defoaming agent Co., Ltd
F-2572.
(2) by 55 parts of polyester resin, 5 parts of HAA curing agent, 13 parts of titanium dioxide, 16 parts of barium sulfate, 11 parts of silica flour, levelling
0.6 part of agent, 0.5 part of defoaming agent, 0.5 part of styrax, 0.2 part of 2-methylimidazole, 1.4 parts of fumed silica, 0.06 part of carbon black,
0.02 part of phthalocyanine green and 0.02 part of phthalocyanine blue are pre-mixed, and the time of premixing is 8min, obtain pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.3 part of sludge ice agent, obtains powdery paints.
Embodiment 3
The preparation process of the powdery paints of the present embodiment is as follows:
(1) according to the mass fraction, the following raw material is weighed: 60 parts of polyester resin, 7 parts of HAA curing agent, 16 parts of titanium dioxide, sulphur
20 parts of sour barium, 14 parts of silica flour, 1.0 parts of levelling agent, 0.8 part of defoaming agent, 0.8 part of styrax, 0.3 part of 2-methylimidazole, gas phase
2.1 parts of silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.5 part of sludge ice agent.Wherein, polyester resin
Acid value be 29mg KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 4500mpa.s (200 DEG C).HAA curing agent
Hydroxyl equivalent be 90g/eq.Levelling agent is the CP77 of De Xinli chemical company.Defoaming agent is there is federal fine chemistry industry in Guangdong
The B-586 of limit company.
(2) by 60 parts of polyester resin, 7 parts of HAA curing agent, 16 parts of titanium dioxide, 20 parts of barium sulfate, 14 parts of silica flour, levelling
1.0 parts of agent, 0.8 part of defoaming agent, 0.8 part of styrax, 0.3 part of 2-methylimidazole, 2.0 parts of fumed silica, 0.06 part of carbon black,
0.02 part of phthalocyanine green and 0.02 part of phthalocyanine blue are pre-mixed, and the time of premixing is 9min, obtain pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.1 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.5 part of sludge ice agent, obtains powdery paints.
Embodiment 4
The preparation process of the powdery paints of the present embodiment is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 10 parts of silica flour, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, gas phase
.8 parts of silica 1,0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, polyester tree
The acid value of rouge is 29mg KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).HAA solidification
The hydroxyl equivalent of agent is 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is federal fine chemistry industry in Guangdong
The B-586 of Co., Ltd.
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 10 parts of silica flour, levelling
0.5 part of agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, 1.5 parts of fumed silica, 0.06 part of carbon black,
0.02 part of phthalocyanine green and 0.02 part of phthalocyanine blue are pre-mixed, and the time of premixing is 10min, obtain pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Embodiment 5
The preparation process of the powdery paints of the present embodiment is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 10 parts of silica flour, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 1.8 parts of fumed silica, charcoal
Black 0.06 part, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue.Wherein, the acid value of polyester resin is 29mg KOH/g~35mg KOH/
g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).The hydroxyl equivalent of HAA curing agent is 100g/eq.Levelling agent is
The PV88 of De Xinli chemical company.Defoaming agent is the B-586 of federal Fine Chemical Co., Ltd in Guangdong.
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 10 parts of silica flour, levelling
0.5 part of agent, 0.5 part of defoaming agent, 0.4 part of styrax, 1.5 parts of fumed silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green and phthalein
Blue 0.02 part of cyanines is pre-mixed, and the time of premixing is 10min, obtains pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains powdery paints.
Comparative example 1
The preparation process of the powdery paints of this comparative example is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, fumed silica 1.8
Part, 0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, the acid value of polyester resin is
29mg KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).The hydroxyl of HAA curing agent is worked as
Amount is 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is federal Fine Chemical Co., Ltd in Guangdong
B-586。
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 0.5 part of levelling agent, defoaming
0.5 part of agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, 1.5 parts of fumed silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green
And 0.02 part of phthalocyanine blue be pre-mixed, the time of premixing is 10min, obtains pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Comparative example 2
The preparation process of the powdery paints of this comparative example is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 5 parts of silica flour, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, gas phase two
1.8 parts of silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, polyester resin
Acid value be 29mg KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).HAA curing agent
Hydroxyl equivalent be 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is there is federal fine chemistry industry in Guangdong
The B-586 of limit company.
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 5 parts of silica flour, levelling agent
0.5 part, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, 1.5 parts of fumed silica, 0.06 part of carbon black, phthalein
Green 0.02 part and 0.02 part of phthalocyanine blue of cyanines is pre-mixed, and the time of premixing is 10min, obtains pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Comparative example 3
The preparation process of the powdery paints of this comparative example is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 20 parts of silica flour, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, gas phase
.8 parts of silica 1,0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, polyester tree
The acid value of rouge is 29mg KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).HAA solidification
The hydroxyl equivalent of agent is 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is federal fine chemistry industry in Guangdong
The B-586 of Co., Ltd.
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 20 parts of silica flour, levelling
0.5 part of agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, 1.5 parts of fumed silica, 0.06 part of carbon black,
0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue be pre-mixed, time of premixing is 10min, obtains pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Comparative example 4
The preparation process of the powdery paints of this comparative example is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 10 parts of silica flour, 0.1 part of levelling agent, 0.05 part of defoaming agent, 0.05 part of styrax, 0.2 part of 2-methylimidazole, gas
1.8 parts of aerosil, 0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, polyester
The acid value of resin is 29mg KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).HAA is solid
The hydroxyl equivalent of agent is 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is federal fining in Guangdong
The B-586 of work Co., Ltd.
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 10 parts of silica flour, levelling
0.1 part of agent, 0.05 part of defoaming agent, 0.05 part of styrax, 0.2 part of 2-methylimidazole, 1.5 parts of fumed silica, carbon black 0.06
Part, 0.02 part of phthalocyanine green and 0.02 part of phthalocyanine blue are pre-mixed, and the time of premixing is 10min, obtain pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Comparative example 5
The preparation process of the powdery paints of this comparative example is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 10 parts of silica flour, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 1.8 parts of fumed silica, charcoal
Black 0.06 part, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, the acid value of polyester resin is 29mg
KOH/g~35mg KOH/g.Softening point is 105 DEG C.Viscosity is 5000mpa.s (200 DEG C).The hydroxyl equivalent of HAA curing agent is
100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is the B- of federal Fine Chemical Co., Ltd in Guangdong
586。
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 10 parts of silica flour, levelling
0.5 part of agent, 0.5 part of defoaming agent, 0.4 part of styrax, 1.5 parts of fumed silica, 0.06 part of carbon black, 0.02 part of phthalocyanine green and phthalein
Blue 0.02 part of cyanines is pre-mixed, and the time of premixing is 10min, obtains pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Comparative example 6
The preparation process of the powdery paints of this comparative example is as follows:
(1) according to the mass fraction, the following raw material is weighed: 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, sulphur
14 parts of sour barium, 10 parts of silica flour, 0.5 part of levelling agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, gas phase
.8 parts of silica 1,0.06 part of carbon black, 0.02 part of phthalocyanine green, 0.02 part of phthalocyanine blue and 0.38 part of sludge ice agent.Wherein, polyester tree
The acid value of rouge is 59mg KOH/g~65mg KOH/g.Softening point is 100 DEG C.Viscosity is 4000mpa.s (200 DEG C).HAA solidification
The hydroxyl equivalent of agent is 100g/eq.Levelling agent is the PV88 of De Xinli chemical company.Defoaming agent is federal fine chemistry industry in Guangdong
The B-586 of Co., Ltd.
(2) by 54 parts of polyester resin, 4 parts of HAA curing agent, 12 parts of titanium dioxide, 14 parts of barium sulfate, 10 parts of silica flour, levelling
0.5 part of agent, 0.5 part of defoaming agent, 0.4 part of styrax, 0.2 part of 2-methylimidazole, 1.5 parts of fumed silica, 0.06 part of carbon black,
0.02 part of phthalocyanine green and 0.02 part of phthalocyanine blue are pre-mixed, and the time of premixing is 10min, obtain pre-composition.
(3) pre-composition is subjected to melting extrusion with double screw extruder, then tabletting, cooling and broken, wherein twin-screw
1 area's temperature of extruder is 105 DEG C, and 2 area's temperature are 110 DEG C, obtains fragment.
(4) fragment is mixed with 0.3 part of fumed silica and is crushed again with air classification grinding machine, cross 140 later
Mesh obtains sieving.
(5) 1min is mixed in sieving and 0.38 part of sludge ice agent, obtains powdery paints.
Powdery paints prepared by 1~embodiment of embodiment 5 and 1~comparative example of comparative example 6 is electrostatically sprayed rifle to be sprayed on
Coating is obtained on surface treated metal plate, wherein condition of cure are as follows: 180 DEG C of solidification temperature, curing time 15min.It applies
The performance parameter of layer is as shown in table 1 below:
Wherein, coating layer thickness test is tested according to GB/T 13452.2-2008 method, and appearance of coat and tangerine line are three-dimensional
The eyesight of normal person, visual sense test are pressed in degree test.Adhesive force is tested according to the method in GB/T 9286-1998, shock resistance
Property test tested according to the method in GB/T 1732-1993, pencil hardness according to the method in ISO 15184: 1998 into
Row test, water resistance test are tested according to the method in GB/T 1733-1993, and neutral salt spray is according to GB/T 1771-
Method in 1991 is tested.
The performance for the coating that table 1 is obtained by the powdery paints of embodiment and comparative example compares
From the data in upper table 1 it can be seen that using 1~embodiment of above-described embodiment 5 prepare powdery paints preparation
Coating has the characteristics that high rigidity, without shrinkage cavity, pin-free, corrosion resistant.Coating hardness can achieve 2H, and neutral salt spray can achieve
1000h or more.
As can be seen that the content of silica flour, which is, influences a key factor of coating hardness, with silica flour from upper table 1
The raising of content can effectively improve coating hardness.2-methylimidazole cooperates the use of sludge ice agent, can effectively adjust tangerine
The three-dimensional degree of line, to improve the dicoration of coating.
And from upper table 1 in the comparison of embodiment 4 and comparative example 4 as can be seen that appropriately add levelling agent, defoaming agent and
Styrax improves the corrosion resistance of coating it is possible to prevente effectively from the surface defects such as shrinkage cavity, pin hole occurs in thick film.
It can be seen that the polyester resin for selecting specific acid value from the comparison of embodiment 4 and comparative example 6, can be improved powder
The corrosion resistance of the coating of coating when in use.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of powdery paints, which is characterized in that according to the mass fraction, the raw material for preparing the powdery paints includes: polyester tree
50 parts~60 parts of rouge, 3 parts~7 parts of HAA curing agent, 30.1 parts~50.1 parts of pigments and fillers and auxiliary agent, wherein the polyester resin
Acid value is 29mg KOH/g~35mg KOH/g, and the auxiliary agent includes: 0.2 part~1.0 parts of levelling agent, styrax 0.1 part~0.8
Part, 0.1 part~0.8 part of defoaming agent and 1.1 parts~2.3 parts of fumed silica.
2. powdery paints according to claim 1, which is characterized in that the softening point of the polyester resin is 100 DEG C~110
DEG C, viscosity of the polyester resin at 200 DEG C is 4500mPa.s~5500mPa.s.
3. powdery paints according to claim 1, which is characterized in that the HAA curing agent is N, N, N ', (β-hydroxyl of N '-four
Propyl) adipamide, and the hydroxyl equivalent of the HAA curing agent is 90g/eq~100g/eq.
4. powdery paints according to claim 1, which is characterized in that the pigments and fillers include pigment and filler, by quality
Number meter, the pigment include: 10 parts~16 parts of titanium dioxide, and the filler includes: 12 parts~20 parts and 8 parts of silica flour of barium sulfate
~14 parts.
5. powdery paints according to claim 1, which is characterized in that the levelling agent is acrylate copolymer, described
The mass content of acrylate is 60%~68% in levelling agent.
6. powdery paints according to claim 1, which is characterized in that the defoaming agent is organosilicon.
7. powdery paints according to claim 1, which is characterized in that the auxiliary agent further includes 2-methylimidazole and sludge ice agent
At least one of.
8. a kind of preparation method of powdery paints, which comprises the following steps:
It is weighed by mass fraction and prepares raw material as follows: 50 parts~60 parts of polyester resin, 3 parts of HAA curing agent~7 parts, pigments and fillers
The acid value of 30.1 parts~50.1 parts and auxiliary agent, the polyester resin is 29mg KOH/g~35mg KOH/g, and the auxiliary agent includes:
1.1 parts of 0.2 part~1.0 parts of levelling agent, 0.1 part~0.8 part of styrax, 0.1 part~0.8 part of defoaming agent and fumed silica~
2.3 part；And
The polyester resin, the HAA curing agent, the pigments and fillers and the auxiliary agent are mixed, powdery paints is obtained.
9. the preparation method of powdery paints according to claim 8, which is characterized in that described by the polyester resin, institute
Stating the step of HAA curing agent, the pigments and fillers and the auxiliary agent mix includes:
By the polyester resin, the HAA curing agent, the pigments and fillers, the levelling agent, the defoaming agent, the styrax
And the part fumed silica is pre-mixed, and pre-composition is obtained；
The pre-composition is subjected to melting extrusion, and tabletting, broken, obtains fragment；
The fragment is mixed with the remaining fumed silica, carries out classification grinding, re-sieving obtains powdery paints.
10. described in any item powdery paints of claim 1~7 or by the described in any item powdery paints of claim 8~9
The powdery paints that preparation method is prepared is preparing the application in outdoor corrosion-inhibiting coating.
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| CN115260818A (en) * | 2022-08-15 | 2022-11-01 | 成都瑞德琅科技有限公司 | Powder fireproof coating and preparation method thereof |
| CN115558384A (en) * | 2022-11-02 | 2023-01-03 | 广东睿智环保科技有限责任公司 | Low-temperature curing high-corner-coverage powder coating and preparation method thereof |
| CN115785775A (en) * | 2022-12-26 | 2023-03-14 | 广东华彩粉末科技有限公司 | High-performance corner protection powder coating and preparation method thereof |
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