CN109762440A - A kind of low temperature curing type powdery paints and preparation method thereof - Google Patents
A kind of low temperature curing type powdery paints and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of low temperature curing type powdery paints and preparation method thereof, it uses two-component technique, using the materials such as epoxy resin and polyester resin or amino curing agent as component A, and the material dispersions such as curing accelerator are used as to B component into polyester resin, A, B component sample powder is made by processes such as melting extrusion, cooling and broken, the finely divided cyclonic separation of tabletting and screenings, then A, B component powder are recombined according to mass ratio 95/5~80/20 by obtained low temperature curing type powder-product by granulating technique again.The present invention is by two-component technique and granulating technique largely reduces contact of the epoxy resin with curing accelerator again, avoid the case where powder extrusion process generates pre-reaction, the storage stability of powder systems has been significantly increased, and ensure that the appearance and related physical performance of film.
Description
Technical field
The invention belongs to powder coating technology fields, and in particular to a kind of low temperature curing type powdery paints and its preparation side
Method.
Background technique
Thermosetting powder coating kind is numerous, but usually requires to pass through 180~200 DEG C, and the high temperature of 10~20min is for a long time
Solidification, could be crosslinked film forming, powdery paints is caused not have absolute predominance compared with traditional solvent type coating in terms of energy conservation and environmental protection,
And powdery paints is also limited in the coating of other substrates (MDF, plastics, thermo-sensitive material etc.).
There are still some difficult points for low-temperature setting powder technology at present:
(1) it is easy when prepared by powder coating systems since temperature is excessively high and pre-reaction occurs to producing during melting extrusion
Raw rubber particle, it is final to influence appearance of film and decorative effect；
(2) contradiction of low temperature curing type powder high response and poor latency, the storage stability for showing as powder is poor, powder
The storage condition at end is harsh, and general storage temperature was required at 25 DEG C hereinafter, and the Storage period no more than 3 moon.
(3) viscosity is bigger when powdery paints baking temperature is lower, and crosslinking degree is lower, makes it difficult to guarantee that final film
Levelability and physical property etc..
Summary of the invention
It is an object of the invention in view of the deficienciess of the prior art, provide a kind of low temperature curing type powdery paints and its
Preparation method, the coating film performance and storage stability are good.In order to achieve the above object, the present invention adopts the following technical scheme that
It realizes:
Corresponding powder is made according to prescription quality percentage by following A, B component in a kind of low temperature curing type powdery paints,
A, B component powder in mass ratio 95/5~80/20 are mixed again and are made by granulating technique again:
The component A powder includes the raw material of following mass percent:
The B component powder includes the raw material of following mass percent:
The curing agent is polyester resin or amino curing agent, when the curing agent is polyester resin, mass percent
It is 0~40.0%, when the curing agent is amino curing agent, mass percent is 0~5.0%.
Further, the polyester resin includes one of amorphous terminal carboxyl polyester resin, semi-crystalline resins or more
Kind.
Further, the number-average molecular weight of the amorphous terminal carboxyl polyester resin is 5000~10000, glass transition
Temperature is 50 DEG C or more, and acid value is 30~90mgKOH/g, and the number-average molecular weight of the semi-crystalline resins is 3000~6000, glass
Glass transition temperature is 30 DEG C or more, and acid value is 30~60mgKOH/g, hydroxyl value≤5mgKOH/g.
Further, the epoxy resin be may include bisphenol A type epoxy resin, it is phenol aldehyde modified epoxy resin, alicyclic
One of epoxy resin is a variety of.
Further, the wetting aid includes semi-crystalline resins, the semi-crystalline resins number-average molecular weight be 2500~
4500, glass transition temperature is 30 DEG C or more, and acid value is 20~40mgKOH/g, hydroxyl value≤5mgKOH/g.
Further, the amino curing agent is containing can be with the compound of the active hydrogen of epoxy reaction, including double cyanogen
One of amine, subotituted dicyardiamide, two hydrazide kind compound of dicarboxylic acids etc. are a variety of.
Further, the surface modifier contains close inorganic group and organic-philic group simultaneously.
Further, other described auxiliary agents include levelling agent, optical brightener, degasser, antioxidant, scratching resistant, yellowing-resistant
Agent, growth agent, light stabilizer and ultraviolet absorber, antibacterial agent help levelling agent and gloss to improve one of additive or a variety of.
Further, the curing agent promotor is imidazoles or ring amidine heterocyclic compounds.
In addition, a kind of preparation method of low temperature curing type powdery paints, including following operating procedure:
(1) raw material of above-mentioned A, B component formula are pre-mixed by its corresponding mass percent respectively, melt it is crowded
Out, then tabletting cooling is carried out, is finally crushed and be sized to the suitable powder particle of partial size, wherein position grain in component A powder
Diameter is 20~30 μm, and B component powder median is 15~30 μm；
(2) after being pre-mixed A made from the step (1), B component powder according to mass ratio 95/5~80/20, add
Enter into pelletizer, heating, bonding are stirred at 50~80 DEG C and are granulated flow manufacturing particulate matter；
(3) after particulate matter made from the step (2) being carried out coarse crushing, flour mill is recycled to be crushed and sieved
Being divided into median is 30~40 μm of powder particles, obtains the low temperature curing type powder coating product.
Compared with prior art, a kind of low temperature curing type powdery paints and preparation method thereof of the invention mainly has following excellent
Point:
The coating process of low temperature curing type powder coating product of the invention is closer to general powdery paints, still
By formula auxiliary, preparation process and again the techniques such as granulating technique, powder coating systems are not likely to produce gelatinization during the preparation process
Particle, appearance of film and decorative effect are preferable；Excellent storage stability, storage condition is of less demanding, and guarantees that film is preferably flat
Whole property and good physical property；Powder viscosity in low-temperature bake is not high, and still keeps higher crosslinking degree, makes final production
Film levelability and other physical properties it is preferable.Improvement by above-mentioned technology to low-temperature setting powder technology difficult point, from
And expand the application range of powdery paints.
Specific embodiment
Below with reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
The method is conventional method unless otherwise instructed, and the raw material can be gotten from open business unless otherwise instructed.
Embodiment 1
A kind of low temperature curing type powdery paints, including powder is made in component A and B component according to prescription quality percentage respectively
End, then A, B component powder in mass ratio 95/5~80/20 are mixed to prepare low temperature curing type powder by granulating technique again and produced
Product.
The component A powder includes the raw material of following mass percent:
The B component powder includes the raw material of following mass percent:
The curing agent is polyester resin or amino curing agent, when the curing agent is polyester resin, mass percent
It is 0~40.0%, when the curing agent is amino curing agent, mass percent is 0~5.0%.
The preparation of the low temperature curing type powdery paints of the present embodiment is using two-component technique, by epoxy resin and polyester tree
Curing accelerator is dispersed in polyester resin as B component, the technique very great Cheng by rouge or amino curing agent as component A
Contact of the curing accelerator with epoxy resin is avoided to degree, since pre-reaction generates gelatinization particle when reducing melting extrusion, simultaneously
Also the storage stability for improving powder-product, solves two mostly important problems of low-temperature setting powder.In addition, to A/B group
The dosage that curing accelerator can be adjusted is adjusted in part proportion, that is, adjustable epoxy resin and polyester resin or amino are solid
The reactivity of agent efficiently controls required reaction temperature and time.
The polyester resin includes one of amorphous terminal carboxyl polyester resin, semi-crystalline resins etc. or a variety of, wherein
The polyester resin is specially by polybasic carboxylic acid or acid anhydrides such as terephthalic acid (TPA), dioctyl phthalate, phthalic acid, trimellitic acid
One of acid anhydride, pyromellitic dianhydride, adipic acid, azelaic acid, decanedioic acid etc. or a variety of and polyalcohol for example ethylene glycol, propylene glycol,
One of neopentyl glycol, 2- methyl propanediol, 1,6-HD, glycerine, Glycerin etc. or a variety of condensations or addition
Prepared by polymer.
The number-average molecular weight of the amorphous terminal carboxyl polyester resin is 5000~10000, glass transition temperature 50
DEG C or more, acid value is 30~90mgKOH/g, and the number-average molecular weight of the semi-crystalline resins is 3000~6000, glass transition
Temperature is 30 DEG C or more, and acid value is 30~60mgKOH/g, hydroxyl value≤5mgKOH/g.
The epoxy resin be may include bisphenol A type epoxy resin, phenol aldehyde modified epoxy resin, cycloaliphatic epoxy resin etc.
One of or it is a variety of, preferred epoxide equivalent be 600~1000g/eq, softening point be 80~95 DEG C.
The amino curing agent be containing can with the compound of the active hydrogen of epoxy reaction, wherein may include dicyandiamide,
One of subotituted dicyardiamide, two hydrazide kind compound of dicarboxylic acids etc. are a variety of.
The wetting aid includes semi-crystalline resins, and the semi-crystalline resins number-average molecular weight is 2500~4500, glass
Changing transition temperature is 30 DEG C or more, and acid value is 20~40mgKOH/g, hydroxyl value≤5mgKOH/g；At 80 DEG C or more, viscosity is very for it
It is low, can greatly each material of moisturising formulations, material is more uniformly dispersed, while subsequent reconstruction grain skill also can be improved
Art makes the combination degree of two kinds of powder.
The surface modifier contains two kinds of groups of close inorganic group and organic-philic group simultaneously, it may include Organic Chromium complexing
Compound coupling agent, silane coupling agent, titante coupling agent and aluminic acid compound it is one or more, it is preferable to use titanate ester
Coupling agent and silane coupling agent；On the one hand the compatibility, wetability and dispersibility of resin and pigments and fillers can be improved, on the other hand
Powdery paints and substrate adhesive strength can be enhanced, to improve the physical properties such as impact resistance and the adhesive force of film.
Other described auxiliary agents can significantly improve certain performances of powder or coating, wherein may include levelling agent, optical brightener, taking off
Gas agent, such as benzoin, antioxidant, scratching resistant, anti-yellowing agent, growth agent, light stabilizer and ultraviolet absorber, antibacterial agent,
Levelling agent and gloss is helped to improve one of additive or a variety of.
The filler may include one of britesorb such as talcum powder, meta-aluminate such as kaolin, mica powder etc. or more
Kind, usually using mineral sulfates such as barite, carbonate such as calcium carbonate etc..
The curing agent promotor is imidazoles or ring amidine heterocyclic compounds, wherein may include 2-methylimidazole, 2- second
One of base imidazoles 2,4- methylimidazole, ring amidine etc. are a variety of.
In addition, the present embodiment also provides a kind of novel preparation method of low temperature curing type powdery paints, comprising the following steps:
(1) raw material of above-mentioned A, B component formula are pre-mixed by its corresponding mass percent respectively, melt it is crowded
It squeezes out out, then carries out tabletting cooling, the suitable powder particle of partial size is finally crushed and be sized to, wherein in component A powder
Position partial size is 20~30 μm, and B component powder median is 15~30 μm；
(2) after being pre-mixed A made from the step (1), B component powder according to mass ratio 95/5~80/20, add
Enter into pelletizer, the flow manufacturings particulate matter such as heating, bonding and granulation is stirred at 50~80 DEG C；
(3) after particle made from the step (2) being carried out coarse crushing, flour mill is recycled to be crushed and sieved
It is 30~40 μm of powder particles, i.e., above-mentioned low temperature curing type powdery paints for median.
Specifically, step (1) component A and B component powder median are respectively 20~30 μm and 15~30 μm, master
If keeping B component powder fully dispersed into component A powder, and B component powder solidifies component as the promotion of component A powder,
Granularity is smaller also smaller on appearance of film influence.
Specifically, melting extrusion device therefor described in step (1) is double screw extruder, wherein I area's temperature is set as
90~105 DEG C, II area's temperature is set as 85~95 DEG C.
Specifically, step (2) described pelletizer be include feed inlet, discharge port, agitating device, be heated or cooled system and
The equipment of the components such as central control system.
Specifically, granulating technique is that the granulating technique of the invention again used can be by various powders weight again described in step (3)
A kind of powder is made in new combine again, and the granulating technique again is to pass through device external stirring and powder under the conditions of certain temperature
Two component powder are recombined and re-form powder coarse granule, then pass through mill by the collective effect of the auxiliary agents such as system internal wetting agents
Powder machine is crushed and screened to the suitable powder-product of partial size, which both can be combined into uniform powder particle for A/B component powder,
Both avoid due to dispersion is uneven and the crosslinking degree of film is insufficient when leading to baking, and both avoid directly contact and send out
Raw reaction, substantially increases the storage stability of powder-product.
A kind of low temperature curing type powdery paints of the present embodiment belongs to energy saving and environment friendly coating, production and coating process with
General powdery paints is closer to, by formula auxiliary, preparation process and again granulating technique solve powder preparation be easy in
The problems such as pre-reaction and poor powder store stability, and guarantee the preferable planarization of film and good physical property simultaneously.
Embodiment 2
It is prepared according to the following steps low temperature curing type powdery paints sample powder:
(1) following A, B component raw material are pre-mixed respectively by the mass percent:
The component A powder includes the raw material of following mass percent:
The B component powder includes the raw material of following mass percent:
The polyester resin is that phthalic acid, adipic acid and neopentyl glycol, ethylene glycol, glycerine etc. are condensed, described
The number-average molecular weight of polyester resin is 4800~7000, and vitrification point is 68 DEG C, and acid value is 30~38mgKOH/g.
The epoxy resin is bisphenol A type epoxy resin.
The number-average molecular weight of the wetting aid be 3000~4000, glass transition temperature be 40 DEG C, acid value be 28~
32mgKOH/g, hydroxyl value≤5mgKOH/g.
The surface modifier is organic complex compound coupling agent.
The curing accelerator is glyoxaline compound.
The filler is barite.
(2) by A, the B component raw material after premixing, melting mixing extrusion is carried out with double screw extruder respectively, wherein
The temperature in Ith area of extruder is 100~105 DEG C, and II area's temperature of extruder is 90~95 DEG C, wherein Ith area of extruder is molten for extruder
Melt mixing section, IIth area of extruder is extruder feeding section；
(3) by the A of extrusion, B component materials result, cooling, it is broken after, broken material is carried out with ACM mill respectively
It is finely pulverized to powder median be 25~27 μm and 20~23 μm；
(4) it after A obtained above, B component powder are pre-mixed according to mass ratio 95/5, is added in pelletizer,
The flow manufacturings particulate matter such as heating, bonding and granulation is stirred at 50~80 DEG C；
(5) it will recycle during flour mill crushed and be sized to after above-mentioned obtained particle carries out coarse crushing
Position partial size be 35~40 μ m powder particles to get arrive sample powder.
Embodiment 3
It is prepared according to the following steps low temperature curing type powdery paints sample powder:
(1) following A, B component raw material are pre-mixed respectively by the mass percent:
The component A includes the raw material of following mass percent:
The B component includes the raw material of following mass percent:
The polyester resin be equal phthalic acid, azelaic acid and neopentyl glycol, ethylene glycol, 2- methyl propanediol etc. be condensed and
At the number-average molecular weight of the polyester resin is 3300~5800, and vitrification point is 65 DEG C, and acid value is 30~38mgKOH/g.
The epoxy resin is phenol aldehyde modified epoxy resin.
The number-average molecular weight of the wetting aid be 3200~3600, glass transition temperature be 38 DEG C, acid value be 20~
25mgKOH/g。
The surface modifier is titante coupling agent.
The curing accelerator is ring amidine heterocyclic compounds.
The filler is barite and kaolin.
(2) by A, the B component raw material after premixing, melting mixing extrusion is carried out with double screw extruder respectively, wherein
The temperature in Ith area of extruder is 100~105 DEG C, and II area's temperature of extruder is 90~95 DEG C, wherein Ith area of extruder is molten for extruder
Melt mixing section, IIth area of extruder is extruder feeding section；
(3) by the A of extrusion, B component materials result, cooling, it is broken after, broken material is carried out with ACM mill respectively
It is finely pulverized to powder median be 25~27 μm and 20~23 μm；
(4) it after A obtained above, B component powder are pre-mixed according to mass ratio 85/15, is added in pelletizer,
The flow manufacturings particulate matter such as heating, bonding and granulation is stirred at 50~80 DEG C；
(5) it will recycle during flour mill crushed and be sized to after above-mentioned obtained particle carries out coarse crushing
Position partial size be 30~35 μ m powder particles to get arrive sample powder.
Embodiment 4
Following step prepares low temperature curing type powdery paints sample powder:
(1) following A, B component raw material are pre-mixed respectively by the mass percent；
The component A includes the raw material of following mass percent:
The B component includes the raw material of following mass percent:
The epoxy resin is bisphenol A type epoxy resin.
The polyester resin is that adipic acid and neopentyl glycol, ethylene glycol, 2- methyl propanediol etc. are condensed, the polyester
The number-average molecular weight of resin is 3200~5300, and vitrification point is 58 DEG C, and acid value is 33~38mgKOH/g.
The amino curing agent is subotituted dicyardiamide.
The number-average molecular weight of the wetting aid be 3900~4500, glass transition temperature be 53 DEG C, acid value be 26~
33mgKOH/g, hydroxyl value are≤5mgKOH/g.
The surface modifier is titante coupling agent.
The curing accelerator is 2-methylimidazole.
The filler is calcium carbonate and mica powder.
(2) by A, the B component raw material after premixing, melting mixing extrusion is carried out with double screw extruder respectively, wherein
The temperature in Ith area of extruder is 100~105 DEG C, and II area's temperature of extruder is 90~95 DEG C, wherein Ith area of extruder is molten for extruder
Melt mixing section, IIth area of extruder is extruder feeding section.
(3) by the A of extrusion, B component materials result, cooling, it is broken after, broken material is carried out with ACM mill respectively
It is finely pulverized to powder median be 28~30 μm and 22~25 μm.
(4) it after A obtained above, B component powder are pre-mixed according to mass ratio 95/5, is added in pelletizer,
The flow manufacturings particulate matter such as heating, bonding and granulation is stirred at 50~80 DEG C；
(5) it will recycle during flour mill crushed and be sized to after above-mentioned obtained particle carries out coarse crushing
Position partial size be 35~40 μ m powder particles to get arrive sample powder.
Embodiment 5
Following step prepares low temperature curing type powdery paints sample powder:
(1) following A, B component raw material are pre-mixed respectively by the mass percent；
The component A includes the raw material of following mass percent:
The B component includes the raw material of following mass percent:
The epoxy resin is cycloaliphatic epoxy resin.
The polyester resin is that adipic acid, azelaic acid and neopentyl glycol, ethylene glycol, 2- methyl propanediol etc. are condensed,
The number-average molecular weight of the polyester resin is 3700~6000, and vitrification point is 65 DEG C, and acid value is 33~38mgKOH/g.
The amino curing agent is two hydrazides of sebacic acid.
The number-average molecular weight of the wetting aid be 3700~4500, glass transition temperature be 42 DEG C, acid value be 29~
33mgKOH/g, hydroxyl value≤5mgKOH/g.
The surface modifier is silane coupling agent.
The curing accelerator is ring amidine heterocyclic compounds.
The filler is barite and mica powder.
(2) by A, the B component raw material after premixing, melting mixing extrusion is carried out with double screw extruder respectively, wherein
The temperature in Ith area of extruder is 100~105 DEG C, and II area's temperature of extruder is 90~95 DEG C, wherein Ith area of extruder is molten for extruder
Melt mixing section, IIth area of extruder is extruder feeding section；
(3) by the A of extrusion, B component materials result, cooling, it is broken after, broken material is carried out with ACM mill respectively
It is finely pulverized to powder median be 20~25 μm and 18~20 μm；
(4) it after A obtained above, B component powder are pre-mixed according to mass ratio 80/20, is added in pelletizer,
The flow manufacturings particulate matter such as heating, bonding and granulation is stirred at 50~80 DEG C；
(5) it will recycle during flour mill crushed and be sized to after above-mentioned obtained particle carries out coarse crushing
Position partial size be 30~35 μ m powder particles to get arrive sample powder.
Comparative example 1
Following step prepares low temperature curing type powdery paints sample powder:
(1) following raw material are pre-mixed by the mass percent；
(2) raw material after premixing are subjected to melting mixing extrusion with double screw extruder, wherein Ith area of extruder
Temperature is 100~105 DEG C, and II area's temperature of extruder is 90~95 DEG C, wherein Ith area of extruder is extruder melting mixing section, institute
Stating IIth area of extruder is extruder feeding section.
(3) after the materials result of extrusion, cooling, being crushed, broken material is carried out with ACM mill finely pulverized to powder
Last median is 30~35 μm to get sample powder.
Comparative example 2
Following step prepares low temperature curing type powdery paints sample powder:
(1) following raw material are pre-mixed by the mass percent；
(2) raw material after premixing are subjected to melting mixing extrusion with double screw extruder, wherein Ith area of extruder
Temperature is 100~105 DEG C, and II area's temperature of extruder is 90~95 DEG C, wherein Ith area of extruder is extruder melting mixing section, institute
Stating IIth area of extruder is extruder feeding section.
(3) after the materials result of extrusion, cooling, being crushed, broken material is carried out with ACM mill finely pulverized to powder
Last median is 35~40 μm to get sample powder.
By sample powder made from embodiment 2,3,4,5 and comparative example 1,2 respectively by following coating process coatings: using high-pressure electrostatic
Method or fluidized bed process are coated on treated aluminium sheet, and coating layer thickness is 50~70 μm, using at 130 DEG C of hot baking box 10
Minute solidified, obtain film template, respectively by relevant criterion (GB/T5237.4-2017 and GB/T 2178.2-2008) into
Row test carries out relevant performance test to film template, and obtaining result can be as follows:
Found out by table, the storage stability of embodiment 2~5 is substantially better than comparative example 1 and 2, and appearance of coat, impact resistance
Quite Deng other performances and comparative example 1 and 2, and the impact resistance of embodiment 3 and 5, pencil hardness and cup drawing resistance are substantially better than
Comparative example 1 and 2.It can be seen that using epoxy resin and polyester resin or amino curing agent as component A, and curing accelerator is dispersed to
It is used as B component in polyester resin, the storage stability of powder-product can be significantly improved.
In conclusion low temperature curing type powder coating product excellent storage stability of the invention, storage condition is of less demanding,
And guarantee the preferable planarization of film and good physical property simultaneously；Powdery paints viscosity in low-temperature bake is not high, and still
Higher crosslinking degree is kept, keeps the levelability of the film of final production and other physical properties preferable.
It should be noted that embodiment described above for explaining only the invention, is not constituted to of the invention any
Limitation.If not departing from the spirit and scope of the present invention to various changes or modifications of the invention, if these modification and variations
Belong within the scope of claim and equivalent technologies of the invention, then the present invention is also intended to encompass these changes and deformation.
Claims (10)
1. a kind of low temperature curing type powdery paints, which is characterized in that phase is made according to prescription quality percentage by following A, B component
The powder answered, then A, B component powder in mass ratio 95/5~80/20 are mixed and are made by granulating technique again:
The component A powder includes the raw material of following mass percent:
The sum of above-mentioned component mass percent is 100%；
The B component powder includes the raw material of following mass percent:
The sum of above-mentioned component mass percent is 100%.
The curing agent be polyester resin or amino curing agent, when the curing agent be polyester resin when, mass percent be 0~
40%, when the curing agent is amino curing agent, mass percent is 0~5%.
2. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that the polyester resin includes nothing
Shape one of terminal carboxyl polyester resin, semi-crystalline resins or a variety of.
3. a kind of low temperature curing type powdery paints according to claim 2, which is characterized in that the amorphous carboxyl end group is poly-
The number-average molecular weight of ester resin is 5000~10000, and glass transition temperature is 50 DEG C or more, and acid value is 30~90mgKOH/g,
The number-average molecular weight of the semi-crystalline resins be 3000~6000, glass transition temperature be 30 DEG C or more, acid value be 30~
60mgKOH/g, hydroxyl value≤5mgKOH/g.
4. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that the epoxy resin includes double
One of phenol A type epoxy resin, phenol aldehyde modified epoxy resin, cycloaliphatic epoxy resin are a variety of.
5. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that the amino curing agent be containing
Having can be with the compound of the active hydrogen of epoxy reaction, including dicyandiamide, subotituted dicyardiamide, two hydrazide kind compound of dicarboxylic acids etc.
One of or it is a variety of.
6. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that the wetting aid includes half
Crystalline resins, the semi-crystalline resins number-average molecular weight are 2500~4500, and glass transition temperature is 30 DEG C or more, and acid value is
20~40mgKOH/g, hydroxyl value≤5mgKOH/g.
7. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that the surface modifier is simultaneously
Contain close inorganic group and organic-philic group.
8. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that other described auxiliary agents include stream
Flat agent, optical brightener, degasser, antioxidant, scratching resistant, anti-yellowing agent, growth agent, light stabilizer, ultraviolet absorber, antibacterial
Agent helps levelling agent and gloss to improve one of additive or a variety of.
9. a kind of low temperature curing type powdery paints according to claim 1, which is characterized in that the curing agent promotor is
Imidazoles or ring amidine heterocyclic compounds.
10. a kind of a kind of preparation method of low temperature curing type powdery paints described in any item according to claim 1~9, special
Sign is, including following operating procedure:
(1) raw material of above-mentioned A, B component formula are pre-mixed by its corresponding mass percent respectively, melting extrusion,
It is cooling that tabletting is carried out again, is finally crushed and be sized to the suitable powder particle of partial size, wherein component A powder median is
20~30 μm, B component powder median is 15~30 μm；
(2) it after being pre-mixed A made from the step (1), B component powder according to mass ratio 95/5~80/20, is added to
In pelletizer, it is stirred heating, bonding at 50~80 DEG C and is granulated flow manufacturing particulate matter；
(3) after particulate matter made from the step (2) being carried out coarse crushing, flour mill is recycled to be crushed and be sized to
The powder particle that median is 30~40 μm, obtains the low temperature curing type powder coating product.
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| CN111876112A (en) * | 2020-08-05 | 2020-11-03 | 江苏达丽建筑材料有限公司 | Pigment for PVC color film and preparation process thereof |
| CN112300667A (en) * | 2020-12-24 | 2021-02-02 | 艾勒可新材料(佛山)有限公司 | Powder coating and preparation method thereof |
| CN116515360A (en) * | 2023-02-24 | 2023-08-01 | 广东睿智环保科技股份有限公司 | Ultralow-temperature cured powder coating and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070123649A1 (en) * | 2003-02-21 | 2007-05-31 | Nippon Paint (Usa), Inc. | Chlorine free and reduced chlorine content polymer and resin compositions for adhesion to plastics |
| CN101709164A (en) * | 2009-12-16 | 2010-05-19 | 漳州市万安实业有限公司 | Storable low temperature cured powder coating and preparation method thereof |
-
2018
- 2018-12-20 CN CN201811591784.4A patent/CN109762440B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070123649A1 (en) * | 2003-02-21 | 2007-05-31 | Nippon Paint (Usa), Inc. | Chlorine free and reduced chlorine content polymer and resin compositions for adhesion to plastics |
| CN101709164A (en) * | 2009-12-16 | 2010-05-19 | 漳州市万安实业有限公司 | Storable low temperature cured powder coating and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252632A (en) * | 2019-08-14 | 2019-09-20 | 佛山宜可居新材料有限公司 | A kind of inorganic mineral plate and its coating process |
| CN110964409A (en) * | 2019-11-28 | 2020-04-07 | 老虎表面技术新材料（清远）有限公司 | Low-temperature curing bamboo board powder coating and bamboo board coating applied by same |
| CN111876112A (en) * | 2020-08-05 | 2020-11-03 | 江苏达丽建筑材料有限公司 | Pigment for PVC color film and preparation process thereof |
| CN112300667A (en) * | 2020-12-24 | 2021-02-02 | 艾勒可新材料(佛山)有限公司 | Powder coating and preparation method thereof |
| CN116515360A (en) * | 2023-02-24 | 2023-08-01 | 广东睿智环保科技股份有限公司 | Ultralow-temperature cured powder coating and preparation method thereof |
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| CN109762440B (en) | 2020-10-16 |
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