CN108948826A - A kind of terminal carboxyl polyester resin and preparation method thereof - Google Patents
A kind of terminal carboxyl polyester resin and preparation method thereof Download PDFInfo
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- CN108948826A CN108948826A CN201810788381.2A CN201810788381A CN108948826A CN 108948826 A CN108948826 A CN 108948826A CN 201810788381 A CN201810788381 A CN 201810788381A CN 108948826 A CN108948826 A CN 108948826A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
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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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
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Abstract
The invention discloses a kind of terminal carboxyl polyester resins, are obtained by the group lease making melt polycondensation reaction of following weight percent content: polyalcohol 25~45%, aromatic polycarboxylic acid 35~65%, aliphatic polyol acid 0~3%, branching agent 0~1%, acidolysis agent 6~20%, esterification catalyst 0.01~0.15%.The invention also discloses the preparation methods of the carboxyl polyester resin.The polyester resin has suitable glass transition temperature, softening point, viscosity and storage stability, prepares 60 ° of gloss, excellent flow leveling and the weather resistance that resulting powdery paints has 96% or more with it.
Description
Technical field
The invention belongs to polyester resin technical field, it is related to a kind of terminal carboxyl polyester resin and preparation method thereof.
Background technique
The raising of powder coating technology is that paint industry sets about the synthesis result to improve equipment with construction technology from raw material,
Target is to obtain various aspects of performance and the comparable coating of liquid coating, including pleasing appearance, lower solidification temperature, relatively thin
Coating, higher outdoor durable, good application property, while being also actively working to environmental protection and improving cost performance etc..Improve powder
The appearance of last coating film is the target that people pursue always, makes high levelling, the film of high glaze is always powdery paints circle
Emphasis of interest.Powdery paints is generally made of resin, curing agent, pigments and fillers, auxiliary agent etc., master of the resin as powdery paints
Film forming matter is wanted, is the key that obtain high glaze, high levelling film.
In the film forming procedure of powdery paints, construct in substrate powder particle must through melting, flowing, moisten ground,
The stages such as film coalescence, levelling.Require that the polyester resin viscosity as powdery paints critical material wants low to obtain high levelling,
And the too low mechanical performance for influencing resin of viscosity；On the other hand, in order to qualified storage stability, powdery paints polyester
The glass transition temperature of resin must be at 50 DEG C or more, and weather-proof polyester even will be at 60 DEG C or more, but glass transition temperature is too high
The melt flow temperature of corresponding resin is also accordingly got higher, and levelling is deteriorated.Domestic and international less document patent report high glaze powdery paints
With terminal carboxyl polyester resin and preparation method thereof, United States Patent (USP) US6555226 report a kind of acid value be 35~55mgKOH/g,
Hydroxyl value is less than 10mgKOH/g, viscosity is less than the high glaze terminal carboxyl polyester resin of 1500mPas (200 DEG C), main using new
The synthesis such as pentanediol, trimethylolpropane, 1,6- hexylene glycol, terephthalic acid (TPA), Isosorbide-5-Nitrae-cyclohexane cyclohexanedimethanodibasic, trimellitic anhydride,
60 ° of gloss can reach 98% 96% or more after powdery paints film forming solidification is made, but that as being analyzed above
The glass transition temperature highest of sample, terminal carboxyl polyester resin synthesized by the patent only has 55 DEG C, influences it and powdery paints is made
Storage stability limits its application and promotes.
As the coating in industrial application always industry and it is civilian in play the role of very important, coating for a long time
Exist in the form of a solution, with organic solvent diluting, volatilize harmful VOC when in use, and the appearance of VOC is not only raw material
Significant wastage even more to the pollution of environment, while endangering the health of the mankind.Powdery paints and coating are to develop ten in recent years
Divide rapid technology and technique, saving power and preventing pollution dye, VOC free discharge.Powdery paints is using resin binder and curing agent as film forming matter
Matter, and it is aided with the powder morphology coating of the solid of filler and functional aid.It is different from general coating, it not with solvent or
Water is as dispersing agent, and using air as decentralized medium.The shortcomings that appearance of powdery paints overcomes traditional coating, coating is with solid
Body exists, and coating process is constructed with electrostatic gun, and the powdery paints landed can be recycled and be sprayed again, theoretically be realized
Nearly 100% full utilization.
With the continuous expansion of powdery paints application field, powdery paints is widely used in all kinds of security doors, aluminum profile, text
The coating in the fields such as part cabinet.Because powdery paints is environment friendly and pollution-free, coating efficiency is high, and film performance is excellent, nowadays metal anti-theft door
Coating almost all uses powder spray.Existing security door powder coating it is most general be transfer printing wood grain, then one layer of solvent of outer cover
Type coating is protected transfer wood grain.And because of Environmental Factors, the high pollution of solvent based coating has had become increasingly limited.
Lacquer finish protective coating outside wood grain also needs to be changed to powdery paints transparent powder.
There are many transparent powders, but the coating protection of not applicable transfer printing wood grain in the market.Because the ink of transfer printing wood grain exists
170 DEG C or more meeting high temperature distillations keep wood grain unintelligible or even become nothing.Indoor transparent powder solidification temperature is 180 DEG C, and outdoor is saturating
Bright powder solidification temperature is 190-200 DEG C, and to do 170 DEG C below must add low temperature curing agent.In addition, because decorative and beautiful
Degree also requires transparent powder to have lower glossiness.
Chinese patent 201510248814.1 discloses low smooth transparent powder paint of one kind and preparation method thereof, is by GMA
Type Acrylic transparent powder paint and polyester transparent system powdery paints carry out dry-mixed obtained, the invention according to the mass ratio of 1:1
Using the transparent powder paint of two kinds of differential responses speed systems, coating surface gloss can be largely reduced, glossiness is reachable
10 or less.
Chinese patent 201710846930.2 discloses a kind of low temperature curing type powdery paints and its preparation method and application,
It is made of raw material from the following weight: 60-70 parts of epoxy resin；2-3 parts of low temperature curing agent；0-1.5 parts of levelling agent；Wetting agent 0-
1.5 part；20-35 parts of blanc fixe；0.5-1.5 parts of curing accelerator；0-2 parts of other auxiliary agents, the powdery paints energy of the formula
Heat preservation 5-20min realization is fully cured at enough 100-120 DEG C of seeds.
Chinese patent 201210170321.7 discloses a kind of ultra-low-temperature solidity powder coating and its application method, in powder
Ultraviolet initiator and infrared absorbing agents are added in coating, using the cryogenic curing powder of infrared and ultraviolet dual curing mode
Coating, solidification temperature is low, the time is short, solidification is abundant.
However, above-mentioned patent powdery paints Shortcomings in the prior art, disclosed in patent 201510248814.1
Matt powder gloss is extremely unstable, poor reproducibility；The disclosed powder of patent 201710846930 and patent 2201210170321.7
Coating is indoor system, can not meet the requirement of security door weatherability；And powdery paints disclosed in patent 201210170321.7 is not
It is transparent and matt powder system.Therefore it needs to prepare, the powdery paints of the characteristics such as transparency height low with glossiness.
Summary of the invention
The object of the present invention is to provide a kind of terminal carboxyl polyester resin, which has suitable glass transition temperature
Degree, softening point, viscosity and storage stability prepare 60 ° gloss, excellent stream of the resulting powdery paints with 95% or more with it
Levelling energy and weather resistance.
It is a further object of the present invention to provide the preparation methods of terminal carboxyl polyester resin.
A kind of terminal carboxyl polyester resin provided by the invention melts contracting by the group lease making for including following weight percent content
Poly- reaction obtains:
Heretofore described polyalcohol be neopentyl glycol, ethylene glycol, 2- methyl-1,3-propanediol, 1,3-PD, 1,
The mixing of one or more of 2- propylene glycol, diethylene glycol (DEG), 1,6- hexylene glycol, 1,4-butanediol and 1,4-CHDM
Object.
Heretofore described aromatic polycarboxylic acid is the mixing of one or both of terephthalic acid (TPA) and M-phthalic acid
Object.
Heretofore described aliphatic polyol acid is adipic acid, decanedioic acid, azelaic acid, Isosorbide-5-Nitrae-cyclohexane cyclohexanedimethanodibasic, rich horse
The mixture of acid and one or more of maleic acid, wherein it is preferred that adipic acid.
Heretofore described branching agent is trimethylolpropane, trimethylolethane or pentaerythrite, wherein it is preferred that three
Hydroxymethyl-propane.
Heretofore described acidolysis agent is made of acidolysis agent A and acidolysis agent B, wherein the acidolysis agent A is isophthalic two
Formic acid, adipic acid, decanedioic acid, Isosorbide-5-Nitrae-cyclohexane cyclohexanedimethanodibasic, trimellitic anhydride, pyromellitic dianhydride, fumaric acid anhydride and maleic anhydride
One or more of mixture, wherein it is preferred that one of M-phthalic acid, adipic acid and trimellitic anhydride or two
Kind or more mixture；The acidolysis agent B is M-phthalic acid, adipic acid, decanedioic acid, Isosorbide-5-Nitrae-cyclohexane cyclohexanedimethanodibasic, inclined benzene
The mixture of one or more of three acid anhydrides, pyromellitic dianhydride, fumaric acid anhydride and maleic anhydride, wherein it is preferred that isophthalic two
The mixture of one or more of formic acid, adipic acid and trimellitic anhydride.
Heretofore described esterification catalyst is the organic tins compounds such as Mono-n-butyltin or Dibutyltin oxide.
Second object of the present invention is achieved through the following technical solutions: the preparation side of above-mentioned terminal carboxyl polyester resin
Two step synthetic methods that method uses comprising following steps:
(1) in a kettle, the polyalcohol and branching agent of proportional quantity is added, is heated to material melting；Then successively
The aromatic polycarboxylic acid, aliphatic polyol acid and esterification catalyst of proportional quantity is added, is passed through nitrogen and continues temperature reaction, until 180 DEG C of esters
Change water to start to generate and distillate；Then 250 DEG C, after the esterification water discharge to 95% in coreaction 5~10 hours are gradually heated to, acid
Value reaches 10~18mgKOH/g；
(2) the acidolysis agent for taking proportional quantity, the acidolysis agent for being 4~12% using weight percent are remaining heavy as acidolysis agent A
The acidolysis agent of percentage 2~8% is measured as acidolysis agent B, wherein the ingredient of acidolysis agent A is not identical as the ingredient of acidolysis agent B；In step
Suddenly acidolysis agent A is added in the reactant in (1) and continues 3~5h of heat preservation, acid value vacuumizes polycondensation when reaching 21~30mgKOH/g
0.5~5h, acid value reach 15~25mgKOH/g；Then acidolysis agent B is added to be blocked, after reacting 0.5~3h, acid value to 30
When~55mgKOH/g, that is, stop reaction, depolymerization obtains the terminal carboxyl polyester resin of even molecular weight distribution.
The acid value of the polyester resin of the method for the present invention preparation is 30~55mgKOH/g, and hydroxyl value is less than 10mgKOH/g, glass
Changing transition temperature is 55~75 DEG C, and melt viscosity is 2000~7000mPa.s, and number-average molecular weight is 1000~7000, has and closes
The features such as suitable glass transition temperature, softening point, good storage stability, with a certain proportion of triglycidyl isocyanurate
(TGIC) and filler, auxiliary agent mixing, through melting extrusion mixing, it is cooling, crush, sieving, obtained powdery paints at 200 DEG C,
There is 96% or more 60 ° of gloss, excellent flow leveling and weather resistance under 10min condition of cure.
Invention of the invention can be summarized are as follows:
The object of the present invention is to provide a kind of for protecting the transparent powder paint of transfer printing wood grain, by weight
It include: 80-95 parts of terminal carboxyl polyester resin, 5-8 parts of isocyanuric acid three-glycidyl ester, 0.7-1 parts of levelling agent, catalytic promoter
0.1-1 parts and delustering agent 2-8 parts.The levelling agent is acrylate leveling agent, and the catalytic promoter is modified crown ether
Catalyst, the delustering agent are acrylic acid mixture.Provided by the present invention for protecting the transparent powder paint of transfer printing wood grain
Solidification temperature it is low, glossiness is low, and adhesive force is good, and has the characteristics such as water-fast.
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of for protecting the transparent powder of transfer printing wood grain
Coating, low provided by the present invention for protecting the solidification temperature of transparent powder paint of transfer printing wood grain, transparency is good, glossiness
Low, water resistance and adhesive force are good.
On the one hand, the present invention provides a kind of for protecting the transparent powder paint of transfer printing wood grain, prepares raw material by weight
Amount part meter include:
80-95 parts of terminal carboxyl polyester resin, 5-8 parts of isocyanuric acid three-glycidyl ester, 0.7-1 parts of levelling agent, catalysis promote
Into 0.1-1 parts and delustering agent 2-8 parts of agent.
The acid value of the terminal carboxyl polyester resin is 18-56mgKOH/g, and softening point is 100-120 DEG C, glass transition temperature
50-65℃.For example, in embodiments of the invention, the terminal carboxyl polyester resin is profound new resin (Shanghai) limited public affairs
Take charge of the CRYLCCOAT 2451-6 of production.
The levelling agent is acrylate leveling agent；For example, in some embodiments of the present invention, the levelling
Agent is the transparent levelling agent 486C of TROY company production；In another example in some embodiments of the present invention, the levelling agent
For the transparent levelling agent PL-200 of Resiflow company production.
The catalytic promoter is modified crown ether catalyst；For example, the catalysis in embodiments of the invention
Promotor is the CCY168 of Zhong Fa company production.
The delustering agent is acrylic acid mixture；For example, in some embodiments of the present invention, the delustering agent is wide
The delustering agent A9 in state pool and production；In another example in some embodiments of the present invention, the delustering agent is Anhui scape into life
The delustering agent M-70 of production.
Preferably, the carboxyl end group resin, the mass ratio of isocyanuric acid three-glycidyl ester are 13.3:1；Described urges
The mass ratio for changing promotor and delustering agent is 1:8.
In some further preferred embodiments, also wrapped in the transparent powder paint for protecting transfer printing wood grain
It includes: 1.5 parts and 1 part of tin oxide of magnesia.
Therefore, as a kind of preferred technical solution, the transparent powder paint of protection transfer printing wood grain of the present invention,
Its prepare raw material by weight include: 80-95 parts of carboxyl end group resin, 5-8 parts of isocyanuric acid three-glycidyl ester, levelling agent
0.7-1 parts, 0.1-1 parts of catalytic promoter, 2-8 parts of delustering agent, 1.5 parts of magnesia and 1 part of tin oxide.
On the other hand, the preparation method for the transparent powder paint that the present invention provides a kind of for protecting transfer printing wood grain, tool
Body the following steps are included:
(1) it is pre-mixed: taking the raw material of the powdex of formulation dosage, be placed in high-speed mixer after mixing 3-6 minutes, obtain
To mixture A；
(2) it squeezes out: the mixture A that step (1) obtains being squeezed out at 80-120 DEG C with extruder, obtains mixture B；
(3) it crushes: mixture B that step (2) obtains be crushed into 180 meshes with vertical pulverizer to get to described
For protecting the transparent powder paint of transfer printing wood grain.
Furthermore the spraying method for the transparent powder paint that the present invention provides a kind of for protecting transfer printing wood grain, it is described
Spraying method are as follows: by the transparent powder paint of the above-mentioned protection transfer printing wood grain being prepared, use 60-90KV high-pressure electrostatic, spray
It is applied on the film of transfer printing wood grain, is then toasted 15-20 minutes at 150-160 DEG C, that is, complete the saturating of protection transfer printing wood grain
The spraying of bright powdery paints.
In the embodiment of some preferred spraying methods, toasted using infrared heating system.
Therefore, embodiment as one preferred, a kind of spraying of the transparent powder paint for protecting transfer printing wood grain
Method: the transparent powder paint of the above-mentioned protection transfer printing wood grain being prepared is sprayed at wood using 60-90KV high-pressure electrostatic
On the film of line transfer, infrared curing system is then used, is toasted 10 minutes at 150 DEG C, the wavelength of infrared light is 2.4-2.7
μm, that is, complete the spraying of the transparent powder paint of protection transfer printing wood grain.
The invention has the benefit that
Provided by the present invention for protecting the solidification temperature of the transparent powder paint of transfer printing wood grain low, interlayer adhesive ability
By force, transparency is high, glossiness is low, water-tolerant.
The present invention passes through the mass ratio of adjustable side carboxy resin and isocyanuric acid three-glycidyl ester, improves for protecting
The adhesive force of the transparent powder paint of transfer printing wood grain.
The present invention passes through the mass ratio for adjusting catalytic promoter and delustering agent, and preparation is used to protect the transparent of transfer printing wood grain
Powdery paints transparency is good, and glossiness is low.
The present invention solidifies in infrared curing system, not only may be used by the way that magnesia and tin oxide are added in powdery paints
To reduce the curing time of powdery paints, the water resistance of powdery paints is also improved.
Specific embodiment
Basic embodiment
Illustrate: the "-" in all tables of the present invention indicates that this content is not present.
It is a kind of for protecting the transparent powder paint of transfer printing wood grain, prepare raw material by weight include:
80-95 parts of terminal carboxyl polyester resin, 5-8 parts of isocyanuric acid three-glycidyl ester, 0.7-1 parts of levelling agent, catalysis promote
Into 0.1-1 parts and delustering agent 2-8 parts of agent.
Wherein, the acid value of terminal carboxyl polyester resin is 18-56mgKOH/g, and softening point is 100-120 DEG C, glass transition temperature
50-65℃；Levelling agent is acrylate leveling agent；Catalytic promoter is modified crown ether catalyst；The delustering agent is acrylic acid
Mixture.
This be used for protect transfer printing wood grain transparent powder paint the preparation method comprises the following steps:
(1) it is pre-mixed: taking the raw material of the powdex of formulation dosage, be placed in high-speed mixer after mixing 3-6 minutes, obtain
To mixture A；
(2) it squeezes out: the mixture A that step (1) obtains being squeezed out at 80-120 DEG C with extruder, obtains mixture B；
(3) it crushes: mixture B that step (2) obtains be crushed into 180 meshes with vertical pulverizer to get to described
For protecting the transparent powder paint of transfer printing wood grain.
This is for protecting the transparent powder paint of transfer printing wood grain to be sprayed at transfer printing wood grain using 60-90KV high-pressure electrostatic
It on film, is then toasted 15-20 minutes at 150-160 DEG C, that is, completes the spray of the transparent powder paint of protection transfer printing wood grain
It applies.
By adjusting the specific experiment parameter in the implementation of basis, embodiment 1-10 shown in following table has been obtained.
By adjusting the additive amount and ratio of terminal carboxyl polyester resin and isocyanuric acid three-glycidyl ester, catalytic promoter
With the additive amount and ratio of delustering agent, magnesia and the additive amount of tin oxide etc. have obtained the embodiment 1-10 in table 1-2.From reality
It applies in a 1-6 as can be seen that the solidification baking temperature of the transparent powder paint provided by the present invention for protecting transfer printing wood grain is low,
It is 150-160 DEG C, short curing time is 15-20 minutes, and ply adhesion is good, and transparency is high, glossiness is low and water-tolerant.
The glossiness test of film is tested according to method specified in GB/T 9754-2007.
The adhesive force intensity of film is tested according to method specified in GB/T 9286-1998.
The transparency of film according to national standards tested by method specified in GB/T 1721-1979
The water resistance of film is tested according to method specified in GB/T 1733-1993.
Powdery paints disclosed in 1 Chinese patent of comparative example, 201410187316.6 embodiment 4
Powdery paints disclosed in 2 Chinese patent of comparative example, 201010293861.5 Example formulations E
Table 1
It can be seen that from the embodiment 1-6 in above-mentioned table 1 by adjusting terminal carboxyl polyester resin and the shrink of isocyanuric acid three
The ratio and catalytic promoter of glyceride and the ratio of delustering agent, can be improved the transparent powder paint of offer adhesive force,
Transparency and reduction glossiness.Wherein embodiment 4 and embodiment 3 the difference is that having adjusted terminal carboxyl polyester resin and isocyanide urine
The ratio of sour three-glycidyl ester be 13.3:1, embodiment 4 provide for protect transfer printing wood grain transparent powder paint it is attached
Put forth effort to be 0, and the adhesive force in embodiment 3 is 1.Embodiment 5 is with embodiment 3 the difference is that adjusting catalytic promoter and delustring
The ratio of agent is 1:8, and the transparency for the transparent powder paint that embodiment 5 provides is 84, glossiness 56, and is mentioned in embodiment 3
The transparency of the transparent powder paint of confession is 81, glossiness 63.
Table 2
In the transparent powder paint that the embodiment 7-10 in above-mentioned table 2 is provided, contain magnesia and tin oxide.Wherein,
Embodiment 7 is with embodiment 6 the difference is that wherein containing magnesia and tin oxide, it can be seen that the transparent powder in embodiment 7
The water resistance of coating is 28d, and the water resistance in embodiment 6 is 26 days, illustrates that magnesia and being added with for tin oxide are conducive to mention
The water resistance of high powdery paints.Embodiment 8 is with embodiment 7 the difference is that using is infrared curing system, in 150 DEG C of bakings
The transparent powder paint water resistance of preparation in 10 minutes is 35d, and water resistance is obviously improved, the difference of embodiment 9 and embodiment 8
It is in formula that embodiment 10 is with embodiment 8 the difference is that being free of tin oxide in formula without magnesia.
The glossiness of powdery paints disclosed in comparative example 1 is 83%, the glossiness of powdery paints disclosed in comparative example 2
It is 91%, it can be seen that the glossiness of powdery paints disclosed in embodiment 1-10 provided by the invention is lower than comparative example 1 and right
The glossiness of ratio 2, powdery paints provided by the invention is low, has dumb light.
Only as described above, is only a preferred embodiment of the present invention, when the model that cannot limit implementation of the invention with this
It encloses, i.e., generally according to simple equivalent changes and modifications made by content documented by the claims in the present invention and description of the invention,
All it is still covered by the claims of the invention.It is searched in addition, abstract part and title are intended merely to auxiliary patent document
It seeks and being used, the interest field being not intended to limit the invention.
Claims (10)
1. a kind of terminal carboxyl polyester resin, it is characterised in that: by the group lease making melt polycondensation including following weight percent content
Reaction obtains:
The polyalcohol is neopentyl glycol, ethylene glycol, 2- methyl-1,3-propanediol, 1,3-PD, 1,2-PD, two
The mixture of one or more of glycol, 1,6- hexylene glycol, 1,4-butanediol and 1,4-CHDM；The fragrance
Polyacid is the mixture of one or both of terephthalic acid (TPA) and M-phthalic acid；The aliphatic polyol acid for oneself two
The mixture of one or more of acid, decanedioic acid, azelaic acid, Isosorbide-5-Nitrae-cyclohexane cyclohexanedimethanodibasic, fumaric acid and maleic acid；Described
Branching agent is trimethylolpropane, trimethylolethane or pentaerythrite.
2. the preparation method of terminal carboxyl polyester resin as described in claim 1, it is characterised in that: the following steps are included:
(1) in a kettle, the polyalcohol and branching agent of proportional quantity is added, is heated to material melting；Then it sequentially adds
Aromatic polycarboxylic acid, aliphatic polyol acid and the esterification catalyst of proportional quantity, are passed through nitrogen and continue temperature reaction, until 180 DEG C of esterification waters
Start to generate and distillate；Then 250 DEG C are gradually heated to, after the esterification water discharge to 95% in coreaction 5~10 hours, acid value reaches
To 10~18mgKOH/g；
(2) the acidolysis agent for taking proportional quantity, the acidolysis agent for being 4~12% using weight percent is as acidolysis agent A, remaining weight hundred
Divide the acidolysis agent than 2~8% as acidolysis agent B, wherein the ingredient of acidolysis agent A is not identical as the ingredient of acidolysis agent B；In step
(1) acidolysis agent A is added in the reactant in and continues 3~5h of heat preservation, acid value vacuumizes polycondensation 0.5 when reaching 21~30mgKOH/g
~5h, acid value reach 15~25mgKOH/g；Then acidolysis agent B is added to be blocked, after reacting 0.5~3h, acid value to 30~
When 55mgKOH/g, that is, stop reaction, depolymerization obtains the terminal carboxyl polyester resin of even molecular weight distribution.
3. a kind of for protecting the transparent powder paint of transfer printing wood grain, it is characterised in that: its by weight include: carboxyl end group
80-95 parts of polyester resin, 5-8 parts of isocyanuric acid three-glycidyl ester, 0.7-1 parts of levelling agent, 0.1-1 parts of catalytic promoter and disappear
2-8 parts of photo etching.
4. transparent powder paint as claimed in claim 3, it is characterised in that: its by weight include: carboxyl end group resin
80-95 parts, 5-8 parts of isocyanuric acid three-glycidyl ester, 0.7-1 parts of levelling agent, 0.1-1 parts of catalytic promoter, delustering agent 2-8
Part, magnesia 1.5 and 1 part of tin oxide.
5. transparent powder paint as claimed in claim 3, it is characterised in that: the levelling agent is acrylate leveling agent；
The catalytic promoter is modified crown ether catalyst；The delustering agent is acrylic acid mixture.
6. transparent powder paint as claimed in claim 3, it is characterised in that: the acid value of the terminal carboxyl polyester resin is
18-56mgKOH/g。
7. transparent powder paint as claimed in claim 3, it is characterised in that: the carboxyl end group resin and isocyanuric acid three contract
The mass ratio of water glyceride is 13.3:1.
8. transparent powder paint as claimed in claim 3, it is characterised in that: the mass ratio of the catalytic promoter and delustering agent
For 1:8.
9. the preparation method of the transparent powder paint as described in claim 3-8 any one, it is characterised in that: including following step
It is rapid:
(1) it is pre-mixed: taking the raw material of the powdex of formulation dosage, be placed in high-speed mixer after mixing 3-6 minutes, mixed
Close object A；
(2) it squeezes out: the mixture A that step (1) obtains being squeezed out at 80-120 DEG C with extruder, obtains mixture B；
(3) it crushes: the mixture B that step (2) obtains be crushed into 180 meshes with vertical pulverizer and be used for get to described
Protect the transparent powder paint of transfer printing wood grain.
10. a kind of spraying method of transparent powder paint as claimed in claim 3, it is characterised in that: the spraying method
Are as follows: the transparent powder paint is sprayed on the film of transfer printing wood grain using 60-90KV high-pressure electrostatic, then in 150-
It is toasted 15-20 minutes at 160 DEG C, that is, completes the spraying for protecting the transparent powder paint of transfer printing wood grain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810788381.2A CN108948826A (en) | 2018-07-18 | 2018-07-18 | A kind of terminal carboxyl polyester resin and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810788381.2A CN108948826A (en) | 2018-07-18 | 2018-07-18 | A kind of terminal carboxyl polyester resin and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN108948826A true CN108948826A (en) | 2018-12-07 |
Family
ID=64496153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810788381.2A Withdrawn CN108948826A (en) | 2018-07-18 | 2018-07-18 | A kind of terminal carboxyl polyester resin and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821709A (en) * | 2019-02-27 | 2019-05-31 | 浙江超浪新材料有限公司 | A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints |
| CN111234185A (en) * | 2020-01-15 | 2020-06-05 | 浙江光华科技股份有限公司 | High-crystallinity bifunctional polyester resin for low-temperature curing extinction powder coating and synthesis method thereof |
| CN111393960A (en) * | 2020-04-13 | 2020-07-10 | 福建万安实业集团有限公司 | Special powder coating for high-leveling agricultural carriage and preparation method thereof |
| CN113558067A (en) * | 2021-07-22 | 2021-10-29 | 擎天材料科技有限公司 | Antibacterial agent, antibacterial powder coating and preparation method and application thereof |
-
2018
- 2018-07-18 CN CN201810788381.2A patent/CN108948826A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109821709A (en) * | 2019-02-27 | 2019-05-31 | 浙江超浪新材料有限公司 | A kind of spraying process and the powdery paints for protecting transfer printing wood grain powdery paints |
| CN111234185A (en) * | 2020-01-15 | 2020-06-05 | 浙江光华科技股份有限公司 | High-crystallinity bifunctional polyester resin for low-temperature curing extinction powder coating and synthesis method thereof |
| CN111393960A (en) * | 2020-04-13 | 2020-07-10 | 福建万安实业集团有限公司 | Special powder coating for high-leveling agricultural carriage and preparation method thereof |
| CN111393960B (en) * | 2020-04-13 | 2021-11-09 | 福建万安实业集团有限公司 | Special powder coating for high-leveling agricultural carriage and preparation method thereof |
| CN113558067A (en) * | 2021-07-22 | 2021-10-29 | 擎天材料科技有限公司 | Antibacterial agent, antibacterial powder coating and preparation method and application thereof |
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