CN106243937B - A kind of dry-mixed extinction type powdery paints with good low temperature curing performance and preparation method thereof - Google Patents
A kind of dry-mixed extinction type powdery paints with good low temperature curing performance and preparation method thereof Download PDFInfo
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- CN106243937B CN106243937B CN201610795277.7A CN201610795277A CN106243937B CN 106243937 B CN106243937 B CN 106243937B CN 201610795277 A CN201610795277 A CN 201610795277A CN 106243937 B CN106243937 B CN 106243937B
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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
-
- 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
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/682—Polyesters containing atoms other than carbon, hydrogen and oxygen containing halogens
- C08G63/6824—Polyesters containing atoms other than carbon, hydrogen and oxygen containing halogens derived from polycarboxylic acids and polyhydroxy compounds
-
- 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
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/695—Polyesters containing atoms other than carbon, hydrogen and oxygen containing silicon
- C08G63/6954—Polyesters containing atoms other than carbon, hydrogen and oxygen containing silicon derived from polxycarboxylic acids and polyhydroxy compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The present invention relates to a kind of low-temperature setting dry-mixed extinction powder coating polyester resin bi-component and its powder composition, the high acid value component of the dry-mixed dull polyester resin mainly adds the species and dosage of the high trihydroxylic alcohol of degree of branching；The final acid value for having heightened polyester resin simultaneously improves its activity to 65 75mgKOH/g；The low acid value component of dry-mixed dull polyester resin mainly selects some flexible raw materials to adjust the melt viscosity of polyester, it is blocked simultaneously by introducing the polyacid such as maleopimaric acid, Pyromellitic Acid of high activity, its acid value is heightened to 28 35mgKOH/g, ensures its low temperature curing properties.The dry mixed powders coating prepared by the height acid value component polyester resin can carry out low-temperature setting at 140 160 DEG C and realize the extinction effect that gloss is 20 40%.
Description
Technical field
The invention belongs to powdery paints preparation fields；Especially a kind of dry-mixed extinction type with good low temperature curing performance
Bi-component polyester toner coating composition and preparation method thereof.
Background technology
Since last century the seventies come out, powdery paints is because it is without organic solvent, and 100% is solid constituent, phase
Than conventional coating, have it is pollution-free, save the energy and resource, coating machinery intensity are high and that excess coating material can recycle completely etc. is excellent
Point is just applied to the painting of the shells such as household electrical appliance, auto industry, office accommodation, metal material, outdoor building more and more widely
Dress.
As requirement of the client to powdery paints is higher and higher, extinction type powdery paints exists as decorative preferable kind
The application of industry is wider.At present, in extinction powder coating field mainly by way of adding physics or chemical quenching agent come
Realize delustring, and in order to obtain relatively low gloss, it generally requires to add larger amount of delustering agent.Though the and addition of a large amount of delustering agents
The extinction performance of powdery paints so is substantially increased, but also reduces the other performance of paint coatings.Powdery paints usually may be used also
After powdery paints is respectively prepared using high acid value resin and low acid value resin, spraying after equal proportion is dry-mixed is consolidated using two components
The difference for changing speed realizes that the rough surface on microcosmic so as to fulfill delustring, can obtain 18-45's without addition delustring auxiliary agent
Gloss.
Perfluoropolyether (PFPE) has the characteristics such as heat-resisting, anti-oxidant, radioresistance, corrosion-resistant, non-ignitable, in Material Field
To being widely applied.It is widely used, obtained using the coating of the preparations such as PFPE- polyurethane, PFPE- polyester, PFPE- epoxy resin
Good effect.Self-cleaning paint is such as made, for skyscraper and bridge spanning the sea, still has protection and dress using 10~20a
Decorations act on；For marine petroleum exploitation platform and drilling equipment, durability reaches more than 10a.E.I.Du Pont Company is once by PFPE fluoro coatings
For aluminum curtain walls, coating shows high stability, excellent weatherability and superior stain resistant in photo-oxidation process
Property, easily wipe or cleaned by rainwater.PFPE fluororesin can be made into high solid coating, not only have outdoor resistance to well
Hou Xing, wearability and chemical resistance, while meet environmental requirement, therefore the research of PFPE fluoro coatings causes people great
Concern.The powdery paints being modified using perfluoropolyether has also had substantial amounts of research, but uses perfluoropolyether-modified poly-
Ester powder is added in powdery paints, the adhesive force of coating can be greatly reduced, and its solidification temperature can be substantially increased.
Current common perfluoropolyether-modified polyester powder coating is required for higher temperature when curing, generally 200
DEG C or so.Excessively high solidification temperature does not only result in it in engineering plastics, timber and metal alloy compositions field using being limited
System, and the consumption of the energy is added, while also affect production efficiency.Therefore, exploitation at low temperature (140-160 DEG C) with regard to energy
Abundant cured perfluoropolyether-modified polyester powder coating system, can not only be greatly decreased energy consumption and waste, Er Qieke
Greatly to widen its application field, there are boundless market prospects.
CN102010501A discloses a kind of polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint, by
Component including following weight percent content is obtained through melt polycondensation reaction：Polyalcohol 25~45%, aromatic polycarboxylic acid 40~
55%th, aliphatic polyol acid 0~8%, branching agent 0~5%, acidolysis agent 5~15%, esterification catalyst 0.01~0.15%.It is described
Polyester resin has relatively low solidification temperature, preferable flow leveling, mechanical performance and good anti-thick film pin hole.
CN103131308A discloses a kind of extra-weather-proof dry-mixed extinction powder coating height acid value bicomponent terminal carboxyl and gathers
Ester resin composition, including extra-weather-proof powdery paints high acid value terminal carboxyl polyester resin and the low acid value of extra-weather-proof powdery paints
Terminal carboxyl polyester resin.The extra-weather-proof powder coating gloss of dry-mixed delustring prepared by the polyester and resin composition is 18~45%,
With good extinction effect and splendid weatherability, polyester/TGIC and polyester/HAA curing systems powder can be suitble to apply simultaneously
Material, is especially suitable for being used in polyester/TGI curing system powdery paints.
The content of the invention
The present invention improves the prior art, and two kinds of polyester materials in double component polyester resin are carried out not respectively
Same modification.Specifically, it is exactly to add in terminal hydroxy group perfluoropolyether during preparation to high acid value polyester resin with into one
Step improves the physical property of coating, while in order to overcome the dispersion degree of terminal hydroxy group perfluoropolyether in the reaction system is bad to ask
Topic adds in phosphate derivative, and terminal hydroxy group perfluoropolyether is made to carry out combined crosswise in esterification process with polyalcohol, improves product
Stability；Silane coupling agent is added in preparation process for low acid value polyester resin, evenly spreads to low acid value polyester tree
In fat, during heating is cured, combined crosswise is carried out with the strand of high acid value polyester resin, to reduce its solidification temperature
And improve the adhesion property of entire coating.Applicant is found surprisingly that, terminal hydroxy group perfluor is added in high acid value polyester resin and is gathered
Ether and polyalcohol can partly reduce the solidification temperature of perfluoropolyether ester, avoid and go out in low-temperature setting as esterification feed
The solid particle of existing perfluoropolyether ester is so that therefore the performance of coating is unstable.By the mixing of two kinds of modified components, not only carry
The high chemical stability of coating, reduces solidification temperature, and also assures that the adhesive force of coating does not decline, and achieves expectation
Less than technique effect.The present invention provides a kind of dry-mixed extinction type powdery paints with good low temperature curing performance, the paintings
Material uses bi-component modified polyester resin, also discloses the preparation method of the powdery paints of the polyester resin in addition.
To solve the above-mentioned problems, technical solution provided by the invention is as follows：
A kind of dry-mixed extinction powder coating with good low temperature curing performance including modified high acid value polyester resin and changes
The low acid value polyester resin of property, wherein the modified high acid value polyester resin is mainly polymerized by the component of following parts by weight：End
20-60 parts of hydroxy-perfluoro polyethers, 30-70 parts of polyacid, 10-50 parts of polyalcohol, 1-5 parts of phosphate derivative, end-capping reagent 5-15
Part, 0.05-0.3 parts of esterification catalyst：The low acid value polyester resin of the modification is in its preparation process that silane coupling agent is equal
It is even to be distributed in modified low acid value polyester resin；The quality of the modified high acid value polyester resin and modified low acid value polyester resin
Than for 1:2-2:1.
The modified high acid polyester resin acid value is 65~75mgKOH/g, and glass transition temperature is 55~65 DEG C, is melted
Melt-viscosity is 1500~5500mPa.s (200 DEG C), and the molar ratio of hydroxyl and carboxyl is 0.80-0.95 in raw material:1.
The modified low in acidity polyester resin acid value is 28~35mgKOH/g, and glass transition temperature is 55~70 DEG C, is melted
Melt-viscosity is 2000~7500mPa.s (200 DEG C), and the molar ratio of hydroxyl and carboxyl is 0.90-0.98 in raw material:1.
The preparation method of the modified high acid polyester resin comprises the following steps：Preparation method comprises the following steps：It will
Terminal hydroxy group perfluoropolyether, polyalcohol, polyacid, esterification catalyst, phosphate derivative are all added in reaction kettle, in nitrogen
180-220 DEG C of dehydration esterification is progressively warming up under protection, then heats to 240-260 DEG C of continuation dehydration esterification.As reactant pH
When value is down to less than 9, decompression is lower, and the reaction was continued and removes low boilers.When temperature of charge is down to 180-190 DEG C, envelope is added in
It holds agent and reacts 1~1.5h, the high acid polyester resin is made.
Wherein described terminal hydroxy group perfluoropolyether and the molar ratio of polyalcohol are 0.2-3:1, preferably 1-2:1.
Wherein described polyalcohol is one in neopentyl glycol, hexylene glycol, glycerine 5-10%, trimethylolethane, glucose
Kind is a variety of, and preferably described polyalcohol includes following components, neopentyl glycol 20-55mol%；Hexylene glycol 20-35mol%；Glycerine
5-10%；Trimethylolethane 5-25mol%；Glucose 5-10mol%.
The polyacid is M-phthalic acid, terephthalic acid (TPA), succinic anhydride, adipic acid, pyromellitic acid anhydride, Malaysia
One or more in pimaric acid.It is preferred that the polyacid includes following components, M-phthalic acid 20-45mol%；Terephthaldehyde
Sour 15-35mol%；Succinic anhydride 15-30mol%；Adipic acid 15-35mol%；Pyromellitic acid anhydride 5-10mol%；Malaysia
Pimaric acid 5-15%.
The end-capping reagent is the one or more in trimellitic anhydride, phthalic anhydride, maleopimaric acid, adipic acid.
The preparation method of the modified low in acidity polyester resin comprises the following steps：Polyalcohol, polyacid, catalyst is complete
Portion is added in reaction kettle, is progressively warming up to 180-220 DEG C of dehydration esterification under nitrogen protection, is then heated to 240-260 DEG C
Continue dehydration esterification；When reactant pH value is down to below 9, decompression is lower, and the reaction was continued and removes low boilers, and it is even to add in silane
Join agent；When temperature of charge is down to 180-190 DEG C, adds in end-capping reagent and react 1~1.5h, modified low in acidity polyester tree is made
Fat.
The molar ratio of the silane coupling agent and polyalcohol is 0.1-0.3:1.
The phosphate derivative is phosphate ester surfactant.
On the other hand, the present invention also provides a kind of powdery paints for having used above-mentioned polyester resin.Except above-mentioned polyester tree
Outside fat, powdery paints further include curing agent, curing accelerator, levelling agent, texture agent, degasser, antioxidant, pigment and its
Its filler etc..Wherein, curing agent can be beta-hydroxy alkylamide and triglycidyl isocyanurate TGIC.Curing accelerator
It can be the addition compound product of isophorone diisocyanate and imidazoles.Levelling agent can be the polyacrylate with hydroxyl and carboxyl
Copolymer.Texture agent can be fluoropolymer.Degasser can be modified micronizing wax.Antioxidant can be hexichol first
Ketone compounds or benzoin compound.Pigment can be titanium dioxide, carbon black, iron oxide red, iron oxide yellow, ultramarine etc..Its
Its filler is also filler usually used in this field.The content of various composition is well-known to those skilled in the art.
In addition, the invention also discloses the preparation method of above-mentioned powdery paints, i.e., by dosage than heterogeneity be put into it is high
It is sufficiently mixed in fast mixer uniformly, then feeds the mixture into screw extruder and fully melt and be kneaded, then squeeze out,
Tabletting, crushing obtain above-mentioned powdery paints.
Compared with prior art, powdery paints of the invention low temperature curing type polyester resin and the powder using the resin
Last coating has the advantages that：
(1) can under 140-160 DEG C of low temperature preferably film-forming, so as to not only reduce consumption and the wave to the energy
Take, and widened its application field significantly, can to metal etc. can heat-resisting base material spray, can also be to timber or modeling
The thermal sensitivity materials such as material are sprayed；
(2) dry-mixed extinction performance is outstanding, and in the case of adding delustering agent, itself is dry-mixed can to obtain 20-40%'s
Gloss；
(2) good leveling property of powdery paints and film-forming is excellent, disclosure satisfy that industrial-scale production requirement.
Specific embodiment
The technical solution of invention is described in detail with reference to specific embodiment.
Embodiment 1
The preparation method of modified high acid polyester resin comprises the following steps：Preparation method comprises the following steps：By end hydroxyl
Base perfluoropolyether, polyalcohol, polyacid, esterification catalyst, phosphate derivative are all added in reaction kettle, are protected in nitrogen
Under be progressively warming up to 180-220 DEG C of dehydration esterification, then heat to 240-260 DEG C continuation dehydration esterification.When reactant pH value drops
During to less than 9, decompression is lower, and the reaction was continued and removes low boilers.When temperature of charge is down to 180-190 DEG C, end-capping reagent is added in
And 1~1.5h is reacted, the high acid polyester resin is made.Terminal hydroxy group perfluoropolyether and the molar ratio of polyalcohol are 1-2:1.
The preparation method of modified low in acidity polyester resin comprises the following steps：By reactions such as polyalcohol, polyacid, catalyst
Object is all added in reaction kettle, is progressively warming up to 180-220 DEG C of dehydration esterification under nitrogen protection, is then heated to 240-
260 DEG C of continuation dehydration esterifications.When reactant pH value is down to below 9, decompression is lower, and the reaction was continued and removes low boilers, adds in silicon
Alkane coupling agent.It when temperature of charge is down to 180-190 DEG C, adds in end-capping reagent and reacts 1~1.5h, modified low in acidity is made and gathers
Ester resin.The molar ratio of silane coupling agent and polyalcohol is 0.1-0.3:1.
The mass ratio of modified high acid value polyester resin and modified low acid value polyester resin is 1:1 mixing, with curing agent, curing
It is put into high-speed mixer and is sufficiently mixed uniformly after accelerating agent, levelling agent, texture agent, degasser, antioxidant, pigment mixing,
Then feed the mixture into screw extruder and fully melt and be kneaded, then extrusion, tabletting, crushing, obtain powdery paints.
Comparative example 1
Using common high acid polyester resin and common low in acidity polyester resin according to 1:1 mixing promotees with curing agent, curing
It is put into high-speed mixer and is sufficiently mixed uniformly, so after into agent, levelling agent, texture agent, degasser, antioxidant, pigment mixing
After feed the mixture into screw extruder and fully melt and be kneaded, then extrusion, tabletting, crushing, obtain powdery paints.
Comparative example 2
Using modified high acid polyester resin of the present invention and common low in acidity polyester resin according to 1:1 mixing, with consolidating
It is put into after agent, curing accelerator, levelling agent, texture agent, degasser, antioxidant, pigment mixing in high-speed mixer fully
It is uniformly mixed, then feeds the mixture into screw extruder and fully melt and be kneaded, then extrusion, tabletting, crushing, obtain
Powdery paints.
Comparative example 3
Using common high acid polyester resin and low in acidity polyester resin of the present invention according to 1:1 mixing, with curing agent,
It is put into high-speed mixer and is sufficiently mixed after curing accelerator, levelling agent, texture agent, degasser, antioxidant, pigment mixing
It is even, it then feeds the mixture into screw extruder and fully melts and be kneaded, then extrusion, tabletting, crushing, obtain powder painting
Material.
| Detection project | Embodiment 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Solidification temperature (DEG C) | 158 | 170 | 196 | 155 |
| Granularity (D50)/μm | 32 | 30 | 35 | 33 |
| Mobility (30s)/g | 128 | 134 | 140 | 143 |
| Coating layer thickness/μm | 60~70 | 60~70 | 60~70 | 60-70 |
| Adhesive force (scratch)/grade | 2 | 1 | 1 | 0 |
| Bend test (cylindrical shaft)/mm | 3 | 2 | 2 | 2 |
| Strong basicity resisting (30%NaOH)/h | 480 | 48 | 186 | 60 |
The present invention can be summarized with others without prejudice to the concrete form of the spirit or essential characteristics of the present invention.The present invention's
All embodiments can only all be considered the description of the invention rather than limitation, and every technique according to the invention content is made
Any trickle amendment or equivalent substitution gone out, belongs within technical scheme.
Claims (9)
1. a kind of dry-mixed extinction powder coating with good low temperature curing performance, including modified high acid value polyester resin and modification
Low acid value polyester resin, it is characterised in that wherein described modified high acid value polyester resin is mainly polymerize by the component of following parts by weight
It forms：20-60 parts of terminal hydroxy group perfluoropolyether, 30-70 parts of polyacid, 10-50 parts of polyalcohol, 1-5 parts of phosphate derivative, sealing end
5-15 parts of agent, 0.05-0.3 parts of esterification catalyst：The low acid value polyester resin of the modification is in its preparation process that silane is even
Connection agent is evenly spread in low acid value polyester resin；The matter of the modified high acid value polyester resin and modified low acid value polyester resin
Amount is than being 1:2-2:1；The modified high acid value polyester resin acid value is 65~75mgKOH/g, glass transition temperature for 55~
65 DEG C, 200 DEG C of melt viscosities are 1500~5500mPa.s, and the molar ratio of hydroxyl and carboxyl is 0.80-0.95 in raw material:1；Institute
It is 28~35mgKOH/g to state modified low acid value polyester resin acid value, and glass transition temperature is 55~70 DEG C, and 200 DEG C of meltings are viscous
It spends for 2000~7500mPa.s, the molar ratio of hydroxyl and carboxyl is 0.90-0.98 in raw material:1.
2. powdery paints as described in claim 1, it is characterised in that the preparation method bag of the modified high acid value polyester resin
Include following steps：Terminal hydroxy group perfluoropolyether, polyalcohol, polyacid, esterification catalyst, phosphate derivative are all added to instead
It answers in kettle, is progressively warming up to 180-220 DEG C of dehydration esterification under nitrogen protection, then heat to 240-260 DEG C and continue to be dehydrated ester
Change；When reactant pH value is down to below 9, decompression is lower, and the reaction was continued and removes low boilers；180- is down in temperature of charge
At 190 DEG C, add in end-capping reagent and react 1~1.5h, the modified high acid value polyester resin is made.
3. powdery paints as described in claim 1, it is characterised in that wherein described terminal hydroxy group perfluoropolyether and polyalcohol rub
Your ratio is 0.2-3:1.
4. powdery paints as described in claim 1, it is characterised in that the end-capping reagent is trimellitic anhydride, phthalic acid
One or more in acid anhydride, maleopimaric acid, adipic acid.
5. powdery paints as described in claim 1, it is characterised in that the preparation method bag of the low acid value polyester resin of the modification
Include following steps：Polyalcohol, polyacid, catalyst are all added in reaction kettle, are progressively warming up under nitrogen protection
180-220 DEG C of dehydration esterification then heats to 240-260 DEG C of continuation dehydration esterification；When reactant pH value is down to below 9, subtract
The reaction was continued and removes low boilers for pressure, adds in silane coupling agent；When temperature of charge is down to 180-190 DEG C, envelope is added in
It holds agent and reacts 1~1.5h, modified low acid value polyester resin is made.
6. powdery paints as described in claim 1, it is characterised in that wherein described polyalcohol is neopentyl glycol, hexylene glycol, sweet
One or more in oil, trimethylolethane, glucose；The polyacid is M-phthalic acid, terephthalic acid (TPA), succinic acid
One or more in acid anhydride, adipic acid, pyromellitic acid anhydride, maleopimaric acid.
7. powdery paints as claimed in claim 6, it is characterised in that the polyalcohol includes following components, neopentyl glycol 20-
55mol%, hexylene glycol 20-35mol%, glycerine 5-10%, trimethylolethane 5-25mol%, glucose 5-10mol%；Institute
It states polyacid and includes following components, M-phthalic acid 20-45mol%, terephthalic acid (TPA) 15-35mol%, succinic anhydride 15-
30mol%, adipic acid 15-35mol%, pyromellitic acid anhydride 5-10mol%, maleopimaric acid 5-15%.
8. powdery paints as described in claim 1, it is characterised in that in addition to polyester resin, further include curing agent, cure rush
Into agent, levelling agent, texture agent, degasser, antioxidant, pigment and filler.
A kind of 9. method for preparing any one of the claim 1-8 powdery paints, it is characterised in that：According to proportioning by various groups
Divide to be put into high-speed mixer and be sufficiently mixed uniformly, then feed the mixture into screw extruder and fully melt and be kneaded,
Then extrusion, tabletting, crushing obtain the powdery paints.
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| CN108239509B (en) * | 2016-12-23 | 2021-01-01 | 上海理日化工新材料有限公司 | Polyether ester hot melt adhesive with good heat resistance and preparation method thereof |
| CN108503814B (en) * | 2018-04-25 | 2020-05-15 | 黄山市向荣新材料有限公司 | Epoxidized polyester resin and preparation method and application thereof |
| CN109180922B (en) * | 2018-09-07 | 2021-06-22 | 安徽恒隆新材料有限公司 | Low-temperature curing type polyester resin and preparation method and application thereof |
| CN109337544A (en) * | 2018-09-18 | 2019-02-15 | 深圳市派旗纳米技术有限公司 | PCBA board waterproof, moisture-proof, corrosion resistant nano coating, preparation method and its construction method |
| EP3835379A4 (en) | 2019-08-02 | 2021-11-03 | Kinte Materials Science and Technology Co., Ltd. | Polyester resin composition, powder coating and workpiece |
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| JP5419941B2 (en) * | 2011-09-30 | 2014-02-19 | 大日本塗料株式会社 | Powder coating composition |
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| TW201221593A (en) * | 2010-10-13 | 2012-06-01 | Akzo Nobel Powder Coatings Ningbo Co Ltd | Hybrid polyester fluorocarbon powder coating composition and a process for the manufacture thereof |
| CN102719180A (en) * | 2012-07-04 | 2012-10-10 | 佛山市顺德区伊诗德新材料科技有限公司 | Preparation method of polyester resin capable of being used for outdoor dry mixed extinction powder coating |
| CN103131308A (en) * | 2012-12-28 | 2013-06-05 | 广州擎天材料科技有限公司 | High-low acid value bi-component end carboxyl polyester resin composition for super-weather-proof dry-blending extinction powder coatings and application of the same |
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