CN109810618A - A kind of modified polyester powder coating and preparation method thereof - Google Patents
A kind of modified polyester powder coating and preparation method thereof Download PDFInfo
- Publication number
- CN109810618A CN109810618A CN201910063893.7A CN201910063893A CN109810618A CN 109810618 A CN109810618 A CN 109810618A CN 201910063893 A CN201910063893 A CN 201910063893A CN 109810618 A CN109810618 A CN 109810618A
- Authority
- CN
- China
- Prior art keywords
- powder coating
- modified polyester
- polyester powder
- modified
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention belongs to technical field of coatings, in particular to a kind of modified polyester powder coating and preparation method thereof, the modified polyester powder coating includes the component of following parts by weight: 55-65 parts of polyester resin, 4-8 parts of curing agent, 0.5-2 parts of levelling agent, 0.5-2 parts of styrax, 2-5 parts of poly-dopamine and 30-40 parts of filler, it is as viscose processed, molten polyester resin, electrostatic co-spun yarn, extrusion granulating and pulverizes and sieves obtained by preparation, bubble, shrinkage cavity and the particle on its coating can be effectively reduced, there is good film forming, weatherability, glossiness and adhesive force.
Description
Technical field
The invention belongs to technical field of coatings, in particular to a kind of modified polyester powder coating and preparation method thereof.
Background technique
Powdery paints has at home and abroad had been widely used and has developed, in powder coating, due to some workpiece because
It often will lead to coating surface the problems such as there are holes for ground (such as casting, heat prick plate) and apparent bubble, shrinkage cavity, pin hole occur
Or granular substance, the beautiful decoration effect of coating surface is seriously destroyed, or even jeopardize the anticorrosion service life of coating.
Common degasser has benzoin, also known as diphenylhydroxyethanone (being commonly called as styrax) in powdery paints, is white or light
Yellow odorlessness crystal, fusing point are 133-137 DEG C.Styrax is widely applied in general powdery paints, but is easy under high temperature
Discoloration, and its degasification is faint, for the workpiece such as above-mentioned casting, degasifying effect is poor, it is difficult to timely and effectively will
The gas entered in melt coating inside ground excludes, coating the defects of there are still significant bubble, shrinkage cavity, particles.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide a kind of modified poly ester powder painting
Material, can effectively reduce bubble, shrinkage cavity and the particle on coating, have good film forming.
Second object of the present invention is to provide a kind of preparation method of modified polyester powder coating, so that made from it
Powdery paints has good film forming.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that
A kind of modified polyester powder coating, the component including following parts by weight:
By using above-mentioned technical proposal, polyester resin polymer general name as obtained by polyalcohol and polyacid polycondensation is main
Refer to linear thermoplastics' resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyarylate, is
One kind has excellent performance, widely used engineering plastics.For the present invention using polyester resin as matrix, curing agent can improve polyester resin
Performance is made polyester resin that irreversible change procedure occur, is increased the stability after application of coating with this；Levelling agent can drop
The surface tension of low coating, improves the levelability and homogeneity of coating, and then coating is promoted to be formed during the drying and film forming process
One smooth, smooth, uniform film；Styrax and polyester resin have good compatibility, can form a film in coating
Oxidation reaction occurs in journey, consumes the oxygen in bubble and reduces bubble diameter, while promoting dissolution of the gas in resin
And dispersion, to reach defoaming effect, so that its manufactured coating has good coating effect.
On the basis of the above, poly-dopamine is also contained in the present invention, poly-dopamine is the environment friend with permanent adhesion
Good type large biological molecule, the functional group that surface is rich in can make polyester resin surface form functional coating, and then to polyester tree
The surface-functionalized modification of rouge reduces bubble, shrinkage cavity and the generation of particle from root, can play with styrax and cooperate with work
With effectively improving the film-formation result of coating.
Filler can reduce the usage amount of other raw materials, reduce cost, can also reduce receipts of the material in extrusion process
Contracting, is further reduced the shrinkage cavity of material；In addition, poly-dopamine can also modify filler surface, so that adding in coating
It remains to that there is good film forming after mass filler, the grain amount in coating is reduced, so that coating is with good power
There is good film forming on the basis of intensity.
Further, the polyester resin is PBT.
By using above-mentioned technical proposal, polybutylene terephthalate (PBT) (PET) is terephthalic acid (TPA) and Isosorbide-5-Nitrae-fourth two
The condensation polymer of alcohol has the characteristics that intensity is high, fatigue durability is good, electrical insulating property is excellent, meets water and is not easily decomposed, can preferably fit
Cladding for surfaces such as casting.
Further, the curing agent is that TGIC is compounded with T105M by the weight ratio of 1:1.
By using above-mentioned technical proposal, TGIC and T105M are the curing agent of low acid value polyester resin, can be preferable
It is coexisted with poly-dopamine, both there is good heat-resisting weatherability, while improving the solidification effect of polyester resin, moreover it is possible to
It effectively acts synergistically, the yield of bubble is effectively reduced.
Further, the levelling agent is one of GLP505, GLP588, GLP599 or a variety of mixtures.
By using above-mentioned technical proposal, GLP505, GLP588, GLP599 are GLP series levelling agent, are had preferable anti-
Electrostatic interaction improves the powder utilization at dead angle and the glossiness of film, plays the role of optical brightener；Meanwhile the levelling agent can also mention
Compatibility between high coating each component can participate in reacting when polyester resin crosslinks, and then improve powder coating
Chemical-resistance and ageing-resistant performance.
Further, the filler is nanometer calcium carbonate.
By using above-mentioned technical proposal, nanometer calcium carbonate property is stablized, will not in material with other components
Reaction is learned, can be rapidly and uniformly scattered in polyester resin in the system of poly-dopamine, to have good reinforcement
Effect.
Further, the modified polyester powder coating further includes the pigment that parts by weight are 0.5-1 parts.
By using above-mentioned technical proposal, the addition of pigment enables to coating that can be prepared into difference according to actually required
Color increases the application range of coating to meet the needs of different occasions, environment, personal preference etc..
To realize above-mentioned second purpose, the present invention provides the following technical scheme that
A kind of preparation method of modified polyester powder coating, comprising the following steps:
1., dopamine hydrochloride powder is dissolved in deionized water, adjust pH to 8.0-8.5, stand 68- after being slowly stirred 1-2h
The viscose containing poly-dopamine is made in 72h；
2., polyester resin is melted, obtain polyester melt；
3., polyester melt and viscose used into electrostatic co-spun yarn technology so that viscose is coated on the outside of polyester melt,
Modified polyester fiber is obtained after evaporating water；
4., the modified polyester fiber, curing agent, levelling agent, styrax and the filler that 3. obtain step after mixing, investment is double
In screw extruder, extruding pelletization obtains modified poly ester particle；
5., the modified poly ester particle that 4. obtains step crush, sieving, obtain modified polyester powder coating.
By using above-mentioned technical proposal, the dopamine in dopamine hydrochloride aqueous solution can occur in weakly alkaline environment
Autoxidation generates quinone, and quinone is reset to form DHI, then further aggregates into poly-dopamine, forms the viscose containing poly-dopamine；
Polyester resin and viscose use electrostatic co-spun yarn technology, can increase the compatibility of other processing aids and polyester resin, phase
For polyester resin is immersed in viscose with better modified effect, so that worth coating has good film forming.
Further, step 1. in, the mass ratio of the dopamine hydrochloride and deionized water is 1:1.
By using above-mentioned technical proposal, dopamine hydrochloride itself has good water solubility, the addition of deionized water
The viscose that measuring can be less has certain viscosity and operates convenient for electrostatic spinning, additionally aids the later period at the same time for moisture
Quickly removal, improves the preparation efficiency of coating.
Further, step 3. in, the process conditions of evaporating water are as follows: 80-90 DEG C, dry 30min.
By using above-mentioned technical proposal, at 80-90 DEG C, the evaporation rate of moisture is very fast, while ensure that poly- DOPA
The stability of amine provides good basis for subsequent process.
In conclusion the invention has the following advantages:
1, in the present invention, poly-dopamine can promote polyester resin surface to form functional coating, and play and cooperate with styrax
Effect, improves the dispersion effect of filler, reduces the generation of bubble, shrinkage cavity and particle, effectively improve the film forming of coating；
2, curing agent is that TGIC is compounded with T105M by the weight ratio of 1:1 in the present invention, can preferably and poly-dopamine
It coexists, and can also act synergistically between two curing agent, while improving the heat-resisting weatherability of coating, bubble is effectively reduced
Yield；
3, changed in the present invention by first using electrostatic co-spun yarn technology to be made in polyester resin and viscose containing poly-dopamine
Property polyester fiber, the compatibility of other processing aids and polyester resin can be increased with this so that worth coating have it is good
Film forming.
Detailed description of the invention
Fig. 1 is the process flow chart for preparing modified polyester powder coating.
Specific embodiment
Below in conjunction with attached drawing 1, invention is further described in detail.
It should be noted that component and reagent used in the present invention are from purchase gained on the market.Wherein, polyester tree
Rouge is preferably PBT, can also be in addition to this other polyester resin；Curing agent is preferably the weight of TGIC and T105M by 1:1
It, in addition to this can be with its exclusive use or other curing agent than compounding；Levelling agent be preferably GLP505, GLP588,
In addition to this one of GLP599 or a variety of mixtures can also be other kinds of levelling agent；Filler is preferably nanometer
In addition to this calcium carbonate can also be other fillers.
Embodiment 1
A kind of preparation method of modified polyester powder coating, comprising the following steps:
1., the dopamine hydrochloride powder of 2kg is dissolved in the deionized water of 2kg, the trihydroxy methyl amino first for being 1M with concentration
Alkane buffer adjusts the pH to 8.0 of solution, and 2h is slowly stirred under the mixing speed of 30r/min, stands 68h, is made containing poly-
The viscose of dopamine；
2., the PBT that weighs 55kg melted, obtain polyester melt；
3., polyester melt and viscose used into electrostatic co-spun yarn technology so that viscose is coated on the outside of polyester melt,
In 80 DEG C of at a temperature of drying 30min, so that moisture obtains modified polyester fiber after being evaporated；
4., resting in peace GLP505,2kg of T105M, 1kg of TGIC, 2kg of 3. modified polyester fiber, 2kg that step obtains
The fragrant, nanometer calcium carbonate of 30kg and the color masterbatch of 0.5kg after mixing, are put into double screw extruder, in 230-240 DEG C of temperature
Lower extruding pelletization is spent, modified poly ester particle is obtained；
5., the modified poly ester particle that 4. obtains step crush, sieving, obtain modified polyester powder coating.
Embodiment 2- embodiment 8
Embodiment 2- embodiment 8 on the basis of the method for embodiment 1, adjusts the content of its component and component, specifically
Adjusting parameter see the table below one.
The raw material and preparation parameter of the modified polyester powder coating of one embodiment 1- embodiment 8 of table
Comparative example 1
Difference from example 1 is that being not added with dopamine hydrochloride in this comparative example, directly will in preparation process
PBT carries out extruding pelletization after mixing with other components.
Comparative example 2
Difference from example 1 is that PBT is directly immersed in the viscose containing poly-dopamine in this comparative example, it is evaporated
Corresponding modified polyester fiber is obtained after moisture.
Embodiment 1 to embodiment 8 and comparative example 1 and comparative example 2 are carried out the performance as shown in following table two by performance test
Test, testing result are shown in Table three.
Two performance test of table and method
The performance test results of three embodiment 1- embodiment 8 of table and comparative example 1- comparative example 2
Referring to table three, the embodiment of the present invention is compared with the testing result of comparative example 1 and comparative example 2, can be obtained
It arrives: using the technical solution of embodiment 1- embodiment 8, film forming, weatherability, the gloss of modified polyester powder coating obtained
Degree and adhesive force are substantially better than comparative example 1 and comparative example 2；In addition, modified poly ester powder made from embodiment 1- embodiment 3
The performance of coating is more preferably.Property polyester powder coating produced by the present invention can effectively reduce bubble on its coating, shrinkage cavity as a result,
And particle, there is good film forming, weatherability, glossiness and adhesive force.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (9)
1. a kind of modified polyester powder coating, which is characterized in that the component including following parts by weight:
2. a kind of modified polyester powder coating according to claim 1, which is characterized in that the polyester resin is PBT.
3. a kind of modified polyester powder coating according to claim 1, which is characterized in that the curing agent be TGIC with
T105M is compounded by the weight ratio of 1:1.
4. a kind of modified polyester powder coating according to claim 1, which is characterized in that the levelling agent be GLP505,
One of GLP588, GLP599 or a variety of mixtures.
5. a kind of modified polyester powder coating according to claim 1, which is characterized in that the filler is nano-calcium carbonate
Calcium.
6. a kind of modified polyester powder coating according to claim 1, which is characterized in that the modified polyester powder coating
It further include the pigment that parts by weight are 0.5-1 parts.
7. a kind of preparation method of modified polyester powder coating described in any one of claim 1-6, which is characterized in that packet
Include following steps:
1., dopamine hydrochloride powder is dissolved in deionized water, adjust pH to 8.0-8.5, stand 68- after being slowly stirred 1-2h
The viscose containing poly-dopamine is made in 72h；
2., polyester resin is melted, obtain polyester melt；
3., polyester melt and viscose used into electrostatic co-spun yarn technology so that viscose is coated on the outside of polyester melt,
Modified polyester fiber is obtained after evaporating water；
4., the modified polyester fiber, curing agent, levelling agent, styrax and the filler that 3. obtain step after mixing, investment is double
In screw extruder, extruding pelletization obtains modified poly ester particle；
5., the modified poly ester particle that 4. obtains step crush, sieving, obtain modified polyester powder coating.
8. a kind of preparation method of modified polyester powder coating according to claim 7, which is characterized in that step 1. in,
The dopamine hydrochloride and the mass ratio of deionized water are 1:1.
9. a kind of preparation method of modified polyester powder coating according to claim 7, which is characterized in that step 3. in,
The process conditions of evaporating water are as follows: 80-90 DEG C, dry 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910063893.7A CN109810618B (en) | 2019-01-23 | 2019-01-23 | Modified polyester powder coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910063893.7A CN109810618B (en) | 2019-01-23 | 2019-01-23 | Modified polyester powder coating and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109810618A true CN109810618A (en) | 2019-05-28 |
| CN109810618B CN109810618B (en) | 2020-12-08 |
Family
ID=66604881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910063893.7A Active CN109810618B (en) | 2019-01-23 | 2019-01-23 | Modified polyester powder coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109810618B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964416A (en) * | 2019-12-24 | 2020-04-07 | 浙江光华科技股份有限公司 | Weather-resistant wear-resistant polyester powder coating and preparation method thereof |
| CN114456686A (en) * | 2022-01-21 | 2022-05-10 | 余姚市亚宇工贸有限公司 | Powder coating and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348684A (en) * | 2007-07-18 | 2009-01-21 | 天津市振东涂料有限公司 | Preparation of polyester type powder paint |
| CN103409044A (en) * | 2013-07-08 | 2013-11-27 | 中国科学院宁波材料技术与工程研究所 | Powder coating with high pencil hardness |
| CN104119781A (en) * | 2013-04-28 | 2014-10-29 | 广东兴发铝业有限公司 | Low temperature curing thermosetting polyester powder coating and preparation method thereof |
| EP2997581A1 (en) * | 2013-05-17 | 2016-03-23 | Biotectix LLC | Impregnation of a non-conductive material with an intrinsically conductive polymer |
| CN105566872A (en) * | 2015-12-23 | 2016-05-11 | 暨南大学 | Polydopamine-modified halloysite nanotube / polylactic acid composite material and preparation and application thereof |
| CN105985704A (en) * | 2015-12-23 | 2016-10-05 | 铜陵市肆得科技有限责任公司 | High-impact-resistance powder coating |
| CN107033746A (en) * | 2016-10-18 | 2017-08-11 | 铜陵市肆得科技有限责任公司 | Last coating of the composite modified epoxy antirusting powder of a kind of hydrophobic anti-soil for automobile chassis and preparation method thereof |
| CN107987688A (en) * | 2017-12-01 | 2018-05-04 | 成都信达高分子材料有限公司 | A kind of heat-dissipation powder paint |
| CN108485389A (en) * | 2018-03-19 | 2018-09-04 | 浙江巨化技术中心有限公司 | A kind of fluoropolymer powder coatings and its preparation method and application |
-
2019
- 2019-01-23 CN CN201910063893.7A patent/CN109810618B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348684A (en) * | 2007-07-18 | 2009-01-21 | 天津市振东涂料有限公司 | Preparation of polyester type powder paint |
| CN104119781A (en) * | 2013-04-28 | 2014-10-29 | 广东兴发铝业有限公司 | Low temperature curing thermosetting polyester powder coating and preparation method thereof |
| EP2997581A1 (en) * | 2013-05-17 | 2016-03-23 | Biotectix LLC | Impregnation of a non-conductive material with an intrinsically conductive polymer |
| CN103409044A (en) * | 2013-07-08 | 2013-11-27 | 中国科学院宁波材料技术与工程研究所 | Powder coating with high pencil hardness |
| CN105566872A (en) * | 2015-12-23 | 2016-05-11 | 暨南大学 | Polydopamine-modified halloysite nanotube / polylactic acid composite material and preparation and application thereof |
| CN105985704A (en) * | 2015-12-23 | 2016-10-05 | 铜陵市肆得科技有限责任公司 | High-impact-resistance powder coating |
| CN107033746A (en) * | 2016-10-18 | 2017-08-11 | 铜陵市肆得科技有限责任公司 | Last coating of the composite modified epoxy antirusting powder of a kind of hydrophobic anti-soil for automobile chassis and preparation method thereof |
| CN107987688A (en) * | 2017-12-01 | 2018-05-04 | 成都信达高分子材料有限公司 | A kind of heat-dissipation powder paint |
| CN108485389A (en) * | 2018-03-19 | 2018-09-04 | 浙江巨化技术中心有限公司 | A kind of fluoropolymer powder coatings and its preparation method and application |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110964416A (en) * | 2019-12-24 | 2020-04-07 | 浙江光华科技股份有限公司 | Weather-resistant wear-resistant polyester powder coating and preparation method thereof |
| CN110964416B (en) * | 2019-12-24 | 2021-07-13 | 浙江光华科技股份有限公司 | Weather-resistant wear-resistant polyester resin, powder coating and preparation method thereof |
| CN114456686A (en) * | 2022-01-21 | 2022-05-10 | 余姚市亚宇工贸有限公司 | Powder coating and preparation method thereof |
| CN114456686B (en) * | 2022-01-21 | 2022-11-11 | 余姚市亚宇工贸有限公司 | Powder coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109810618B (en) | 2020-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104289161B (en) | A kind of aluminium hydroxide microcapsule of melamine formaldehyde resin cladding and preparation method thereof | |
| CN109810618A (en) | A kind of modified polyester powder coating and preparation method thereof | |
| JP2009523854A (en) | Coating of organic and inorganic pigments with acrylic resin | |
| CN105733001A (en) | Preparation method of high-performance black full-matte polyimide film | |
| CN106433472B (en) | Novel aqueous water-in-water multicolor coating and preparation method thereof | |
| KR102041284B1 (en) | Calcium carbonate filler for resin, and resin composition containing said filler | |
| CN110205004A (en) | A kind of fast cure polyester powdery paints and preparation method thereof | |
| CN106009615A (en) | Modification-reinforced thermoplastic polyurethane composite material for 3D printing | |
| CN102070918A (en) | Preparation method of calcium carbonate masterbatch | |
| CN111518419A (en) | Modified pearlescent pigment, preparation method and application thereof, plastic and coating | |
| JP5248500B2 (en) | Method for preparing pigment granules by two-stage extrusion | |
| IT9019667A1 (en) | PROCEDURE FOR THE PRODUCTION OF PIGMENT CONCENTRATES AND PRODUCTS SO OBTAINED, HIGHLY CONCENTRATED, HIGH DISPERSION AND MAXIMUM COLORISTIC YIELD | |
| WO2005111120A1 (en) | Masterbatch compositions | |
| CN1177364A (en) | Composition contg. fine solid particles | |
| CN103351648A (en) | Composite titanium dioxide and processing method thereof | |
| CN103849136B (en) | Comprise the polymer composition of the enhancing of the titanium dioxide granule of cladding | |
| CN102167918A (en) | Single-component normal-temperature curing coating solution for endowing polyolefin film with long-lasting anti-fogdrop function | |
| CN108003551A (en) | A kind of transparent ABS composite material for 3D printing and preparation method thereof | |
| JP7071602B1 (en) | Masterbatch manufacturing method | |
| CN110229591A (en) | A kind of fast cure polyester powdery paints and preparation method thereof | |
| CN109181483A (en) | A kind of epoxy powder coating dulling and curing agent and the preparation method and application thereof | |
| CN104861435A (en) | Smooth color master batch for PTT film | |
| JPH0780598A (en) | Water-soluble core material for injection molding | |
| CN106905668A (en) | A kind of stated polyesters master batch and a kind of technics of enhancing viscosity | |
| JP4558318B2 (en) | Method for producing a granular formulation of a plastic soluble colorant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |