CN115572523A - Polyester resin composition, coating and application - Google Patents
Polyester resin composition, coating and application Download PDFInfo
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- CN115572523A CN115572523A CN202211281390.5A CN202211281390A CN115572523A CN 115572523 A CN115572523 A CN 115572523A CN 202211281390 A CN202211281390 A CN 202211281390A CN 115572523 A CN115572523 A CN 115572523A
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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
- C09D167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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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
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
- C08G63/6854—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/6856—Dicarboxylic acids and dihydroxy compounds
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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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/44—Polyester-amides
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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
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
- C09D177/12—Polyester-amides
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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
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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
- C08G2150/00—Compositions for coatings
- C08G2150/20—Compositions for powder coatings
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Wood Science & Technology (AREA)
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Abstract
The invention discloses a polyester resin composition, a coating and application. The polyester resin with high acid value comprises the following preparation raw materials: the curing agent comprises a first polyol, a first polybasic acid, a first amine compound, a first acid decomposer, a first esterification catalyst, a first crown ether and a first curing accelerator; the low acid value polyester resin comprises the following preparation raw materials: a second polyol, a second polybasic acid, a second amine compound, a second acid degradation agent, a second esterification catalyst, a second crown ether and a second curing accelerator. The powder coating prepared from the polyester resin composition provided by the invention has excellent flexibility, and the cured coating still has excellent bending resistance and impact resistance after 3 months and under the low temperature condition of-20 ℃, so that the problem that the extinction performance and the mechanical performance of the powder coating cannot be considered at the same time is solved.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a polyester resin composition, a coating and application.
Background
The mechanical properties of the coatings sprayed via powder coatings are markedly time-dependent and temperature-dependent, and the mechanical properties of the coatings are reduced by the thermal movement of the small-molecule auxiliaries in the coating, which leads to increased matrix incompatibility, as the polyester resin, which is the main substance of the film-forming substance, relaxes or ages with time. On the other hand, the movement of a polymer chain is limited due to the temperature reduction, so that the coating is directly embrittled, the powder coating is difficult to meet the requirement of the secondary processing field even under the normal temperature condition, and the coating is more prone to crack in winter coating. With the shift of consumer aesthetic concepts, matting coatings are increasingly preferred by consumers for their elegant and soft surface effects. The extinction method of the existing powder coating mainly comprises extinction by an extinction agent and dry-mixing extinction, and the extinction effect is realized by constructing a microscopically inhomogeneous rough surface in principle, and an extinction coating prepared by any method has the defect of poor mechanical property, so that the extinction coating is more difficult to realize the coating requirement of post-processing than the conventional highlight coating.
Chinese patent CN112521838A discloses a delustering transparent polyester composition and a preparation method and application thereof, more types of monomers are used for synthesizing high-low acid polyester resin, so that the disorder degree of a curing system is increased, and a transparent coating prepared from the bicomponent polyester has higher light transmittance and lower gloss, but can only pass through 50cm positive impact. CN1053677658B discloses a polyester resin for TGIC cured high-toughness heat transfer powder coating and a preparation method thereof, the powder coating prepared from the polyester resin has higher glass transition temperature, the coating after heat transfer has clear texture, no paper sticking, and high toughness at-15 ℃, but the polyester is suitable for preparing high-gloss coating. In view of the above, many problems of high toughness matting powder coatings in the field of powder coatings are still needed to be solved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the polyester resin composition provided by the invention has excellent flexibility, and the cured coating still has excellent bending resistance and impact resistance under the low temperature condition of-20 ℃ after 3 months, so that the problem that the extinction performance and the mechanical performance of the powder coating cannot be simultaneously considered is solved.
The second aspect of the invention also provides a coating.
The third aspect of the invention also provides an application.
According to the first aspect of the invention, there is provided a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, wherein the acid value of the high acid value polyester resin is 47 to 60mgKOH/g, and the acid value of the low acid value polyester resin is 17 to 27mgKOH/g;
the high-acid-value polyester resin comprises the following preparation raw materials in parts by weight:
first polyol: 25-45 parts of a stabilizer; a first polybasic acid: 45-65 parts of a solvent; a first amine compound: 2-20 parts of a solvent; first acid hydrolysis agent: 7-20 parts; first esterification catalyst: 0.01 to 0.15 portion; first crown ether: 0.1-5 parts; first curing accelerator: 0.01 to 0.15 portion;
the low-acid-value polyester resin comprises the following preparation raw materials in parts by weight:
a second polyol: 20-45 parts of a solvent; second polybasic acid: 40-65 parts; a second amine compound: 2-20 parts of a solvent; second acid decomposing agent: 2-15 parts; second esterification catalyst: 0.01 to 0.15 portion; a second crown ether: 0.1-5 parts; a second curing accelerator: 0.01 to 0.1 portion.
The polyester resin composition according to the embodiment of the present invention has at least the following advantageous effects:
the powder coating prepared from the polyester resin composition provided by the invention has excellent flexibility, and the cured coating still has excellent bending resistance and impact resistance after 3 months and under the low temperature condition of-20 ℃, so that the problem that the extinction performance and the mechanical performance of the powder coating cannot be considered at the same time is solved. The matting effect is realized by matching the high-acid-value polyester and the low-acid-value polyester resin, and an additional matting agent is not needed; and secondly, a polyamide-polyester random copolymerization structure is formed by introducing the first amine compound and the second amine compound, an amide bond provides an additional hydrogen bond effect, the high-temperature and low-temperature resistance is better, and the coating is endowed with more excellent low-temperature mechanical properties. Meanwhile, the introduction of amido bond increases the structural difference of polyester resin, and provides good extinction performance for powder coating; finally, a crown ether/amine inclusion compound is formed by utilizing the hydrogen bond and the inclusion action of the crown ether and the amine compound, the inclusion compound further participates in the polymerization reaction to form a crown ether/polyesteramide ring type supermolecular structure, crown ether molecules still stably exist in a cross-linking network after the curing reaction of resin, the interlocking structure effectively prevents the slippage and the fracture of the molecular chain in the processes of impact and bending, and the toughness of the coating is greatly improved.
According to some embodiments of the invention, the high acid number polyester resin has a melt viscosity of 1000 to 7000 mPa-s; the glass transition temperature is 60-75 ℃; the number average molecular weight is 2000-8000.
According to some embodiments of the invention, the low acid number polyester resin has a melt viscosity of 4000 to 10000 mPa-s; the glass transition temperature is 60-75 ℃; the number average molecular weight is 2000-8000.
According to some embodiments of the invention, the first amine compound is selected from at least one of alanine, 2-aminobutyric acid, ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylenediamine, hexylenediamine, piperazine, diaminodiphenylether.
According to some embodiments of the invention, the second amine compound is selected from at least one of ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylenediamine, hexylenediamine, piperazine, diaminodiphenyl ether, N '-bis (2-hydroxyethyl) oxamide, N' -bis (2-hydroxyethyl) adipamide, caprolactam, polyamides having a molecular weight of 500 to 4000.
According to some embodiments of the invention, the first and second crown ethers are independently selected from at least one of 15-crown-5, benzo 15-crown-5, 18-crown-6, dicyclohexyl-18-crown-6, dibenzo 18-crown-6.
According to some embodiments of the invention, the first and second polyols are independently selected from at least two of neopentyl glycol, ethylene glycol, diethylene glycol, methylpropanediol, 1, 2-propanediol, butanediol, hexanediol, 1, 4-cyclohexanedimethanol, isosorbide, 2-methyl-2, 4-pentanediol, ethylbutylpropanediol, trimethylolethane, trimethylolpropane, pentaerythritol.
According to some embodiments of the invention, the first polyacid and the second polyacid are independently selected from at least one of terephthalic acid, isophthalic acid, 2, 6-naphthalenedicarboxylic acid, 1, 4-cyclohexanedicarboxylic acid, succinic acid, adipic acid.
According to some embodiments of the invention, the first and second acid breakers are independently selected from at least one of isophthalic acid, succinic acid, adipic acid, dodecanedioic acid, trimellitic anhydride.
According to some embodiments of the invention, the first esterification catalyst and the second esterification catalyst independently comprise at least one of a tin catalyst, a zinc catalyst, a bismuth catalyst, a titanium catalyst.
According to some embodiments of the invention, the tin catalyst comprises at least one of monobutyl tin oxide, monobutyl tin chloride, stannous oxalate, stannous octoate, stannous chloride, dibutyltin dilaurate, stannous octoate, dibutyltin bis (dodecyl sulfide), dibutyltin diacetate.
According to some embodiments of the invention, the zinc catalyst comprises at least one of zinc isooctanoate, zinc oxalate.
According to some embodiments of the invention, the bismuth catalyst comprises bismuth oxide.
According to some embodiments of the invention, the titanium catalyst comprises titanium dioxide.
According to some embodiments of the invention, the first and second cure accelerators include at least one of triphenylethylphosphonium bromide, triphenylphosphine.
According to some embodiments of the present invention, the method for preparing the high acid number polyester resin comprises the steps of:
s1, adding a first amine compound and a first crown ether in an inert atmosphere, heating to 80-110 ℃, and reacting for 0.5-1.5 hours to obtain a clathrate compound;
s2, adding a first polyol, a first polybasic acid and a first esterification catalyst in the step S1, heating to perform esterification reaction, gradually heating to 230-250 ℃, and reacting for 10-13 hours until the acid value reaches 6-20 mgKOH/g;
s3, adding a first acidolysis agent in the step S2, reacting for 1-4 hours at 220-235 ℃, wherein the acid value reaches 65-75 mgKOH/g; vacuumizing for 0.5-5 h, adding a first curing accelerator to obtain the high-acid-value polyester resin, wherein the acid value reaches 47-60 mgKOH/g.
According to some embodiments of the present invention, the method for preparing a low acid value polyester resin comprises the steps of:
s11, adding a second amine compound and a second crown ether in an inert atmosphere, heating to 80-110 ℃, and reacting for 0.5-1.5 hours to obtain a clathrate compound;
s12, adding a second polyol, a second polyacid and a second esterification catalyst in the step S10, heating to perform esterification reaction, then gradually heating to 230-250 ℃, and reacting for 10-13 hours until the acid value reaches 6-20 mgKOH/g;
s13, adding a second acidolysis agent in the step S11, and reacting at 220-235 ℃ for 1-4 hours until the acid value reaches 30-45 mgKOH/g; vacuumizing for 0.5-5 h until the acid value reaches 17-27 mgKOH/g, and adding a second curing accelerator to obtain the low-acid-value polyester resin.
Second aspect of the invention the second aspect of the embodiment of the present invention provides the use of a polyester resin composition as described above for the preparation of a coating.
The third aspect of the invention provides a coating, which comprises a component A and a component B, wherein the component A comprises the high-acid-value polyester resin, a first curing agent, a first pigment and filler and a first auxiliary agent; the component B comprises the low-acid-value polyester resin, a second curing agent, a second pigment and filler and a second auxiliary agent.
According to some embodiments of the invention, the mass ratio of the a component to the B component is 1.
According to some embodiments of the invention, the first curing agent and the second curing agent are independently selected from triglycidyl isocyanurate or hydroxyalkyl amides.
According to some embodiments of the invention, the first pigment and the second pigment are independently selected from carbon black, iron yellow, iron red, phthalocyanine green, titanium dioxide, barium sulfate, mica powder, calcium carbonate, silica, talc.
According to some embodiments of the invention, the first and second auxiliaries are independently selected from levelling agents, brighteners, benzoin, texturing agents, antioxidants.
The fourth aspect of the invention provides the application of the coating in security doors, elevator doors, fire doors, aluminum ceilings and household appliances.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention will be further described with reference to the examples, but the present invention is not limited to the examples.
The reagents, methods and equipment used in the invention are conventional in the technical field unless otherwise specified.
Acid value, viscosity, glass transition temperature: measured according to the T/GDTL 004-2019 standard.
Example 1
Example 1 provides a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, which were prepared as follows, and the component contents are shown in tables 1 and 2.
Preparation of high acid value polyester resin:
s1, adding a first amine compound and first crown ether into a 3L reaction kettle, introducing nitrogen, heating to 100 ℃, and keeping the temperature for 1h;
s2, sequentially adding first polyol, first polybasic acid and a first esterification catalyst, continuously heating to 180 ℃, performing polycondensation and dehydration, gradually heating to 240 ℃, and reacting for 13 hours until the acid value reaches 20mgKOH/g;
s3, adding a first acidolysis agent in the step S2, reacting for 4 hours at 220 ℃, adding a first curing accelerator, and obtaining the high-acid-value polyester resin, wherein the acid value reaches 70mgKOH/g, the vacuum degree (vacuum degree is-0.096 MPa) is about 0.5-5 hours, and the acid value reaches 53 mgKOH/g;
preparation of low acid value polyester resin:
s11, adding a second amine compound and second crown ether into a 3L reaction kettle, introducing nitrogen, heating to 100 ℃, and preserving heat for 1h;
s12, sequentially adding a second polyol, a second polybasic acid and a second esterification catalyst, continuously heating to 180 ℃, performing polycondensation and dehydration, gradually heating to 240 ℃, and reacting for 12 hours until the acid value reaches 18mgKOH/g;
s13, adding a second hydrolysis agent in the step S12, reacting at 220-235 ℃ for 1-4 hours until the acid value reaches 40mgKOH/g, vacuumizing (vacuum degree of-0.096 MPa) for about 0.5-5 hours until the acid value reaches 24mgKOH/g, and adding a second curing accelerator to obtain the low-acid-value polyester resin.
Examples 2 to 5
Examples 2-5 provide a series of polyester resin compositions comprising a high acid number polyester resin and a low acid number polyester resin, the high acid number polyester resin and the low acid number polyester resin being prepared by the same method as in example 1, with the component contents shown in tables 1 and 2.
TABLE 1 component contents (parts) of the high acid number polyester resins of examples 1 to 5
TABLE 2 component contents (parts) of low acid value polyester resins of examples 1 to 5
Comparative example 1
Comparative example 1 provides a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, the contents of components and the preparation method of which are the same as those of example 1, except that the high acid value polyester resin in comparative example 1 lacks the first amine compound.
Comparative example 2
Comparative example 2 provides a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, the contents of the components and the preparation method of which are the same as those of example 1, except that the high acid value polyester resin in comparative example 1 lacks the first crown ether.
Comparative example 3
Comparative example 3 provides a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, which have the same component contents and preparation methods as those of example 1, except that the first amine compound and the second amine compound are absent in the high acid value polyester resin and the low acid value polyester resin in comparative example 1.
Comparative example 4
Comparative example 4 provides a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, which were different in the content of components and the preparation method from example 1 in that the first crown ether and the second crown ether were absent in the high acid value polyester resin and the low acid value polyester resin in comparative example 1.
Comparative example 5
Comparative example 5 provides a polyester resin composition comprising a high acid value polyester resin and a low acid value polyester resin, which were different in the content of components and the preparation method from example 1 in that the first amine compound and the first crown ether were absent in the high acid value polyester resin and the low acid value polyester resin in comparative example 1; a second amine compound and a second crown ether.
Performance test
The polyester resins of examples 1 to 4 and comparative examples 1 to 5 are prepared into coating, specifically, the high acid value polyester resin and the low acid value resin of examples 1 to 4 and comparative examples 1 to 5 are respectively weighed and uniformly mixed with TGIC, titanium dioxide, barium sulfate, leveling agent and benzoin according to the dosage in the table 3, melted and respectively extruded by a screw extruder, tabletted and crushed, and then the tabletted materials are crushed and sieved to prepare the A component powder and the B component powder. And then, mixing the components A and B according to the proportion of 1:1, uniformly mixing, spraying the mixture on a metal plate with the surface being deoiled and derusted by adopting an electrostatic spray gun, curing for 10min at 200 ℃, and then carrying out various performance tests. The test results are shown in table 4, wherein the surface appearance is visually observed, the gloss is determined according to the regulation of GB/T9754-2007, the 60-degree incident angle is used for testing, the impact is determined according to the T/GDTL 004-2009 standard, and the T bend is determined according to the NCAA II-19 standard.
TABLE 3 component content of coating (parts)
TABLE 4 data for examples 1-4 and comparative examples 1-5
As can be seen from the test results in Table 4, compared with comparative examples 1 to 5, the polyester resin composition provided by the invention has excellent bending resistance and impact resistance after the coating is cured for 3 months and at a low temperature of-20 ℃, and has good extinction performance.
While the present invention has been described in detail with reference to the embodiments thereof, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A polyester resin composition, characterized by comprising a high acid value polyester resin and a low acid value polyester resin, wherein the acid value of the high acid value polyester resin is 47 to 60mgKOH/g, and the acid value of the low acid value polyester resin is 17 to 27mgKOH/g;
the high-acid-value polyester resin comprises the following preparation raw materials in parts by weight:
first polyol: 25-45 parts of a stabilizer; first polybasic acid: 45-65 parts of a solvent; a first amine compound: 2-20 parts of; first acid hydrolysis agent: 7-20 parts; first esterification catalyst: 0.01 to 0.15 portion; first crown ether: 0.1-5 parts; first curing accelerator: 0.01 to 0.15 portion;
the low-acid-value polyester resin comprises the following preparation raw materials in parts by weight:
second polyol: 20-45 parts of; second polybasic acid: 40-65 parts; a second amine compound: 2-20 parts of a solvent; second acid decomposing agent: 2-15 parts; second esterification catalyst: 0.01 to 0.15 portion; a second crown ether: 0.1-5 parts; a second curing accelerator: 0.01 to 0.1 portion.
2. The polyester resin composition according to claim 1, wherein the high acid value polyester resin has a melt viscosity of 1000 to 7000 mPa-s; the glass transition temperature is 60-75 ℃; the number average molecular weight is 2000-8000;
and/or the low acid value polyester resin has a melt viscosity of 4000 to 10000mPa & s; the glass transition temperature is 60-75 ℃; the number average molecular weight is 2000-8000.
3. The polyester resin composition according to claim 1, wherein the first amine compound is at least one selected from the group consisting of alanine, 2-aminobutyric acid, ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylenediamine, hexylenediamine, piperazine, and diaminodiphenyl ether.
4. The polyester resin composition according to claim 1, wherein the second amine compound is at least one selected from the group consisting of ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylenediamine, hexylenediamine, piperazine, diaminodiphenyl ether, N '-bis (2-hydroxyethyl) oxamide, N' -bis (2-hydroxyethyl) adipamide, caprolactam, and polyamide having a molecular weight of 500 to 4000.
5. The polyester resin composition according to claim 1, wherein the first crown ether and the second crown ether are independently selected from at least one of 15-crown-5, benzo 15-crown-5, 18-crown-6, dicyclohexyl-18-crown-6, dibenzo 18-crown-6.
6. The polyester resin composition according to claim 1, wherein the first polyol and the second polyol are independently selected from at least two of neopentyl glycol, ethylene glycol, diethylene glycol, methyl propylene glycol, 1, 2-propanediol, butanediol, hexanediol, 1, 4-cyclohexanedimethanol, isosorbide, 2-methyl-2, 4-pentanediol, ethylbutylpropanediol, trimethylolethane, trimethylolpropane, pentaerythritol.
7. Use of the polyester resin composition according to any one of claims 1 to 6 for the preparation of a coating.
8. A paint, characterized by comprising a component a and a component B, wherein the component a comprises the high acid value polyester resin of any one of claims 1 to 6, a first curing agent, a first pigment and filler, and a first auxiliary agent; the component B comprises the low-acid-value polyester resin as described in any one of claims 1 to 6, a second curing agent, a second pigment and filler and a second auxiliary agent;
preferably, the mass ratio of the component A to the component B is 1.
9. The coating of claim 8, wherein the first and second curatives are independently selected from triglycidyl isocyanurate or hydroxyalkylamide.
10. Use of the coating according to claim 8 or 9 in security doors, elevator doors, fire doors, aluminium ceilings, household appliances.
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| CN202211281390.5A CN115572523B (en) | 2022-10-19 | 2022-10-19 | Polyester resin composition, coating and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050176884A1 (en) * | 2002-12-30 | 2005-08-11 | Ju-Kil Lee | Water soluble thermosetting polyester resin composition and method of preparing the same |
| CN102010501A (en) * | 2010-10-27 | 2011-04-13 | 中国电器科学研究院 | Polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint and preparation method thereof |
| 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 |
| 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 |
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2022
- 2022-10-19 CN CN202211281390.5A patent/CN115572523B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050176884A1 (en) * | 2002-12-30 | 2005-08-11 | Ju-Kil Lee | Water soluble thermosetting polyester resin composition and method of preparing the same |
| CN102010501A (en) * | 2010-10-27 | 2011-04-13 | 中国电器科学研究院 | Polyester resin for beta-hydroxyalkylamide low temperature curing weather-resistant powder paint and preparation method thereof |
| 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 |
| 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 |
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