CN115572523B - Polyester resin composition, coating and application - Google Patents
Polyester resin composition, coating and application Download PDFInfo
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- CN115572523B CN115572523B CN202211281390.5A CN202211281390A CN115572523B CN 115572523 B CN115572523 B CN 115572523B CN 202211281390 A CN202211281390 A CN 202211281390A CN 115572523 B CN115572523 B CN 115572523B
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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
-
- 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
- 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
Abstract
The invention discloses a polyester resin composition, a coating and application. The polyester resin comprises a high acid value polyester resin and a low acid value polyester resin, wherein the high acid value polyester resin comprises the following preparation raw materials: a first polyol, a first polybasic acid, a first amine compound, a first acidolysis agent, 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 acidolysis 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 coating after curing still has excellent bending resistance and impact resistance at the low temperature of-20 ℃ after 3 months, so that the problem that the extinction performance and mechanical performance of the powder coating cannot be considered is solved.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a polyester resin composition, a coating and application.
Background
The mechanical properties of the coating sprayed by the powder coating have obvious time dependence and temperature dependence, and the thermal movement of the small molecule auxiliary agent in the coating causes the increase of the incompatibility of the matrix due to the relaxation or aging of the polyester resin which is the main substance of the film forming substance with the time, and the reasons cause the decrease of the mechanical properties of the coating. On the other hand, the temperature is reduced, so that the movement of a polymer chain is limited, the coating is directly brittle, the powder coating is difficult to meet the requirements of the secondary processing field even under the normal temperature condition, and the coating burst is more likely to occur in winter coating. With the transition of consumer aesthetic ideas, matt coatings are increasingly favored by consumers for their elegant and soft surface effect. The existing extinction method of the powder coating mainly comprises extinction by an extinction agent and dry-mixed extinction, and the extinction effect is realized by constructing a microscopically uneven rough surface in principle, and the extinction coating prepared by any method has the defect of poor mechanical property, so that the extinction coating is harder to realize the coating requirement of post-processing than the conventional high-gloss coating.
Chinese patent CN112521838A discloses a extinction transparent polyester composition, a preparation method and application thereof, and the synthetic high-low acid polyester resin has more formula monomer types, so that the disorder degree of a curing system is increased, and the transparent coating prepared from the bi-component polyester has higher light transmittance and lower gloss, but can only be positively punched by 50 cm. CN1053677658B discloses a polyester resin for TGIC cured high-toughness thermal transfer powder coating and a preparation method thereof, the powder coating prepared by adopting the polyester resin has higher glass transition temperature, the grain of a coating film after thermal transfer is clear, the coating film is not sticky to paper, the coating film has high toughness at-15 ℃, but the polyester is suitable for preparing high-gloss coating. In view of the foregoing, there are many problems in the field of powder coatings that are currently in need of a high-toughness matting powder coating.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the first aspect of the invention provides a polyester resin composition, and a powder coating prepared from the polyester resin composition provided by the invention has excellent flexibility, and the coating after curing still has excellent bending resistance and impact resistance after 3 months and at a low temperature of-20 ℃, so that the problem that the extinction performance and mechanical performance of the powder coating cannot be considered is solved.
The second aspect of the invention also provides a coating.
The third aspect of the invention also provides a use.
According to a first aspect of the present invention, there is provided a polyester resin composition comprising a high acid value polyester resin having an acid value of 47 to 60mgKOH/g and a low acid value polyester resin having an acid value of 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; first polyacid: 45-65 parts; a first amine compound: 2-20 parts; first acidolysis agent: 7-20 parts; a first esterification catalyst: 0.01 to 0.15 part; first crown ether: 0.1-5 parts; a first cure accelerator: 0.01 to 0.15 part;
the low acid value polyester resin comprises the following preparation raw materials in parts by weight:
second polyol: 20-45 parts; second polyacid: 40-65 parts; a second amine compound: 2-20 parts; second acidolysis agent: 2-15 parts; a second esterification catalyst: 0.01 to 0.15 part; second crown ether: 0.1-5 parts; a second cure accelerator: 0.01 to 0.1 part.
The polyester resin composition according to the embodiment of the invention has at least the following beneficial effects:
the powder coating prepared from the polyester resin composition provided by the invention has excellent flexibility, and the coating after curing still has excellent bending resistance and impact resistance at the low temperature of-20 ℃ after 3 months, so that the problem that the extinction performance and mechanical performance of the powder coating cannot be considered is solved. This is because the matting effect is achieved by the combination of the high acid value polyester and the low acid value polyester resin, and no additional matting agent is required; and secondly, the first amine compound and the second amine compound are introduced to form a polyamide-polyester random copolymerization structure, an amide bond provides an additional hydrogen bond effect, the high-low temperature resistance is better, and the coating is endowed with more excellent low-temperature mechanical properties. Meanwhile, the structural difference of polyester resin is increased due to the introduction of amide bonds, so that good extinction performance is provided for the powder coating; finally, the hydrogen bond and the inclusion effect of the crown ether and the amine compound are utilized to form the crown ether/amine inclusion compound firstly, the inclusion compound further participates in the polymerization reaction to form a crown ether/polyamide ring-type supermolecular structure, after the curing reaction of the resin, crown ether molecules still stably exist in a crosslinked network, and the lock structure effectively prevents the sliding and the breakage of molecular chains in the impact and bending processes, and greatly improves the toughness of the coating.
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, pentylene diamine, hexamethylenediamine, piperazine, diaminodiphenyl ether.
According to some embodiments of the invention, the second amine-based compound is selected from at least one of ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylene diamine, hexylenediamine, piperazine, diaminodiphenyl ether, N '-bis (2-hydroxyethyl) oxamide, N' -bis (2-hydroxyethyl) adipamide, caprolactam, polyamides with molecular weights of 500 to 4000.
According to some embodiments of the invention, 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.
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-naphthalene dicarboxylic acid, 1, 4-cyclohexane dicarboxylic acid, succinic acid, adipic acid.
According to some embodiments of the invention, the first and second acid hydrolysis agents 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 and second esterification catalysts 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, dibutyl tin dilaurate, stannous octoate, dibutyl tin di (dodecylthio), dibutyl tin diacetate.
According to some embodiments of the invention, the zinc catalyst comprises at least one of zinc iso-octoate, 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 triphenylphosphine bromide, triphenylphosphine.
According to some embodiments of the invention, the method for preparing the high acid value polyester resin comprises the following steps:
s1, adding a first amine compound and 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 first polyol, first polybasic acid and first esterification catalyst in the step S1, heating to perform esterification reaction, gradually heating to 230-250 ℃, and reacting for 10-13 hours, wherein the acid value reaches 6-20 mgKOH/g;
s3, adding a first acidolysis agent into the step S2, and reacting for 1-4 hours at 220-235 ℃ until the acid value reaches 65-75 mgKOH/g; vacuumizing for 0.5-5 hours, wherein the acid value reaches 47-60 mgKOH/g, and adding a first curing accelerator to obtain the high acid value polyester resin.
According to some embodiments of the invention, the method for preparing the low acid value polyester resin comprises the following steps:
s11, adding a second amine compound and 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 polybasic acid 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, wherein the acid value reaches 6-20 mgKOH/g;
s13, adding a second acidolysis agent into the step S11, and reacting for 1-4 hours at 220-235 ℃ until the acid value reaches 30-45 mgKOH/g; vacuumizing for 0.5-5 hours, wherein the acid value reaches 17-27 mgKOH/g, and adding a second curing accelerator to obtain the low acid value polyester resin.
A second aspect of the embodiment of the present invention provides the use of the polyester resin composition described above in 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 1:0.4-1.5.
According to some embodiments of the invention, the first and second curing agents are independently selected from triglycidyl isocyanurate or hydroxyalkylamide.
According to some embodiments of the invention, the first pigment and the second pigment are independently selected from carbon black, iron oxide yellow, iron oxide red, phthalocyanine green, titanium dioxide, barium sulfate, mica powder, calcium carbonate, silica, talc.
According to some embodiments of the invention, the first auxiliary agent and the second auxiliary agent are independently selected from leveling agents, brightening agents, benzoin, texturing agents, antioxidants.
The fourth aspect of the invention provides the application of the paint in burglary-resisting doors, elevator doors, fireproof 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 embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the embodiments, but the present invention is not limited to these embodiments.
The reagents, methods and apparatus employed in the present invention, unless otherwise specified, are all conventional in the art.
Acid number, 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, the preparation methods of the high acid value polyester resin and the low acid value polyester resin are 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 preserving heat for 1h;
s2, sequentially adding first polyol, first polybasic acid and first esterification catalyst, continuously heating to 180 ℃ for polycondensation and dehydration, gradually heating to 240 ℃ for a total reaction for 13 hours, wherein the acid value reaches 20mgKOH/g;
s3, adding a first acidolysis agent into the step S2, reacting for 4 hours at 220 ℃, wherein the acid value reaches 70mgKOH/g, vacuumizing (the vacuum degree is-0.096 MPa) for about 0.5-5 hours, wherein the acid value reaches 53mgKOH/g, and adding a first curing accelerator to obtain the high acid value polyester resin;
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 ℃ for polycondensation and dehydration, gradually heating to 240 ℃ for a total reaction for 12 hours, wherein the acid value reaches 18mgKOH/g;
s13, adding a second acidolysis agent into the step S12, reacting for 1-4 hours at 220-235 ℃, wherein the acid value reaches 40mgKOH/g, vacuumizing (the vacuum degree is-0.096 MPa) for about 0.5-5 hours, wherein 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 preparation of which is the same as example 1, and the component contents are shown in tables 1 and 2.
Table 1 component content (parts) of the high acid value polyester resins of examples 1 to 5
Table 2 component content (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 component contents and the production 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 component contents and the production 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, the component contents and the production method of which are the same as those of example 1, except that the high acid value polyester resin and the low acid value polyester resin in comparative example 1 lack the first amine compound and the second amine compound.
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, the component contents and the production method of which are the same as those of example 1, except that the high acid value polyester resin and the low acid value polyester resin in comparative example 1 lack the first crown ether and the second crown ether.
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, the component contents and the production method of which are the same as those of example 1, except that the high acid value polyester resin and the low acid value polyester resin in comparative example 1 lack a first amine compound and a first crown ether; a second amine compound and a second crown ether.
Performance testing
The polyester resins of examples 1 to 4 and comparative examples 1 to 5 were prepared into paints, specifically, the high acid value polyester resins and the low acid value polyester resins of examples 1 to 4 and comparative examples 1 to 5 were respectively and uniformly mixed with TGIC, titanium pigment, barium sulfate, leveling agent and benzoin according to the amounts of table 3, respectively, melted by a screw extruder, respectively extruded, tableted, crushed, and then crushed and sieved to prepare A, B component powder. A, B component was then combined as 1:1, uniformly mixing, spraying the mixture on a metal plate with the surface degreased and derusted by adopting an electrostatic spray gun, curing the mixture for 10 minutes at 200 ℃, and then carrying out various performance tests. Wherein, impact properties were tested at normal temperature and after 90 days of standing at normal temperature, bending properties were tested at normal temperature, -20 ℃ and after 90 days of standing at normal temperature, the test results are shown in table 4, wherein, the surface appearance was visually examined, gloss was measured according to the prescribed test of GB/T9754-2007, 60 ° incidence angle test was adopted, impact was measured according to the T/GDTL 004-2009 standard, and T-bend was measured according to the ncaii-19 standard.
TABLE 3 component content (parts) of coating
Table 4 data for examples 1 to 4 and comparative examples 1 to 5
As can be seen from the test results in Table 4, the polyester resin compositions provided by the present invention have excellent bending resistance and impact resistance after curing at a low temperature of-20℃for 3 months, while having good matting properties, as compared with comparative examples 1 to 5.
The present invention has been described in detail with reference to the above embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. A polyester resin composition comprising a high acid value polyester resin having an acid value of 47 to 60mgKOH/g and a low acid value polyester resin having an acid value of 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; first polyacid: 45-65 parts; a first amine compound: 2-20 parts; first acidolysis agent: 7-20 parts; a first esterification catalyst: 0.01 to 0.15 part; first crown ether: 0.1-5 parts; a first cure accelerator: 0.01 to 0.15 part;
the low acid value polyester resin comprises the following preparation raw materials in parts by weight:
second polyol: 20-45 parts; second polyacid: 40-65 parts; a second amine compound: 2-20 parts; second acidolysis agent: 2-15 parts; a second esterification catalyst: 0.01 to 0.15 part; second crown ether: 0.1-5 parts; a second cure accelerator: 0.01 to 0.1 part;
the first amine compound is at least one selected from alanine, 2-aminobutyric acid, ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylene diamine, hexamethylenediamine, piperazine and diaminodiphenyl ether;
the second amine compound is at least one selected from ethanolamine, diethanolamine, ethylenediamine, propylenediamine, butylenediamine, pentylene diamine, hexamethylenediamine, piperazine, diaminodiphenyl ether, N '-di (2-hydroxyethyl) oxamide, N' -di (2-hydroxyethyl) adipamide, caprolactam and polyamide with molecular weight of 500-4000;
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.
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 melt viscosity of the low acid value polyester resin is 4000 to 10000 mPa.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 and second polyols 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.
4. Use of the polyester resin composition according to any one of claims 1 to 3 for preparing a coating.
5. A coating comprising an a component and a B component, the a component comprising the high acid number polyester resin of any one of claims 1 to 3, a first curing agent, a first pigment filler, and a first auxiliary agent; the component B comprises the low acid value polyester resin of any one of claims 1 to 3, a second curing agent, a second pigment filler and a second auxiliary agent.
6. The coating according to claim 5, wherein the mass ratio of the A component to the B component is 1:0.4-1.5.
7. The coating of claim 5, wherein the first and second curing agents are independently selected from triglycidyl isocyanurate or hydroxyalkylamide.
8. Use of the coating according to any one of claims 5-7 in burglary doors, elevator doors, fire doors, aluminum ceilings, household appliances.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100524256B1 (en) * | 2002-12-30 | 2005-10-28 | 주식회사 디피아이 | water soluble Thermosetting polyester resin composition and method of preparing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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