CN113336924A - Flame-retardant polyester resin and preparation method thereof - Google Patents
Flame-retardant polyester resin and preparation method thereof Download PDFInfo
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- CN113336924A CN113336924A CN202110824207.0A CN202110824207A CN113336924A CN 113336924 A CN113336924 A CN 113336924A CN 202110824207 A CN202110824207 A CN 202110824207A CN 113336924 A CN113336924 A CN 113336924A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/52—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/02—Halogenated hydrocarbons
- C08K5/03—Halogenated hydrocarbons aromatic, e.g. C6H5-CH2-Cl
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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Abstract
The invention discloses a flame-retardant polyester resin and a preparation method thereof, relating to the technical field of coatings; the flame-retardant polyester resin comprises the following raw materials in parts by weight: 5-10 parts of camellia oil, 10-18 parts of fumaric acid, 13-20 parts of polyvinyl acetal, 3-6 parts of chlorinated paraffin, 3-10 parts of pentabromoethyl benzene, 6-12 parts of aluminum hydroxide and the balance of an organic solvent. The invention has better flame retardant effect, oxygen-containing parameter and impact effect.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a flame-retardant polyester resin and a preparation method thereof.
Background
The powder coating is 100% solid powder without organic solvent, which is different from oil-based coating and water-based coating, and the powder coating is a novel environment-friendly coating which does not use solvent or water as a dispersion medium but uses air as a dispersion medium, is uniformly coated on the surface of a workpiece and forms a coating film with special purpose after being heated. The powder coating has the advantages of no VOC, environmental protection, energy conservation, high construction efficiency, wide application range and the like, and gradually replaces organic solvent type coatings with the advantages of economy, environmental protection, high efficiency, excellent performance and the like, thereby becoming an important development direction in the coating industry and keeping a faster growth rate all the time. The polyester powder coating is widely applied to the coating field due to the characteristics of excellent durability, decoration, processing formability and the like.
The traditional polyester resin basically has no flame retardant property or has extremely poor flame retardant property, and in order to solve the technical problem, the flame retardant polyester resin and the preparation method thereof are provided.
Disclosure of Invention
The invention aims to provide a flame-retardant polyester resin and a preparation method thereof, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the flame-retardant polyester resin comprises the following raw materials in parts by weight: 5-10 parts of camellia oil, 10-18 parts of fumaric acid, 13-20 parts of polyvinyl acetal, 3-6 parts of chlorinated paraffin, 3-10 parts of pentabromoethyl benzene, 6-12 parts of aluminum hydroxide and the balance of an organic solvent.
As a further scheme of the invention: the flame-retardant polyester resin comprises the following raw materials in parts by weight: 7-8 parts of camellia oil, 12-16 parts of fumaric acid, 15-18 parts of polyvinyl acetal, 4-5 parts of chlorinated paraffin, 5-8 parts of pentabromoethyl benzene, 8-10 parts of aluminum hydroxide and the balance of an organic solvent.
As a still further scheme of the invention: the flame-retardant polyester resin comprises the following raw materials in parts by weight: camellia oil 7.5 parts, fumaric acid 14 parts, polyvinyl acetal 16.5 parts, chlorinated paraffin 4.5 parts, pentabromoethyl benzene 6.5 parts, aluminum hydroxide 9.5 parts, and the balance of organic solvent.
As a still further scheme of the invention: the organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Another object of the present invention is to provide a method for preparing a body, comprising the steps of:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 80-100 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) the temperature in the reaction kettle is increased to 150 ℃., the prepared camellia oil, fumaric acid, polyvinyl acetal and chlorinated paraffin are added, the reaction is carried out for 1.5 to 2.0 hours under the condition of heat preservation, the reaction kettle is vacuumized, the temperature is continuously increased to 200 ℃, and the heat preservation is carried out for 15 to 30 minutes;
(3) reducing the temperature to 140-160 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.5-2 hours, cooling to 35-45 ℃, and discharging to obtain the flame-retardant polyester resin.
As a further scheme of the invention: a preparation method of flame-retardant polyester resin comprises the following steps:
adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 85-95 ℃ at a constant speed, and then slowing down the temperature raising speed;
the temperature in the reaction kettle is increased to 140 ℃ for 130-;
reducing the temperature to 145-155 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.6-1.8 hours, reducing the temperature to 38-42 ℃, and discharging to obtain the flame-retardant polyester resin.
As a still further scheme of the invention: a preparation method of flame-retardant polyester resin comprises the following steps:
adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 90 ℃ at a constant speed, and then slowing down the temperature raising speed;
heating the temperature in the reaction kettle to 135 ℃, adding the prepared camellia oil, fumaric acid, polypropylene alcohol acetal and chlorinated paraffin, keeping the temperature for reaction for 1.7 hours, vacuumizing the reaction kettle, continuously heating to 190 ℃, and keeping the temperature for 23 minutes;
reducing the temperature to 150 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.7 hours, continuously reducing the temperature to 40 ℃, and discharging to obtain the flame-retardant polyester resin.
As a still further scheme of the invention: and (3) heating the temperature in the reaction kettle to 120-150 ℃, adding the prepared camellia oil, fumaric acid, polyvinyl acetal and chlorinated paraffin, carrying out heat preservation reaction for 1.5-2.0 hours, vacuumizing the reaction kettle, keeping the rotating speed in the reaction kettle at 50-100 revolutions, stirring and mixing, continuously heating to 180-200 ℃, and preserving heat for 15-30 minutes.
Compared with the prior art, the invention has the beneficial effects that: the interaction among the aluminum hydroxide, the pentabromoethylbenzene and other components improves the oxygen index and the impact property of the invention; meanwhile, the aluminum hydroxide and the pentabromoethylbenzene can provide the needed flame retardant effect under the condition of extremely low content, so that other performances are ensured.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
The flame-retardant polyester resin comprises the following raw materials in parts by weight: 10 parts of camellia oil, 18 parts of fumaric acid, 20 parts of polyvinyl acetal, 6 parts of chlorinated paraffin, 10 parts of pentabromoethyl benzene, 12 parts of aluminum hydroxide and the balance of an organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 95 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 140 ℃, adding the prepared camellia oil, fumaric acid, polypropylene acetal and chlorinated paraffin, keeping the temperature for reaction for 1.8 hours, keeping the rotating speed of the reaction kettle at 100 revolutions, vacuumizing the reaction kettle, continuously heating to 195 ℃, and keeping the temperature for 26 minutes;
(3) reducing the temperature to 155 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 2 hours, reducing the temperature to 45 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Example 2
The flame-retardant polyester resin comprises the following raw materials in parts by weight: 5 parts of camellia oil, 10 parts of fumaric acid, 13 parts of polyvinyl acetal, 3 parts of chlorinated paraffin, 3 parts of pentabromoethyl benzene, 6 parts of aluminum hydroxide and the balance of an organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 85 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 130 ℃, adding the prepared camellia oil, fumaric acid, polypropylene acetal and chlorinated paraffin, keeping the temperature for reaction for 1.6 hours, keeping the rotating speed of the reaction kettle at 50 revolutions, vacuumizing the reaction kettle, continuously heating to 185 ℃, and keeping the temperature for 20 minutes;
(3) reducing the temperature to 145 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.5 hours, reducing the temperature to 35 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Example 3
The flame-retardant polyester resin comprises the following raw materials in parts by weight: 8 parts of camellia oil, 16 parts of fumaric acid, 18 parts of polyvinyl acetal, 5 parts of chlorinated paraffin, 8 parts of pentabromoethyl benzene, 10 parts of aluminum hydroxide and the balance of an organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 95 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 140 ℃, adding the prepared camellia oil, fumaric acid, polypropylene acetal and chlorinated paraffin, keeping the temperature for reaction for 1.8 hours, keeping the rotating speed of the reaction kettle at 75 revolutions, vacuumizing the reaction kettle, continuously heating to 195 ℃, and keeping the temperature for 26 minutes;
(3) reducing the temperature to 155 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.8 hours, reducing the temperature to 42 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Example 4
The flame-retardant polyester resin comprises the following raw materials in parts by weight: 7 parts of camellia oil, 12 parts of fumaric acid, 15 parts of polyvinyl acetal, 4 parts of chlorinated paraffin, 5 parts of pentabromoethyl benzene, 8 parts of aluminum hydroxide and the balance of an organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 85 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 130 ℃, adding the prepared camellia oil, fumaric acid, polypropylene alcohol acetal and chlorinated paraffin, keeping the temperature for reaction for 1.6 hours, vacuumizing the reaction kettle, continuously heating to 185 ℃, and keeping the temperature for 20 minutes;
(3) reducing the temperature to 145 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.6 hours, reducing the temperature to 38 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Example 5
The flame-retardant polyester resin comprises the following raw materials in parts by weight: camellia oil 7.5 parts, fumaric acid 14 parts, polyvinyl acetal 16.5 parts, chlorinated paraffin 4.5 parts, pentabromoethyl benzene 6.5 parts, aluminum hydroxide 9.5 parts, and the balance of organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 90 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 135 ℃, adding the prepared camellia oil, fumaric acid, polypropylene alcohol acetal and chlorinated paraffin, keeping the temperature for reaction for 1.7 hours, vacuumizing the reaction kettle, continuously heating to 190 ℃, and keeping the temperature for 23 minutes;
(3) reducing the temperature to 150 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.7 hours, continuously reducing the temperature to 40 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Comparative example 1
The flame-retardant polyester resin comprises the following raw materials in parts by weight: camellia oil 7.5 parts, fumaric acid 14 parts, polyvinyl acetal 16.5 parts, chlorinated paraffin 4.5 parts, pentabromoethyl benzene 6.5 parts, aluminum hydroxide 9.5 parts, and the balance of organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 90 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 135 ℃, adding the prepared camellia oil, fumaric acid, polypropylene alcohol acetal and chlorinated paraffin, keeping the temperature for reaction for 1.7 hours, vacuumizing the reaction kettle, continuously heating to 190 ℃, and keeping the temperature for 23 minutes;
(3) reducing the temperature to 150 ℃, adding the prepared pentabromoethyl benzene, then keeping the temperature and stirring uniformly, continuously reducing the temperature to 40 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Comparative example 2
The flame-retardant polyester resin comprises the following raw materials in parts by weight: camellia oil 7.5 parts, fumaric acid 14 parts, polyvinyl acetal 16.5 parts, chlorinated paraffin 4.5 parts, pentabromoethyl benzene 6.5 parts, aluminum hydroxide 9.5 parts, and the balance of organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 90 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 135 ℃, adding the prepared camellia oil, fumaric acid, polypropylene alcohol acetal and chlorinated paraffin, keeping the temperature for reaction for 1.7 hours, vacuumizing the reaction kettle, continuously heating to 190 ℃, and keeping the temperature for 23 minutes;
(3) reducing the temperature to 150 ℃, adding the prepared aluminum hydroxide, then keeping the temperature and stirring uniformly, continuously reducing the temperature to 40 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Comparative example 3
The flame-retardant polyester resin comprises the following raw materials in parts by weight: camellia oil 7.5 parts, fumaric acid 14 parts, polyvinyl acetal 16.5 parts, chlorinated paraffin 4.5 parts, pentabromoethyl benzene 6.5 parts, aluminum hydroxide 9.5 parts, and the balance of organic solvent.
The preparation method of the flame-retardant polyester resin comprises the following steps:
(1) adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 90 ℃ at a constant speed, and then slowing down the temperature raising speed;
(2) heating the temperature in the reaction kettle to 135 ℃, adding prepared fumaric acid, polypropylene acetal and chlorinated paraffin, keeping the temperature for reaction for 1.7 hours, vacuumizing the reaction kettle, continuously heating to 190 ℃, and keeping the temperature for 23 minutes;
(3) reducing the temperature to 150 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, then keeping the temperature and stirring uniformly, continuously reducing the temperature to 40 ℃, and discharging to obtain the flame-retardant polyester resin.
The organic solvent is one or a mixture of more of alcohol solvent, xylene or toluene.
Performance test
The flame-retardant polyester resins prepared in examples 1 to 5 of the present invention and comparative examples 1 to 3 were prepared as follows:
and respectively mixing the materials uniformly according to the formula of the transparent powder coating, respectively extruding, tabletting and crushing the materials by using a double-screw extruder, and then crushing and sieving the tablets to prepare the powder coating. The powder coating is sprayed on the medium-density fiberboard substrate subjected to surface treatment by adopting an electrostatic spray gun (the thickness of the coating is 30-60 mu m), and the coating is cured at 140 ℃/15min to obtain the coating.
The detection of the coating index is based on GB/T21776 2008 'Standard guide for powder coating and coating detection'; the flame retardant property and the oxygen index of the prepared sample plate are classified according to GB 8624 and 2012 'fire performance of building materials and products'; and the respective test data are recorded in table 1 below.
TABLE 1
| Item | Flame retardant rating | Oxygen index (%) | Impact Property (50cm) | Smearing performance |
| Example 1 | B1 | 95 | Positive impact passing through | Leveling |
| Example 2 | B1 | 95 | Positive impact passing through | Leveling |
| Example 3 | B1 | 96 | Positive impact passing through | Leveling |
| Example 4 | B1 | 96 | Positive impact passing through | Leveling |
| Example 5 | B1 | 96 | Positive impact passing through | Leveling |
| Comparative example 1 | B2 | 75 | Positive impact fails to pass | Leveling |
| Comparative example 2 | B2 | 80 | Positive impact fails to pass | Leveling |
| Comparative example 3 | B2 | 88 | Positive impact fails to pass | Is substantially flat |
As can be seen by comparing example 5, comparative example 1 and comparative example 2, comparative example 1 is different from example 5 in that aluminum hydroxide is not contained and other conditions are the same; comparative example 2 differs from example 5 in that pentabromoethylbenzene is not contained and other conditions are the same; however, the comparative examples 1 and 2 not only reduce the flame retardant grade, but also reduce the oxygen index and the impact performance, and the aluminum hydroxide and the pentabromoethyl benzene only have the flame retardant effect, so that the interaction between the aluminum hydroxide and the pentabromoethyl benzene and other components improves the oxygen index and the impact performance of the flame retardant coating; meanwhile, the aluminum hydroxide and the pentabromoethylbenzene can provide the needed flame retardant effect under the condition of extremely low content, so that other performances are ensured. In the absence of camellia oil, the flame retardance, oxygen index and impact performance of the camellia oil are reduced in comparative example 3, and the interaction among the components in the application is further proved, so that the performance is improved.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above 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 (8)
1. The flame-retardant polyester resin is characterized by comprising the following raw materials in parts by weight: 5-10 parts of camellia oil, 10-18 parts of fumaric acid, 13-20 parts of polyvinyl acetal, 3-6 parts of chlorinated paraffin, 3-10 parts of pentabromoethyl benzene, 6-12 parts of aluminum hydroxide and the balance of an organic solvent.
2. The flame retardant polyester resin according to claim 1, wherein the flame retardant polyester resin comprises the following raw materials in parts by weight: 7-8 parts of camellia oil, 12-16 parts of fumaric acid, 15-18 parts of polyvinyl acetal, 4-5 parts of chlorinated paraffin, 5-8 parts of pentabromoethyl benzene, 8-10 parts of aluminum hydroxide and the balance of an organic solvent.
3. The flame retardant polyester resin according to claim 1, wherein the flame retardant polyester resin comprises the following raw materials in parts by weight: camellia oil 7.5 parts, fumaric acid 14 parts, polyvinyl acetal 16.5 parts, chlorinated paraffin 4.5 parts, pentabromoethyl benzene 6.5 parts, aluminum hydroxide 9.5 parts, and the balance of organic solvent.
4. The flame-retardant polyester resin according to claim 1, wherein the organic solvent is one or a mixture of alcohol solvents, xylene or toluene.
5. The process for preparing the flame retardant polyester resin according to any one of claims 1 to 4, comprising the steps of:
adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 80-100 ℃ at a constant speed, and then slowing down the temperature raising speed;
the temperature in the reaction kettle is increased to 150 ℃., the prepared camellia oil, fumaric acid, polyvinyl acetal and chlorinated paraffin are added, the reaction is carried out for 1.5 to 2.0 hours under the condition of heat preservation, the reaction kettle is vacuumized, the temperature is continuously increased to 200 ℃, and the heat preservation is carried out for 15 to 30 minutes;
reducing the temperature to 140-160 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.5-2 hours, cooling to 35-45 ℃, and discharging to obtain the flame-retardant polyester resin.
6. The method for preparing the flame-retardant polyester resin according to claim 1, comprising the steps of:
adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 85-95 ℃ at a constant speed, and then slowing down the temperature raising speed;
the temperature in the reaction kettle is increased to 140 ℃ for 130-;
reducing the temperature to 145-155 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.6-1.8 hours, reducing the temperature to 38-42 ℃, and discharging to obtain the flame-retardant polyester resin.
7. The method for preparing the flame-retardant polyester resin according to claim 1, comprising the steps of:
adding an organic solvent into the reaction kettle, uniformly stirring, raising the temperature to 90 ℃ at a constant speed, and then slowing down the temperature raising speed;
heating the temperature in the reaction kettle to 135 ℃, adding the prepared camellia oil, fumaric acid, polypropylene alcohol acetal and chlorinated paraffin, keeping the temperature for reaction for 1.7 hours, vacuumizing the reaction kettle, continuously heating to 190 ℃, and keeping the temperature for 23 minutes;
reducing the temperature to 150 ℃, adding the prepared pentabromoethyl benzene and aluminum hydroxide, uniformly stirring, keeping the temperature for 1.7 hours, continuously reducing the temperature to 40 ℃, and discharging to obtain the flame-retardant polyester resin.
8. The preparation method of the flame-retardant polyester resin as claimed in claim 1, wherein the temperature in the reaction kettle is up to 120-150 ℃, the prepared camellia oil, fumaric acid, polyallylal and chlorinated paraffin are added, the reaction is carried out for 1.5-2.0 hours under the condition of heat preservation, the reaction kettle is vacuumized, the rotation speed in the reaction kettle is kept at 50-100 revolutions, the stirring and mixing are carried out, the temperature is continuously increased to 180-200 ℃, and the heat preservation is carried out for 15-30 minutes.
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Application publication date: 20210903 |