CN113502035A - Halogen-free flame-retardant polyester composite material and preparation method thereof - Google Patents
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 63
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229920000728 polyester Polymers 0.000 title claims abstract description 43
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000002667 nucleating agent Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 3
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000008187 granular material Substances 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 6
- VOWPVJACXJNHBC-UHFFFAOYSA-N methyl diphenyl phosphate Chemical compound C=1C=CC=CC=1OP(=O)(OC)OC1=CC=CC=C1 VOWPVJACXJNHBC-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 3
- 239000012757 flame retardant agent Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000006068 polycondensation reaction Methods 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 10
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical group C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- MRXXLYIVBJVALD-UHFFFAOYSA-N 1-phenylethyl dihydrogen phosphate Chemical compound OP(=O)(O)OC(C)C1=CC=CC=C1 MRXXLYIVBJVALD-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910001377 aluminum hypophosphite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- CQYBWJYIKCZXCN-UHFFFAOYSA-N diethylaluminum Chemical compound CC[Al]CC CQYBWJYIKCZXCN-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 229920000831 ionic polymer Polymers 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical class O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 150000007519 polyprotic acids Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G79/00—Macromolecular compounds obtained by reactions forming a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon with or without the latter elements in the main chain of the macromolecule
- C08G79/02—Macromolecular compounds obtained by reactions forming a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon with or without the latter elements in the main chain of the macromolecule a linkage containing phosphorus
- C08G79/04—Phosphorus linked to oxygen or to oxygen and carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/22—Halogen free composition
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a halogen-free flame-retardant polyester composite material and a preparation method thereof, belonging to the technical field of polymer composite materials. The material is prepared from the following raw materials in percentage by mass: 59-94.5% of polyester PBT; 5-40% of a polyphosphonate flame retardant; 0.5-1% of nucleating agent; wherein, the polyphosphonate flame retardant has the following structural formula:
and n in the structural formula is a positive integer of 21-50. The main chain structure of the polyphosphonate flame retardant used in the invention contains benzene rings, the polyphosphonate flame retardant is similar to the polyester structure and has good compatibility with polyester, and the composite material designed by the invention is easy to process and has little influence on the mechanical properties of the composite material.
Description
Technical Field
The invention relates to a flame-retardant polyester composite material, belongs to the technical field of polymer composite materials, and particularly relates to a halogen-free flame-retardant polyester composite material and a preparation method thereof.
Background
The polyester resin is a general name of a high molecular compound formed by polycondensing polyol and polybasic acid, has the characteristics of high mechanical strength, abrasion resistance, oil resistance, good electrical insulation property and the like, particularly polybutylene terephthalate (PBT) is one of five general engineering plastics, has good heat resistance, weather resistance, good dimensional stability and extremely excellent chemical resistance, and is widely applied to the fields of electronics, electric appliances, communication equipment, optical equipment and the like.
Therefore, it is required that the polyester should have flame retardancy because of its wide application, particularly in the field of electronic and electric appliances. Whereas most of the flame retardants currently used in polyesters are known to be halogen-containing, typically bromine. It is clear that halogenated flame retardants are not desirable and that polyester composites containing halogenated flame retardants exhibit poor color stability upon aging with ultraviolet light.
Therefore, in view of the negative effects on the environment and human health caused by the large amount of brominated flame retardants, there is an urgent need to develop halogen-free flame retardants that not only provide good flame retardancy, but also exhibit comparable or even improved mechanical properties for polyester applications.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a halogen-free flame-retardant polyester composite material and a preparation method thereof, wherein the polyphosphonate flame retardant in the composite material has good compatibility and dispersibility with polyester PBT, and the prepared composite material has high mechanical strength, good flame retardance and good product size stability.
In order to realize the technical purpose, the invention discloses a halogen-free flame-retardant polyester composite material which is prepared from the following raw material components in percentage by mass:
59-94.5% of polyester PBT;
5-40% of a polyphosphonate flame retardant;
0.5-1% of nucleating agent;
wherein the polyphosphonate flame retardant has the following structural formula:
and n in the structural formula is a positive integer of 21-50.
Preferably, the nucleating agent used in the present invention is one or a combination of at least two of sodium carbonate, sodium bicarbonate, sodium acetate or an ionic polymer.
Further, the tensile strength of the halogen-free flame-retardant polyester composite material is 40-75 MPa, and the limiting oxygen index is 25-40%.
Further, the polyphosphonate flame retardant is prepared by one-step melt polycondensation reaction of methyl diphenyl phosphate and bisphenol S.
Specifically, adding methyl diphenyl phosphate and bisphenol S into a reaction device according to a certain proportion, adding a catalyst sodium metaaluminate under the protection of inert gas, slowly heating to 120-150 ℃ for reaction for 1-3 h, continuously heating to 170-190 ℃ for reaction for 2-5 h, then reacting for 3-5 h under a reduced pressure state, cooling to room temperature, and performing purification treatment to obtain a polyphosphonate flame retardant; and the addition amount of the catalyst sodium metaaluminate is 1-5% of the weight of the bisphenol S.
Furthermore, the molar ratio of the methyl diphenyl phosphate to the bisphenol S is (1-1.1): 1.
In the present invention, the molar ratio of the methylbenzyl phosphate to the bisphenol S is preferably 1.05: 1.
In addition, the invention also discloses a preparation method of the halogen-free flame-retardant polyester composite material, which comprises the following steps:
1) uniformly mixing polyester PBT, polyphosphonate flame retardant and nucleating agent according to a formula to obtain a mixed base material;
2) putting the mixed base material obtained in the step 1) into a co-rotating double-screw extruder to be processed to obtain granules;
3) and (3) carrying out molding processing on the granules obtained in the step 2) by using an injection molding machine to obtain the flame-retardant material.
Further, in the step 2), the processing temperature is 230-255 ℃, and the rotating speed is set to be 160-220 r/min.
Further, in the step 3), the injection molding temperature is 235-260 ℃.
Further, in the step 1), the polyester PBT resin is dried for 3-5 hours in an air drying oven at 100 ℃.
Further, in the step 1), the polyphosphonate flame retardant is fully ball-milled for 20min in a ball mill.
Advantageous effects
1. The invention adopts the polyphosphonate flame retardant, which not only has good high-temperature stability, but also is environment-friendly and pollution-free.
2. The composite material designed by the invention has high mechanical strength, good flame retardance and good product dimensional stability.
Drawings
FIG. 1 is an infrared spectrum of a polyphosphonate flame retardant prepared according to an embodiment of the present invention;
FIG. 2 is a thermal decomposition spectrum of a polyphosphonate flame retardant prepared according to an example of the present invention;
FIG. 3 is a carbon layer electron micrograph of comparative example 1 and example 2 of the present invention after burning.
Detailed Description
In order to better explain the invention, the following further illustrate the main content of the invention in connection with specific examples, but the content of the invention is not limited to the following examples.
Example 1
This example discloses the preparation of a polyphosphonate flame retardant:
26.04g of methyl diphenyl phosphate and 25g of bisphenol S are added into a four-neck flask provided with an electromechanical stirrer and a reduced pressure distillation device, 0.25g of catalyst sodium metaaluminate (the mass of the catalyst is 1 percent of that of the bisphenol S) is added, nitrogen is introduced under the stirring state, the reaction is carried out for 1 hour at 140 ℃, the reaction is carried out for 3 hours at 180 ℃, the generated micromolecular phenol is separated out in the reaction process, and then the reaction is continued for 4 hours under the reduced pressure state.
After the reaction is finished, crushing the solid crude product obtained after the reaction, fully stirring for 3 hours in hot water at 60 ℃, filtering while hot, collecting a filter cake, drying the filter cake in an oven at 50 ℃ for 12 hours in vacuum, and drying to obtain the solid product polyphosphonate.
The synthetic route of the above reaction is as follows:
wherein the polyphosphonate has the structural characterization shown in FIG. 1.
Specifically, the infrared analysis spectrogram of the polyphosphonate is shown in figure 1, and can be known by combining figure 1 to be 1258cm-1And 1196cm-1Is a characteristic absorption peak of P ═ O, 918cm-1Is the characteristic absorption peak of P-O-C (C on the benzene ring).
As can be seen from FIG. 2, the thermal decomposition temperature of the polyphosphonate flame retardant is as high as 378 ℃. And in the structure of the polyphosphonate flame retardant, the structure of the polyphosphonate flame retardant contains P and S elements, so that a synergistic effect can be achieved, and a flame retardant effect is achieved.
Example 2
The embodiment discloses a preparation method of a halogen-free flame-retardant polyester composite material, which comprises the following steps:
(1) 10g of the polyphosphonate flame retardant prepared in the example 1, 0.5g of the nucleating agent and 89.5g of the polyester PBT resin are fully mixed to obtain a mixed base material, and then the mixed base material is placed in a co-rotating double-screw extruder to be processed and granulated to obtain granules, wherein the temperature range of the double-screw extruder is 230-255 ℃, and the rotating speed of the double-screw extruder is 160-220 r/min.
(2) And (2) taking the granules obtained in the step (1) to perform molding processing in an injection molding machine to obtain the composite material, wherein the temperature of the injection molding machine is 235-260 ℃.
Example 3
This example is different from example 2 above in that the amount of the polyphosphonate flame retardant added was 15g, the amount of the polyester PBT resin was 84.5g, and the rest was the same.
Example 4
This example differs from example 2 above in that the amount of polyphosphonate flame retardant added was 20g and the amount of polyester PBT resin was 79.5g, all other things remaining the same.
Example 5
This example differs from example 2 above in that the amount of polyphosphonate flame retardant added was 25g and the amount of polyester PBT resin was 74.5g, all other things remaining the same.
Example 6
This example differs from example 2 above in that the polyphosphonate flame retardant was added in an amount of 30g and the polyester PBT resin in an amount of 69.5g, all other things remaining the same.
Example 7
This example differs from example 2 above in that 35g of polyphosphonate flame retardant was added and 64.5g of polyester PBT resin was added, all the other things remaining the same.
Example 8
This example differs from example 2 above in that the amount of polyphosphonate flame retardant added was 40g and the amount of polyester PBT resin was 59.5g, all other things remaining the same.
Comparative example 1
This example differs from example 2 above in that no polyphosphonate flame retardant was added, all else remaining the same.
Comparative example 2
This example differs from example 2 above in that the same proportion of a built-up alkylated hypophosphite system, such as diethyl aluminum hypophosphite, is added.
Comparative example 3
This example differs from example 2 above in that the same proportion of melamine polyphosphate system, such as melamine polyphosphate (MPP), is added.
Application and testing of the materials: the tensile properties of the products obtained in the above examples and comparative examples were measured by using a universal tester (the tensile rate was 5mm/min, according to GB/T2568-1995), and LOI values thereof were measured by using a JF-3 type oxygen index meter manufactured by Nanjing Jiangning Analyzer factory (the test standard was the national standard GB/T2406 of China) to obtain Table 1.
TABLE 1 product Property List
From the table 1, it can be seen that the flame retardant effect of the polyester PBT is obviously improved by adding the polyphosphonate flame retardant, and after the polyphosphonate flame retardant is added, the mechanical properties of the polyester PBT composite material are not changed greatly, even are slightly enhanced, because the main chain structure of the polyphosphonate flame retardant contains a plurality of benzene rings, the polyphosphonate flame retardant has good compatibility with the polyester PBT.
SEM spectrogram test analysis and comparison are carried out on the carbon layers after the sample strips of the comparative example 1 and the example 2 are combusted, and the result is shown in figure 3, and the fact that after the flame retardant is added, the surface of the halogen-free flame-retardant polyester composite material after the combustion presents a more compact carbon layer is found, and the carbon layer is beneficial to improving the flame-retardant effect of the halogen-free flame-retardant polyester composite material.
The above examples are merely preferred examples and are not intended to limit the embodiments of the present invention. In addition to the above embodiments, the present invention has other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (7)
1. The halogen-free flame-retardant polyester composite material is characterized by being prepared from the following raw material components in percentage by mass:
59-94.5% of polyester PBT;
5-40% of a polyphosphonate flame retardant;
0.5-1% of nucleating agent;
wherein the polyphosphonate flame retardant has the following structural formula:
and n in the structural formula is a positive integer of 21-50.
2. The halogen-free flame retardant polyester composite material as claimed in claim 1, wherein the halogen-free flame retardant polyester composite material has a tensile strength of 40 to 75MPa and a limiting oxygen index of 25 to 40%.
3. The halogen-free flame-retardant polyester composite material as claimed in claim 1 or 2, wherein the polyphosphonate flame retardant is prepared by one-step melt polycondensation of methyl diphenyl phosphate and bisphenol S.
4. The halogen-free flame-retardant polyester composite material as claimed in claim 3, wherein the molar ratio of the methyl diphenyl phosphate to the bisphenol S is (1-1.1): 1.
5. The preparation method of the halogen-free flame-retardant polyester composite material is characterized by comprising the following steps of:
1) uniformly mixing polyester PBT, polyphosphonate flame retardant and nucleating agent according to a formula to obtain a mixed base material;
2) putting the mixed base material obtained in the step 1) into a co-rotating double-screw extruder to be processed to obtain granules;
3) and (3) carrying out molding processing on the granules obtained in the step 2) by using an injection molding machine to obtain the flame-retardant material.
6. The preparation method of the halogen-free flame-retardant polyester composite material according to claim 5, wherein in the step 2), the processing temperature is 230-255 ℃, and the rotation speed is set to be 160-220 r/min.
7. The preparation method of the halogen-free flame-retardant polyester composite material according to claim 5, wherein in the step 3), the injection molding temperature is 235-260 ℃.
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|---|---|---|---|---|
| CN102174247A (en) * | 2011-03-02 | 2011-09-07 | 中国科学技术大学苏州研究院 | Halogen-free flame retardant glass fiber reinforced polyester composite and preparation method thereof |
| CN104861595A (en) * | 2015-06-08 | 2015-08-26 | 江苏理工学院 | Halogen-free flame retardant PBT material and preparation method thereof |
| CN105400179A (en) * | 2015-12-14 | 2016-03-16 | 中广核三角洲（苏州）高聚物有限公司 | Halogen-free flame-retardant high-temperature-resistant polyester elastomers and a preparation method therefor |
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- 2021-07-26 CN CN202110843746.9A patent/CN113502035A/en active Pending
Patent Citations (3)
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|---|---|---|---|---|
| CN102174247A (en) * | 2011-03-02 | 2011-09-07 | 中国科学技术大学苏州研究院 | Halogen-free flame retardant glass fiber reinforced polyester composite and preparation method thereof |
| CN104861595A (en) * | 2015-06-08 | 2015-08-26 | 江苏理工学院 | Halogen-free flame retardant PBT material and preparation method thereof |
| CN105400179A (en) * | 2015-12-14 | 2016-03-16 | 中广核三角洲（苏州）高聚物有限公司 | Halogen-free flame-retardant high-temperature-resistant polyester elastomers and a preparation method therefor |
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| Title |
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| 王小萌等: ""聚甲基膦酸酯的合成及应用研究进展"", 《绝缘材料》 * |
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Application publication date: 20211015 |