CN114561090B - Brominated flame-retardant reinforced polyethylene terephthalate composition easy to mold out and high in glowing filament performance, and preparation method and application thereof - Google Patents
Brominated flame-retardant reinforced polyethylene terephthalate composition easy to mold out and high in glowing filament performance, and preparation method and application thereof Download PDFInfo
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- 229920000139 polyethylene terephthalate Polymers 0.000 title claims abstract description 60
- 239000005020 polyethylene terephthalate Substances 0.000 title claims abstract description 60
- 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 class 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 43
- -1 polyethylene terephthalate Polymers 0.000 title claims abstract description 32
- 239000000203 mixture Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000003063 flame retardant Substances 0.000 claims abstract description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 238000002425 crystallisation Methods 0.000 claims abstract description 15
- 230000008025 crystallization Effects 0.000 claims abstract description 15
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 239000002667 nucleating agent Substances 0.000 claims abstract description 11
- 239000004209 oxidized polyethylene wax Substances 0.000 claims abstract description 11
- 235000013873 oxidized polyethylene wax Nutrition 0.000 claims abstract description 11
- 239000004698 Polyethylene Substances 0.000 claims abstract description 8
- 229920000573 polyethylene Polymers 0.000 claims abstract description 8
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 5
- 230000003078 antioxidant effect Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000012745 toughening agent Substances 0.000 claims description 4
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 239000011256 inorganic filler Substances 0.000 claims description 3
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- NSBGJRFJIJFMGW-UHFFFAOYSA-N trisodium;stiborate Chemical group [Na+].[Na+].[Na+].[O-][Sb]([O-])([O-])=O NSBGJRFJIJFMGW-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 230000000052 comparative effect Effects 0.000 description 17
- 238000012360 testing method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- BMENBXQCFCSBAQ-UHFFFAOYSA-N sodium;oxido(dioxo)-$l^{5}-stibane Chemical compound [Na+].[O-][Sb](=O)=O BMENBXQCFCSBAQ-UHFFFAOYSA-N 0.000 description 2
- 206010017472 Fumbling Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- CIWAOCMKRKRDME-UHFFFAOYSA-N tetrasodium dioxido-oxo-stibonatooxy-lambda5-stibane Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Sb]([O-])(=O)O[Sb]([O-])([O-])=O CIWAOCMKRKRDME-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- 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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
Abstract
The invention discloses a brominated flame-retardant reinforced polyethylene terephthalate (PET) composition with easy demolding and high glowing filament performance, and a preparation method and application thereof. The PET composition comprises the following components: 100 parts of PET resin, 25-35 parts of brominated flame retardant, 0.5-1.2 parts of flame retardant synergist, 5-10 parts of Melamine Cyanurate (MCA), 3-6 parts of composite master batch, 30-80 parts of glass fiber and 1-3 parts of oxidized polyethylene wax. The intrinsic viscosity of the PET resin is 0.52-0.85. The composite master batch takes polyethylene as a carrier, and comprises the components of a nucleating agent and a crystallization accelerator. The PET composition greatly improves the crystallization and demolding performance of PET materials, and has excellent glowing filament performance.
Description
Technical Field
The invention relates to the field of modification and molding processing of high molecular engineering plastics, in particular to a brominated flame-retardant reinforced polyethylene terephthalate composition with easy demolding and high glowing filament performance, and a preparation method and application thereof.
Background
Polyethylene terephthalate (PET) is widely used as engineering plastic with excellent electrical performance in electronic and electric products such as coil frameworks, motor shells, relay shells and the like. However, PET has the problems of poor crystallization performance, difficult demolding and the like, and limits the application in the field with higher molding requirements. Meanwhile, according to the IEC related standard, the product of household appliances with rated current above 0.2A, which is unattended, must have higher glow wire performance.
In the prior art, a PET composition comprising PET resin, glass fiber, brominated epoxy resin, sodium antimonate and MCA master batch is disclosed, but the glow wire GWIT can only reach 850 ℃/2.0mm at most, and the requirement on higher glow wire performance in the market cannot be met, so that the development of a PET composition with higher glow wire performance and easy demolding is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a brominated flame-retardant reinforced polyethylene terephthalate (PET) composition which is easy to demould and has high glowing filament performance, and a preparation method and application thereof.
The invention provides a brominated flame-retardant reinforced polyethylene terephthalate composition with easy demolding and high glowing filament performance, which comprises the following components:
the composite master batch is a composite master batch taking polyethylene as a carrier, and comprises a nucleating agent and a crystallization accelerator. The nucleating agent is sodium carboxylate, and the crystallization promoter is liquid pentaerythritol. The weight percentage of the polyethylene is 40-60%, the weight percentage of the nucleating agent is 5-10%, and the weight percentage of the accelerator is 35-55%. Polyethylene (PE) is used as a carrier and can play a certain role in toughening. The nucleating agent in the composite master batch can form more crystal nuclei more quickly in the cooling process of PET, and meanwhile, the crystallization accelerator can accelerate the movement of molecular chains and promote the growth of crystal grains, so that the purpose of promoting the rapid cooling crystallization of PET is achieved.
Further, the intrinsic viscosity of the PET resin is 0.52 to 0.85dL/g, preferably 0.58 to 0.8dL/g. The test standard for intrinsic viscosity is ASTM D4603-2003 (2011). When the intrinsic viscosity of the PET resin is higher than the above range, the fluidity is poor and the crystallization property is poor; below the above range, the resulting PET composition is insufficient in toughness and is liable to cause mold deposit.
Further, the brominated flame retardant is any one or more of brominated epoxy resin, brominated polystyrene and decabromodiphenyl ethane.
Further, the flame retardant synergist is sodium antimonate, preferably sodium metaantimonate.
Further, the oxidized polyethylene wax is a low density oxidized polyethylene wax. The molecular chain of the low-density polyethylene is more flexible, and the lubrication effect is better. And the melting point is about 100 ℃, which is favorable for reducing the cold crystallization of PET.
Further, the polyethylene terephthalate composition also comprises any one or more of a toughening agent, an inorganic filler, an antioxidant and a weather-proof agent. The toughening agent is a copolymer or a graft containing GMA groups, the inorganic filler is any one of mica powder, talcum powder, calcium carbonate and barium sulfate, the antioxidant is a hindered phenol antioxidant and a phosphate auxiliary antioxidant, and the weather-resistant agent is a hindered amine weather-resistant agent.
The invention also provides a preparation method of the polyethylene terephthalate composition, which comprises the following steps: weighing the raw materials according to parts by weight, mixing the raw materials in a high-speed mixer for 1-2 minutes to obtain a premix, and carrying out melt extrusion, cooling and granulation on the premix at 180-270 ℃ by a double-screw extruder to obtain the polyethylene terephthalate composition; the temperature of each screw barrel from the feed inlet to the machine head of the double-screw extruder is as follows: 180-210 ℃, 250-260 ℃, 250-270 ℃, 2200-240 ℃, 220-240 ℃, 230-250 ℃, the screw speed is 300-350 rpm, the feeding amount is 60-200 kg/h, and the vacuum degree is-0.1-0 MPa.
The invention also provides application of the polyethylene terephthalate composition in preparation of household appliances, electronic and electric components and office equipment.
In conclusion, compared with the prior art, the invention achieves the following technical effects:
according to the invention, by adding the composite master batch and oxidized polyethylene wax and fumbling the formulas in all aspects, the crystallization and demolding of the PET material are greatly improved, the material has excellent glowing filament performance, and the notch impact strength can reach 7.5KJ/M at the same time of reaching V-0 flame retardant grade 2 The maximum value of the glowing filament GWIT can reach 960 ℃/2.0mm.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution of the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
The key of the technical scheme is that the brominated flame-retardant reinforced PET product with good demoulding property and glowing filament performance is obtained by reasonably matching a brominated flame retardant, a flame-retardant synergist, MCA and composite master batch. The defect of low crystallization speed of the PET material can be improved by adding the composite master batch, and the demolding property of the material is greatly improved under the condition of being matched with a nucleating agent as a lubricant. By controlling the addition amounts of the flame retardant, the synergistic flame retardant and the MCA, the glowing filament performance of the material is greatly improved under the condition of meeting the flame retardant V-0.
Examples
The present invention will be further described with reference to the following specific examples, which are all preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following examples, and are not particularly limited to the types of raw materials of the components used in the following specific examples.
The raw materials in examples and comparative examples are all commercially available, and are specifically as follows:
PET resin #1: the intrinsic viscosity was 0.68dL/g, brand PET FG600, and was evaluated.
PET resin #2: the intrinsic viscosity is 0.8dL/g, the brand is PET BG80, and chemical fiber is detected.
PET resin #3: the intrinsic viscosity is 0.9dL/g, the trademark is EP901, and chemical fiber is identified.
PET resin #4: the intrinsic viscosity was 0.58dL/g, and the trade name was CR-7702, huarun chemical materials science and technology Co., ltd.
Brominated flame retardant: brominated flame retardants such as brominated epoxy resin, brominated polystyrene, decabromodiphenylethane are all possible, in this example brominated epoxy resin, trade name F-2100, israel icl is used.
Synergistic flame retardant #1: sodium metaantimonate, with the trademark SA-F, is produced.
Synergistic flame retardant #2: sodium pyroantimonate, new material of African Ante.
Melamine Cyanurate (MCA): the brand is MCA-A, sichuan fine chemical industry.
Glass fiber: alkali-free glass fiber with the trade name of ECS11-4.5-534A, china's megaphone.
The low density oxidized polyethylene wax is named PED-521, craien, germany.
High density oxidized polyethylene wax, brand 316A, kaiyin chemical industry.
Composite master batch: the weight percentage of polyethylene is 50%, the weight percentage of nucleating agent is 8%, the weight percentage of accelerator is 42%, and the brand CAM-6025 is like Xiaxin wood.
Toughening agent: the brand is PTW, a Dow elastomer.
Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art.
Weighing raw materials according to the formula dosage of specific examples 1-12 in Table 1 and comparative examples 1-10 in Table 2, respectively, mixing the raw materials in a high-speed mixer for 1-2 minutes to obtain a premix, and carrying out melt extrusion, cooling and granulation on the premix by a double-screw extruder at 180-270 ℃ to obtain the polyethylene terephthalate composition; the temperature of each screw barrel from the feed inlet to the machine head of the double-screw extruder is as follows: 180-210 ℃, 250-260 ℃, 250-270 ℃, 2200-240 ℃, 220-240 ℃, 230-250 ℃, the screw speed is 300-350 rpm, the feeding amount is 60-200 kg/h, and the vacuum degree is-0.1-0 MPa. The PET compositions prepared in examples 1 to 12 and comparative examples 1 to 10 were tested for mold release properties, flame retardant properties, glow wire properties and mechanical properties, respectively. The test results are shown in tables 3 and 4.
The performance testing method comprises the following steps:
(1) Mold release evaluation: the method of injection molding is evaluated, a set of relay housing mold with the wall thickness of 0.8mm is designed to be a mold with 32 products, the same injection molding process and cooling time are set, and the quality of the mold release is judged according to whether the products are stuck to the mold, cracked on top and the like during ejection. The product can be successfully propped against the mold for demolding, which means that the mold release is good, otherwise, the product is adhered to the mold, or the surface of the product is provided with a dent or rupture ejected by the ejector pin, which means that the mold release is poor;
(2) Flame retardancy: flame retardant rating of 0.8mm v-0 was tested according to UL 94 standard;
(3) Glow wire performance: the glow wire ignition temperature was tested and the template wall thickness was 1.5mm according to the IEC 60695-2-10-2013 standard;
(4) Notched impact strength: tested according to ISO 180-2010 standard.
Table 1 proportions of the components (parts by weight) of the examples
Table 2 comparative examples of the proportions (parts by weight) of the components
Table 3 results of performance testing of examples
Table 4 results of Performance test of comparative examples
Comparative example 1 is a single blank of composite master batch CAM-6025, comparative example 2 is a high level of composite master batch CAM-6025 component out of range, comparative example 3 is a low level of composite master batch CAM-6025 component out of range, comparative example 4 is a single blank of oxidized polyethylene wax, comparative example 5 is a single blank of MCA, comparative example 6 is a low level of MCA component out of range, comparative example 7 is a low level of brominated flame retardant component out of range, comparative example 8 is a high level of brominated flame retardant component out of range, comparative example 9 is a high level of flame retardant synergist component out of range, comparative example 10 is a single blank of glass fiber, and the control basis for the above comparative examples is example 4.
Based on the test data of the demolding performance, the flame retardant performance, the mechanical performance and the glowing filament performance in Table 3, the brominated flame retardant reinforced polyethylene terephthalate composition with easy demolding and high glowing filament performance prepared by the examples 1-12 has obvious advantages compared with the comparative examples, and can effectively meet the high standard requirements of customers and markets on the premise that the demolding performance, the notch impact strength and the flame retardant performance can meet the conditions, and the GWIT temperature can reach 960 ℃/2.0mm during glowing filament testing.
In conclusion, the inventionDiscloses a brominated flame-retardant reinforced polyethylene terephthalate (PET) composition with easy demolding and high glowing filament performance, and a preparation method and application thereof. The PET composition comprises the following components: 100 parts of PET resin, 25-35 parts of brominated flame retardant, 0.5-1.2 parts of flame retardant synergist, 5-10 parts of Melamine Cyanurate (MCA), 3-6 parts of composite master batch, 30-80 parts of glass fiber and 1-3 parts of oxidized polyethylene wax. The intrinsic viscosity of the PET resin is 0.52-0.85. The composite master batch takes polyethylene as a carrier, and comprises the components of a nucleating agent and a crystallization accelerator. The key of the technical scheme is that the brominated flame-retardant reinforced PET product with good demoulding property and glowing filament performance is obtained by reasonably matching a brominated flame retardant, a flame-retardant synergist, MCA and composite master batch. The defect of low crystallization speed of the PET material can be improved by adding the composite master batch, and the demolding property of the material is greatly improved under the condition of being matched with a nucleating agent as a lubricant. By controlling the addition amounts of the flame retardant, the synergistic flame retardant and the MCA, the glowing filament performance of the material is greatly improved under the condition of meeting the flame retardant V-0. The notch impact strength can reach 7.5KJ/M at the same time of reaching V-0 flame retardant grade 2 The maximum value of the glowing filament GWIT can reach 960 ℃/2.0mm, and can be widely applied to household appliances.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The brominated flame-retardant reinforced polyethylene terephthalate composition with easy demolding and high glowing filament performance is characterized by comprising the following components:
100 parts by weight of PET resin;
25-35 parts of brominated flame retardant;
0.5 to 1.2 parts by weight of flame retardant synergist;
5-10 parts by weight of melamine cyanurate;
3-6 parts of composite master batch;
30-80 parts by weight of glass fiber;
1-3 parts by weight of oxidized polyethylene wax;
the flame retardant synergist is sodium antimonate;
the composite master batch takes polyethylene as a carrier, and comprises a nucleating agent and a crystallization accelerator, wherein the nucleating agent is sodium carboxylate, and the crystallization accelerator is liquid pentaerythritol.
2. The polyethylene terephthalate composition according to claim 1, wherein the PET resin has an intrinsic viscosity of 0.52-0.85 dL/g.
3. The polyethylene terephthalate composition according to claim 2, wherein the PET resin has an intrinsic viscosity of 0.58-0.8dL/g.
4. The polyethylene terephthalate composition according to claim 1, wherein the brominated flame retardant is any one or more of brominated epoxy resin, brominated polystyrene, and decabromodiphenylethane.
5. The polyethylene terephthalate composition of claim 1 wherein the oxidized polyethylene wax is a low density oxidized polyethylene wax.
6. The polyethylene terephthalate composition of claim 1, further comprising any one or more of a toughening agent, an inorganic filler, an antioxidant, and a weathering agent.
7. The method for producing a polyethylene terephthalate composition according to any of claims 1-6, comprising the steps of:
weighing the raw materials according to parts by weight, mixing the raw materials in a high-speed mixer for 1-2 minutes to obtain a premix, and carrying out melt extrusion, cooling and granulation on the premix at 180-270 ℃ by a double-screw extruder to obtain the polyethylene terephthalate composition; the temperature of each screw barrel from the feed inlet to the machine head of the double-screw extruder is as follows: 180-210 ℃, 250-260 ℃, 250-270 ℃, 2200-240 ℃, 220-240 ℃, 230-250 ℃, the screw speed is 300-350 rpm, the feeding amount is 60-200 kg/h, and the vacuum degree is-0.1-0 MPa.
8. Use of the polyethylene terephthalate composition according to any of claims 1-6 in the preparation of household appliances, electronic and electrical components, office equipment.
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