CN112724619A - Flame-retardant reinforced PBT (polybutylene terephthalate) material with high GWIT (glow-wire ignition temperature) and preparation method thereof - Google Patents
Flame-retardant reinforced PBT (polybutylene terephthalate) material with high GWIT (glow-wire ignition temperature) and preparation method thereof Download PDFInfo
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- CN112724619A CN112724619A CN202011611511.9A CN202011611511A CN112724619A CN 112724619 A CN112724619 A CN 112724619A CN 202011611511 A CN202011611511 A CN 202011611511A CN 112724619 A CN112724619 A CN 112724619A
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- 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 76
- 239000003063 flame retardant Substances 0.000 title claims abstract description 63
- 239000000463 material Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims description 14
- 229920001707 polybutylene terephthalate Polymers 0.000 title description 60
- -1 polybutylene terephthalate Polymers 0.000 title description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 24
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 24
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000003365 glass fiber Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 239000000155 melt Substances 0.000 claims description 3
- 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 2
- DGZQEAKNZXNTNL-UHFFFAOYSA-N 1-bromo-4-butan-2-ylbenzene Chemical class CCC(C)C1=CC=C(Br)C=C1 DGZQEAKNZXNTNL-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 5
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 description 14
- 239000000835 fiber Substances 0.000 description 14
- 239000011521 glass Substances 0.000 description 14
- 229920002223 polystyrene Polymers 0.000 description 14
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- FYYHWMGAXLPEAU-OUBTZVSYSA-N magnesium-25 atom Chemical group [25Mg] FYYHWMGAXLPEAU-OUBTZVSYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
- C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/08—Copolymers of styrene
- C08J2425/12—Copolymers of styrene with unsaturated nitriles
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
-
- 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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- 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
- C08K3/2279—Oxides; Hydroxides of metals of antimony
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
Abstract
The invention discloses a high GWIT flame-retardant reinforced PBT material, which comprises the following raw materials: PBT resin, styrene-acrylonitrile copolymer, glass fiber, brominated flame retardant and auxiliary flame retardant. The magnesium hydroxide and the antimony trioxide are compounded to serve as auxiliary flame retardance, the ignition point of the material is delayed, and therefore the GWIT temperature is increased, and the composite material is very suitable for the fields of electronic components, electrical equipment, new energy automobiles and the like.
Description
Technical Field
The invention belongs to the technical field of modification of high polymer materials, and particularly relates to a high-GWIT flame-retardant reinforced PBT material and a preparation method thereof.
Background
Polybutylene terephthalate (PBT) is a common polymeric material, one of five major engineering plastics. The PBT material has the characteristics of fast crystallization, easy molding, chemical resistance and solvent resistance, and has very good electrical property, high insulativity, excellent arc resistance, but poor mechanical property and flame retardant property; after being reinforced by glass fiber, the PBT material has excellent rigidity and does not have obvious change in mechanical property under the condition of high humidity based on the characteristic of low hygroscopicity, so that the PBT material can replace a nylon material to be applied to the field of electronic and electric appliances. The flame-retardant modified PBT material has excellent flame retardant property, the glow wire index (GWFI) of the flame-retardant modified PBT material can reach 960 ℃, but the Glow Wire Ignition Temperature (GWIT) is lower than 800 ℃, and the flame-retardant modified PBT material has poor dimensional stability due to the characteristic of high crystallinity and is easy to warp after being reinforced by glass fibers, so that the application of the flame-retardant PBT material in some high-end fields and high-performance requirements is limited.
Therefore, the problem that the flame-retardant reinforced PBT material with high GWIT and low warpage can be provided is urgently needed to be solved by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a flame-retardant reinforced PBT material with high GWIT and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high GWIT flame-retardant reinforced PBT material comprises the following raw materials: PBT resin, styrene-acrylonitrile copolymer, glass fiber, brominated flame retardant and auxiliary flame retardant.
The invention improves the characteristic of easy deformation of PBT by introducing styrene-acrylonitrile copolymer (SAN), reduces the crystallinity of PBT, and plays a role in resisting warping; meanwhile, an auxiliary flame retardant is introduced, the GWIT index of the material is improved, and the technical problem in the prior art is solved.
Preferably, the feed comprises the following raw materials in parts by weight: 40-60 parts of PBT resin, 5-10 parts of styrene-acrylonitrile copolymer, 10-40 parts of glass fiber, 5-15 parts of brominated flame retardant and 5-15 parts of auxiliary flame retardant.
Preferably, the feed comprises the following raw materials in parts by weight: 45-55 parts of PBT resin, 6-9 parts of styrene-acrylonitrile copolymer, 15-35 parts of glass fiber, 7-13 parts of brominated flame retardant and 7-13 parts of auxiliary flame retardant.
Preferably, the PBT resin has an intrinsic viscosity of 0.6 to 1.3 dl/g.
Preferably, the PBT resin has an intrinsic viscosity of 0.9 to 1.2 dl/g.
Preferably, the styrene-acrylonitrile copolymer has a melt index of 1 to 30g/10 min.
Preferably, the styrene-acrylonitrile copolymer has a melt index of 2 to 10g/10 min.
Preferably, the glass fibers are coupling agent treated chopped glass fibers.
Preferably, the brominated flame retardant is any one of brominated polystyrene, brominated epoxy resin and decabromodiphenylethane.
Preferably, the auxiliary flame retardant is a compound of antimony trioxide and magnesium hydroxide, and the mass ratio of the antimony trioxide to the magnesium hydroxide is 1: 1-3.
The preparation method of the flame-retardant reinforced PBT material with high GWIT specifically comprises the following steps:
(1) weighing raw materials of PBT resin, styrene-acrylonitrile copolymer, glass fiber, brominated flame retardant and auxiliary flame retardant according to parts by weight;
(2) and uniformly mixing the PBT resin, the styrene-acrylonitrile copolymer, the brominated flame retardant and the auxiliary flame retardant, adding the mixture into a double-screw extruder through a main feeding material, adding the glass fiber into the double-screw extruder through a side feeding material, and then extruding and granulating the raw materials after the raw materials are melted and plasticized in the double-screw extruder to obtain the high-GWIT flame-retardant reinforced PBT material.
Preferably, the processing temperature of the twin-screw extruder is 220-260 ℃.
According to the technical scheme, compared with the prior art, the invention has the following beneficial effects: the invention provides a high GWIT flame-retardant reinforced PBT material and a preparation method thereof, on one hand, the invention improves the characteristic of easy deformation of PBT by introducing SAN, reduces the crystallinity of PBT, and plays a role in resisting warpage; on the other hand, magnesium hydroxide compounded with antimony trioxide is introduced as a second auxiliary flame retardant, magnesium hydroxide can be subjected to dehydration reaction when heated to 350 ℃, heat is absorbed, water molecules are released, and the water molecules can cover the surface of the material to reduce the surface temperature, so that the time for the material to reach an ignition point is prolonged to achieve the purpose of improving the GWIT index.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a high GWIT flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 60 parts of PBT resin, 5 parts of styrene-acrylonitrile copolymer, 15 parts of brominated polystyrene, 3 parts of antimony trioxide, 7 parts of magnesium hydroxide and 10 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through main feeding, adding glass chopped fiber into the double-screw extruder through side feeding, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the high-GWIT flame-retardant reinforced PBT material.
Example 2
A preparation method of a high GWIT flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 46 parts of PBT resin, 6 parts of styrene-acrylonitrile copolymer, 13 parts of brominated polystyrene, 5 parts of antimony trioxide, 10 parts of magnesium hydroxide and 20 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through main feeding, adding glass chopped fiber into the double-screw extruder through side feeding, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the high-GWIT flame-retardant reinforced PBT material.
Example 3
A preparation method of a high GWIT flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 50 parts of PBT resin, 7 parts of styrene-acrylonitrile copolymer, 10 parts of brominated polystyrene, 2 parts of antimony trioxide, 6 parts of magnesium hydroxide and 25 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through main feeding, adding glass chopped fiber into the double-screw extruder through side feeding, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the high-GWIT flame-retardant reinforced PBT material.
Example 4
A preparation method of a high GWIT flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 40 parts of PBT resin, 10 parts of styrene-acrylonitrile copolymer, 8 parts of brominated polystyrene, 3.5 parts of antimony trioxide, 8.5 parts of magnesium hydroxide and 30 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through main feeding, adding glass chopped fiber into the double-screw extruder through side feeding, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the high-GWIT flame-retardant reinforced PBT material.
Example 5
A preparation method of a high GWIT flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 42 parts of PBT resin, 8 parts of styrene-acrylonitrile copolymer, 25 parts of brominated polystyrene, 2.5 parts of antimony trioxide, 2.5 parts of magnesium hydroxide and 40 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene, antimony trioxide and magnesium hydroxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through main feeding, adding glass chopped fiber into the double-screw extruder through side feeding, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the high-GWIT flame-retardant reinforced PBT material.
Comparative example 1
A preparation method of a flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 67 parts of PBT resin, 5 parts of styrene-acrylonitrile copolymer, 15 parts of brominated polystyrene, 3 parts of antimony trioxide and 10 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene and antimony trioxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through a main feed, adding glass chopped fiber into the double-screw extruder through a side feed, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the flame-retardant reinforced PBT material.
Comparative example 2
A preparation method of a flame-retardant reinforced PBT material specifically comprises the following steps:
(1) weighing 56 parts of PBT resin, 7 parts of styrene-acrylonitrile copolymer, 10 parts of brominated polystyrene, 2 parts of antimony trioxide and 25 parts of glass chopped fiber;
(2) adding PBT resin, styrene-acrylonitrile copolymer, brominated polystyrene and antimony trioxide into a high-speed mixer, uniformly mixing, adding into a double-screw extruder through a main feed, adding glass chopped fiber into the double-screw extruder through a side feed, melting and plasticizing raw materials in the double-screw extruder at the temperature of 220 ℃ plus 260 ℃, and extruding and granulating to obtain the flame-retardant reinforced PBT material.
The PBT materials obtained in the examples 1-5 and the comparative examples 1-2 are subjected to a flame retardant test, a GWIT test and a notch impact strength test, wherein the flame retardant test is vertical flame retardant according to UL94, and the thickness of a sample strip is 2 mm; the GWIT test is carried out according to IEC 60695-2-13, and the thickness of a sample strip is 2 mm; notched impact strength according to ISO179 standard. The test results are shown in Table 1.
TABLE 1 test results of examples and comparative examples
According to the test results in table 1, it is found from comparative examples 1 to 2 and examples 1 to 5 that there is no significant change in impact strength after adding magnesium hydroxide, indicating that magnesium hydroxide has no significant influence on the physical properties of the material; the GWIT values of examples 1-5 are all above 800 ℃ and comparative examples 1-2 are all below 800 ℃; according to the data of the examples 4 and 5, the flame retardant performance of the composite material does not reach the V-0 grade, but the GWIT exceeds 800 ℃, which shows that the composite magnesium hydroxide can effectively improve the GWIT index of the material, but the flame retardant performance is slightly promoted by adding a small amount of the composite magnesium hydroxide, mainly because the magnesium hydroxide needs to be added in a large amount as a flame retardant, the flame retardant effect cannot be achieved by adding a small amount of the composite magnesium hydroxide, but the magnesium hydroxide generates dehydration reaction when being heated to 350 ℃, absorbs heat and releases water molecules, and the water molecules cover the surface of the material to reduce the surface temperature, so that the time for the material to reach the ignition point is prolonged, and the GWIT.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A flame-retardant reinforced PBT material with high GWIT is characterized by comprising the following raw materials: PBT resin, styrene-acrylonitrile copolymer, glass fiber, brominated flame retardant and auxiliary flame retardant.
2. The high GWIT flame retardant reinforced PBT material of claim 1, which is characterized by comprising the following raw materials in parts by weight: 40-60 parts of PBT resin, 5-10 parts of styrene-acrylonitrile copolymer, 10-40 parts of glass fiber, 5-15 parts of brominated flame retardant and 5-15 parts of auxiliary flame retardant.
3. The high GWIT flame retardant reinforced PBT material of claim 1, which is characterized by comprising the following raw materials in parts by weight: 45-55 parts of PBT resin, 6-9 parts of styrene-acrylonitrile copolymer, 15-35 parts of glass fiber, 7-13 parts of brominated flame retardant and 7-13 parts of auxiliary flame retardant.
4. A high GWIT flame retardant reinforced PBT material as claimed in any one of claims 1 to 3, wherein said PBT resin has an intrinsic viscosity of 0.6 to 1.3 dl/g.
5. A high GWIT flame retardant reinforced PBT material according to any of claims 1-3, wherein said styrene-acrylonitrile copolymer has a melt index of 1-30g/10 min.
6. A high GWIT flame retardant reinforced PBT material according to any one of claims 1 to 3, wherein said glass fibers are coupling agent treated chopped strand glass fibers.
7. A high GWIT flame retardant reinforced PBT material according to any one of claims 1-3, wherein said brominated flame retardant is any one of brominated polystyrene, brominated epoxy resin and decabromodiphenylethane.
8. A high GWIT flame retardant reinforced PBT material as claimed in any one of claims 1-3, wherein the auxiliary flame retardant is a compound of antimony trioxide and magnesium hydroxide, and the mass ratio of the antimony trioxide to the magnesium hydroxide is 1: 1-3.
9. A preparation method of a flame-retardant reinforced PBT material with high GWIT is characterized by comprising the following steps:
(1) weighing raw materials of PBT resin, styrene-acrylonitrile copolymer, glass fiber, brominated flame retardant and auxiliary flame retardant according to parts by weight;
(2) and uniformly mixing the PBT resin, the styrene-acrylonitrile copolymer, the brominated flame retardant and the auxiliary flame retardant, adding the mixture into a double-screw extruder through a main feeding material, adding the glass fiber into the double-screw extruder through a side feeding material, and then extruding and granulating the raw materials after the raw materials are melted and plasticized in the double-screw extruder to obtain the high-GWIT flame-retardant reinforced PBT material.
10. The method for preparing the high GWIT flame-retardant reinforced PBT material as recited in claim 9, wherein the processing temperature of the twin-screw extruder is 220-260 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011611511.9A CN112724619A (en) | 2020-12-30 | 2020-12-30 | Flame-retardant reinforced PBT (polybutylene terephthalate) material with high GWIT (glow-wire ignition temperature) and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011611511.9A CN112724619A (en) | 2020-12-30 | 2020-12-30 | Flame-retardant reinforced PBT (polybutylene terephthalate) material with high GWIT (glow-wire ignition temperature) and preparation method thereof |
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| CN112724619A true CN112724619A (en) | 2021-04-30 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131147A (en) * | 2013-03-29 | 2013-06-05 | 威海联桥新材料科技股份有限公司 | High heat wire inflaming retarding enhancement polybutylece terephthalate (PBT) material and manufacturing method thereof |
| CN105419252A (en) * | 2015-11-19 | 2016-03-23 | 东莞市众一新材料科技有限公司 | PBT composite with low warping and high surface glossiness and preparation method thereof |
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2020
- 2020-12-30 CN CN202011611511.9A patent/CN112724619A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131147A (en) * | 2013-03-29 | 2013-06-05 | 威海联桥新材料科技股份有限公司 | High heat wire inflaming retarding enhancement polybutylece terephthalate (PBT) material and manufacturing method thereof |
| CN105419252A (en) * | 2015-11-19 | 2016-03-23 | 东莞市众一新材料科技有限公司 | PBT composite with low warping and high surface glossiness and preparation method thereof |
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