CN102532826A - Low-cost flame-retardant fiberglass-reinforced PBT (Polybutylene Terephthalate) engineering plastic and preparation method thereof - Google Patents
Low-cost flame-retardant fiberglass-reinforced PBT (Polybutylene Terephthalate) engineering plastic and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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Abstract
The invention discloses a low-cost flame-retardant fiberglass-reinforced PBT (Polybutylene Terephthalate) engineering plastic, which is composed of the following components in percentage by mass: 40-65% of PBT, 5-15% of PET (Polyethylene Terephthalate), 9-17% of bromine-series flame retardant, 1-5% of antimony-containing flame retardant synergist, 1-5% of silicate, 3-8% of toughening agent, 0.2-0.6% of antioxidant, 1-2% of nucleating agent, 10-40% of fiberglass, and 0.3-1% of processing aid, wherein the flame retardant system is composed of the environmentally-friendly bromine-series flame retardant, the flame retardant synergist and the silicate, the silicate can replace part of the antimony-containing flame retardant synergist, a mixed synergist is composed of the silicate and the antimony-containing synergist, and the silicate has lower cost and has the action of inhibiting smoke. The preparation method of the low-cost flame-retardant fiberglass-reinforced PBT engineering plastic provided by the invention is simple in process, low in cost and high in efficiency.
Description
Technical field
The present invention relates to engineering plastic modification technical field in the macromolecular material, relate in particular to a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics and preparation method thereof.
Background technology
Polybutylene terephthalate (PBT) is a kind of engineering plastics of high comprehensive performance, has advantages such as physical strength, wear resistance, self lubricity, fluidity of molten, weather resisteant preferably.In order to satisfy the requirement of PBT material HS, high heat resistance, high rigidity, high flame retardant; People have carried out fire-retardant enhancing modified to the PBT material; Flame-retardant reinforced PBT engineering plastic is widely used in many fields; As aspect electric, as connector, switch, rly., electricity-saving lamp lamp socket, coil rack, motor housing etc.; Aspect automotive industry, as switchboard, bobbin frame, gear, pump case etc.But, when improving the PBT Flame Retardancy, also improved the cost of PBT material itself.Along with the development of world economy, human environmental consciousness progressively improves, and under prerequisite cheaply, the environmental protection friendly of automobile, electronics, electrical equipment material is required also increasingly stringent.
At present, bromine both domestic and external is that flame-proof glass fibre strengthens the PBT engineering plastics, and the flame-retardant system that uses mostly is bromated fire retardant and stibiated fire retarding synergist.Stibiated synergist mainly contains Antimony Trioxide: 99.5Min (Sb203) or sodium antimonate.But, be the flame-retardant system of synergist with Sb203 or sodium antimonate, on the one hand, the cost of fire retardant material is higher; On the other hand, the amount of being fuming of fire retardant material is bigger, existent environment of people has been caused extremely seriously influence.
In view of this, provide low-cost flame-retardant fiber glass reinforced PBT engineering plastics and preparation method thereof to necessitate.
Summary of the invention
Goal of the invention of the present invention provides a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics and preparation method thereof.
To achieve these goals, a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics provided by the invention, it is composed of the following components by the quality percentage composition: PBT:40～65%; PET:5～15%; Bromide fire retardant: 9～17%; Contain the antimony fire retarding synergist: 1～5%; Silicate: 1～5%; Toughner: 3～8%; Oxidation inhibitor: 0.2～0.6%; Nucleator: 1～2%; Spun glass: 10～40%; Processing aid: 0.3～1%.
Further, said PBT is the isoviscous resin of middle height; Said PET is the isoviscous resin of middle height.
Further, said bromide fire retardant is TDE or brominated epoxy resin.
Further, the said antimony fire retarding synergist that contains is in Antimony Trioxide: 99.5Min or the sodium antimonate or composite together Antimony Trioxide: 99.5Min and sodium antimonate; Said silicate can be pure aluminium silicate or Magnesium Silicate q-agent or composite together pure aluminium silicate and Magnesium Silicate q-agent.
Further, said toughner is ethylene-methyl methacrylate methyl terpolymer (EMA) or ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA) or composite together ethylene-methyl methacrylate methyl terpolymer (EMA) and ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA).
Further, said oxidation inhibitor is mixed by primary antioxidant four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and auxiliary antioxidant tricresyl phosphite (24-di-tert-butyl-phenyl) ester.
Further, said nucleator is the inorganic nano talcum powder.
Further, said spun glass is that alkali-free is long fine, and its diameter is: 9～14 μ m.
Further, said processing aid is silicone powder or pentaerythritol tetrastearate (PETS) or composite together silicone powder and pentaerythritol tetrastearate (PETS).
The present invention also provides a kind of preparation method of low-cost flame-retardant fiber glass reinforced PBT engineering plastics, and it comprises the steps:
A, take by weighing each component by the described quality percentage composition of claim 1, and with the PBT that takes by weighing, PET in 100～120 ℃ of temperature following time of drying more than 6 hours, other component is dry more than 2 hours under 60～80 ℃ of temperature;
B, with dried PBT, PET, bromide fire retardant, contain antimony fire retarding synergist, silicate, nucleator, toughner, oxidation inhibitor and processing aid and in high-speed mixer, mix, stirring is 10～15 minutes;
C, the material behind the step b mixing is joined in the hopper of twin screw extruder, the side spout of spun glass from twin screw extruder is added, through high temperature forcing machine melt blending extrude, cooling, air-dry, granulation;
Wherein, each heating region temperature of this twin screw extruder is set to respectively: district's temperature: 200～220 ℃; Two district's temperature: 210～230 ℃; Three district's temperature: 220～240 ℃; Four district's temperature: 230～250 ℃; Five district's temperature: 240～260 ℃; Six district's temperature: 240～255 ℃; Seven district's temperature: 230～245 ℃; Eight district's temperature: 220～240 ℃; Head temperature: 210～230 ℃; Screw speed is 200～400 rev/mins.
A kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics provided by the invention; Its flame-retardant system is made up of environmental protection bromide fire retardant, fire retarding synergist and silicate; Wherein silicate can substitute partly and contain the antimony fire retarding synergist, and it forms the mixing synergist with containing the antimony fire retarding synergist.The cost of silicate is lower, also has the effect that presses down cigarette simultaneously, can substitute 30%～50% antimony containing compounds as fire retarding synergist.A kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics that this invention provides can substitute whole antimony containing compounds synergistic flame-retardant enhanced PBT materials fully, have advantages such as low cost, high-performance, highly effective flame-retardant property.The preparation method of a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics provided by the invention, technology is simple, cost is low, efficient is high.
Embodiment
A kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics provided by the invention, it is composed of the following components by the quality percentage composition: PBT:40～65%; PET:5～15%; Bromide fire retardant: 9～17%; Contain the antimony fire retarding synergist: 1～5%; Silicate: 1～5%; Toughner: 3～8%; Oxidation inhibitor: 0.2～0.6%; Nucleator: 1～2%; Spun glass: 10～40%; Processing aid: 0.3～1%.
The present invention adopts silicate partly to substitute antimony containing compounds synergistic flame-proof glass fibre enhancing PBT, reduces the consumption that contains the antimony synergist on the one hand, reduces cost.The adding of silicate also has the cigarette effect of pressing down on the other hand, and the performance impact to material is very little simultaneously.Thereby make PBT material of the present invention that preferable performance and flame-retardant smoke inhibition effect arranged.
Wherein, high isoviscous resin during PBT (polybutylene terephthalate) and PET (polyethyleneterephthalate) are.
Bromide fire retardant is TDE or brominated epoxy resin.That is, bromide fire retardant is a kind of in TDE or the brominated Polystyrene.
Contain the antimony fire retarding synergist and be in Antimony Trioxide: 99.5Min or the sodium antimonate or composite together Antimony Trioxide: 99.5Min and sodium antimonate; Said silicate can be pure aluminium silicate or Magnesium Silicate q-agent or composite together pure aluminium silicate and Magnesium Silicate q-agent.That is, contain the antimony fire retarding synergist and can be in Antimony Trioxide: 99.5Min, the sodium antimonate one or both.Silicate can be pure aluminium silicate or Magnesium Silicate q-agent or composite together pure aluminium silicate and Magnesium Silicate q-agent, that is, part substitutes the silicate that contains the antimony synergist can be pure aluminium silicate, one or both in the Magnesium Silicate q-agent.
Flame-retardant system in a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics provided by the invention is made up of environmental protection bromide fire retardant, the synergist that contains antimony and silicate.The cost of silicate is lower, also has the effect that presses down cigarette simultaneously, can substitute 30%～60% antimony containing compounds as fire retarding synergist.These low-cost flame-retardant fiber glass reinforced PBT engineering plastics can substitute whole antimony containing compounds synergistic flame-retardant enhanced PBT materials fully, have advantages such as low cost, high-performance, highly effective flame-retardant property.
Toughner is ethylene-methyl methacrylate methyl terpolymer (EMA) or ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA) or composite together ethylene-methyl methacrylate methyl terpolymer (EMA) and ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA).That is, toughner can be for being in ethylene-methyl methacrylate methyl terpolymer (EMA) or the ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA) one or both.
Oxidation inhibitor is mixed by primary antioxidant four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and auxiliary antioxidant tricresyl phosphite (24-di-tert-butyl-phenyl) ester.
Nucleator is the inorganic nano talcum powder.
Spun glass is that alkali-free is long fine, and its diameter is: 9～14 μ m.
Processing aid is silicone powder or pentaerythritol tetrastearate (PETS) or composite together silicone powder and pentaerythritol tetrastearate (PETS).That is, processing aid can be in silicone powder and the pentaerythritol tetrastearate (PETS) one or both, can increase substantially flowability, processibility, the surface gloss of product.
The present invention adopts part silicate to substitute the flame-proof glass fibre enhancing PBT material that antimony containing compounds fire retarding synergist and PBT and other auxiliary agent melt blending make; When keeping the PBT material property, can reduce the cost of PBT material effectively, and material contains the environmental protection bromide fire retardant again, contains antimony and silicate fire retarding synergist; In the combustion processes of material; Silicate forms a kind of carbonized silicate structure on the surface of material, cover combustible material not above, make the inflammable gas of decomposes be difficult to overflow; Play a part heat insulation, separate, press down cigarette, the amount of being fuming in the time of can reducing the PBT material combustion.Therefore, low-cost flame-retardant fiber glass reinforced PBT engineering plastics of the present invention are a kind of low costs, low-smoke, high performance material.Can be widely used in fields such as electronics, electrical equipment, automotive material.
The present invention also provides a kind of preparation method of low-cost flame-retardant fiber glass reinforced PBT engineering plastics, and it comprises the steps:
A, take by weighing each component by the described quality percentage composition of claim 1, and with the PBT that takes by weighing, PET in 100～120 ℃ of temperature following time of drying more than 6 hours, other component is dry more than 2 hours under 60～80 ℃ of temperature;
B, with dried PBT, PET, bromide fire retardant, contain antimony fire retarding synergist, silicate, nucleator, toughner, oxidation inhibitor and processing aid and in high-speed mixer, mix, stirring is 10～15 minutes;
C, the material behind the step b mixing is joined in the hopper of twin screw extruder, the side spout of spun glass from twin screw extruder is added, through high temperature forcing machine melt blending extrude, cooling, air-dry, granulation;
Wherein, each heating region temperature of this twin screw extruder is set to respectively: district's temperature: 200～220 ℃; Two district's temperature: 210～230 ℃; Three district's temperature: 220～240 ℃; Four district's temperature: 230～250 ℃; Five district's temperature: 240～260 ℃; Six district's temperature: 240～255 ℃; Seven district's temperature: 230～245 ℃; Eight district's temperature: 220～240 ℃; Head temperature: 210～230 ℃; Screw speed is 200～400 rev/mins.
Below in conjunction with embodiment the present invention is done a detailed elaboration.Wherein in following each embodiment, main anti-oxidant and auxiliary antioxidant are respectively the Irganox 1010 and 168 that Switzerland's vapour crust produces; Nucleator is the talcum powder of high order number; Processing aid is silicone powder and PETS mixture; Fire retardant is a brominated epoxy resin; Containing the antimony fire retarding synergist is sodium antimonate, and the silicate synergist that part substitutes sodium antimonate is a pure aluminium silicate; Toughner is ethylene-methacrylic acid copolymer (EMA).
Embodiment 1
With PBT, PET 120 ℃ dry 6 hours down, remaining auxiliary agent 70 ℃ dry 3 hours down.Take by weighing PBT 53.9kg, PET 8kg, brominated epoxy resin 11kg, sodium antimonate 1.5kg; Pure aluminium silicate 4.0kg, toughner 5kg, nucleator 0.5kg; Oxidation inhibitor 0.5kg (wherein primary antioxidant 10100.2kg, auxiliary antioxidant 1680.3kg), lubricant 0.6kg (wherein the silicone powder 0.4, and PETS 0.2); In high-speed mixer, stir 10min then.Again the material behind the mixing is joined in the hopper of twin screw extruder, control each section temperature and exist: a district: 220 ℃; Two districts: 225 ℃; Three districts: 230 ℃; Four districts: 240 ℃; Five districts: 250 ℃; Six districts: 245 ℃; Seven districts: 240 ℃; Eight districts: 235 ℃; Head temperature: 230 ℃, screw speed 350r/min adds the 15kg spun glass from the spout in twin screw stage casing, through melt blending extrude, water-cooled, air-dry, pelletizing, oven dry, being packaged into bag at last is low-cost flame-retardant fiber glass reinforced PBT engineering plastics.
Embodiment 2
With PBT, PET 120 ℃ dry 6 hours down, remaining auxiliary agent 70 ℃ dry 3 hours down.Take by weighing PBT 49.4kg, PET 8kg, brominated epoxy resin 11kg, sodium antimonate 1kg; Pure aluminium silicate 4kg, toughner 5kg, nucleator 0.5kg; Oxidation inhibitor 0.5kg (wherein primary antioxidant 10100.2kg, auxiliary anti-oxidant 1680.3kg), lubricant 0.6kg (wherein the silicone powder 0.4, and PETS 0.2); In high-speed mixer, stir 10min then.Again the material behind the mixing is joined in the hopper of twin screw extruder, control each section temperature and exist: a district: 220 ℃; Two districts: 225 ℃; Three districts: 230 ℃; Four districts: 240 ℃; Five districts: 250 ℃; Six districts: 245 ℃; Seven districts: 240 ℃; Eight districts: 235 ℃; Head temperature: 230 ℃, screw speed 350r/min adds the 20kg spun glass from the spout in twin screw stage casing, through melt blending extrude, water-cooled, air-dry, pelletizing, oven dry, being packaged into bag at last is low-cost flame-retardant fiber glass reinforced PBT engineering plastics.
Embodiment 3
With PBT, PET 120 ℃ dry 6 hours down, remaining auxiliary agent 70 ℃ dry 3 hours down.Take by weighing PBT 41.9kg, PET 8kg, brominated epoxy resin 10kg; Sodium antimonate 1.5kg, pure aluminium silicate 3kg toughner 4kg, nucleator 0.5kg; Oxidation inhibitor 0.5kg (wherein primary antioxidant 10100.2kg, auxiliary anti-oxidant 1680.3kg), lubricant 0.6kg (wherein the silicone powder 0.4, and PETS 0.2); In high-speed mixer, stir 10min then.Again the material behind the mixing is joined in the hopper of twin screw extruder, control each section temperature and exist: a district: 220 ℃; Two districts: 225 ℃; Three districts: 230 ℃; Four districts: 240 ℃; Five districts: 250 ℃; Six districts: 245 ℃; Seven districts: 240 ℃; Eight districts: 235 ℃; Head temperature: 230 ℃, screw speed 350r/min adds the 30kg spun glass from the spout in twin screw stage casing, through melt blending extrude, water-cooled, air-dry, pelletizing, oven dry, being packaged into bag at last is low-cost flame-retardant fiber glass reinforced PBT engineering plastics.
Embodiment 4
With PBT, PET 120 ℃ dry 6 hours down, remaining auxiliary agent 70 ℃ dry 3 hours down.Take by weighing PBT 33.4kg, PET 8kg, brominated epoxy resin 9kg, sodium antimonate 1kg; Pure aluminium silicate 3.0kg, compatilizer 4kg, nucleator 0.5kg; Oxidation inhibitor 0.5kg (wherein primary antioxidant 10100.2kg, auxiliary anti-oxidant 1680.3kg), lubricant 0.6kg (wherein the silicone powder 0.4, and PETS 0.2); In high-speed mixer, stir 10min then.Again the material behind the mixing is joined in the hopper of twin screw extruder, control each section temperature and exist: a district: 220 ℃; Two districts: 225 ℃; Three districts: 230 ℃; Four districts: 240 ℃; Five districts: 250 ℃; Six districts: 245 ℃; Seven districts: 240 ℃; Eight districts: 235 ℃; Head temperature: 230 ℃, screw speed 350r/min adds the 40kg spun glass from the spout in twin screw stage casing, through melt blending extrude, water-cooled, air-dry, pelletizing, oven dry, being packaged into bag at last is low-cost flame-retardant fiber glass reinforced PBT engineering plastics.
The flame-retardant reinforced PBT engineering plastic of embodiment 1 to 4 is injection molded into standard test specimen, and test performance is as shown in the table:
Can know by last table, form with pure aluminium silicate and sodium antimonate and mix the flame-proof glass fibre enhancing PBT material that fire retarding synergist and PBT and other auxiliary agent melt blending make, can keep the PBT material property, and its flame retardant properties reach V
0, it satisfies the environmental requirement in fields such as electronics, electrical equipment, automotive material, can be widely used in fields such as electronics, electrical equipment, automotive material.
Above disclose be merely preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, the equivalent variations of therefore doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (10)
1. low-cost flame-retardant fiber glass reinforced PBT engineering plastics is characterized in that: it is composed of the following components by the quality percentage composition:
PBT 40～65％；
PET 5～15％；
Bromide fire retardant 9～17%;
Contain antimony fire retarding synergist 1～5%;
Silicate 1～5%;
Toughner 3～8%;
Oxidation inhibitor 0.2～0.6%;
Nucleator 1～2%;
Spun glass 10～40%;
Processing aid 0.3～1%.
2. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1 is characterized in that: said PBT is the isoviscous resin of middle height; Said PET is the isoviscous resin of middle height.
3. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1, it is characterized in that: said bromide fire retardant is TDE or brominated epoxy resin.
4. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1 is characterized in that: the said antimony fire retarding synergist that contains is in Antimony Trioxide: 99.5Min or the sodium antimonate or composite together Antimony Trioxide: 99.5Min and sodium antimonate;
Said silicate can be pure aluminium silicate or Magnesium Silicate q-agent or composite together pure aluminium silicate and Magnesium Silicate q-agent.
5. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1 is characterized in that: said toughner is ethylene-methyl methacrylate methyl terpolymer (EMA) or ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA) or composite together ethylene-methyl methacrylate methyl terpolymer (EMA) and ethylene-methyl acrylate-glycidyl methacrylate copolymer (E-MA-GMA).
6. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1; It is characterized in that: said oxidation inhibitor is mixed by primary antioxidant four [β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and auxiliary antioxidant tricresyl phosphite (24-di-tert-butyl-phenyl) ester.
7. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1, it is characterized in that: said nucleator is the inorganic nano talcum powder.
8. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1 is characterized in that: said spun glass is that alkali-free is long fine, and its diameter is: 9～14 μ m.
9. a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics according to claim 1 is characterized in that: said processing aid is silicone powder or pentaerythritol tetrastearate (PETS) or composite together silicone powder and pentaerythritol tetrastearate (PETS).
10. the preparation method of a kind of low-cost flame-retardant fiber glass reinforced PBT engineering plastics as claimed in claim 1, it comprises the steps:
A, take by weighing each component by the described quality percentage composition of claim 1, and with the PBT that takes by weighing, PET in 100～120 ℃ of temperature following time of drying more than 6 hours, other component is dry more than 2 hours under 60～80 ℃ of temperature;
B, with dried PBT, PET, bromide fire retardant, contain antimony fire retarding synergist, silicate, nucleator, toughner, oxidation inhibitor and processing aid and in high-speed mixer, mix, stirring is 10～15 minutes;
C, the material behind the step b mixing is joined in the hopper of twin screw extruder, the side spout of spun glass from twin screw extruder is added, through high temperature forcing machine melt blending extrude, cooling, air-dry, granulation;
Wherein, each heating region temperature of this twin screw extruder is set to respectively: district's temperature: 200～220 ℃; Two district's temperature: 210～230 ℃; Three district's temperature: 220～240 ℃; Four district's temperature: 230～250 ℃; Five district's temperature: 240～260 ℃; Six district's temperature: 240～255 ℃; Seven district's temperature: 230～245 ℃; Eight district's temperature: 220～240 ℃; Head temperature: 210～230 ℃; Screw speed is 200～400 rev/mins.
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| CN2011104241126A CN102532826A (en) | 2011-12-16 | 2011-12-16 | Low-cost flame-retardant fiberglass-reinforced PBT (Polybutylene Terephthalate) engineering plastic and preparation method thereof |
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| CN2011104241126A CN102532826A (en) | 2011-12-16 | 2011-12-16 | Low-cost flame-retardant fiberglass-reinforced PBT (Polybutylene Terephthalate) engineering plastic and preparation method thereof |
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