CN102040810A - Polybutylece terephthalate (PBT) engineering plastics as well as preparation method and application thereof - Google Patents
Polybutylece terephthalate (PBT) engineering plastics as well as preparation method and application thereof Download PDFInfo
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- CN102040810A CN102040810A CN2010106123079A CN201010612307A CN102040810A CN 102040810 A CN102040810 A CN 102040810A CN 2010106123079 A CN2010106123079 A CN 2010106123079A CN 201010612307 A CN201010612307 A CN 201010612307A CN 102040810 A CN102040810 A CN 102040810A
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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
- 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
- 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
- B29C2948/92895—Barrel or housing
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Abstract
The invention is suitable for the technical field of high polymer materials and provides polybutylece terephthalate (PBT) engineering plastics as well as a preparation method and an application thereof. The PBT engineering plastics comprise the following components in parts by weight: 45-75 parts of PBT resins, 15-30 parts of fire retardants, 4-10 parts of flame retardant synergist, 0.8-1.2 parts of lubricating agents, 28-33 parts of glass fibers, 3-5 parts of flexibilizer, and 0.2-0.5 part of antioxidant, wherein the fire retardants are two or more of decabromdiphenylethane (DBDPE), brominated triazine, phosphorus-nitrogen based flame retardant and tetrabromobisphenol A; and the flame retardant synergist is antimonous oxide or sodium antimonite. The glowing filament test value, the proof tracking index (PTI) and the like of the PBT engineering plastics can be greatly improved by the modification effect of the flame retardants and the flame retardant synergist. In the preparation method of the PBT engineering plastics, sources of the raw materials are wide, the cost is low, the preparation process is simple, the production process is smooth and controllable, and the productivity effect is high; and the preparation method of the PBT engineering plastics is suitable for industrial production.
Description
Technical field
The invention belongs to technical field of polymer materials, relate in particular to a kind of PBT engineering plastics, its preparation method and application.
Background technology
Polybutylene terephthalate (PBT) is a kind of good thermoplastic engineering plastic, because of it has premium propertiess such as high thermotolerance, toughness, resistance to fatigue, weathering resistance, water-intake rate be low, at home and abroad is widely used in recent years.And through glass fibre or mineral-filled enhancing flame-retardant modified after, its physical strength is higher, molding shrinkage is greatly improved, and can replace some metals, thermosetting resin and other thermoplastics.
But up-to-date Australia standard has proposed 850 ℃ of nonflammable high requests of 30s of glowing filament test value (GWIT) especially to the electric equipment products that are applied in the extreme environment; The requirement of anti creepage trace index (CTI) 〉=300V that IEC tissue proposes, and along with the innovation of technology, the anti creepage trace exponential requires also to have brought up to 350V.The flame-retardant modified PBT material of enhancing that is widely used at present in the electric equipment products can only satisfy UL-941/16in V0, anti creepage trace index (CTI) 〉=300V and 750 ℃ of nonflammable requirements of 30s of glowing filament test value (GWIT) substantially, can not satisfy the high request in new Australia standard and the practical application simultaneously, have influence on the application of PBT engineering plastics greatly.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of PBT engineering plastics, solves PBT plastics glowing filament test performance in the prior art, technical problem that the anti creepage trace index is not high.
The present invention is achieved in that
A kind of PBT engineering plastics comprise the component of following parts by weight:
PBT resin 45-75
Fire retardant 15-30
Fire retarding synergist 4-10
Lubricant 0.8-1.2
Glass fibre 28-33
Toughner 3-5
Antioxidant 0.2-0.5
This fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol; This fire retarding synergist is antimonous oxide and/or sodium antimonate.
And,
A kind of PBT engineering plastics preparation method comprises the steps:
S01 mixes the component of following parts by weight stirring, mixes, and obtains PBT engineering plastics precursor;
S02 extrudes processing with this PBT engineering plastics precursor under 220-240 ℃ of condition, obtain the PBT engineering plastics, and in extruding treatment step, adding parts by weight is the glass fibre of 28-33,
PBT resin 45-75
Fire retardant 15-30
Fire retarding synergist 4-10
Lubricant 0.8-1.2
Toughner 3-5
Antioxidant 0.2-0.5
This fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol; This fire retarding synergist is antimonous oxide and/or sodium antimonate.
The embodiment of the invention further provides the application of above-mentioned PBT engineering plastics in electric equipment products, work box shell, electric wire.
Embodiment of the invention PBT engineering plastics by the modifying function of fire retardant and fire retarding synergist, are greatly improved the performance such as glowing filament test value, anti creepage trace index of PBT engineering plastics.Embodiment of the invention PBT engineering plastics preparation method, the starting material wide material sources of use, with low cost, make product have the great market competitiveness under the prerequisite of high-level requirement satisfying, preparation process is simple, production technique smoothness, controlled, the productivity effect height is very suitable for suitability for industrialized production.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The embodiment of the invention provides a kind of PBT engineering plastics, comprises the component of following parts by weight:
PBT resin 45-75
Fire retardant 15-30
Fire retarding synergist 4-10
Lubricant 0.8-1.2
Glass fibre 28-33
Toughner 3-5
Antioxidant 0.2-0.5
This fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol; This fire retarding synergist is antimonous oxide and/or sodium antimonate.
Embodiment of the invention PBT engineering plastics by the modifying function of fire retardant and fire retarding synergist, are greatly improved the performance such as glowing filament test value, anti creepage trace index of PBT engineering plastics.To the modifying function of PBT resin, make the mechanical property of PBT engineering plastics that remarkable lifting arranged by toughner and glass fibre.
Particularly, the unit of embodiment of the invention PBT engineering plastics weight part is gram, kilogram or ton.
Particularly, this PBT resin is meant polybutylene terephthalate, and the relative density of the PBT resin that the embodiment of the invention is used is 1.33-1.36, and fusing point is 222-227 ℃, and melt viscosity is 0.9-1.1dl/g.
Particularly, this fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol, the composition of component does not have the parts by weight restriction in this fire retardant, for example, this fire retardant is made up of TDE, brominated triazine and phosphor nitrogen combustion inhibitor, the ratio of the parts by weight of this TDE, brominated triazine, phosphor nitrogen combustion inhibitor can be 1: 1: 1, also can be 1: 2: 3 etc.
Particularly, this fire retarding synergist without limits, for example, antimonous oxide and/or sodium antimonate, the parts by weight of this sodium antimonate and antimonous oxide can be 1: 1 without limits, also can be 2: 1 or 3: 2 etc.
Decompose when this fire retardant is heated, produce non-flammable gas, the concentration of combustiblematerials being decomposed the inflammable gas that produces waters down below the burning lower limit.Also the oxygen concn in the combustion zone is diluted simultaneously, stop incendiary to be proceeded, reach fire-retardant effect; Collaborative this fire retardant of this fire retarding synergist plays fire retardation, promotes the flame retardant effect of this fire retardant.
Particularly, this lubricant is selected from one or more in OP wax, coupling agent, the white oil, by add lubricant in the PBT engineering plastics, this fire retardant and fire retarding synergist is fully disperseed in the PBT resin, promotes the homogeneity of PBT engineering plastics flame retardant effect.The parts by weight of this lubricant are 0.8-1.2.
Particularly, this oxidation inhibitor is selected from triglycol two-fine, four [methyl-β-(3 of 3-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propylene, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester, three (2, the 4-di-tert-butylphenol) one or more in the phosphorous acid ester (commercially available 1010,168,626 etc.), the parts by weight of this oxidation inhibitor are 0.2-0.5.By the oxidation inhibitor that mixes in the PBT resin, therefore oxidation stain when preventing to pass through the twin screw extruder processing among the preparation method can keep PBT resin color originally.
Particularly, this glass fibre can be various glass fibre without limits, for example long glass fibres, short glass fiber (long glass fibres and short glass fiber are usual term in this area), long glass fibres preferably, the diameter of this glass fibre is the 5-13 micron.The parts by weight of this glass fibre are 28-33.
Particularly, this toughner is selected from EPDM grafted maleic anhydride or acrylic ester grafted Ethylene Propylene Terpolymer elastomerics (commercially available PC-15), 1125AC etc., the parts by weight of toughner are 3-5, by this toughner that in the PBT resin, mixes, improve the interface binding power of PBT resin and fire retardant, fire retarding synergist, oxidation inhibitor and glass fibre, improve the toughness and the over-all properties of PBT engineering plastics.
The advantage of embodiment of the invention PBT engineering plastics is as follows:
1, use to use the fire retardant compound system, realized when envrionment temperature is not higher than 850 ℃, the nonflammable new standard of Australia GWIT850 ℃ 30s has been satisfied in the flames of anger in the modification polybutylene terephthalate engineering plastics 30s, nonflammable requirement;
2, realize anti creepage trace index CTI 〉=350V;
3, realize UL-94 standard 1/16in V0 rank;
The embodiment of the invention further provides a kind of PBT engineering plastics preparation method, comprises the steps:
S01 mixes the component of following parts by weight stirring, mixes, and obtains PBT engineering plastics precursor;
S02 extrudes processing with this PBT engineering plastics precursor under 220-240 ℃ of condition, obtain the PBT engineering plastics, and in extruding treatment step, adding parts by weight is the glass fibre of 28-33,
PBT resin 45-75
Fire retardant 15-30
Fire retarding synergist 4-10
Lubricant 0.8-1.2
Toughner 3-5
Antioxidant 0.2-0.5
This fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol; This fire retarding synergist is antimonous oxide and/or sodium antimonate.
Particularly, among the step S01, order according to PBT resin, toughner, lubricant, fire retardant, fire retarding synergist and oxidation inhibitor is mixed, the mixing equipment that uses in this step without limits, for example, agitation vat, high mixer etc., preferred agitation vat, in this step, mixing time is 5-10 minute, and the rotating speed of agitation vat is 500-1200 rev/min.
Particularly, toughner, lubricant, fire retardant, fire retarding synergist, oxidation inhibitor and glass fibre do not repeat to set forth at this with aforementioned identical in this step.
Further, before step S01, also comprise the PBT resin carried out the exsiccant step, drying means without limits, be 1-4 hour time of drying, preferred 2-3 hour; Drying temperature is 110-140 ℃, and dry back controlling moisture content is below 0.05%.
Among the step S02, the PBT engineering plastics precursor that obtains among the step S01 is extruded processing, in extruding processing, adding parts by weight is the glass fibre of 28-33, and glass fibre is mixed in extruding treatment step in the PBT engineering plastics simultaneously; The extrusion equipment that uses among this step S02 is preferably twin screw extruder without limits, makes this PBT engineering plastics precursor be in extruding pelletization under the molten state; This is extruded in the processing, adds glass fibre from the twin screw extruder stage casing, makes glass fibre and PBT precursor be in molten state, extruding pelletization more simultaneously.
Further, among the step S02, extrusion temperature is 220-240 ℃, be specially, one district 220-230 ℃, two district 220-230 ℃, three district 230-235 ℃, four district 230-240 ℃, five district 230-240 ℃, six district 220-235 ℃, seven district 220-240 ℃, extruding the treatment time is 1-5 minute, preferred 1-2 minute.
Further, behind the step S02,, making the batten test with in the PBT engineering plastics that obtain and the air dry oven under 110-140 ℃ of condition dry 1-3 hour.
Embodiment of the invention PBT engineering plastics preparation method, the various material sources that use are extensive, with low cost, make product have the great market competitiveness under the prerequisite of high-level requirement satisfying, preparation process is simple, production technique smoothness, controlled, the productivity effect height is very suitable for suitability for industrialized production.
The embodiment of the invention further provides the application of above-mentioned PBT engineering plastics in electric equipment products, work box shell, electric wire.For example, under high temperature, super-humid conditions to electrical property, the demanding timer of mechanical property, rly., switch etc.
Above-mentioned preparation method is described in detail below in conjunction with specific embodiment.
Embodiment one
Following umber is parts by weight:
75 parts of polybutylene terephthalates (PBT) were descended dry 2 hours at 120 ℃, and the control moisture content is 0.04%;
Place agitation vat to stir dried 75 parts of PBT resins, 15 parts of TDE, 15 parts of brominated triazines, 10 parts of antimonous oxides, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant then and obtained PBT engineering plastics precursor in 7 minutes;
With this PBT engineering plastics precursor through the twin screw extruder extruding pelletization, while is 30 glass fibre at twin screw extruder stage casing interpolation parts by weight, in the double-screw extruding pelletizing step, one district's temperature is that 220 ℃, two district's temperature are that 225 ℃, three district's temperature are that 230 ℃, four district's temperature are that 235 ℃, five district's temperature are that 230 ℃, six district's temperature are that 225 ℃, seven district's temperature are 230 ℃, extruding the treatment time is 2 minutes, obtains the PBT engineering plastics.
PBT engineering plastics 120 ℃ of dryings 3 hours in air dry oven are prepared into the standard testing batten through injection moulding machine then.
Embodiment two
Following umber is parts by weight:
60 parts polybutylene terephthalates (PBT) were descended dry 3 hours at 130 ℃, and the control moisture content is 0.04%;
Place agitation vat to stir dried 60 parts of PBT, 15 parts of brominated triazines, 10 parts of phosphor nitrogen combustion inhibitors, 2 parts of sodium antimonates, 6 parts of antimonous oxides, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant and obtained PBT engineering plastics precursor in 5 minutes;
With PBT engineering plastics precursor through the twin screw extruder extruding pelletization, while is 30 long glass fibres at twin screw extruder stage casing interpolation parts by weight, in the double-screw extruding pelletizing step, one district's temperature is that 225 ℃, two district's temperature are that 220 ℃, three district's temperature are that 232 ℃, four district's temperature are that 230 ℃, five district's temperature are that 235 ℃, six district's temperature are that 220 ℃, seven district's temperature are 225 ℃, the extruding pelletization time is 5 minutes, obtains the PBT engineering plastics.
With PBT engineering plastics 150 ℃ of dryings 1 hour in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
Embodiment three
Following umber is parts by weight:
55 parts of polybutylene terephthalates (PBT) were descended dry 4 hours at 150 ℃, and the control moisture content is 0.03%;
Place agitation vat to stir the back 55 parts of PBT resins of drying, 7 parts of phosphor nitrogen combustion inhibitors, 13 parts of tetrabromo-bisphenols, 6 parts of antimonous oxides, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant and obtained PBT engineering plastics precursor in 10 minutes;
This PBT engineering plastics precursor through the twin screw extruder extruding pelletization, is added 30 parts of long glass fibress simultaneously in the twin screw extruder stage casing.In the double-screw extruding pelletizing step, one district's temperature is that 230 ℃, two district's temperature are that 230 ℃, three district's temperature are that 235 ℃, four district's temperature are that 235 ℃, five district's temperature are that 240 ℃, six district's temperature are that 230 ℃, seven district's temperature are 230 ℃, extruding the treatment time is 4 minutes, obtains the PBT engineering plastics.
With these PBT engineering plastics 110 ℃ of dryings 3 hours in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
Embodiment four
Following umber is parts by weight
50 parts of polybutylene terephthalates were descended dry 4 hours at 110 ℃, and the control moisture content is 0.02%;
Place agitation vat to stir dried 50 parts of PBT, 4 parts of TDE, 11 parts of phosphor nitrogen combustion inhibitors, 4 parts of sodium antimonates, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant and obtained PBT engineering plastics precursor in 1 minute;
With this PBT engineering plastics precursor through the twin screw extruder extruding pelletization, add 30 parts of long glass fibress simultaneously in the twin screw extruder stage casing, in the double-screw extruding pelletizing step, one district's temperature is that 222 ℃, two district's temperature are that 223 ℃, three district's temperature are that 231 ℃, four district's temperature are that 240 ℃, five district's temperature are that 237 ℃, six district's temperature are that 235 ℃, seven district's temperature are 235 ℃, extruding the treatment time is 1 minute, obtains the PBT engineering plastics.With these PBT engineering plastics 140 ℃ of dryings 3 hours in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
Embodiment five
Following umber is parts by weight:
45 parts of polybutylene terephthalates were descended dry 3 hours at 125 ℃, and the control moisture content is 0.05%;
Place agitation vat to stir 2 minutes dried 45 parts of PBT, 8 parts of TDE, 12 parts of tetrabromo-bisphenols, 5 parts of antimonous oxides, 1 part of sodium antimonate, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant, obtain PBT engineering plastics precursor;
With this PBT engineering plastics precursor through the twin screw extruder extruding pelletization, add 30 parts of long glass fibress simultaneously in the twin screw extruder stage casing, in the double-screw extruding pelletizing step, one district's temperature is that 227 ℃, two district's temperature are that 228 ℃, three district's temperature are that 234 ℃, four district's temperature are that 238 ℃, five district's temperature are that 240 ℃, six district's temperature are that 235 ℃, seven district's temperature are 240 ℃, extruding the treatment time is 5 minutes, obtains the PBT engineering plastics.
With PBT engineering plastics 130 ℃ of dryings 2 hours in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
Embodiment six
Following umber is parts by weight:
45 parts of polybutylene terephthalates (PBT) were descended dry 3 hours at 120 ℃, and the control moisture content is 0.05%;
Place agitation vat to stir dried 45 parts of PBT, 16 parts of brominated triazines, 4 parts of tetrabromo-bisphenols, 4 parts of antimonous oxides, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant and obtained PBT engineering plastics precursor in 6 minutes;
Through the twin screw extruder extruding pelletization, add 30 parts of long glass fibress simultaneously in the twin screw extruder stage casing again.In the double-screw extruding pelletizing step, one district's temperature is that 223 ℃, two district's temperature are that 229 ℃, three district's temperature are that 235 ℃, four district's temperature are that 240 ℃, five district's temperature are that 240 ℃, six district's temperature are that 225 ℃, seven district's temperature are 235 ℃, extruding the treatment time is 1 minute, obtains the PBT engineering plastics.
With these PBT engineering plastics 120 ℃ of dryings 3 hours in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
Embodiment seven
Following umber is parts by weight:
45 parts of polybutylene terephthalates (PBT) were descended dry 1 hour at 125 ℃, and the control moisture content is 0.05%;
Place agitation vat to stir dried 45 parts of PBT, 10 parts of TDE, 5 parts of phosphor nitrogen combustion inhibitors, 6 parts of sodium antimonates, 4 parts of toughner, 1 part of lubricant, 0.3 part of antioxidant and obtained PBT engineering plastics precursor in 3 minutes;
With this PBT engineering plastics precursor through the twin screw extruder extruding pelletization, add 30 parts of long glass fibress simultaneously in the twin screw extruder stage casing, in the double-screw extruding pelletizing step, one district's temperature is that 230 ℃, two district's temperature are that 230 ℃, three district's temperature are that 235 ℃, four district's temperature are that 240 ℃, five district's temperature are that 240 ℃, six district's temperature are that 235 ℃, seven district's temperature are 240 ℃, extruding the treatment time is 1.5 minutes, obtains PBT engineering plastics precursor.
Embodiment eight
Following umber is parts by weight:
45 parts of polybutylene terephthalates (PBT) were descended dry 1 hour at 125 ℃, and the control moisture content is 0.05%;
Place agitation vat to stir dried 70 parts of PBT, 15 parts of TDE, 5 parts of phosphor nitrogen combustion inhibitors, 6 parts of sodium antimonates, 3 parts of toughner, 0.8 part of lubricant, 0.2 part of antioxidant and obtained PBT engineering plastics precursor in 3 minutes;
With this PBT engineering plastics precursor through the twin screw extruder extruding pelletization, add 28 parts of long glass fibress simultaneously in the twin screw extruder stage casing, in the double-screw extruding pelletizing step, one district's temperature is that 230 ℃, two district's temperature are that 230 ℃, three district's temperature are that 235 ℃, four district's temperature are that 240 ℃, five district's temperature are that 240 ℃, six district's temperature are that 235 ℃, seven district's temperature are 240 ℃, extruding the treatment time is 1.5 minutes, obtains PBT engineering plastics precursor.
Embodiment nine
Following umber is parts by weight:
65 parts of polybutylene terephthalates (PBT) were descended dry 3 hours at 120 ℃, and the control moisture content is 0.05%;
Place agitation vat to stir dried 45 parts of PBT, 16 parts of brominated triazines, 4 parts of tetrabromo-bisphenols, 4 parts of antimonous oxides, 5 parts of toughner, 1.2 parts of lubricants, 0.5 part of antioxidant and obtained PBT engineering plastics precursor in 6 minutes;
Through the twin screw extruder extruding pelletization, add 33 parts of long glass fibress simultaneously in the twin screw extruder stage casing again.In the double-screw extruding pelletizing step, one district's temperature is that 223 ℃, two district's temperature are that 229 ℃, three district's temperature are that 235 ℃, four district's temperature are that 240 ℃, five district's temperature are that 240 ℃, six district's temperature are that 225 ℃, seven district's temperature are 235 ℃, extruding the treatment time is 1 minute, obtains the PBT engineering plastics.
With these PBT engineering plastics 120 ℃ of dryings 3 hours in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
With this PBT engineering plastics precursor 120 ℃ of dryings 3 hours in air dry oven, be prepared into the standard testing batten through injection moulding machine then.
See also following table, show embodiment of the invention PBT engineering plastics The performance test results in the table:
The foregoing description uses the compound flame retardant system of different proportionings and fire retarding synergist to prepare 30% fiberglass reinforced fire retardant level PBT engineering plastic composite material.
As can be seen from the table, the PBT engineering plastics of the embodiment of the invention have excellent tensile strength, flexural strength, cantilever notched Izod impact strength and flame retardant properties, simultaneously:
Embodiment of the invention PBT engineering plastics use fire retardant commonly used to carry out composite, realized when envrionment temperature is not higher than 850 ℃, 850 ℃ of nonflammable new standards of 30s of Australia GWIT have been satisfied in the flames of anger in modification polybutylene terephthalate (PBT) the engineering plastics 30s, nonflammable requirement;
Embodiment of the invention PBT engineering plastics possess high anti creepage trace index CTI 〉=350V; Satisfy UL-94 standard 1/16in V0 rank.
The PBT engineering plastics of embodiment eight and embodiment nine, performance is similar with embodiment one to embodiment seven, does not repeat to set forth at this.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. PBT engineering plastics comprise the component of following parts by weight:
PBT resin 45-75
Fire retardant 15-30
Fire retarding synergist 4-10
Lubricant 0.8-1.2
Glass fibre 28-33
Toughner 3-5
Antioxidant 0.2-0.5
Described fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol; Described fire retarding synergist is antimonous oxide and/or sodium antimonate.
2. PBT engineering plastics as claimed in claim 1 is characterized in that: the parts by weight of described fire retardant are 10-20.
3. PBT engineering plastics as claimed in claim 1 is characterized in that: the melt viscosity of described PBT resin is 0.9-1.1dl/g.
4. PBT engineering plastics as claimed in claim 1 is characterized in that: described lubricant is selected from one or more in OP wax, coupling agent, the white oil.
5. PBT engineering plastics as claimed in claim 1, it is characterized in that: described oxidation inhibitor is selected from triglycol two-fine, four [methyl-β-(3 of 3-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propylene, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] in pentaerythritol ester, three (2, the 4-di-tert-butylphenol) phosphorous acid ester one or more.
6. PBT engineering plastics as claimed in claim 1 is characterized in that: described toughner is selected from EPDM grafted maleic anhydride or acrylic ester grafted Ethylene Propylene Terpolymer elastomerics.
7. PBT engineering plastics as claimed in claim 1 is characterized in that: described glass fibre is that diameter is the long glass fibres of 5-13 micron.
8. a PBT engineering plastics preparation method comprises the steps:
The component of following parts by weight is mixed stirring, mixed, obtain PBT engineering plastics precursor;
S02 extrudes processing with this PBT engineering plastics precursor under 220-240 ℃ of condition, obtain the PBT engineering plastics, and in extruding treatment step, adding parts by weight is the glass fibre of 28-33,
PBT resin 45-75
Fire retardant 15-30
Fire retarding synergist 4-10
Lubricant 0.8-1.2
Toughner 3-5
Antioxidant 0.2-0.5
Described fire retardant is selected from two or more in TDE, brominated triazine, phosphor nitrogen combustion inhibitor, the tetrabromo-bisphenol; Described fire retarding synergist is antimonous oxide and/or sodium antimonate.
9. preparation method as claimed in claim 8 is characterized in that, the described treatment temp of extruding is specially:
One district 220-230 ℃, two district 220-230 ℃, three district 230-235 ℃, four district 230-240 ℃, five district 230-240 ℃, six district 220-235 ℃, seven district 220-240 ℃; The described time of extruding processing is 1-5 minute.
10. as each described PBT engineering plastics application in electric equipment products, work box shell, electric wire of claim 1-7.
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| CN102391623A (en) * | 2011-09-30 | 2012-03-28 | 中山市纳普工程塑料有限公司 | Ultrahigh-glowing filament temperature and flame-retardant reinforced PBT (polybutylece terephthalate) composite material and preparation method thereof |
| CN102775744A (en) * | 2012-07-05 | 2012-11-14 | 佛山市顺德区顺炎塑料有限公司 | Environment-friendly polybutylece terephthalate (PBT) engineering plastic and preparation method thereof |
| CN103740067A (en) * | 2013-12-31 | 2014-04-23 | 宁波小康塑料有限公司 | Plybutylene terephthalate compound |
| CN105400156A (en) * | 2015-12-09 | 2016-03-16 | 昆山力兆塑胶有限公司 | High glow wire high CTI flame retardant reinforced PBT composite material |
| CN106084686A (en) * | 2016-08-25 | 2016-11-09 | 深圳市高科塑化有限公司 | Charging pile CTI high glow-wire PBT composite and preparation method thereof |
| CN110885538A (en) * | 2019-12-08 | 2020-03-17 | 周佩珍 | Flame-retardant high-temperature-resistant electric wire and manufacturing method thereof |
| CN112280254A (en) * | 2020-07-27 | 2021-01-29 | 苏州市新广益电子有限公司 | Environment-friendly PBT home decoration film and adhesive tape produced by applying same |
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| CN102391623A (en) * | 2011-09-30 | 2012-03-28 | 中山市纳普工程塑料有限公司 | Ultrahigh-glowing filament temperature and flame-retardant reinforced PBT (polybutylece terephthalate) composite material and preparation method thereof |
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| CN103740067A (en) * | 2013-12-31 | 2014-04-23 | 宁波小康塑料有限公司 | Plybutylene terephthalate compound |
| CN105400156A (en) * | 2015-12-09 | 2016-03-16 | 昆山力兆塑胶有限公司 | High glow wire high CTI flame retardant reinforced PBT composite material |
| CN106084686A (en) * | 2016-08-25 | 2016-11-09 | 深圳市高科塑化有限公司 | Charging pile CTI high glow-wire PBT composite and preparation method thereof |
| CN110885538A (en) * | 2019-12-08 | 2020-03-17 | 周佩珍 | Flame-retardant high-temperature-resistant electric wire and manufacturing method thereof |
| CN112280254A (en) * | 2020-07-27 | 2021-01-29 | 苏州市新广益电子有限公司 | Environment-friendly PBT home decoration film and adhesive tape produced by applying same |
| CN112280254B (en) * | 2020-07-27 | 2023-06-02 | 苏州市新广益电子股份有限公司 | Environment-friendly PBT home decoration film and adhesive tape produced by using same |
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