CN102775745A - Flame-retardant glass fiber enhanced PBT (polybutylece terephthalate) composition with high CTI (comparative tracking index) and low precipitating property and preparation thereof - Google Patents

Flame-retardant glass fiber enhanced PBT (polybutylece terephthalate) composition with high CTI (comparative tracking index) and low precipitating property and preparation thereof Download PDF

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Publication number
CN102775745A
CN102775745A CN2012102474198A CN201210247419A CN102775745A CN 102775745 A CN102775745 A CN 102775745A CN 2012102474198 A CN2012102474198 A CN 2012102474198A CN 201210247419 A CN201210247419 A CN 201210247419A CN 102775745 A CN102775745 A CN 102775745A
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pbt
flame
glass fibre
high cti
separated out
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Inventor
郭建鹏
才勇
张强
汤俊杰
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Shanghai Rizhisheng New Technology Development Co Ltd
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Shanghai Rizhisheng New Technology Development Co Ltd
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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
    • B29C48/03—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
    • B29C48/04—Particle-shaped
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a flame-retardant glass fiber enhanced PBT (polybutylece terephthalate) composition with a high CTI (comparative tracking index) and a low precipitating property and preparation of the flame-retardant glass fiber enhanced PBT composition. The composition comprises the following components in weight: 35-70% of PBT, 1-8% of compatilizer, 1-12% of complex flame-retardant master batch, 20-45% of glass fiber, 0.1-1% of anti-oxygen agent and 0.1-1% of lubricant dispersant. The component materials are weighed according to the weight ratio and put into a high mixing machine to mix for 2-5 minutes; the materials are discharged, and extruded by a double-screw extruder to be pelletized; and the processing temperature is 215-235 DEG C, and the rotational frequency of the screw is 30-40HZ. Compared with the prior art, the composition disclosed by the invention has the advantages that the CTI value is high, the flame-retardant precipitating property is low, the environmental-protection is realized, the overall performance is balanced, and the like, can replace congeneric products produced by foreign companies, and achieves domestication of the products.

Description

High CTI, the low property separated out flame-proof glass fibre strengthen PBT compsn and preparation thereof
Technical field
The present invention relates to flame-proof glass fibre and strengthen the PBT field of materials, be specifically related to a kind of high CTI, the low property separated out flame-proof glass fibre enhancing PBT composition and method of making the same.
Background technology
In recent years; The electric industrial boom of China; Increasing demand to the fire-retardant enhancement engineering plastics of high electric insulation increases, all need be with the engineering plastic materials with good comprehensive mechanical properties, flame retardant properties and electrical insulation capability like low-voltage vacuum contactor, isolating switch, earth leakage protective device, connector, low-tension switch, the electric element of thin-walled etc.In this product scope, the consumption of polyester is very big.Yet because the relative industry of development of fire retardant relatively lags behind concerning the requirement that material improves day by day, a variety of fire retardants join mechanical property, the electrical insulation capability that can greatly reduce material in the material.For example, phase ratio creepage tracking index (CTI) drops to 200V even lower from 600V, and in addition, along with the enforcement of RoHs of European Union and WEEE instruction, traditional bromine is that flame-retardant system can not satisfy this requirement, and the use of some fire retardant simultaneously also can be restricted.
Summary of the invention
The objective of the invention is to overcome the defective that above-mentioned prior art exists, provide a kind of high CTI, the low property separated out flame-proof glass fibre to strengthen the PBT composition and method of making the same.This flame-proof glass fibre strengthens the PBT compsn and has high CTI value, the low fire retardant property separated out, halogen-free environmental, and advantages such as over-all properties equilibrium can substitute the like product that offshore company produces, and have realized the production domesticization of this series products.
The objective of the invention is to realize through following technical scheme:
The present invention relates to a kind of high CTI, the low property separated out flame-proof glass fibre enhancing PBT compsn, comprise each component of following weight percent content:
PBT 35～70％，
Compatilizer 1～8%,
Compositional flame-retardant master batch 1～12%,
Spun glass 20～45%,
Oxidation inhibitor 0.1～1%,
Lubrication dispersing agent 0.1～1%.
Preferably, the limiting viscosity of said PBT is 0.8～1.5dL/g.
Preferably, said compositional flame-retardant master batch comprises each component of following weight percent content: deironing red phosphorus master batch 50%; Antimigration agent 25%; High CTI auxiliary agent 25%.
Preferably, said spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface.
Preferably, said oxidation inhibitor is Hinered phenols antioxidant.
Preferably, said lubrication dispersing agent is a silicone.
The invention still further relates to a kind of aforesaid high CTI, the low property separated out flame-proof glass fibre enhancing PBT preparation of compositions method, be specially: said each component is put into high-speed mixer and mixing by weight ratio, discharging, the twin screw extruder extruding pelletization gets final product.
Preferably, the said blended time is 2～5 minutes.
Preferably, the extrusion temperature of said twin screw extruder is 210～235 ℃, and the screw rod revolution is at 30～40HZ.
Compared with prior art, the present invention has following beneficial effect:
1, adopt compositional flame-retardant master batch system, compare with traditional fire-retardant master granule, compositional flame-retardant master batch system has following characteristics: 1) comprehensive mechanical property is higher; 2) can CTI be brought up to 650V from 400V; 3) overcome the product surface that common red phosphorus moves under certain condition, under the effect of oxygen G&W, finally to form the mordant phosphorus of metallic article be the defective of acidic substance to red phosphorus then.
2, the oxidation inhibitor that adds is that a kind of Hinered phenols antioxidant can improve compsn in the antioxidant property of the course of processing and the ageing resistance in the use.
3, adopt silicone as lubrication dispersing agent, improve the materials processed flowability, reduce frictional coefficient; Improve smooth property, under specific processing conditions, adopt dispersiveness better, the residence time is short; Shear weak slightly combination, prevent that fire retardant from decomposing, thereby guaranteed the steady quality of material.
4, have high CTI value, the low fire retardant property separated out, halogen-free environmental, over-all properties is balanced, can be widely used in the product of field of electronics such as contactor, earth leakage protective device, case for circuit breaker.
Embodiment
Below in conjunction with specific embodiment the present invention is elaborated.Following examples will help those skilled in the art further to understand the present invention, but not limit the present invention in any form.Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement.These all belong to protection scope of the present invention.
The limiting viscosity of the PBT that adopts in following examples and the Comparative Examples is 0.8～1.5dL/g; Spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface; Oxidation inhibitor is Hinered phenols antioxidant; Lubrication dispersing agent is a silicone.
Comparative Examples 1～3
Flame-proof glass fibre strengthens the PBT compsn, comprises each component of the weight percent content shown in the table 1; Its preparation method is following:
(1) takes by weighing raw material by the weight percent content shown in the table 1, put into high-speed mixer and mixing 2～5 minutes, discharging;
(2) above-mentioned mixed raw materials is added twin screw extruder, extruding pelletization, both said flame-proof glass fibre enhancing PBT compsn; Parameters such as the extrusion temperature of said twin screw extruder, screw rod revolution are as shown in table 2.
Embodiment 1～4
High CTI, the low property separated out flame-proof glass fibre strengthen the PBT compsn, comprise each component of the weight percent content shown in the table 1; Its preparation method is following:
(1) takes by weighing raw material by the weight percent content shown in the table 1, put into high-speed mixer and mixing 2～5 minutes, discharging; Compositional flame-retardant master batch in the table 1 comprises each component of following weight percent content: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%;
(2) above-mentioned mixed raw materials is added twin screw extruder, extruding pelletization, both said high CTI, the low property separated out flame-proof glass fibre enhancing PBT compsn; Parameters such as the extrusion temperature of said twin screw extruder, screw rod revolution are as shown in table 2.
The formula for raw stock of table 1 Comparative Examples 1～3 and embodiment 1～4
Table 2
Figure BDA00001894863600032
Embodiment 5, performance test
Adopt the ASTM standard,, carry out the performance test contrast the composition sample that embodiment 1～4 and Comparative Examples 1～3 make.The test performance contrast is as shown in table 3:
Table 3
Can know that by table 3 embodiment 1 compares with Comparative Examples 1,2,3, explain that the high CTI that adopts compositional flame-retardant master batch system of the present invention to make, the low property separated out flame-proof glass fibre strengthen the PBT compsn, have following some advantage:
(1) comprehensive mechanical property is higher: on mechanical performance indexs such as tensile strength, flexural strength, modulus in flexure, shock strength, all obtain bigger raising;
(2) the CTI value is higher: CTI is brought up to 650V from 400V;
(3) pH value that obtains of corrosion test becomes neutrality by acidity; Explain that the compositional flame-retardant master batch system that the present invention adopts has overcome the product surface that common red phosphorus moves in traditional fire-retardant master granule system under certain condition, under the effect of oxygen G&W, finally to form the mordant phosphorus of metallic article be the defective of acidic substance to red phosphorus then.
In sum, compsn of the present invention has high CTI value, the low fire retardant property separated out, halogen-free environmental, and advantages such as over-all properties equilibrium can be widely used in the product of field of electronics such as contactor, earth leakage protective device, case for circuit breaker.

Claims (9)

1. a high CTI, the low property separated out flame-proof glass fibre strengthen the PBT compsn, it is characterized in that, comprise each component of following weight percent content:
PBT 35～70％，
Compatilizer 1～8%,
Compositional flame-retardant master batch 1～12%,
Spun glass 20～45%,
Oxidation inhibitor 0.1～1%,
Lubrication dispersing agent 0.1～1%.
2. high CTI according to claim 1, the low property separated out flame-proof glass fibre strengthen the PBT compsn, it is characterized in that the limiting viscosity of said PBT is 0.8～1.5dL/g.
3. high CTI according to claim 1, the low property separated out flame-proof glass fibre strengthen the PBT compsn, it is characterized in that said compositional flame-retardant master batch comprises each component of following weight percent content: deironing red phosphorus master batch 50%; Antimigration agent 25%; High CTI auxiliary agent 25%.
4. high CTI according to claim 1, the low property separated out flame-proof glass fibre strengthen the PBT compsn, it is characterized in that, said spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface.
5. high CTI according to claim 1, the low property separated out flame-proof glass fibre strengthen the PBT compsn, it is characterized in that said oxidation inhibitor is Hinered phenols antioxidant.
6. high CTI according to claim 1, the low property separated out flame-proof glass fibre strengthen the PBT compsn, it is characterized in that said lubrication dispersing agent is a silicone.
7. a high CTI as claimed in claim 1, the low property separated out flame-proof glass fibre strengthen PBT preparation of compositions method; It is characterized in that said preparation method is specially: said each component is put into high-speed mixer and mixing, discharging by weight ratio; The twin screw extruder extruding pelletization gets final product.
8. high CTI according to claim 7, the low property separated out flame-proof glass fibre strengthen PBT preparation of compositions method, it is characterized in that the said blended time is 2～5 minutes.
9. high CTI according to claim 7, the low property separated out flame-proof glass fibre strengthen PBT preparation of compositions method, it is characterized in that the extrusion temperature of said twin screw extruder is 210～235 ℃, and the screw rod revolution is at 30～40HZ.
CN2012102474198A 2012-07-17 2012-07-17 Flame-retardant glass fiber enhanced PBT (polybutylece terephthalate) composition with high CTI (comparative tracking index) and low precipitating property and preparation thereof Pending CN102775745A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103435979A (en) * 2012-12-19 2013-12-11 安徽科聚新材料有限公司 Low temperature-resistant and halogen-free flame retardant PBT composite material and preparation method thereof
CN105694396A (en) * 2016-04-28 2016-06-22 无锡智谷锐拓技术服务有限公司 Preparation method for plastic with conductivity enhanced

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102040807A (en) * 2009-10-22 2011-05-04 上海日之升新技术发展有限公司 High-glowing filament environmental-friendly flame retardant reinforced PBT (Polybutylece Terephthalate) composite material and preparation method thereof
CN102382464A (en) * 2011-09-07 2012-03-21 上海日之升新技术发展有限公司 High-CTI (comparative tracking index) value and low-corrosivity red phosphorus flame-retarding glass fiber reinforced PA66 (polyamide 66) material and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102040807A (en) * 2009-10-22 2011-05-04 上海日之升新技术发展有限公司 High-glowing filament environmental-friendly flame retardant reinforced PBT (Polybutylece Terephthalate) composite material and preparation method thereof
CN102382464A (en) * 2011-09-07 2012-03-21 上海日之升新技术发展有限公司 High-CTI (comparative tracking index) value and low-corrosivity red phosphorus flame-retarding glass fiber reinforced PA66 (polyamide 66) material and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103435979A (en) * 2012-12-19 2013-12-11 安徽科聚新材料有限公司 Low temperature-resistant and halogen-free flame retardant PBT composite material and preparation method thereof
CN103435979B (en) * 2012-12-19 2016-01-20 安徽科聚新材料有限公司 Low temperature resistant halogen-free anti-flaming PBT composite and preparation method thereof
CN105694396A (en) * 2016-04-28 2016-06-22 无锡智谷锐拓技术服务有限公司 Preparation method for plastic with conductivity enhanced

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Application publication date: 20121114