CN102732002A - Flame-retardant glass fiber reinforced PA66 (Poly A 66)/PA11 alloy composition with high CTI (Comparative Tracking lndex) value and preparation method of composition - Google Patents
Flame-retardant glass fiber reinforced PA66 (Poly A 66)/PA11 alloy composition with high CTI (Comparative Tracking lndex) value and preparation method of composition Download PDFInfo
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- CN102732002A CN102732002A CN2012102475311A CN201210247531A CN102732002A CN 102732002 A CN102732002 A CN 102732002A CN 2012102475311 A CN2012102475311 A CN 2012102475311A CN 201210247531 A CN201210247531 A CN 201210247531A CN 102732002 A CN102732002 A CN 102732002A
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
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Abstract
The invention relates to a flame-retardant glass fiber reinforced PA66 (Poly A 66)/PA11 alloy composition with a high CTI (Comparative Tracking lndex) value and a preparation method of the composition. The composition comprises the following components in percentage by weight: 20% to 41% of PA 11, 20% to 41% of PA66, 0 to 15% of compound flame-retardant masterbatch, 20% to 40% of glass fibers, 0.1% to 1% of antioxygen, and 0.1% to 1% of lubricating dispersing agent. The preparation method of the composition comprises the following steps of: mixing the components which are weighted according to the percentage by weight in a high mixing machine for 2 to 5 minutes, and then discharging the mixed components; and extruding and granulating the mixed components through a twin-screw extruder, wherein the processing temperature ranges from 225 to 260 DEG C, and the revolution rate of each screw is 30 to 40 Hz. Compared with the prior art, the flame-retardant glass fiber reinforced PA66/PA11 alloy composition has the advantages of high CTI value, low precipitation, environment friendliness and balance in comprehensive performance, and can be widely applied to products in the field of electronic appliances such as contactors as well as housings of breakers.
Description
Technical field
The present invention relates to a kind of high CTI value flame-proof glass fibre and strengthen the PA66/PA11 alloy composite, especially relate to a kind of high CTI value flame-proof glass fibre and strengthen PA66/PA11 alloy composite and preparation method thereof.
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 polyamide (PA) is maximum.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 object of the invention is exactly to provide a kind of high CTI value flame-proof glass fibre to strengthen PA66/PA11 alloy composite and preparation method thereof for the defective that overcomes above-mentioned prior art existence.Material of the present invention has high CTI value, the low property separated out, environmental protection, and over-all properties is balanced, can be widely used in field of electronics such as contactor, earth leakage protective device, case for circuit breaker.
The present invention can realize through following technical scheme:
The present invention relates to a kind of high CTI value flame-proof glass fibre and strengthen the PA66/PA11 alloy composite, comprise each component of following weight percentage:
PA11 20~41%,
PA66 20~41%,
Compositional flame-retardant master batch 0~15%,
Spun glass 20~40%,
Oxidation inhibitor 0.1~1%,
Lubrication dispersing agent 0.1~1%.
Preferably, said PA66 is a polycaprolactam, and its limiting viscosity is 2.4dL/g.
Preferably, the limiting viscosity of said PA11 is 2.4dL/g.
Preferably, said compositional flame-retardant master batch is mixed by the 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 an alkali free glass fibre, and handle through silane coupling agent on its surface.
Preferably, said oxidation inhibitor is Hinered phenols antioxidant.
Preferably, said lubrication dispersing agent is a silicone.
The invention still further relates to the preparation method of above-mentioned high CTI value flame-proof glass fibre enhancing PA66/PA11 alloy composite, comprise the steps: to take by weighing each component by said weight percent content; Put into high-speed mixer and mixing 2~5 minutes, the twin screw extruder extruding pelletization is used in discharging then, and processing temperature is 225~260 ℃, and the screw rod slewing rate is 30~40Hz.
Compared with prior art, the present invention has following beneficial effect:
1, adopt compositional flame-retardant master batch system that following characteristics are arranged: 1) comprehensive mechanical property is higher; 2) can CTI be brought up to 660V from 390V; 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 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 lubricant, 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.
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.
Comparative Examples 1~3
The raw material and the weight percent content thereof of Comparative Examples 1~3 are as shown in table 1; Take by weighing said raw material by said weight percent content; Put into high-speed mixer and mixing 2~5 minutes, the twin screw extruder extruding pelletization is used in discharging then, makes high CTI value, the low property separated out flame-proof glass fibre enhancing PA66/PA11 alloy composite; Wherein processing temperature is 225~260 ℃, and the screw rod slewing rate is 30~40Hz; Concrete processing situation is as shown in table 2.
Embodiment 1~6
Raw material and the weight percent content thereof of embodiment 1~6 are as shown in table 1; Take by weighing said raw material by said weight percent content; Put into high-speed mixer and mixing 2~5 minutes, the twin screw extruder extruding pelletization is used in discharging then, makes high CTI value, the low property separated out flame-proof glass fibre enhancing PA66/PA11 alloy composite; Wherein processing temperature is 225~260 ℃, and the screw rod slewing rate is 30~40Hz; Concrete processing situation is as shown in table 2.
In the table 1, PA66 is a polycaprolactam, and its limiting viscosity is 2.4dL/g, and to be 2.4dL/g compositional flame-retardant master batch mixed by the component of following weight percent content the limiting viscosity of PA11: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%, adopt compositional flame-retardant master batch system that following characteristics are arranged: 1) comprehensive mechanical property is higher; 2) can CTI be brought up to 660V from 390V; 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.Spun glass is an alkali free glass fibre, and handle through silane coupling agent on its surface.Oxidation inhibitor is Hinered phenols antioxidant, can improve compsn in the antioxidant property of the course of processing and the ageing resistance in the use.Lubrication dispersing agent is that silicone improves the materials processed flowability, reduces frictional coefficient, improves smooth property, under specific processing conditions, adopts dispersiveness better, and residence time weak point is sheared weak slightly combination, prevents the fire retardant decomposition, thereby has guaranteed the steady quality of material.
Table 1
Table 2
Embodiment 5, performance test
The high CTI value flame-proof glass fibre that above-mentioned Comparative Examples 1~3 and embodiment 1~6 are made strengthens the PA66/PA11 alloy composite and carries out the performance test contrast, adopts the ASTM standard.The test performance contrast is as described in Table 3:
Table 3
Drawn by table 3: compare with Comparative Examples 1~3, embodiment 1~6 makes compsn and has better tensile strength, flexural strength, modulus in flexure and shock strength.Compsn of the present invention has high CTI value, the low property separated out, environmental protection, and over-all properties is balanced, can be widely used in field of electronics such as contactor, case for circuit breaker, and good prospects for application is arranged.
Claims (8)
1. a high CTI value flame-proof glass fibre strengthens the PA66/PA11 alloy composite, it is characterized in that said compsn comprises each component of following weight percent content:
PA11 20~41%,
PA66 20~41%,
Compositional flame-retardant master batch 0~15%,
Spun glass 20~40%,
Oxidation inhibitor 0.1~1%,
Lubrication dispersing agent 0.1~1%.
2. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite, it is characterized in that said PA66 is a polycaprolactam, and its limiting viscosity is 2.4dL/g.
3. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite, it is characterized in that the limiting viscosity of said PA11 is 2.4dL/g.
4. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite, it is characterized in that said compositional flame-retardant master batch is mixed by the component of following weight percent content: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%.
5. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite, it is characterized in that said spun glass is an alkali free glass fibre, and handle through silane coupling agent on its surface.
6. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite, it is characterized in that said oxidation inhibitor is Hinered phenols antioxidant.
7. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite, it is characterized in that said lubrication dispersing agent is a silicone.
8. one kind prepares the method that high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PA11 alloy composite; It is characterized in that, comprise the steps: to take by weighing each component, put into high-speed mixer and mixing 2~5 minutes by said weight percent content; Discharging; Use the twin screw extruder extruding pelletization then, processing temperature is 225~260 ℃, and the screw rod slewing rate is 30~40Hz.
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CN2012102475311A CN102732002A (en) | 2012-07-17 | 2012-07-17 | Flame-retardant glass fiber reinforced PA66 (Poly A 66)/PA11 alloy composition with high CTI (Comparative Tracking lndex) value and preparation method of composition |
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CN2012102475311A CN102732002A (en) | 2012-07-17 | 2012-07-17 | Flame-retardant glass fiber reinforced PA66 (Poly A 66)/PA11 alloy composition with high CTI (Comparative Tracking lndex) value and preparation method of composition |
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CN102558839A (en) * | 2011-12-21 | 2012-07-11 | 上海普利特复合材料股份有限公司 | Low odor, anti-static electricity, red phosphorus flame retardant thermoplastic composition and preparation method thereof |
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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 |
CN102558839A (en) * | 2011-12-21 | 2012-07-11 | 上海普利特复合材料股份有限公司 | Low odor, anti-static electricity, red phosphorus flame retardant thermoplastic composition and preparation method thereof |
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WO2022043115A1 (en) | 2020-08-28 | 2022-03-03 | Basf Se | Polyamide composition with inclined plane tracking resistance |
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