CN109722023A - A kind of electrophoresis paint high temperature resistant conduction PPO/PA alloy material and preparation method thereof - Google Patents
A kind of electrophoresis paint high temperature resistant conduction PPO/PA alloy material and preparation method thereof Download PDFInfo
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- CN109722023A CN109722023A CN201811635153.8A CN201811635153A CN109722023A CN 109722023 A CN109722023 A CN 109722023A CN 201811635153 A CN201811635153 A CN 201811635153A CN 109722023 A CN109722023 A CN 109722023A
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Abstract
The invention discloses a kind of electrophoresis paint high temperature resistant conduction PPO/PA alloy materials and preparation method thereof, are specifically made of the raw material of following parts by weight: 15-60 parts of PPO resin, 20-60 parts of PA resin, 3-15 parts of chopped carbon fiber, 3-10 parts of silicon carbide whisker, 1-5 parts of conductive black, 3-10 parts of toughener.The high temperature resistant conduction PPO/PA alloy material obtained according to the technical solution of the present invention, its advantage is shown: preparing conductive agglomerate first with PA resin, silicon carbide whisker and conductive black, then alloy material is prepared with PPO resin alloy, so that dispersibility of the conductive black in resin matrix is more uniform, the electric conductivity of material is substantially increased；Silicon carbide whisker also improves the toughness of alloy material, the synergistic effect with carbon fiber makes the heat distortion temperature of material also increase as toughened and reinforced unit simultaneously.Preparation process of the present invention is simple, low in cost, can meet the electrophoresis of product lacquer craftwork.
Description
Technical field
The invention belongs to technical field of polymer materials, and in particular to a kind of high temperature resistant conduction PPO/PA alloy material and its
Preparation method.
Background technique
Polyphenylene oxide (PPO), poly- 2, the 6- dimethyl-Isosorbide-5-Nitrae phenylate of alias, with good mechanical property, chemical stability,
Dielectric properties, heat resistance and anti-flammability are a kind of high performance thermoplastic engineering plastics.But PPO molecule chain rigidity is big, it is right
Notch shock is very sensitive, and additionally, due to its melt viscosity with higher, injection molding is difficult, therefore, general in the market
Predominantly Noryl, abbreviation MPPO or MPPE can substantially improve processing performance, improve stress crack resistant and impact property,
Reduce cost.Nylon has excellent performance as one kind, one of widely used thermoplastic engineering plastic, with good processing stream
Dynamic property, but due to the presence of hydrogen bond, keep its hygroscopic, poor dimensional stability.Utilize the heat resistance of PPO, dimensional stability knot
The well processed mobility of nylon resin is closed, PPO/PA alloy material is widely used in auto parts and components, such as mud guard, fender
Deng, also become develop one of faster plastic alloy in recent years.
During automobile production, vehicle body spray painting cost accounts for about the 50% of vehicle body cost, paints online spray according to electrophoresis
It applies, can not only save the cost of spray painting, pollution of the solvent to environment can also be reduced, while can also be to avoid traditional complicated procedures of forming
Influence to spray painting effect.However, on the one hand on-line spray technique requires PPO/PA alloy material to have the baking temperature of resistance to electrophoresis
(200-210℃)；On the other hand PPO/PA alloy is also required to conducting function needed for electrophoresis.Patent 2012102418569
The alloy material of high temperature resistant conduction PPO/PA6 a kind of is disclosed, antimony-doped tin oxide conduct is coated using silicon oxide fibre surface
Conductive agent prepares the PPO/PA6 alloy for being applicable to on-line spray, but this method preparation process is complicated, long flow path, obtains
Alloy material mechanical property is not also high.
In order to prepare conducting polymer materials, conductive agent to be often added in resin matrix, these conductive agents are mainly
Conductive black, carbon nanotube, chopped carbon fiber, metal conductive agent etc., the addition of conductive agent certainly will will affect the power of composite material
Learn performance.Silicon carbide whisker is as a kind of nanometer monocrystalline fiber, with very high elasticity modulus and mechanical strength and well
Thermal stability is a kind of excellent composite material activeness and quietness agent.The present invention PPO/PA alloy modified by silicon carbide whisker
Not only preparation process is simple, low in cost for material, and have both excellent electric conductivity and high-fire resistance, it can be achieved that component it is direct
Online electrostatic spraying.
Summary of the invention
The purpose of the present invention is to provide it is a kind of can electrophoresis the high temperature resistant conduction PPO/PA alloy material of paint.
The technical scheme adopted by the invention to achieve the purpose is as follows:
A kind of electrophoresis the high temperature resistant conduction PPO/PA alloy material of paint, percentage, including following component:
The PPO resin is selected from blue star LXR035, LXR040 or LXR045.
The PA resin is the combination of one or more of PA6, PA66, PA46, PA56, PA6T, PA9T etc..
The chopped carbon fiber is that length is 6-12mm, and 5-12 μm of diameter, bulk density is the short carbon of 300-700g/L
Fibre section.
The diameter of the silicon carbide whisker is that 1.5 μm of D <, draw ratio L/D are 20:1-30:1.
The conductive black is oil factor >=200mL/100g, specific surface area 50-1000m2/ g, partial size >=30 μm.
The toughener is one or more of combinations of SEBS, SEBS-g-MAH and POE-g-MAH.
It further include compatilizer, antioxidant or filler in the composite material.
Above-mentioned electrophoresis paint high temperature resistant conduction PPO/PA alloy material preparation method, comprising the following steps:
(1) dry after first mixing PA resin, silicon carbide whisker and conductive black, it is placed in squeeze out in double screw extruder and make
Grain；
(2) then by the conductive agglomerate in above-mentioned steps (1) mixed with PPO, toughener and other auxiliary agents (if any) and
Dry-mixed 3-5min in high speed mixer is uniformly mixed；
(3) by above-mentioned mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion main spout and
Side spout obtains the PPO/ of the high temperature resistant conduction after the series of processes such as melting extrusion, granulation, drying process
PA alloy material, wherein extruder screw diameter be 35mm, draw ratio L/D be 40, screw speed 200-400rpm/min,
Extruder temperature of each section is between 250-300 DEG C.
Compared with prior art, the method have the advantages that:
It is matrix the invention firstly uses PA resin, first prepares conductive agglomerate with silicon carbide whisker and conductive black, then
Bicontinuous structure is prepared by blending extrusion with PPO, chopped carbon fiber.On the one hand the addition of silicon carbide whisker can promote conduction
Carbon black is evenly dispersed in resin matrix, improves the electric conductivity and conductivity uniformity energy of material；On the other hand can make
The mechanical property of material is improved for toughened and reinforced unit, while the heat distortion temperature that material can be improved is cooperateed with carbon fiber.
Specific embodiment
Below by specific embodiment, the present invention is described further, and the embodiment is merely to illustrate this hair
It is bright rather than limiting the invention.
The embodiment of the present invention is raw materials used are as follows:
PPO resin: blue star LXR040；
PA resin: the PA66EPR27 of Henan table mountain Shen Ma company；
Chopped carbon fiber: chopped length 6mm, diameter is 8 μm, bulk density 400g/L, commercially available；
Silicon carbide whisker: 1 μm of diameter, draw ratio L/D is 25:1, commercially available；
Conductive black: oil factor 280mL/100g, specific surface area 770m2/ g, the conductive black that partial size is 50 μm are commercially available；
Compatilizer: PPO grafted maleic anhydride PPO-g-MAh, it is commercially available；
Toughener: SEBS-g-MAH, it is commercially available；
Antioxidant: 168 compound of hindered phenol antioxygen 1010 and phosphite ester antioxidant.
Properties of product test:
Notch impact strength: press ISO179-1 standard testing, 23 DEG C.
Heat distortion temperature: press ISO75-2 standard testing, 0.45MPa, 120 DEG C/h.
Sheet resistance: press 60093 standard testing of IEC, 23 DEG C.
Embodiment 1
(1) 53.7 parts of raw material PA66 resin, 3 parts of silicon carbide whisker and 2 parts of conductive black are first weighed by weight percentage, into
Drying is blended in row, is placed in extruding pelletization in double screw extruder；
(2) by the conductive agglomerate and 23 parts of PPO resin, 3 parts of compatilizer, 5 parts of toughener, antioxidant in above-mentioned steps (1)
0.3 part of mixing and the dry-mixed 3-5min in high speed mixer, are uniformly mixed.
(3) by above-mentioned steps (2) mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion
Main spout and side spout so that carbon fiber parts by weight be 10 parts, wherein extruder screw diameter be 35mm, major diameter
It is 40 than L/D, main-machine screw revolving speed is 200-300rpm/min, extruder temperature of each section: 220 DEG C of an area, 250 DEG C of 2nd area, three
255 DEG C of area, 260 DEG C of 4th area, 275 DEG C of 5th area, 275 DEG C of 6th area, 275 DEG C of 7th area, by melting extrusion, granulation, drying process etc.
After series of processes, the PPO/PA alloy material of the high temperature resistant conduction is obtained, test result is shown in Table 1.
Embodiment 2
(1) 51.7 parts of raw material PA66 resin, 6 parts of silicon carbide whisker and 2 parts of conductive black are first weighed by weight percentage, into
Drying is blended in row, is placed in extruding pelletization in double screw extruder；
(2) by the conductive agglomerate and 22 parts of PPO resin, 3 parts of compatilizer, 5 parts of toughener, antioxidant in above-mentioned steps (1)
0.3 part of mixing and the dry-mixed 3-5min in high speed mixer, are uniformly mixed.
(3) by above-mentioned steps (2) mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion
Main spout and side spout so that carbon fiber parts by weight be 10 parts, wherein extruder screw diameter be 35mm, major diameter
It is 40 than L/D, main-machine screw revolving speed is 200-300rpm/min, extruder temperature of each section: 220 DEG C of an area, 250 DEG C of 2nd area, three
255 DEG C of area, 260 DEG C of 4th area, 275 DEG C of 5th area, 275 DEG C of 6th area, 275 DEG C of 7th area, by melting extrusion, granulation, drying process etc.
After series of processes, the PPO/PA alloy material of the high temperature resistant conduction is obtained, test result is shown in Table 1.
Embodiment 3
(1) 50.7 parts of raw material PA66 resin, 6 parts of silicon carbide whisker and 3 parts of conductive black are first weighed by weight percentage, into
Drying is blended in row, is placed in extruding pelletization in double screw extruder；
(2) by the conductive agglomerate and 20 parts of PPO resin, 3 parts of compatilizer, 5 parts of toughener, antioxidant in above-mentioned steps (1)
0.3 part of mixing and the dry-mixed 3-5min in high speed mixer, are uniformly mixed.
(3) by above-mentioned steps (2) mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion
Main spout and side spout so that carbon fiber parts by weight be 12 parts, wherein extruder screw diameter be 35mm, major diameter
It is 40 than L/D, main-machine screw revolving speed is 200-300rpm/min, extruder temperature of each section: 220 DEG C of an area, 250 DEG C of 2nd area, three
255 DEG C of area, 260 DEG C of 4th area, 275 DEG C of 5th area, 275 DEG C of 6th area, 275 DEG C of 7th area, by melting extrusion, granulation, drying process etc.
After series of processes, the PPO/PA alloy material of the high temperature resistant conduction is obtained, test result is shown in Table 1.
Embodiment 4
(1) 47.7 parts of raw material PA66 resin, 10 parts of silicon carbide whisker and 3 parts of conductive black are first weighed by weight percentage,
Blending drying is carried out, extruding pelletization in double screw extruder is placed in；
(2) by the conductive agglomerate and 19 parts of PPO resin, 3 parts of compatilizer, 5 parts of toughener, antioxidant in above-mentioned steps (1)
0.3 part of mixing and the dry-mixed 3-5min in high speed mixer, are uniformly mixed.
(3) by above-mentioned steps (2) mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion
Main spout and side spout so that carbon fiber parts by weight be 12 parts, wherein extruder screw diameter be 35mm, major diameter
It is 40 than L/D, main-machine screw revolving speed is 200-300rpm/min, extruder temperature of each section: 220 DEG C of an area, 250 DEG C of 2nd area, three
255 DEG C of area, 260 DEG C of 4th area, 275 DEG C of 5th area, 275 DEG C of 6th area, 275 DEG C of 7th area, by melting extrusion, granulation, drying process etc.
After series of processes, the PPO/PA alloy material of the high temperature resistant conduction is obtained, test result is shown in Table 1.
Comparative example 1
(1) 20 parts of PPO resin, 50.7 parts of PA66 resin are weighed by weight percentage, 3 parts of conductive black, silicon carbide whisker 6
Part, 3 parts of compatilizer, 5 parts of toughener, 0.3 part of antioxidant mixing and the dry-mixed 3-5min in high speed mixer are uniformly mixed.
(2) by above-mentioned steps (1) mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion
Main spout and side spout so that carbon fiber parts by weight be 12 parts, wherein extruder screw diameter be 35mm, major diameter
It is 40 than L/D, main-machine screw revolving speed is 200-300rpm/min, extruder temperature of each section: 220 DEG C of an area, 250 DEG C of 2nd area, three
255 DEG C of area, 260 DEG C of 4th area, 275 DEG C of 5th area, 275 DEG C of 6th area, 275 DEG C of 7th area, by melting extrusion, granulation, drying process etc.
After series of processes, the PPO/PA alloy material of the high temperature resistant conduction is obtained, test result is shown in Table 1.
Comparative example 2
(1) 23 parts of PPO resin, 50.7 parts of PA66 resin are weighed by weight percentage, 3 parts of conductive black, 6 parts of compatilizer,
5 parts of toughener, 0.3 part of antioxidant mixing and the dry-mixed 3-5min in high speed mixer, are uniformly mixed.
(2) by above-mentioned steps (1) mixed raw material and chopped carbon fiber be respectively placed in meshing co rotating twin screw extrusion
Main spout and side spout so that carbon fiber parts by weight be 12 parts, wherein extruder screw diameter be 35mm, major diameter
It is 40 than L/D, main-machine screw revolving speed is 200-300rpm/min, extruder temperature of each section: 220 DEG C of an area, 250 DEG C of 2nd area, three
255 DEG C of area, 260 DEG C of 4th area, 275 DEG C of 5th area, 275 DEG C of 6th area, 275 DEG C of 7th area, by melting extrusion, granulation, drying process etc.
After series of processes, the PPO/PA alloy material of the high temperature resistant conduction is obtained, test result is shown in Table 1.
The performance test results of 1 high temperature resistant conduction PPO/PA alloy of table
It can be seen that from the test result in table 1 by being prepared first with PA66 resin and silicon carbide whisker, conductive black
Then conductive agglomerate can substantially improve carbon black in resin matrix by double screw extruder extruding pelletization with PPO resin
Dispersing uniformity, to improve materials conductive and conductivity uniformity energy；The addition of silicon carbide whisker can not only promote conductive charcoal
The black compatible degree with resin matrix is also used as toughened and reinforced unit and improves the notch impact strength of material, while also improving
The heat distortion temperature of material.Therefore, the present invention be both able to satisfy electrophoresis the temperature of Qi Suoxu, can also improve PPO/PA alloy material
The mechanical property of material.
Claims (9)
1. a kind of electrophoresis the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: percentage, including such as
Lower component:
2. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
PPO resin be selected from blue star LXR035, LXR040 or LXR045.
3. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
PA resin be one or more of PA6, PA66, PA46, PA56, PA6T, PA9T etc. combination.
4. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
Chopped carbon fiber be length be 6-12mm, 5-12 μm of diameter, bulk density be 300-700g/L short carbon fiber be sliced.
5. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
The diameter of silicon carbide whisker be 1.5 μm of D <, draw ratio L/D be 20:1-30:1.
6. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
Conductive black be oil factor >=200mL/100g, specific surface area 50-1000m2/ g, partial size >=30 μm.
7. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
Toughener be SEBS, SEBS-g-MAH and POE-g-MAH one or more of combinations.
8. a kind of electrophoresis as described in claim 1 the high temperature resistant conduction PPO/PA alloy material of paint, it is characterised in that: it is described
Composite material in further include compatilizer, antioxidant or filler.
Electrophoresis described in 9. claim 1-8 is one of any the preparation method of the high temperature resistant conduction PPO/PA alloy material of paint,
It is characterized in that, comprising the following steps:
(1) dry after first mixing PA resin, silicon carbide whisker and conductive black, it is placed in squeeze out in double screw extruder and make
Grain；
(2) then the conductive agglomerate in above-mentioned steps (1) is mixed with other raw materials in addition to carbon fiber and in high speed mixing
Dry-mixed 3-5min in machine is uniformly mixed；
(3) above-mentioned mixed raw material and chopped carbon fiber are respectively placed in the main spout and side feed of meshing co rotating twin screw extrusion
Material mouth, after the series of processes such as melting extrusion, granulation, drying process, the PPO/PA for obtaining the high temperature resistant conduction is closed
Golden material, wherein extruder screw diameter is 35mm, and draw ratio L/D is 40, screw speed 200-400rpm/min, is squeezed out
Machine temperature of each section is between 250-300 DEG C.
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Cited By (3)
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| CN111073277A (en) * | 2019-12-19 | 2020-04-28 | 上海普利特伴泰材料科技有限公司 | PA/PPO alloy plastic capable of being sprayed on line and preparation method thereof |
| CN111607215A (en) * | 2020-05-29 | 2020-09-01 | 江苏仟乙科技有限公司 | High-temperature-resistant conductive PPO and preparation method thereof |
| CN116925534A (en) * | 2022-03-29 | 2023-10-24 | 珠海万通特种工程塑料有限公司 | Nylon composition with adjustable dielectric constant and preparation method and application thereof |
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