CN106633705A - Liquid crystal polyester compound as well as preparation method and application thereof - Google Patents
Liquid crystal polyester compound as well as preparation method and application thereof Download PDFInfo
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- CN106633705A CN106633705A CN201611253550.XA CN201611253550A CN106633705A CN 106633705 A CN106633705 A CN 106633705A CN 201611253550 A CN201611253550 A CN 201611253550A CN 106633705 A CN106633705 A CN 106633705A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/54—Additives having no specific mesophase characterised by their chemical composition
- C09K19/542—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- Chemical Kinetics & Catalysis (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses a liquid crystal polyester compound as well as a preparation method and application thereof. The liquid crystal polyester compound disclosed by the invention comprises the following components in parts by weight: 60-90 parts of liquid crystal polyester resins, 1-5 parts of reinforced resins and 10-40 parts of fillers. According to the liquid crystal polyester compound disclosed by the invention, the liquid crystal polyester resins are taken as basic resin components and modified by the contained reinforced resins, fillers and the like, so that the liquid crystal polyester compound disclosed by the invention is endowed with high weld line strength and mechanical strength, the preparation process is highly controllable in process, the prepared material is stable in performance, and the production cost is effectively reduced.
Description
Technical field
The invention belongs to technical field of polymer composite materials, and in particular to a kind of liquid crystal polyester compound and its preparation side
Method and application.
Background technology
Liquid-crystal polyester resin (LCP) is due to excellent mobile performance, electrical insulation capability, heat resistance, dimensionally stable
Performance etc., therefore it is widely used in the fields such as electronics, electric, automobile, aerospace.Printed circuit board (PCB), food can also be used for
Packaging, artificial satellite electronic unit, electric and automobile component, even as spacecraft component materials.
In the numerous applications of LCP, one of them extremely important and most widely used field is as electronics electricity
Device part, due to the mobile performance that LCP materials are excellent, heat resistance and dimensional stability so as to precision electronic components can be made,
But requirement of the precision electronic components to material is also being improved constantly, and different shape, size, the part of performance are to material property
Requirement is also different, wherein the wide variety of annular element in electronic devices and components, particularly accurate and tiny ring part
Part will necessarily produce weld bond in injection, this be annular element on be easiest to occur defect and damage a bit, therefore ring
Shape part does not require nothing more than manufacture raw material and has high mechanical properties, more requires that material has high weld mark strength.Conventional LCP materials
It is quick when being molded due to it although complying fully with the requirement of circulating electron part in the performances such as mechanical strength, stability
The characteristics of cooling, causes its weld mark strength low, and therefore the annular element manufactured by it easily produces defect and even damage.
Between disadvantages described above and problem, this patent improves liquid crystal polyester compound by reasonable combination of filling a prescription, process optimization
Weld mark strength, while keeping it that there is high-mechanical property to meet need of the growing electronic apparatus part to material
Ask.
The content of the invention
It is an object of the invention to overcome the shortcomings of that above-mentioned prior art is present, there is provided a kind of liquid crystal polyester compound and its
Preparation method and application, it is low to solve available liquid crystal polyester resin weld mark strength, and the undesirable technical problem of mechanical performance.
In order to realize foregoing invention purpose, one aspect of the present invention, there is provided a kind of liquid crystal polyester compound.The liquid crystal gathers
Ester complexes include the component of following parts by weight：
Liquid-crystal polyester resin 60-90 parts
Reinforced resin 1-5 part
Filler 10-40 parts.
A kind of another aspect of the present invention, there is provided preparation method of liquid crystal polyester compound.The preparation method include as
Lower step：
Each component raw material is weighed respectively according to the constituent species and content contained by liquid crystal polyester compound of the present invention；
The each component raw material for weighing is carried out into melting mixing extrusion process.
The another aspect of the embodiment of the present invention, there is provided a kind of liquid crystal polyester compound of the present invention or preparation method of the present invention
The liquid crystal polyester compound of preparation is in circulating electron part, precision connector, plug connector, camera module or electronic devices and components
Application.
Compared with prior art, liquid crystal polyester compound resin Composition based on liquid-crystal polyester resin of the present invention, leads to
The components such as contained reinforced resin, filler are crossed modified to it, so as to give liquid crystal polyester compound of the present invention excellent weld mark
Intensity and mechanical strength.
Liquid crystal polyester compound preparation method of the present invention according to the constituent species contained by liquid crystal polyester compound of the present invention and
Each component is directly carried out melting mixing extrusion process by ratio so that each component can be made fully dispersed and each other
With the excellent weld mark strength of the liquid crystal polyester compound of so that extrusion and mechanical strength.In addition, preparation method technique of the present invention
Easily-controllable, the strong mechanical property of preparation effectively reduces its production cost.
There is excellent weld mark strength and mechanical strength, the production for meeting just because of liquid crystal polyester compound of the present invention
Require, effectively extend its range of application, be such as particularly well-suited to circulating electron component materials, effectively increase corresponding product quality
With the stability of work.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
The weight of embodiment of the present invention Related Component noted in the disclosure not only may refer to the concrete of each component
Content, it is also possible to represent the proportionate relationship of weight between each component, therefore, as long as according to embodiment of the present invention specification relevant group
The content divided is scaled up or reduced within embodiment of the present invention specification scope of disclosure.Specifically, the present invention is real
It can be mass unit known to the chemical fields such as μ g, mg, g, kg to apply the weight described in a specification.
On the one hand, the embodiment of the present invention provides a kind of liquid crystal polyester compound.The liquid crystal polyester compound includes following
The component of parts by weight：
Liquid-crystal polyester resin 60-90 parts
Reinforced resin 1-5 part
Filler 10-40 parts.
So, the present embodiment liquid crystal polyester compound resin Composition based on liquid-crystal polyester resin, by contained increasing
The components such as strong resin, filler are modified to it, strong so as to give the high mechanical strength of liquid crystal polyester compound of the present invention and weld mark
Degree.
Specifically, in above-mentioned liquid crystal polyester compound embodiment, the liquid-crystal polyester resin is poly- from Wholly aromatic liquid crystal
Ester resin.In one embodiment, all aromatic liquid crystal polyester resin number-average molecular weight is 10000-100000.The scope
Molecular resin measurer has can give the excellent mobility of compound and processing characteristics.It is above-mentioned complete as one embodiment of the invention
Aromatic liquid crystal polyester resin is at least containing following any one repetitive：
(1) from the repetitive of aromatic diol：-O-Ar-O-；
(2) from the repetitive of aromatic diamine：-HN-Ar-NH-；
(3) from the repetitive of aromatic series azanol：-HN-Ar-O-；
(4) from the repetitive of aromatic dicarboxylic acid：-OC-Ar-CO-；
(5) from the repetitive of aromatic hydroxy-carboxylic：-O-Ar-CO-；
(6) from the repetitive of aromatic amine yl carboxylic acid：-HN-Ar-CO-.
Wherein, the Ar groups in above-mentioned (1) to the repetitive shown in (6) be penylene, biphenylene, naphthalene, two penylenes by
The aromatic compound that the element of carbon or non-carbon is bonded any one, or for penylene, biphenylene, naphthalene, two penylenes by carbon or
The aromatic compound that more than one hydrogen in the aromatic compound that the element of non-carbon is bonded is replaced by other elements.
Thus all aromatic liquid crystal polyester resin of construction unit monomer manufacture has excellent resistance to elevated temperatures and mobility, processing
Property.Above-mentioned liquid-crystal polyester resin can with but be not only prepared as follows acquisition：
First the first monomer and second comonomer are carried out into polycondensation reaction, then the polycondensation reaction is synthesized into Wholly aromatic liquid crystal
Polyester prepolyer carries out solid state polycondensation and prepares.
Wherein, first monomer is at least one in free aromatic diol, aromatic diamine, aromatic series azanol,
The second comonomer is at least one in aromatic dicarboxylic acid, aromatic hydroxy-carboxylic, aromatic amine yl carboxylic acid.It is specifically fragrant
Fragrant race's glycol, aromatic diamine, aromatic series azanol, aromatic dicarboxylic acid, aromatic hydroxy-carboxylic, aromatic amine yl carboxylic acid
To be but not only from conventional respective compound.
In a further embodiment, above-mentioned first monomer and/or second comonomer be before above-mentioned polycondensation reaction is carried out, in advance
Pre-processed by acylation agent, to improve reactive monomeric.Specifically, the acylation agent is at least in acetyl group agent
Kind.Specifically such as pre-process the first monomer and/or second comonomer to improve the first monomer when acylation agent is acetyl group agent
And/or the acetylizad monomer of second comonomer reactivity.
During polycondensation reaction synthesis Wholly aromatic liquid crystal polyester prepolyer to be carried out solid state polycondensation, by solid phase
Polycondensation reaction carries the molecular weight of product, obtains the suitable liquid-crystal polyester resin of molecular weight.Need in the solid state polycondensation process
Heat, such as can adopt can provide heat energy using heating plate, hot blast, high temperature fluid method to solid state polycondensation.For
The accessory substance of solid state polycondensation is removed, using inert gas purge or vacuum removing is utilized.
Reinforced resin contained by above-mentioned liquid crystal polyester compound plays modified synergic and makees with filler to liquid crystal polyester compound
With the high weld mark strength of the above-mentioned liquid crystal polyester compound of imparting, while with excellent mechanical strength and processability.One embodiment
In, the reinforced resin be polyolefin copolymer, in a particular embodiment, the polyolefin copolymer be ethylene copolymer, ethene-
Acrylic copolymer and they with epoxide, one or more composition of the graft copolymer of maleic anhydride.
The polyolefin copolymer of the selection can improve the synergistic modifying function of remaining filler, further improve liquid crystal polyester compound
Weld mark strength and mechanical strength.
In one embodiment, above-mentioned filler is that glass fibre, talcum powder, mica, wollastonite, calcium carbonate, clay, glass are micro-
One or more kinds of mixtures in pearl.Wherein, the preferred size of glass fibre is diameter 7-15um, long 50-
150um, any one preferable particle size scope is 250-800 mesh in talcum powder, mica, wollastonite, calcium carbonate, clay, glass microballoon.
Therefore, the logical reinforced resin of above-mentioned liquid crystal polyester compound, filler are made to resin Composition based on liquid-crystal polyester resin
With so as to give liquid crystal polyester compound of the present invention high weld mark strength, while with excellent mechanical strength and processability.
On the other hand, a kind of preparation method of liquid crystal polyester compound in above-described embodiment is embodiments provided.
In one embodiment, the liquid crystal polyester compound preparation method comprises the steps：
Step S01：As described above the constituent species and content contained by liquid crystal polyester compound weigh respectively each component
Raw material；
Step S02：The each component raw material for weighing is carried out into melting mixing extrusion process.
Wherein, as described above liquid crystal gathers for the content of each component for weighing in above-mentioned steps S01 and selected composition
Described in ester complexes, in order to save length, will not be described here.
In above-mentioned steps S02, each component raw material in the presence of the high pressure and hyperpyrexia that melting mixing is extruded it is fully dispersed simultaneously
Have an effect each other, so as to realize that liquid-crystal polyester resin is acted on so that Jing melting mixings extrusion obtains target product liquid
Brilliant polyester complexes, and give liquid crystal polyester compound there is high weld mark strength and mechanical strength.In one embodiment, institute
Melting mixing extrusion temperature is stated for 310-350 DEG C, so that each group is sufficiently mixed in the molten state uniform and abundant effect, is carried
The weld mark strength and mechanical strength and processability of high liquid crystal polyester compound.
In one embodiment, above-mentioned melting mixing extrusion can with but not only lead to weight-loss type automatic feeder and throw in original in proportion
Material, by double screw extruder melting mixing extrusion process is carried out.
In addition, before above-mentioned steps S02 are carried out, also including that each component raw material to weighing is dried process, such as exist
It is dried 4 hours at 130-160 DEG C.
After treating step S02, can also include that the liquid crystal polyester compound generated to melting mixing extrusion process draws
The subsequent steps such as bar, cooling, granulation.
Therefore, embodiment of the present invention liquid crystal polyester compound preparation method liquid crystal polyester compound institute as described above
Each component is directly carried out melting mixing extrusion process by the constituent species for containing and ratio so that each component can it is fully dispersed and that
Have an effect between this so that the liquid crystal polyester compound weld mark strength of extrusion and high mechanical strength.In addition, the preparation method
Technique is easily-controllable, the strong mechanical property of preparation, effectively reduces its production cost.
It is compound just because of liquid crystal polyester of the present invention on the basis of based on above-mentioned liquid crystal polyester compound and preparation method thereof
Thing has excellent weld mark strength and mechanical strength and processability, and production can reach requirement, effectively extends its application
Scope, the such as application in circulating electron part, precision connector, plug connector, camera module or electronic devices and components, especially fit
For being such as particularly well-suited to circulating electron component materials so that quality and ensure that it that the circulating electron part that it is prepared is produced
The stability of work.
Above-mentioned liquid crystal polyester compound and preparation method thereof is described in detail below in conjunction with specific embodiment.
Embodiment 1
Present embodiments provide a kind of liquid crystal polyester compound and preparation method thereof.Under the liquid crystal polyester compound includes
State the component and content of parts by weight in table 1.Wherein, liquid-crystal polyester resin average molecular weight is 45000, and talcous size is
400 mesh.
The preparation method of liquid crystal polyester compound is as follows：
S11. the preparation of liquid-crystal polyester resin：Resin structure unit be P-hydroxybenzoic acid, terephthalic acid (TPA), xenol,
6- hydroxyl -2- naphthoic acids and M-phthalic acid, acetylizing agent is acetic anhydride；
S12. according to the parts by weight described in embodiment 1 in table 1, the liquid-crystal polyester resin (Wholly aromatic liquid crystal that will be selected
Polyester resin, Jiangsu water special material Manufacturing Co., Ltd) 74 parts, ethylene copolymer1 part,
25 parts of talcum powder was in 130 DEG C of dryings 4 hours；
S13. by the dried liquid-crystal polyester resin of step S12, ethylene copolymerTalcum
Powder put into weight-loss type feeding machine, by feeding machine according to formula rate by raw material put into double screw extruder at 340 ± 10 DEG C
Melting mixing is carried out, then through extrusion, tie rod, cooling, granulation produces liquid crystal polyester compound.
Embodiment 2
Present embodiments provide a kind of liquid crystal polyester compound and preparation method thereof.Under the liquid crystal polyester compound includes
State the component and content of parts by weight in table 1.Wherein, liquid-crystal polyester resin average molecular weight is 45000, and talcous size is
400 mesh.
The preparation method of liquid crystal polyester compound is as follows：
S21. the preparation of liquid-crystal polyester resin：Resin structure unit be P-hydroxybenzoic acid, terephthalic acid (TPA), xenol,
6- hydroxyl -2- naphthoic acids and M-phthalic acid, acetylizing agent is acetic anhydride；
S22. according to the parts by weight described in embodiment 2 in table 1, the liquid-crystal polyester resin (Wholly aromatic liquid crystal that will be selected
Polyester resin, Jiangsu water special material Manufacturing Co., Ltd) 72 parts, ethylene copolymer3 parts,
25 parts of talcum powder was in 130 DEG C of dryings 4 hours；
S23. by the dried liquid-crystal polyester resin of step S22, ethylene copolymerTalcum
Powder put into weight-loss type feeding machine, by feeding machine according to formula rate by raw material put into double screw extruder at 320 ± 10 DEG C
Melting mixing is carried out, then through extrusion, tie rod, cooling, granulation produces liquid crystal polyester compound.
Embodiment 3
Present embodiments provide a kind of liquid crystal polyester compound and preparation method thereof.Under the liquid crystal polyester compound includes
State the component and content of parts by weight in table 1.Wherein, liquid-crystal polyester resin average molecular weight is 45000, and talcous size is
400 mesh.
The preparation method of liquid crystal polyester compound is as follows：
S31. the preparation of liquid-crystal polyester resin：Resin structure unit be P-hydroxybenzoic acid, terephthalic acid (TPA), xenol,
6- hydroxyl -2- naphthoic acids and M-phthalic acid, acetylizing agent is acetic anhydride；
S32. according to the parts by weight described in embodiment 3 in table 1, the liquid-crystal polyester resin (Wholly aromatic liquid crystal that will be selected
Polyester resin, Jiangsu water special material Manufacturing Co., Ltd) 70 parts, ethylene copolymer5 parts,
25 parts of talcum powder was in 130 DEG C of dryings 4 hours；
S33. by the dried liquid-crystal polyester resin of step S32, ethylene copolymerTalcum
Powder put into weight-loss type feeding machine, by feeding machine according to formula rate by raw material put into double screw extruder at 330 ± 10 DEG C
Melting mixing is carried out, then through extrusion, tie rod, cooling, granulation produces liquid crystal polyester compound.
Comparative example 1
A kind of liquid-crystal polyester resin compound is provided, it includes the component and content of the parts by weight in table 1 below.Its system
Preparation method of the Preparation Method with reference to embodiment 1.
The test of respective performances
The liquid-crystal polyester resin that the liquid crystal polyester compound and comparative example 1 that above-described embodiment 1 to embodiment 3 is provided is provided
Compound respectively as injection raw material, using injection moulding machine injection mo(u)lding, then by following examination criteria to its progressive
Can test and be tested respectively, test result is as described in Table 2：
(1) bending strength：Test by ASTM D-790.
(2) weld mark strength：Using mold injection molding, sample size 100 ± 1mm of length, 12.7 ± 0.1mm of width,
1.0 ± 0.1mm of thickness, plastisol enters grinding tool from sample two ends during injection, and weld bond is located at sample midpoint, after injection mo(u)lding
The bending strength of test sample, test condition is：Fulcrum span 40mm, pressure head radius 5mm, loading velocity 2mm/min.
Table 1
Table 2
With reference to above-mentioned table 2, embodiment 1-3 weld mark compared with the liquid-crystal polyester resin compound manufactured in comparative example 1 is strong
Degree is improved, while with higher mechanical strength, it is adaptable to manufacture circulating electron part.
Specific embodiment used herein is set forth to the principle and embodiment of the present invention, the explanation of embodiment
It is only intended to help and understands the method for the present invention and its core concept, the foregoing is only presently preferred embodiments of the present invention,
Not to limit the present invention, all any modification, equivalent and improvement made within the spirit and principles in the present invention etc.,
Should be included within the scope of the present invention.
Claims (10)
1. a kind of liquid crystal polyester compound, it is characterised in that including the component of following parts by weight：
Liquid-crystal polyester resin 60-90 parts
Reinforced resin 1-5 part
Filler 10-40 parts.
2. liquid crystal polyester compound according to claim 1, it is characterised in that：Described filler be glass fibre, talcum powder,
One or more kinds of mixtures in mica, wollastonite, calcium carbonate, clay, glass microballoon；And/or
The reinforced resin is polyolefin copolymer.
3. liquid crystal polyester compound according to claim 1 and 2, it is characterised in that：The liquid-crystal polyester resin is full virtue
Fragrant race's liquid-crystal polyester resin, all aromatic liquid crystal polyester resin number-average molecular weight is 10000-100000.
4. liquid crystal polyester compound according to claim 3, it is characterised in that：The all aromatic liquid crystal polyester resin is extremely
It is few to contain following any one repetitive：
-O-Ar-O-、-HN-Ar-NH-、-HN-Ar-O-、-OC-Ar-CO-、-O-Ar-CO-、-HN-Ar-CO-；
And the Ar groups in the repetitive are that penylene, biphenylene, naphthalene, two penylenes are bonded by the element of carbon or non-carbon
Aromatic compound any one, or the virtue being bonded by the element of carbon or non-carbon for penylene, biphenylene, naphthalene, two penylenes
The aromatic compound that more than one hydrogen in fragrant compounds of group is replaced by other elements；
The polyolefin copolymer be ethylene copolymer, ethylene-acrylic acid copolymer and they with epoxide, maleic anhydride
Graft copolymer one or more composition.
5. according to the arbitrary described liquid crystal polyester compound of claim 3-4, it is characterised in that：The Wholly aromatic liquid crystal polyester
Prepolymer is first the first monomer and second comonomer to be carried out into polycondensation reaction, then the polycondensation reaction is synthesized into Wholly aromatic liquid crystal
Polyester prepolyer carries out solid state polycondensation and prepares；Wherein, first monomer is free aromatic diol, aromatic series two
At least one in amine, aromatic series azanol, the second comonomer is aromatic dicarboxylic acid, aromatic hydroxy-carboxylic, aromatic amine
At least one in yl carboxylic acid.
6. liquid crystal polyester compound according to claim 5, it is characterised in that：First monomer and/or second comonomer
Pre-processed by acylation agent in advance.
7. liquid crystal polyester compound according to claim 6, it is characterised in that：The acylation agent is in acetyl group agent
At least one.
8. a kind of preparation method of liquid crystal polyester compound, comprises the steps：
Each component is weighed respectively according to the constituent species and content contained by the arbitrary described liquid crystal polyester compound of claim 1-7
Raw material；
The each component raw material for weighing is carried out into melting mixing extrusion process.
9. preparation method according to claim 8, it is characterised in that：The temperature of the melting mixing extrusion process is 310-
350℃。
10. the arbitrary described liquid crystal polyester compound of claim 1-7 or by the arbitrary described preparation method of claim 8-9
The liquid crystal polyester compound of preparation is in circulating electron part, precision connector, plug connector, camera module or electronic devices and components
Application.
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| TWI762713B (en) * | 2017-09-12 | 2022-05-01 | 日商寶理塑料股份有限公司 | Liquid crystalline resin composition for sliding wear-resistant member and sliding wear-resistant member using the same |
| WO2019065063A1 (en) * | 2017-09-29 | 2019-04-04 | ポリプラスチックス株式会社 | Liquid crystalline resin composition for sliding wear resistant member and sliding wear resistant member using same |
| JP6545416B1 (en) * | 2017-09-29 | 2019-07-17 | ポリプラスチックス株式会社 | Liquid crystalline resin composition for sliding wear resistant member and sliding wear resistant member using the same |
| CN116178905A (en) * | 2022-12-19 | 2023-05-30 | 珠海万通特种工程塑料有限公司 | Liquid crystal polyester composition and preparation method and application thereof |
| CN116178905B (en) * | 2022-12-19 | 2024-07-23 | 珠海万通特种工程塑料有限公司 | Liquid crystal polyester composition and preparation method and application thereof |
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