CN110240787A - Low warpage PBT composite of a kind of dimensionally stable and preparation method thereof - Google Patents
Low warpage PBT composite of a kind of dimensionally stable and preparation method thereof Download PDFInfo
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- CN110240787A CN110240787A CN201910383057.7A CN201910383057A CN110240787A CN 110240787 A CN110240787 A CN 110240787A CN 201910383057 A CN201910383057 A CN 201910383057A CN 110240787 A CN110240787 A CN 110240787A
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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
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2289—Oxides; Hydroxides of metals of cobalt
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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
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight: 60~80 parts by weight of polybutylene terephthalate (PBT)；12~15 parts by weight of polyether-ether-ketone；8~10 parts by weight of maleic anhydride grafted polyethylene；2~4 parts by weight of toughener；1~3 parts by weight of antioxidant；2~4 parts by weight of dispersing agent；3~5 parts by weight of myristic acid cardamom ester.The low warpage PBT composite of dimensionally stable of the invention improves the internal structure of PBT plastic, with excellent mechanical performance, heat resistance and warpage preventing energy by optimizing to its chemical component in microcosmic degree.
Description
Technical field
The present invention relates to a kind of plastics, more particularly to a kind of low warpage PBT composite of dimensionally stable and its preparation side
Method.
Background technique
PBT (polybutylene terephthalate (PBT) Polybutylene Terephthalates) is in general engineering plastic
A kind with fastest developing speed the latest is industrialized, although arriving 1970s ability industrialized production, since PBT is with excellent
Different comprehensive performance, good molding processibility and excellent cost performance, quickly hot issue markets.PBT has high-fire resistance, tough
Property, fatigue durability, self-lubricating, low-friction coefficient, weatherability, water absorption rate are low, still kept in wet environment various physical property (including
Electrical property), electrical insulating property, can crystallize rapidly under low temperature, good forming ability.In automobile manufacturing field, PBT is widely used in production
The components such as carburetion device assembly, mud guard, spark plug terminal plate.
But volume resistance, the dielectric loss of PBT are big, heat-proof water, bases, acids, oils but vulnerable to chlorinated hydrocabon corrode, it is water-fast
Guards escorting prisoners, notch impact strength is low, and inprocess shrinkage is big.Therefore it is most of using fiberglass reinforced or electrodeless mineral-filled modification, it stretches
Intensity, bending strength can be improved one times or more, and heat distortion temperature also greatly improves, can the long-term work at 140 DEG C.But glass
Product vertical, horizontal shrinking percentage is inconsistent after enhancing, easily makes product that warpage occur.
Summary of the invention
In view of the above shortcomings, it is an object of the invention to develop the low warpage PBT composite of a dimensionally stable,
With excellent high temperature resistant, excellent weatherability, chemical-resistant and warpage preventing performance.
Technical solution of the present invention is summarized as follows:
A kind of low warpage PBT composite of dimensionally stable, wherein the material including following parts by weight:
Preferably, the low warpage PBT composite of the dimensionally stable, wherein the toughener include 30~
40wt% carboxylic acrylonitrile butadiene rubber latex and 60~70wt% haloflex.
Preferably, the low warpage PBT composite of the dimensionally stable, wherein the dispersing agent include 60~
70wt% calcium stearate and 30~40wt% ethylene-acrylic acid copolymer.
Preferably, the low warpage PBT composite of the dimensionally stable, wherein the antioxidant include 20~
30wt%N- benzylamine phenylenediamine and 70~80wt% thiobisphenol.
Preferably, the low warpage PBT composite of the dimensionally stable, wherein further include the zeolite of 7~9 parts by weight.
Preferably, the low warpage PBT composite of the dimensionally stable, wherein further include the oleic acid of 3~5 parts by weight.
Preferably, the low warpage PBT composite of the dimensionally stable, wherein further include the oxidation of 1~3 parts by weight
Cobalt.
Preferably, the low warpage PBT composite of the dimensionally stable, wherein the partial size of the zeolite be 60~
80nm。
Preferably, the low warpage PBT composite of the dimensionally stable, wherein the equal molecule of the number of the polyether-ether-ketone
Amount is 3200~3400.
The preparation method of the low warpage PBT composite of a kind of dimensionally stable, wherein the preparation method includes following steps
It is rapid:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be the PBT composite.
The beneficial effects of the present invention are:
(1) the low warpage PBT composite of dimensionally stable of the invention, by being optimized to its chemical component, microcosmic
The internal structure that PBT plastic is improved in degree, with excellent mechanical performance, heat resistance and warpage preventing energy.
(2) present invention improves impact strength, the heat resistance of PBT by the way that maleic anhydride grafted polyethylene is added；By adding
Enter the viscosity that myristic acid cardamom ester adjusts PBT, improves its mobile performance；Carboxylic acrylonitrile butadiene rubber latex and haloflex cooperate with conduct
Toughener, so that PBT flexility reaches best；Calcium stearate and ethylene-acrylic acid copolymer collaboration improve the dispersion of filler
Performance, reducing surface tension to improve the stability of PBT prevents its warpage；It is effectively improved by addition zeolite existing
The warpage issues of PBT modified material, while improving the high temperature resistant of PBT material, chemical resistance；By the way that cobalt oxide is added into one
Step improves its weather resistance, warpage preventing performance.
Specific embodiment
The present invention will be further described in detail below with reference to the embodiments, to enable those skilled in the art referring to specification
Text can be implemented accordingly.
This case proposes a kind of low warpage PBT composite of dimensionally stable, wherein the material including following parts by weight:
Polybutylene terephthalate (PBT) has extraordinary chemical stability, mechanical strength, electrical insulating property, is drawn by moisture absorption
The electrical property risen varies less, and insulation voltage is very high, and forming stability and dimensional accuracy are excellent；Polyether-ether-ketone radioresistance,
Insulating properties stabilization, hydrolysis, resistance to compression is corrosion-resistant, and heatproof, thermal stability are good, superelevation is heat-resisting；It is poly- by the way that maleic anhydride grafting is added
Impact strength, the heat resistance of ethylene improvement PBT；The viscosity that PBT is adjusted by the way that myristic acid cardamom ester is added, improves its flowing
Performance.
As the another embodiment of this case, wherein toughener includes 30~40wt% carboxylic acrylonitrile butadiene rubber latex and 60~70wt%
Haloflex.Compatible, split-phase after solidification before carboxylic acrylonitrile butadiene rubber latex solidifies forms " island structure ", can absorb impact energy,
Do not reduce heat resistance substantially again；Haloflex improves soft, elastic, toughness, the polyethylene chlorinty as the toughener used time
It should control between 25%-40%, at rubber-like substance, since double bond structure is not present in CPE, so with the blend of its toughening
Resistance to ag(e)ing it is good；Carboxylic acrylonitrile butadiene rubber latex and haloflex collaboration are used as toughener, so that PBT flexility reaches best.
As the another embodiment of this case, wherein dispersing agent includes 60~70wt% calcium stearate and 30~40wt% ethylene-
Acrylic copolymer.Calcium stearate and ethylene-acrylic acid copolymer collaboration improve the dispersion performance of filler, reduce surface tension,
To improve the stability of PBT, its warpage is prevented.
As the another embodiment of this case, wherein antioxidant includes 20~30wt%N- benzylamine phenylenediamine and 70~80wt%
Thiobisphenol.N- benzylamine phenylenediamine and thiobisphenol are compound with consonance effect well, live because N- benzylamine phenylenediamine is eliminated
Sprinkle alkyl diradical and peroxy radical, thiobisphenol make PBT is kept under 300 DEG C of melt temperatures PBT do not occur xanthochromia with
Stablize PBT melt viscosity.
As the another embodiment of this case, wherein further include the zeolite of 7~9 parts by weight.It is effectively improved by the way that zeolite is added
The warpage issues of existing PBT modified material, while improving the high temperature resistant of PBT material, chemical resistance.
As the another embodiment of this case, wherein further include the oleic acid of 3~5 parts by weight.Why lubricant, which can play lubrication, is made
With being to reduce the friction of plastic melt because of its addition, oleic acid and polymer have good compatibility, it is in polymer
Portion plays a part of cohesive force between reduction polymer molecule, so as to improve the internal frictional heat generation of plastic melt and the flowing of melt
Property, reduce frictional force.
As the another embodiment of this case, wherein further include the cobalt oxide of 1~3 parts by weight.It is further by the way that cobalt oxide is added
Improve its weather resistance, warpage preventing performance.
As the another embodiment of this case, wherein the partial size of zeolite is 60~80nm.Sized zeolite particles be less than 60nm, then due to
The granularity is too small, and easily leading to it can not be dispersed well in the sticky system of macromolecule, forms part and reunites, to make
Obtain the uniformity decline of the PBT finally obtained；If partial size is greater than 80nm, since granularity is larger, it is self-possessed heavier, this makes
It is easily deposited on bottom in sticky polymeric system, so that the nano particle quantity drop being actually scattered in system
It is low, affect the weather-proof of PBT, high temperature resistant, chemical resistance.
As the another embodiment of this case, wherein the number-average molecular weight of polyether-ether-ketone is 3200~3400.The molecule of polymer
It measures and plays a very important role to the self performance tool of polymer, the polymer of different molecular weight then has entirely different mechanics
And chemical property.The number-average molecular weight of polyether-ether-ketone used in this case should be limited, if number-average molecular weight is less than 3200g/mol,
System viscosity decline, the machining property of polymer are greatly reduced, and PBT embodies inclined software feature, though flexibility is preferable, its
Mechanical strength and heat resistance be not up to requirement；If number-average molecular weight is greater than 3200g/mol, system viscosity increases, and gathers simultaneously
The mechanical performance for closing object increases, but the turbidity of system is also increase accordingly, this results in the resistance to compression of PBT exponentially to decline.
The preparation method of the low warpage PBT composite of a kind of dimensionally stable, wherein preparation method includes the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be the PBT composite.
Specific embodiment and comparative example is listed below:
Embodiment 1:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 30wt% carboxylic acrylonitrile butadiene rubber latex and 70wt% haloflex；Dispersing agent includes 60wt% stearic acid
Calcium and 40wt% ethylene-acrylic acid copolymer；Antioxidant includes 20wt%N- benzylamine phenylenediamine and 80wt% thiobisphenol；Zeolite
Partial size be 60nm；The number-average molecular weight of polyether-ether-ketone is 3200.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be PBT composite.
Embodiment 2:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 32wt% carboxylic acrylonitrile butadiene rubber latex and 68wt% haloflex；Dispersing agent includes 63wt% stearic acid
Calcium and 37wt% ethylene-acrylic acid copolymer；Antioxidant includes 24wt%N- benzylamine phenylenediamine and 76wt% thiobisphenol；Zeolite
Partial size be 70nm；The number-average molecular weight of polyether-ether-ketone is 3300.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be PBT composite.
Embodiment 3:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 40wt% carboxylic acrylonitrile butadiene rubber latex and 60wt% haloflex；Dispersing agent includes 70wt% stearic acid
Calcium and 30wt% ethylene-acrylic acid copolymer；Antioxidant includes 30wt%N- benzylamine phenylenediamine and 70wt% thiobisphenol；Zeolite
Partial size be 80nm；The number-average molecular weight of polyether-ether-ketone is 3400.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be PBT composite.
Comparative example 1:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 30wt% carboxylic acrylonitrile butadiene rubber latex and 70wt% haloflex；Dispersing agent includes 60wt% stearic acid
Calcium and 40wt% ethylene-acrylic acid copolymer；Antioxidant includes 20wt%N- benzylamine phenylenediamine and 80wt% thiobisphenol；Zeolite
Partial size be 60nm；The number-average molecular weight of polyether-ether-ketone is 3200.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be PBT composite.
Comparative example 2:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener is carboxylic acrylonitrile butadiene rubber latex；Dispersing agent includes 60wt% calcium stearate and 40wt% ethylene-acrylic acid copolymer
Object；Antioxidant includes 20wt%N- benzylamine phenylenediamine and 80wt% thiobisphenol；The partial size of zeolite is 60nm；The number of polyether-ether-ketone
Average molecular weight is 3200.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, zeolite, oleic acid, oxidation
Cobalt is stirred to obtain the first mixture；
2) above-mentioned mixed material is put into double screw extruder, through melting, mixing, extrusion, cooling, drying, pelletizing, packet
Dress obtains PBT composite.
Comparative example 3:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 32wt% carboxylic acrylonitrile butadiene rubber latex and 68wt% haloflex；Dispersing agent includes 63wt% stearic acid
Calcium and 37wt% ethylene-acrylic acid copolymer；Antioxidant is N- benzylamine phenylenediamine；The partial size of zeolite is 70nm；Polyether-ether-ketone
Number-average molecular weight is 3300.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through molten
Melt, be kneaded, squeezing out, cooling down, drying, pelletizing, being packaged to be PBT composite.
Comparative example 4:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 32wt% carboxylic acrylonitrile butadiene rubber latex and 68wt% haloflex；Dispersing agent is calcium stearate；Antioxygen
Agent includes 24wt%N- benzylamine phenylenediamine and 76wt% thiobisphenol；The partial size of zeolite is 70nm；The equal molecule of the number of polyether-ether-ketone
Amount is 3300.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, N- benzylamine phenylenediamine, thiobisphenol, zeolite, oleic acid, cobalt oxide stirring are mixed
Conjunction obtains the first mixture；2) above-mentioned mixed material is put into double screw extruder, through melting, mixing, extrusion, cooling, done
Dry, pelletizing is packaged to be PBT composite.
Comparative example 5:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 40wt% carboxylic acrylonitrile butadiene rubber latex and 60wt% haloflex；Dispersing agent includes 70wt% stearic acid
Calcium and 30wt% ethylene-acrylic acid copolymer；Antioxidant includes 30wt%N- benzylamine phenylenediamine and 70wt% thiobisphenol；Zeolite
Partial size be 80nm；The number-average molecular weight of polyether-ether-ketone is 3400.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol oleic acid,
Cobalt oxide is stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through melting, mixing,
Extrusion, drying, pelletizing, is packaged to be PBT composite at cooling.
Comparative example 6:
A kind of low warpage PBT composite of dimensionally stable, the material including following parts by weight:
Toughener includes 40wt% carboxylic acrylonitrile butadiene rubber latex and 60wt% haloflex；Dispersing agent includes 70wt% stearic acid
Calcium and 30wt% ethylene-acrylic acid copolymer；Antioxidant includes 30wt%N- benzylamine phenylenediamine and 70wt% thiobisphenol；Zeolite
Partial size be 80nm；The number-average molecular weight of polyether-ether-ketone is 3400.
A kind of preparation method of the low warpage PBT composite of dimensionally stable, preparation method include the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester,
Carboxylic acrylonitrile butadiene rubber latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, boiling
Stone, oleic acid are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, through melting, mixing,
Extrusion, drying, pelletizing, is packaged to be PBT composite at cooling.
The performance test results of embodiment and comparative example are listed below:
It can be seen that by examples detailed above, the material obtained not only has excellent mechanical performance, and heat resistance warpage preventing
Performance is good compared with the material of comparative example.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details.
Claims (10)
1. a kind of low warpage PBT composite of dimensionally stable, which is characterized in that the material including following parts by weight:
2. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that the toughener includes
30~40wt% carboxylic acrylonitrile butadiene rubber latex and 60~70wt% haloflex.
3. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that the dispersing agent includes
60~70wt% calcium stearate and 30~40wt% ethylene-acrylic acid copolymer.
4. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that the antioxidant includes
20~30wt%N- benzylamine phenylenediamine and 70~80wt% thiobisphenol.
5. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that further include 7~9 weight
The zeolite of part.
6. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that further include 3~5 weight
The oleic acid of part.
7. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that further include 1~3 weight
The cobalt oxide of part.
8. the low warpage PBT composite of dimensionally stable according to claim 5, which is characterized in that the partial size of the zeolite
For 60~80nm.
9. the low warpage PBT composite of dimensionally stable according to claim 1, which is characterized in that the polyether-ether-ketone
Number-average molecular weight is 3200~3400.
10. the preparation method of the low warpage PBT composite of described in any item dimensionally stables according to claim 1~9, feature
It is, the preparation method includes the following steps:
1) by polybutylene terephthalate (PBT), polyether-ether-ketone, maleic anhydride grafted polyethylene, myristic acid cardamom ester, carboxyl
NBR latex, haloflex, calcium stearate, ethylene-acrylic acid copolymer, N- benzylamine phenylenediamine, thiobisphenol, zeolite, oil
Acid, cobalt oxide are stirred to obtain the first mixture；2) above-mentioned mixed material is put into double screw extruder, is melted, is mixed
Refining, cooling, drying, pelletizing, is packaged to be the PBT composite at extrusion.
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