CN110172231A - A kind of refrigerant PBT resin composition and preparation method thereof - Google Patents

A kind of refrigerant PBT resin composition and preparation method thereof Download PDF

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CN110172231A
CN110172231A CN201910378082.6A CN201910378082A CN110172231A CN 110172231 A CN110172231 A CN 110172231A CN 201910378082 A CN201910378082 A CN 201910378082A CN 110172231 A CN110172231 A CN 110172231A
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refrigerant
resin composition
pbt resin
pbt
weight
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刘志刚
高东
赵鑫
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NANTONG KEPOLY ENGINEERING PLASTICS Co Ltd
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NANTONG KEPOLY ENGINEERING PLASTICS Co Ltd
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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
    • 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
    • C08K2201/006—Additives being defined by their surface area
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a kind of refrigerant PBT resin composition, the material including following parts by weight: 60~80 parts by weight of polybutylene terephthalate (PBT)；10~15 parts by weight of tetrafluoro-hexafluoroethylene copolymer fiber；4~7 parts by weight of organosilicon modified crylic acid resin；8~12 parts by weight of filler；3~6 parts by weight of compatilizer；2~4 parts by weight of antioxidant；1~3 parts by weight of lubricant.Refrigerant PBT resin composition of the invention improves the internal structure of PBT plastic, with excellent mechanical performance and refrigerant performance by optimizing to its chemical component in microcosmic degree.

Description

A kind of refrigerant PBT resin composition and preparation method thereof
Technical field
The present invention relates to a kind of plastics, more particularly to a kind of refrigerant PBT resin composition and preparation method thereof.
Background technique
Air-conditioning and our daily life are closely bound up, the owning amount of our Domestic Air-conditions today at least also 1,000,000,000 with On, and there is the air-conditioning of ten million platform or more to need to update every year, while the annual production of domestic (containing individual proprietorship, joint venture) Amount is all at 80,000,000 or more, it is understood that each air-conditioning needs a compressor motor, the effect of compressor motor is: following Ring refrigerant (freon, dichlorodifluoromethane), oil promote heat exchange.There is motor coil in the motor of compressor, it is wired in coil Ring framework, skeleton are as made of resin insulator material injection.
Applying for generally acknowledging both at home and abroad must satisfy in compressor motor resin insulator material: 1) one of insulating material It is divided into insoluble in refrigerant, oil (refrigerant, oiliness)；2) when rushing magnetic, the thin-walled position of skeleton is not broken (magnetize intensity)；3) sufficiently Ground is filled into the thin-walled position (the thin-walled mobility of material) of skeleton.
As air-conditioning technical develops to energy conservation and environmental protection direction, the electric current standard of compressor motor is from exchanging (AC) standard to straight Rheology frequency (DC) standard transformation, from distribution volume to volume transformation is concentrated, the transformation of standard greatly improves the spiral mode of coil The effective power of compressor motor reduces energy consumption, while magnetizing of being embodied in that compressor motor coil generates when magnetizing is strong Degree reduces 30% or more than exchange standard, then the resin insulator material continued to use always in the past is fiberglass reinforced 30%LCP (liquid crystal polymer), fiberglass reinforced 30%PPS (polyphenylene sulfide), LCP, PPS material belong to special engineering plastics as everybody knows, single Valence is very expensive, at present, due to the transformation of compressor motor standard, if reusing LCP, PPS material just seems performance It is superfluous, while air-conditioning DC frequency-changing standard or technology are implemented or introduced to our state compulsions, eliminates original exchange standard.
Trans-corporation, current foreign countries is directed to the transformation of compressor motor standard, competitively develops the refrigerant of excellent cost performance High temperature resistant enhances the insulating material that PBT (polybutylene terephthalate (PBT)) composite material is used for motor coil skeleton, however, A large amount of low molecule is had under heating status by conventional enhancing PBT or gas molecules are precipitated or volatilization, it is easy to be dissolved in cold In matchmaker's (freon, dichlorodifluoromethane), the refrigeration blockage of compressor can be caused, lead to compressor refrigeration effect failure.
Common composite flexible material product does not have refrigerant performance on the market at present, divides in refrigerant test The bad phenomenons such as layer, blistering, properties conservation rate is low after test, mass loss rate is higher.Therefore it is soft to study a kind of refrigerant Soft composite material seems most important to fill up the blank in market.
Summary of the invention
In view of the above shortcomings, it is an object of the invention to develop a refrigerant PBT resin composition, with excellent Different refrigerant performance, and mass loss rate is low.
Technical solution of the present invention is summarized as follows:
A kind of refrigerant PBT resin composition, wherein the material including following parts by weight:
Preferably, the refrigerant PBT resin composition, wherein the filler includes that 30~40wt% expands leech Stone and 60~70wt% fluorographite.
Preferably, the refrigerant PBT resin composition, wherein the compatilizer includes the Malaysia 60~70wt% Acid anhydrides grafted polystyrene and 30~40wt%SEBS.
Preferably, the refrigerant PBT resin composition, wherein the antioxidant includes 20~30wt% dioxane Base aminodithioformic acid copper and 70~80wt% copper dialkyldithiocarbamate.
Preferably, the refrigerant PBT resin composition, wherein the lubricant includes 60~70wt%, bis- sulphur Change molybdenum and 30~40wt% sulfurized olefin cotton oil.
Preferably, the refrigerant PBT resin composition, wherein further include the perfluoro polyether oil of 3~5 parts by weight.
Preferably, the refrigerant PBT resin composition, wherein further include the anhydrous sorbitol of 1~3 parts by weight Aliphatic ester.
Preferably, the refrigerant PBT resin composition, wherein further include the 2- thionaphthol of 1~3 parts by weight.
Preferably, the refrigerant PBT resin composition, wherein the ratio table of the expanded vermiculite and fluorographite Area is 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, wherein the preparation method includes the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol to be uniformly mixed, mixture passes through twin-screw Extruder is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw rod Revolving speed is 300~400 revs/min.
The beneficial effects of the present invention are:
(1) refrigerant PBT resin composition of the invention, by being optimized to its chemical component, in microcosmic degree The internal structure for improving PBT plastic, with excellent mechanical performance and refrigerant performance.
(2) present invention by be added tetrafluoro-hexafluoroethylene copolymer fiber high mechanical strength, improve PBT high temperature resistant, Fatigue durability and corrosion resistance；Improve the impact strength of PBT, water resistance, heat-resisting by the way that organosilicon modified crylic acid resin is added Property and refrigerant performance improve the refrigerant of PBT resin by the way that expanded vermiculite and fluorographite is added and performance be precipitated；Pass through Malaysia Acid anhydrides grafted polystyrene and SEBS collaboration are used as compatilizer, and collaboration improves the heat resistance and refrigerant performance of PBC；By adding Enter perfluoro polyether oil and improves PBT thermal stability, resistance to very high temperature, noninflammability, chemical stability and lubricity；By the way that dehydration mountain is added Pears alcohol fatty acid ester improves the compatibility of filler and polymer, prevents the sedimentation and cohesion of particle；Increased by the way that 2- thionaphthol is added The effect of plasticating of strong PBT, shortening is plasticated the time, and improves its refrigerant 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 refrigerant PBT resin composition, 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；Hexafluoropropylene (HFP)/tetrafluoroethylene (TFE) Copolymer fibre high mechanical strength, no creep, thermal expansion coefficient is small, rapid heat dissipation, it is for can be improved the resistance to height of PBT when improving PBT Temperature, fatigue durability and corrosion resistance.Improve the impact strength of PBT, water resistance, resistance to by the way that organosilicon modified crylic acid resin is added Hot and refrigerant performance.
As the another embodiment of this case, wherein filler includes that 30~40wt% expanded vermiculite and 60~70wt% are fluorinated stone Ink.Improve the refrigerant precipitation performance of PBT resin by the way that expanded vermiculite and fluorographite is added.
As the another embodiment of this case, wherein compatilizer includes 60~70wt% maleic anhydride grafted polystyrene and 30 ~40wt%SEBS.Maleic anhydride grafted polystyrene makes material have high polarity by introducing strongly polar reactive group And reactivity, it is a kind of polymer interface coupling agent, compatilizer, dispersion enhancing agents, hexafluoropropylene (HFP)/tetrafluoroethylene (TFE) can be greatly improved The compatibility of copolymer fibre and the dispersibility of filler, to improve PBT material mechanical strength and refrigerant performance；SEBS can be with The general polymer reaction containing amino or carboxyl can also react with containing carbonyl, acid anhydrides, epoxy group, generate graft copolymer, Improve the high-temperature-resistant high-pressure-resistant performance of PBT.It is used as compatilizer by maleic anhydride grafted polystyrene and SEBS collaboration, collaboration mentions The heat resistance and refrigerant performance of high PBC.
As the another embodiment of this case, wherein antioxidant include 20~30wt% copper dialkyldithiocarbamate and 70~80wt% copper dialkyldithiocarbamate.Copper dialkyldithiocarbamate and dialkyldithiocarbamacompositions Copper is compound to have consonance effect well, because copper dialkyldithiocarbamate eliminates active alkyl diradical and peroxide certainly By base, copper dialkyldithiocarbamate can extend butyl epoxy stearate oxidation induction period, to improve the anti-oxidant of PBT Performance, so that PBT keeps PBT that xanthochromia does not occur and stablizes PBT melt viscosity under 300 DEG C of melt temperatures.
As the another embodiment of this case, wherein lubricant includes that 60~70wt% molybdenum disulfide and 30~40wt% vulcanize Alkene cottonseed oil.Why lubricant can play lubricating action, be the addition because of it, reduce the friction of plastic melt, curing Molybdenum and sulfurized olefin cotton oil and polymer have good compatibility, it plays in polymeric inner and reduces in polymer molecule The effect of poly- power reduces frictional force so as to improve the internal frictional heat generation of plastic melt and the mobility of melt.
As the another embodiment of this case, wherein further include the perfluoro polyether oil of 3~5 parts by weight.By the way that perfluoropolyether is added Oil improves PBT thermal stability, resistance to very high temperature, noninflammability, chemical stability and lubricity.
As the another embodiment of this case, wherein further include the sorbitan fatty acid ester of 1~3 parts by weight.Pass through addition Sorbitan fatty acid ester improves the compatibility of filler and polymer, prevents the sedimentation and cohesion of particle.
As the another embodiment of this case, wherein further include the 2- thionaphthol of 1~3 parts by weight.Increased by the way that 2- thionaphthol is added The effect of plasticating of strong PBT, shortening is plasticated the time, and improves its refrigerant performance.
As the another embodiment of this case, wherein the specific surface area of expanded vermiculite and fluorographite is 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, wherein the preparation method includes the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol to be uniformly mixed, mixture passes through twin-screw Extruder is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw rod Revolving speed is 300~400 revs/min.
Specific embodiment and comparative example is listed below:
Embodiment 1:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 30wt% expanded vermiculite and 70wt% fluorographite；Compatilizer includes that the grafting of 60wt% maleic anhydride is poly- Styrene and 40wt%SEBS；Antioxidant includes 20wt% copper dialkyldithiocarbamate and 80wt% dialkyl dithio Carbamic acid copper；Lubricant includes 60wt% molybdenum disulfide and 40wt% sulfurized olefin cotton oil；Expanded vermiculite and fluorographite Specific surface area be 500m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol to be uniformly mixed, mixture passes through twin-screw Extruder is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw rod Revolving speed is 300~400 revs/min.
Embodiment 2:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 35wt% expanded vermiculite and 65wt% fluorographite；Compatilizer includes that the grafting of 62wt% maleic anhydride is poly- Styrene and 38wt%SEBS；Antioxidant includes 22wt% copper dialkyldithiocarbamate and 78wt% dialkyl dithio Carbamic acid copper；Lubricant includes 63wt% molybdenum disulfide and 37wt% sulfurized olefin cotton oil；Expanded vermiculite and fluorographite Specific surface area be 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol to be uniformly mixed, mixture passes through twin-screw Extruder is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw rod Revolving speed is 300~400 revs/min.
Embodiment 3:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 40wt% expanded vermiculite and 70wt% fluorographite；Compatilizer includes that the grafting of 70wt% maleic anhydride is poly- Styrene and 30wt%SEBS；Antioxidant includes 30wt% copper dialkyldithiocarbamate and 70wt% dialkyl dithio Carbamic acid copper；Lubricant includes 70wt% molybdenum disulfide and 30wt% sulfurized olefin cotton oil；Expanded vermiculite and fluorographite Specific surface area be 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol to be uniformly mixed, mixture passes through twin-screw Extruder is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw rod Revolving speed is 300~400 revs/min.
Comparative example 1:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 30wt% expanded vermiculite and 70wt% fluorographite；Compatilizer includes that the grafting of 60wt% maleic anhydride is poly- Styrene and 40wt%SEBS；Antioxidant includes 20wt% copper dialkyldithiocarbamate and 80wt% dialkyl dithio Carbamic acid copper；Lubricant includes 60wt% molybdenum disulfide and 40wt% sulfurized olefin cotton oil；Expanded vermiculite and fluorographite Specific surface area be 500m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, organosilicon modified crylic acid resin, maleic anhydride grafted polystyrene, SEBS, dialkyl group Aminodithioformic acid copper, copper dialkyldithiocarbamate, molybdenum disulfide, sulfurized olefin cotton oil, perfluoro polyether oil, mistake Water Span and 2- thionaphthol are uniformly mixed, and mixture is blended, is reacted by double screw extruder and extruding pelletization Obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, and screw speed is 300~400 revs/min.
Comparative example 2:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler is expanded vermiculite；Compatilizer includes 60wt% maleic anhydride grafted polystyrene and 40wt%SEBS；Antioxygen Agent includes 20wt% copper dialkyldithiocarbamate and 80wt% copper dialkyldithiocarbamate；Lubricant includes 60wt% molybdenum disulfide and 40wt% sulfurized olefin cotton oil；The specific surface area of expanded vermiculite and fluorographite is 500m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol to be uniformly mixed, mixture passes through twin-screw Extruder is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw rod Revolving speed is 300~400 revs/min.
Comparative example 3:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 35wt% expanded vermiculite and 65wt% fluorographite；Compatilizer is maleic anhydride grafted polystyrene； Antioxidant includes 22wt% copper dialkyldithiocarbamate and 78wt% copper dialkyldithiocarbamate；Lubricant packet Include 63wt% molybdenum disulfide and 37wt% sulfurized olefin cotton oil；The specific surface area of expanded vermiculite and fluorographite be 500~ 700m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, vulcanization alkene Hydrocarbon cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol are uniformly mixed, and mixture passes through twin-screw extrusion Machine is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw speed It is 300~400 revs/min.
Comparative example 4:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 35wt% expanded vermiculite and 65wt% fluorographite；Compatilizer includes that the grafting of 62wt% maleic anhydride is poly- Styrene and 38wt%SEBS；Antioxidant is copper dialkyldithiocarbamate；Lubricant include 63wt% molybdenum disulfide and 37wt% sulfurized olefin cotton oil；The specific surface area of expanded vermiculite and fluorographite is 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, molybdenum disulfide, sulfurized olefin cotton oil, perfluoropolyether Oil, sorbitan fatty acid ester and 2- thionaphthol are uniformly mixed, and mixture is blended by double screw extruder, is reacted and squeezed out Granulation obtains the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, and screw speed is 300~400 revs/min.
Comparative example 5:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 40wt% expanded vermiculite and 70wt% fluorographite；Compatilizer includes that the grafting of 70wt% maleic anhydride is poly- Styrene and 30wt%SEBS；Antioxidant includes 30wt% copper dialkyldithiocarbamate and 70wt% dialkyl dithio Carbamic acid copper；Lubricant is molybdenum disulfide；The specific surface area of expanded vermiculite and fluorographite is 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid It is acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, complete Perfluoroalkyl polyether oil, sorbitan fatty acid ester and 2- thionaphthol are uniformly mixed, and mixture is blended by double screw extruder, is reacted And extruding pelletization obtains the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, and screw speed is 300~400 Rev/min.
Comparative example 6:
A kind of refrigerant PBT resin composition, the material including following parts by weight:
Filler includes 40wt% expanded vermiculite and 70wt% fluorographite；Compatilizer includes that the grafting of 70wt% maleic anhydride is poly- Styrene and 30wt%SEBS；Antioxidant includes 30wt% copper dialkyldithiocarbamate and 70wt% dialkyl dithio Carbamic acid copper；Lubricant includes 70wt% molybdenum disulfide and 30wt% sulfurized olefin cotton oil；Expanded vermiculite and fluorographite Specific surface area be 500~700m2/g。
A kind of preparation method of refrigerant PBT resin composition, preparation method include the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) by the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic acid Acid anhydride grafted polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, sulphur Change alkene cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester to be uniformly mixed, mixture is total by double screw extruder Simultaneously extruding pelletization obtains the PBT resin composition for mixed, reaction；Each section of reaction temperature is 210~240 DEG C, screw speed 300 ~400 revs/min.
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 refrigerant heat-resisting quantity It can be 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 refrigerant PBT resin composition, which is characterized in that the material including following parts by weight:
2. refrigerant PBT resin composition according to claim 1, which is characterized in that the filler include 30~ 40wt% expanded vermiculite and 60~70wt% fluorographite.
3. refrigerant PBT resin composition according to claim 1, which is characterized in that the compatilizer include 60~ 70wt% maleic anhydride grafted polystyrene and 30~40wt%SEBS.
4. refrigerant PBT resin composition according to claim 1, which is characterized in that the antioxidant include 20~ 30wt% copper dialkyldithiocarbamate and 70~80wt% copper dialkyldithiocarbamate.
5. refrigerant PBT resin composition according to claim 1, which is characterized in that the lubricant include 60~ 70wt% molybdenum disulfide and 30~40wt% sulfurized olefin cotton oil.
6. refrigerant PBT resin composition according to claim 1, which is characterized in that further include the complete of 3~5 parts by weight Perfluoroalkyl polyether oil.
7. refrigerant PBT resin composition according to claim 1, which is characterized in that further include the mistake of 1~3 parts by weight Water Span.
8. refrigerant PBT resin composition according to claim 1, which is characterized in that further include the 2- of 1~3 parts by weight Thionaphthol.
9. refrigerant PBT resin composition according to claim 2, which is characterized in that the expanded vermiculite and fluorination stone The specific surface area of ink is 500~700m2/g。
10. the preparation method of described in any item refrigerant PBT resin compositions according to claim 1~9, which is characterized in that The preparation method includes the following steps:
1) polybutylene terephthalate (PBT), expanded vermiculite, fluorographite are stirred to obtain the first mixture；
2) the first mixture, tetrafluoro-hexafluoroethylene copolymer fiber, organosilicon modified crylic acid resin, maleic anhydride are connect Branch polystyrene, SEBS, copper dialkyldithiocarbamate, copper dialkyldithiocarbamate, molybdenum disulfide, vulcanization alkene Hydrocarbon cottonseed oil, perfluoro polyether oil, sorbitan fatty acid ester and 2- thionaphthol are uniformly mixed, and mixture passes through twin-screw extrusion Machine is blended, reaction and extruding pelletization obtain the PBT resin composition；Each section of reaction temperature is 210~240 DEG C, screw speed It is 300~400 revs/min.
CN201910378082.6A 2019-05-08 2019-05-08 A kind of refrigerant PBT resin composition and preparation method thereof Pending CN110172231A (en)

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Application publication date: 20190827