CN113637268A - Composition with good dielectric property and suitable for electrical field and preparation method thereof - Google Patents
Composition with good dielectric property and suitable for electrical field and preparation method thereof Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 54
- 230000005684 electric field Effects 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title description 6
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 73
- 239000004816 latex Substances 0.000 claims abstract description 52
- 229920000126 latex Polymers 0.000 claims abstract description 52
- 239000008367 deionised water Substances 0.000 claims abstract description 50
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 40
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000003999 initiator Substances 0.000 claims abstract description 37
- 239000007864 aqueous solution Substances 0.000 claims abstract description 35
- 229920001971 elastomer Polymers 0.000 claims abstract description 34
- 229920000578 graft copolymer Polymers 0.000 claims abstract description 34
- 229940126062 Compound A Drugs 0.000 claims abstract description 31
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 26
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000005406 washing Methods 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 19
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000001112 coagulating effect Effects 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 17
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 17
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 60
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 42
- 238000003756 stirring Methods 0.000 claims description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 18
- 238000009210 therapy by ultrasound Methods 0.000 claims description 14
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000009775 high-speed stirring Methods 0.000 claims description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 7
- QSNSCYSYFYORTR-UHFFFAOYSA-N 4-chloroaniline Chemical compound NC1=CC=C(Cl)C=C1 QSNSCYSYFYORTR-UHFFFAOYSA-N 0.000 claims description 6
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 5
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 5
- 239000000344 soap Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- BMDVPRGEZHHGLJ-UHFFFAOYSA-N [S](Cl)(Cl)Cl.[P] Chemical compound [S](Cl)(Cl)Cl.[P] BMDVPRGEZHHGLJ-UHFFFAOYSA-N 0.000 claims description 4
- SLUNEGLMXGHOLY-UHFFFAOYSA-N benzene;hexane Chemical compound CCCCCC.C1=CC=CC=C1 SLUNEGLMXGHOLY-UHFFFAOYSA-N 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 150000002391 heterocyclic compounds Chemical class 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000011574 phosphorus Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- ILWRPSCZWQJDMK-UHFFFAOYSA-N triethylazanium;chloride Chemical compound Cl.CCN(CC)CC ILWRPSCZWQJDMK-UHFFFAOYSA-N 0.000 claims description 4
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 4
- -1 (2, 4-di-tert-butyl) phenyl Chemical group 0.000 claims description 3
- 239000007983 Tris buffer Substances 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical group [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 2
- LWEAHXKXKDCSIE-UHFFFAOYSA-M 2,3-di(propan-2-yl)naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S([O-])(=O)=O)=C(C(C)C)C(C(C)C)=CC2=C1 LWEAHXKXKDCSIE-UHFFFAOYSA-M 0.000 claims description 2
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 claims description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 2
- 125000002877 alkyl aryl group Chemical group 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000002490 anilino group Chemical group [H]N(*)C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 claims description 2
- 238000004821 distillation Methods 0.000 claims description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 238000001132 ultrasonic dispersion Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 6
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 5
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000008096 xylene Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 2
- FNGLQNMQHOAIJQ-UHFFFAOYSA-N Cl[S](Cl)Cl Chemical compound Cl[S](Cl)Cl FNGLQNMQHOAIJQ-UHFFFAOYSA-N 0.000 description 2
- 229920002594 Polyethylene Glycol 8000 Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- WQYSXVGEZYESBR-UHFFFAOYSA-N thiophosphoryl chloride Chemical group ClP(Cl)(Cl)=S WQYSXVGEZYESBR-UHFFFAOYSA-N 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 229960000583 acetic acid Drugs 0.000 description 1
- 229920001893 acrylonitrile styrene Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000003574 free electron Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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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
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
- C08F279/04—Vinyl aromatic monomers and nitriles as the only monomers
-
- 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 & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Graft Or Block Polymers (AREA)
Abstract
The invention discloses a composition with good dielectric property, which is suitable for the electrical field and is prepared by the following method: 1) putting butadiene, acrylonitrile, an initiator, a first emulsifier and deionized water into a reaction kettle, and polymerizing to obtain butyronitrile latex; 2) adding the compound A, and performing ultrasonic dispersion; 3) preparing a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min; 4) raising the reaction temperature to 70 ℃, adding a styrene monomer, an acrylonitrile monomer, deionized water and a first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain a rubber graft copolymer; 5) the SAN resin, the antioxidant and the rubber graft copolymer are blended and extruded to obtain the composition. The composition prepared by the invention has good dielectric property and good comprehensive performance, and is suitable for being applied to the field of electricity.
Description
Technical Field
The invention belongs to the field of polymers, and particularly relates to a composition with good dielectric property and suitable for the electric field and a preparation method thereof.
Background
The ABS resin is an Acrylonitrile-Butadiene-Styrene copolymer, and the ABS is an acronym of Acrylonitrile Butadiene Styrene, and is a thermoplastic high polymer material which has high strength, good toughness and easy processing and molding.
Common ABS plastics are commonly used in electrical equipment, electrical equipment and other equipment due to excellent mechanical properties, and the requirement on the insulating property of the materials is higher. The dielectric strength is generally used for evaluating the insulation performance of plastics, and because the dielectric strength of common plastics is slightly lower, some free electrons always exist in ABS plastics, and are accelerated under the action of an external electric field to impact neutral atoms, so that the atoms are ionized, and finally, the material is broken down. The main phenomena of plastic breakdown include insulation performance damage, generation of main electric arc at a breakdown point, melting, zooming, burning of a material perforation and the like.
In the prior art, the dielectric strength is generally improved by blending some additives in the ABS resin. Generally, the higher the dielectric strength, the better the insulation quality of the material.
Due to the change of temperature and environment, ABS plastic can change, the mechanical property and the dielectric strength of the ABS plastic also change, and particularly, the dielectric strength of the ABS plastic can be reduced under the environment of long-term high temperature, humidity, dirt and oxidation, so that the ABS plastic cannot meet the use requirement, and the service life is shortened.
Disclosure of Invention
The invention aims to provide a composition with good dielectric property, which is suitable for the electrical field, has good dielectric property and good comprehensive property, and is suitable for the electrical field.
Further, the present invention is necessary to provide a method for preparing the composition having good dielectric properties suitable for the electrical field.
A composition with good dielectric property suitable for the electric field is ABS resin,
the ABS is obtained by butadiene, acrylonitrile and styrene through a solution polymerization method, and a phosphorus-containing heterocyclic compound is added to serve as a molecular weight regulator.
The composition with good dielectric property suitable for the electric field is prepared by the following method:
1) putting butadiene, acrylonitrile, an initiator, a first emulsifier and deionized water into a reaction kettle, and polymerizing for 8-10 hours at the temperature of 65-80 ℃ to obtain butyronitrile latex;
2) adding a phosphorus-containing heterocyclic compound, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
3) dissolving a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min;
4) raising the reaction temperature to 70 ℃, adding a styrene monomer, an acrylonitrile monomer, deionized water and a first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain a rubber graft copolymer;
5) the SAN resin, the antioxidant and the rubber graft copolymer are mixed and dispersed uniformly, and then the composition is obtained through blending and extrusion.
A composition with good dielectric property suitable for the electrical field is prepared by the following steps:
1) putting butadiene, acrylonitrile, an initiator, a first emulsifier and deionized water into a reaction kettle, and polymerizing for 8-10 hours at the temperature of 65-80 ℃ to obtain butyronitrile latex;
2) adding the compound A, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
compound a has the following structural formula:
r1 is hydrogen, Cl or C1-C6 alkyl, R2 is substituted anilino;
3) dissolving a second emulsifier in 30 parts of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min;
4) raising the reaction temperature to 70 ℃, adding a styrene monomer, an acrylonitrile monomer, deionized water and a first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain a rubber graft copolymer;
5) the SAN resin, the antioxidant and the rubber graft copolymer are mixed and dispersed uniformly, and then the composition is obtained through blending and extrusion.
The composition with good dielectric property suitable for the electric field is prepared by the following method:
1) putting 50-60 parts by weight of butadiene, 20-30 parts by weight of acrylonitrile, 0.1-0.5 part by weight of initiator, 2-5 parts by weight of first emulsifier and 100-150 parts by weight of deionized water into a reaction kettle, and polymerizing for 8-10 hours at the temperature of 65-80 ℃ to obtain the butyronitrile latex;
2) adding the compound A, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
compound a has the following structural formula:
3) dissolving 0.5-0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min;
4) raising the reaction temperature to 70 ℃, adding 30-40 parts by weight of styrene monomer, 20-25 parts by weight of acrylonitrile monomer, 80-100 parts by weight of deionized water and 0.2-0.5 part by weight of first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 75-85 parts of SAN resin, 1-2 parts of antioxidant and 20-30 parts of rubber graft copolymer are uniformly mixed and dispersed, and then blended and extruded to obtain the composition.
Further, the composition with good dielectric properties suitable for the electrical field is preferably prepared by the following method:
1) introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 50-60 parts by weight of butadiene, 20-30 parts by weight of acrylonitrile, 0.1-0.5 part by weight of initiator, 2-5 parts by weight of first emulsifier and 100-150 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing at 65-80 ℃ for 8-10 hours to obtain latex 1;
2) under the condition of high-speed stirring, adding 5-8 parts by weight of compound A into the latex 1, finishing adding the compound A for 30min, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
3) dissolving 0.5-0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1-1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to obtain latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 32-38 parts by weight of styrene monomer, 20-25 parts by weight of acrylonitrile monomer, 80-100 parts by weight of deionized water and 0.2-0.5 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain rubber graft copolymer powder;
5) 80 parts by weight of SAN resin, 1-2 parts by weight of antioxidant and 25-28 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and are melted and blended in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Wherein the compound A is prepared by the following method:
1) adding catechol and dimethylbenzene into a container, dripping trichloro-thiophosphoryl and triethylamine from two constant-pressure funnels under the condition of uniform stirring, refluxing after stirring at room temperature, filtering to remove off-white solid, washing for four times by using benzene, extracting solvent, carrying out reduced pressure distillation to collect 102 ℃ fraction to obtain the trichloro-thiophosphoryl and triethylamine
2) Dissolving the compound shown in the formula (V) in benzene to obtain a benzene solution containing the compound (V), dropwise adding the benzene solution containing the compound (V) into a mixed solution consisting of p-chloroaniline, triethylamine and benzene, reacting for 3 hours, filtering generated triethylamine hydrochloride, removing the solution by suction filtration to obtain yellow thick liquid, standing for solidification, and recrystallizing with benzene-hexane to obtain the compound A shown in the formula (II).
The process for preparing compound a may be:
1) adding 0.05mol parts of catechol and xylene into a container, wherein the ratio of the catechol to the xylene is 1 mol: 1L, simultaneously dripping 0.05mol part of trichloro sulfur phosphorus and 0.1mol part of triethylamine from two constant pressure funnels under the condition of uniform stirring, stirring for 1h at room temperature, refluxing for 2h, filtering to remove off-white solid, washing for four times by using benzene, extracting solvent, distilling under reduced pressure and collecting 102 ℃ fraction to obtain the trichloro sulfur and triethylamine
2) Dissolving 0.026mol portion of (V) in benzene to obtain a mixed solution a, wherein the ratio of (V) to benzene is 1.3 mol: 1L; dissolving parachloroaniline and triethylamine in benzene to obtain a mixed solution b, wherein the proportion of the parachloroaniline, the triethylamine and the benzene is 1.3 mol: 1.3 mol: 1L; dropwise adding the mixed solution a into the mixed solution b at the temperature of 20 ℃, reacting for 3h, filtering triethylamine hydrochloride, filtering to remove the solvent by suction filtration to obtain yellow thick liquid, standing for solidification, and recrystallizing with benzene-hexane to obtain the substance shown in A (II).
In the process of preparing the composition, the compound A is added in the step 2), and the compound A is uniformly dispersed in a latex 1 (butyronitrile latex) system, so that the molecular weight distribution and uniformity of the latex 2 can be adjusted in the polymerization reaction in the step 3), and the comprehensive performance of the composition is finally influenced.
Wherein the initiator is selected from potassium persulfate or cumene hydroperoxide.
Wherein, the first emulsifier is selected from one or more of sodium dodecyl sulfate, nekal, rosin soap, alkyl sodium sulfonate, alkyl aryl sodium sulfonate and polyethylene glycol.
Wherein the second emulsifier is rosin soap or/and polyethylene glycol.
Wherein the antioxidant is tris (2, 4-di-tert-butyl) phenyl phosphite, triphenyl phosphite or tributyl sulfite.
Wherein the SAN resin is acrylonitrile-styrene copolymer and is prepared from acrylonitrile and styrene by a bulk method, a suspension method or an emulsion method.
The preparation method of the composition with good dielectric property, which is suitable for the electric field, comprises the following steps:
1) introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 50-60 parts by weight of butadiene, 20-30 parts by weight of acrylonitrile, 0.1-0.5 part by weight of initiator, 2-5 parts by weight of first emulsifier and 100-150 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing at 65-80 ℃ for 8-10 hours to obtain latex 1;
2) under the condition of high-speed stirring, adding 5-8 parts by weight of compound A into the latex 1, finishing adding the compound A for 30min, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
3) dissolving 0.5-0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1-1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to obtain latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 32-38 parts by weight of styrene monomer, 20-25 parts by weight of acrylonitrile monomer, 80-100 parts by weight of deionized water and 0.2-0.5 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain rubber graft copolymer powder;
5) 80 parts by weight of SAN resin, 1-2 parts by weight of antioxidant and 25-28 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and are melted and blended in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Compared with the prior art, the ABS resin obtained by the compound A, the composition and the preparation method thereof provided by the invention has good dielectric properties in different temperature and humidity environments, and the dielectric properties can still be kept at a higher level after corrosion and aging, so that the composition (ABS resin) obtained by the invention can be better applied to the electrical field.
Drawings
FIG. 1 is a graph comparing the dielectric properties of comparative example compositions of the examples.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the technical field better understand the scheme of the present invention.
The raw materials used in the embodiment are as follows:
acrylonitrile: zi Bo Xin Rong chemical technology Co., Ltd;
styrene: zi Bo Xin Rong chemical technology Co., Ltd;
butadiene: chengdu Hongjin chemical industry, Limited liability company;
initiator: potassium persulfate, commercially available from sources;
a first emulsifier: sodium dodecyl aryl sulfonate and polyethylene glycol were mixed in a ratio of 1: 1 weight ratio, wherein the polyethylene glycol is PEG-8000;
a second emulsifier: rosin soap and polyethylene glycol were mixed at a ratio of 1: 1 weight ratio, wherein the polyethylene glycol is PEG-8000;
antioxidant: tris (2, 4-di-tert-butyl) phenyl phosphite;
SAN resin: ningbo Taiwan, brand NF 2200;
preparation of compound a:
1) adding 0.05mol parts of catechol and xylene into a container, wherein the proportion of the catechol to the xylene is 1 mol: 1L, simultaneously dripping 0.05mol part of trichloro sulfur phosphorus and 0.1mol part of triethylamine from two constant pressure funnels under the condition of uniform stirring, stirring for 1h at room temperature, refluxing for 2h, filtering to remove off-white solid, washing for four times by using benzene, extracting solvent, distilling under reduced pressure and collecting 102 ℃ fraction to obtain the trichloro sulfur and triethylamine
2) Dissolving 0.026mol portion of (V) in benzene to obtain a mixed solution a, wherein the ratio of (V) to benzene is 1.3 mol: 1L; dissolving parachloroaniline and triethylamine in benzene to obtain a mixed solution b, wherein the proportion of the parachloroaniline, the triethylamine and the benzene is 1.3 mol: 1.3 mol: 1L; and (3) dropwise adding the mixed solution a into the mixed solution b at the temperature of 20 ℃, reacting for 3 hours, filtering triethylamine hydrochloride, performing suction filtration to remove the solvent to obtain yellow thick liquid, standing for solidification, and recrystallizing with benzene-hexane to obtain the compound A shown in the formula (II).
The rest of the raw materials are from commercial sources.
Example 1
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 50 parts by weight of butadiene, 30 parts by weight of acrylonitrile, 0.1 part by weight of initiator, 5 parts by weight of first emulsifier and 150 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 8 hours at 80 ℃ to obtain latex 1;
2) under the condition of high-speed stirring, adding 5 parts by weight of a compound A into the latex 1, and after the compound A is added for 30min, carrying out ultrasonic treatment for 2-3 hours at the temperature of 30 ℃;
3) dissolving 0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to prepare latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 38 parts by weight of styrene monomer, 25 parts by weight of acrylonitrile monomer, 80 parts by weight of deionized water and 0.5 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 80 parts by weight of SAN resin, 1 part by weight of antioxidant and 28 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Example 2
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 60 parts by weight of butadiene, 20 parts by weight of acrylonitrile, 0.5 part by weight of initiator, 2 parts by weight of first emulsifier and 100 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 10 hours at 65 ℃ to obtain latex 1;
2) under the condition of high-speed stirring, adding 8 parts by weight of compound A into the latex 1, and after the compound A is added for 30min, carrying out ultrasonic treatment for 2-3 hours at the temperature of 40 ℃;
3) dissolving 0.5 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1 hour under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to prepare latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 32 parts by weight of styrene monomer, 20 parts by weight of acrylonitrile monomer, 100 parts by weight of deionized water and 0.2 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 80 parts by weight of SAN resin, 2 parts by weight of antioxidant and 25 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Example 3
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 55 parts by weight of butadiene, 25 parts by weight of acrylonitrile, 0.3 part by weight of initiator, 4 parts by weight of first emulsifier and 130 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 8-10 hours at 70 ℃ to obtain latex 1;
2) under the condition of high-speed stirring, adding 7 parts by weight of compound A into the latex 1, and after the compound A is added for 30min, carrying out ultrasonic treatment for 2.5 hours at 35 ℃;
3) dissolving 0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to prepare latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 35 parts by weight of styrene monomer, 23 parts by weight of acrylonitrile monomer, 90 parts by weight of deionized water and 0.4 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 80 parts by weight of SAN resin, 1.5 parts by weight of antioxidant and 27 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Example 4
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 55 parts by weight of butadiene, 25 parts by weight of acrylonitrile, 0.3 part by weight of initiator, 4 parts by weight of first emulsifier and 130 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 8-10 hours at 70 ℃ to obtain latex 1;
2) under the condition of high-speed stirring, 3 parts by weight of compound A are added into the latex 1, and after the compound A is added for 30min, ultrasonic treatment is carried out for 2.5 hours at the temperature of 35 ℃;
3) dissolving 0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to prepare latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 35 parts by weight of styrene monomer, 23 parts by weight of acrylonitrile monomer, 90 parts by weight of deionized water and 0.4 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 80 parts by weight of SAN resin, 1.5 parts by weight of antioxidant and 27 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Example 5
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 55 parts by weight of butadiene, 25 parts by weight of acrylonitrile, 0.3 part by weight of initiator, 4 parts by weight of first emulsifier and 130 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 8-10 hours at 70 ℃ to obtain latex 1;
2) under the condition of high-speed stirring, 10 parts by weight of compound A is added into the latex 1, and after the compound A is added for 30min, ultrasonic treatment is carried out for 2.5 hours at the temperature of 35 ℃;
3) dissolving 0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to prepare latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 35 parts by weight of styrene monomer, 23 parts by weight of acrylonitrile monomer, 90 parts by weight of deionized water and 0.4 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 80 parts by weight of SAN resin, 1.5 parts by weight of antioxidant and 27 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
Example 6
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 55 parts by weight of butadiene, 25 parts by weight of acrylonitrile, 0.3 part by weight of initiator, 4 parts by weight of first emulsifier and 130 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 8-10 hours at 70 ℃ to obtain latex 1;
2) adding 7 parts by weight of compound A into the latex 1 within 1min under the condition of high-speed stirring;
3) dissolving 0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to prepare latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 35 parts by weight of styrene monomer, 23 parts by weight of acrylonitrile monomer, 90 parts by weight of deionized water and 0.4 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 80 parts by weight of SAN resin, 1.5 parts by weight of antioxidant and 27 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200 ℃ and 210 ℃ to obtain the composition.
Comparative example 1
1) Introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 55 parts by weight of butadiene, 25 parts by weight of acrylonitrile, 0.3 part by weight of an initiator, 4 parts by weight of a first emulsifier and 130 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing for 8-10 hours at 70 ℃ to obtain latex 1;
2) dissolving 0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the latex 1 within 1.5h under the stirring condition of 20r/min, setting the temperature of a reaction system at 30 ℃, and reacting for 30min to prepare latex 2;
3) raising the temperature of the latex 2 to 70 ℃, adding 35 parts by weight of styrene monomer, 23 parts by weight of acrylonitrile monomer, 90 parts by weight of deionized water and 0.4 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
4) 80 parts by weight of SAN resin, 1.5 parts by weight of antioxidant and 27 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and melt blending is carried out in a double-screw extruder at the temperature of 200 ℃ and 210 ℃ to obtain the composition.
The dielectric property test method comprises the following steps:
samples were prepared according to the method of GB1408-89, and different samples were tested for voltage endurance under ambient condition 1 (temperature 23 + -2, relative temperature 25 + -5%), ambient condition 2 (temperature 45 + -2, relative temperature 50 + -5%) and ambient condition 3 (temperature 60 + -2, relative temperature 70 + -5%), and the electrical strength values P1, P2 and P3 measured respectively are shown in Table 1.
Samples prepared according to the method of GB1408-89 are treated by a salt spray corrosion test box, the temperature of the test is changed cyclically between minus 20 ℃ and 100 ℃, the temperature change speed is 10 ℃/10min, and the mist reduction amount is 0.5mL/80cm h, and the pressure of a nozzle is 100 kPa. An aqueous solution containing 5% sodium chloride and 5% glacial acetic acid was sprayed by a spraying device, samples were taken out for 10 days to perform a withstand voltage test, different samples were taken to test withstand voltage performance under environmental conditions 1 (temperature 23 + -2, relative temperature 25 + -5%), environmental conditions 2 (temperature 45 + -2, relative temperature 50 + -5%) and environmental conditions 3 (temperature 60 + -2, relative temperature 70 + -5%), and electrical strength values P4, P5 and P6 measured respectively were listed in table 1.
TABLE 1 results of dielectric Properties test (electric Strength: MV/m)
| P1 | P2 | P3 | P4 | P5 | P6 | |
| Example 1 | 60.35 | 54.27 | 43.42 | 48.24 | 43.42 | 36.54 |
| Example 2 | 61.80 | 55.62 | 44.50 | 49.44 | 44.50 | 35.60 |
| Example 3 | 62.52 | 56.25 | 48.64 | 50.00 | 45.00 | 42.35 |
| Example 4 | 55.33 | 44.24 | 35.39 | 44.24 | 35.39 | 28.31 |
| Example 5 | 52.98 | 42.32 | 33.86 | 42.32 | 33.86 | 27.08 |
| Example 6 | 50.01 | 40.08 | 32.06 | 40.08 | 32.06 | 25.65 |
| Comparative example 1 | 38.40 | 26.88 | 21.50 | 30.72 | 21.50 | 17.20 |
As shown in FIG. 1, it can be seen more intuitively that the dielectric properties of examples 1-3 are better under different temperature and humidity conditions, and particularly, the dielectric properties are significantly better than those of examples 4-6 and comparative example 1 under high temperature and high humidity environment.
After the samples are subjected to salt spray corrosion and alternate cold and hot aging simulation experiments, the dielectric properties of the samples of examples 1-3 still maintain a good level under different temperature and humidity environments as can be seen from the values of P4, P5 and P6.
Therefore, the composition is actually an ABS composition, and the compound A is added in the production process of the latex 2 to adjust the molecular weight and the distribution state of the latex 2, so that the dielectric property of the composition can be well improved when the composition is blended with SAN and extruded. The composition can be directly applied to electrical products, can be used for further preparing required engineering plastics according to actual requirements, and is applied to special fields.
Mechanical Property test
The compositions obtained in examples 1 to 6 and comparative example 1 were subjected to the following mechanical tests, and the test results are shown in Table 2.
The tensile strength is tested according to the GB/T1040-2006 standard, the tensile speed is 5mm/s, and the test temperature is 23 ℃.
The notch impact strength is tested according to the GB/T1843-2008 standard; sample size (mm): (80. + -.2) × (10. + -. 0.2) × (4. + -. 0.2), the radius of the bottom of the notch (mm) is 0.25. + -. 0.05, the notch retention thickness (mm) is 8.0. + -. 0.2, the test temperature is 23 ℃.
TABLE 2 mechanical Property test results
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 | |
| Tensile strength MPa | 42.5 | 43.4 | 43.5 | 42.1 | 42.9 | 42.8 | 42.0 |
| Notched impact strength MPa | 6.2 | 6.5 | 6.5 | 6.4 | 6.2 | 6.3 | 6.2 |
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A composition with good dielectric property suitable for the electrical field is ABS resin, and is characterized in that:
the ABS is obtained by butadiene, acrylonitrile and styrene through a solution polymerization method, and a phosphorus-containing heterocyclic compound is added to serve as a molecular weight regulator.
2. The composition with good dielectric properties for use in electrical applications as claimed in claim 1, wherein the composition is prepared by the following method:
1) putting butadiene, acrylonitrile, an initiator, a first emulsifier and deionized water into a reaction kettle, and polymerizing for 8-10 hours at the temperature of 65-80 ℃ to obtain butyronitrile latex;
2) adding a phosphorus-containing heterocyclic compound, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
3) dissolving a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min;
4) raising the reaction temperature to 70 ℃, adding a styrene monomer, an acrylonitrile monomer, deionized water and a first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain a rubber graft copolymer;
5) the SAN resin, the antioxidant and the rubber graft copolymer are mixed and dispersed uniformly, and then the composition is obtained through blending and extrusion.
3. The composition with good dielectric properties for use in electrical applications as claimed in claim 2, wherein the composition is prepared by the following method:
1) putting butadiene, acrylonitrile, an initiator, a first emulsifier and deionized water into a reaction kettle, and polymerizing for 8-10 hours at the temperature of 65-80 ℃ to obtain butyronitrile latex;
2) adding the compound A, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
compound a has the following structural formula:
r1 is hydrogen, Cl or C1-C6 alkyl, R2 is substituted anilino;
3) dissolving a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min;
4) raising the reaction temperature to 70 ℃, adding a styrene monomer, an acrylonitrile monomer, deionized water and a first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain a rubber graft copolymer;
5) the SAN resin, the antioxidant and the rubber graft copolymer are mixed and dispersed uniformly, and then the composition is obtained through blending and extrusion.
4. The composition with good dielectric properties for use in electrical applications as claimed in claim 3, wherein the composition is prepared by the following method:
1) putting 50-60 parts by weight of butadiene, 20-30 parts by weight of acrylonitrile, 0.1-0.5 part by weight of initiator, 2-5 parts by weight of first emulsifier and 100-150 parts by weight of deionized water into a reaction kettle, and polymerizing for 8-10 hours at the temperature of 65-80 ℃ to obtain the butyronitrile latex;
2) adding the compound A, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
compound a has the following structural formula:
3) dissolving 0.5-0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, adding the second emulsifier aqueous solution into the reaction system in the step 2), and reacting for 30 min;
4) raising the reaction temperature to 70 ℃, adding 30-40 parts by weight of styrene monomer, 20-25 parts by weight of acrylonitrile monomer, 80-100 parts by weight of deionized water and 0.2-0.5 part by weight of first initiator, reacting for 2 hours, filtering, coagulating, washing and drying to obtain the rubber graft copolymer;
5) 75-85 parts of SAN resin, 1-2 parts of antioxidant and 20-30 parts of rubber graft copolymer are uniformly mixed and dispersed, and then blended and extruded to obtain the composition.
5. The composition of claim 4 having good dielectric properties suitable for use in the electrical field, wherein:
the compound A is prepared by the following method:
1) adding catechol and dimethylbenzene into a container, dripping trichloro-sulfur phosphorus and triethylamine from two constant-pressure funnels simultaneously while stirring, refluxing after stirring at room temperature, filtering to remove off-white solid, washing for four times by using benzene, extracting solvent, carrying out reduced pressure distillation to collect 102 ℃ fraction to obtain the trichloro-sulfur phosphorus and triethylamine
2) Dissolving the compound shown in the formula (V) in benzene to obtain a benzene solution containing the compound (V), dropwise adding the benzene solution containing the compound (V) into a mixed solution consisting of p-chloroaniline, triethylamine and benzene, reacting for 3h, filtering generated triethylamine hydrochloride, removing the solvent by suction filtration to obtain yellow thick liquid, standing for solidification, and recrystallizing with benzene-hexane to obtain the compound A shown in the formula (II).
6. The composition with good dielectric properties suitable for use in the electrical field according to claim 4, wherein:
the initiator is selected from potassium persulfate or cumene hydroperoxide.
7. The composition with good dielectric properties suitable for use in the electrical field according to claim 4, wherein:
the first emulsifier is selected from one or more of sodium dodecyl sulfate, nekal, rosin soap, alkyl sodium sulfonate, alkyl aryl sodium sulfonate and polyethylene glycol.
8. The composition with good dielectric properties suitable for use in the electrical field according to claim 4, wherein:
the second emulsifier is rosin soap or/and polyethylene glycol.
9. The composition with good dielectric properties suitable for use in the electrical field according to claim 4, wherein:
the antioxidant is tris (2, 4-di-tert-butyl) phenyl phosphite, triphenyl phosphite or tributyl sulfite.
10. A method for preparing a dielectric composition according to any one of claims 1 to 9 for use in the electrical field, comprising the steps of:
1) introducing nitrogen into a high-pressure reactor provided with a stirrer and a condensing device for protection, keeping the temperature at 60 ℃, adding 50-60 parts by weight of butadiene, 20-30 parts by weight of acrylonitrile, 0.1-0.5 part by weight of initiator, 2-5 parts by weight of first emulsifier and 100-150 parts by weight of deionized water into the reactor, uniformly stirring, and polymerizing at 65-80 ℃ for 8-10 hours to obtain latex 1;
2) under the condition of high-speed stirring, adding 5-8 parts by weight of compound A into the latex 1, finishing adding the compound A for 30min, and then carrying out ultrasonic treatment for 2-3 hours at the temperature of 30-40 ℃;
3) dissolving 0.5-0.8 part by weight of a second emulsifier in 30 parts by weight of deionized water to prepare a second emulsifier aqueous solution, and adding the second emulsifier aqueous solution into the reaction system in the step 2) within 1-1.5h under the stirring condition of 20r/min, wherein the temperature of the reaction system is set to be 30 ℃, and reacting for 30min to obtain latex 2;
4) raising the temperature of the latex 2 to 70 ℃, adding 32-38 parts by weight of styrene monomer, 20-25 parts by weight of acrylonitrile monomer, 80-100 parts by weight of deionized water and 0.2-0.5 part by weight of first initiator, and reacting for 2 hours; filtering, coagulating, washing and drying to obtain rubber graft copolymer powder;
5) 80 parts by weight of SAN resin, 1-2 parts by weight of antioxidant and 25-28 parts by weight of rubber graft copolymer are fully mixed to be uniformly dispersed, and are melted and blended in a double-screw extruder at the temperature of 200-210 ℃ to obtain the composition.
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