CN114773820A - PC/ABS copolymer and preparation method thereof - Google Patents
PC/ABS copolymer and preparation method thereof Download PDFInfo
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- CN114773820A CN114773820A CN202210337262.1A CN202210337262A CN114773820A CN 114773820 A CN114773820 A CN 114773820A CN 202210337262 A CN202210337262 A CN 202210337262A CN 114773820 A CN114773820 A CN 114773820A
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- 229920007019 PC/ABS Polymers 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims abstract description 29
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims description 30
- 229920001577 copolymer Polymers 0.000 claims description 29
- 230000002265 prevention Effects 0.000 claims description 23
- 239000000654 additive Substances 0.000 claims description 20
- 230000000996 additive effect Effects 0.000 claims description 20
- 229920001971 elastomer Polymers 0.000 claims description 18
- 239000005060 rubber Substances 0.000 claims description 18
- 239000003963 antioxidant agent Substances 0.000 claims description 16
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical group O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 15
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 230000003078 antioxidant effect Effects 0.000 claims description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- -1 whisker Substances 0.000 claims description 5
- 229920000147 Styrene maleic anhydride Polymers 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 229920006163 vinyl copolymer Polymers 0.000 claims description 4
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- ODJQKYXPKWQWNK-UHFFFAOYSA-L 3-(2-carboxylatoethylsulfanyl)propanoate Chemical compound [O-]C(=O)CCSCCC([O-])=O ODJQKYXPKWQWNK-UHFFFAOYSA-L 0.000 claims description 2
- YAAQEISEHDUIFO-UHFFFAOYSA-N C=CC#N.OC(=O)C=CC=CC1=CC=CC=C1 Chemical compound C=CC#N.OC(=O)C=CC=CC1=CC=CC=C1 YAAQEISEHDUIFO-UHFFFAOYSA-N 0.000 claims description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 2
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920002877 acrylic styrene acrylonitrile Polymers 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- PLOYJEGLPVCRAJ-UHFFFAOYSA-N buta-1,3-diene;prop-2-enoic acid;styrene Chemical compound C=CC=C.OC(=O)C=C.C=CC1=CC=CC=C1 PLOYJEGLPVCRAJ-UHFFFAOYSA-N 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 2
- OXUXEYPUQOBPCX-UHFFFAOYSA-N ethene;prop-1-ene;prop-2-enenitrile;styrene Chemical group C=C.CC=C.C=CC#N.C=CC1=CC=CC=C1 OXUXEYPUQOBPCX-UHFFFAOYSA-N 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 235000019359 magnesium stearate Nutrition 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 2
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 2
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000049 pigment Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 235000012222 talc Nutrition 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 150000003573 thiols Chemical class 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 2
- 230000008602 contraction Effects 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 23
- 230000000694 effects Effects 0.000 description 11
- 239000004417 polycarbonate Substances 0.000 description 9
- 239000000155 melt Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000012216 screening Methods 0.000 description 4
- 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 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 101100272412 Arabidopsis thaliana BIA1 gene Proteins 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100388296 Arabidopsis thaliana DTX51 gene Proteins 0.000 description 1
- 235000007763 Castanea pumila Nutrition 0.000 description 1
- 229920002633 Kraton (polymer) Polymers 0.000 description 1
- 241000408782 Lepomis microlophus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920001871 amorphous plastic Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
-
- 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
- C08K2201/005—Additives being defined by their particle size in general
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a PC/ABS copolymer and a preparation method thereof, belonging to the field of high polymer materials. The PC/ABS copolymer can effectively solve the problems of expansion with heat and contraction with cold and abnormal sound easily generated when the traditional PC/ABS material is used for preparing the automobile parts through the material without introducing a lubricant or an isolation part, simplifies the structural design of the parts to a certain extent, and simultaneously can correspondingly reduce the working procedures of adding felts, coating lubricants and the like in the assembling process of the automobile parts, thereby improving the production efficiency. The invention also discloses a preparation method and application of the PC/ABS copolymer.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a PC/ABS copolymer and a preparation method thereof.
Background
In the modern society that the energy conservation and emission reduction problem also receives global attention, the light weight of the automobile is always the topic of continuous attention of the automobile industry. The rapid development of polymer material technology makes it possible to replace steel with plastic. Nowadays, large-sized parts such as automobile bumpers, spoilers and luggage racks are gradually "plasticized", which reduces the weight of the automobile body and can greatly reduce the fuel consumption of the automobile.
Automobile grille, spoiler and roof rack parts are produced more commonly from PC (polycarbonate)/ABS (acrylonitrile butadiene styrene) plastics. Automobile manufacturers find that the long-sized parts made of the amorphous plastic PC/ABS have obvious size change phenomenon in an environment with obvious cold and heat alternation, commonly called thermal expansion and cold contraction. Dimensional changes can lead to problems such as the parts being subject to breakage at the location of the snap fit, the parts having a reduced service life, and "squeaking" between the parts and other equipment parts. The traditional solution of the prior art to the problems is to optimize the structure of a part through design and mold flow analysis, so as to reduce the degree of expansion with heat and contraction with cold of the part; or felt or lubricant may be applied to the location of the clips or rails, which, however, complicates the manufacturing process and increases the manufacturing cost.
Disclosure of Invention
Based on the defects in the prior art, the invention aims to provide the PC/ABS copolymer, the product can effectively solve the problems of expansion with heat and contraction with cold and abnormal sound easily generated when the traditional PC/ABS material is used for preparing the automobile parts through the material without introducing a lubricant or an isolation part, the structural design of the parts is simplified to a certain extent, meanwhile, the working procedures of adding felts, coating lubricants and the like can be correspondingly reduced in the assembling process of the automobile parts, and the production efficiency is improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a PC/ABS copolymer comprises the following components in parts by weight:
30-85 parts of PC resin, 10-70 parts of ABS resin, 1-5 parts of abnormal sound prevention additive, 2-30 parts of filler and 0.5-2 parts of processing additive; the abnormal sound prevention auxiliary agent comprises at least one of a vinyl copolymer and a styrene copolymer.
The inventor finds that after experiments, a certain amount of abnormal sound prevention auxiliary agent is added to be matched with the filler to be dispersed in the PC resin and the ABS resin, so that the damping property of the product can be effectively improved, the vibration amplitude of the product caused by frictional contact is reduced, and the abnormal sound can be effectively reduced; on the other hand, as the abnormal sound prevention additive and the PC/ABS alloy are of mutually heterogeneous structures, the size of the original continuous phase state of the PC/ABS alloy is reduced after mixing, the degree of expansion with heat and contraction with cold (namely the linear expansion coefficient of the product is reduced), and the effects of abnormal sound prevention and low shrinkage are finally achieved.
However, molecular chains in the selected types of the abnormal sound prevention additive are soft, the degree of expansion with heat and contraction with cold is higher than that of PC/ABS alloy, if the content of the abnormal sound prevention additive in the product components is too high, the phenomenon of expansion with heat and contraction with cold of the product is worsened, meanwhile, the dispersity of the abnormal sound prevention additive in the product components is also obviously reduced, and the abnormal sound prevention effect of the product is limited.
Preferably, the vinyl copolymer is at least one of ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, ethylene-maleic anhydride copolymer, ethylene-styrene-maleic anhydride copolymer, ethylene-propylene-maleic anhydride copolymer, and ethylene-octene-maleic anhydride copolymer;
preferably, the styrene-based copolymer is at least one of acrylonitrile-styrene-acrylate copolymer, acrylonitrile-styrene-ethylene propylene rubber copolymer, acrylate-styrene-butadiene copolymer, styrene-ethylene-styrene copolymer, styrene-hydrogenated ethylene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer, styrene-hydrogenated ethylene-styrene-maleic anhydride copolymer;
more preferably, the anti-abnormal noise assistant is a styrene-based copolymer.
Preferably, the melt flow rate of the PC resin under the conditions of 300 ℃ and 1.2kg load according to ISO 1133-2011 is 3-22 g/10 min;
preferably, the melt flow rate of the ABS resin at 220 ℃ under a load of 10kg according to ISO 1133-2011 is 5-40 g/10 min.
Preferably, the rubber particle diameter of the ABS resin is 300-600 nm.
The inventor finds that the rubber particle size of the ABS resin is 300-600nm, the effects of abnormal sound prevention and expansion with heat and contraction with cold are best. When the particle size of the ABS resin rubber is less than 300nm, the rubber size is too small, and the loss capacity to ultrasonic waves is weak, so that the abnormal sound prevention effect is weakened; however, when the particle size of the rubber is larger than 600nm, the rubber is more easily stretched and lengthened in the injection molding process, and the product is more easily shrunk due to the resilience of the rubber when the ambient temperature changes, so that the linear expansion coefficient of the product is increased, and the degree of expansion caused by heat and contraction caused by cold is large.
Preferably, the filler is at least one of talcum powder, mica powder, barium sulfate, wollastonite, glass fiber, whisker, titanium dioxide and calcium carbonate;
more preferably, the filler is talc;
more preferably, the mesh number of the talcum powder is 3000-6000 meshes.
The inventor finds that different types of fillers influence the abnormal sound prevention degree and the expansion and contraction degree of the product, and the linear expansion coefficient of the product prepared by taking the talcum powder as the filler is lower; the mesh number of the talcum powder also has further influence on the product performance, and the using effect of the talcum powder with 3000-6000 meshes is optimal.
Preferably, the weight part of the filler in the PC/ABS copolymer is 5-15 parts.
When the addition amount of the filler is small, the linear expansion coefficient of the product is high, the degree of expansion with heat and contraction with cold is large, the linear expansion coefficient of the product is reduced along with the gradual increase of the content of the filler, but the abnormal sound prevention effect of the product is influenced, and the comprehensive performance of the product is optimal when the addition amount of the filler is 5-15 parts by weight through screening.
More preferably, the PC/ABS copolymer comprises the following components in parts by weight:
40-60 parts of PC resin, 30-50 parts of ABS resin, 1-5 parts of abnormal sound prevention additive, 5-15 parts of filler and 0.5-2 parts of processing additive.
Preferably, the processing aid is at least one of an antioxidant, a lubricant and a toner;
more preferably, the antioxidant comprises at least one of phosphite antioxidants, hindered phenol antioxidants, hindered amine antioxidants, thiodipropionate antioxidants and thiol antioxidants;
more preferably, the lubricant is at least one of zinc stearate, calcium stearate, magnesium stearate, polyethylene wax, EVA wax, oleamide, erucamide, ethylene bis stearamide, silicone lubricant, and pentaerythritol stearate;
more preferably, the toner is at least one of a pigment and a dye.
Another object of the present invention is to provide a method for preparing the PC/ABS copolymer, comprising the steps of:
and uniformly mixing the components according to the proportion, transferring the mixture to a double-screw extruder, and performing blending extrusion granulation to obtain the PC/ABS copolymer.
The preparation method of the PC/ABS copolymer has simple operation steps and can realize industrial scale production.
Preferably, the temperature of the double-screw extruder during blending, extruding and granulating is set to be 200-260 ℃, and the screw rotating speed is set to be 300-1000 rpm.
The invention aims to provide application of the PC/ABS copolymer in preparing automobile parts.
Preferably, the automotive part is a large-sized part.
Because the phenomenon of expansion with heat and contraction with cold of large-size parts of automobiles is very obvious when the linear expansion coefficient is too high, and the problem of noise generated by frictional contact is more serious than that of small-size parts, if the PC/ABS copolymer with abnormal sound prevention and low shrinkage is adopted as a substrate to prepare the parts, the problems can be effectively solved.
The PC/ABS copolymer has the beneficial effects that the PC/ABS copolymer can effectively solve the problems of expansion with heat and contraction with cold and abnormal sound easily generated when the traditional PC/ABS material is used for preparing automobile parts through the material without introducing a lubricant or an isolation part, the structural design of the parts is simplified to a certain extent, meanwhile, the working procedures of adding felts, coating lubricants and the like can be correspondingly reduced in the assembling process of the automobile parts, and the production efficiency is improved. The invention also provides a preparation method and application of the PC/ABS copolymer.
Detailed Description
In order to better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific examples and comparative examples, which are intended to be understood in detail, but not intended to limit the invention. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention. The experimental reagents and instruments designed for implementing the invention are common reagents and instruments unless otherwise specified.
The raw materials used in the examples and comparative examples are as follows:
PC resin: carrying out heavy industry on Mitsubishi, wherein the melt mass flow rate is 22g/10min at 300 ℃ under the load of 1.2 kg;
ABS1 resin: the melt mass flow rate of the Qimei chemical industry at 220 ℃ and under the load of 10kg is 20g/10min, and the particle size of rubber in the Qimei chemical industry is 400 nm;
ABS2 resin: the mass flow rate of melt under the conditions of 220 ℃ and 10kg load of the chinquapin lake petrochemical is 5g/10min, and the particle size of rubber in the melt is 100 nm;
ABS3 resin: the melt mass flow rate of the guocho-georgene-petrochemical rubber is 6g/10min at 220 ℃ under the load of 10kg, and the particle size of the rubber is 800 nm; filler 1: the grain size is 5000 meshes after sieving by using talc powder;
and (3) filling materials 2: mongolian, talcum powder, the mesh number after screening is 3000 meshes;
filler 3: the grain size of the sieved talcum powder is 6000 meshes;
and (4) filler: yirui stone and talcum powder, the mesh number after screening is 1250 meshes;
the mesh number of the filler 5, Yirui stone and talcum powder after being screened is 8000 meshes;
and (3) filling material 6: yirui stone and calcium carbonate, wherein the mesh number after screening is 5000 meshes;
and (3) filler 7: the number of screened meshes of the barium sulfate is 5000 meshes;
abnormal sound prevention additive 1: kraton, 1152, styrene-hydrogenated ethylene-styrene copolymer;
abnormal sound prevention additive 2: exxon, Vitamaxx, ethylene-propylene copolymers;
antioxidant: commercially available hindered phenolic antioxidants;
lubricant: commercially available pentaerythritol stearate.
The raw materials used in the examples and comparative examples were the same commercial species.
Examples 1 to 20
The components of the PC/ABS copolymer and the preparation method thereof are shown in Table 1.
TABLE 1
The preparation method of the PC/ABS copolymer comprises the following steps:
uniformly mixing all the components according to a ratio, transferring the mixture to a double-screw extruder, and carrying out blending extrusion granulation to obtain the PC/ABS copolymer;
the temperature of the double-screw extruder during blending, extruding and granulating is set to be 200-260 ℃, and the rotating speed of the screws is set to be 700 rpm.
Comparative examples 1 to 6
The comparative examples differ from the examples only in the composition and the ratio, as shown in table 2.
TABLE 2
| Parts of components | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| PC resin | 90 | 4 | 50 | 50 | 50 | 50 |
| ABS1 resin | 4 | 90 | 44 | 44 | 44 | 44 |
| Abnormal sound prevention additive 1 | 1 | 1 | 8 | 1 | 1 | |
| Filler 1 | 5 | 5 | 15 | 15 | 35 | |
| Antioxidant agent | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Lubricant agent | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
Effect example 1
The products obtained in the examples and the comparative examples are subjected to performance tests, and the test items and the test methods are as follows:
(1) abnormal sound prevention: the test was performed according to the standard VDA 230-. Recording the RPN value of each product;
the RPN is 1-10 grades in total, and the RPN is 1-3, and the abnormal sound is judged to be prevented; judging the RPN to be 4-6, and judging the RPN to be medium noise; and (4) judging the RPN to be 7-10, and judging the RPN to be high noise.
(2) Coefficient of linear expansion: the test is carried out according to the standard ISO 11359-21999, the test temperature is-40 to 90 ℃, and the unit is 10-5/K；
The higher the linear expansion coefficient of the product is, the more obvious the phenomenon of expansion with heat and contraction with cold is.
The test results are shown in tables 3 and 4.
TABLE 3
TABLE 4
| Performance of | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 |
| RPN | 5 | 6 | 9 | 2 | 5 | 3 |
| Coefficient of linear expansion | 8.6 | 7.6 | 6.0 | 7.4 | 4.0 | 8.5 |
As can be seen from tables 3 and 4, the products of the examples of the present invention have excellent anti-abnormal noise effect (RPN is 1-3 grade), and the linear expansion coefficient is low (less than or equal to 7.5 x 10)-5and/K), the phenomena of expansion with heat and contraction with cold are not obvious. From examples 1-5, it can be seen that the products of each example have good effects of preventing abnormal noise and reducing shrinkage compared with comparative example 6 without the filler; followed byThe content of the filler in the components of the product is increased, the linear expansion coefficient of the product is reduced, the RPN value is kept stable, the comprehensive performance of the product is optimal when the addition amount of the filler is 5-15 parts, the RPN value of the product tends to increase when the addition amount of the filler is further increased, and the RPN value of the product reaches more than 3 grades when the addition amount of the filler reaches 35 parts as in comparative example 5, so that the abnormal sound prevention standard cannot be reached. It is known from examples 4, 6 and 7 that the anti-abnormal-sound effect of the products of the examples is better than that of the products of comparative example 3 without the anti-abnormal-sound additive, the RPN value of the products is continuously reduced with the increase of the addition amount of the anti-abnormal-sound additive, but the higher the content of the anti-abnormal-sound additive is, the higher the intrinsic linear expansion coefficient of the anti-abnormal-sound additive is, the higher the content of the anti-abnormal-sound additive is, the higher the linear expansion coefficient of the products is, and meanwhile, when the addition amount is more than 5 parts, the dispersibility of the components is deteriorated, the linear expansion coefficient is continuously increased, and the anti-abnormal-sound effect is limited as shown in comparative example 4.
From the comparison between example 2 and example 8, the product prepared by the anti-abnormal-sound assistant is better in performance when the anti-abnormal-sound assistant is a styrene-based copolymer, while from the comparison between example 2 and examples 13 and 14, the product is different in linear expansion coefficient when the filler is different in type, and the product is best when the filler is talcum powder; as can be seen from comparison between example 2 and examples 9-12, when the filler in the product is talc powder, the linear expansion coefficient of the product is further changed due to different mesh numbers, and when the talc powder with 3000-6000 meshes is preferred, the product has the best performance. As can be seen from comparison of examples 2, 17 and 18, when the particle size of the ABS rubber is in the range of 300-600nm, the RPN value is the lowest and the linear expansion coefficient is the lowest. When the rubber particle diameter is less than 300nm, the RPN is larger because the rubber size is too small and the loss power to ultrasonic waves is weak. However, when the rubber particle diameter is larger than 600nm, the rubber is more likely to be elongated during injection molding, and the product is more likely to be shrunk due to the rebound of the rubber when the ambient temperature changes, which results in an increase in the linear expansion coefficient of the product.
As can be seen from comparative examples 1 and 2, improper mixing of the PC resin and the ABS resin also causes a significant reduction in the anti-squealing and shrinkage properties of the product.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The PC/ABS copolymer is characterized by comprising the following components in parts by weight:
30-85 parts of PC resin, 10-70 parts of ABS resin, 1-5 parts of abnormal sound prevention additive, 2-30 parts of filler and 0.5-2 parts of processing additive; the abnormal sound prevention auxiliary agent comprises at least one of a vinyl copolymer and a styrene copolymer.
2. The PC/ABS copolymer of claim 1 wherein the vinyl copolymer is at least one of an ethylene-propylene copolymer, an ethylene-butene copolymer, an ethylene-octene copolymer, an ethylene-maleic anhydride copolymer, an ethylene-styrene-maleic anhydride copolymer, an ethylene-propylene-maleic anhydride copolymer, an ethylene-octene-maleic anhydride copolymer;
the styrene-based copolymer is at least one of acrylonitrile-styrene-acrylate copolymer, acrylonitrile-styrene-ethylene propylene rubber copolymer, acrylate-styrene-butadiene copolymer, styrene-ethylene-styrene copolymer, styrene-hydrogenated ethylene-styrene copolymer, styrene-ethylene-butylene-styrene copolymer and styrene-hydrogenated ethylene-styrene-maleic anhydride copolymer.
3. The PC/ABS copolymer of claim 1 wherein the anti-squeal aid is a styrene-based copolymer.
4. The PC/ABS copolymer according to claim 1, wherein the filler is at least one of talc, mica powder, barium sulfate, wollastonite, glass fiber, whisker, titanium dioxide, and calcium carbonate; preferably, the filler is talcum powder, and the mesh number of the talcum powder is 3000-6000 meshes.
5. The PC/ABS copolymer according to claim 1, wherein the rubber particle diameter of the ABS resin is 300 to 600 nm.
6. The PC/ABS copolymer according to claim 1, wherein the filler is present in the PC/ABS copolymer composition in an amount of 5 to 15 parts by weight.
7. The PC/ABS copolymer according to claim 6,
the PC/ABS copolymer comprises the following components in parts by weight:
40-60 parts of PC resin, 30-50 parts of ABS resin, 1-5 parts of abnormal sound prevention additive, 5-15 parts of filler and 0.5-2 parts of processing additive.
8. The PC/ABS copolymer of claim 1 wherein the processing aid is at least one of an antioxidant, a lubricant, a toner;
preferably, the antioxidant comprises at least one of phosphite antioxidant, hindered phenol antioxidant, hindered amine antioxidant, thiodipropionate antioxidant and thiol antioxidant;
the lubricant is at least one of zinc stearate, calcium stearate, magnesium stearate, polyethylene wax, EVA wax, oleamide, erucamide, ethylene bis stearamide, organosilicon lubricant and pentaerythritol stearate;
the toner is at least one of pigment and dye.
9. The method for preparing the PC/ABS copolymer according to any of claims 1 to 8, comprising the steps of:
uniformly mixing all the components according to the proportion, transferring the mixture to a double-screw extruder, and performing blending extrusion granulation to obtain the PC/ABS copolymer;
preferably, the temperature of the double-screw extruder during blending, extruding and granulating is set to be 200-260 ℃, and the screw rotating speed is set to be 300-1000 rpm.
10. Use of a PC/ABS copolymer according to any of claims 1 to 8 for the production of automotive parts.
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