CN116218088A - Polypropylene material and preparation method and application thereof - Google Patents
Polypropylene material and preparation method and application thereof Download PDFInfo
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- CN116218088A CN116218088A CN202310320820.8A CN202310320820A CN116218088A CN 116218088 A CN116218088 A CN 116218088A CN 202310320820 A CN202310320820 A CN 202310320820A CN 116218088 A CN116218088 A CN 116218088A
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- Prior art keywords
- nucleating agent
- beta
- alpha
- polypropylene material
- polypropylene
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 97
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 97
- -1 Polypropylene Polymers 0.000 title claims abstract description 89
- 239000000463 material Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002667 nucleating agent Substances 0.000 claims abstract description 137
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 36
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 36
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 36
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound 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 abstract description 15
- 239000003484 crystal nucleating agent Substances 0.000 claims abstract description 14
- 239000012745 toughening agent Substances 0.000 claims abstract description 11
- 238000002425 crystallisation Methods 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 229920005606 polypropylene copolymer Polymers 0.000 claims abstract description 5
- 238000005422 blasting Methods 0.000 claims abstract description 4
- 239000013078 crystal Substances 0.000 claims description 44
- 239000003963 antioxidant agent Substances 0.000 claims description 14
- 230000003078 antioxidant effect Effects 0.000 claims description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 13
- 229910019142 PO4 Inorganic materials 0.000 claims description 12
- 239000010452 phosphate Substances 0.000 claims description 12
- 150000002910 rare earth metals Chemical class 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 11
- 150000008430 aromatic amides Chemical class 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 239000004611 light stabiliser Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 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 6
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 claims description 6
- 239000000454 talc Substances 0.000 claims description 6
- 229910052623 talc Inorganic materials 0.000 claims description 6
- 235000012222 talc Nutrition 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-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
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 239000000600 sorbitol 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
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 4
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 4
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000000344 soap Substances 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 19
- 238000010521 absorption reaction Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 238000009472 formulation Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- 230000006911 nucleation Effects 0.000 description 3
- 238000010899 nucleation Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- BTXXTMOWISPQSJ-UHFFFAOYSA-N 4,4,4-trifluorobutan-2-one Chemical class CC(=O)CC(F)(F)F BTXXTMOWISPQSJ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910001051 Magnalium Inorganic materials 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- RWLXQPUMMABMNX-UHFFFAOYSA-N [Ca].C(C1C(C(=O)O)CCC=C1)(=O)O Chemical compound [Ca].C(C1C(C(=O)O)CCC=C1)(=O)O RWLXQPUMMABMNX-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 2
- 235000010234 sodium benzoate Nutrition 0.000 description 2
- 239000004299 sodium benzoate Substances 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 229920001897 terpolymer Polymers 0.000 description 2
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 2
- MJPRYKBMEQUDDW-VEYOIHGOSA-N (1r,2r,4s)-2-[(1r)-1,2-dihydroxyethyl]-3,6-bis(4-methylphenyl)bicyclo[2.2.0]hexane-1,2,4,5-tetrol Chemical class C1=CC(C)=CC=C1C1[C@]2(O)[C@](O)([C@H](O)CO)C(C=3C=CC(C)=CC=3)[C@]2(O)C1O MJPRYKBMEQUDDW-VEYOIHGOSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- KSLLMGLKCVSKFF-UHFFFAOYSA-N 5,12-dihydroquinolino[2,3-b]acridine-6,7,13,14-tetrone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C(=O)C(C(=O)C1=CC=CC=C1N1)=C1C2=O KSLLMGLKCVSKFF-UHFFFAOYSA-N 0.000 description 1
- LNKJESSHRFPVPE-UHFFFAOYSA-N 5-(diethylamino)pentyl 3,4,5-trimethoxybenzoate;hydrochloride Chemical compound Cl.CCN(CC)CCCCCOC(=O)C1=CC(OC)=C(OC)C(OC)=C1 LNKJESSHRFPVPE-UHFFFAOYSA-N 0.000 description 1
- BQACOLQNOUYJCE-FYZZASKESA-N Abietic acid Natural products CC(C)C1=CC2=CC[C@]3(C)[C@](C)(CCC[C@@]3(C)C(=O)O)[C@H]2CC1 BQACOLQNOUYJCE-FYZZASKESA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- OFHGRWFJFOTSBD-UHFFFAOYSA-N C(C1=CC=CC=C1)(=O)NNC(C1=CC=CC=C1)=O.C(CCCCC(=O)O)(=O)O Chemical compound C(C1=CC=CC=C1)(=O)NNC(C1=CC=CC=C1)=O.C(CCCCC(=O)O)(=O)O OFHGRWFJFOTSBD-UHFFFAOYSA-N 0.000 description 1
- QUUCYKKMFLJLFS-UHFFFAOYSA-N Dehydroabietan Natural products CC1(C)CCCC2(C)C3=CC=C(C(C)C)C=C3CCC21 QUUCYKKMFLJLFS-UHFFFAOYSA-N 0.000 description 1
- NFWKVWVWBFBAOV-UHFFFAOYSA-N Dehydroabietic acid Natural products OC(=O)C1(C)CCCC2(C)C3=CC=C(C(C)C)C=C3CCC21 NFWKVWVWBFBAOV-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- ZGNIGAHODXRWIT-UHFFFAOYSA-K aluminum;4-tert-butylbenzoate Chemical compound [Al+3].CC(C)(C)C1=CC=C(C([O-])=O)C=C1.CC(C)(C)C1=CC=C(C([O-])=O)C=C1.CC(C)(C)C1=CC=C(C([O-])=O)C=C1 ZGNIGAHODXRWIT-UHFFFAOYSA-K 0.000 description 1
- CSJKPFQJIDMSGF-UHFFFAOYSA-K aluminum;tribenzoate Chemical compound [Al+3].[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1 CSJKPFQJIDMSGF-UHFFFAOYSA-K 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- FQUNFJULCYSSOP-UHFFFAOYSA-N bisoctrizole Chemical compound N1=C2C=CC=CC2=NN1C1=CC(C(C)(C)CC(C)(C)C)=CC(CC=2C(=C(C=C(C=2)C(C)(C)CC(C)(C)C)N2N=C3C=CC=CC3=N2)O)=C1O FQUNFJULCYSSOP-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- USYJXNNLQOTDLW-UHFFFAOYSA-L calcium;heptanedioate Chemical compound [Ca+2].[O-]C(=O)CCCCCC([O-])=O USYJXNNLQOTDLW-UHFFFAOYSA-L 0.000 description 1
- JILYTPDQRCHWPA-UHFFFAOYSA-L calcium;octanedioate Chemical compound [Ca+2].[O-]C(=O)CCCCCCC([O-])=O JILYTPDQRCHWPA-UHFFFAOYSA-L 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- PNZXMIKHJXIPEK-UHFFFAOYSA-N cyclohexanecarboxamide Chemical compound NC(=O)C1CCCCC1 PNZXMIKHJXIPEK-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940118781 dehydroabietic acid Drugs 0.000 description 1
- NFWKVWVWBFBAOV-MISYRCLQSA-N dehydroabietic acid Chemical compound OC(=O)[C@]1(C)CCC[C@]2(C)C3=CC=C(C(C)C)C=C3CC[C@H]21 NFWKVWVWBFBAOV-MISYRCLQSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000000664 diazo group Chemical group [N-]=[N+]=[*] 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012761 high-performance material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 229920005633 polypropylene homopolymer resin Polymers 0.000 description 1
- YDWJLQSXQLDMFP-YGJXXQMASA-M potassium;(1r,4as,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,9,10,10a-hexahydrophenanthrene-1-carboxylate Chemical compound [K+].[O-]C(=O)[C@]1(C)CCC[C@]2(C)C3=CC=C(C(C)C)C=C3CC[C@H]21 YDWJLQSXQLDMFP-YGJXXQMASA-M 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 150000003568 thioethers Chemical group 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
Abstract
The invention discloses a polypropylene material, a preparation method and application thereof, and relates to the technical field of polypropylene materials. The polypropylene material disclosed by the invention comprises the following components in parts by weight: 60-80 parts of high-crystallization copolymerized polypropylene resin, 5-10 parts of talcum powder, 15-25 parts of toughening agent, 2-4 parts of composite nucleating agent and 0-1 part of auxiliary agent, wherein the composite nucleating agent comprises alpha-crystal nucleating agent, beta-crystal nucleating agent and hydrotalcite; the crystallinity of the high-crystallinity polypropylene copolymer resin is 45-58%. The polypropylene material has low density, high rigidity and high-low temperature toughness, and is suitable for application in the fields of automobile seamless airbag instrument desk or upright posts with side curtain airbag blasting requirements and the like.
Description
Technical Field
The invention relates to the technical field of polypropylene materials, in particular to a polypropylene material and a preparation method and application thereof.
Background
The polypropylene material is one of the most widely applied nonmetallic materials in the current automobile field, and with the development of light weight and high performance of automobiles, the requirements on the density, rigidity and toughness of the material, especially the low-temperature toughness, are higher and higher.
The polypropylene (PP) material has low impact strength and poor toughness at the low temperature of-40 ℃ because the glass transition temperature is about minus 20 ℃ to minus 30 ℃. In general, a large amount of thermoplastic elastomer is required for low-temperature toughness of polypropylene materials, but the rigidity thereof is reduced due to the presence of the elastomer, and the rigidity of the materials can be improved by a large amount of talcum powder, but the density is increased, which is disadvantageous for light weight of the materials. CN113354914a discloses a polypropylene composite material capable of being blasted at low temperature, a preparation method and application thereof, wherein the content of talcum powder is more than or equal to 15%, the density is higher, and the weight reduction is not facilitated. CN106832600a adopts terpolymer as modifier to improve low temperature toughness of polypropylene material, but the terpolymer modifier is not easily available, and there are components incompatible with PP, such as siloxane, acrylic acid, etc., which may cause incompatibility.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a polypropylene material with low density, high rigidity and high low temperature toughness, and a preparation method and application thereof.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a polypropylene material comprising the following components in parts by weight: 60-80 parts of high-crystallization copolymerized polypropylene resin, 5-10 parts of talcum powder, 15-25 parts of toughening agent, 2-4 parts of composite nucleating agent and 0-1 part of auxiliary agent, wherein the composite nucleating agent comprises alpha-crystal nucleating agent, beta-crystal nucleating agent and hydrotalcite; the crystallinity of the high-crystallinity polypropylene copolymer resin is 45-58%.
Experiments show that the copolymer polypropylene with the crystallinity of 45-58% is selected as a matrix, and the composite nucleating agent is added, so that alpha crystals with higher strength can be generated under the induction of the alpha nucleating agent, a small amount of beta crystals with loose wafer arrangement can be formed under the induction of the beta nucleating agent, a buffer zone is formed between the alpha crystals with high strength and an amorphous area, and the proportion of the two crystals is regulated and controlled through the proportion of the nucleating agent, thereby not only ensuring the rigidity of the material, but also improving the capability of the material for absorbing energy after receiving impact deformation, and further improving the toughness. On the one hand, hydrotalcite is used as a dispersing agent of the nucleating agent, so that the nucleating agent can be uniformly dispersed, a better nucleating effect is exerted, nucleation points are more uniform, crystal grains are more refined, and both crystals are uniformly dispersed. On the other hand, hydrotalcite is distributed between two nucleating agents to isolate the nucleating agents, and independently induces nucleation, so that the mutual competitive influence of the nucleating agents is avoided, and the nucleation efficiency is reduced. The addition of a small amount of talcum powder with high mesh number and a toughening agent improves the rigidity and toughness of the material, so that the material has low density, balance rigidity and toughness and high low-temperature multiaxial maximum absorption energy.
Preferably, the crystallinity of the highly crystalline copolymerized polypropylene resin is 48% to 55%. When the crystallinity of the polypropylene copolymer resin meets the requirements, the polypropylene copolymer resin can better act with the composite nucleating agent, and the rigidity and toughness of the polypropylene material are improved.
Preferably, the mass ratio of the alpha crystal form nucleating agent to the beta crystal form nucleating agent in the composite nucleating agent is (1-2): 1, the total content of the alpha crystal form nucleating agent and the beta crystal form nucleating agent in the composite nucleating agent is 8-15 wt%. The beta-crystal nucleating agent induces PP to form a small amount of beta-crystals with loose wafer arrangement in a high-crystallization copolymerization PP system, a buffer area is formed between the alpha-crystal and the amorphous area with high strength, and the toughening agent is used for toughening, so that the toughness of the material is greatly improved, but the content of the beta-crystal nucleating agent is too high, the rigidity cannot be improved, the hydrotalcite can accelerate the crystallization process, the crystallization behavior of the resin is regulated, and the good rigidity and toughness of the polypropylene material can be ensured by controlling the proportion and the total content of the alpha-crystal nucleating agent and the beta-crystal nucleating agent in the above range.
Preferably, the alpha crystal form nucleating agent is at least one of aromatic acid metal soap alpha nucleating agent, sorbitol alpha nucleating agent, rosin alpha nucleating agent and organic phosphate alpha nucleating agent, and the beta crystal form nucleating agent is at least one of inorganic oxide beta nucleating agent, inorganic salt beta nucleating agent, polycyclic aromatic hydrocarbon beta nucleating agent, organic carboxylic acid and salt beta nucleating agent thereof, aromatic amide beta nucleating agent and rare earth beta nucleating agent; the hydrotalcite is at least one of magnesium aluminum hydrotalcite, magnesium aluminum zinc hydrotalcite and calcium aluminum hydrotalcite.
The aromatic acid metal soap alpha nucleating agent is at least one selected from sodium benzoate, aluminum benzoate and aluminum p-tert-butylbenzoate which are metal salts of aromatic carboxylic acid; the sorbitol alpha nucleating agent is at least one selected from dibenzylidene sorbitol, substituted dibenzylidene sorbitol, 1,3:2, 4-di-p-methyl benzylidene sorbitol and di- (3, 4-dimethyl dibenzylidene) sorbitol; the rosin alpha nucleating agent is at least one selected from dehydroabietic acid, abietic acid salt, a mixture of abietic acid and salts thereof and rosin amide; the organic phosphate alpha nucleating agent is at least one selected from organic phosphate, organic phosphate basic metal salt and compound.
The inorganic salt beta nucleating agent is at least one selected from calcium silicate, calcium carbonate and calcium sulfate; the polycyclic aromatic hydrocarbon beta nucleating agent is at least one selected from quinacridone quinone, trimellitic acid and diazo yellow; the organic carboxylic acid beta nucleating agent is at least one selected from adipic acid dibenzoyl hydrazine and suberic acid; the organic carboxylate beta nucleating agent is at least one selected from tetrahydrophthalic acid calcium, calcium suberate, calcium pimelate, calcium salt of polycarboxylic acid and zinc salt of polycarboxylic acid; the aromatic amide beta nucleating agent is at least one selected from 2, 6-phthalic acid cyclohexanamide, 2, 6-naphthalene dicarboxylic acid cyclohexanamide and aryl dicarboxamide; the rare earth beta nucleating agent is at least one selected from rare earth lanthanide series mononuclear metal compounds, rare earth polynary complexes and binuclear complexes formed by rare earth and IIA group metals; the inorganic oxide beta nucleating agent is selected from aluminum oxide.
Further preferably, the alpha-crystal form nucleating agent is an organic phosphate alpha-crystal form nucleating agent, and the beta-crystal form nucleating agent is at least one of an aromatic amide beta-crystal form nucleating agent and a rare earth beta-crystal form nucleating agent. According to the experimental invention, the alpha crystal form nucleating agent and the beta crystal form nucleating agent can synergistically improve the mechanical properties of the polypropylene material, and the low-temperature multiaxial maximum absorption energy of the material is improved; the hydrotalcite is calcium aluminum hydrotalcite.
Preferably, the preparation method of the composite nucleating agent comprises the following steps: mixing an alpha crystal form nucleating agent, a beta crystal form nucleating agent and hydrotalcite to obtain mixed powder, adding water into the mixed powder, and extruding and granulating to obtain the composite nucleating agent; the addition amount of the water is 1.5-2.5 times of that of the mixed powder, and the extrusion pressure is 0.5-7 MPa.
Preferably, the talc has a D50 particle size of 4.5 μm or less. Controlling the particle size of the talc within the above range can effectively increase the rigidity of the polypropylene material and ensure that the polypropylene material has a lower density.
Preferably, the toughening agent is at least one of ethylene-butene copolymer and ethylene-octene copolymer.
Preferably, the auxiliary agent is an antioxidant and a light stabilizer; the antioxidant comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is a hindered phenol antioxidant such as antioxidant 1010, the auxiliary antioxidant is a thioether antioxidant such as antioxidant 412s, and the light stabilizer is a hindered amine light stabilizer.
Meanwhile, the invention also discloses a preparation method of the polypropylene material, which comprises the following steps:
(1) Uniformly mixing the components according to the proportion to obtain a premix;
(2) And adding the premix into a double-screw extruder, and carrying out melt blending, extrusion and granulation to obtain the polypropylene material.
The melt extrusion conditions of the twin-screw extruder are as follows: the first area temperature is 80-120 ℃, the second area temperature is 180-200 ℃, the third area temperature is 180-220 ℃, the fourth area temperature is 180-220 ℃, the fifth area temperature is 180-220 ℃, the sixth area temperature is 180-220 ℃, the seventh area temperature is 180-220 ℃, the eighth area temperature is 180-220 ℃, and the ninth area temperature is 180-220 ℃.
In addition, the invention also discloses application of the polypropylene material in the fields of preparation of automobile instrument panels and automobile explosion stand columns.
Compared with the prior art, the invention has the beneficial effects that:
the invention takes the high-crystallization copolymerized polypropylene as matrix resin, the rigidity and toughness of the polypropylene material are obviously improved by adding the composite nucleating agent, meanwhile, the mechanical property of the polypropylene material is further improved by screening the components of the composite nucleating agent and further synergistically improving the components of the composite nucleating agent, the talcum powder and the toughening agent, the low-temperature multiaxial maximum absorption energy of the polypropylene material is improved, and the polypropylene material has lower density and is suitable for being applied to the fields of automobile seamless airbag instrument desk or upright posts with side curtain blasting requirements and the like.
Detailed Description
For a better description of the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
The materials used in the examples and comparative examples are commercially available unless otherwise specified. The materials used in the examples and comparative examples are as follows:
high crystalline copolymerized polypropylene resin 1: PP EP5074X, middlesand petrochemicals limited, crystallinity 48%;
high crystalline copolymerized polypropylene resin 2: PP BX3800, korea SK, crystallinity 55%;
high crystalline copolymerized polypropylene resin 3: PP BI997, han Huadao dar, crystallinity 45%;
high crystalline copolymerized polypropylene resin 4: PP BX3900, korea SK, crystallinity 58%;
copolymerized polypropylene resin 1: PP EP548R, middle sea shell petrochemical company, crystallinity 41%;
copolymerized polypropylene resin 2: PP BX3920, korea SK, crystallinity 59.6%;
homo-polypropylene resin: N-Z30S, china petrochemical industry Co., ltd, crystallinity 48%;
talcum powder 1: HAR 3G77L, shanghai Hua Zhongrong industry Co., ltd., 2.3 μm;
talcum powder 2: TYT-3000A, 4.5 μm, guangzhou Tianyuan chemical industry Co., ltd;
talcum powder 3: HAR T84, shanghai Hua Zhongrong trade Co., ltd., 2.0 μm;
talcum powder 4: TYT-777A, 5.7 μm, a company of chemical industry, inc. of chemical industry, sea city and day;
alpha crystal form nucleating agent 1: an organic phosphate alpha nucleating agent, TMP-6, bis [2,2' -methylenebis (4, 6-di-tert-butylphenyl) phosphate ] hydroxyaluminate, shanxi province chemical industry institute;
alpha crystal form nucleating agent 2: aromatic acid metal soap alpha nucleating agent, NAR-6, sodium benzoate, guangzhou Law and technology Co., ltd;
alpha crystal form nucleating agent 3: sorbitol alpha nucleating agent, NA-98, dibenzylidene sorbitol, guangzhou corporation of science and technology;
alpha crystal form nucleating agent 4: rosin alpha nucleating agent, KM-1600, potassium dehydroabietate, japanese Decoct;
beta-form nucleating agent 1: aromatic amide beta nucleating agent, TMB-5, aryl dimethylamide, shanxi province chemical institute;
beta-form nucleating agent 2: rare earth beta nucleating agent, WBG-II, binuclear complex formed by rare earth and IIA group metal, guangdong Weilin Nafiinc;
beta crystal form nucleating agent 3: inorganic oxide beta nucleating agent, nano aluminum oxide, hebei cast and ground alloy materials Co., ltd;
beta-form nucleating agent 4: inorganic salt beta nucleating agent, nano calcium silicate, and Tuoyi new materials Co., ltd;
beta-form nucleating agent 5: polycyclic aromatic hydrocarbon beta nucleating agent, gamma-quinacridone (E3B), clariant chemical (China) Co;
beta-form nucleating agent 6: organic carboxylic acid beta nucleating agent, NAB-82, tetrahydrophthalic acid calcium, guangzhou corporation of science and technology;
hydrotalcite 1: calcium aluminum hydrotalcite, HG-100, hunan Heng optical technologies Co., ltd;
hydrotalcite 2: magnalium hydrotalcite, AC-320, available from the Co.Ltd;
hydrotalcite 3: magnalium zinc hydrotalcite, AZ-128, available from sciences and technologies;
toughening agent: POE ENGAGE 8842, dow chemical limited;
an antioxidant: a compound with the mass ratio of the antioxidant 1010 to the antioxidant 168 being 1:1, which is commercially available;
light stabilizers: hindered amine light stabilizers, commercially available.
The antioxidants and light stabilizers used in the examples and comparative examples are all the same commercial products.
The crystallinity is tested by DSC method, 10mg of sample is taken, the temperature is increased to 220 ℃ at the speed of 10 ℃/min under the nitrogen atmosphere, the temperature is kept constant for 5min, the temperature is reduced to normal temperature at the speed of 10 ℃/min, and finally the temperature is increased to 220 ℃ at the speed of 10 ℃/min. As shown in formula (1), the ratio of the melting enthalpy of the secondary temperature rise to the 100% crystallization enthalpy (209J/g) of the polypropylene is the crystallinity of the polypropylene.
Wherein: x is X ch Crystallinity of the polymer, as determined by DSC,%;
△H f melting enthalpy of the polymer, J.g -1 ；
Example 1
An example of the polypropylene material of the present invention, the formulation of the polypropylene material of the present example is shown in table 1, and the preparation method is as follows:
(1) Weighing an alpha crystal form nucleating agent, a beta crystal form nucleating agent and hydrotalcite according to a proportion, uniformly stirring in a high-speed stirrer, adding water into the obtained powder mixture, stirring, wherein the weight of the water is 2 times of that of the powder, uniformly stirring the powder and the water, extruding and granulating, the extruding pressure is 5MPa, and drying granules obtained by extruding and granulating to obtain the composite nucleating agent.
(2) Adding the high-crystallization copolymerized polypropylene resin, talcum powder, a toughening agent, a composite nucleating agent, an antioxidant and a light stabilizer into a high-speed mixer, and mixing for 3min to obtain a premix;
(3) Adding the premix into a main feeding port of a double-screw extruder for melt extrusion to obtain the polypropylene material; the melt extrusion conditions were: one region of temperature 100 ℃, two regions of temperature 180 ℃, three regions of temperature 200 ℃, four regions of temperature 200 ℃, five regions of temperature 200 ℃, six regions of temperature 200 ℃, seven regions of temperature 200 ℃, eight regions of temperature 200 ℃, nine regions of temperature 200 ℃, and the length-diameter ratio of the screw is 40:1.
Examples 2 to 11
Examples of the polypropylene materials of the present invention, the formulations of the polypropylene materials of examples 2 to 11 are shown in Table 1, and the preparation method is the same as that of example 1.
Comparative examples 1 to 3
Comparative examples 1 to 3 are polypropylene materials, the formulation of which is shown in table 1, and the preparation method is the same as example 1.
Table 1 (weight portions)
Example 12
In one embodiment of the polypropylene material of the present invention, the formulation of the polypropylene material of the present embodiment is the same as that of the embodiment 1, and the preparation method is as follows:
(1) Adding high-crystallization copolymerized polypropylene resin, talcum powder, a toughening agent, an alpha crystal form nucleating agent, a beta crystal form nucleating agent, hydrotalcite, an antioxidant and a light stabilizer into a high-speed mixer, and mixing for 3min to obtain a premix;
(2) Adding the premix into a main feeding port of a double-screw extruder for melt extrusion to obtain the polypropylene material; the melt extrusion conditions were: one region of temperature 100 ℃, two regions of temperature 180 ℃, three regions of temperature 200 ℃, four regions of temperature 200 ℃, five regions of temperature 200 ℃, six regions of temperature 200 ℃, seven regions of temperature 200 ℃, eight regions of temperature 200 ℃, nine regions of temperature 200 ℃, and the length-diameter ratio of the screw is 40:1.
Examples 13 to 15
Examples of the polypropylene materials of the present invention, examples 13 to 15 differ from example 1 only in the type of the high crystalline copolymerized polypropylene resin, and examples 13 to 15 use the high crystalline copolymerized polypropylene resins of 2 to 4, respectively.
Examples 16 to 18
Examples of polypropylene materials according to the present invention, examples 16 to 18 differ from example 1 only in the type of talc, and examples 16 to 18 used talc were talc powders 2 to 4, respectively.
Examples 19 to 28
In the embodiment of the polypropylene material of the present invention, the differences between the embodiments 19 to 21 and the embodiment 1 are that the types of the alpha crystal form nucleating agents are different and are respectively the alpha crystal form nucleating agents 2 to 4; examples 22 to 26 differ from example 1 only in the type of the β -crystal form nucleating agent, which is β -crystal form nucleating agent 2 to 6, respectively; examples 27 to 28 differ from example 1 only in the types of hydrotalcite, hydrotalcite 2 and hydrotalcite 3, respectively.
Comparative examples 4 to 6
Comparative examples 4 to 6 are polypropylene materials, and comparative examples 4 to 6 differ from example 1 only in that the high-crystalline copolymerized polypropylene resin 1 was replaced with the copolymerized polypropylene resin 1, the copolymerized polypropylene resin 2, and the homo-polymerized polypropylene resin, respectively.
The polypropylene materials of examples and comparative examples were subjected to performance tests, the test criteria are as follows, and the test results are shown in Table 2.
Tensile strength: test with reference to ISO527-1-2012, test speed 50mm/min, using 1A spline;
notched impact strength of simply supported beams: test with reference to ISO179-2010, spline dimensions 80 x 10 x 4mm, notch machined, notch retention thickness 8.0±0.2mm;
flexural modulus: test with reference to ISO 178-2019, speed is 2mm/min, spline size is 80 x 10 x 4mm;
density: testing with reference to ISO 1183-1-2019;
-40 ℃ multiaxial impact toughness and-40 ℃ multiaxial impact maximum absorption energy: the test was conducted with reference to ASTM D3763-2010, with an impact speed of 6.6m/s, an impact head diameter of 12.7mm, a support ring diameter of 76.2mm, and a spline size of 100 x 3mm.
TABLE 2
As shown in Table 2, the polypropylene materials in examples 1 to 28 have good rigidity, toughness and strength, the multiaxial impact toughness rate at-40 ℃ can reach more than 60%, the multiaxial impact maximum absorption energy at-40 ℃ can reach more than 20J, and the density is low, so that the polypropylene material is suitable for being applied to the fields of automobile seamless airbag instrument desk or upright posts with side curtain blasting requirements and the like.
The formulas and test results of comparative example 1 and examples 4 to 7 show that the components of the composite nucleating agent have a great influence on the performance of the polypropylene material, and the mass ratio of the alpha-crystal nucleating agent to the beta-crystal nucleating agent in the composite nucleating agent is (1-2): 1, the polypropylene material has good multiaxial impact performance, the multiaxial impact toughness rate at-40 ℃ can reach 100%, and the maximum absorption energy of multiaxial impact at-40 ℃ can reach more than 24J.
The formulas and test results of comparative examples 1 and examples 8 to 11 show that the polypropylene material has better multiaxial impact performance when the total content of the alpha-crystal nucleating agent and the beta-crystal nucleating agent in the composite nucleating agent is 8wt% to 15wt%. The unique layered double metal of hydrotalcite has good adsorption effect, can be fully dispersed through interaction with nucleating agent powder, is favorable for the nucleating agent to be dispersed in a PP matrix more well, has higher nucleating efficiency, and has finer crystal induced by the two nucleating agents, and the two nucleating agents are mutually laminated to achieve the simultaneous improvement of rigidity and toughness. When the content of the two crystal forms of nucleating agents is low, hydrotalcite can inhibit the action of the nucleating agents, so that the performance is reduced; when the content of the two crystal forms of nucleating agents is too high, the hydrotalcite is difficult to have the effect of uniform dispersion, and the two nucleating agents compete with each other to not have the effect of fine and alternate uniform dispersion of the two crystal forms, so that the effect is poor.
The preparation methods of comparative examples 1 and 12 can find that the polypropylene material prepared using the composite nucleating agent obtained by extrusion granulation has significantly better low-temperature multiaxial impact properties.
The test results of comparative example 1 and examples 13-15 show that high performance materials can be prepared with high crystallinity of 48% -58% for high crystalline polypropylene, with higher rigidity and toughness, and higher energy absorption; example 14 has a relatively low crystallinity, low flexural modulus, resulting in a lower multiaxial impact maximum absorption energy at-40 ℃; example 15 has a relatively high degree of crystallinity and poor toughness, and also results in a multiaxial impact maximum absorption energy at-40 ℃ that is too low.
As is clear from the test results of example 1 and examples 16 to 18, the polypropylene material has relatively better comprehensive properties when the particle size of talcum powder D50 is less than or equal to 4.5 mu m, the modulus of example 18 is greatly reduced, the material is softer, the absorption energy is lower during impact, and the maximum absorption energy is reduced.
As can be seen from the test results of comparative examples 1 and 19 to 28, the organic phosphate alpha nucleating agent has the best effect of compounding with aromatic amide or rare earth beta nucleating agent and calcium aluminum hydrotalcite, because the nucleating efficiency of different nucleating agents is different, and when the organic phosphate alpha nucleating agent and the aromatic amide or rare earth beta nucleating agent are matched, good stiffening and toughening effects can be achieved when the organic phosphate alpha nucleating agent and the aromatic amide or rare earth beta nucleating agent are matched.
The comparative example 1 has no hydrotalcite, the nucleating agent cannot be well dispersed, the content of the composite nucleating agent of the comparative example 2 is higher, the agglomeration problem exists, the talcum powder of the comparative example 3 has low content and very low modulus, the maximum absorption energy of multiaxial impact at-40 ℃ is only 19.8J, the ordinary copolymerized PP is selected for the comparative example 4, the rigidity of the material is low, the absorption energy is low, the crystallinity of the PP matrix selected for the comparative example 5 is too high, the impact performance is low, the toughness is only 20%, the toughness of the homo-polymerized PP is worst, the toughness of 0% is broken, and the absorption energy is only 14.4J.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. The polypropylene material is characterized by comprising the following components in parts by weight: 60-80 parts of high-crystallization copolymerized polypropylene resin, 5-10 parts of talcum powder, 15-25 parts of toughening agent, 2-4 parts of composite nucleating agent and 0-1 part of auxiliary agent, wherein the composite nucleating agent comprises alpha-crystal nucleating agent, beta-crystal nucleating agent and hydrotalcite; the crystallinity of the high-crystallinity polypropylene copolymer resin is 45-58%.
2. The polypropylene material of claim 1, wherein the high crystalline co-polypropylene resin has a crystallinity of 48% to 55%.
3. The polypropylene material of claim 1, wherein the composite nucleating agent comprises the following alpha-form nucleating agent and beta-form nucleating agent in a mass ratio of (1-2): 1, the total content of the alpha crystal form nucleating agent and the beta crystal form nucleating agent in the composite nucleating agent is 8-15 wt%.
4. The polypropylene material of claim 1, wherein the alpha-form nucleating agent is at least one of aromatic acid metal soap alpha nucleating agent, sorbitol alpha nucleating agent, rosin alpha nucleating agent, and organic phosphate alpha nucleating agent, and the beta-form nucleating agent is at least one of inorganic oxide beta nucleating agent, inorganic salt beta nucleating agent, polycyclic aromatic hydrocarbon beta nucleating agent, organic carboxylic acid and salt beta nucleating agent thereof, aromatic amide beta nucleating agent, and rare earth beta nucleating agent; the hydrotalcite is at least one of magnesium aluminum hydrotalcite, magnesium aluminum zinc hydrotalcite and calcium aluminum hydrotalcite.
5. The polypropylene material of claim 4, wherein the alpha-form nucleating agent is an organic phosphate alpha-form nucleating agent, and the beta-form nucleating agent is at least one of an aromatic amide beta-form nucleating agent and a rare earth beta-form nucleating agent; the hydrotalcite is calcium aluminum hydrotalcite.
6. The polypropylene material of claim 1, wherein the composite nucleating agent is prepared by the following steps: uniformly mixing the alpha crystal form nucleating agent, the beta crystal form nucleating agent and the hydrotalcite, adding water, and extruding and granulating to obtain the composite nucleating agent.
7. The polypropylene material of claim 1, wherein the talc has a D50 particle size of 4.5 μm or less.
8. The polypropylene material of claim 1, wherein the toughening agent is at least one of an ethylene-butene copolymer and an ethylene-octene copolymer, and the auxiliary agent is an antioxidant and a light stabilizer.
9. A method for preparing a polypropylene material according to any one of claims 1 to 8, comprising the steps of:
(1) Uniformly mixing the components according to the proportion to obtain a premix;
(2) And adding the premix into a double-screw extruder, and carrying out melt blending, extrusion and granulation to obtain the polypropylene material.
10. Use of a polypropylene material according to any one of claims 1 to 8 for the preparation of automotive dashboards and automotive blasting pillars.
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