CN110894319A - Polypropylene material for battery cover plate and preparation method thereof - Google Patents
Polypropylene material for battery cover plate and preparation method thereof Download PDFInfo
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- CN110894319A CN110894319A CN201911033388.4A CN201911033388A CN110894319A CN 110894319 A CN110894319 A CN 110894319A CN 201911033388 A CN201911033388 A CN 201911033388A CN 110894319 A CN110894319 A CN 110894319A
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- polypropylene
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- cover plate
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 67
- -1 Polypropylene Polymers 0.000 title claims abstract description 57
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000003063 flame retardant Substances 0.000 claims abstract description 30
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 15
- 239000012745 toughening agent Substances 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 14
- 239000003607 modifier Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 12
- 239000003086 colorant Substances 0.000 claims description 9
- 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 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000009775 high-speed stirring Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 4
- 229930195729 fatty acid Natural products 0.000 claims description 4
- 239000000194 fatty acid Substances 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 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 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 3
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 150000002193 fatty amides Chemical class 0.000 claims description 2
- 229920002521 macromolecule Polymers 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 239000011574 phosphorus Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 2
- HEAMQYHBJQWOSS-UHFFFAOYSA-N ethene;oct-1-ene Chemical compound C=C.CCCCCCC=C HEAMQYHBJQWOSS-UHFFFAOYSA-N 0.000 claims 1
- 229920006342 thermoplastic vulcanizate Polymers 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 7
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000155 melt Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 102200017650 rs28383586 Human genes 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 229920001169 thermoplastic Polymers 0.000 description 3
- 239000004416 thermosoftening plastic Substances 0.000 description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 description 1
- VNQNXQYZMPJLQX-UHFFFAOYSA-N 1,3,5-tris[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CN2C(N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C(=O)N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C2=O)=O)=C1 VNQNXQYZMPJLQX-UHFFFAOYSA-N 0.000 description 1
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003508 Dilauryl thiodipropionate Substances 0.000 description 1
- 229920001431 Long-fiber-reinforced thermoplastic Polymers 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical group [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000412 dendrimer Substances 0.000 description 1
- 229920000736 dendritic polymer Polymers 0.000 description 1
- 235000019304 dilauryl thiodipropionate Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 239000002699 waste material 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
- C08L23/12—Polypropene
-
- 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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides a polypropylene material for a battery cover plate, which is characterized by being prepared from the following raw materials in percentage by mass: polypropylene: 40% -70%, flame retardant: 20-35%, toughening agent: 3% -10%, lubricant: 0.2% -1.5%, dispersant: 0.5% -3%, antioxidant: 0.1% -1%, compatilizer: 3% -10%, flow modifier: 0.5 to 4 percent. According to the invention, the copolymerized and homopolymerized polypropylene is mixed according to a certain proportion, and a certain amount of toughening agent is added, so that the toughness of the material is improved while the rigidity is ensured; the unnotched impact strength is 15kJ/m2Increased to 30kJ/m2The material has high flowability, high bending modulus and high flame retardance reaching V-0 level.
Description
Technical Field
The invention belongs to the field of modified polypropylene composite materials, and particularly relates to a polypropylene material for producing a battery cover plate by adopting an LFT-D technology and a preparation method thereof.
Background
By 2018, the automobile quantity of our country is 2.35 hundred million, and the automobile is one of the countries which have the most automobiles in the world. However, the increasing energy and environmental problems are also highlighted while the number of automobiles is rapidly increased. In view of the above problems, our country will develop new energy vehicles as a revolution in the automotive industry. The new energy automobile needs to be improved in light weight in order to achieve energy conservation and emission reduction, and the automobile battery is used as a core component on the new energy automobile, so that light weight processing is performed on the new energy automobile first.
The LFT-D forming technology is a new long fiber reinforced thermoplastic composite material process technology after GMT and LFT-G, and the key factor different from GMT and LFT-G is that the semi-finished product step is omitted, so that the selection of materials is more flexible. In the LFT-D technique, not only the fiber content and the fiber length can be directly adjusted to the requirements of the final part, but also the matrix polymer thereof. The mechanical and application-specific properties of the article, such as stability, colorability, uv stability and adhesion properties of the fibers to the matrix, can be modified and influenced by the use of different additives.
The original metal material or SMC material that uses of car battery apron, under the background of lightweight and environmental protection, the metal material has the shortcoming of overweight and shaping with high costs partially. The used SMC material cannot be recycled after being molded, only can take the treatment measures of burying and burning the waste and old workpieces, and does not accord with the current policy environment of energy conservation and emission reduction. Battery cover sheet material is currently being replaced by thermoplastic. Polypropylene, as a thermoplastic, is becoming more popular for use in battery lids because of its low cost, light weight, good corrosion resistance and formability, good overall performance, easy recycling, and the like. The LFT-D process requires that polypropylene has high fluidity and flexural modulus, but polypropylene is flammable, and a flame retardant needs to be added to meet the requirement of the flame retardant property of the battery cover plate. The addition of flame retardants can lead to a severe reduction in the impact properties of the material. During the assembly process, the cracking of the product often occurs, and the product is scrapped. The cover plate is used as a protective barrier of the battery, and the cover plate is inevitable to be impacted in the using process, so that the risk of cracking after being impacted exists subsequently, and the improvement of the impact property of the battery cover plate material prepared by the LFT-D process is very necessary.
The Chinese patent application with publication number CN105670105A discloses a high-flow, high-modulus and flame-retardant polypropylene composite material for LFT-D production process, wherein the selected flame-retardant system is a traditional system compounded by decabromodiphenylethane and antimony trioxide, and can generate HBr and other irritant gases during combustion, thereby bringing great harm to people and environment and being not suitable for battery cover plates.
Chinese patent application publication No. CN 109181093a discloses a flame retardant polypropylene material, which uses non-woven fabric as a main base material, and the material can meet the molding and flame retardant requirements of a manufactured part, but has the disadvantage of low impact strength, and has the risk of cracking during the assembly of the manufactured part.
In summary, as a material for battery covers prepared by LFT-D technology, it is necessary to improve the impact properties of the material on the premise of ensuring high fluidity, high modulus and good flame retardant effect.
Disclosure of Invention
The invention aims to provide a polypropylene material for producing a battery cover plate by adopting an LFT-D technology and a preparation method thereof, aiming at solving the problems of reduced impact strength, insufficient fluidity and the like caused by adding a flame retardant in the prior art under the condition that the current LFT-D technology has high fluidity, high modulus and V-0 level flame retardant requirements on a composite material.
The invention is realized by the following technical scheme:
the invention aims to provide a polypropylene material for a battery cover plate, which is characterized by being prepared from the following raw materials in percentage by mass:
polypropylene: 40 to 70 percent of the total weight of the mixture,
flame retardant: 20 to 35 percent of the total weight of the mixture,
a toughening agent: 3 to 10 percent of the total weight of the mixture,
lubricant: 0.2 to 1.5 percent of,
dispersing agent: 0.5 to 3 percent of the total weight of the mixture,
antioxidant: 0.1 to 1 percent of the total weight of the mixture,
a compatilizer: 3 to 10 percent of the total weight of the mixture,
flow modifier: 0.5 to 4 percent;
the polypropylene is prepared from homopolymerized polypropylene and copolymerized polypropylene according to the mass ratio (0.5-1.5): 1, the melt index is 50-100 g/10min at 230 ℃ and 2.16 kg;
the flame retardant is a nitrogen-phosphorus intumescent flame retardant, the N content is 14-17%, and the P content is 23-25%; one or a mixture of several nitrogen and phosphorus intumescent flame retardants with the N content of 15-16% is preferred. For example: exolit AP766, a Craine flame retardant;
the elastomer toughening agent is one or a mixture of more of polyolefin elastomer ethylene octene copolymer (POE), polyolefin thermoplastic elastomer (TPO), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butadiene-styrene copolymer (SEBS), thermoplastic vulcanized rubber (TPV) and Ethylene Propylene Diene Monomer (EPDM); the density is 0.80 to 0.95g/cm3Under the test conditions of 190 ℃ and 5kg, the melt index is 0.5-40 g/10 min;
the antioxidant is one or a mixture of more of an antioxidant 1010 (tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester), an antioxidant 168 (tris (2, 4-di-tert-butylphenyl) phosphite), an antioxidant 3114 (1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid) and an antioxidant DLTP (dilauryl thiodipropionate);
the lubricant is one or a mixture of more of fatty acid, fatty acid salt, fatty amide and polyethylene wax;
the dispersant is a dendrimer, such as JW-6 from Shanghai Jiu company;
the compatilizer is polypropylene grafted maleic anhydride, wherein the grafting rate of the maleic anhydride is 1-1.5%;
the flow modifier is polypropylene master batch containing peroxide, such as a product of P6006 brand manufactured by Isatoton, Shanghai, New materials, Inc.
Furthermore, the polypropylene material for the battery cover plate also comprises 0.5-1.5% of colorant.
The second purpose of the invention is to provide a preparation method of the polypropylene material for the battery cover plate, which comprises the following steps:
uniformly mixing the raw materials such as the polypropylene, the toughening agent, the flame retardant, the compatilizer, the flow modifier, the antioxidant, the dispersing agent, the lubricant, the coloring agent and the like under high-speed stirring, and then feeding the mixture into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
Further, the diameter of a screw of the double-screw extruder is 35mm, the length-diameter ratio is 40, the temperature from the feed inlet to the head is 120 ℃, 180 ℃, 190 ℃, 180 ℃, 170 ℃ in sequence, and the rotating speed of the main machine is 400 r/min.
Compared with the prior art, the invention has the following advantages:
according to the invention, the copolymerized and homopolymerized polypropylene is mixed according to a certain proportion, and a certain amount of toughening agent is added, so that the toughness of the material is improved while the rigidity is ensured; the unnotched impact strength is 15kJ/m2Increased to 30kJ/m2The material has high flowability, high bending modulus and high flame retardance reaching V-0 level.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below, and all other embodiments obtained by those skilled in the art without any creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Description of the raw materials used in the present invention:
PP K8065: the polypropylene copolymer and the Taiwan chemical fiber have the melt index of 60g/10min (230 ℃, 2.16 kg);
PP M50 RH: copolymerized polypropylene, and has a melt index of 50g/10min (230 ℃ and 2.16kg) in a sea-calming petrochemical manner;
PP BX 3920: homo-polypropylene, SK in Korea, with a melt index of 100g/10min (230 ℃, 2.16 kg);
PP M60T: homo-polypropylene, sea-land petrochemical, melt index 60g/10min (230 ℃, 2.16 kg);
POE DF 610: polyolefin toughening agent with a density of 0.86g/cm3；
Flame retardant: flame retardant Exolit AP766, CLARIANT Kelain;
lubricant: lubricant TR044, STRUKTOL, USA;
dispersing agent: dendritic carboxyl macromolecule JW-6, Shanghai Jiu New Material science and technology Co., Ltd;
a compatilizer: maleic anhydride grafted polypropylene CMG5001, Shanghai Ri Sheng New Material Co., Ltd., chemical grafting rate of 1%;
flow modifier: polypropylene master batch P6006 containing peroxide, shanghai ishitong new materials ltd.
The twin-screw extruders used in the examples and comparative examples had a screw diameter of 35mm and a length-to-diameter ratio of 40, and the temperatures from the feed port to the die were 120 ℃, 180 ℃, 190 ℃, 180 ℃, 170 ℃ and the rotation speed of the main machine was 400 rpm.
Example 1
Adding copolymerized PP K8065 and homopolymerized PP BX3920 according to the proportion of 1:1, wherein the total addition amount of the two PPs is 56.4 parts, 5 parts of a toughening agent POE DF610, 30 parts of a flame retardant AP766, 3 parts of a compatilizer CMG5001, 3 parts of a flow modifier P6006, 0.2 part of an antioxidant 1010, 0.4 part of an antioxidant DSTP, 1 part of a lubricant TR044 and 1 part of a dispersing agent JW-6 are uniformly mixed under high-speed stirring, and then the mixture is fed into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
Example 2
Adding copolymerized PP M50RH and homopolymerized PP BX3920 according to the proportion of 0.5:1, wherein the total addition amount of the two PPs is 54.4 parts, 3 parts of toughening agent POE DF610, 32 parts of flame retardant AP766, 4 parts of compatilizer CMG5001, 3 parts of flow modifier P6006, 0.2 part of antioxidant 1010, 0.4 part of antioxidant DSTP, 1 part of lubricant TR044, 1 part of dispersant JW-6 and 1 part of colorant, uniformly mixing the two PPs under high-speed stirring, and then feeding the mixture into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
Example 3
Adding copolymerized PP K8065 and homopolymerized PP M60T according to the proportion of 1.5:1, wherein the total addition amount of the two PPs is 55.4 parts, 3 parts of toughening agent POE DF610, 30 parts of flame retardant AP766, 5 parts of compatilizer CMG5001, 3 parts of flow modifier P6006, 0.2 part of antioxidant 1010, 0.4 part of antioxidant DSTP, 1 part of lubricant TR044, 1 part of dispersant JW-6 and 1 part of colorant, uniformly mixing the two PPs under high-speed stirring, and then feeding the mixture into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
Example 4
Adding copolymerized PP M50RH and homopolymerized PP M60T according to the proportion of 0.5:1, wherein the total addition amount of the two PPs is 56.4 parts, 3 parts of toughening agent POE DF610, 30 parts of flame retardant AP766, 4 parts of compatilizer CMG5001, 3 parts of flow modifier P6006, 0.2 part of antioxidant 1010, 0.4 part of antioxidant DSTP, 1 part of lubricant TR044, 1 part of dispersant JW-6 and 1 part of colorant are uniformly mixed under high-speed stirring, and then, the mixture is fed into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
Comparative example 1
60.4 parts of PP M60T, 30 parts of flame retardant AP766, 4 parts of compatilizer CMG5001, 3 parts of flow modifier P6006, 0.2 part of antioxidant 1010, 0.4 part of antioxidant DSTP, 1 part of lubricant TR044, 1 part of dispersant JW-6 and 1 part of colorant are uniformly mixed under high-speed stirring, and then the mixture is fed into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
Comparative example 2
60.4 parts of PP M50RH, 30 parts of flame retardant AP766, 4 parts of compatilizer CMG5001, 3 parts of flow modifier P6006, 0.2 part of antioxidant 1010, 0.4 part of antioxidant DSTP, 1 part of lubricant TR044, 1 part of dispersant JW-6 and 1 part of colorant are uniformly mixed under high-speed stirring, and then the mixture is fed into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
The polypropylene materials prepared in examples 1 to 4 and comparative examples 1 to 2 were subjected to performance tests according to the standards and conditions listed in Table 1, and the test results are listed in Table 2.
TABLE 1 product Performance test criteria and conditions
TABLE 2 Performance test results of examples 1-4 and comparative examples 1-2
The following conclusions were obtained by comparing the data in table 2:
the invention adopts the homopolymerized polypropylene and the copolymerized polypropylene to be compounded for use, simultaneously adds the toughening agent for toughening, greatly improves the unnotched impact strength under the requirement that the material keeps high fluidity and modulus and 1.6mmV-0 flame retardant grade, and compared with the traditional formula, the unnotched impact strength is improved by 12-16 kJ/m2Increasing the temperature to 20-30 kJ/m2Is full ofThe performance requirement of the polypropylene material for preparing the battery cover plate by the LFT-D technology is met, and the battery cover plate has wide market space for producing high-performance battery cover plates in the future.
Claims (9)
1. The polypropylene material for the battery cover plate is characterized by being prepared from the following raw materials in percentage by mass:
polypropylene: 40 to 70 percent of the total weight of the mixture,
flame retardant: 20 to 35 percent of the total weight of the mixture,
a toughening agent: 3 to 10 percent of the total weight of the mixture,
lubricant: 0.2 to 1.5 percent of,
dispersing agent: 0.5 to 3 percent of the total weight of the mixture,
antioxidant: 0.1 to 1 percent of the total weight of the mixture,
a compatilizer: 3 to 10 percent of the total weight of the mixture,
flow modifier: 0.5 to 4 percent.
2. The polypropylene material for the battery cover plate according to claim 1, wherein the polypropylene is prepared from homo-polypropylene and co-polypropylene according to a mass ratio of (0.5-1.5): 1.
3. The polypropylene material for the battery cover plate according to claim 1, wherein the flame retardant is one or a mixture of nitrogen and phosphorus intumescent flame retardants, the content of N is 14-17%, and the content of P is 23-25%.
4. The polypropylene material for a battery cover plate as claimed in claim 1, wherein the elastomer toughening agent is one or a mixture of more of polyolefin elastomer ethylene octene polymer, polyolefin thermoplastic elastomer, styrene-butadiene-styrene block copolymer, styrene-ethylene-butadiene-styrene copolymer, thermoplastic vulcanizate and ethylene propylene diene monomer.
5. The polypropylene material for battery cover plates as claimed in claim 1, wherein the antioxidant is one or a mixture of several of antioxidant 1010, antioxidant 168, antioxidant 3114 and antioxidant DLTP.
6. The polypropylene material for a battery cover plate according to claim 1, wherein the lubricant is one or a mixture of several of fatty acid, fatty acid salt, fatty amide and polyethylene wax; the dispersant is a dendriform carboxyl macromolecule; the compatilizer is polypropylene grafted maleic anhydride, wherein the grafting rate of the maleic anhydride is 1-1.5%; the flow modifier is polypropylene master batch containing peroxide.
7. The polypropylene material for a battery cover plate according to claim 1, further comprising 0.5 to 1.5% of a colorant.
8. A preparation method of the polypropylene material for the battery cover plate as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
uniformly mixing the raw materials such as the polypropylene, the toughening agent, the flame retardant, the compatilizer, the flow modifier, the antioxidant, the dispersing agent, the lubricant, the coloring agent and the like under high-speed stirring, and then feeding the mixture into a charging barrel of a double-screw extruder; the polypropylene material for the battery cover plate can be obtained by melting, blending, extruding, cooling and granulating.
9. The method for preparing a polypropylene material according to claim 8, wherein the twin-screw extruder has a screw diameter of 35mm and an aspect ratio of 40, and the temperature from the feed port to the head is 120 ℃, 180 ℃, 190 ℃, 180 ℃, 170 ℃ in this order, and the rotation speed of the main machine is 400 rpm.
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