CN115678448A - Acrylic pressure-sensitive adhesive for blue film of battery cell and resisting heat and humidity aging, and preparation method and application thereof - Google Patents
Acrylic pressure-sensitive adhesive for blue film of battery cell and resisting heat and humidity aging, and preparation method and application thereof Download PDFInfo
- Publication number
- CN115678448A CN115678448A CN202211271201.6A CN202211271201A CN115678448A CN 115678448 A CN115678448 A CN 115678448A CN 202211271201 A CN202211271201 A CN 202211271201A CN 115678448 A CN115678448 A CN 115678448A
- Authority
- CN
- China
- Prior art keywords
- parts
- sensitive adhesive
- acrylic pressure
- initiator
- blue film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 95
- 230000032683 aging Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000003999 initiator Substances 0.000 claims abstract description 35
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000002904 solvent Substances 0.000 claims abstract description 30
- 239000002390 adhesive tape Substances 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims abstract description 21
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims abstract description 13
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 12
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims abstract description 11
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims abstract description 11
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 58
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- MABAWBWRUSBLKQ-UHFFFAOYSA-N ethenyl-tri(propan-2-yloxy)silane Chemical compound CC(C)O[Si](OC(C)C)(OC(C)C)C=C MABAWBWRUSBLKQ-UHFFFAOYSA-N 0.000 claims description 5
- PJUIMOJAAPLTRJ-UHFFFAOYSA-N monothioglycerol Chemical compound OCC(O)CS PJUIMOJAAPLTRJ-UHFFFAOYSA-N 0.000 claims description 5
- -1 polyethylene terephthalate Polymers 0.000 claims description 5
- 229940035024 thioglycerol Drugs 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 4
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 2
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 11
- 230000001070 adhesive effect Effects 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000052 comparative effect Effects 0.000 description 23
- 230000008859 change Effects 0.000 description 11
- 239000011268 mixed slurry Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 10
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 9
- 229910000077 silane Inorganic materials 0.000 description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 7
- 239000004925 Acrylic resin Substances 0.000 description 6
- 229920000178 Acrylic resin Polymers 0.000 description 6
- 239000006087 Silane Coupling Agent Substances 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 230000003313 weakening effect Effects 0.000 description 4
- 229910002803 Si-O-Fe Inorganic materials 0.000 description 3
- 229910002802 Si–O–Fe Inorganic materials 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229920001400 block copolymer Polymers 0.000 description 3
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention provides an acrylic pressure-sensitive adhesive for a blue film of a battery cell and resisting heat and humidity aging, and a preparation method and application thereof, wherein the acrylic pressure-sensitive adhesive comprises the following raw materials in parts by weight: 15-25 parts of isooctyl acrylate, 50-60 parts of n-butyl acrylate, 6-10 parts of hydroxypropyl acrylate and/or hydroxyethyl acrylate, 2-5 parts of methacrylic acid, 5-10 parts of acrylic acid, 0.5-2 parts of vinyl silane, 2-10 parts of vinyl acetate, 0.1-0.4 part of chain transfer agent, 0.25-0.5 part of initiator and 20-40 parts of solvent. The acrylic pressure-sensitive adhesive provided by the invention is matched with a certain curing agent and color paste to prepare the battery cell blue film adhesive tape which is pasted on a square aluminum shell battery cell, the edge break angle can be kept for at least 240h without warping, the peeling force climbs to be lower than 40% after the aging is carried out at 85 ℃,85 ℃ and 500h, no adhesive residue is generated, and the aging resistance is excellent.
Description
Technical Field
The invention belongs to the technical field of pressure-sensitive adhesives, and relates to an acrylic pressure-sensitive adhesive for a battery cell blue film and resistance to heat and humidity aging, and a preparation method and application thereof.
Background
Currently, with the rapid popularization of new energy automobiles and the continuous expansion of the scale of the power battery industry, the production standard, quality and safety control of lithium batteries are becoming strict and mature. The blue film is used as an important process in the production process of the lithium battery cell, plays a role in protecting and insulating the cell, and improves the performance requirement of the blue film. At present, besides the requirement of meeting the traditional requirements of anti-warping performance, peeling force, initial adhesion, permanent adhesion and the like, the blue film also has the aging resistance in the high-temperature and high-humidity environment, and the change of the peeling force before and after aging is required to be less than 40%.
In a high-humidity environment, water vapor can weaken the adhesive bonding interface, so that the bonding force of the interface is weakened. Under the condition of high temperature and high humidity, the post-curing reinforcing effect of high temperature on the adhesive and the weakening effect of high humidity on the bonding interface exist at the same time, and the reinforcing effect is usually far greater than the weakening effect. In order to simulate the working environment of the battery cell, a high-temperature and high-humidity aging test is adopted to detect the peeling force change condition of the blue film of the battery cell. After the existing battery cell blue film is subjected to high-temperature and high-humidity aging test, the stripping force can be greatly improved, even improved by more than 100%, the problems of adhesive residue and the like are accompanied, and the current performance requirement on the blue film is not met.
Therefore, in the field, the development of an acrylic pressure-sensitive adhesive for a blue film of a battery cell and resisting heat and humidity aging is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an acrylic pressure-sensitive adhesive for a blue film of a battery core and resisting heat and humidity aging, and a preparation method and application thereof. The acrylic pressure-sensitive adhesive provided by the invention is matched with a certain curing agent and color paste to prepare a battery cell blue film adhesive tape which is stuck on a square aluminum shell battery cell, can keep the edge break angle for at least 240h not to warp, has the peeling force climbing lower than 40 percent after being aged at 85 ℃,85 ℃ RH and 500h, preferably lower than 30 percent, does not generate residual adhesive, has excellent aging resistance and simple and easy production process, and can be applied to the battery cell blue film of a new energy battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an acrylic pressure-sensitive adhesive for a battery cell blue film and resistance to heat and humidity aging, which comprises the following raw materials in parts by weight: 15-25 parts of isooctyl acrylate, 50-60 parts of n-butyl acrylate, 6-10 parts of hydroxypropyl acrylate and/or hydroxyethyl acrylate, 2-5 parts of methacrylic acid, 5-10 parts of acrylic acid, 0.5-2 parts of vinyl silane, 2-10 parts of vinyl acetate, 0.1-0.4 part of chain transfer agent, 0.25-0.5 part of initiator and 20-40 parts of solvent.
According to the invention, by selecting specific raw materials and controlling the content of each component, the prepared acrylic pressure-sensitive adhesive has the advantages of resistance to heat and humidity aging, and can keep the stripping force stable and small in change.
In the invention, the amount of isooctyl acrylate in the raw materials for preparing the acrylic pressure-sensitive adhesive can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts or 25 parts.
In the present invention, in the raw material for preparing the acrylic pressure-sensitive adhesive, the n-butyl acrylate may be used in an amount of 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, 60 parts, or the like.
In the present invention, in the raw material for preparing the acrylic pressure sensitive adhesive, the hydroxypropyl acrylate and/or hydroxyethyl acrylate may be used in an amount of 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, or the like.
In the invention, in the raw material for preparing the acrylic pressure-sensitive adhesive, the amount of the methacrylic acid used can be 2 parts, 3 parts, 4 parts or 5 parts.
In the present invention, the amount of acrylic acid used in the raw materials for preparing the acrylic pressure-sensitive adhesive may be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, or the like.
In the present invention, in the raw material for preparing the acrylic pressure-sensitive adhesive, the vinyl silane may be used in an amount of 0.5 parts, 1 part, 1.5 parts, 2 parts, or the like.
In the present invention, the amount of vinyl acetate used in the raw materials for preparing the acrylic pressure-sensitive adhesive may be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, or the like.
In the present invention, in the raw material for preparing the acrylic pressure sensitive adhesive, the amount of the chain transfer agent may be 0.1 part, 0.2 part, 0.3 part, 0.4 part, or the like.
In the present invention, in the raw material for preparing the acrylic pressure-sensitive adhesive, the amount of the initiator may be 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, or the like.
In the present invention, in the raw material for preparing the acrylic pressure-sensitive adhesive, the solvent may be used in an amount of 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, or the like.
Preferably, the preparation raw materials of the acrylic pressure-sensitive adhesive comprise the following components in parts by weight: 15-20 parts of isooctyl acrylate, 52-58 parts of n-butyl acrylate, 7-9 parts of hydroxypropyl acrylate and/or hydroxyethyl acrylate, 3-5 parts of methacrylic acid, 6-8 parts of acrylic acid, 1-1.5 parts of vinyl silane, 4-8 parts of vinyl acetate, 0.15-0.3 part of chain transfer agent, 0.3-0.4 part of initiator and 20-40 parts of solvent.
Preferably, the vinyl silane comprises any one of vinyl triisopropoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, or vinyl tris (beta-methoxyethoxy) silane, or a combination of at least two thereof, preferably vinyl triisopropoxysilane and/or vinyl tris (beta-methoxyethoxy) silane.
Preferably, the chain transfer agent comprises a thiol compound such as thioglycerol and/or mercaptoethanol.
Preferably, the initiator comprises azobisisobutyronitrile.
Preferably, the solvent comprises ethyl acetate.
In a second aspect, the present invention provides a method for preparing the acrylic pressure-sensitive adhesive of the first aspect, the method comprising the steps of:
a) Adding a solvent into a reactor, and preheating;
b) Mixing isooctyl acrylate, n-butyl acrylate, hydroxypropyl acrylate and/or hydroxyethyl acrylate, methacrylic acid, acrylic acid, a chain transfer agent and a part of initiator according to the formula ratio to obtain a mixture, adding the mixture into the preheated solvent in the step a), and reacting;
c) Continuously adding part of initiator for reaction;
d) Continuously adding vinyl silane for reaction;
e) Continuously adding the rest of initiator and vinyl acetate for reaction;
f) And cooling to obtain the acrylic pressure-sensitive adhesive.
In the present invention, in step b), various monomers react to form acrylate, and the vinyl silane and the acrylate form a block copolymer having the following chemical structure:
wherein R, R 'and R' each represent a different alkyl group.
Silane has the characteristics of high temperature resistance, oxidation resistance, low surface energy, good flexibility and the like, and is a great hotspot for research in the field of functional materials all the time. The invention adopts vinyl silane, and introduces the silane into a polyacrylate molecular chain through the copolymerization of C = C and acrylate, and the silane is tightly combined in a covalent bond form. In a high-temperature and high-humidity environment, silane can migrate to the surface with more water to generate hydrolysis reaction to generate silanol substances, and then the silanol substances and-OH on the surface of the tin (or aluminum) (the material of the electric core is generally steel or aluminum) are subjected to dehydration condensation reaction to form Si-O-Fe (Al) chemical bonds, so that the high-temperature aging resistance of the acrylic pressure-sensitive adhesive can be improved. Part of unreacted silanol has hydrophobic effect, and hydrogen atoms on-OH and oxygen atoms on the surface of the tin (or aluminum) form intermolecular hydrogen bonds, so that the hydrophobicity can be further improved, and the weakening effect of water vapor on a bonding interface can be reduced. Therefore, the block copolymer formed by vinyl silane and acrylate has the advantage of resisting wet heat aging, and can keep the peeling force stable and has small change. The action mechanism is as follows:
however, as the amount of silane used increases, the opposite effect occurs. On one hand, a network structure is formed between the silane coupling agent and the acrylic resin, and a mutual permeation potential is formed, so that the adhesive force of the polymer becomes larger; on the other hand, excessive silane coupling agent may self-polymerize to form local cross-linking, affecting the flexibility of the acrylic resin of the main body, and further leading to the decrease of the anti-warping property. Therefore, the silane coupling agent as a monomer should be added in an appropriate range not to be excessively used.
Preferably, said preheating of step a) is carried out under an inert atmosphere.
Preferably, the inert atmosphere comprises nitrogen.
Preferably, the preheating temperature in step a) is 70-75 deg.C, such as 70 deg.C, 71 deg.C, 72 deg.C, 73 deg.C, 74 deg.C or 75 deg.C, etc., and the preheating time is 30-40min, such as 30min, 33min, 35min, 38min or 40min, etc.
Preferably, the portion of initiator of step b) is 1/4 of the total amount of initiator.
Preferably, the step b) of adding the mixed material into the preheated solvent in the step a) specifically comprises the following steps: dropwise adding the mixture into the preheated solvent in the step a) at constant speed within 1.5-2h (such as 1.5h, 1.8h or 2 h), and keeping the reaction temperature at 78-82 deg.C, such as 78 deg.C, 79 deg.C, 80 deg.C, 81 deg.C or 82 deg.C.
Preferably, the reaction in step b) is carried out at a temperature of 78-82 ℃, such as 78 ℃, 79 ℃, 80 ℃, 81 ℃ or 82 ℃ and the like, for a time of 0.5-1.5h, such as 0.5h, 0.8h, 1h, 1.2h or 1.5h and the like.
Preferably, the portion of initiator of step c) is 1/4 of the total amount of initiator.
Preferably, the reaction in step c) is carried out at a temperature of 80-82 ℃, such as 80 ℃, 81 ℃ or 82 ℃ and the like, for a time of 0.5-1.5h, such as 0.5h, 0.8h, 1h, 1.2h or 1.5h and the like.
Preferably, the reaction of step d) is carried out at a temperature of 80-82 ℃, such as 80 ℃, 81 ℃ or 82 ℃ and the like, for a time of 1.5-2h, such as 1.5h, 1.8h or 2h and the like.
Preferably, the reaction in step e) is carried out at a temperature of 82-84 ℃, such as 82 ℃, 83 ℃ or 84 ℃ and the like, for a reaction time of 1.5-2h, such as 1.5h, 1.8h or 2h and the like.
Preferably, the temperature reduction in step f) is to be reduced to 50-55 ℃, such as 50 ℃, 51 ℃, 52 ℃, 53 ℃, 54 ℃ or 55 ℃ and the like.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
a) Adding a solvent to the reactor under N 2 Preheating for 30-40min at 70-75 deg.C in atmosphere;
b) Mixing isooctyl acrylate, n-butyl acrylate, hydroxypropyl acrylate and/or hydroxyethyl acrylate, methacrylic acid, acrylic acid, a chain transfer agent and a part of initiator according to the formula ratio to obtain a mixture, dropwise adding the mixture into the preheated solvent in the step a) at a constant speed within 1.5-2h, keeping the reaction temperature at 78-82 ℃, and continuing to react at 78-82 ℃ for 0.5-1.5h after dropwise adding; wherein, part of the initiator is 1/4 of the total amount of the initiator;
c) Continuously adding part of initiator, and reacting for 0.5-1.5h at 80-82 ℃; wherein, part of the initiator accounts for 1/4 of the total amount of the initiator;
d) Continuously adding vinyl silane, and reacting for 1.5-2h at 80-82 ℃;
e) Continuously adding the rest initiator and vinyl acetate, and reacting at 82-84 ℃ for 1.5-2h;
f) And cooling to 50-55 ℃, and discharging to obtain the acrylic pressure-sensitive adhesive.
In a third aspect, the invention provides a wet-heat aging resistant battery cell blue film adhesive tape, which comprises a release film layer, a first acrylic acid pressure-sensitive adhesive layer, a first substrate layer, a second acrylic acid pressure-sensitive adhesive layer and a second substrate layer which are sequentially stacked;
the preparation raw materials of the first acrylic acid pressure-sensitive adhesive layer and the second acrylic acid pressure-sensitive adhesive layer both comprise: the acrylic pressure-sensitive adhesive, the curing agent and the blue film color paste as described in the first aspect.
Namely, the battery cell blue film adhesive tape of the present application has a double-layer structure. It should be noted that, the thicknesses of the release film layer, the first acrylic acid pressure-sensitive adhesive layer, the first substrate layer, the second acrylic acid pressure-sensitive adhesive layer and the second substrate layer in the battery cell blue-film adhesive tape are not particularly limited, and can be adjusted according to customer requirements.
Preferably, the material of the first substrate layer and the material of the second substrate layer both comprise polyethylene terephthalate (PET).
Preferably, the mass ratio of the acrylic pressure-sensitive adhesive, the curing agent and the blue film color paste is 100 (0.8-1.2): 3-8, such as 100.
Preferably, the curing agent comprises an isocyanate-based curing agent.
Preferably, the raw materials for preparing the first acrylic pressure-sensitive adhesive layer and the second acrylic pressure-sensitive adhesive layer further comprise a solvent.
Preferably, the solvent comprises ethyl acetate.
It should be noted that, the preparation method of the battery cell blue film adhesive tape is not particularly limited, and for example, the battery cell blue film adhesive tape can be prepared by the following method:
(1) Mixing acrylic acid pressure-sensitive adhesive, a curing agent, blue film color paste and an optional solvent to obtain first mixed slurry, coating the first mixed slurry on one surface of a first substrate layer by using a scraper to form a first acrylic acid pressure-sensitive adhesive layer, and then attaching a release film to one surface, far away from the first substrate layer, of the first acrylic acid pressure-sensitive adhesive layer to obtain a semi-finished product;
(2) And (2) mixing the acrylic acid pressure-sensitive adhesive, the curing agent, the blue film color paste and an optional solvent to obtain second mixed slurry, coating the second mixed slurry on one surface of a second substrate layer by using a scraper to form a second acrylic acid pressure-sensitive adhesive layer, then laminating the second acrylic acid pressure-sensitive adhesive layer with the semi-finished product obtained in the step (1), and curing to obtain the battery cell blue film adhesive tape, wherein the first substrate layer and the second acrylic acid pressure-sensitive adhesive layer are adjacently arranged.
Preferably, the curing is baking at 70-90 deg.C (e.g., 70 deg.C, 75 deg.C, 80 deg.C, 85 deg.C, or 90 deg.C, etc.) for 3-8min (e.g., 3min, 5min, or 8min, etc.), and then aging at 45-55 deg.C (e.g., 45 deg.C, 48 deg.C, 50 deg.C, 53 deg.C, or 55 deg.C, etc.) for 70-80h (e.g., 70h, 72h, 74h, 76h, 78h, or 80h, etc.).
Compared with the prior art, the invention has the following beneficial effects:
(1) The method adopts vinyl silane, and introduces the silane into a polyacrylate molecular chain through copolymerization of C = C and acrylate, and the silane is tightly combined in a covalent bond form. In a high-temperature and high-humidity environment, silane can migrate to the surface with more water to generate a hydrolysis reaction to generate silanol substances, and then the silanol substances and-OH on the surface of the tin (or aluminum) are subjected to a dehydration condensation reaction to form a chemical bond of Si-O-Fe (Al), so that the high-temperature aging resistance of the acrylic pressure-sensitive adhesive can be improved. Meanwhile, because of the existence of the chemical bond of Si-O-Fe (Al), the pressure-sensitive adhesive is not easy to generate cohesive failure at high temperature, and after aging, the pressure-sensitive adhesive is peeled from a metal plate without residual adhesive or ghost.
(2) After silane is hydrolyzed, part of unreacted silanol has a hydrophobic effect, and hydrogen atoms on-OH and oxygen atoms on the surface of the tin plate form intermolecular hydrogen bonds, so that the hydrophobicity can be further improved, and the weakening effect of water vapor on a bonding interface is relieved. Therefore, the block copolymer formed by vinyl silane and acrylate has the advantage of resisting wet heat aging, and can keep the peeling force stable and has small change.
(3) The acrylic pressure-sensitive adhesive provided by the invention is matched with a certain curing agent and color paste to prepare the cell blue film adhesive tape, the cell blue film adhesive tape is pasted on a square aluminum shell cell, the edge break angle can be kept for at least 240h without warping, the peeling force climbs to be lower than 40% after the cell blue film adhesive tape is aged for 85 ℃,85 ℃ RH and 500h, no residual adhesive appears, the aging resistance is excellent, the production process is convenient and easy to implement, and the current use requirement on the new energy cell blue film can be met.
Drawings
FIG. 1 is an infrared spectrum of an acrylic pressure-sensitive adhesive provided in example 1 of the present invention.
Detailed Description
The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitation of the present invention.
The raw material information used in the examples and comparative examples of the present invention is as follows:
isooctyl acrylate, n-butyl acrylate, hydroxypropyl acrylate, methacrylic acid, acrylic acid, vinyl acetate, purchased from bard rich industries ltd, analytically pure;
vinyl triisopropoxysilane, available from Canoe (Buddha) chemical materials, inc., type AC-76;
vinyltriethoxysilane, type KH151, available from Sandong Yuan jin New materials Co., ltd;
vinyltris (. Beta. -methoxyethoxy) silane, model ZQ-172, available from Hubei Yankee Sci Ltd;
the initiator is azobisisobutyronitrile, the chain transfer agent is thioglycerol, and the initiator is purchased from Aladdin reagent (Shanghai) Co., ltd and is analytically pure;
ethyl acetate, sigma aldrich (shanghai) trade ltd, analytically pure;
a curing agent, available from Corsai Polymer (China) Inc. under the model number Desmodur L75;
color paste, available from Hangzhou Zhongcai New Material science and technology, type JQ1313.
Examples 1 to 6
In examples 1 to 6, an acrylic pressure-sensitive adhesive for a blue film of a battery cell and resistance to wet heat aging is provided, and the raw materials for preparing the acrylic pressure-sensitive adhesive are shown in table 1 in terms of parts by weight.
TABLE 1
In table 1, "/" indicates that the corresponding raw material was not added.
The preparation method comprises the following steps:
a) The solvent ethyl acetate was added to a four-necked flask in N 2 Preheating for 30min at 75 ℃ in atmosphere;
b) Uniformly mixing isooctyl acrylate, n-butyl acrylate, hydroxypropyl acrylate, methacrylic acid, acrylic acid, a chain transfer agent (thioglycerol) and part of initiator (1/4 of the total amount of the initiator, azodiisobutyronitrile) according to the formula ratio to obtain a mixture, dropwise adding the mixture into the preheated solvent obtained in the step a) at a constant speed within 2h, keeping the reaction temperature at 80 ℃, and continuously reacting at 80 ℃ for 1h after dropwise adding;
c) Continuously adding part of initiator (1/4 of the total amount of the initiator, azodiisobutyronitrile) and reacting for 1 hour at 80 ℃;
d) Continuously adding vinyl silane, and reacting for 2h at 80 ℃;
e) Continuously adding the rest initiator and vinyl acetate, and reacting for 1.5h at 84 ℃;
f) And cooling to 50 ℃, and discharging to obtain the acrylic pressure-sensitive adhesive.
The infrared spectrogram of the acrylic pressure-sensitive adhesive provided by the embodiment 1 of the invention is shown in figure 1, and can be seen to be 1728cm -1 The peak is the characteristic peak of acrylic acid and methacrylic acid carbonyl at 1640cm -1 Has no characteristic peak of C = C, and 1117cm -1 The stretching vibration peak of the Si-O bond indicates that all C = C of the vinyl silane participates in the reaction and the chemical bond of Si-O-C is generated by copolymerization, which indicates that the vinyl silane and the acrylate form a copolymer.
Comparative examples 1 to 5
In comparative examples 1 to 5, an acrylic pressure-sensitive adhesive for a blue film of a battery cell is provided, wherein the raw materials for preparing the acrylic pressure-sensitive adhesive are shown in table 2 in terms of parts by weight.
TABLE 2
| Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | |
| Acrylic |
20 | 20 | 20 | 20 | 20 |
| Acrylic acid n-butyl ester | 55 | 55 | 55 | 55 | 55 |
| Hydroxypropyl acrylate | 8 | 8 | 8 | 8 | 8 |
| Methacrylic acid (MAA) | 4 | 4 | 4 | 4 | 4 |
| Acrylic acid | 7 | 7 | 7 | 7 | 7 |
| Thioglycerol | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
| Azobisisobutyronitrile | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 |
| Vinyl triisopropoxysilane | 0 | 3 | 5 | 1 | 1 |
| Vinyl acetate ester | 6 | 6 | 6 | 0 | 13 |
| |
30 | 30 | 30 | 30 | 30 |
The preparation method is the same as the embodiment.
Application examples 1-6 and comparative application examples 1-5
In application examples 1 to 6, a battery cell blue film adhesive tape is provided, which includes a release film layer (with a thickness of 30 μm), a first acrylic pressure-sensitive adhesive layer (with a thickness of 30 μm), a first substrate layer (with a thickness of 25 μm), a second acrylic pressure-sensitive adhesive layer (with a thickness of 19 μm), and a second substrate layer (with a thickness of 36 μm) stacked in sequence;
the preparation raw materials of the first acrylic acid pressure-sensitive adhesive layer and the second acrylic acid pressure-sensitive adhesive layer comprise the following components in parts by weight: 100 parts of acrylic pressure-sensitive adhesive (provided by examples 1-6 and comparative examples 1-5 respectively), 1 part of curing agent (Desmodur L75), 5 parts of blue film color paste (JQ 1313) and 200 parts of solvent (ethyl acetate);
the first base material layer and the second base material layer are both made of PET.
The preparation method comprises the following steps:
(1) Mixing the acrylic pressure-sensitive adhesive, the curing agent, the blue film color paste and the solvent according to the formula ratio to obtain first mixed slurry, coating the first mixed slurry on one surface of a first substrate layer by using a scraper to form a first acrylic pressure-sensitive adhesive layer, and then attaching a release film to one surface, far away from the first substrate layer, of the first acrylic pressure-sensitive adhesive layer to obtain a semi-finished product;
(2) And (2) mixing the acrylic pressure-sensitive adhesive, the curing agent, the blue film color paste and the solvent according to the formula ratio to obtain second mixed slurry, coating the second mixed slurry on one surface of a second base material layer by using a scraper to form a second acrylic pressure-sensitive adhesive layer, then attaching the second mixed slurry to the semi-finished product obtained in the step (1), baking the second mixed slurry at 80 ℃ for 5min, and then curing the second mixed slurry at 50 ℃ for 72h to obtain the battery cell blue film adhesive tape, wherein the first base material layer and the second acrylic pressure-sensitive adhesive layer are adjacently arranged.
Comparative application example 6
The difference between the comparative application example and the application example 1 is only that the preparation raw materials of the first acrylic pressure-sensitive adhesive layer and the second acrylic pressure-sensitive adhesive layer comprise the following components in parts by weight: 100 parts of acrylic pressure-sensitive adhesive, 0.6 part of curing agent (Desmodur L75), 5 parts of blue film color paste (JQ 1313) and 200 parts of solvent (ethyl acetate).
Comparative application example 7
The difference between the comparative application example and the application example 1 is only that the preparation raw materials of the first acrylic pressure-sensitive adhesive layer and the second acrylic pressure-sensitive adhesive layer comprise the following components in parts by weight: 100 parts of acrylic pressure-sensitive adhesive, 1.5 parts of curing agent (Desmodur L75), 5 parts of blue film color paste (JQ 1313) and 200 parts of solvent (ethyl acetate).
The performance test is carried out on the battery cell blue film adhesive tapes provided in the application examples 1-6 and the comparative application examples 1-7, and the test method is as follows:
(1) 180 ° peel force: measured according to GB/T2792-1998 (peeling speed 300 mm/min);
(2) Initial adhesion: the determination is carried out according to the GB/T4852-2002 standard, and the requirements are as follows: initial viscosity rolling ball >9#;
(3) Permanent adhesion: measured according to GB/T4851-1998 standard (80 ℃);
(4) Tape thickness (excluding release film): after drying, the thickness of the adhesive tape is (110 +/-2) mu m;
(5) Anti-warping property: the method comprises the following steps of (1) attaching a blue film adhesive tape to the periphery of a square aluminum shell battery cell, wherein the attaching width of a bevel edge is about 5mm, checking the adhesive tape for 1 time every 24 hours, checking whether the bevel edge is warped or not, and recording the time when the bevel edge of the adhesive tape is warped;
(6) Resistance to wet heat aging: according to GB/T2792-1998 standard, a blue-film adhesive tape is adhered to an Al plate, and is repeatedly pressed for 3 times, left to stand for 2 hours, left to stand for 500 hours in an environment of 85 ℃,85% RH, left to stand for 24 hours after being taken out, and then tested for 180 DEG peel force, which is required: the peel force change rate before and after the test on the Al plate is less than 40%, and adhesive residue can not appear, and at least 3 samples are tested in each formula.
The results of the performance tests are shown in table 3.
TABLE 3
As can be seen from table 3, the cell blue film tapes provided in application examples 1 to 6 all have a 180 ° peel force of 12.1 to 16.3N/25mm, and a moderate peel force, and are suitable for most of the cell blue film lamination processes, and the initial adhesion, the permanent adhesion, and the anti-warping property thereof are acceptable, and after aging at 85 ℃,85 ℃ rh, and 500 hours, there is no residual adhesive, and the change rate of the peel force is less than 40%, wherein the cell blue film tapes provided in application examples 1 and 3 have a peel force change rate of less than 30%, excellent moisture and heat aging resistance, and comprehensive properties satisfying the current performance requirements for the cell blue film.
As can be seen from Table 3, in comparative application example 1, since the acrylic pressure-sensitive adhesive is not added with the vinyl silane coupling agent and belongs to pure acrylic resin, the prepared adhesive tape has poor resistance to heat and humidity aging, the peeling force rises to more than 85% after aging, and the adhesive tape is accompanied by adhesive residue and is not qualified.
In comparative application examples 2 and 3, the vinyl silane coupling agent added to the acrylic pressure-sensitive adhesive is too much, which, on one hand, can cause the surface tension of the adhesive tape to be reduced, and further, can reduce the peeling force thereof; on the other hand, the phenomenon of self-polymerization of the silane coupling agent is increased, partial cross-linking is formed, the combination with the main acrylic resin is not tight, the flexibility of the acrylic resin is influenced, and the anti-warping performance and the damp-heat aging resistance of the adhesive tape are reduced. Therefore, the raising time is shorter, namely 192h and 120h, respectively, the change rate of the peeling force after aging is 48.5 percent and 62.3 percent, and the climbing speed of the peeling force is higher and is unqualified.
In comparative application examples 4 and 5, the dosage of the functional monomer vinyl acetate in the acrylic pressure-sensitive adhesive is changed, and the polar group-OH is introduced into the acrylic pressure-sensitive adhesive system, so that the interaction between the polar group and the adhered surface can be enhanced, and the adhesion condition between the pressure-sensitive adhesive and the adhered surface can be improved. In comparative application example 4, the acrylic pressure-sensitive adhesive does not contain vinyl acetate, so that the peeling force of the adhesive tape at normal temperature is relatively low, 8.5N/25mm, and the anti-warping performance of the adhesive tape is not qualified. Similarly, in comparative application example 5, the amount of vinyl acetate used in the acrylic pressure sensitive adhesive was too large, so that the peel strength of the adhesive tape was too high, 18.2N/25mm, and the other properties were almost acceptable. Since a proper amount of vinyl silane is added into the acrylic pressure-sensitive adhesives of comparative application examples 4 and 5, the acrylic pressure-sensitive adhesives have good aging resistance and are close to pass.
In comparative application examples 6 and 7, the crosslinking density of the system was changed and the cohesion was affected by changing the amount of the curing agent. Wherein, the curing agent dosage used in comparative application example 6 is less, resulting in insufficient crosslinking density, small cohesive force, poor permanent viscous force, adhesive tape can appear the cull after ageing, the peel strength climbs soon, unqualified. Compared with the curing agent used in application example 7, the curing agent used in the method has a large amount, so that the crosslinking density of the system is high, most of functional groups of the acrylic resin, such as-OH, are reacted, and the adhesive film is hard, the anti-warping performance is greatly reduced, and the stripping force is reduced. But the crosslinking density is high, so that the system cohesion is high, and the damp-heat aging resistance is enhanced.
In summary, the cell blue film tapes provided in application examples 1 to 6 have acceptable 180 ° peel force, initial adhesion, permanent adhesion, and anti-warping properties, and after aging at 85 ℃ and 85% rh for 500h, no residual adhesive remains, and the rate of change of peel force is less than 40%, wherein the cell blue film tapes provided in application examples 1 and 3 have a peel force rate of change of less than 30%, are more excellent in resistance to wet and heat aging, and the comprehensive properties meet the current performance requirements for the cell blue film.
The applicant states that the acrylic pressure-sensitive adhesive for the blue film of the battery cell and the resistance to wet heat aging and the preparation method and application thereof are described by the above embodiments, but the invention is not limited to the above embodiments, that is, the invention is not limited to the above embodiments. It will be apparent to those skilled in the art that any modifications to the present invention, equivalent substitutions of selected materials and additions of auxiliary components, selection of specific forms, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The acrylic pressure-sensitive adhesive for the blue film of the battery core and the resistance to heat and aging is characterized by comprising the following raw materials in parts by weight: 15-25 parts of isooctyl acrylate, 50-60 parts of n-butyl acrylate, 6-10 parts of hydroxypropyl acrylate and/or hydroxyethyl acrylate, 2-5 parts of methacrylic acid, 5-10 parts of acrylic acid, 0.5-2 parts of vinyl silane, 2-10 parts of vinyl acetate, 0.1-0.4 part of chain transfer agent, 0.25-0.5 part of initiator and 20-40 parts of solvent.
2. The acrylic pressure sensitive adhesive of claim 1 wherein the vinyl silane comprises any one of vinyl triisopropoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, or vinyl tris (β -methoxyethoxy) silane, or combinations of at least two thereof.
3. The acrylic pressure sensitive adhesive of claim 1 or 2 wherein the chain transfer agent comprises thioglycerol and/or mercaptoethanol;
preferably, the initiator comprises azobisisobutyronitrile;
preferably, the solvent comprises ethyl acetate.
4. A method for preparing the acrylic pressure sensitive adhesive according to any one of claims 1 to 3, comprising the steps of:
a) Adding a solvent into a reactor, and preheating;
b) Mixing isooctyl acrylate, n-butyl acrylate, hydroxypropyl acrylate and/or hydroxyethyl acrylate, methacrylic acid, acrylic acid, a chain transfer agent and a part of initiator according to the formula ratio to obtain a mixture, adding the mixture into the preheated solvent in the step a), and reacting;
c) Continuously adding part of initiator for reaction;
d) Continuously adding vinyl silane for reaction;
e) Continuously adding the rest of initiator and vinyl acetate for reaction;
f) And cooling to obtain the acrylic pressure-sensitive adhesive.
5. The method according to claim 4, wherein the preheating temperature in step a) is 70-75 ℃, and the preheating time is 30-40min;
preferably, the portion of initiator of step b) is 1/4 of the total amount of initiator;
preferably, the step b) of adding the mixture into the preheated solvent in the step a) specifically comprises the following steps: dropwise adding the mixture into the preheated solvent in the step a) at a constant speed within 1.5-2h, and keeping the reaction temperature at 78-82 ℃;
preferably, the reaction temperature of the step b) is 78-82 ℃, and the reaction time is 0.5-1.5h.
6. The method according to claim 4 or 5, wherein the portion of the initiator in step c) is 1/4 of the total amount of the initiator;
preferably, the reaction temperature in the step c) is 80-82 ℃, and the reaction time is 0.5-1.5h;
preferably, the reaction temperature of the step d) is 80-82 ℃, and the reaction time is 1.5-2h.
7. The process according to any one of claims 4 to 6, wherein the reaction in step e) is carried out at a temperature of from 82 to 84 ℃ for a time of from 1.5 to 2 hours;
preferably, the temperature reduction in the step f) is to be reduced to 50-55 ℃.
8. The electric core blue film adhesive tape is characterized by comprising a release film layer, a first acrylic acid pressure-sensitive adhesive layer, a first base material layer, a second acrylic acid pressure-sensitive adhesive layer and a second base material layer which are sequentially stacked;
the preparation raw materials of the first acrylic acid pressure-sensitive adhesive layer and the second acrylic acid pressure-sensitive adhesive layer both comprise: the acrylic pressure sensitive adhesive, the curing agent and the blue film color paste according to any one of claims 1 to 3;
preferably, the first substrate layer and the second substrate layer are both made of polyethylene terephthalate.
9. The battery cell blue film adhesive tape of claim 8, wherein the mass ratio of the acrylic pressure sensitive adhesive, the curing agent and the blue film color paste is 100 (0.8-1.2) to (3-8).
10. The cell blue film tape according to claim 8 or 9, wherein the raw materials for preparing the first acrylic pressure-sensitive adhesive layer and the second acrylic pressure-sensitive adhesive layer further comprise a solvent;
preferably, the solvent comprises ethyl acetate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211271201.6A CN115678448B (en) | 2022-10-17 | 2022-10-17 | Acrylic acid pressure-sensitive adhesive for cell blue film and humidity and heat aging resistance, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211271201.6A CN115678448B (en) | 2022-10-17 | 2022-10-17 | Acrylic acid pressure-sensitive adhesive for cell blue film and humidity and heat aging resistance, and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115678448A true CN115678448A (en) | 2023-02-03 |
| CN115678448B CN115678448B (en) | 2023-11-03 |
Family
ID=85066376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211271201.6A Active CN115678448B (en) | 2022-10-17 | 2022-10-17 | Acrylic acid pressure-sensitive adhesive for cell blue film and humidity and heat aging resistance, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115678448B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952105A (en) * | 2014-03-28 | 2014-07-30 | 广东达美新材料有限公司 | Fluorosilicone modified aqueous pressure-sensitive adhesive used for polyethylene protection film, and preparation method thereof |
| CN106520032A (en) * | 2016-10-18 | 2017-03-22 | 无锡海特新材料研究院有限公司 | High-temperature-resistant and low-peel-strength acrylate pressure-sensitive adhesive and preparation method thereof |
| CN111961414A (en) * | 2020-08-12 | 2020-11-20 | 芜湖徽氏新材料科技有限公司 | Preparation method of substrate-free anisotropic double-sided adhesive tape |
| CN112126385A (en) * | 2020-09-30 | 2020-12-25 | 东莞市骏青电子科技有限公司 | Acrylate pressure-sensitive adhesive and adhesive tape for protecting lithium battery electrode material in processing process and preparation method thereof |
| CN115160960A (en) * | 2022-08-08 | 2022-10-11 | 苏州赛伍应用技术股份有限公司 | High-solid low-viscosity acrylic polymer and preparation method and application thereof |
-
2022
- 2022-10-17 CN CN202211271201.6A patent/CN115678448B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952105A (en) * | 2014-03-28 | 2014-07-30 | 广东达美新材料有限公司 | Fluorosilicone modified aqueous pressure-sensitive adhesive used for polyethylene protection film, and preparation method thereof |
| CN106520032A (en) * | 2016-10-18 | 2017-03-22 | 无锡海特新材料研究院有限公司 | High-temperature-resistant and low-peel-strength acrylate pressure-sensitive adhesive and preparation method thereof |
| CN111961414A (en) * | 2020-08-12 | 2020-11-20 | 芜湖徽氏新材料科技有限公司 | Preparation method of substrate-free anisotropic double-sided adhesive tape |
| CN112126385A (en) * | 2020-09-30 | 2020-12-25 | 东莞市骏青电子科技有限公司 | Acrylate pressure-sensitive adhesive and adhesive tape for protecting lithium battery electrode material in processing process and preparation method thereof |
| CN115160960A (en) * | 2022-08-08 | 2022-10-11 | 苏州赛伍应用技术股份有限公司 | High-solid low-viscosity acrylic polymer and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115678448B (en) | 2023-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103911088B (en) | A kind of acrylate pressure-sensitive adhesive band and preparation method thereof and lithium ion battery | |
| CN114057929B (en) | Voltage-resistant electrolyte-resistant termination tape and copolymer for same | |
| CN102816536A (en) | Adhesive tape used for solar cell assembly and preparation method thereof | |
| CN116554797B (en) | Composite adhesive tape for lithium battery and preparation method thereof | |
| CN113913134B (en) | Adhesive for battery cell protective film, protective film prepared from adhesive and application of protective film | |
| CN113122161A (en) | Composite hot-melt double-sided adhesive tape for lithium ion battery and preparation method thereof | |
| US20210139750A1 (en) | Electrically conductive adhesive for attaching solar cells | |
| CN115678448A (en) | Acrylic pressure-sensitive adhesive for blue film of battery cell and resisting heat and humidity aging, and preparation method and application thereof | |
| CN109385235B (en) | Electrolyte-resistant adhesive for lithium battery, preparation method of electrolyte-resistant adhesive and adhesive tape for lithium battery | |
| JP2013117021A (en) | Easy adhesive agent for solar cell back-surface protectiv sheet, solar cell back-surface protectiv sheet, and solar cell module | |
| CN115141584B (en) | Acrylic pressure-sensitive adhesive for TPU automobile protective film, and preparation method and application method thereof | |
| CN113736323B (en) | White photovoltaic backboard coating composition for EVA and preparation method thereof | |
| TWI779030B (en) | Electrically conductive adhesive for attaching solar cells and uses thereof | |
| CN113480688A (en) | Solvent type acrylic resin and application thereof in battery wrapping pressure-sensitive adhesive tape | |
| CN116179124A (en) | POSS modified acrylic acid adhesive, preparation method thereof and application thereof in cell blue film | |
| CN117535021A (en) | Electrolyte-resistant acrylate adhesive and preparation method and application thereof | |
| CN117343671A (en) | Protective blue film pressure-sensitive adhesive for power battery, and preparation method and application thereof | |
| CN117089014B (en) | Acrylate copolymer, adhesive and protective film | |
| CN114752013B (en) | Preparation method of high-temperature-resistant acrylic foam adhesive tape | |
| CN109370488B (en) | Special anti-warping adhesive for lithium battery, preparation method and anti-warping tab adhesive tape | |
| CN115717053B (en) | High-initial-adhesion corrosion-resistant kneading insulating tape, adhesive and preparation method thereof | |
| EP4286488A1 (en) | Snap-cure flexible electrically conductive one-component (1k) epoxy adhesive composition | |
| CN117659794A (en) | Coating composition, preparation method thereof, photovoltaic back sheet and photovoltaic module | |
| CN117050675A (en) | Pressure-sensitive adhesive and pressure-sensitive adhesive tape using same | |
| CN117586723A (en) | Acrylic resin glue, preparation method thereof and battery protection adhesive tape using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |