CN109370488B - Special anti-warping adhesive for lithium battery, preparation method and anti-warping tab adhesive tape - Google Patents
Special anti-warping adhesive for lithium battery, preparation method and anti-warping tab adhesive tape Download PDFInfo
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- CN109370488B CN109370488B CN201811193125.5A CN201811193125A CN109370488B CN 109370488 B CN109370488 B CN 109370488B CN 201811193125 A CN201811193125 A CN 201811193125A CN 109370488 B CN109370488 B CN 109370488B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1812—C12-(meth)acrylate, e.g. lauryl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2479/00—Presence of polyamine or polyimide
- C09J2479/08—Presence of polyamine or polyimide polyimide
- C09J2479/086—Presence of polyamine or polyimide polyimide in the substrate
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to the field of lithium battery safety protection, in particular to a special anti-warping adhesive for a lithium battery, a preparation method of the special anti-warping adhesive and an anti-warping tab adhesive tape. The anti-warping adhesive special for the lithium battery comprises 10-50 parts of isooctyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of a free radical initiator azobisisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2, 2' -bipyridyl, 50-150 parts of an organic solvent, 1-10 parts of trimethylolpropane triglycidyl ether, 0.01-1 part of aluminum acetylacetonate and 0.1-1 part of a curing accelerator. According to the invention, an inorganic and organic double hybrid crosslinking system is designed, the double crosslinking system greatly improves the cohesive force of an adhesive layer, and the anti-warping performance of the tab bonded by the tab adhesive tape is improved.
Description
Technical Field
The invention relates to the field of lithium battery safety protection, in particular to a special anti-warping adhesive for a lithium battery, a preparation method of the special anti-warping adhesive and an anti-warping tab adhesive tape.
Background
In the assembly and production process of the lithium ion battery, a special adhesive tape is generally used for fixing, insulating and protecting the tab position of the lithium ion battery. The special adhesive tape for the lithium battery generally adopts a high-molecular PI film as a base material, and special glue is coated on the base material, wherein the thickness of the special adhesive tape is 20-100 mu m. The adhesive tape special for the lithium battery generally has the advantages of good viscosity, no residual adhesive left after the adhesive tape is uncovered, high temperature resistance, electrolyte resistance, high electrical insulation and the like. Acrylic acid acrylic glue is commonly coated on a PI film at present to prepare the polar ear adhesive tape. Although the acrylic acid system tab adhesive tape shows better viscosity in the battery assembly process, the back surfaces of most tabs are subjected to release treatment in the tab winding process, so that the adhesion of the tab adhesive tape is reduced, and the tab adhesive tape is easy to warp or degum in the long-term use process. At present, the double-layer structure tab adhesive tape which is not subjected to release treatment rarely appears in the market. The main reason is that the tab adhesive tape is not subjected to release treatment, so that the unwinding force is high, and the unwinding and degumming phenomena are generated.
Disclosure of Invention
Therefore, the first object of the present invention is to provide a special anti-warping adhesive for a lithium battery, which has good adhesion, no warping, and high temperature resistance.
The object of the invention is thus achieved.
The anti-warping adhesive special for the lithium battery comprises 10-50 parts of isooctyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of a free radical initiator azobisisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2, 2' -bipyridyl, 50-150 parts of an organic solvent, 1-10 parts of trimethylolpropane triglycidyl ether, 0.01-1 part of aluminum acetylacetonate and 0.1-1 part of a curing accelerator; the above are all parts by mass.
The technical scheme can be further perfected as follows.
The organic solvent is one or two or three of ethyl acetate, toluene and butyl acetate; the curing accelerator is one or a mixture of two or a mixture of three of triethanolamine, dimethylaniline and 2,4, 6-tris (dimethylaminomethyl) phenol.
The second purpose of the invention is to provide a preparation method of the anti-warping adhesive special for the lithium battery, which has the advantages of good viscosity, no warping and high temperature resistance.
The object of the invention is thus achieved.
A preparation method of a special anti-warping adhesive for a lithium battery comprises the steps of mixing 10-50 parts of isooctyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of a free radical initiator azobisisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2, 2' -bipyridine and 50-150 parts of an organic solvent, then carrying out nitrogen deoxygenation for 30-120 minutes, controlling the temperature to be 60-120 ℃, carrying out reverse atom transfer radical polymerization under the protection of nitrogen, carrying out polymerization for 1-30 hours, controlling the number average molecular weight to be 100000-500000, controlling the molecular weight polydispersity to be 1.0-1.5, controlling the glass transition temperature to be-45-20 ℃, reducing the reaction temperature to 10-30 ℃, then adding 0.01-1 part of aluminum acetylacetonate, 1-10 parts of trimethylolpropane triglycidyl ether and 0.1-1 part of curing accelerator, and mixing to obtain the special anti-tilting adhesive for the lithium battery; the above are all parts by mass.
The third purpose of the invention is to provide the anti-warping tab adhesive tape of the anti-warping adhesive special for the lithium-containing battery, which has good viscosity, no warping and high temperature resistance.
The object of the invention is thus achieved.
The utility model provides an anti perk utmost point ear sticky tape, includes the anti gluing agent layer of perk gluing agent of polyimide film layer, lithium cell special use, and the gluing agent layer of the anti perk gluing agent of lithium cell special use is established on a polyimide film layer surface, then the rolling is cut, obtains anti perk utmost point ear sticky tape. The anti-warping adhesive layer special for the lithium battery comprises the following components: the curing agent comprises 10-50 parts of isooctyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of a free radical initiator azobisisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2, 2' -bipyridine, 50-150 parts of an organic solvent, 1-10 parts of trimethylolpropane triglycidyl ether, 0.01-1 part of aluminum acetylacetonate and 0.1-1 part of a curing accelerator; the above are all parts by mass.
The technical scheme can be further perfected as follows.
Uniformly coating the adhesive with excellent anti-warping performance special for the lithium battery on one surface of a polyimide film layer of 1-100 microns, then placing the polyimide film layer at 80-130 ℃, and carrying out heat preservation, drying and curing for 1-10 min to obtain an adhesive layer of the anti-warping adhesive special for the lithium battery of 1-30 microns.
In order to obtain the special adhesive with excellent anti-warping performance for the lithium battery, the invention adopts a reverse atom transfer radical polymerization (R-ARTP) polymerization method to obtain the adhesive with a narrow molecular weight distribution, a uniform structure and a double cross-linking structure, and then trimethylolpropane triglycidyl ether and aluminum acetylacetonate are added for cross-linking, so that the cohesive force is improved, and the tab adhesive tape with a double-layer structure and excellent anti-warping performance is obtained.
The invention selects reverse atom transfer radical polymerization (R-ARTP) to polymerize, and synthesizes the itaconic acid and anhydride dual functional group modified acrylic pressure-sensitive adhesive with uniform chemical structure and narrower molecular weight distribution. The system eliminates the problem that the micromolecule oligomer is easy to degum.
The invention designs an inorganic and organic double hybrid crosslinking system, wherein the double crosslinking system comprises aluminum salt-itaconic acid to generate inorganic crosslinking and anhydride-epoxy to generate organic crosslinking, and the double crosslinking system greatly improves the cohesive force of an adhesive layer.
The invention designs the tab adhesive tape with the double-layer structure and without release treatment, solves the problem that the tab adhesive tape is easy to degum when being uncoiled, and improves the anti-warping performance of the tab adhered by the tab adhesive tape.
Drawings
Fig. 1 is a schematic structural view of the tab tape with excellent anti-lifting performance in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto. The parts referred to in the following examples are parts by mass.
Example one, which is an adhesive with excellent anti-lift performance specially used for a lithium battery, is prepared by the following steps of synthesizing the adhesive with excellent anti-lift performance specially used for the lithium battery, mixing 40 parts of isooctyl acrylate (EHA), 10 parts of dodecyl acrylate (LA), 4 parts of itaconic acid, 3 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA), 2 parts of tetrahydrofuran acrylate (THFA), 0.02 part of a radical initiator, namely Azobisisobutyronitrile (AIBN), 0.2 part of copper chloride, 0.3 part of 2, 2' -bipyridine and 100 parts of toluene, deoxidizing with nitrogen for 90 minutes, controlling the temperature at 75 ℃, performing reverse atom transfer radical polymerization (R-ARTP) polymerization for 10 hours under the protection of nitrogen, and controlling the number average molecular weight (Mn) to be 455100, controlling the molecular weight polydispersity number to be 1.3, reducing the reaction temperature to 30 ℃, adding 1 part of trimethylolpropane triglycidyl ether, 0.2 part of aluminum acetylacetonate and 0.1 part of curing accelerator 2,4, 6-tris (dimethylaminomethyl) phenol, and mixing to obtain the special adhesive with excellent anti-warping performance for the lithium battery; the above are all parts by mass.
And (3) combining the figure 1, preparing the tab adhesive tape with excellent anti-warping performance.
Uniformly coating the adhesive with excellent anti-warping performance special for the lithium battery prepared in the step one on the surface of a PI polyimide film layer 1 with the thickness of 60 micrometers, then placing the PI polyimide film layer at the temperature of 120 ℃, preserving heat, drying and curing for 2min to obtain an adhesive layer 2 of the adhesive with excellent anti-warping performance special for the lithium battery with the thickness of 30 micrometers, and rolling and slitting to obtain the tab adhesive tape with excellent anti-warping performance special for the lithium battery.
Example two, which is an adhesive with excellent anti-lift performance specially used for a lithium battery, is prepared by the following steps of synthesizing the adhesive with excellent anti-lift performance specially used for a lithium battery, mixing 30 parts of isooctyl acrylate (EHA), 20 parts of dodecyl acrylate (LA), 5 parts of itaconic acid, 5 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 8 parts of methyl acrylate (MMA), 1 part of tetrahydrofuran acrylate (THFA), 0.04 part of radical initiator Azobisisobutyronitrile (AIBN), 0.2 part of copper chloride, 0.4 part of 2, 2' -bipyridine and 80 parts of ethyl acetate, deoxidizing with nitrogen for 50 minutes, controlling the temperature at 80 ℃, performing reverse atom transfer radical polymerization (R-ARTP) polymerization for 8 hours under the protection of nitrogen, and controlling the number average molecular weight (Mn) to 321500, controlling the molecular weight polydispersity number to be 1.2, reducing the reaction temperature to 25 ℃, and then adding 2 parts of trimethylolpropane triglycidyl ether, 0.3 part of aluminum acetylacetonate and 0.2 part of curing accelerator dimethylaniline for mixing to obtain the special adhesive with excellent anti-warping performance for the lithium battery; the above are all parts by mass.
And (3) combining the figure 1, preparing the tab adhesive tape with excellent anti-warping performance.
Uniformly coating the adhesive with excellent anti-warping performance special for the lithium battery prepared in the step one on the surface of a polyimide film layer 1 with the thickness of 40 micrometers, then placing the adhesive at the temperature of 110 ℃, preserving heat, drying and curing for 3min to obtain an adhesive layer 2 of the adhesive with excellent anti-warping performance special for the 20 micrometers lithium battery, and then rolling and slitting to obtain the tab adhesive tape with excellent anti-warping performance special for the lithium battery.
Example three, which is an adhesive with excellent anti-lift performance specially used for a lithium battery, is prepared by the following steps of synthesizing the adhesive with excellent anti-lift performance specially used for the lithium battery, mixing 40 parts of isooctyl acrylate (EHA), 10 parts of dodecyl acrylate (LA), 2 parts of itaconic acid, 4 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA), 2 parts of tetrahydrofuran acrylate (THFA), 0.08 parts of radical initiator Azobisisobutyronitrile (AIBN), 0.1 part of copper chloride, 0.2 part of 2, 2' -bipyridine and 70 parts of ethyl acetate, deoxidizing with nitrogen for 100 minutes, controlling the temperature at 75 ℃, controlling the number average molecular weight (Mn) to 205200 when performing reverse atom transfer radical polymerization (R-ARTP) polymerization 20 under the protection of nitrogen, controlling the molecular weight polydispersion system number to be 1.1, reducing the reaction temperature to 20 ℃, adding 2 parts of trimethylolpropane triglycidyl ether, 0.4 part of aluminum acetylacetonate and 0.2 part of curing accelerator triethanolamine, and mixing to obtain the special adhesive with excellent anti-tilting performance for the lithium battery; the above are all parts by mass.
And (3) combining the figure 1, preparing the tab adhesive tape with excellent anti-warping performance.
Uniformly coating the adhesive with excellent anti-warping performance special for the lithium battery prepared in the step one on the surface of a PI polyimide film layer 1 with the thickness of 80 microns, then placing the PI polyimide film layer at the temperature of 130 ℃, preserving heat, drying and curing for 4min to obtain an adhesive layer 2 of the adhesive with excellent anti-warping performance special for the 20 microns lithium battery, and then rolling and slitting to obtain the tab adhesive tape with excellent anti-warping performance special for the lithium battery.
Example four, which is an adhesive with excellent anti-lift performance for a lithium battery, is prepared by the following steps of synthesizing an adhesive with excellent anti-lift performance for a lithium battery, mixing 20 parts of isooctyl acrylate (EHA), 20 parts of dodecyl acrylate (LA), 5 parts of itaconic acid, 2 parts of 4-methacryloyloxyethyl trimellitic anhydride (4-META), 5 parts of methyl acrylate (MMA), 1 part of tetrahydrofuran acrylate (THFA), 0.1 part of a radical initiator Azobisisobutyronitrile (AIBN), 0.3 part of copper chloride, 0.6 part of 2, 2' -bipyridine and 60 parts of butyl acetate, deoxidizing with nitrogen for 60 minutes, controlling the temperature at 80 ℃, performing reverse atom transfer radical polymerization (R-ARTP) polymerization for 8 hours under the protection of nitrogen, and controlling the number average molecular weight (Mn) to 162000, controlling the molecular weight polydispersity number to be 1.1, reducing the reaction temperature to 20 ℃, adding 3 parts of trimethylolpropane triglycidyl ether, 0.6 part of aluminum acetylacetonate and 0.2 part of curing accelerator 2,4, 6-tris (dimethylaminomethyl) phenol, and mixing to obtain the special adhesive with excellent anti-warping performance for the lithium battery; the above are all parts by mass.
And (3) combining the figure 1, preparing the tab adhesive tape with excellent anti-warping performance.
Uniformly coating the adhesive with excellent anti-warping performance special for the lithium battery prepared in the step one on the surface of a polyimide film layer 1 with the thickness of 50 micrometers, then placing the polyimide film layer at the temperature of 125 ℃, preserving heat, drying and curing for 4min to obtain an adhesive layer 2 of the adhesive with excellent anti-warping performance special for the lithium battery with the thickness of 10 micrometers, and rolling and slitting to obtain the tab adhesive tape with excellent anti-warping performance special for the lithium battery.
According to the invention, the adhesive with excellent anti-warping performance, which is specially used for the lithium battery and is obtained in the four embodiments, is subjected to viscosity supplementing, 180-degree stripping force, high-temperature electrolyte resistance performance index testing and charge-discharge cycle testing by referring to the current general method for testing the adhesive tape. The initial tack was tested against the GB/T4852-2002 standard. The 180 DEG peel force is tested with reference to the GB/T2792-2014 standard. All test data are compared in table 1 below.
TABLE 1 comparison of specific Performance tests for each example
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. The anti-warping adhesive special for the lithium battery is characterized by comprising 10-50 parts of isooctyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of free radical initiator azobisisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2, 2' -bipyridine, 50-150 parts of organic solvent, 1-10 parts of trimethylolpropane triglycidyl ether, 0.01-1 part of aluminum acetylacetonate and 0.1-1 part of curing accelerator; the above are all parts by mass.
2. The anti-warping adhesive special for the lithium battery as claimed in claim 1, wherein:
the organic solvent is one or a mixture of two or a mixture of three of ethyl acetate, toluene and butyl acetate;
the curing accelerator is one or a mixture of two or a mixture of three of triethanolamine, dimethylaniline and 2,4, 6-tris (dimethylaminomethyl) phenol.
3. A preparation method of the anti-warping adhesive special for the lithium battery is characterized by comprising the following steps: mixing 10-50 parts of isooctyl acrylate, 1-30 parts of dodecyl acrylate, 1-10 parts of itaconic acid, 1-5 parts of 4-methacryloyloxyethyl trimellitic anhydride, 1-10 parts of methyl acrylate, 1-5 parts of tetrahydrofuran acrylate, 0.001-0.5 part of a free radical initiator azobisisobutyronitrile, 0.001-1 part of copper chloride, 0.01-2 parts of 2, 2' -bipyridine and 50-150 parts of an organic solvent, then carrying out nitrogen deoxidization for 30-120 minutes, controlling the temperature to be 60-120 ℃, carrying out reverse atom transfer radical polymerization under the protection of nitrogen, carrying out polymerization for 1-30 hours, controlling the number average molecular weight to be 100000-500000, controlling the molecular weight polydispersity to be 1.0-1.5, controlling the glass transition temperature to be-45-20 ℃, reducing the reaction temperature to 10-30 ℃, and then adding 0.01-1 part of aluminum acetylacetonate, 1-10 parts of trimethylolpropane triglycidyl ether and 0.1-1 part of curing accelerator are mixed to obtain the special anti-warping adhesive for the lithium battery; the above are all parts by mass.
4. The utility model provides an anti perk utmost point ear sticky tape which characterized in that: the anti-warping pole lug adhesive tape comprises a polyimide film layer and an adhesive layer containing the anti-warping adhesive special for the lithium battery in claim 1, wherein the adhesive layer containing the anti-warping adhesive special for the lithium battery in claim 1 is arranged on one surface of the polyimide film layer and then is rolled and cut to obtain the anti-warping pole lug adhesive tape.
5. The lift-resistant tab tape of claim 4, wherein:
uniformly coating the anti-warping adhesive special for the lithium battery in the claim 1 on one surface of a polyimide film layer with the thickness of 1-100 microns, then placing the polyimide film layer at the temperature of 80-130 ℃, and preserving heat, drying and curing for 1-10 min to obtain an adhesive layer with the thickness of 1-30 microns and containing the anti-warping adhesive special for the lithium battery in the claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811193125.5A CN109370488B (en) | 2018-10-14 | 2018-10-14 | Special anti-warping adhesive for lithium battery, preparation method and anti-warping tab adhesive tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811193125.5A CN109370488B (en) | 2018-10-14 | 2018-10-14 | Special anti-warping adhesive for lithium battery, preparation method and anti-warping tab adhesive tape |
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| CN109370488A CN109370488A (en) | 2019-02-22 |
| CN109370488B true CN109370488B (en) | 2020-12-15 |
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|---|---|---|---|---|
| JP2009249538A (en) * | 2008-04-08 | 2009-10-29 | Kaneka Corp | Pressure-sensitive adhesive composition |
| CN101679822A (en) * | 2007-04-05 | 2010-03-24 | 蒂萨公司 | Thermally crosslinking polyacrylates and method for producing the same |
| CN102260477A (en) * | 2010-12-14 | 2011-11-30 | 上海凯鑫森产业投资控股有限公司 | Pressure-sensitive adhesive for biaxially-oriented polypropylene (BOPP) protective film and preparation method thereof |
| JP2015187187A (en) * | 2014-03-26 | 2015-10-29 | 株式会社カネカ | Radical curable composition and cured product thereof |
| CN106905884A (en) * | 2017-03-09 | 2017-06-30 | 东莞市永邦新能源科技有限公司 | A kind of attaching process of lithium battery terminal adhesive tape |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101679822A (en) * | 2007-04-05 | 2010-03-24 | 蒂萨公司 | Thermally crosslinking polyacrylates and method for producing the same |
| JP2009249538A (en) * | 2008-04-08 | 2009-10-29 | Kaneka Corp | Pressure-sensitive adhesive composition |
| CN102260477A (en) * | 2010-12-14 | 2011-11-30 | 上海凯鑫森产业投资控股有限公司 | Pressure-sensitive adhesive for biaxially-oriented polypropylene (BOPP) protective film and preparation method thereof |
| JP2015187187A (en) * | 2014-03-26 | 2015-10-29 | 株式会社カネカ | Radical curable composition and cured product thereof |
| CN106905884A (en) * | 2017-03-09 | 2017-06-30 | 东莞市永邦新能源科技有限公司 | A kind of attaching process of lithium battery terminal adhesive tape |
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| CN109370488A (en) | 2019-02-22 |
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