CN115353851A - Silicon-containing hydrophobic adhesive for lithium battery aluminum plastic film and use method thereof - Google Patents
Silicon-containing hydrophobic adhesive for lithium battery aluminum plastic film and use method thereof Download PDFInfo
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- CN115353851A CN115353851A CN202211147392.5A CN202211147392A CN115353851A CN 115353851 A CN115353851 A CN 115353851A CN 202211147392 A CN202211147392 A CN 202211147392A CN 115353851 A CN115353851 A CN 115353851A
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- Prior art keywords
- diisocyanate
- silicon
- hydrophobic adhesive
- plastic film
- containing hydrophobic
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- 230000001070 adhesive effect Effects 0.000 title claims abstract description 50
- 239000000853 adhesive Substances 0.000 title claims abstract description 49
- 239000002985 plastic film Substances 0.000 title claims abstract description 49
- 229920006255 plastic film Polymers 0.000 title claims abstract description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 47
- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 41
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 38
- 239000010703 silicon Substances 0.000 title claims abstract description 38
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 53
- -1 polysiloxane Polymers 0.000 claims abstract description 31
- 239000004677 Nylon Substances 0.000 claims abstract description 28
- 229920001778 nylon Polymers 0.000 claims abstract description 28
- 239000003960 organic solvent Substances 0.000 claims abstract description 17
- 125000005442 diisocyanate group Chemical group 0.000 claims abstract description 14
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 14
- 229920000728 polyester Polymers 0.000 claims abstract description 13
- 230000001588 bifunctional effect Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000011888 foil Substances 0.000 claims description 20
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 17
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 17
- 239000013638 trimer Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 10
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- 239000011265 semifinished product Substances 0.000 claims description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000007865 diluting Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 claims description 6
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 claims description 6
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 claims description 6
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 5
- 239000001361 adipic acid Substances 0.000 claims description 5
- 235000011037 adipic acid Nutrition 0.000 claims description 5
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 5
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 claims description 3
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 claims description 3
- ICLCCFKUSALICQ-UHFFFAOYSA-N 1-isocyanato-4-(4-isocyanato-3-methylphenyl)-2-methylbenzene Chemical compound C1=C(N=C=O)C(C)=CC(C=2C=C(C)C(N=C=O)=CC=2)=C1 ICLCCFKUSALICQ-UHFFFAOYSA-N 0.000 claims description 3
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 3
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 3
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 3
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 claims 2
- 150000002009 diols Chemical class 0.000 claims 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims 1
- YSRSBDQINUMTIF-SNVBAGLBSA-N (2r)-decane-1,2-diol Chemical compound CCCCCCCC[C@@H](O)CO YSRSBDQINUMTIF-SNVBAGLBSA-N 0.000 claims 1
- 229940043375 1,5-pentanediol Drugs 0.000 claims 1
- ALVZNPYWJMLXKV-UHFFFAOYSA-N 1,9-Nonanediol Chemical compound OCCCCCCCCCO ALVZNPYWJMLXKV-UHFFFAOYSA-N 0.000 claims 1
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 claims 1
- 125000003277 amino group Chemical group 0.000 claims 1
- 229940097037 decylene glycol Drugs 0.000 claims 1
- 229960005082 etohexadiol Drugs 0.000 claims 1
- SXCBDZAEHILGLM-UHFFFAOYSA-N heptane-1,7-diol Chemical compound OCCCCCCCO SXCBDZAEHILGLM-UHFFFAOYSA-N 0.000 claims 1
- 229940051250 hexylene glycol Drugs 0.000 claims 1
- WCVRQHFDJLLWFE-UHFFFAOYSA-N pentane-1,2-diol Chemical compound CCCC(O)CO WCVRQHFDJLLWFE-UHFFFAOYSA-N 0.000 claims 1
- 230000004888 barrier function Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 12
- 239000010410 layer Substances 0.000 description 10
- 238000004080 punching Methods 0.000 description 8
- 238000009835 boiling Methods 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 241001330498 Corsia Species 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- INSRQEMEVAMETL-UHFFFAOYSA-N decane-1,1-diol Chemical compound CCCCCCCCCC(O)O INSRQEMEVAMETL-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- MHIBEGOZTWERHF-UHFFFAOYSA-N heptane-1,1-diol Chemical compound CCCCCCC(O)O MHIBEGOZTWERHF-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- FVXBCDWMKCEPCL-UHFFFAOYSA-N nonane-1,1-diol Chemical compound CCCCCCCCC(O)O FVXBCDWMKCEPCL-UHFFFAOYSA-N 0.000 description 2
- OEIJHBUUFURJLI-UHFFFAOYSA-N octane-1,8-diol Chemical compound OCCCCCCCCO OEIJHBUUFURJLI-UHFFFAOYSA-N 0.000 description 2
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical compound CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/61—Polysiloxanes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a silicon-containing hydrophobic adhesive for a lithium battery aluminum plastic film, which consists of a main agent, a curing agent and an organic solvent, wherein the main agent is obtained by the reaction of hydroxyl-terminated polyester, diisocyanate and bifunctional polysiloxane. The silicon-containing hydrophobic adhesive is adopted on the nylon outer layer of the aluminum-plastic film, so that the aluminum-plastic film can be prevented from being invaded by moisture in the using process, the barrier property of the aluminum-plastic film is ensured, and the safety and the appearance performance of the soft package lithium battery are improved.
Description
Technical Field
The invention relates to the field of aluminum plastic films for soft-package lithium batteries, in particular to a silicon-containing hydrophobic adhesive for an aluminum plastic film for a lithium battery and a using method thereof.
Background
The aluminum-plastic film is a composite material consisting of a plastic film, an aluminum foil and an adhesive, and the quality of the performance of the aluminum-plastic film directly influences the service life of the battery. Due to the inherent water absorption of nylon and the hydrophilic property of the corresponding adhesive, the finished aluminum plastic film is difficult to maintain under the soaking of long-term moisture even if the finished aluminum plastic film has excellent high-temperature and high-humidity resistance and boiling resistance.
Therefore, how to increase the hydrophobicity of the nylon outer layer adhesive becomes one of the directions of the research of the technicians in the field.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide the silicon-containing hydrophobic adhesive for the lithium battery aluminum plastic film, so that the long-term high-temperature high-humidity resistance and boiling resistance of the finished aluminum plastic film are improved, and the barrier property of the aluminum plastic film is ensured.
The invention also provides a use method of the silicon-containing hydrophobic adhesive for the lithium battery aluminum plastic film.
The purpose of the invention is realized as follows:
the invention provides a silicon-containing hydrophobic adhesive for a lithium battery aluminum plastic film, which comprises the following components in parts by mole:
10-30 parts of a main agent;
1-5 parts of a curing agent;
50-250 parts of an organic solvent;
the main agent is obtained by reacting hydroxyl-terminated polyester, diisocyanate and bifunctional polysiloxane, and the preparation method of the main agent comprises the following steps:
the method comprises the following steps: adding 20-25 molar parts of dihydric alcohol into a reaction vessel, heating to 65-85 ℃ under the protection of nitrogen, adding 19-23 molar parts of dibasic acid with stirring, carrying out staged heating under the same condition, controlling the top temperature of a reflux column to be not more than 100 ℃, cooling to 200-210 ℃ and reducing the pressure when the water yield reaches 36-44 molar parts, so that the residual vacuum pressure is less than 10mmHg, and cooling to below 120 ℃ when the acid value is reduced to 0.5mgKOH/g, thus obtaining the hydroxyl-terminated polyester for later use;
step two: and (2) adding the hydroxyl-terminated polyester obtained in the step one into a reaction container, carrying out vacuum dehydration for 3h at the temperature of 110-115 ℃, then cooling to 45-50 ℃, slowly adding 2.5-4 molar parts of diisocyanate, heating to 75-85 ℃, reacting for 2h, adding 2-8 molar parts of bifunctional polysiloxane, reacting for 1h, cooling and discharging to obtain the main agent.
The silicon-containing hydrophobic adhesive is characterized in that the dihydric alcohol and the dibasic acid are both symmetrical in structure and have no side group, the dihydric alcohol is selected from at least one of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, nonanediol and decanediol, and the dibasic acid is selected from at least one of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid.
The hydrophobic adhesive containing silicon is characterized in that the diisocyanate has both symmetrical and rigid structures, and is selected from at least one of p-phenylene diisocyanate, 2,6-toluene diisocyanate, 4,4 '-diphenylmethane diisocyanate, 3,3' -dimethylbiphenyl-4,4 '-diisocyanate, 1,5-naphthalene diisocyanate, and 4,4' -dicyclohexylmethane diisocyanate.
The silicon-containing hydrophobic adhesive is characterized in that the active end group of the bifunctional polysiloxane is hydroxyl or amino, and is selected from one of alpha, omega-dihydroxyalkyl polydimethylsiloxane with a structure shown in formula 1, alpha, omega-dihydroxyalkyl polydimethylsiloxane with a structure shown in formula 2 and alpha, omega-diamino polydimethylsiloxane with a structure shown in formula 3, wherein the structures shown in formulas 1 to 3 are as follows:
wherein R is 0 、R 1 Each independently selected from C 2 ～C 10 The number of repeating units n is independently selected from 5 to 15.
The silicon-containing hydrophobic adhesive is characterized in that the curing agent is a trifunctional diisocyanate trimer selected from 2,4-toluene diisocyanate trimer, 2,2' -diphenylmethane diisocyanate trimer, isophorone diisocyanate trimer and hexamethylene diisocyanate trimer.
The silicon-containing hydrophobic adhesive is characterized in that the organic solvent is at least one selected from N, N' -dimethylformamide, dimethyl sulfoxide, ethyl acetate, cyclohexane, N-hexane, toluene, tetrahydrofuran, acetone and butanone.
The invention also provides a use method of the silicon-containing hydrophobic adhesive for the lithium battery aluminum plastic film, wherein the lithium battery aluminum plastic film comprises a nylon layer and an aluminum foil/polypropylene semi-finished product, and the method comprises the following steps:
step 1: weighing the raw materials according to the formula ratio, firstly diluting the main agent by using 90% of organic solvent to obtain a main agent solution, diluting the curing agent by using the rest organic solvent to obtain a curing agent solution, adding the curing agent solution into the main agent solution with stirring, and filtering large-particle-size physical particles of the mixed solution by using a filter to obtain the silicon-containing hydrophobic adhesive, wherein the cut-off particle size of the filter is 0.8 mu m;
step 2: coating the silicon-containing hydrophobic adhesive on the surface of the nylon layer, wherein the coating weight is 4-8g/m 2 And pressing the nylon layer and the aluminum foil/polypropylene semi-finished product together, and curing to obtain the aluminum-plastic film after the organic solvent is volatilized, wherein the curing temperature is 60-90 ℃, and the curing time is 3-10 days.
Compared with the prior art, the invention has the following beneficial effects:
the silicon-containing hydrophobic adhesive is adopted on the nylon outer layer of the aluminum-plastic film, so that the aluminum-plastic film can be prevented from being invaded by moisture in the using process, the barrier property of the aluminum-plastic film is ensured, and the safety and the appearance performance of the soft package lithium battery are improved.
Drawings
FIG. 1 is a schematic structural diagram of a lithium battery aluminum plastic film prepared by using the silicon-containing hydrophobic adhesive of the invention.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention provides a silicon-containing hydrophobic adhesive for a lithium battery aluminum plastic film, which comprises the following components in parts by mole:
10-30 parts of a main agent;
1-5 parts of a curing agent;
50-250 parts of organic solvent.
The main agent is obtained by reacting hydroxyl-terminated polyester, diisocyanate and bifunctional polysiloxane, and the preparation method of the main agent comprises the following steps:
the method comprises the following steps: adding 20-25 molar parts of dihydric alcohol into a reaction vessel, heating to 65-85 ℃ under the protection of nitrogen, adding 19-23 molar parts of dibasic acid with stirring, carrying out staged heating under the same condition, controlling the top temperature of a reflux column to be not more than 100 ℃, cooling to 200-210 ℃ and reducing the pressure when the water yield reaches 36-44 molar parts, so that the residual vacuum pressure is less than 10mmHg, and cooling to below 120 ℃ when the acid value is reduced to 0.5mgKOH/g, thus obtaining the hydroxyl-terminated polyester for later use;
step two: and (2) adding the hydroxyl-terminated polyester obtained in the step one into a reaction container, carrying out vacuum dehydration at 110-115 ℃ for 3h, then cooling to 45-50 ℃, slowly adding 2.5-4 molar parts of diisocyanate, heating to 75-85 ℃ for reaction for 2h, then adding 2-8 molar parts of bifunctional polysiloxane, reacting for 1h, cooling and discharging to obtain the main agent.
The structure of the main agent is shown as formula 4 or formula 5:
wherein R is 2 、R 3 Each independently selected from C 2 ～C 10 An alkyl group;
R 4 is that
At least one of;
u/v≈1.1/1，x/y/z≈20/4/(2～5)。
in the preparation method of the main agent, the raw material dihydric alcohol and the dibasic acid are both symmetrical in structure and have no side group, the dihydric alcohol is selected from at least one of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, heptanediol, octanediol, nonanediol and decanediol, and the dibasic acid is selected from at least one of succinic acid, glutaric acid, adipic acid, pimelic acid, octanedioic acid, azelaic acid and decanedioic acid.
The diisocyanate has both symmetrical and rigid structure and is selected from at least one of p-phenylene diisocyanate, 2,6-toluene diisocyanate, 4,4 '-diphenylmethane diisocyanate, 3,3' -dimethylbiphenyl-4,4 '-diisocyanate, 1,5-naphthalene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate.
The active end group of the bifunctional polysiloxane is hydroxyl or amino, and is selected from one of alpha, omega-dihydroxyalkyl polydimethylsiloxane with a structure shown in formula 1, alpha, omega-dihydroxyl polydimethylsiloxane with a structure shown in formula 2 and alpha, omega-diamino polydimethylsiloxane with a structure shown in formula 3, wherein the structures shown in formulas 1 to 3 are as follows:
wherein R is 0 、R 1 Each independently selected from C 2 ～C 10 The number of repeating units n is independently selected from 5 to 15.
The curing agent is trifunctional diisocyanate trimer, and is selected from 2,4-toluene diisocyanate trimer, 2,2' -diphenylmethane diisocyanate trimer, isophorone diisocyanate trimer and hexamethylene diisocyanate trimer.
The organic solvent is at least one selected from N, N' -dimethylformamide, dimethyl sulfoxide, ethyl acetate, cyclohexane, N-hexane, toluene, tetrahydrofuran, acetone and butanone.
The invention also provides a use method of the silicon-containing hydrophobic adhesive for the lithium battery aluminum-plastic film, wherein the lithium battery aluminum-plastic film comprises a nylon layer and an aluminum foil/polypropylene semi-finished product, and the use method comprises the following steps:
step 1: weighing the raw materials according to the formula ratio, firstly diluting the main agent by using 90% of organic solvent to obtain a main agent solution, diluting the curing agent by using the rest organic solvent to obtain a curing agent solution, adding the curing agent solution into the main agent solution with stirring, and filtering large-particle-size physical particles of the mixed solution by using a filter to obtain the silicon-containing hydrophobic adhesive, wherein the cut-off particle size of the filter is 0.8 mu m;
step 2: and coating the silicon-containing hydrophobic adhesive on the surface of the nylon layer, wherein the coating weight is 4-8g/m & lt 2 & gt, pressing the nylon layer and the aluminum foil/polypropylene semi-finished product together, and curing after the organic solvent is volatilized to obtain the aluminum-plastic film, wherein the curing temperature is 60-90 ℃, and the curing time is 3-10 days.
The raw materials and their sources used in the following examples are specifically as follows:
1. the dihydric alcohol is hexanediol which is purchased from chemical reagent of national medicine group, inc.;
2. the dibasic acid is adipic acid and is purchased from chemical reagents of national medicine group, inc.;
3. the diisocyanate is 2,6-toluene diisocyanate which is purchased from Corsia Polymer (China) Co.Ltd;
4. the bifunctional polysiloxane is alpha, omega-dihydroxyalkyl polydimethylsiloxane (structure shown in formula 1, R) which is purchased from Bike auxiliary agent (Shanghai) Limited company and has the product brand of BYK-307 0 is-CH 2 -CH 2 -, n is 8), alpha, omega-dihydroxypolydimethylsiloxane (formula 2, n is 3) available from Bike adjuvant (Shanghai) Co., ltd under the product designation BYK-329, and alpha, omega-diaminopolydimethylsiloxane (formula 3, R is 3) available from Bike adjuvant (Shanghai) Co., ltd under the product designation BYK-378 1 is-CH 2 -CH 2 -, n is 8);
5. the curing agent is isophorone diisocyanate trimer which is purchased from Corsia polymer (China) Limited and has the product brand of
Z 4470 MPA/X；
6. The organic solvent is N, N' -dimethylformamide and is purchased from national pharmaceutical group chemical reagent limited.
The features and properties of the present invention are further described in detail below in conjunction with the examples.
Example 1
The preparation raw materials of the silicon-containing hydrophobic adhesive comprise, by mole:
20 portions of main agent
2.9 parts of curing agent
200 portions of N, N' -dimethylformamide
The preparation method of the main agent comprises the following steps:
the method comprises the following steps: adding 25 molar parts of hexanediol into a reaction vessel, heating to 65-85 ℃ under the protection of nitrogen, adding 23 molar parts of adipic acid with stirring, carrying out stage-type temperature rise under the same conditions, controlling the temperature of the top of a reflux column to be not more than 100 ℃, cooling to 200-210 ℃ and reducing the pressure when the water yield is close to 42 molar parts, so that the vacuum residual pressure is less than 10mmHg, cooling to below 120 ℃ when the acid value is about 0.5mgKOH/g, obtaining hydroxyl-terminated polyester, and pouring the hydroxyl-terminated polyester into a clean and dry vessel for later use;
step two: adding the hydroxyl-terminated polyester prepared in the step one into a reaction container, dehydrating for 3h in vacuum at 110-115 ℃, then cooling to 45-50 ℃, slowly adding 4 molar parts of 2,6-toluene diisocyanate, heating to 75-85 ℃, reacting for 2h, and then adding 2 molar parts of alpha, omega-dihydroxyalkyl polydimethylsiloxane (R) with the structure shown in formula 1 0 is-CH 2 -CH 2 And n is 8), reacting for 1h, cooling and discharging to obtain the main agent.
The curing agent contains isophorone diisocyanate trimer as the active ingredient.
The use method of the embodiment is to prepare the aluminum-plastic film by coating the silicon-containing hydrophobic adhesive on the surface of nylon and then compounding the nylon with the aluminum foil/polypropylene semi-finished product, and comprises the following specific steps:
step 1: weighing the raw materials according to the formula, firstly diluting 20 mol parts of the main agent by using 180 mol parts of N, N '-dimethylformamide to obtain a main agent solution, then diluting 2.9 mol parts of the curing agent by using the remaining 20 mol parts of N, N' -dimethylformamide to obtain a curing agent solution, adding the curing agent solution into the main agent solution with stirring, and filtering large-particle-size physical particles of the mixed solution by a filter (the particle size intercepted by the filter is 0.8 mu m) to obtain the silicon-containing hydrophobic adhesive;
step 2: coating silicon-containing hydrophobic adhesive on the surface of nylon (coating weight is 5 g/m) 2 ) Then pressing and laminating the nylon and the aluminum foil/polypropylene semi-finished product together, volatilizing the solvent and curing to obtain the aluminum-plastic film, wherein the curing temperature is 70 ℃, and the curing time is 7 days.
The aluminum plastic film structure of the lithium battery is shown in figure 1 and comprises a nylon layer 2, an aluminum foil/polypropylene semi-finished product 1 and a silicon-containing hydrophobic adhesive layer 3 arranged between the nylon layer 2 and the aluminum foil/polypropylene semi-finished product 1.
Example 2
This example differs from example 1 in that the difunctional polysiloxane was an alpha, omega-dihydroxypolydimethylsiloxane of the structure shown in formula 2 and the number of repeating units n was 3.
Example 3
This example differs from example 1 in that the charge fraction of the alpha, omega-dihydroxyalkylpolydimethylsiloxane was 5 molar parts in the preparation of the base compound.
Example 4
This example differs from example 1 in that the amount of the α, ω -dihydroxyalkyl polydimethylsiloxane to be charged in the preparation of the base compound was 8 parts by mole.
Example 5
This example differs from example 1 in that the curing temperature was 80 ℃ in the method used in the examples.
Example 6
This example differs from example 1 in that the curing time was 9 days in the example method of use.
Example 7
This example differs from example 1 in that the difunctional polysiloxane is an alpha, omega-diaminopolydimethylsiloxane of the structure shown in formula 3 and R is an alpha, omega-diaminopolydimethylsiloxane 1 is-CH 2 -CH 2 The number of repeating units n is 8.
Comparative example 1
This comparative example differs from example 1 in that no difunctional polysiloxane was added to the main component when it was prepared.
Comparative example 2
The comparative example is a conventional finished aluminum-plastic film with the same interlayer structure on the market.
For examples 1 to 7 and comparative examples 1 and 2, the bonding fastness of the aluminum foil and nylon is characterized by the initial peel strength of the aluminum foil/nylon, and the high-temperature and high-humidity resistance of the aluminum foil/nylon is reflected by the peel strength of the aluminum foil/nylon after high-temperature and high-humidity treatment.
Characterization of high temperature and high humidity resistance stripping performance of aluminum plastic film
Strips 15mm wide were drawn from examples 1 to 7 and comparative examples 1 and 2, placed in a constant temperature and humidity chamber with an environmental parameter of 70 ℃ and 90% RH, two strips were taken out after 0h, 1h, 4h and 8h in this order, the nylon and aluminum foil were peeled off and the peel strength was measured on a general tensile machine with a distance between the upper and lower clamps of 50mm and a tensile speed of 200mm/min.
The test results are shown in table 1 below:
TABLE 1 results of the peeling property test for examples 1 to 7 and comparative examples 1 and 2
The above experimental data show that the aluminum foil/nylon initial peel strength of the aluminum plastic films selected with the silicon-containing hydrophobic adhesive (examples 1-4, 7) is slightly lower than that of the aluminum plastic films selected with the non-silica adhesive (comparative examples 1, 2) with the same processing parameters; as the fraction of α, ω -dihydroxyalkyl polydimethylsiloxane charge was increased from 2 (example 1) to 5 (example 3) and 8 (example 4), the bond strength decreased from 4.55 to 4.45 and 4.25; the selection of aluminium-plastic films with adhesives containing different chain lengths (example 2) and different end groups of polydimethylsiloxane (example 7) was not temporarily different. This is because the low surface tension polydimethylsiloxane slightly reduces the spreading and wetting ability of the adhesive, which in turn leads to a reduction in its adhesive properties, and can be improved by increasing the curing temperature to 80 ℃ (example 5) or by extending the curing time to 9 days (example 6).
The peel strength of aluminum foil/nylon of the aluminum plastic film (examples 1-7) containing silicon hydrophobic adhesive was not significantly reduced after being placed under high temperature and high humidity conditions for several hours, while the peel strength of aluminum foil/nylon of the aluminum plastic film (comparative examples 1, 2) containing no silica gel adhesive was significantly reduced. Therefore, the introduction of the hydrophobic polydimethylsiloxane component effectively improves the high-temperature and high-humidity resistance of the adhesive.
Characterization of boiling resistance of aluminum plastic film
According to the examples 1-7 and the comparative examples 1 and 2, the shell punching depth of 7.0mm is obtained by punching through a deep punching machine, then the shell punching machine is placed in a water bath environment at 60 ℃ for several hours, the shell punching machine is taken out to observe the layering condition of nylon and aluminum foil on the outer side of the shell punching (taking 10 samples as a group), and the boiling resistance of the aluminum plastic film is judged according to the time when the shell punching of each sample starts to be layered and the number of the shell punching of each sample.
The test results are shown in table 2 below:
TABLE 2 test results of boiling resistance of examples 1 to 7 and comparative examples 1 and 2
The above experimental data show that the boiling resistance of the aluminum-plastic film (examples 1-7) using the silicon-containing hydrophobic adhesive is better than that of the aluminum-plastic film (comparative examples 1 and 2) using the non-silica adhesive, and is consistent with the high temperature and high humidity resistance.
The analysis and comparison of test results show that the application of the polydimethylsiloxane-containing adhesive obviously improves the high-temperature high-humidity resistance and boiling resistance of the aluminum-plastic film, and has obvious advantages compared with the conventional aluminum-plastic film.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (7)
1. The silicon-containing hydrophobic adhesive for the lithium battery aluminum plastic film is characterized in that: the silicon-containing hydrophobic adhesive comprises the following components in parts by mole:
10-30 parts of a main agent;
1-5 parts of a curing agent;
50-250 parts of an organic solvent;
the main agent is obtained by reacting hydroxyl-terminated polyester, diisocyanate and bifunctional polysiloxane, and the preparation method of the main agent comprises the following steps:
the method comprises the following steps: adding 20-25 molar parts of dihydric alcohol into a reaction vessel, heating to 65-85 ℃ under the protection of nitrogen, adding 19-23 molar parts of dibasic acid with stirring, carrying out staged temperature rise under the same condition, controlling the temperature of the top of a reflux column to be not more than 100 ℃, reducing the temperature to 200-210 ℃ and reducing the pressure when the water yield reaches 36-44 molar parts, so that the residual vacuum pressure is less than 10mmHg, reducing the acid value to 0.5mgKOH/g, and reducing the temperature to below 120 ℃ to obtain hydroxyl-terminated polyester for later use;
step two: and (2) adding the hydroxyl-terminated polyester obtained in the step one into a reaction container, carrying out vacuum dehydration for 3h at the temperature of 110-115 ℃, then cooling to 45-50 ℃, slowly adding 2.5-4 molar parts of diisocyanate, heating to 75-85 ℃, reacting for 2h, adding 2-8 molar parts of bifunctional polysiloxane, reacting for 1h, cooling and discharging to obtain the main agent.
2. The hydrophobic adhesive of claim 1, wherein the diol and the diacid are both structurally symmetric and free of pendant groups, the diol is at least one selected from the group consisting of ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, heptylene glycol, octylene glycol, nonylene glycol, and decylene glycol, and the diacid is at least one selected from the group consisting of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, and sebacic acid.
3. The silicon-containing hydrophobic adhesive of claim 1, wherein the diisocyanate has both a symmetrical and rigid structure and is selected from at least one of p-phenylene diisocyanate, 2,6-toluene diisocyanate, 4,4 '-diphenylmethane diisocyanate, 3,3' -dimethylbiphenyl-4,4 '-diisocyanate, 1,5-naphthalene diisocyanate, 4,4' -dicyclohexylmethane diisocyanate.
4. The hydrophobic adhesive according to claim 1, wherein the reactive end group of the bifunctional polysiloxane is a hydroxyl group or an amine group, and is selected from one of α, ω -dihydroxyalkyl polydimethylsiloxane having a structure shown in formula 1, α, ω -dihydroxyalkyl polydimethylsiloxane having a structure shown in formula 2, and α, ω -diamino polydimethylsiloxane having a structure shown in formula 3, and the structures shown in formulae 1 to 3 are as follows:
wherein R is 0 、R 1 Each independently selected from C 2 ～C 10 The number of repeating units n is independently selected from 5 to 15.
5. The silicon-containing hydrophobic adhesive of claim 1, wherein the curing agent is a trifunctional diisocyanate trimer selected from at least one of 2,4-toluene diisocyanate trimer, 2,2' -diphenylmethane diisocyanate trimer, isophorone diisocyanate trimer and hexamethylene diisocyanate trimer.
6. The hydrophobic adhesive according to claim 1, wherein the organic solvent is at least one selected from the group consisting of N, N' -dimethylformamide, dimethylsulfoxide, ethyl acetate, cyclohexane, N-hexane, toluene, tetrahydrofuran, acetone, and methyl ethyl ketone.
7. The use method of the silicon-containing hydrophobic adhesive for the lithium battery aluminum plastic film as claimed in any one of claims 1 to 6, wherein the lithium battery aluminum plastic film comprises a nylon layer, an aluminum foil/polypropylene semi-finished product, and is characterized by comprising the following steps:
step 1: weighing the raw materials according to the formula ratio, firstly diluting the main agent by using 90% of organic solvent to obtain a main agent solution, diluting the curing agent by using the rest organic solvent to obtain a curing agent solution, adding the curing agent solution into the main agent solution with stirring, and filtering large-particle-size physical particles of the mixed solution by using a filter to obtain the silicon-containing hydrophobic adhesive, wherein the cut-off particle size of the filter is 0.8 mu m;
step 2: coating the silicon-containing hydrophobic adhesive on the surface of the nylon layer, wherein the coating weight is 4-8g/m 2 And pressing the nylon layer and the aluminum foil/polypropylene semi-finished product together, and curing to obtain the aluminum-plastic film after the organic solvent is volatilized, wherein the curing temperature is 60-90 ℃, and the curing time is 3-10 days.
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