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Photocuring adhesive for lithium battery aluminum plastic film and preparation method of photocuring adhesive

A technology of aluminum-plastic film and curing glue, which is applied in the direction of secondary batteries, electrochemical generators, battery components, etc., can solve problems such as high elastic modulus, low elongation, delamination, and bubbling. Achieve good drawing performance and heat and humidity resistance, reduce manpower and increase productivity

Pending Publication Date: 2021-05-04
浙江华正能源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the application of UV-curable adhesives on aluminum-plastic films. The reasons are as follows: First, the general UV-curable adhesives have low elongation, and aluminum-plastic films need to be drawn and formed, which requires glue with A certain elongation rate can meet the requirement of drawing a certain depth, so this aspect cannot be well applied; secondly, the elastic modulus of UV-curable adhesive is usually high, and for the aluminum-plastic film after drawing processing, The interface between the glue and the film material will generate transverse shear force, which is prone to adverse effects such as delamination and bubbling in high temperature and high humidity environment

Method used

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  • Photocuring adhesive for lithium battery aluminum plastic film and preparation method of photocuring adhesive
  • Photocuring adhesive for lithium battery aluminum plastic film and preparation method of photocuring adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The ultraviolet curable adhesive for lithium battery aluminum-plastic film of this embodiment includes the following components by weight: 50 parts of modified polyurethane acrylate oligomer, 5 parts of N,N-dimethylacrylamide, methacrylic acid iso 40 parts of bornyl ester, 3 parts of 1-hydroxycyclohexyl phenyl ketone (184), 1 part of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO), 1 part of trimethylolpropane (3-Mercaptopropionate) (TMTP) 1 part.

[0024] Wherein, the synthetic method of modified polyurethane acrylate oligomer is:

[0025] Weigh 90g of polyether diol with a molecular weight of 1800, vacuum dehydrate at 100°C for 2 hours, cool down to 70±5°C, add 40g of isophorone diisocyanate, stir for 0.5h, then heat up to 80±5°C, add 0.5g dropwise Catalyst dibutyltin dilaurate, add 3.2g of 2,2-dimethylol propionic acid after continuing to react for 4h, cool down to 50±5℃ after reacting for 1.5h, add 5.2g of hydroxyethyl acrylate dropwise, react until NCO group ...

Embodiment 2

[0030] The ultraviolet curable adhesive for lithium battery aluminum-plastic film of this embodiment includes the following components by weight: 54 parts of modified polyurethane acrylate oligomers, 8 parts of acryloyl morpholine, 35 parts of tetrahydrofuran acrylate, benzil 2 parts of dimethyl ether (651), 1 part of n-dodecyl mercaptan (NDM).

[0031] Wherein, the synthetic method of modified polyurethane acrylate oligomer is:

[0032] Weigh 90g of polyether diol with a molecular weight of 1800, vacuum dehydrate at 100°C for 2 hours, cool down to 70±5°C, add 40g of isophorone diisocyanate, stir for 0.5h, then heat up to 80±5°C, add 0.5g dropwise Catalyst dibutyltin dilaurate, add 3.2g of 2,2-dimethylol propionic acid after continuing to react for 4h, cool down to 50±5℃ after reacting for 1.5h, add 5.2g of hydroxyethyl acrylate dropwise, react until NCO group After the reaction is complete, the product obtained by cooling down is the modified polyurethane acrylate oligomer. ...

Embodiment 3

[0037] The ultraviolet curable adhesive for lithium battery aluminum-plastic film of this embodiment includes the following components by weight: 48 parts of modified polyurethane acrylate oligomers, 15 parts of hydroxypropyl acrylate, 34 parts of lauryl methacrylate, 2 -Hydroxy-2-methyl-1-phenyl-1-propanone (1173) 1 part, 2-methyl-1-(4-methylmercaptophenyl)-2-morpholine-1-propanone (907) 1 part, 1 part of tert-dodecyl mercaptan (TDM).

[0038] Wherein, the synthetic method of modified polyurethane acrylate oligomer is:

[0039] Weigh 90g of polyether diol with a molecular weight of 1800, vacuum dehydrate at 100°C for 2 hours, cool down to 70±5°C, add 40g of isophorone diisocyanate, stir for 0.5h, then heat up to 80±5°C, add 0.5g dropwise Catalyst dibutyltin dilaurate, add 3.2g of 2,2-dimethylol propionic acid after continuing to react for 4h, cool down to 50±5℃ after reacting for 1.5h, add 5.2g of hydroxyethyl acrylate dropwise, react until NCO group After the reaction is c...

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Abstract

The invention belongs to the technical field of lithium ion aluminum plastic film production, and particularly relates to a photocuring adhesive for a lithium battery aluminum plastic film. The photocuring adhesive is prepared from the following components in parts by weight: 20 to 70 parts of modified polyurethane acrylate oligomer, 5 to 20 parts of functional monomer, 20 to 70 parts of diluent monomer, 1 to 8 parts of photoinitiator and 1 to 6 parts of thiol compound. According to thephotocuring adhesive disclosed by the invention, the aluminum foil, the nylon film and the CPP film are tightly attached together, and the prepared aluminum-plastic film has good deep-punching forming performance and humidity and heat resistance; the photocuring adhesive replaces inner and outer layer glue used by a conventional aluminum plastic film, does not cause generation of volatile organic compounds (VOC) in the processing process, and is environment friendly and smaller in energy consumption; the aluminum-plastic film does not need to be cured in a drying room, so that the technological preparation period of the aluminum-plastic film is greatly shortened, the input amount of cost in the aspects of manpower, time, energy consumption and the like is reduced, and the productivity of the aluminum-plastic film is improved.

Description

technical field [0001] The invention belongs to the technical field of production of lithium-ion aluminum-plastic films, and in particular relates to a light-curable adhesive for aluminum-plastic films of lithium batteries and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density (above 100Wh / kg), small self-discharge, high working voltage (above 3.5V), long cycle life (above 1000 times), and environmental protection. Lithium-ion batteries have been used as energy storage devices in recent years. The rapid development of ion batteries is mainly used in 3C and electric vehicles and other fields. The soft-packed lithium-ion battery with aluminum-plastic film as the shell has the advantages of light weight, flexible design, and high energy density. At present, the application rate in the 3C field has exceeded 60%, and it is gradually applied to the fields of new energy vehicles and energy storage. Lithium-i...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/06H01M50/129H01M10/0525
CPCC09J175/14C09J11/06H01M10/0525Y02E60/10
Inventor 雷中伟孙剑飞夏旭峰
Owner 浙江华正能源材料有限公司
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