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Hyperbranched modified adhesive, preparation method thereof and aluminum-plastic film

A technology of adhesives and hyperbranched polymers, applied in chemical instruments and methods, adhesives, adhesive additives, etc., can solve problems such as tearing of aluminum-plastic films

Active Publication Date: 2021-05-18
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, as the thickness of the adhesive layer or the degree of crosslinking of the adhesive layer increases, the aluminum-plastic film is prone to tearing at the R angle during deep drawing

Method used

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  • Hyperbranched modified adhesive, preparation method thereof and aluminum-plastic film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of the hyperbranched modified adhesive of the present embodiment may further comprise the steps:

[0025] At first, in 70g ethyl acetate, add 2.5g bisphenol A type epoxy resin and the hyperbranched polyester (epoxy value 0.15-0.25mol / 100g, molecular weight is 3200-3600g / mol) of 0.05g epoxy-terminated hyperbranched polyester, Place it in a glass bottle and stir at room temperature for 10 minutes to make it evenly mixed;

[0026] Then, add 50g of polyester polyol (solid content is 50%, solvent ethyl acetate), after it is fully stirred, add 10g of aromatic polyisocyanate based on toluene diisocyanate (solid content is 75%, NCO content is 13.3%, and the solvent is ethyl acetate), and the hyperbranched modified adhesive is obtained after stirring evenly at room temperature.

Embodiment 2

[0028] The preparation method of the hyperbranched modified adhesive of the present embodiment may further comprise the steps:

[0029] At first, in 70g ethyl acetate, add 2.5g bisphenol A type epoxy resin and the hyperbranched polyester (epoxy value 0.15-0.25mol / 100g, molecular weight is 3200-3600g / mol) of 0.25g epoxy-terminated hyperbranched polyester, Place it in a glass bottle and stir at room temperature for 10 minutes to make it evenly mixed;

[0030] Then, add 50g of polyester polyol (solid content is 50%, solvent ethyl acetate), after it is fully stirred, add 10g of aromatic polyisocyanate based on toluene diisocyanate (solid content is 75%, NCO content is 13.3%, and the solvent is ethyl acetate), and the hyperbranched modified adhesive is obtained after stirring evenly at room temperature.

Embodiment 3

[0032] The preparation method of the hyperbranched modified adhesive of the present embodiment may further comprise the steps:

[0033] First, add 2.5g bisphenol A type epoxy resin and 0.1g hydroxyl-terminated hyperbranched polyester (hydroxyl value 520mg KOH / g, molecular weight is 2600g / mol) in 70g ethyl acetate, place it in a glass bottle Stir at room temperature for 10 minutes to make it evenly mixed;

[0034] Then, add 50g of polyester polyol (solid content is 50%, solvent ethyl acetate), after it is fully stirred, add 10g of aromatic polyisocyanate based on toluene diisocyanate (solid content is 75%, NCO content is 13.3%, and the solvent is ethyl acetate), and the hyperbranched modified adhesive is obtained after stirring evenly at room temperature.

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Abstract

The invention belongs to the technical field of lithium battery flexible packaging, and particularly relates to a hyperbranched modified adhesive, a preparation method thereof and an aluminum-plastic film. The hyperbranched modified adhesive is prepared from the following components by weight: 20-70 parts of matrix resin, 4-20 parts of a curing agent, 0.5-5 parts of a composition of hyperbranched polymer and epoxy resin and 20-90 parts of a solvent. Based on the performance advantages of low entanglement, low viscosity, good solubility, high-density functional groups and the like of a highly branched structure of the hyperbranched polymer, the hyperbranched polymer is used for modifying the adhesive, and a large number of holes in hyperbranched polymer are beneficial to plastic deformation of a matrix, so that an adhesive layer can be toughened; a large number of active functional groups can participate in an epoxy resin curing system, and the interface action with the matrix can be enhanced, so that the deep drawing performance can be improved while the bonding strength of the aluminum-plastic film is improved.

Description

technical field [0001] The invention belongs to the technical field of flexible packaging for lithium batteries, and in particular relates to a hyperbranched modified adhesive, a preparation method thereof, and an aluminum-plastic film. Background technique [0002] Self-rechargeable lithium batteries have been successfully commercialized, and lithium batteries are widely used in portable electronics, electric vehicles, and other large-scale energy storage applications due to their high energy and power density and low self-discharge rate. As the core material of soft-packed lithium batteries, aluminum-plastic film has the advantages of good safety performance, light weight and flexible design. Compared with hard steel and aluminum cases, it has better flexibility and ductility. When safety problems occur, It can generate enough buffer space for the gas and effectively prevent the battery from exploding. [0003] The aluminum-plastic film is mainly a composite material comp...

Claims

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Application Information

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IPC IPC(8): C09J167/00C09J163/00C09J11/06C09J175/04B32B27/34B32B7/12B32B15/088B32B15/20B32B15/04B32B15/085B32B27/32B32B33/00
CPCC09J167/00C09J11/06C09J175/04B32B27/34B32B7/12B32B15/088B32B15/20B32B15/043B32B15/085B32B27/32B32B33/00C08L2205/025C08L2205/03B32B2307/558C08L67/00C08L63/00C08K5/29Y02E60/10
Inventor 雷中伟张潇夏旭峰
Owner 浙江华正能源材料有限公司
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