Adhesive resin for outer layer of aluminum-plastic film of lithium battery as well as preparation and application of adhesive resin

A technology of adhesives and aluminum-plastic films, applied in adhesives, secondary batteries, battery pack parts, etc., to meet application performance requirements, excellent hydrolysis resistance, and improve flexibility

Inactive Publication Date: 2020-12-29
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The peel strength of the inner layer of aluminum-plastic film (Al-CPP) prepared with this adhesive can reach more than 10, but the peel strength of the outer layer adhesive (Al-PA) is only 6-8N / 15mm, and the drawing depth can reach 5mm

Method used

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  • Adhesive resin for outer layer of aluminum-plastic film of lithium battery as well as preparation and application of adhesive resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Add 580.5 grams of terephthalic acid, 720.6 grams of isophthalic acid, 317.0 grams of sebacic acid, 496 grams of ethylene glycol, 128.1 grams of 1,6-hexanediol, 6.5 grams of 3-methylpentane into a 3L polymerization reactor Diol, 1.0 g of antimony acetate catalyst, heat up to 240°C within about one hour, adjust the distillation rate of the generated water, keep the pressure in the kettle at 0.2-0.3MPa, and the temperature of the top of the water distillation tower is lower than 140°C until the amount of distilled water Reach 170 grams, complete esterification reaction. Turn on the vacuum system, adjust the vacuum in the kettle to about 40-80Pa for about half an hour, and at the same time, the temperature rises to 275°C to start the polycondensation reaction, react under this condition for 2.5 hours, and discharge to obtain carboxyl-terminated polyester.

[0033] The polyester obtained above was tested by GPC to have a molecular weight Mn of 7800, an acid value of 13.9 mgK...

Embodiment 2

[0036] Add 824.0 grams of isophthalic acid, 317.0 grams of adipic acid, 378.2 grams of ethylene glycol, 98.4 grams of 3-methyl-1,5-pentanediol, and 1.0 grams of antimony trioxide into a 3L polymerization reactor, within about one hour Raise the temperature to 250°C, adjust the distillation rate of the generated water, keep the pressure in the kettle at 0.25-0.3MPa, and keep the temperature at the top of the distillation tower below 120°C until the amount of distilled water reaches 90 grams to complete the esterification reaction. Turn on the vacuum system, adjust the vacuum in the kettle to about 60Pa for about half an hour, and at the same time, the temperature rises to 280°C to start the polycondensation reaction, react under this condition for 3 hours, and discharge to obtain carboxyl-terminated polyester.

[0037] The polyester obtained above was tested by GPC to have a molecular weight Mn of 8600, an acid value of 12.80 mgKOH / g, and a hydroxyl value of 0.28 mgKOH / g.

[00...

Embodiment 3

[0040] Add 580.5 grams of phthalic acid, 720.6 grams of isophthalic acid, 217.0 grams of adipic acid, 612.4 grams of 1,2-propylene glycol, 128.1 grams of 1,4-butanediol, and 6.5 grams of trimethylol in a 3L polymerization reactor Propane, 1.0g of antimony acetate, heat up to 260°C in about one hour, adjust the distillation rate of the generated water, keep the pressure in the kettle at 0.25-0.3MPa, keep the temperature at the top of the distillation tower below 120°C, until the distilled water reaches 165g , to complete the esterification reaction. Turn on the vacuum system, adjust the vacuum in the kettle to about 145Pa for about half an hour, and at the same time, the temperature rises to 275°C to start the polycondensation reaction, react under this condition for 2.5 hours, and discharge to obtain carboxyl-terminated polyester.

[0041] The polyester obtained above was tested by GPC to have a molecular weight Mn of 5200, an acid value of 21.2 mgKOH / g, and a hydroxyl value o...

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Abstract

The invention belongs to the field of organic synthesis, and relates to a macromolecular polymerization technology, in particular to adhesive resin for an outer layer of an aluminum-plastic film of alithium battery as well as preparation and application of the adhesive resin. The adhesive resin for the aluminum-plastic film of the lithium battery is solvent-type bi-component adhesive resin and iscomposed of polyhydroxy epoxy chain-extended polyester serving as a component A and polyisocyanate serving as a component B, wherein the mass ratio of the component A to the component B is 1: 2-20: 1. The prepared adhesive is used for bonding metal aluminum foil, a PA film and a PP film, and the prepared aluminum-plastic film has high flexibility, tensile resistance, hydrolysis resistance, heat resistance, cohesiveness and impact resistance. The adhesive product prepared by the invention can completely meet the application performance requirements of the lithium battery aluminum-plastic filmadhesive.

Description

technical field [0001] The invention belongs to the field of organic synthesis and relates to a technology of polymer polymerization, in particular to an adhesive resin for the outer layer of an aluminum-plastic film of a lithium battery and its preparation and application. Background technique [0002] Lithium-ion batteries have developed rapidly because of their excellent performance since their inception. The packaging of lithium battery cells involves relatively stringent physical and mechanical and chemical compatibility, resistance, barrier properties, electrochemical reactivity and other requirements during its use. These demanding indicators are related to the performance of the interlayer adhesive. direct relation. The current commercially available aluminum-plastic film products for soft-pack lithium batteries usually have at least three layers. The inner substrate is a non-toxic polyolefin (PP, PE, etc.) Composite with different types of adhesive additives. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/42C08G63/91C08G63/183C08G63/181C08G63/86C08G63/78H01M2/02H01M10/0525B82Y30/00B32B7/12B32B15/085B32B15/088B32B15/20B32B27/32B32B27/06B32B27/34B32B33/00
CPCC09J175/06C08G18/4294C08G63/916C08G63/183C08G63/181C08G63/866C08G63/78H01M10/0525B82Y30/00B32B7/12B32B15/20B32B15/088B32B27/06B32B27/34B32B27/32B32B15/085B32B33/00B32B2307/558Y02E60/10
Inventor 付洪娥王新王玉灿李致轩魏田鲁琴刘博
Owner SHENYANG RES INST OF CHEM IND
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