A kind of preparation method of lithium battery aluminum-plastic film outer layer adhesive

A lithium battery and aluminum-plastic film technology, applied in the direction of adhesives, etc., can solve the problems that the application properties of adhesives such as bonding, extension, and stretching are difficult to meet the performance requirements of lithium batteries for aluminum-plastic films, and achieve reasonable molecular weight distribution. Good hydrolysis resistance, good flexibility and good effect

Active Publication Date: 2021-09-28
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If only the polymer of hydroxyl compound and isocyanate is used as the adhesive, the application properties of the adhesive such as bonding, extension, and stretching are difficult to meet the performance requirements of lithium batteries for aluminum-plastic films.

Method used

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  • A kind of preparation method of lithium battery aluminum-plastic film outer layer adhesive

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Effect test

Embodiment 1

[0028]Add 181.8g99% of 1,3-butanediol and 147.5g99% of 1,6-adipic acid into the reaction flask, add 0.4g of tetrakis (3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid) For pentaerythritol ester, replace the air in the reaction system with nitrogen, then raise the temperature to 100°C under the protection of nitrogen, start stirring after the solid material melts, and raise the temperature to the esterification reaction temperature of 160°C at a speed of 30°C / h, and carry out the heat preservation reaction 2h. Then continue to slowly heat up to 210°C, add a mixture of 21.0g99% phthalic acid and 62.9g99% terephthalic acid, react for 2h, then heat up to the polycondensation reaction temperature of 270°C, add 27.4g98% trimethylol Propane, after continuing to react for 0.5h, add 0.12g of dibutyltin oxide, and carry out decompression reaction under 60Pa absolute pressure for 4h, and obtain a polymer with a target molecular weight of 22,000. Then under the reaction temperature, restore...

Embodiment 2

[0030] Add 298.0g 99% 3-methyl-1,5-pentanediol and 166.7g 99% 1,5-pentanedioic acid into the reaction flask, add 0.6g 2,4-dimethyl-6-tert-butylphenol After replacing the air in the reaction system with nitrogen, the temperature was raised to 100°C under the protection of nitrogen. After the solid material melted, stirring was started, and the temperature was raised to the esterification reaction temperature of 170°C at a rate of 30°C / h, and the heat preservation reaction was carried out for 2 hours. Then continue to slowly heat up to 220°C, add a mixture of 28.0g99% phthalic acid and 55.9g99% terephthalic acid, react for 2h, then heat up to the polycondensation reaction temperature of 260°C, add 14.1g99% glycerol, After continuing the reaction for 0.5 h, 0.26 g of zinc isooctanoate was added, and the decompression reaction was carried out at an absolute pressure of 100 Pa for 4 h to obtain a polymer with a target molecular weight of 19,000. Then under the reaction temperature,...

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Abstract

The invention belongs to the field of organic synthesis, relates to a polymer polymerization technology, and in particular relates to a method for preparing an adhesive for the outer layer of an aluminum-plastic film of a lithium battery. The aliphatic dihydric alcohol, the aliphatic dibasic acid and the aromatic dibasic acid are subjected to an esterification reaction under the action of an antioxidant in an inert gas under normal pressure; Under the action of a catalyst, the water and small molecular polymers generated by the polycondensation reaction are removed under high temperature and high vacuum conditions, and a solvent is added to the reactants to dissolve, thereby obtaining a polymer solution with a molecular weight of 10,000-30,000. The invention has simple operation process, reasonable molecular weight distribution, stable product quality and application performance, is not easy to crystallize, has good flexibility, excellent tensile performance, and has good hydrolysis resistance, cohesiveness and impact resistance. The adhesive product prepared by the invention can fully meet the application performance requirements of the aluminum-plastic film of the lithium battery for the outer layer adhesive.

Description

technical field [0001] The invention belongs to the field of organic synthesis, relates to a technology of polymer polymerization, and in particular to a method for preparing an adhesive for the outer layer of an aluminum-plastic film of a lithium battery. 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. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/20C09J167/02
Inventor 王玉灿王新付洪娥魏田鲁琴刘博宋丽凤黄月
Owner SHENYANG RES INST OF CHEM IND
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