A kind of glue for lithium battery aluminum-plastic film outer layer and synthesis method thereof

A technology of glue and synthesis method for the outer layer, applied in the direction of adhesives, etc., can solve the problems of difficult to control the reaction speed, uneven molecular distribution, wide molecular weight distribution, etc., and achieve reasonable molecular weight distribution, simple and easy to control operation process, and high application performance stable effect

Active Publication Date: 2022-07-26
SHENYANG RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively speaking, the reactivity of the carboxyl group and the epoxy group is higher, and the required reaction temperature is also lower, which makes it difficult to control the reaction speed of the two groups during the reaction process. If the material distribution is uneven, it is very easy to The molecular weight distribution is too wide and the molecular distribution is uneven, which may even lead to the problem that it is difficult to dissolve in the subsequent reaction or processing.

Method used

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  • A kind of glue for lithium battery aluminum-plastic film outer layer and synthesis method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] Add 461.1g of 99% 1,2-propanediol, 407.3g of 99% 1,7-pimelic acid and 422.5g of 99% terephthalic acid into the 2.5L esterification kettle, then add 1.3g of triphenyl phosphite and 0.4g of Antimony oxide, after replacing the reaction system with nitrogen, heated up to 90°C, when the solid material was melted, started stirring, and heated up to the esterification reaction temperature of 170°C at a speed of 40°C / h, carried out a heat preservation reaction for 2h, and then added 34.6g of 99% The maleic anhydride was heated to 200°C and continued to react for 3h, the reaction material was transferred to a decompression reactor, the temperature was controlled to 130°C, 21.2g bisphenol A epoxy resin E44 and 0.4g triethanolamine were added, and the absolute pressure was 20KPa. The ring-opening reaction was carried out for 3h under the following conditions, and when the stirring power of the reactor reached 63-65W, the pressure of the reactor was restored to normal pressure with ...

Embodiment 2

[0037] Add 429.9g 99% ethylene glycol, 384.0g 99% 1,5-glutaric acid and 482.9g99% isophthalic acid into the 2.5L esterification kettle, and then add 0.9g tetra(3,5-di-tert-butyl) -4-Hydroxyhydrocinnamic acid) pentaerythritol ester and 0.7 g of zinc isooctanoate, after replacing the reaction system with nitrogen, the temperature is raised to 90 ° C, when the solid material is melted, the stirring is started, and the temperature is raised to the esterification reaction at a speed of 30 ° C / h The temperature was 180°C, the reaction was kept for 3h, then 59.8g of 99% phthalic anhydride was added, the temperature was raised to 210°C and the reaction was continued for 4h, the reaction material was transferred to the decompression reactor, the temperature was controlled to 110°C, and 10.8g of 1,4-butanediol was added. Diglycidyl ether and 0.3g dimethylethanolamine were subjected to a ring-opening reaction at 30KPa absolute pressure for 4h. When the stirring power of the reactor reache...

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Abstract

The invention belongs to the field of polymer material synthesis, and in particular relates to a lithium battery aluminum-plastic film outer layer glue and a synthesis method thereof. The aliphatic diol and aliphatic and aromatic dibasic acids are mixed for esterification reaction. When the hydroxyl value: acid value in the product is 8 to 35:1, acid anhydride is added for acylation, and then under the action of epoxy compound and catalyst The ring-opening reaction is carried out to obtain a regular high-molecular polymer with a more uniform distribution of each functional structural segment in the molecular chain and a molecular weight of 20,000-50,000. The invention has mild reaction conditions, stable product quality and application performance, good product strength and flexibility, excellent tensile properties, and good hydrolysis resistance, adhesion and impact resistance. The adhesive for the outer layer prepared by the invention can meet the application performance requirements of the aluminum-plastic film of the lithium battery.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a lithium battery aluminum-plastic film outer layer glue and a synthesis method thereof. Background technique [0002] Since its inception, lithium-ion batteries have developed rapidly because of their excellent performance. The packaging of lithium battery cells involves more stringent requirements in terms of physical and mechanical properties, chemical compatibility, resistance, barrier properties, electrochemical reactivity, etc., and these harsh indicators are related to the performance of interlayer adhesives. D. Currently commercially available aluminum-plastic film products for soft-pack lithium batteries usually have at least three layers. The inner layer is a non-toxic polyolefin (PP, PE, etc.) layer. It is compounded by different kinds of adhesive additives. [0003] At present, there are only a few suppliers of aluminum-plastic film for high-en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/52C08G63/42C09J167/00
Inventor 王玉灿付洪娥李致轩王新魏田鲁琴刘博
Owner SHENYANG RES INST OF CHEM IND
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