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A high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film composite

A technology of polyester resin and aluminum-plastic film, applied in the direction of adhesives, etc., can solve the problems of high imported resin prices and compressed profit margins, and achieve good composite fastness and high yield

Active Publication Date: 2022-03-25
SHANGHAI WEIKAI CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high price of imported resin represented by Japanese companies has reduced the profit margins of downstream local companies in my country, and may also be coerced by relevant trade policies

Method used

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  • A high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film composite
  • A high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film composite
  • A high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment relates to a high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film compounding. The raw materials of the polyester resin include the following components in weight percentage: 16.44% terephthalic acid, isophthalic acid 13.15%, sebacic acid 36.17%, ethylene glycol 32.89%, 2,2,4-trimethyl-1,3-pentanediol 1.32% and dihydroxybutyltin chloride 0.03%.

[0035] Concrete synthesis comprises the following process steps:

[0036] (1) Put 25kg terephthalic acid, 20kg isophthalic acid, 55kg sebacic acid, 50kg ethylene glycol, 2Kg 2,2,4-trimethyl-1,3-pentanediol into the reaction kettle Stir and heat at 130°C. After the material is melted, add 45g of dihydroxybutyl tin chloride, and gradually raise the temperature to 250°C for reaction. When it is measured that the lactonization rate in the kettle is >94%, start vacuuming at a constant temperature of 240°C, and gradually increase the vacuum until the hydroxyl value of the mater...

Embodiment 2

[0069] This embodiment relates to a high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film compounding. The raw materials of the polyester resin include the following components in weight percentage: dimethyl terephthalate 13%, m- Phthalic acid 12%, azelaic acid 42%, 1,4-butanediol 31%, 2-methyl-2,4-pentanediol 1.99% and monobutyltin triisooctoate 0.01%.

[0070] Concrete synthesis comprises the following process steps:

[0071] (1) 19.5kg dimethyl terephthalate, 18kg isophthalic acid, 63kg azelaic acid, 46.5kg 1,4-butanediol, 2.99Kg 2-methyl-2,4-pentanediol, Throw it into a reaction kettle and heat it with stirring at a temperature of 120°C. After the material was dissolved, 15 g of tin monobutyl triisooctoate was added, and the temperature was gradually raised to 240° C. for reaction. When it is measured that the lactonization rate in the kettle is >94%, start vacuuming at a constant temperature of 240°C, and gradually increase the vacu...

Embodiment 3

[0076] This embodiment relates to a high-toughness stamping-resistant polyester resin for lithium battery aluminum-plastic film compounding. The raw materials of the polyester resin include the following components in weight percentage: dimethyl terephthalate 35%, nonyl Diacid 32%, Ethylene Glycol 31.95%, 2-Butyl-2-Ethyl-1,3-Propanediol 1%, and Zinc Oxalate 0.05%.

[0077] Concrete synthesis comprises the following process steps:

[0078] (1) Put 52.5kg dimethyl terephthalate, 48kg azelaic acid, 47.93kg ethylene glycol, 1.5Kg 2-butyl-2-ethyl-1,3-propanediol into the reaction kettle at 140°C Stir and heat at temperature. After the material was dissolved, 75g of zinc oxalate was added, and the temperature was gradually raised to 260°C for reaction. When it is measured that the lactonization rate in the kettle is >94%, start vacuuming at a constant temperature of 240°C, and gradually increase the vacuum until the hydroxyl value of the material in the kettle is 46±4mgKOH / g.

[...

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Abstract

The invention discloses a high-toughness stamping-resistant polyester resin for aluminum-plastic film compounding of lithium batteries; 32-42% of dibasic carboxylic acid with linear carbon chain, 31-37% of dihydric alcohol with symmetrical structure and carbon chain number ≤ 4, and 1-3% of dihydric alcohol containing more than two asymmetric alkyl groups are put into the reaction vessel Stir under medium heating; add catalyst 0.01% ~ 0.05% to heat up reaction; when the esterification rate of the material in the reaction vessel is measured to be > 94%, vacuumize, gradually increase the vacuum degree to the hydroxyl value of the material in the reaction vessel 46±4mgKOH / g; heat up to 260 Vacuum at ±5°C, gradually increase the vacuum degree to below 300Pa, and the hydroxyl value of the material in the reaction vessel is 4±0.5mgKOH / g; that is. The resin toughness related index of the present invention has advantages; the good product rate of the impact test is higher, and the deep drawing test can reach up to 15mm.

Description

technical field [0001] The invention relates to the technical field of adhesive resins, in particular to a high-toughness stamping-resistant polyester resin used for compounding aluminum-plastic films of lithium batteries. Background technique [0002] With the development of technology, lithium-ion batteries are more and more used by people due to their performance advantages such as large energy density, high output voltage, small self-discharge, and strong cycle discharge. Aluminum-plastic film has the advantages of light weight, thin thickness, and flexible shape design, and has been widely used in many fields such as 3C consumer electronics, power batteries, and energy storage. Aluminum-plastic film is an important material for packaging pouch batteries, which plays a vital role in the quality of pouch batteries and protects the contents. As the key link with the highest barriers in the lithium battery industry chain, the global aluminum-plastic film composite adhesive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/181C08G63/78C09J167/02
CPCC08G63/183C08G63/181C08G63/78C09J167/02
Inventor 董海普张钰馨王玉春
Owner SHANGHAI WEIKAI CHEM
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