Vinylidene-fluoride-based copolymer and application of said copolymer

一种二氟乙烯、类共聚物的技术，应用在1领域，能够解决金属箔粘接性不充分等问题，达到剥离强度优异、粘接性优异、生产率良好的效果

Active Publication Date: 2013-08-21
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, even with these polymers, the adhesion to metal foil is still insufficient

Method used

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  • Vinylidene-fluoride-based copolymer and application of said copolymer
  • Vinylidene-fluoride-based copolymer and application of said copolymer
  • Vinylidene-fluoride-based copolymer and application of said copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] Polymerization was carried out by the following method to obtain a 1,1-vinylidene fluoride copolymer in the form of polymer powder.

[0146] Into an autoclave with an inner capacity of 2 liters, 900 g of ion-exchanged water, 0.4 g of Metolose 90SH-100 (manufactured by Shin-Etsu Chemical Co., Ltd.), 0.2 g of carboxyethyl acrylate, and 50% by weight of peroxide were charged into an autoclave with an inner capacity of 2 liters. 2.0 g of tert-butyl valerate-Flon 225cb solution and 396 g of 1,1-difluoroethylene were heated to 50° C. over 2 hours.

[0147] Thereafter, while maintaining 50° C., a 15 g / l carboxyethyl acrylate aqueous solution was slowly added at a constant polymerization pressure. A total of 4.0 g of carboxyethyl acrylate was added including the amount added initially.

[0148] The polymerization was stopped at the same time as the addition of the carboxyethyl acrylate aqueous solution was completed, and the temperature was raised for a total of 8.6 hours.

...

Embodiment 2、3

[0167] Except changing the concentration and addition amount of the carboxyethyl acrylate aqueous solution, the addition amount of the initiator, and the polymerization conditions as shown in Table 1, it was performed in the same manner as in Example 1 to obtain a polymer powder. For the yield of polymer, embodiment 2 is 71%, embodiment 3 is 25%, for the inherent viscosity of gained polymer, embodiment 2 is 3.15dl / g, embodiment 3 is 2.65dl / g, For the absorbance ratio of the obtained polymer (A R ), embodiment 2 is 0.70, and embodiment 3 is 2.57.

[0168] Measure the content of above-mentioned polymer powder with the method identical with embodiment 1 1 H NMR spectrum and 19 F NMR spectrum. Same as Example 1 by 1 The integrated intensity of the H NMR spectrum was used to obtain the VDF amount and the CEA amount of the polymer. In addition, similarly to Example 1, by 19 The amount of polymer chains derived from carboxyethyl acrylate was determined from the F NMR spectrum, ...

Embodiment 2

[0169] The 1,1-difluoroethylene-based copolymer obtained in Example 2 had a VDF amount of 99.39 mol%, a CEA amount of 0.61 mol%, and an amount of polymer chains derived from carboxyethyl acrylate of 0.38 mol%. The yield was 62%, the VDF amount of the 1,1-difluoroethylene-based copolymer obtained in Example 3 was 97.28 mol%, the CEA amount was 2.72 mol%, and the amount of polymer chains derived from carboxyethyl acrylate was 1.41 mol%. Mole%, the random rate is 52%.

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Abstract

The objective of the present invention is to provide: a vinylidene-fluoride-based copolymer having adhesiveness to metal foils that is superior to that of conventional vinylidene-fluoride-based copolymers; and an application of the vinylidene-fluoride-based copolymer. The vinylidene-fluoride-based copolymer is obtained by the copolymerization of vinylidene fluoride and the compound represented by formula (A). In formula (A): R1, R2, and R3 each independently is a hydrogen atom, a chlorine atom, or an alkyl group; and X is a heteroatom or a group of atoms that has a molecular weight of no greater than 500, contains a heteroatom, and has a primary chain configured from 1-20 atoms.

Description

technical field [0001] The present invention relates to 1,1-difluoroethylene-based copolymers and uses of the copolymers. Specifically, the present invention relates to vinylidene fluoride copolymers, binders for battery electrodes, electrode mixtures for nonaqueous electrolyte secondary batteries, electrodes for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary batteries. Battery. Background technique [0002] In recent years, the development of electronic technology has been amazing, and various devices have been miniaturized and lightened. Complementing the miniaturization and weight reduction of the electronic equipment, the miniaturization and weight reduction of the battery used as the power source is required. Nonaqueous electrolyte secondary batteries using lithium are being used as batteries capable of obtaining large energy with a small volume and mass. In addition, the use of non-aqueous electrolyte secondary batteries as power so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F214/22C09D127/16H01M4/62
CPCC08F214/225C09D127/16H01M4/623H01M10/052H01M2220/20Y02E60/10C08F214/22C08F220/00C08L27/16H01M4/62Y02T10/70Y02P70/50
Inventor 渡边圭介堺勇树菅原绘美武藤慎太郎五十岚民人
Owner KUREHA KAGAKU KOGYO KK
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