1,1-Difluoroethylene-based copolymer, and use of the copolymer

A kind of copolymer, vinyl difluoride technology, applied in 1 field, can solve problems such as insufficient adhesion, achieve excellent adhesion and excellent peel strength

Active Publication Date: 2015-09-23
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, even the above-mentioned polymers have insufficient adhesion to substrates such as metals.

Method used

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  • 1,1-Difluoroethylene-based copolymer, and use of the copolymer
  • 1,1-Difluoroethylene-based copolymer, and use of the copolymer
  • 1,1-Difluoroethylene-based copolymer, and use of the copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] (Manufacture of 1,1-difluoroethylene-based copolymer (1))

[0153] In the 500ml three-neck flask with Dimrot cooling tube, dropping funnel and magnetic stirrer, add the carboxyl-containing 1,1-difluoroethylene copolymer (X1) made in 10.1g comparative example 1 and 150ml of N-methylpyrrolidone (NMP) and dissolved.

[0154] At room temperature, 5.30 g (0.0445 mol) of thionyl dichloride was dripped into the obtained solution, and after completion|finish of dripping, it heated and stirred at 80 degreeC for 1.5 hours.

[0155] After completion of heating and stirring, let cool to room temperature, add 4.34 g (0.0456 mol) of 3-hydroxypyridine, and further heat and stir at 90 for 1.5 hours.

[0156] After heating and stirring, the polymer was recovered by reprecipitation using a water / methanol mixed solvent as a poor solvent.

[0157] The inherent viscosity of the obtained vinylidene fluoride copolymer (1) was 2.07 dl / g.

[0158] In addition, measured under the same conditi...

Embodiment 2

[0163] (Manufacture of 1,1-difluoroethylene-based copolymer (2))

[0164] It was synthesized in the same manner as in Example 1, except that 3-hydroxypyridine in Example 1 was changed to 2-(2-thienyl)ethanol.

[0165] The inherent viscosity of the obtained vinylidene fluoride copolymer (2) was 2.11 dl / g.

[0166] In addition, measured under the same conditions as Comparative Example 1 1 It was confirmed by H NMR spectrum that 74 mol% of the carboxyl groups in the carboxyl group-containing vinylidene fluoride copolymer (X1) produced in Comparative Example 1 was esterified. It should be noted that the 1,1-difluoroethylene-based copolymer (2) 1 H NMR spectrum is shown in figure 2 . Confirmation of the above-mentioned esterification rate is based on the integrated intensity of 1.84 of the peak derived from the three hydrogen atoms of the thiophene ring observed around 6.5 to 7.5 ppm and the peak derived from -C(O)O-CH observed around 4.2 ppm. 2 - The integral intensity of th...

Embodiment 3

[0171] (Manufacture of 1,1-difluoroethylene-based copolymer (3))

[0172] It was synthesized in the same manner as in Example 1, except that 3-hydroxypyridine in Example 1 was changed to 2-(methylthio)ethanol.

[0173] The inherent viscosity of the obtained vinylidene fluoride copolymer (3) was 2.04 dl / g.

[0174] In addition, measured under the same conditions as Comparative Example 1 1 It was confirmed by H NMR spectrum that 79 mol% of the carboxyl groups in the carboxyl group-containing vinylidene fluoride copolymer (X1) prepared in Comparative Example 1 were esterified. It should be noted that the 1,1-difluoroethylene-based copolymer (3) 1 H NMR spectrum is shown in image 3 . Confirmation of the above-mentioned esterification rate was obtained from -S-CH observed around 2.1ppm 3 The integrated intensity of the peak of the methyl group of the structure is 1.88, and the -C(O)O-CH observed around 4.2ppm 2 - The integral intensity of the methylene peak of the structure ...

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Abstract

PURPOSE: A fluoride vinylidene-based copolymer with superior adhesive force with a substrate and uses of the copolymers are provided to enhance adhesive force with substrates and release strength of current collector and compound layer. CONSTITUTION: A fluoride vinylidene-based copolymer has 80-99.95 mol% of component represented by chemical formula a, 0-19.99 mol% of component represented by chemical formula b, and 0.01-20 mol% of component represented by chemical formula c. In the chemical formula b, RCOOH is an organic group containing carboxy group, R^1, R^2, and R^3 are respectively hydrogen, halogen, and carboxyl group or the derivative, or C1-5 alkyl group. In a general equation c, R_(N,S) is an organic radical containing one or more hetero atoms, R^4, R^5, and R^6 are respectively hydrogen, halogen, carboxyl group or the derivative, or C1-5 alkyl group.

Description

technical field [0001] The present invention relates to 1,1-difluoroethylene-based copolymers and uses of the copolymers. Specifically, it relates to a vinylidene fluoride-based copolymer, a binder for electrode batteries, an electrode mixture for nonaqueous electrolyte secondary batteries, an electrode for nonaqueous electrolyte secondary batteries, and a nonaqueous electrolyte secondary battery. Background technique [0002] Polyvinylidene fluoride (hereinafter also referred to as PVDF), which is a polymer of 1,1-vinylidene fluoride (hereinafter also referred to as VDF), is excellent in chemical resistance, weather resistance, stain resistance, etc., After melt molding, it can be used as a material for producing various films and molded products. In addition, PVDF can also be used as a resin for coatings or adhesives, but since PVDF has low bonding strength with substrates such as metals, improvement of the bonding strength is desired. [0003] Conventionally, various me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F214/22C08F220/28C08F8/34C08F8/30H01M4/62
CPCY02E60/122Y02E60/10Y02P70/50C08F8/20C08F8/30C08F8/34C08F214/22C08F220/26H01M4/13H01M4/139H01M4/62
Inventor 佐藤圭介
Owner KUREHA KAGAKU KOGYO KK
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