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A kind of fluorine-containing copolymer, its preparation method and two-component polyurethane adhesive containing it

A two-component polyurethane and adhesive technology, which is applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problem of improved bonding performance between adhesive and polypropylene, low heat resistance, and attenuation of adhesive force Large and other problems, achieve good electrolyte corrosion resistance and heat resistance, improve strength, and good bonding performance

Active Publication Date: 2021-09-24
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat resistance temperature of this two-component polyurethane adhesive is about 120°C, the heat resistance is still low, and the adhesion force decays greatly after soaking in the electrolyte, and it is mainly used for the adhesion between aluminum foil and nylon film. Adhesive bond performance to polypropylene has not been improved

Method used

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  • A kind of fluorine-containing copolymer, its preparation method and two-component polyurethane adhesive containing it
  • A kind of fluorine-containing copolymer, its preparation method and two-component polyurethane adhesive containing it
  • A kind of fluorine-containing copolymer, its preparation method and two-component polyurethane adhesive containing it

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0056] Preparation of fluorinated copolymers:

[0057] 5 parts by weight of trifluoroethyl acrylate, 100 parts by weight of hydroxyethyl acrylate, 5 parts by weight of vinyl acetate, 1 part by weight of chain transfer agent cumyl dithiobenzoate and 1 part by weight of azobisisobutyronitrile Dissolved in 500 parts by weight of N,N-dimethylformamide; after the reaction device was sealed, it underwent three cycles of freezing-vacuumizing-thawing-nitrogen to ensure that the reaction was carried out under anhydrous and oxygen-free conditions, and then React at 80° C. for 36 hours; after the reaction is terminated, the reaction solution is concentrated under reduced pressure at 100° C. to obtain a fluorine-containing copolymer, and the product yield is about 90%.

[0058] The product was tested by gel permeation chromatography, and its number average molecular weight was 10000, and its PDI (polydispersity index) was 1.13.

[0059] The product can be analyzed by infrared: 1000~1400c...

preparation example 2

[0062] Preparation of fluorinated copolymers:

[0063] 10 parts by weight of 2,2,3,3,3-pentafluoropropyl methacrylate, 100 parts by weight of hydroxyethyl methacrylate, 6.6 parts by weight of vinyl acetate, 1 part by weight of cumyl dithiobenzoate and 1 weight part of azobisisobutyronitrile are dissolved in 500 weight parts of N,N-dimethylformamide; after the reaction device is sealed, it goes through three cycles of freezing-vacuumizing-thawing-nitrogen to ensure The reaction is carried out under anhydrous and oxygen-free conditions, and then reacted at 80° C. for 36 hours; after the reaction is terminated, the reaction solution is concentrated under reduced pressure at 100° C. to obtain a fluorine-containing copolymer, and the product yield is about 90%.

[0064] The product was tested by gel permeation chromatography, and its number average molecular weight was 12430, and its PDI was 1.14.

preparation example 3

[0066] Preparation of fluorinated copolymers:

[0067] 25.3 parts by weight of dodecafluoroheptyl methacrylate, 100 parts by weight of 5-hydroxypentyl-acrylate, 8.2 parts by weight of vinyl acetate, 1 part by weight of cumyl dithiobenzoate and 1 part by weight of azo Diisobutyronitrile is dissolved in 500 parts by weight of N,N-dimethylformamide; after the reaction device is sealed, it undergoes three cycles of freezing-vacuumizing-thawing-nitrogen to ensure that the reaction is carried out under anhydrous and oxygen-free conditions , then reacted at 80°C for 36 hours; after the reaction was terminated, the reaction solution was concentrated under reduced pressure at 100°C to obtain a fluorine-containing copolymer, and the product yield was about 90%.

[0068] The product was tested by gel permeation chromatography, and its number average molecular weight was 19765, and its PDI was 1.19.

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Abstract

The invention provides a fluorine-containing copolymer, a preparation method thereof and a two-component polyurethane adhesive containing the same. The fluorine-containing copolymer is a copolymerization product of a fluorine-containing acrylate monomer, a hydroxy acrylate monomer and a vinyl acetate monomer, and has a structure shown in formula I. The two-component polyurethane adhesive includes A component and B component with a mass ratio of 1-4:1; wherein A component includes the following components in parts by weight: 100 parts of hydroxyl resin, 10 parts of the above-mentioned fluorine-containing copolymer 30 parts and catalyst 0.01-5 parts; B component includes isocyanate curing agent. The fluorine-containing copolymer provided by the present invention can be used as a component of a two-component polyurethane adhesive to improve its strength, electrolyte corrosion resistance, heat resistance and bonding performance to polypropylene, and the obtained two-component polyurethane adhesive can be used for The bonding of the aluminum-plastic film of the pouch battery is especially used for the bonding of the polypropylene layer and the aluminum foil layer in the aluminum-plastic film of the pouch battery.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a fluorine-containing copolymer, a preparation method thereof and a two-component polyurethane adhesive containing the same. Background technique [0002] With the continuous growth of the three major markets of electronic consumption, new energy vehicles and energy storage, lithium-ion batteries have ushered in huge development opportunities. Among them, the pouch battery has broad development prospects in the field of power batteries due to its high energy density. At the same time, aluminum-plastic film, as an important component material of pouch battery, will also develop rapidly in the future. [0003] The aluminum-plastic film is generally divided into three layers, including an electrolyte-resistant polypropylene inner layer (heat-seal layer), a waterproof and air-permeable aluminum foil middle layer, and a nylon outer layer (protective layer). All three l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/20C08F220/24C08F218/08C08F2/38C09J175/04C09J175/08C08G18/62
CPCC08F2/38C08F220/20C08F2438/03C08G18/6279C09J175/04C09J175/08C08F220/24C08F218/08
Inventor 宋骏唐龙陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND