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Polyolefin-based adhesive composition

A composition and adhesive technology, applied in the direction of hydrocarbon copolymer adhesives, graft polymer adhesives, polyurea/polyurethane adhesives, etc., can solve the problem of reduced lamination strength, electrolyte leakage, Corrosion barrier and other issues, to achieve excellent heat resistance and soft package expansion resistance, good adhesion and electrolyte resistance, excellent processing characteristics

Pending Publication Date: 2020-11-10
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If such a strong penetrating solvent passes through the sealant layer, the lamination strength between the barrier layer and the sealant layer will decrease, delamination will occur, and eventually problems such as electrolyte leakage will occur
In addition, LiPF6, LiBF4 and other substances are used as the electrolyte of the battery, but these salts generate hydrofluoric acid and hydrogen due to the hydrolysis reaction with water. Hydrofluoric acid will corrode the barrier layer, which will reduce the strength of the laminate

Method used

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  • Polyolefin-based adhesive composition
  • Polyolefin-based adhesive composition
  • Polyolefin-based adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0091] The following examples are given to describe the present invention in more detail. It is just that the present invention is not limited to the examples.

[0092]

[0093] The acid value (mgKOH / g) in the present invention is the amount of KOH required to neutralize 1 g of the acid-modified resin, and is measured based on the JIS K0070 (1992) test method. Specifically, 1 g of modified polyolefin (A) or thermoplastic resin (B) was dissolved in 100 g of xylene whose temperature was adjusted to 100 ° C, and then, at the same temperature, phenolphthalein was used as an indicator, and 0.1 mol / L Potassium hydroxide ethanol solution [trade name "0.1 mol / L ethanolic potassium hydroxide solution", manufactured by Wako Pure Chemical Industries, Ltd.] was titrated. At this time, the amount of potassium hydroxide required for titration was converted into mg to calculate the acid value (mgKOH / g).

[0094]

[0095] The weight-average molecular weight in the present invention utiliz...

manufacture example 1

[0131] 100 parts by mass of propylene-1-butene copolymer (melting point 95°C, propylene / 1-butene=85 / 15 (molar ratio)), 233 parts by mass of toluene and 20 parts by mass of maleic anhydride were added to a 1L autoclave. 5 parts by mass of di-tert-butyl peroxide. It heated while stirring, and reacted at 140 degreeC for 1 hour. After cooling the obtained reaction liquid to 100 degreeC, it poured into the container which contained 950 mass parts of methyl ethyl ketones, stirring, and cooled to 25 degreeC, and resin-precipitated. The slurry containing the resin was centrifuged to separate the acid-modified propylene-1-butene copolymer graft-polymerized with maleic anhydride, (poly) maleic anhydride and low molecular weight substances.

[0132] Further, the acid-modified propylene-1-butene copolymer separated by centrifugation was put into a container containing 2000 parts by mass of new methyl ethyl ketone previously kept at 25°C while stirring. , and continue stirring for 1 hour...

manufacture example 2

[0135] In addition to changing the propylene-1-butene copolymer used in Production Example 1 to a propylene-1-butene copolymer (melting point 80° C., propylene / 1-butene=80 / 20 (molar ratio)), In the same manner as in Production Example 1, a maleic anhydride-modified propylene-1-butene copolymer (A-2, acid value 25 mgKOH / g, weight average molecular weight 60,000, melting point 80°C, ΔH56J / g).

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Abstract

The invention provides an adhesive composition which is capable of bonding and aging at low temperature and has excellent adhesion, electrolyte resistance, heat resistance, durability, and moldability. This adhesive composition has a sea-island structure in which a reactant of a modified polyolefin (A) and a curing agent (C) is contained in a sea area, and a reactant of a thermoplastic resin (B) and the curing agent (C) is contained in an island area.

Description

technical field [0001] The present invention relates to an adhesive composition, a laminate, and a packaging material for lithium ion batteries. Background technique [0002] In recent years, lithium-ion batteries capable of being ultra-thin and miniaturized have been actively developed as batteries for portable terminal devices such as personal computers and mobile phones, video cameras, satellites, and the like. The packaging material of this lithium-ion battery is different from the metal cans used in the past. Due to the advantages of light weight and freedom to choose the shape of the battery, a laminated body consisting of a substrate layer / barrier layer / sealant layer is gradually beginning to be used. . [0003] Lithium-ion batteries contain positive electrode materials and negative electrode materials, as well as electrolytes obtained by dissolving lithium salts in aprotic solvents such as propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/26B32B15/08B32B27/32C09J125/08C09J163/00C09J175/04C09J201/00H01M2/02H01M50/105
CPCC09J123/26C09J11/06C09J11/08B32B15/085B32B27/32H01M50/105H01M50/124H01M50/129H01M50/136H01M10/0525C08L2201/08C08L2203/20C08L25/08C08L63/00C08K5/29C09J163/00C09J175/04C09J201/00C09J151/06C08G18/792C08G18/6204C08F255/02C08L51/06H01M50/121B32B2307/748B32B7/12B32B15/18B32B2479/00B32B2250/02B32B2307/54B32B2307/714B32B2419/00B32B2439/46B32B15/20B32B2605/00B32B2457/10Y02E60/10C08L53/025C08F222/06C08L23/10C09J125/08C08K5/1515C09J7/30B32B15/08C09J2301/312C09J2203/33
Inventor 坂田秀行冈野祥平中岛桃子
Owner TOYOBO CO LTD
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