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Polyolefin-based adhesive composition

A composition and adhesive technology, applied in the direction of grafted polymer adhesives, adhesive types, polymer adhesive additives, etc., can solve the reduction of lamination strength, electrolyte leakage, corrosion barrier, etc. problems, to achieve the effect of low heat shrinkage effect, good adhesion and chemical resistance, excellent adhesion and chemical resistance

Active Publication Date: 2021-06-11
TOYO TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When such a strong penetrating solvent passes through the sealant layer, the lamination strength between the barrier layer and the sealant layer decreases and delamination occurs, which eventually leads to problems such as electrolyte leakage
In addition, LiPF is used as the lithium salt of the battery electrolyte 6 、LiBF 4 and other substances, but these salts will produce hydrofluoric acid due to hydrolysis reaction with water, which will corrode the barrier layer, thereby reducing the laminate strength

Method used

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

Examples

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Embodiment

[0083]Examples are given below to illustrate the present invention in more detail. However, this invention is not limited to an Example.

manufacture example 1

[0086] Add 100 parts by mass of propylene-butene copolymer (Tm: 80°C), 233 parts by mass of toluene, 20 parts by mass of maleic anhydride, and 5 parts by mass of di-tert-butyl peroxide into a 1L autoclave, and heat up to 140°C , and further stirred for 1 hour (herein, referred to as "reaction" for 1 hour). Then, after cooling the obtained reaction liquid to 100° C., it was poured into a container previously heated to 40° C. containing 717 parts by mass of toluene and 950 parts by mass of methyl ethyl ketone while stirring, cooled to 40° C., and further stirred for 30 minutes. Further cooling to 25° C. precipitates a resin (here, the operation of pouring the reaction liquid into a solvent such as methyl ethyl ketone while stirring, and cooling to deposit a resin is called “reprecipitation”). Then, by centrifuging the slurry containing the resin, the acid-modified propylene-butene copolymer graft-polymerized with maleic anhydride was separated from (poly)maleic anhydride and low...

manufacture example 2

[0090] The propylene-butene copolymer (Tm: 80°C) used in Production Example 1 was changed to a propylene-butene copolymer (Tm: 90°C), the number of repulping was changed to one, and the amount of methyl ethyl ketone added during repulping The amount of is changed to 1000 mass parts, except that, carry out similarly with manufacture example 1, obtain the maleic anhydride modified propylene-butene copolymer (PO-2, acid value 25mgKOH / g resin of acid-modified polyolefin) , weight average molecular weight 60,000, Tm90°C).

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Abstract

[Problem] To provide: an adhesive composition which has excellent re-solubility, adhesiveness and chemical resistance (resistance to electrolyte solution); a packaging material for batteries, which comprises an adhesive layer that is formed from this adhesive composition; and a battery which uses this packaging material. [Solution] An adhesive composition which contains (A) an acid-modified polyolefin, (B) a curing agent and (C) an organic solvent, and which is configured such that the total amount of adhering matter composed of the acid-modified polyolefin (A), the curing agent (B) and a reaction product thereof after a re-dissolution test is 200 g / m2 or less.

Description

technical field [0001] The present invention relates to an adhesive composition exhibiting good resolvability, adhesion, and chemical resistance between a polyolefin resin substrate and a metal substrate. More specifically, it relates to an adhesive composition containing an acid-modified polyolefin, a curing agent, and an organic solvent. In particular, it is related with the binder composition for lithium ion batteries (it abbreviates as LiB hereafter), and the packaging material which is a laminated body containing this binder composition. Background technique [0002] In recent years, LiB has been actively developed as batteries for portable terminal devices such as computers and mobile phones, video cameras, satellites, etc., which can be made ultra-thin and miniaturized. The packaging material for this LiB is different from the metal cans used in the past, because it has the advantages of being lightweight and can freely select the shape of the battery, and a laminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/26B32B15/085C09J11/08H01M50/124H01M50/105
CPCY02E60/10C09J151/06H01M50/121H01M50/119H01M50/124B32B7/12B32B15/18B32B15/20B32B2250/02B32B2307/732B32B2439/40B32B15/085B32B27/32B32B2457/10H01M50/105C09J123/26C09J11/08B32B27/26B32B27/38B32B27/40C09J2203/33H01M50/10
Inventor 中岛桃子坂田秀行柏原健二
Owner TOYO TOYOBO CO LTD
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