Sealing material for secondary battery and sealing material composition for secondary battery

Patent metadata

Field	Value
Publication number	US-9601726-B2
Application number	US-201314416875-A
Country	US
Kind code	B2
Filing date	Sep 5, 2013
Priority date	Sep 11, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A sealing material for secondary battery contains a conjugated diene-based polymer and a cyclic olefin-based polymer. The weight ratio between the conjugated diene-based polymer and the cyclic olefin-based polymer, as expressed in (conjugated diene-based polymer/cyclic olefin-based polymer), ranges from 40/60 to 80/20, and the total amount of the diene-based polymer and the cyclic olefin-based polymer is 80 wt % or more of an entire amount.

First claim

The invention claimed is:

1. A sealing material for a secondary battery comprising:
a conjugated diene-based polymer;
a cyclic olefin-based polymer; and
a nonionic surfactant, wherein
a glass transition temperature of the conjugated diene-based polymer is −30° C. or lower,
a thermal deformation temperature of the cyclic olefin-based polymer is 80° C. or higher,
a weight ratio between the conjugated diene-based polymer and the cyclic olefin-based polymer, as expressed in (conjugated diene-based polymer/cyclic olefin-based polymer), ranges from 40/60 to 80/20, and
a total amount of the diene-based polymer and the cyclic olefin-based polymer is 80 wt % or more of an entire amount.

2. The sealing material for a secondary battery according to claim 1 , wherein the cyclic olefin-based polymer is a polymer obtained by metathesis polymerization, and has a cyclic structure in a main chain.

3. A sealing material composition for a secondary battery comprising:
the sealing material for secondary battery according to claim 1 ; and
an organic liquid material, wherein
the sealing material for secondary battery is contained in an amount of 1 to 30 wt % relative to the organic liquid material.

4. A sealing material composition for a secondary battery comprising:
the sealing material for secondary battery according to claim 2 ; and
an organic liquid material, wherein
the sealing material for secondary battery is contained in an amount of 1 to 30 wt % relative to the organic liquid material.

Assignees

• Zeon Corp

Inventors

• Maeda Kouichirou

Classifications

• C08L65/00 Primary

  Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title

• H01M50/193

  Organic material · CPC title

• C08L9/00

  Compositions of homopolymers or copolymers of conjugated diene hydrocarbons · CPC title

• C08G2261/3325

  derived from other polycyclic systems · CPC title