US2018331339A1PendingUtilityA1

Porous membrane

66
Assignee: SUMITOMO CHEMICAL COPriority: Jul 29, 2014Filed: Jul 25, 2018Published: Nov 15, 2018
Est. expiryJul 29, 2034(~8 yrs left)· nominal 20-yr term from priority
Inventors:Toshihiko Ogata
H01M 50/451H01M 50/417H01M 50/491H01M 50/414H01M 2/166H01M 2/1686H01M 10/4235H01M 10/052H01M 2/145H01M 50/446H01M 50/403Y02E60/10Y02P70/50H01M 50/431H01M 10/0566H01M 10/0525C08J 9/26
66
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Claims

Abstract

A porous membrane is provided including a compound having a hydrophobic group and a nonionic hydrophilic group, an inorganic powder, and a binder resin.

Claims

exact text as granted — not AI-modified
1 .- 11 . (canceled) 
     
     
         12 . A porous membrane comprising a compound having a hydrophobic group and a nonionic hydrophilic group, an inorganic powder, and a binder resin, wherein a content of the inorganic powder is at least 50% by mass and 99% by mass or less based on 100% by mass of the porous membrane, and wherein the porous membrane has a mass per unit area of 4 g/m 2  to 20 g/m 2 . 
     
     
         13 . The porous membrane according to  claim 12 , wherein the compound having a hydrophobic group and a nonionic hydrophilic group is a nonionic surfactant. 
     
     
         14 . The porous membrane according to  claim 12 , wherein the inorganic powder is a metal oxide, a meal hydroxide, or a metal carbonate. 
     
     
         15 . The porous membrane according to  claim 12 , wherein the nonionic hydrophilic group has a polyoxyethylene structure. 
     
     
         16 . The porous membrane according to  claim 12 , wherein the binder resin is a water-soluble resin. 
     
     
         17 . The porous membrane according to  claim 12 , wherein the binder resin is a cellulose ether. 
     
     
         18 . The porous membrane according to  claim 12 , wherein the hydrophobic group is a hydrocarbon group. 
     
     
         19 . The porous membrane according to  claim 12 , wherein a content of the compound having a hydropobic group and a nonionic hydrophilic group in the porous membrane is 0.05 to 10 parts by mass with respect to 100 parts by mass of the inorganic powder. 
     
     
         20 . The porous membrane according to  claim 12 , wherein a thickness of the porous membrane is 0.1 μm to 20 μm. 
     
     
         21 . The porous membrane according to  claim 12 , wherein the porous membrane has a porosity of 20% by volume to 80% by volume. 
     
     
         22 . The porous membrane according to  claim 12 , wherein the porous membrane has an air permeability of 30 sec/100 cc to 1000 sec/100 cc. 
     
     
         23 . The porous membrane according to  claim 12 , wherein the porous membrane has a moisture content of less than 0.15% by mass. 
     
     
         24 . The porous membrane according to  claim 12 , wherein the hydrophobic group contains a fluorocarbon group. 
     
     
         25 . The porous membrane according to  claim 12 , wherein the hydrophobic group contains silicon. 
     
     
         26 . The porous membrane according to  claim 12 , wherein the binder resin is a fluorine-containing resin or fluorine-containing rubber. 
     
     
         27 . The porous membrane according to  claim 12 , wherein the porous membrane contains pores having pore diameter of 3 μm or less.

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