Multilayer porous film, separator for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 14, 2017
Issued Date -
N/A
app pub date -
Jun 4, 2013
filing date -
Jun 29, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is provided a multilayer porous film that includes a covering layer formed from a coating liquid on at least one surface of a porous film. The coating liquid has high stability and coatability. The covering layer does not decrease the intrinsic high air permeability of the porous film and has high heat resistance and adhesiveness. The multilayer porous film has excellent handleability as a battery separator without causing curling. The multilayer porous film includes the covering layer on at least one surface of a porous polyolefin resin film. The covering layer is formed from a coating liquid and contains a filler and a resin binder. The multilayer porous film satisfies the following conditions 1) and 2): 1) the filler has an average circularity of 0.3 or more and less than 0.7; and 2) an acid component in the coating liquid has a first acid dissociation constant of 5 or less and has no second acid dissociation constant or a second acid dissociation constant of 7 or more in a dilute aqueous solution at 25° C.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully