Coating liquid composition, substrate with coating film, separator, secondary battery, and electrode material
Provided is a coating liquid composition that is less likely to deform even when heat is applied to a coating liquid for a paint mainly containing a polymer, an ink, an adhesive, and an anode, a cathode, or a separator of a lithium ion battery, for example. The coating liquid composition includes a filler, a solvent, a dispersant, and a thickener. When the coating liquid composition is applied to a substrate to form a coating film having a thickness of 0.5 to 20 μm, the coating film has a shrinkage rate of 20.0% or less when heating at 200° C. for 15 minutes.
1 . A coating liquid composition, comprising:
a filler, a solvent, a dispersant, a thickener, and a binder, wherein
the thickener is a poly-N-vinylcarboxylic acid amide,
the thickener has a viscosity of 5000 mPa·s or more and 10,000 mPa·s or less in terms of actual viscosity, and
when the coating liquid composition is applied to a substrate to form a coating film having a thickness of 0.5 to 20 μm, the coating film has a shrinkage rate of 20.0% or less when heating at 200° C. for 15 minutes.
2 . The coating liquid composition according to claim 1 , wherein the filler accounts for 20% by mass or more and 70% by mass or less of the coating liquid composition.
3 . The coating liquid composition according to claim 1 , wherein the thickener is poly-N-vinylacetamide.
4 . The coating liquid composition according claim 1 , wherein the solvent is water.
5 . The coating liquid composition according to- claim 1 , wherein the binder is an emulsion selected from an acrylic emulsion and a styrene-butadiene polymer emulsion.
6 . The coating liquid composition according to- claim 1 , wherein the substrate is a polyolefin film.
7 . The coating liquid composition according to claim 6 , wherein the polyolefin film is at least one selected from polyethylene and polypropylene.
8 . The coating liquid composition according to claim 6 , wherein the polyolefin film is a three-layer laminated film of polypropylene, polyethylene, and polypropylene.
9 . The coating liquid composition according to claim 1 , wherein a mass ratio of the filler to the thickener in the coating liquid composition is 0.1 or more and 200 or less.
10 . A substrate with a coating film, comprising a coating film formed from the coating liquid composition according to claim 1 and a substrate.
11 . A separator comprising the substrate with a coating film according to claim 10 .
12 . A secondary battery using the separator according to claim 11 .
13 . A lithium-ion secondary battery using the separator according to claim 11 .
14 . An electrode material comprising a coating film formed from the coating liquid composition according to claim 1 on a surface of a substrate.