US 11,655,336 B2
Polyimide film for preparing roll type graphite sheet
Dong Young Won, Seoul (KR); Hyun Jai Lim, Gumi-Si (KP); and Kyung Su Kim, Seoul (KR)
Assigned to SKCKOLONPI INC, Chungcheongbuk-Do (KR)
Appl. No. 16/758,224
Filed by SKCKOLONPI INC, Chungcheongbuk-Do (KR)
PCT Filed Dec. 29, 2017, PCT No. PCT/KR2017/015754
§ 371(c)(1), (2) Date Apr. 22, 2020,
PCT Pub. No. WO2019/083093, PCT Pub. Date May 2, 2019.
Claims priority of application No. 10-2017-0137729 (KR), filed on Oct. 23, 2017.
Prior Publication US 2020/0291180 A1, Sep. 17, 2020
Int. Cl. C08G 73/10 (2006.01); C08J 5/18 (2006.01); C08K 3/26 (2006.01); C08K 3/30 (2006.01); C08K 3/32 (2006.01)
CPC C08G 73/1042 (2013.01) [C08J 5/18 (2013.01); C08J 2379/08 (2013.01); C08K 2003/265 (2013.01); C08K 2003/3045 (2013.01); C08K 2003/325 (2013.01); C08K 2201/003 (2013.01)] 16 Claims
 
1. A polyimide film for a roll type graphite sheet produced by imidizing a polyamic acid formed by a reaction of a dianhydride monomer and a diamine monomer,
wherein the polyimide film has a modulus of 2.7 GPa or more,
wherein the polyimide film comprises a first filler having an average particle diameter of about 2.0 μm to 2.5 μm and a second filler having an average particle diameter of about 1.0 μm to 1.6 μm.