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公开(公告)号：US11945922B2
公开(公告)日：2024-04-02
申请号：US17276188
申请日：2018-11-22
发明人： Won Ho Son , Hyong Sop Jo
IPC分类号： C08J5/18 , C08G73/10 , C08L79/08 , C09J7/10 , C09J179/08
CPC分类号： C08J5/18 , C08G73/1032 , C08G73/1046 , C08G73/1071 , C08L79/08 , C09J7/10 , C09J179/08 , C08J2379/08 , C08L2203/206 , C09J2479/08
摘要： The present invention provides a polyimide film in which a parameter A for the relationship of the viscosity (V) of a polyamic acid solution, the number average molecular weight (Mn) of polyamic acid, and the thickness (T) of a polyimide film falls within a range from 0.4 to 1.13.
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公开(公告)号：US20240002600A1
公开(公告)日：2024-01-04
申请号：US18037862
申请日：2020-11-27
发明人： In Hwan HWANG , Ik Sang LEE
CPC分类号： C08G73/1067 , C08J5/18 , C08K3/36 , C08G73/1032
摘要： The present application relates to a polyamic acid composition and a polyimide comprising same, and provides a polyamic acid composition which has a high concentration of polyamic acid solids and a low viscosity and, after hardening, has superior heat resistance, dimensional stability, and mechanical properties, and a polyimide and a polyimide film produced therefrom.
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公开(公告)号：US20230002613A1
公开(公告)日：2023-01-05
申请号：US17778479
申请日：2020-11-20
发明人： Jin-Seok JEON , Min-Sang CHO , Kil-Nam LEE
IPC分类号： C08L79/08
摘要： The present invention provides: a polyimide composite powder which includes 1-30 wt % of a fluorine-based resin filler, and has excellent low dielectric properties; and a production method using water as a dispersion medium. Also provided are a molded body including the polyimide composite powder, and a method for producing same.
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公开(公告)号：US20220372224A1
公开(公告)日：2022-11-24
申请号：US17772299
申请日：2020-09-15
发明人： Won Ho SON , Hyong Sop JO
摘要： Disclosed herein are a polyimide film for graphite sheets and a graphite sheet manufactured using the same. The polyimide film is fabricated by imidizing a precursor composition including: a polyamic acid prepared by reacting a dianhydride monomer with a diamine monomer; and an organic solvent, wherein the diamine monomer includes about 30 mol % to about 70 mol % of 4,4′-methylenedianiline and about 30 mol % to about 70 mol % of 4,4′-oxydianiline based on the total number of moles of the diamine monomer, 4,4′-methylenedianiline and 4,4′-oxydianiline being present in total in an amount of about 85 mol % or more based on the total number of moles of the diamine monomer.
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公开(公告)号：US20220017710A1
公开(公告)日：2022-01-20
申请号：US17298472
申请日：2019-03-26
发明人： Dong Young WON , Dong Young KIM , Sung Il CHO , Jeong Yeul CHOI
摘要： The present invention provides a polyimide film comprising inorganic fillers, the inorganic fillers comprising: a first filler group having a particle diameter (D50) falling within the range of 2-2.7 μm; and a second filler group having an average particle diameter (D50) falling within the range of 1-1.7 μm, wherein each of the first and second filler groups satisfies relational expression 1, 0.7≤(D90−D10)/(D50)≤1.2, with respect to the particle diameter.
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公开(公告)号：US20220017371A1
公开(公告)日：2022-01-20
申请号：US17298489
申请日：2019-10-28
发明人： Kyung Su KIM , Dong Young WON
IPC分类号： C01B32/205 , C08J5/18 , B29C55/06 , B29C55/00
摘要： Disclosed are a graphite sheet formed from a polyimide film having a molecular orientation ratio of at least about 1.25, and a method for producing the same.
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公开(公告)号：US20240317970A1
公开(公告)日：2024-09-26
申请号：US18282863
申请日：2022-03-22
发明人： Hyeong-Seop JUNG , Dong-Young WON
IPC分类号： C08K5/521 , C01B32/205 , C08J5/18 , C08K5/50
CPC分类号： C08K5/521 , C01B32/205 , C08J5/18 , C08K5/50 , C01P2006/32 , C08J2379/08
摘要： Disclosed is a polyimide film comprising a first plasticizer and a second plasticizer, wherein the molecular weights of the first plasticizer and the second plasticizer are 700 g/mol or less. In addition, a method for manufacturing a graphite sheet using the polyimide film and a graphite sheet having an excellent appearance prepared therefrom are disclosed.
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公开(公告)号：US12043712B2
公开(公告)日：2024-07-23
申请号：US16975574
申请日：2018-07-20
发明人： Kyung Su Kim , Jeong Yeul Choi , Dong Young Won
CPC分类号： C08J5/18 , C08K3/042 , C08K9/04 , C08L79/08 , C08J2379/08 , C08K2003/265 , C08K2003/3045 , C08K2003/325
摘要： The present invention provides a graphite sheet polyimide film derived from a first precursor composition comprising a first polyamic acid, the polyimide film comprising a sublimable inorganic filler and a graphene-containing spherical polyimide-based filler.
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公开(公告)号：US20240228792A1
公开(公告)日：2024-07-11
申请号：US18561280
申请日：2022-05-17
发明人： Gyeong Hyeon RO , Ik Sang LEE
摘要： The present application provides; a varnish, which is a polyimide precursor that is imidized by thermal curing, and implements the insulation, adhesion, heat resistance, mechanical strength, and light resistance of polyimide; a film including same; and a vehicle device coated with the film.
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公开(公告)号：US20240204194A1
公开(公告)日：2024-06-20
申请号：US18287642
申请日：2022-04-22
发明人： Se Joo PARK , In Hwan HWANG , Ik Sang LEE
摘要： The present application relates to a polyamic acid composition, a binder resin composition for an electrode, an electrode active material composition comprising the binder resin composition, and an electrode comprising same, and provides a novel binder material which has excellent mechanical strength and excellent binding force by synthesizing polyamic acid and applying same as a silicone-based negative electrode binder.
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