公开(公告)号：US20170342215A1

公开(公告)日：2017-11-30

申请号：US15520971

申请日：2015-10-23

Applicant: UBE INDUSTRIES, LTD.

Inventor： Takuya OKA ,  Yukinori KOHAMA ,  Nobuharu HISANO

IPC: C08G73/10 ,  C08J5/18

CPC classification number: C08G73/1078 ,  C08G73/10 ,  C08J5/18 ,  C08J2379/08 ,  C08J2479/08

Abstract: The present invention relates to a polyimide film consisting essentially of a polyimide comprising a repeating unit represented by the following chemical formula (1): wherein the film has a YI (yellowness index) of 4 or less, a tensile modulus of elasticity of 4 GPa or more, and a load at break of 10 N or more.

公开(公告)号：US20170313821A1

公开(公告)日：2017-11-02

申请号：US15520800

申请日：2015-10-23

Applicant: UBE INDUSTRIES, LTD.

Inventor： Takuya OKA ,  Yukinori KOHAMA ,  Nobuharu HISANO

IPC: C08G73/10 ,  C08J5/18

CPC classification number: C08G73/1078 ,  C08G73/10 ,  C08J5/18 ,  C08J2379/08 ,  G02F2001/133331 ,  Y02E10/50

Abstract: The present invention relates to a polyimide precursor comprising a repeating unit represented by the following chemical formula (1A) and a repeating unit represented by the following chemical formula (2A): wherein A1 is a divalent group having an aromatic ring; and R1 and R2 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms, wherein A2 is a divalent group having an aromatic ring; and R3 and R4 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms.

公开(公告)号：US20180171077A1

公开(公告)日：2018-06-21

申请号：US15735287

申请日：2016-06-10

Applicant: UBE INDUSTRIES, LTD.

Inventor： Takuya OKA ,  Yukinori KOHAMA ,  Ryoichi TAKASAWA ,  Nobuharu HISANO ,  Ken KAWAGISHI

IPC: C08G73/10 ,  C08K3/26 ,  B32B17/06 ,  B32B27/28

CPC classification number: C08G73/1071 ,  B32B17/064 ,  B32B27/281 ,  B32B2307/7242 ,  B32B2457/12 ,  B32B2457/20 ,  B32B2457/208 ,  C08G73/10 ,  C08G73/1042 ,  C08G73/1067 ,  C08G73/1078 ,  C08G73/1082 ,  C08G73/14 ,  C08K3/26 ,  C08K2003/2206 ,  C08K2003/262 ,  C08K2003/265 ,  C09D179/08 ,  G06F3/041 ,  G06F2203/04102 ,  H01L23/145 ,  H01L23/4985 ,  H01L27/1218 ,  H01L27/1292 ,  H01L31/03926 ,  H05K1/0271 ,  H05K1/028 ,  H05K1/0346 ,  H05K1/0353 ,  H05K1/0373 ,  H05K2201/0108 ,  H05K2201/0154

Abstract: A polyimide precursor composition including a polyimide precursor, and a fine particle having an optical anisotropy; and a polyimide composition including a polyimide, and a fine particle having an optical anisotropy.

公开(公告)号：US20160297995A1

公开(公告)日：2016-10-13

申请号：US15028288

申请日：2014-10-08

Applicant: UBE INDUSTRIES, LTD.

Inventor： Takuya OKA ,  Yukinori KOHAMA ,  Nobuharu HISANO

IPC: C09D179/08

CPC classification number: C09D179/08 ,  C08G73/1039 ,  C08G73/1046 ,  C08G73/105 ,  C08G73/1078 ,  C08G73/14

Abstract: A polyimide precursor obtained from a tetracarboxylic acid component including norbornane-2-spiro-α-cyclopentanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride, or a derivative thereof, and a diamine component including a diamine, or a derivative thereof, the norbornane-2-spiro-α-cyclopentanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride characterized in that the ratio of the peak area of a certain peak is 60% or more in a gas chromatogram obtained by conducting gas chromatography analysis.

Abstract translation: 由包含降冰片烷-2-螺-α-环戊酮-α-螺-2“ - 降冰片烷-5,5”，6,6“ - 四羧酸二酐或其衍生物的四羧酸组分得到的聚酰亚胺前体，和 二胺组分，包括二胺或其衍生物，降冰片烷-2-螺-α-环戊酮-α-螺-2“ - 降冰片烷-5,5”，6,6“ - 四羧酸二酐，其特征在于， 在通过气相色谱分析获得的气相色谱中，某峰的峰面积为60％以上。