公开(公告)号：JP2002201271A

公开(公告)日：2002-07-19

申请号：JP2001390598

申请日：2001-12-21

Applicant: DU PONT

Inventor： DODD JOHN R ,  KREUZ JOHN A ,  AUMAN BRIAN C

IPC: C08G73/10 ,  C08G73/14

Abstract: PROBLEM TO BE SOLVED: To provide a polyimide copolymer which simultaneously possesses characteristics such as a high heat stability, melt processibility and recoverable crystallinity. SOLUTION: A segmented, melt-processible, semicrystalline polyimide copolymer containing a first imidized segment and a second imidized segment, is prepared through steps wherein (a) a first amic acid segment is prepared, (b) the first amic acid segment is imidized to form the first imidized segment, (c) the first imidized segment is allowed to react with one or more reactant and (d) a second amic acid segment is imidized to form the second imidized segment.

公开(公告)号：JP2002226584A

公开(公告)日：2002-08-14

申请号：JP2001390580

申请日：2001-12-21

Applicant: DU PONT

Inventor： AUMAN BRIAN C ,  CORCORAN JR WILLIAM R ,  DODD JOHN R ,  GUIDRY MARK A ,  SUMMERS JOHN D

IPC: C08J5/00 ,  B29C47/00 ,  B29K79/00 ,  C08G73/10

Abstract: PROBLEM TO BE SOLVED: To provide a melt-processable random copolyimide having semicrystallinity, and exhibiting the (semi)crystallinity recoverable from its melt, and further to provide a method for producing the copolyimide. SOLUTION: This copolyimide is produced from a reaction product of (I) an aromatic dianhydride component comprising 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and/or 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), and an aromatic carboxylic dianhydride (ODPA) including 4,4'- oxydiphthalic dianhydride, (II) an aromatic diamine component selected from the group consisting of 1,3-bis(4-aminophenoxy)benzene (APB-134), 3,4'- oxydianiline (3,4'-ODA), 4,4'-oxydianiline (4,4'-ODA) and 1,4-diaminobenzene (PPD), and (III) an end-capping component.

公开(公告)号：DE60110195D1

公开(公告)日：2005-05-25

申请号：DE60110195

申请日：2001-10-29

Applicant: DU PONT

Inventor： DODD JOHN R ,  AUMAN BRIAN C ,  KREUZ JOHN R

IPC: C08G73/10 ,  C08G73/14

Abstract: Segmented, melt-processible, semicrystalline copolyimides are disclosed herein. These polymers are comprised of an amorphous or semicrystalline A segment (soft segment) and a semicrystalline B segment (hard segment), wherein the level of semicrystallinity in the A segment is less than that in the B segment. These copolyimides are semicrystalline and exhibit melting points in the range from about 330-395 DEG C In preferred embodiments, these copolyimides are end-capped and are crystallizable from their melts (i.e., they exhibit recoverable semicrystallinity). These copolyimides either inherently have suitably low melt visocosities to be melt-processible or can be made to have suitably low melt viscosities to be melt-processible by addition of certain additives Tailoring of the melting points and glass transition temperatures of these copolyimides can be effected by changing their molecular architecture.

公开(公告)号：DE60110195T2

公开(公告)日：2006-03-09

申请号：DE60110195

申请日：2001-10-29

Applicant: DU PONT

Inventor： DODD JOHN R ,  AUMAN BRIAN C ,  KREUZ JOHN R

IPC: C08G73/10 ,  C08G73/14

Abstract: Segmented, melt-processible, semicrystalline copolyimides are disclosed herein. These polymers are comprised of an amorphous or semicrystalline A segment (soft segment) and a semicrystalline B segment (hard segment), wherein the level of semicrystallinity in the A segment is less than that in the B segment. These copolyimides are semicrystalline and exhibit melting points in the range from about 330-395 DEG C In preferred embodiments, these copolyimides are end-capped and are crystallizable from their melts (i.e., they exhibit recoverable semicrystallinity). These copolyimides either inherently have suitably low melt visocosities to be melt-processible or can be made to have suitably low melt viscosities to be melt-processible by addition of certain additives Tailoring of the melting points and glass transition temperatures of these copolyimides can be effected by changing their molecular architecture.

公开(公告)号：DE60114131D1

公开(公告)日：2005-11-24

申请号：DE60114131

申请日：2001-10-29

Applicant: DU PONT

Inventor： AUMAN BRIAN C ,  DODD JOHN R ,  CORCORAN WILLIAM R JR ,  GUIDRY MARK A ,  SUMMERS JOHN D

IPC: C08J5/00 ,  B29C47/00 ,  B29K79/00 ,  C08G73/10

公开(公告)号：DE60114131T2

公开(公告)日：2006-07-27

申请号：DE60114131

申请日：2001-10-29

Applicant: DU PONT

Inventor： AUMAN BRIAN C ,  DODD JOHN R ,  CORCORAN WILLIAM R KENNETT SQU ,  GUIDRY MARK A ,  SUMMERS JOHN D

IPC: C08G73/10 ,  C08J5/00 ,  B29C47/00 ,  B29K79/00