公开(公告)号：EP0296221A4

公开(公告)日：1989-04-24

申请号：EP88900864

申请日：1988-01-06

Applicant: STANFORD RES INST INT

Inventor： SCHMITT ROBERT J ,  HARDEE JOHN R ,  ROSS DAVID S ,  WOLFE JAMES F

IPC: C07C201/00 ,  C07C67/00 ,  C07C201/08 ,  C07C205/20 ,  C07C205/23

CPC classification number: C07C201/08 ,  C07C205/23

公开(公告)号：CA1307007C

公开(公告)日：1992-09-01

申请号：CA555904

申请日：1988-01-05

Applicant: STANFORD RES INST INT

Inventor： SCHMITT ROBERT J ,  HARDEE JOHN R ,  ROSS DAVID S ,  WOLFE JAMES F

IPC: C07C201/00 ,  C07C67/00 ,  C07C201/08 ,  C07C205/20 ,  C07C205/23

Abstract: A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro-resorcinol isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been removed. The nitrating solution contains white fuming nitric acid, a nitrosonium ion control agent such as urea, and, optionally, concentrated sulfuric acid. The 4,6-dinitroresorcinol isomer is provided in yields of about 65-85% with minimal production of undesirable side products.

公开(公告)号：AU1156888A

公开(公告)日：1988-07-27

申请号：AU1156888

申请日：1988-01-06

Applicant: STANFORD RES INST INT

Inventor： WOLFE JAMES F ,  ROSS DAVID S ,  HARDEE JOHN R ,  SCHMITT ROBERT J

IPC: C07C201/00 ,  C07C67/00 ,  C07C201/08 ,  C07C205/20 ,  C07C205/23 ,  C07C79/28

Abstract: A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro resorcinal isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been removed. The nitrating solution contains white fuming nitric acid, a nitrosonium ion control agent such as urea, and, optionally, concentrated sulfuric acid. The 4,6-dinitroresorcinal isomer is provided in yields of about 65-85% with minimal production of undesirable side products.

公开(公告)号：CA1259736A

公开(公告)日：1989-09-19

申请号：CA477720

申请日：1985-03-27

Applicant: STANFORD RES INST INT

Inventor： WOLFE JAMES F ,  SYBERT PAUL D ,  WILSON BLAKE ,  SYBERT JOANNE R

IPC: C08G63/12 ,  C08G63/68 ,  C08K3/32 ,  C08K5/49

Abstract: Novel compositions comprising a high concentration of poly(2,.beta.-benzothiazole) and certain polyphosphoric acids are prepared. Such compositions are optically anisotropic (liquid crystalline), capable of exhibiting excellent cohesive strength, and are especially suited to the production of high molecular weight ordered polymer fibers by dry-jet wet spinning. These liquid crystalline compositions are capable of being drain through long air gap distances and spun at exceptionally high spin draw ratios. Fibers, films and other articles formed from these liquid crystalline compositions exhibit exceptionally high physical and heat resistant properties.