EP 0932710 A1 19990804 - AQUEOUS COAGULATING AGENT FOR LIQUID CRYSTAL SOLUTIONS WITH BASE OF CELLULOSE SUBSTANCES
Title (en)
AQUEOUS COAGULATING AGENT FOR LIQUID CRYSTAL SOLUTIONS WITH BASE OF CELLULOSE SUBSTANCES
Title (de)
WÄSSRIGE KOAGULATIONSMITTEL FÜR FLÜSSIGKRISTALLLÖSUNGEN AUF BASIS VON CELLULOSEHÄLTIGEN MATERIALEN
Title (fr)
AGENT COAGULANT AQUEUX POUR SOLUTIONS CRISTAL-LIQUIDE A BASE DE MATIERES CELLULOSIQUES
Publication
Application
Priority
- EP 9705676 W 19971015
- FR 9612871 A 19961018
Abstract (en)
[origin: WO9817848A1] The invention concerns an aqueous coagulating agent for a liquid crystal solution with a base of cellulose substances, characterised by the following: it contains water and at least one additive; when it is contacted with said solution, the diffusion kinetics (diffusion front D) of the coagulating agent and that of precipitation (precipitation front P) of the cellulose substances by the action of said agent, measured under the microscope for the so-called "coagulation test" for an additive proportion of 20 wt.%, comply with the following relationship: 0.55 < Kp/Kd </= 1, Kp and Kd being respectively the factors of diffusion and precipitation (respective "Fick" straight line gradients), expressed in mu m/s<1/2>. The invention also concerns a method for spinning a solution of liquid crystal solution with a base of cellulose substances, in particular the "dry-jet-wet-spinning" method, using a coagulating agent as per the invention as well as spun articles, fibers or films, obtained by this method.
IPC 1-7
IPC 8 full level
C08B 1/00 (2006.01); D01F 2/00 (2006.01); D01F 2/02 (2006.01); D01F 2/28 (2006.01)
CPC (source: EP US)
D01F 2/00 (2013.01 - EP US); D01F 2/02 (2013.01 - EP US); D01F 2/28 (2013.01 - EP US); Y10T 428/249933 (2015.04 - EP US); Y10T 428/249994 (2015.04 - EP US); Y10T 428/249998 (2015.04 - EP US); Y10T 428/25 (2015.01 - EP US); Y10T 428/253 (2015.01 - EP US)
Citation (search report)
See references of WO 9817848A1
Designated contracting state (EPC)
AT DE ES FR GB IT NL
DOCDB simple family (publication)
WO 9817848 A1 19980430; AT E200695 T1 20010515; AU 4947597 A 19980515; BR 9711937 A 19990921; CA 2268789 A1 19980430; CN 1086428 C 20020619; CN 1241225 A 20000112; DE 69704631 D1 20010523; DE 69704631 T2 20010830; EP 0932710 A1 19990804; EP 0932710 B1 20010418; ES 2156369 T3 20010616; JP 2001507383 A 20010605; JP 4216340 B2 20090128; RU 2184804 C2 20020710; US 6342296 B1 20020129
DOCDB simple family (application)
EP 9705676 W 19971015; AT 97912185 T 19971015; AU 4947597 A 19971015; BR 9711937 A 19971015; CA 2268789 A 19971015; CN 97180817 A 19971015; DE 69704631 T 19971015; EP 97912185 A 19971015; ES 97912185 T 19971015; JP 51891598 A 19971015; RU 99110497 A 19971015; US 29310299 A 19990416