EP 0430689 B1 19940406 - Mesophase pitch for use in the making of carbon materials.
Title (en)
Mesophase pitch for use in the making of carbon materials.
Title (de)
Mesophasepech zur Herstellung von Carbonmaterialien.
Title (fr)
Brai en phase méso pour la préparation d'objets en carbone.
Publication
Application
Priority
- JP 27230090 A 19901012
- JP 30948289 A 19891129
Abstract (en)
[origin: EP0430689A1] Pitch obtained from naphthalene derivatives having at least one methyl group and an optically anisotropic phase which is substantially 100% is disclosed. This mesophase pitch has a H/C atomic ratio of about 0.5-1.0 and an aromatic carbon ratio (fa) of at least about 0.7, contains methylic carbon in an amount of at least about 4% of the total carbon atoms, and has a softening point of 200-250 DEG C. Fibers melt spun from this mesophase pitch can be converted to carbon or graphite fibers having high strength and modulus of elasticity by a heat treatment which consists of heating to a temperature of 200-350 DEG C in an air atmosphere, then heating to about 1,000 DEG C or higher in an inert gas atmosphere. Such mesophase pitch is produced by polymerizing a naphthalene derivative having at least one methyl group for about 5-300 minutes at a temperature of about 180-400 DEG C and at a pressure of about 5-100 atmosphere in the presence of about 0.1-20 moles of HF and about 0.05-1.0 mole of BF3 per mole of the naphthalene derivative.
IPC 1-7
IPC 8 full level
C10C 3/00 (2006.01); D01F 9/15 (2006.01); D01F 9/155 (2006.01)
CPC (source: EP)
C10C 3/00 (2013.01); D01F 9/15 (2013.01); D01F 9/155 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0430689 A1 19910605; EP 0430689 B1 19940406; DE 69007941 D1 19940511; DE 69007941 T2 19940811
DOCDB simple family (application)
EP 90312978 A 19901129; DE 69007941 T 19901129