EP 1716288 A1 20061102 - MODIFYING CELLULOSE FIBRES BY USING AMPHOTERIC CELLULOSE DERIVATIVE
Title (en)
MODIFYING CELLULOSE FIBRES BY USING AMPHOTERIC CELLULOSE DERIVATIVE
Title (de)
MODIFIZIERUNG VON CELLULOSEFASERN UNTER VERWENDUNG EINES AMPHOTEREN CELLULOSEDERIVATS
Title (fr)
MODIFICATION DE FIBRES DE CELLULOSE A L'AIDE D'UN DERIVE DE CELLULOSE AMPHOTERE
Publication
Application
Priority
- SE 2005000136 W 20050203
- SE 0400396 A 20040220
Abstract (en)
[origin: WO2005080678A1] The present invention provides a method for the modification of lignocellulosic materials. Cellulose fibres are treated with an aqueous electrolyte-containing solution of an amphoteric cellulose derivative for at least 5 minutes at a temperature of at least 50 °C. The pH during the treatment is approximately 1.5-4.5 or higher than 11; or the concentration of the electrolyte is approximately 0.0001-0.05 M if the electrolyte has monovalent cations, or approximately 0.0002-0.1 M if the electrolyte has divalent cations. Further the invention relates to products obtainable by the above mentioned method and uses of said products for manufacturing paper with a high wet strength and rayon fibres.
IPC 8 full level
D21C 9/00 (2006.01); D21H 11/20 (2006.01); D21H 17/25 (2006.01); D21H 17/26 (2006.01); D21H 21/20 (2006.01)
IPC 8 main group level
D21C (2006.01)
CPC (source: EP)
D21C 9/005 (2013.01); D21H 11/20 (2013.01); D21H 17/26 (2013.01); D21H 21/20 (2013.01)
Citation (search report)
See references of WO 2005080678A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005080678 A1 20050901; EP 1716288 A1 20061102; EP 1716288 B1 20140917; ES 2525524 T3 20141226; SE 0400396 D0 20040220
DOCDB simple family (application)
SE 2005000136 W 20050203; EP 05704796 A 20050203; ES 05704796 T 20050203; SE 0400396 A 20040220