EP 0355816 A2 19900228 - Colloidal alumina as a paper retention aid.
Title (en)
Colloidal alumina as a paper retention aid.
Title (de)
Kolloidale Tonerde als Papierretentionshilfsmittel.
Title (fr)
Alumine colloidale comme agent de rétention en papeterie.
Publication
Application
Priority
US 23681688 A 19880826
Abstract (en)
A binder which is added to a paper-making furnish comprising: a colloidal alumina sol having a positive surface charge and a colloidal alumina concentration in the range between 0.1-1%, the colloidal alumina having a particle size in the range between 1-50 nanometers and is added to the furnish in an amount between about 0.025-0.5% by weight; and an anionic polymer flocculant which is added to the furnish in an amount between about 0.01-0.1% by weight.
IPC 1-7
IPC 8 full level
D21H 17/33 (2006.01); D21H 17/37 (2006.01); D21H 17/42 (2006.01); D21H 17/63 (2006.01); D21H 17/67 (2006.01); D21H 21/10 (2006.01)
CPC (source: EP)
D21H 17/42 (2013.01); D21H 17/675 (2013.01); D21H 21/10 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0355816 A2 19900228; EP 0355816 A3 19920909; BR 8903325 A 19900313; DE 355816 T1 19900927; ES 2014959 A4 19900801; JP H02259196 A 19901019
DOCDB simple family (application)
EP 89115581 A 19890823; BR 8903325 A 19890706; DE 89115581 T 19890823; ES 89115581 T 19890823; JP 21759889 A 19890825