EP 0331047 A1 19890906 - Papermaking process comprising the addition of high molecular weight poly(vinylamines) to the wet-end cellulose fiber slurry.
Title (en)
Papermaking process comprising the addition of high molecular weight poly(vinylamines) to the wet-end cellulose fiber slurry.
Title (de)
Papierherstellungsverfahren, das die Zugabe von Poly(vinylaminen) mit hohem Molekulargewicht zum Cellulosefaserbrei in der Nasspartie umfasst.
Title (fr)
Procédé papetier comprenant l'addition de poly(vinylamines) à haut poids moléculaire à la partie humide de la pâte de fibres cellulosiques.
Publication
Application
Priority
US 16414688 A 19880304
Abstract (en)
A high molecular weight polymer, comprising at least 10% of vinyl amine units produced by hydrolysis of a polyvinyl amide, for use as a wet-end papermaking additive to increase the dry strengh of the paper product or improve the pigment retention.
IPC 1-7
IPC 8 full level
D21H 17/34 (2006.01); D21H 17/45 (2006.01); D21H 11/04 (2006.01); D21H 17/42 (2006.01); D21H 17/67 (2006.01); D21H 21/10 (2006.01); D21H 21/18 (2006.01)
CPC (source: EP)
D21H 17/45 (2013.01); D21H 11/04 (2013.01); D21H 17/42 (2013.01); D21H 17/675 (2013.01); D21H 21/10 (2013.01); D21H 21/18 (2013.01)
Citation (search report)
- [X] EP 0216387 A2 19870401 - BASF AG [DE]
- [AD] US 3597314 A 19710803 - LAUBE KARLHEINZ, et al
- [A] US 2721140 A 19551018 - WEISGERBER CYRUS A
- [XP] EP 0262577 A2 19880406 - AIR PROD & CHEM [US]
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0331047 A1 19890906; FI 890994 A0 19890302; FI 890994 A 19890905; JP H026685 A 19900110
DOCDB simple family (application)
EP 89103305 A 19890224; FI 890994 A 19890302; JP 5018189 A 19890303