EP 0418343 B1 19930526 - PROCESS FOR MANUFACTURING PAPER, PAPERBOARD AND CARDBOARD IN THE PRESENCE OF COPOLYMERIZATES CONTAINING N-VINYL FORMAMIDE UNITS
Title (en)
PROCESS FOR MANUFACTURING PAPER, PAPERBOARD AND CARDBOARD IN THE PRESENCE OF COPOLYMERIZATES CONTAINING N-VINYL FORMAMIDE UNITS
Publication
Application
Priority
DE 3909004 A 19890318
Abstract (en)
[origin: WO9011404A1] Process for manufacturing paper, paperboard and cardboard by dehydrating a pulp in the presence of non-hydrolysed copolymerizates containing (a) 99 to 1 mol.% of N-vinyl formamide and (b) 1 to 99 mol.% of at least one water-soluble basic monomer of formula (I) or (II), where R<1> = H, CH3, C2H5, R<2>, R<3> and R<4> = H, CH3, C2H5 (-CH2-CH2-O-)nH, R<5>, R<6> = C1 to C10 alkyl, A = C1 to C6 alkylene, n = 1 to 6 and Y< THETA > = an anion, polymerized together, in quantities of 0.01 to 3.5 wt.%, in relation to the dried pulp.
IPC 1-7
IPC 8 full level
D21H 17/34 (2006.01); D21H 17/45 (2006.01); D21H 21/06 (2006.01); D21H 21/10 (2006.01)
CPC (source: EP US)
D21H 17/455 (2013.01 - EP US); D21H 21/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9011404 A1 19901004; CA 2030540 A1 19900919; DE 3909004 A1 19900927; DE 59001550 D1 19930701; EP 0418343 A1 19910327; EP 0418343 B1 19930526; ES 2043361 T3 19931216; FI 905661 A0 19901115; FI 95943 B 19951229; FI 95943 C 19960410; JP H03505239 A 19911114; PT 93472 A 19901107; PT 93472 B 19960329; US 5262008 A 19931116
DOCDB simple family (application)
EP 9000406 W 19900314; CA 2030540 A 19900314; DE 3909004 A 19890318; DE 59001550 T 19900314; EP 90904264 A 19900314; ES 90904264 T 19900314; FI 905661 A 19901115; JP 50421990 A 19900314; PT 9347290 A 19900316; US 62395490 A 19901204