EP 0274666 A1 19880720 - Paper-coating compositions comprising whitening agents.
Title (en)
Paper-coating compositions comprising whitening agents.
Title (de)
Weisstönerhaltige Papierstreichmassen.
Title (fr)
Compositions de couchage pour papier comprenant des agents de blanchiment.
Publication
Application
Priority
DE 3643215 A 19861218
Abstract (en)
[origin: US4888128A] Fluorescent brightener salts of the formula <IMAGE> in which A denotes the anion of an anionic cellulose fluorescent brightener, R1 denotes alkyl, alkenyl, aralkyl, aryl or cycloalkyl, R2, R3 and R4 denote hydrogen or R1, or together, including the N atom, form a heterocyclic ring, and n denotes 1 or 2, are suitable for incorporation into paper-coating slips. The brightened coating slips are distinguished, inter alia, by the fact that the achievable greying limit is very high.
Abstract (de)
Aufhellersalze der Formel <IMAGE> worin A = das Anion eines anionischen Celluloseweißtöners, R1 = Alkyl, Alkenyl, Aralkyl, Aryl oder Cycloalkyl, R2, R3 und R4 Wasserstoff oder R1, oder gemeinsam unter Einschluß des N-Atoms einen Heterocyclus bilden, und n = 1 oder 2 bedeuten, eignen sich deshalb zur Einarbeitung in Papierstreichmassen. Die aufgehellten Streichmassen zeichnen sich u.a. dadurch aus, daß die erreichbare Vergrauugsgrenze sehr hoch liegt.
IPC 1-7
IPC 8 full level
D21H 19/44 (2006.01); C07D 251/50 (2006.01); C07D 251/52 (2006.01); C07D 251/68 (2006.01); D21H 19/46 (2006.01); D21H 21/30 (2006.01)
CPC (source: EP US)
D21H 21/30 (2013.01 - EP US)
Citation (search report)
- [A] DE 2403207 A1 19740725 - ICI LTD
- [X] CHEMICAL ABSTRACTS, Band 98, Nr. 6, 7. Februar 1983, Seite 39, Zusammenfassung Nr. 35526b, Columbus, Ohio, US; & JP-A-57 123 262 (SHOWA CHEMICAL INDUSTRIES, LTD) 31-07-1982
Designated contracting state (EPC)
CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0274666 A1 19880720; EP 0274666 B1 19920325; DE 3643215 A1 19880630; DE 3777789 D1 19920430; FI 87378 B 19920915; FI 87378 C 19921228; FI 875517 A0 19871216; FI 875517 A 19880619; JP S63165596 A 19880708; US 4888128 A 19891219
DOCDB simple family (application)
EP 87118124 A 19871208; DE 3643215 A 19861218; DE 3777789 T 19871208; FI 875517 A 19871216; JP 31114587 A 19871210; US 13178087 A 19871211