EP 0192600 B1 19890719 - AQUEOUS OPTICAL BRIGHHTENER COMPOSITIONS AND THEIR USE IN PAPER COATINGS
Title (en)
AQUEOUS OPTICAL BRIGHHTENER COMPOSITIONS AND THEIR USE IN PAPER COATINGS
Publication
Application
Priority
DE 3502038 A 19850123
Abstract (en)
[origin: US4717502A] Aqueous optical brightener compositions consisting essentially of: (a) at least one optical brightener of formula <IMAGE> in which R1 is hydrogen or -SO3M; R2 is hydrogen or -SO3M; R3 is hydrogen, C2-3-hydroxyalkyl, C1-4-alkyl, -CH2-CH2-CN or -CH2-CH2-CONH2; R4 is hydrogen, C1-4-alkyl, C2-3-hydroxyalkyl, hydroxy-ethoxy-ethyl, N,N-Bis-(C1-3-alkyl)-amino-C2-6-alkyl or benzyl; or R3 and R4 together with the neighboring nitrogen atom signify a morpholine, pyrrolidine, piperidine or N-methylpiperazine ring; and M is hydrogen or a colorless cation; provided that at most one of R3 and R4 is hydrogen; (b) polyethylene glycol with an average molecular weight in the range of 1000 to 3000; and (c) water; 10 to 500 parts by weight of component (b) being present per 100 parts by weight of component (a), and component (c) constituting at least 20% of the composition, are storage stable optical brightener compositions, which are eminently suitable for the formulation of aqueous coating compositions especially such in which at least some of the binder is a synthetic latex; with these coating compositions there may be obtained very white coated papers which are optically brightened at least in the coating.
IPC 1-7
IPC 8 full level
C09D 7/00 (2006.01); C09B 67/44 (2006.01); C09D 7/12 (2006.01); D06L 3/12 (2006.01); D06L 4/664 (2017.01); D21H 19/44 (2006.01); D21H 21/30 (2006.01)
CPC (source: EP US)
D06L 4/664 (2016.12 - EP US); D21H 21/30 (2013.01 - EP US)
Citation (examination)
- GB 930393 A
- US 3360479 A 19671226 - HEINRICH HAUSERMANN
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
US 4717502 A 19880105; AT E44785 T1 19890815; DE 3502038 A1 19860724; DE 3664499 D1 19890824; EP 0192600 A1 19860827; EP 0192600 B1 19890719; JP S61174269 A 19860805; ZA 86526 B 19870826
DOCDB simple family (application)
US 82004386 A 19860121; AT 86810011 T 19860114; DE 3502038 A 19850123; DE 3664499 T 19860114; EP 86810011 A 19860114; JP 1028886 A 19860122; ZA 86526 A 19860123