EP 0905317 A1 19990331 - A method for optically brightening paper
Title (en)
A method for optically brightening paper
Title (de)
Verfahren zum optisch Aufhellen von Papier
Title (fr)
Procédé d'azurage optique de papier
Publication
Application
Priority
- EP 98810889 A 19980908
- EP 97810668 A 19970916
Abstract (en)
A simplified method for the optical brightening of paper either in the pulp mass, the size or metering press or by coating by the use of a formulation of an optical brightening agent together with a swellable layered silicate.
IPC 1-7
IPC 8 full level
D21H 21/30 (2006.01); D21H 17/68 (2006.01); D21H 19/40 (2006.01)
CPC (source: EP)
D21H 21/30 (2013.01); D21H 17/68 (2013.01)
Citation (applicant)
- CH 409981 A 19660331 - GEIGY AG J R [CH]
- CH 548484 A 19740430 - SANDOZ AG
- FR 2355955 A1 19780120 - MOBIL OIL [US]
- US 5622749 A 19970422 - ROHRINGER PETER [CH], et al
Citation (search report)
- [DY] DE 19538029 A1 19970417 - SUED CHEMIE AG [DE]
- [Y] EP 0588768 A2 19940323 - CIBA GEIGY AG [CH]
- [Y] EP 0274666 A1 19880720 - BAYER AG [DE]
- [Y] US 5622749 A 19970422 - ROHRINGER PETER [CH], et al
- [A] FR 2355955 A1 19780120 - MOBIL OIL [US]
- [A] CH 548484 A 19740430 - SANDOZ AG
- [A] CH 409981 A 19660331 - GEIGY AG J R [CH]
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98810889 A 19980908