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1. (WO2009118247) IMPROVED OPTICAL BRIGHTENING COMPOSITIONS

Pub. No.:    WO/2009/118247    International Application No.:    PCT/EP2009/052919
Publication Date: Oct 1, 2009 International Filing Date: Mar 12, 2009
IPC: D21H 17/66
D21H 21/16
D21H 21/30
D21H 17/63
Applicants: CLARIANT FINANCE (BVI) LIMITED
JACKSON, Andrew Clive
PUDDIPHATT, David
KLEIN, Cédric
Inventors: JACKSON, Andrew Clive
PUDDIPHATT, David
KLEIN, Cédric
Title: IMPROVED OPTICAL BRIGHTENING COMPOSITIONS
Abstract:
The instant invention relates to mixed salts of optical brighteners of formula (1), wherein M represents a mixture of Mg2+ with another cation, which provide for superior optical brightening effects when applied to the surface of paper.