C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/171, 8/52
C08G 73/06 (2006.01) D06L 3/12 (2006.01) D21H 21/30 (2006.01)
Patent
CA 1051144
Abstract of the Disclosure A method for eliminating or preventing the brighten- ing effect on materials, particularly fibrous materials such as textiles and paper, of anionic optical bright- ening agents involving the use of hydrosoluble acid addition salts or quaternary ammonium salts of compounds containing the group of formula: Image wherein the benzene radical is linked within the group at its m- or p-positions.
211769
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