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    • 20. 发明授权
    • FLUORESCENT WHITENING AGENTS
    • OPTISCHE AUFHELLER
    • EP0971905B1
    • 2004-08-11
    • EP98913720.3
    • 1998-03-14
    • Ciba Specialty Chemicals Holding Inc.
    • ROHRINGER, PeterMETZGER, GeorgesREINEHR, Dieter
    • C07D251/68D06L3/12
    • C09B23/148C07D251/68C11D3/42D06L4/621D06L4/657D06L4/75D06M13/07D06M13/358D06P1/6426D21H21/30Y10S8/919
    • The present invention provides new compounds having formula (1), in which X is O or, preferably, NH; M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed; n is 1 or 2; and each R2, independently, is hydrogen, C1-C3alkyl, halogen, cyano, COOR in which R is hydrogen or C1-C3alkyl, CONH-R in which R has its previous significance, SO2NH-R in which R has its previous significance, NH-COR in which R has its previous significance, SO3M in which M has its previous significance or, when n is 1, R2 can also be CO-R3 in which R3 is C1-C3alkyl or phenyl; provided that those compounds are excluded in which a) X is NH, n is 1 and R2 is SO3M in which M has its previous significance; or b) X is NH, n is 2 and one R2 is SO3M in which M has its previous significance, and the other R2 is hydrogen, methyl or halogen; or c) X is NH, n is 1, R1 is glycine and R2 is H or CO2H; or d) X is NH, n is 2, each R2 is SO3M in which M has its previous significance and the SO3M groups are in 2,5-positions in the phenyl ring and R1 is D,L-alanine, L-valine, L-leucine; L-isoleucine, L-threonine, L-aspartic acid, L-glutamic acid, L-phenylalanine, L-proline, D,L-methionine or glycine. Most of the new class of 4,4'-diaminostilbene-2,2'-disulfonic acid compounds are useful as fluorescent whitening agents, especially for paper.
    • 本发明提供新的具有下式的化合物:其中X是O或NH; M是氢,碱金属原子,铵或由胺形成的阳离子; 每个R 1独立地是氨基酸被除去的氨基酸残基; 并且每个R 3独立地是C 1 -C 3烷基或苯基,以及其用于抑制(淬灭)阴离子荧光增白剂对底物的影响的用途。