New optical agents for whitening. I. Synthesis and physical-chemical characterization of some stilbene-s-triazine derivatives of 4,4 '-diaminostilbene-2,2 '-disulphonic acid
A. Nuta et al., New optical agents for whitening. I. Synthesis and physical-chemical characterization of some stilbene-s-triazine derivatives of 4,4 '-diaminostilbene-2,2 '-disulphonic acid, REV CHIM, 49(12), 1998, pp. 855-860
The work presents possibilities of syntheses fur, seven new whitening agent
s of stilbene type. These compounds were obtained by unsymmetrical condensa
tion of cyanuric chloride with 4,4 '-diaminostilbene-2,2'-disulfonic acid a
nd other nucleophilic agents: aminobenzenesulfonic acids, aminobenzenesulph
onamides or aliphatic alcohols. The substitution reactions take place in a
sequence imposed by reactivity criteria.
The synthetized compounds have been investigated by elemental analysis, thi
n layerchromatography. IR and UV-VIS spectra. Applications tests on cotton,
viscose and polyamide texture have shown a fluorescent whitening agent beh
aviour.