Process for quenching or suppressing the fluorescence of substra

Details Process for quenching or suppressing the fluorescence of substra Process for quenching or suppressing the fluorescence of substra

1988-09-23

1990-08-21

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Six-membered hetero ring having two or more ring hetero...

8573, 8589, 8648, 8917, 8924, 81283, D06L 312, D06M 1334, D06P 162, C09B 6700

Patent

active

049503049

ABSTRACT:
There is disclosed a process for quenching or suppressing the fluorescence of natural or synthetic polyamide substrates treated, or to be treated, with fluorescent whitening agents, which process comprises applying to said substrates, before or after the treatment with the fluorescent whitening agent, a sulfonated UV absorber of formula ##STR1## wherein X, R.sub.1, R.sub.2 and R.sub.3 are as defined in claim 1, and fixing said UV absorber thereon.

REFERENCES:
patent: 4313732 (1987-02-01), Teague et al.
patent: 4668235 (1987-05-01), Evans et al.
patent: 4698064 (1987-10-01), Evans et al.
patent: 4770667 (1988-09-01), Evans et al.
Chem. Abstract, 77, 36262r (1972).
H. Gold in Venkataraman's "The Chemistry of Synthetic Dyes," vol. V, (Academic Press), 1971, p. 536.

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