Method of dyeing paper utilizing trisazo dyes

Details Method of dyeing paper utilizing trisazo dyes Method of dyeing paper utilizing trisazo dyes

1989-07-19

1991-09-17

Lee, Mary C.

Paper making and fiber liberation

Processes and products

Non-fiber additive

8524, 8552, 8564, 8585, 8597, 8919, 534811, 534812, 534815, 534728, D21H 2128, C09B 3535, C09B 6702

Patent

active

050492381

ABSTRACT:
A method of dyeing paper utilizing dyes suitable for dyeing paper in blue shades having the formula ##STR1## wherein R is hydrogen, --OH, --OR.sup.1 , --NH.sub.2, NHR.sup.1, --NHCOR.sup.1, --NHSO.sub.2 R.sup.1, --NHCONH.sub.2 or --NHCONHR.sup.1, in which R.sup.1 is unsubstituted alkyl or alkyl substituted by C.sub.1 -C.sub.4 -alkoxy, hydroxy-substituted C.sub.1 -C.sub.4 -alkoxy, phenyl, phenoxy or phenylcarbamoyl, in each instance the phenyl moiety being unsubstituted or substituted by C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxy or phenoxy, R.sup.1 is also unsubstituted phenyl or naphthyl or phenyl or naphthyl which is substituted by sulfo, carboxy, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen, nitro, C.sub.1 -C.sub.4 -alkylcarbonylamino or C.sub.1 -C.sub.4 -alkoxycarbonylamino;

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Anderau, Chemical Abstracts, vol. 57, No. 3013b (1962).

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