US 4,169,810 AGranted

Mixtures of optical brighteners

AssigneeHoechst Aktiengesellschaft

InventorsDieter Gunther, Rudiger Erckel, Gunter Rosch, Heinz Probst

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Abstract

A mixture of optical brighteners containing 0.05 to 0.95 part by weight of a compound from the benzoxazolyl- or benzothiazolylstilbene series and 0.95 to 0.05 part by weight of a compound of the bis-benzoxazolyl- or bis-benzothiazolylstilbene series or of the benzoxazolyl- or benzothiazolyl-stilbene oxazolo[5,4-6]pyridinyl or oxazolo[2,3-b]pyridinyl series. These mixtures show an enhanced degree of whiteness as compared to the same amount of the single components.

Claims4

Dependent claims

Mixtures of optical brighteners consisting of from 0.05 to 0.95 part by weight of a compound of the formula I ##STR27## and from 0.95 to 0.05 part by weight of a compound of the formulae II or III ##STR28## in which formulae the symbols X, R.sup.1, R.sup.2, A and B have the following meanings:

X is an oxygen or sulfur atom;
R.sup.1 and R.sup.2 independently from each other, are identical or different radicals selected from the group of hydrogen, fluorine or chlorine atoms, phenyl, C.sub.1 -C.sub.9 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -dialkylamino, acylamino radicals, or optionally functionally modified carboxy or sulfo groups, two adjacent radicals R.sup.1 and R.sup.2 together optionally representing a benzo ring, a lower alkylene or a 1,3-dioxa-propylene group,
A is cyano, a group of the formulae --COOR.sup.3 or --CONR.sub.2.sup.3, in which R.sup.3 is hydrogen, alkenyl, C.sub.1 -C.sub.18 -alkyl, cycloalkyl, aryl, alkylaryl, halogenoaryl, aralkyl, alkoxyalkyl, halogenoalkyl, hydroxy-alkyl, alkylamino-alkyl, carboxyalkyl or carboalkoxyalkyl, or two alkyl or alkenyl radicals having the meaning of R.sup.3, together with the nitrogen atom, may form a morpholine, piperidine or piperazine ring;
or A is a group of the formulae ##STR29## in which R.sup.4 is a linear or branched alkyl group having from 1 to 18 carbon atoms, preferably 1 to 6 carbon atoms, optionally substituted by hydroxy groups, halogen atoms, lower alkoxy, dialkylamino, lower alkylmercapto, chloro-aryloxy, aryloxy, arylmercapto or aryl radicals;
in the case of the dialkylamino-alkyl groups the two alkyl groups optionally forming together a morholine, piperidine or piperazine ring;
or R.sup.4 is a group of the formula --(CH.sub.2 CH.sub.2 O).sub.n --R, in which n is 1, 2 or 3 and R is H, lower alkyl, dialkylamino-alkoxyalkyl or alkylthio-alkoxyalkyl, the alkyl groups in the dialkylamino-alkoxyalkyl optionally forming together a piperidine, pyrrolidine, hexamethylene-imine, morpholine, or piperazine ring;
or R.sup.4 is a group of the formula --(CH.sub.2).sub.m --CH.dbd.CH--R (m is an integer of from 0 to 5), or a radical of the formula:
##STR30## in which R.sup.5 and R.sup.6, being identical or different, each are radicals selected from the group of hydrogen, fluorine or chlorine atoms, phenyl, lower alkyl, lower alkoxy, (C.sub.1 -C.sub.4)-acylamino groups, or optionally modified fied carboxy or sulfo groups;
two adjacent radicals R.sup.5 and R.sup.6 together optionally being a lower alkylene group, a fused benzo ring or a 1,3-dioxapropylene group;
and B is a group of the formulae ##STR31## in which R.sup.7 and R.sup.8, independently from each other, are hydrogen, fluorine or chlorine atoms or C.sub.1 -C.sub.4 alkyl groups.

7 more elements

Dependencies are inferred from the claim text.

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Abstract

X is an oxygen or sulfur atom;
R.sup.1 and R.sup.2 independently from each other, are identical or different radicals selected from the group of hydrogen, fluorine or chlorine atoms, phenyl, C.sub.1 -C.sub.9 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -dialkylamino, acylamino radicals, or optionally functionally modified carboxy or sulfo groups, two adjacent radicals R.sup.1 and R.sup.2 together optionally representing a benzo ring, a lower alkylene or a 1,3-dioxa-propylene group,
A is cyano, a group of the formulae --COOR.sup.3 or --CONR.sub.2.sup.3, in which R.sup.3 is hydrogen, alkenyl, C.sub.1 -C.sub.18 -alkyl, cycloalkyl, aryl, alkylaryl, halogenoaryl, aralkyl, alkoxyalkyl, halogenoalkyl, hydroxy-alkyl, alkylamino-alkyl, carboxyalkyl or carboalkoxyalkyl, or two alkyl or alkenyl radicals having the meaning of R.sup.3, together with the nitrogen atom, may form a morpholine, piperidine or piperazine ring;
or A is a group of the formulae ##STR29## in which R.sup.4 is a linear or branched alkyl group having from 1 to 18 carbon atoms, preferably 1 to 6 carbon atoms, optionally substituted by hydroxy groups, halogen atoms, lower alkoxy, dialkylamino, lower alkylmercapto, chloro-aryloxy, aryloxy, arylmercapto or aryl radicals;
in the case of the dialkylamino-alkyl groups the two alkyl groups optionally forming together a morholine, piperidine or piperazine ring;
or R.sup.4 is a group of the formula --(CH.sub.2 CH.sub.2 O).sub.n --R, in which n is 1, 2 or 3 and R is H, lower alkyl, dialkylamino-alkoxyalkyl or alkylthio-alkoxyalkyl, the alkyl groups in the dialkylamino-alkoxyalkyl optionally forming together a piperidine, pyrrolidine, hexamethylene-imine, morpholine, or piperazine ring;
or R.sup.4 is a group of the formula --(CH.sub.2).sub.m --CH.dbd.CH--R (m is an integer of from 0 to 5), or a radical of the formula:
##STR30## in which R.sup.5 and R.sup.6, being identical or different, each are radicals selected from the group of hydrogen, fluorine or chlorine atoms, phenyl, lower alkyl, lower alkoxy, (C.sub.1 -C.sub.4)-acylamino groups, or optionally modified fied carboxy or sulfo groups;
two adjacent radicals R.sup.5 and R.sup.6 together optionally being a lower alkylene group, a fused benzo ring or a 1,3-dioxapropylene group;
and B is a group of the formulae ##STR31## in which R.sup.7 and R.sup.8, independently from each other, are hydrogen, fluorine or chlorine atoms or C.sub.1 -C.sub.4 alkyl groups.

7 more elements