Sumitomo Chemical Company, Limited

Taoka Chemical Company, Limited

Kazuya Ogino

Takashi Omura

Hideo Kawashita

Narutoshi Hayashi

Setsuko Yamamoto

Mituhiro Ohta

Koji Aburada

Yuriko Tamura

Naoki Harada

Kingo Akahori

Mahito Fujita

Kaneo Yokoyama

Yutaka Kayane

Koji Higashi

Satoshi Yamazaki

Narutohsi Hayashi

Setsuko Aoki

A dye-containing polarizing film having neutral color which comprises at least one disazo dye represented by the formula (I) in the form of the free acid

Dye containing polarizing film

An azo compound of the following formulae (I) or (II): ##STR1## wherein Q.sub.1 represents a phenyl group or a naphthyl group, Q.sub.2 represents a phenyl group; R represents hydroxy group; R.sub.1 and R.sub.2 each independently represent a hydrogen atom, a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a halogen atom; R.sub.3 and R.sub.4 each independently represent a hydrogen atom, a hydroxy group, a C.sub.1 -C.sub.4 alkyl group, a C.sub.1 -C.sub.4 alkoxy group or a substituted amino group; and X represents --NH--, --NHCO-- or --N.dbd.N--; or a salt thereof; and a polarizing film containing the same.

Azo compound and a polarizing film containing the same

A tetrakisazo compound of the formulae: ##STR1## wherein Q.sup.1 represents a phenyl or naphthyl group, Q.sup.2 represents a phenyl which is substituted by at least one substituent selected from a hydroxy group and an amino group, and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently represents a hydrogen atom, a hydroxy group, a lower alkyl group, a lower alkoxy group or a substituted or unsubstituted amino group, or a salt thereof, and a polarizing film which comprises the tetrakisazo compound or a salt thereof and which may further comprise other organic dyes.

Tetrakisazo compound and a polarizing film containing the same

A dye-containing polarizing film which comprises at least one dye selected from:

A trisazo compound represented by the following formula (I) in the free acid form: ##STR1## wherein Q is an phenyl or naphthyl group both of which may be unsubstituted or substituted; one of the A and B is hydroxy group and the other is amino group; K is 1 or 2; and one of m and n is 1 and the other is 0; a method for dyeing fiber materials, paper or leather by using the trisazo compounds and an ink containing the trisazo compounds, and the trisazo compound is excellent in solubility, and good in storage stability and free from clogging of nozzle caused by deposition. The ink using the trisazo compound gives a deep black-colored image excellent in clarity, water-durability and durability to light.

Trisazo compounds imparting deep black color a method for dyeing by

A tetrakisazo compound represented by the following formula (1) in the free acid form: ##STR1## wherein Q.sub.1 and Q.sub.2 independently represent phenylene or naphthylene group which may be optionally substituted, R.sub.4, R.sub.5 and R.sub.6 independently represent a hydrogen atom, a halogen atom, a hydroxy group, a sulfonic acid group or an amino, alkyl, alkoxy, carbamoyl or sulfamoyl group which may be optionally substituted, m is 0 or 1 and n is 1 or 2, and an ink which comprises the tetrakisazo compound. The ink exhibit excellent properties for ink jet printing.

Tetraskisazo compound and ink containing the compound

A trisazo compound represented by the following formula (1) in the free acid form: ##STR1## wherein Q' is phenylene group, Q.sup.2 is phenyl or naphtyl group, one of the A and B is a hydroxy group and the other is an amino group, K is 1 or 2, one of m and n is 1 and the other is 0, X and Y independently of one another are each --OR.sup.1, --SR.sup.2, --NR.sup.3 R.sup.4 or ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another are each a hydrogen atom, an alkyl, phenyl or naphthyl group; r is 1 or 2; and Z is --CH.sub.2 --, --O--, --SO.sub.2 -- or --NR.sup.5 -- wherein R.sup.5 is a hydrogen atom or C.sub.1 -C.sub.4 alkyl group;

Trisazo compound imparting black color, method for dyeing by using it

Herein is provided a trisazo compound represented by formula (I) in the free acid form: ##STR1## wherein Q.sub.1 is an unsubstituted or substituted phenylene or naphthylene group, Q.sub.2 is an unsubstituted or substituted phenyl or naphthyl group, Z is --SO.sub.2 CH.sub.2 CH.sub.2 OH or --SO.sub.2 CH.sub.2 CH.sub.2 SO.sub.3 H group, and L is 0 or 1. The trisazo compound provided herein is excellent in solubility and gives deep colored dyed product or image when used in dyeing or printing, so that it is useful as a dye and an ink. Herein are also provided a method for dyeing fiber materials, paper or leather by using said trisazo compound, and an ink containing said trisazo compound.

Trisazo compounds, method for dyeing fiber materials, paper or leather

The invention is directed to a novel disazo compound represented by the formula (I) ##STR1## wherein Q is a substituted or unsubstituted phenyl or naphthyl group; Me is copper, nickel, zinc or iron; and Z is hydrogen, lower alkyl, lower alkoxyl, sulfo, or substituted or unsubstituted amino; and also to a polarizing film having said disazo compound incorporated into a polarizing film base. The polarizing film exhibits high polarizing activities comparable to those of an iodine-containing polarizing film, and also has excellent durability.

Disazo dyes having aminobenzoylamino group

A dye-containing polarizing film comprising a polarizing film material and a metal-containing dye represented by the following formula (I): ##STR1## wherein Me is a transition metal selected from copper, nickel, zinc and iron;

Dye-containing polarizing film

An ink composition for ink jet recording, which contains a water-soluble dye, an organic solvent and water, in which the dye is represented by the formula (1) as shown in the state of free acid:

Ink compositions for ink jet recording

A trisazo compound represented by the following formula in the free acid form: ##STR1## wherein Q.sub.1 and Q.sub.2 independently of one another are each unsubstituted or substituted phenyl or naphthyl group and l represents 0 or 1, which is useful for dyeing fiber, paper, leather and the like having hydroxy or amido group in black color, and for use in an ink used in ink jet and the like.

Trisazo compounds and use thereof

A disazo compound of the formula (I) in the free acid form, ##STR1## and an ink jet recording ink composition containing the same are provided, and the composition is superior in stability during storage or use, heat resistance, image clearness, water resistance and light fastness, and has a desirable tint as a red color.

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Minoo, Japan

Kazuya Ogino