Nitrogen Single Bonded Directly To The -c(=x)- Group (e.g., Carboxamide, Guanyl, Etc.) Patents (Class 534/811)
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Patent number: 8679376Abstract: A polarization film, including a polymer resin, and a dichroic dye dispersed in the polymer resin and represented by the following Chemical Formula 1: wherein, in Chemical Formula 1, Ar, R1 to R4 are the same as those defined in the detailed description.Type: GrantFiled: March 7, 2013Date of Patent: March 25, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-Joo Lee, Deuk-Kyu Moon, Jong-Hoon Won, Myung-Man Kim, Myung-Sup Jung
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Patent number: 8477268Abstract: Azo compounds represented by formula (1) (In the formula, R1 represents a lower alkoxy group with a sulfone group. R2-R5 each independently represents a hydrogen atom, lower alkyl group or lower alkoxy group. X is an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group. m represents 1 or 2 and n represents 0 or 1.) and salts thereof.Type: GrantFiled: May 19, 2009Date of Patent: July 2, 2013Assignees: Nippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
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Patent number: 8158022Abstract: The present invention provides a polarizing film containing an azo compound represented by the following formula (1): in which X is a hydrogen atom, a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 4 carbon atoms, and M is a counter ion.Type: GrantFiled: December 30, 2010Date of Patent: April 17, 2012Assignee: Nitto Denko CorporationInventors: Hisanari Onouchi, Sadahiro Nakanishi
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Publication number: 20110164208Abstract: Azo compounds represented by formula (1) (In the formula, R1 represents a lower alkoxy group with a sulfone group. R2-R5 each independently represents a hydrogen atom, lower alkyl group or lower alkoxy group. X is an optionally substituted amino group, optionally substituted benzoylamino group, optionally substituted phenylamino group, optionally substituted phenyl azo group or optionally substituted naphthotriazole group. m represents 1 or 2 and n represents 0 or 1.) and salts thereof.Type: ApplicationFiled: May 19, 2009Publication date: July 7, 2011Applicants: NIPPON KAYAKU KABUSHIKI KAISHA, POLATECHNO CO., LTD.Inventors: Takuto Nishiguchi, Hiroaki Ohno, Takahiro Higeta, Yuichi Sadamitsu
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Patent number: 6699976Abstract: A polyazo compound or salt thereof covering the region of from 500 to 580 nm and manifesting high initial polarization ability and represented by the following formulae (I) or (II): wherein, A represents a phenyl having sulfo and/or carboxyl and optionally having a lower alkyl or lower alkoxy, or a naphthyl having 1 to 3 sulfos, R1 to R6 represent hydrogen, lower alkyl or alkoxy, m and n each independently represent 0 or 1, R7 represents hydrogen or sulfo, D and E each independently represents —NHCO— or —N═N—, G represents —CH2—, alkylene having 2-4 carbon atoms, phenylene or —CH═CH—, and R8 represents sulfo, carboxyl or lower alkoxycarbonyl; is provided.Type: GrantFiled: July 5, 2002Date of Patent: March 2, 2004Assignee: Sumitomo Chemical Company, LimitedInventors: Toru Ashida, Yoshiteru Ohta, Narutoshi Hayashi
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Patent number: 6399752Abstract: A polyazo compound or salt thereof of the following formula (I): wherein, A represents a naphthyl having 1 to 3 sulfos or a phenyl having 1 to 2 hydrophilic groups selected from sulfo and carboxyl and optionally having a lower alkyl or lower alkoxy, B represents —NHCO— or —N═N—, n represents 0 or 1, R1 to R6 represent hydrogen, lower alkyl or lower alkoxy, R7 represents hydrogen or sulfo, D represents —N═N— when B is —N═N— and represents —NHCO—, —N═N— or —NH— when E is —NHCO—, and E represents a phenyl optionally having 1 to 3 groups selected from hydroxyl, amino, nitro, sulfo, carboxyl, lower alkyl and lower alkoxy; and a dye-based polarization film which manifests high polarization ability, is excellent in durability and light resistant to exposure for a long period of time and is obtainable by adding the above polyazo compound or salt thereof; are provided.Type: GrantFiled: November 23, 2001Date of Patent: June 4, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Yoshiteru Ohta, Narutoshi Hayashi, Toru Ashida
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Patent number: 6277966Abstract: An azo-compound, free acid form of which is represented by the following formula (I): wherein A and B represent, independently with each other, a phenyl having one or two groups selected from sulfo and carboxyl or a naphthyl having 1 to 3 sulfos; R1, R2, R3, R4, R5 and R6 represent, independently with each other, hydrogen, lower alkyl or lower alkoxy; and X represents —N═N— or —NHCO—, and a dye polarizing film containing the azo-compound in a polarizing film base, which exhibits a high polarizing performance and is excellent in durability and light fastness, are provided.Type: GrantFiled: December 15, 2000Date of Patent: August 21, 2001Assignee: SumitomoChemical Company, Ltd.Inventors: Yutaka Kayane, Akihiro Taguma, Narutoshi Hayashi
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Publication number: 20010005748Abstract: An azo-compound, free acid form of which is represented by the following formula (I): 1Type: ApplicationFiled: December 15, 2000Publication date: June 28, 2001Inventors: Yutaka Kayane, Akihiro Taguma, Narutoshi Hayashi
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Patent number: 6140477Abstract: A polyazo compound capable of effectively absorbing near-infrared rays, which can be produced from readily available raw materials is provided, which comprises at least one --OH group or at least one group derived from --OH group at p-position of the azo group in the molecule of the polyazo compound. This compound can be produced by diazotizing a substituted or nonsubstituted aromatic monocyclic or polycyclic compound or heterocyclic compound, each having a diazotizable primary amino group, and successively coupling the resulting diazo component with an azo component having a diazotizable primary amino group, the last azo component being such that --OH group or a group derived from --OH group be present at p-position to the azo group resulting from the azo component.Type: GrantFiled: March 23, 1999Date of Patent: October 31, 2000Assignee: Hakkol Chemical Co., Ltd.Inventors: Shigekazu Matsumoto, Takao Yanagisawa, Shigehiro Matsumoto, Kunio Shimabukuro
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Patent number: 6072042Abstract: The present invention provides a bis (aminocarbonylnaphthol) derivative which is useful as a raw material for novel azo pigments by bisamidation of each one carboxyl group of two 2-hydroxynaphthalene-3,6-dicarboxylic acids using an aliphatic or aromatic diamine.Type: GrantFiled: June 5, 1998Date of Patent: June 6, 2000Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo KenkyujoInventors: Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori, Katsunori Tanikawa, Mariko Tanigawa
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Patent number: 5446135Abstract: Dyes having the specific structural formula (1) set out below, their copper salt dyes, water-soluble azo dyes containing the dyes or the copper salt dyes, and polarizing films containing the water-soluble azo dyes: ##STR1## wherein A means a benzene or naphthalene ring having a sulfone group or a base thereof, Y and Z individually denote a group of the following formula (a); ##STR2## wherein R.sup.2 is a hydrogen atom, a methyl group, a methoxyl group or an ethoxyl group and R.sup.3 is a methyl, methoxyl or ethoxyl group,R.sup.1 represents an amino, C.sub.1-4 alkylamino, C.sub.2-4 alkylcarboxyamino, benzoylamino or phenylamino group bonded to the 6 or 7 position of the naphthalene ring, and X denotes a hydrogen, sodium, potassium or lithium atom, with the proviso that Y and Z are different but, when both R.sup.2 s are hydrogen atoms and both R.sup.3 s are methoxyl groups, Y and Z may be the same.Type: GrantFiled: March 14, 1994Date of Patent: August 29, 1995Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Tsutami Misawa, Akira Ogiso, Rihoko Imai, Hisato Itoh
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Patent number: 5318856Abstract: Dyes having the specific structural formula (1) set out below, their copper salt dyes, water-soluble azo dyes containing the dyes or the copper salt dyes, and polarizing films containing the water-soluble azo dyes: ##STR1## wherein A means a benzene or naphthalene ring having a sulfone group or a base thereof, Y and Z individually denote a group of the following formula (a): ##STR2## wherein R.sup.2 is a hydrogen atom, a methyl group, a methoxyl group or an ethoxyl group and R.sup.3 is a methyl, methoxyl or ethoxyl group, R.sup.1 represents an amino, C.sub.1-4 alkylamino, C.sub.2-4 alkylcarboxyamino, benzoylamino or phenylamino group bonded to the 6 or 7 position of the naphthalene ring, and X denotes a hydrogen, sodium, potassium or lithium atom, with the proviso that Y and Z are different but, when both R.sup.2 s are hydrogen atoms and both R.sup.3 s are methoxyl groups, Y and Z may be the same.Type: GrantFiled: December 24, 1992Date of Patent: June 7, 1994Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Tsutami Misawa, Akira Ogiso, Rihoko Imai, Hisato Itoh
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Patent number: 5213614Abstract: An ink comprising: water, a water soluble organic solvent, and a colorant represented by the following general formula (I): ##STR1## wherein Q1 is a substituted phenyl group; Q2 is a substituted or unsubstituted p-phenylene or a substituted or unsubstituted 1,4-naphtylene group; Q3 is a substituted phenyl group; M is an alkali metal, ammonium or an organic ammonium; and n is 0 or 1, and wherein said colorant has at least a sulfone group and a carboxyl group and the number of said sulfone groups is not greater than the number of said carboxyl groups. Such an ink may be used for an ink jet recording.Type: GrantFiled: January 17, 1992Date of Patent: May 25, 1993Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Eida, Mayumi Yamamoto, Takao Yamamoto
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Patent number: 5198022Abstract: A alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an intense black at low concentration; and remains black on acid papers. The aqueous inks are stable and exhibit good printhead nozzle maintenance.Type: GrantFiled: January 17, 1992Date of Patent: March 30, 1993Assignee: Lexmark International, Inc.Inventors: Rodney O. Aulick, Bradley L. Beach, Donald L. Elbert, Terence E. Franey, James F. Feeman, John M. Olson, Allen C. Sanders, Robert L. Vollmer
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Patent number: 5180817Abstract: 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.Type: GrantFiled: March 18, 1991Date of Patent: January 19, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuya Ogino, Kingo Akahori, Naoki Harada
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Patent number: 5178671Abstract: Provided is an ink comprising a recording agent and a liquid medium for dissolution or dispersion thereof, the recording agent being a compound represented by the general formula ##STR1## where R.sup.1 is a radical selected from the group of lower alkyl, lower alkoxy, --COOM, and --SO.sub.3 M; R.sup.2 and R.sup.3 are respectively a radical selected from the group of hydrogen, lower alkyl, lower alkoxy, amino, --NHCOCH.sub.3, --SO.sub.3 M, and --COOM; R.sup.4 and R.sup.5 are respectively a radical selected from the group of lower alkyl, lower alkoxy, --NHCOCH.sub.3, --SO.sub.3 M, and COOM; A is ##STR2## R.sup.6 is a radical selected from the group of acetyl, benzoyl, --SO.sub.2 C.sub.6 H.sub.5, --SO.sub.2 C.sub.6 H.sub.4 --CH.sub.3, phenyl, which is unsubstituted or substituted by --COOM or methyl, and ##STR3## R.sup.7 and R.sup.8 are respectively a radical selected from the group of hydrogen, hydroxyl, and --C.sub.2 H.sub.4 OH; R.sup.9 and R.sup.Type: GrantFiled: June 11, 1992Date of Patent: January 12, 1993Assignee: Canon Kabushiki KaishaInventors: Takao Yamamoto, Tsuyoshi Eida, Mayumi Yamamoto
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Patent number: 5167703Abstract: Provided is an ink comprising at least water, a water-soluble organic solvent, and a dye, the dye comprising a compound represented by the general formula (I): ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are respectively hydrogen or SO.sub.3 M; R.sub.4 is hydrogen, OCH.sub.3, NH.sub.2, NHCONH.sub.2, or SO.sub.3 M; R.sub.5 is hydrogen or SO.sub.3 M; R.sub.6 is hydrogen or NH.sub.2 ; R.sub.7 is hydrogen, CH.sub.3, or OCH.sub.3 ; R.sub.8 is hydrogen, COOM, or SO.sub.3 M; R.sub.5 is hydrogen and R.sub.8 is COOM when both of R.sub.4 and R.sub.6 are respectively NH.sub.2 ; M is an alkali metal, ammonium, or organic ammonium; and m is 0 or 1, or a compound represented by the general formula (II): ##STR2## wherein R.sub.1 is hydrogen, CH.sub.3, COOM, or SO.sub.3 M; R.sub.2 is hydrogen, CH.sub.3, or COOM; R.sub.3 is hydrogen, chlorine, COOM, or SO.sub.3 M; R.sub.4 is hydrogen, OCH.sub.3, NH.sub.2, NHCONH.sub.2, or SO.sub.3 M; R.sub.5 is hydrogen or SO.sub.3 M; R.sub.6 is hydrogen or NH.sub.2 ; R.sub.Type: GrantFiled: November 27, 1991Date of Patent: December 1, 1992Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Eida, Mayumi Yamamoto, Takao Yamamoto
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Patent number: 5127946Abstract: Provided is an ink containing a recording agent and a liquid medium for dissolution or dispersion thereof, said ink comprising, as the recording agent, a compound represented by the general formula (A) ##STR1## where n is 0 or 1; R.sub.1, R.sub.2, and R.sub.3 are respectively a substituent selected from the group consisting of hydrogen, methyl, methoxy, hydroxy, amino, acetylamino, and sulfonic acid; and M is an alkali metal, ammonium, or an organic ammonium.Type: GrantFiled: January 23, 1991Date of Patent: July 7, 1992Assignee: Canon Kabushiki KaishaInventors: Tsuyoshi Eida, Takao Yamamoto, Mayumi Yamamoto
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Patent number: 5049238Abstract: 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;X, each independently of the other, is hydrogen, unsubstituted alkyl or alkoxy or alkyl or alkoxy which is substituted by C.sub.1 -C.sub.4 -alkoxy, hydroxy-substituted C.sub.1 -C.sub.Type: GrantFiled: July 19, 1989Date of Patent: September 17, 1991Assignee: Ciba-Geigy CorporationInventor: Adolf Kaser
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Patent number: 4910299Abstract: Disperse dyes suitable for dyeing textile material composed of polyester dyes of the formula ##STR1## in which D is the radical of a substituted or unsubstituted, homocyclic or heterocyclic diazo component belonging to the series comprising thienyl, thiazolyl, isothiazolyl, 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, benzothiazolyl, benzoisothiazolyl, pyrazolyl, imidazolyl or phenyl,X is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, acylamino, halogen or a group of the formula -NH-CO-NHQ in which Q is hydrogen, C.sub.1 -C.sub.4 -alkyl or phenyl,Y is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkoxy,R is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.2 -C.sub.12 -alkenyl or phenyl, or Y and R, together with the nitrogen atom and the two C atoms linking them, form a 5-membered ring or 6-membered ring,B is a l inear or branched C.sub.2 -C.sub.6 -alkylene radical,W is halogen, C.sub.Type: GrantFiled: December 2, 1987Date of Patent: March 20, 1990Assignee: Ciba-Geigy CorporationInventors: Angelo D. Casa, Peter Liechti, Max Dempfle
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Patent number: 4841037Abstract: A naphthalene trisazo compound represented by the general formula (I) or (II): ##STR1## wherein A and B each represents a substituted or unsubstituted benzene or naphthalene ring; m represents zero or 1; and M represents an alkali metal atom, ammonium or H.Am (wherein Am represents an amine); or ##STR2## wherein X represents a hydrogen atom, a lower alkyl group, a phenyl group or a phenyl group substituted by --SO.sub.3 M; m represents zero or 1; M represents an alkali metal atom, ammonium or H.Am (wherein Am represents an amine); A, B and C each represents a substituted or an unsubstituted benzene or naphthalene ring, provided that B and C do not represent a naphthalene ring at the same time. A recording liquid containing these compounds is suitable for use in an ink-jet recording system.Type: GrantFiled: June 10, 1986Date of Patent: June 20, 1989Assignees: Canon Kabushiki Kaisha, Mitsubishi Chemical Industries LimitedInventors: Tokuya Ohta, Masatsune Kobayashi, Yuko Suga, Konoe Miura, Hiroshi Takimoto, Tomio Yoneyama
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Patent number: 4743523Abstract: A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.Type: GrantFiled: March 27, 1986Date of Patent: May 10, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
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Patent number: 4670548Abstract: Water-soluble dyestuffs of the formulaA--N.dbd.N--B--N.dbd.N--C--N.dbd.N--KwhereinA denotes sulphophenyl or sulphonaphthyl, which are optionally further substituted,B denotes sulpho-1,4-naphthylene, which is optionally further substituted,C denotes 1,4-phenylene or 1,4-naphthylene, which are optionally further substituted, andK denotes the radical of an optionally functionally modified coupling component of the hydroxybenzene series, aminobenzene series, aminopyrazole series, pyridone series or acetoacetic acid arylide series, or of barbituric acid or citrazinic acid,and their use for dyeing nitrogen-containing fibre materials, such as wool and polyamide, and for dyeing leather.Type: GrantFiled: March 24, 1980Date of Patent: June 2, 1987Assignee: Bayer AktiengesellschaftInventors: Jochen Westphal, Hermann Henk
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Patent number: 4600674Abstract: Disclosed is an electrophotographic photoconductive material excellent in sensitivity and durability which comprises an electroconductive substrate and, provided thereon, a photosensitive layer containing a trisazo pigment represented by the general formula ##STR1## wherein R's, which may be the same or different, represent each a hydrogen atom, halogen atom, substituted or unsubstituted alkyl group, alkoxyl group, or nitrile group; n is an integer of 1 or 2; and A represents ##STR2## wherein Z represents a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring or a substituted or unsubstituted aromatic hetero-ring; X represents a hydrogen atom, an alkyl group, or a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring, a substituted or unsubstituted aromatic hetero ring, or a substituted or unsubstituted hetero ring; m is 0 or 1; B represents a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring, a substType: GrantFiled: June 24, 1985Date of Patent: July 15, 1986Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuhiro Emoto, Akira Itoh
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Patent number: 4594410Abstract: Azo dyes of the formula ##STR1## and external salts thereof, wherein F is the residue of a monoazo or disazo compound in 1:1 metal complex form or of a trisazo, disazoazoxy or tetrakisazo compound in metal-free or 1:1 metal complex form,each X is independently --NR.sub.2 --Q--NR.sub.3 R.sub.4 or --NR.sub.2 --Q--N.sup..sym. R.sub.5 R.sub.6 R.sub.7,whereinQ is linear or branched C.sub.2-6 alkylene or --NH--CO--CH.sub.2 --,R.sub.2 is hydrogen or C.sub.1-4 alkyl,each of R.sub.3 and R.sub.4 is independently hydrogen; C.sub.1-6 alkyl; C.sub.2-6 alkyl monosubstituted by cyano or hydroxy in the 2-, 3-, 4-, 5- or 6-position; phenyl(C.sub.1-3 alkyl); phenyl(C.sub.1-3 alkyl) having, on the phenyl ring, 1, 2 or 3 substituents selected from chloro, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; C.sub.5-6 cycloalkyl or C.sub.5-6 cycloalkyl substituted by 1, 2 or 3 C.sub.1-4 alkyl groups or --NR.sub.3 R.sub.Type: GrantFiled: August 18, 1982Date of Patent: June 10, 1986Assignee: Sandoz Ltd.Inventor: Reinhard Pedrazzi
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Patent number: 4591634Abstract: Trisazo/azoxy dyestuff mixtures which in the form of free acid correspond to the formula ##STR1## in which R denotes H or optionally substituted alkyl,X and Y denote H, alkyl, alkoxy, halogen, hydroxyl, alkylsulphonyl, optionally mono- or di-alkyl-substituted sulphamyl, carboxyl and carboxyalkoxy andK denotes the radical of a coupling component,are outstandingly suitable for dyeing fibre materials containing hydroxyl groups and fibre materials containing amide groups, such as cotton, natural and synthetic polyamide, paper and leather. They give dyeings having good build-up capacity and good combinability.Type: GrantFiled: July 15, 1985Date of Patent: May 27, 1986Assignee: Bayer AktiengesellschaftInventors: Karl J. Herd, Horst Nickel
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Patent number: 4485042Abstract: Leathers can be advantageously dyed with water-soluble polyazo dyestuffs having, in the form of the free acid, the formula ##STR1## wherein A is a member of the benzene, naphthalene or heterocyclic series;B has the formula ##STR2## n is the number 1 or 2; m is a number from 1 to 4;X is hydroxyl or amino;Y is hydroxyl or amino but X differs from Y;Z is hydroxyl or amino unsubstituted or substituted by alkyl having 1 to 4 carbon atoms, alkanoyl having 1 to 4 carbon atoms or by a moiety of the formula ##STR3## R.sup.1 is hydrogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms or alkoxyalkoxy having 3 to 7 carbon atoms; andR.sup.2 and R.sup.3 independently of one another are each hydrogen or alkyl having 1 to 4 carbon atoms.Type: GrantFiled: August 20, 1982Date of Patent: November 27, 1984Assignee: Cassella AktiengesellschaftInventors: Norbert Armbrecht, Wolfgang Bauer, Joachim Ribka