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Class Information
Number: 534/748
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Azo > Azo bonded directly to an acylic carbon which is bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom > Two azo groups attached indirectly to each other by nonionic bonding > Each azo group is bonded directly to an acyclic carbon which is bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom > Plural amino nitrogens bonded directly to a benzene ring which is between the azo groups
Description: Compounds wherein between the azo groups is a benzene ring to which at least two amino nitrogens are bonded directly.

Patents under this class:

Patent Number Title Of Patent Date Issued
6756486 Non-migrating metallized disazo green shade yellow pigment Jun. 29, 2004
6504045 Crystal polymorphs of a yellow disazo colorant, and their preparation Jan. 7, 2003
6437104 Preparation of disazo condensation pigments in microreactors Aug. 20, 2002
5889162 Strong green-shade yellow disazo pigment Mar. 30, 1999
5559216 Single-step process for the preparation of bis-(acetoacetylamino) benzene disazo pigments Sep. 24, 1996
5298609 Disazo compounds containing cycloalkyl ester or cycloalkylamide groups Mar. 29, 1994
5266110 Crystal modification of C.I. Pigment Yellow 16 Nov. 30, 1993
5185435 Process for the preparation of bisazo pigments in halogen-free solvents Feb. 9, 1993
5062894 Poly (alkylene oxide)-modified diarylide pigment composition Nov. 5, 1991
5030247 Mixtures of disazo compounds containing two phenyl diazo component radicals having one or two (C.sub.1-4 alkoxy)carbonyl groups and a bis-acetoacetamido-arylene coupling radical Jul. 9, 1991
4946948 Mono and disazo compounds based on b-hydroxy-naphthoic acid derivatives or acetoacetarylide derivatives containing long-chain alkyl ester or alkylamide radicals Aug. 7, 1990
4946509 Diarylide pigment compositions Aug. 7, 1990
4946508 Disazo pyrazolone pigment compositions Aug. 7, 1990
4557732 Process for spin-dyeing of acid-modified polymers of acrylonitrile by the wet-spinning procedure using quaternary ammonium or cyclammonium dyestuffs of low M value and high cation weight havin Dec. 10, 1985
4544736 1,4-Di-[2'-(2",4"-dichlorophenylazo)-3'-oxobutyramido]-2-methoxybenzene Oct. 1, 1985
4540775 1,4-Di-[2'-(2",4"-dichlorophenylazo)acetoacetamido]-2,5-dimethylbenzene Sep. 10, 1985
4272298 Process for conditioning a pigment in liquid ammonia Jun. 9, 1981
4081439 Aromatic disazo pigments Mar. 28, 1978
4070353 Dicarboxylic acid ester diazo pigments Jan. 24, 1978
4065449 Tetrachloro substituted disazo pigments Dec. 27, 1977
4065448 Tertiary alkyl substituted disazo pigments Dec. 27, 1977
4062838 Disazo pigments containing acylamino groups Dec. 13, 1977
4055559 Disazo pigment containing at least 2 chlorine atoms and process for their manufacture Oct. 25, 1977
4051122 Disazo pigments containing tetracarboxylic acid ester groups Sep. 27, 1977
4003886 Tetracarboxylic acid ester substituted disazo pigments Jan. 18, 1977
3997521 Bis-(dialkoxycarbonylphenylazo)acetoacetamidoarylenes Dec. 14, 1976
3978038 Disazo pigments containing at least one nitro group on the diazo component Aug. 31, 1976
3951943 Coupling process in the preparation of disazo diimides Apr. 20, 1976
3935182 Water-soluble quaternary ammonium heterocyclic azo dyestuffs Jan. 27, 1976

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