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Patent Agency Ranking
公开(公告)号：BR7608409A
公开(公告)日：1977-12-13
申请号：BR7608409
申请日：1976-12-15
Applicant: HOECHST AG
IPC: C08K5/00 , C08K5/22 , C08L7/00 , C08L21/00 , C08L33/00 , C08L33/02 , C08L67/00 , C08L77/00 , C09B35/34 , C09D7/00 , C09D7/12
Abstract: 1527009 Disazo pigments HOECHST AG 17 Dec 1976 [20 Dec 1975] 52818/76 Heading C4P Novel disazo pigments having the formula (where each K independently is the radical of a coupling component which does not contain watersolubilizing groups) are prepared by tetraazotizing 3,8-diamino-phenanthridone and coupling with 2 mols. of a coupling component, or a mixture of coupling components of formula K-H. The coupling is preferably carried out in the presence of a surfactant and organic solvent. The product is preferably heated in an aqueous, aqueous organic or organic medium at 100-200‹ C. to modify the physical form. The pigments are used in spin dyeing and also to colour printing inks, lacquers, dispersion paints, rubbers, plastics materials and natural or synthetic resins and paper.
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公开(公告)号：BR7708795A
公开(公告)日：1978-08-22
申请号：BR7708795
申请日：1977-12-30
Applicant: HOECHST AG
IPC: C07D271/10 , C07C243/38 , C07D271/107 , C09B35/34
Abstract: 2,5-Bis-(4'-aminophenyl)-1,3,4-oxadiazoles which are chlorinated in the phenyl nuclei are obtained by condensing hydrazine or a hydrazine yielding agent with equal or different chlorinated benzoic acids or acylating acid derivatives having in para-position to the acid group an amino group or a group capable of being transformed into the amino group, and, thereafter, effecting ring closure of the so-obtained bis-hydrazide to yield the oxadiazole. The products are bis-diazo components, especially for pigments having a very high tinctorial strength, clear and pure shades, a good fastness to light, to heat and to solvents.
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