Nitrosamine Or N-diazo Patents (Class 8/665)
  • Disazo acid dyes
    Patent number: 8357210
    Abstract: Compounds of the general formula (I) a process for their preparation and their use for dyeing and/or printing organic substrates.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: January 22, 2013
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Rainer Nusser, Urs Daetwyler
  • Process for dyeing cellulosic textile material with disperse dyes
    Patent number: 5298032
    Abstract: Cellulosic textile materials can be dyed with disperse dyes from supercritical CO.sub.2 by treating the textile materials with an auxiliary that promotes dye uptake, typically polyethylene glycol.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: March 29, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Wolfgang Schlenker, Peter Liechti, Dieter Werthemann, Angelo D. Casa
  • Highly concentrated, stable, free-flowing aqueous dispersions of diazotizable aromatic amines bearing electrophilic substituents
    Patent number: 4245993
    Abstract: The dispersions contain(a) 30 to 60% by weight of a diazotizable aromatic amine bearing electrophilic substituents and having an average particle size below 10 .mu.m (microns),(b) 0.1 to 5% by weight of a water-soluble polymer or copolymer of an N-vinyl-lactam,(c) 0.1 to 5% by weight of an anionic dispersing agent,(d) 0 to 30% by weight of at least one hydrotropic compound and/or at least one compound which lowers the freezing point and(e) water.The dispersions can be prepared by wet-grinding of the components. They can be used to produce azopigments in substance or azodyestuffs on textile substrates. Their diazotization proceeds very quickly and completely.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: January 20, 1981
    Assignee: Rohner AG Pratteln
    Inventors: Hans D. Kirner, Jacques Wegmann
  • Dyestuff formulations containing salts of diaryl ether sulfonic acids
    Patent number: 4217103
    Abstract: Dyestuff formulations which contain anionic, water-soluble dyestuffs or developable dyestuffs and salts of diaryl ether-sulphonic acids are suitable for the preparation of padding liquors, dyebaths and printing pastes.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: August 12, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karlheinz Wolf, Hans-Heinz Molls, Reinhard Nebeling, Hans-Werner Petroll, Reinhold Hornle, Richard Schwaebel, Vaclav Kaspar